Skip to main content

Main menu

  • Home
  • Articles
    • Current Issue
    • Next in The JI
    • Archive
    • Brief Reviews
    • Pillars of Immunology
    • Translating Immunology
    • Most Read
    • Top Downloads
    • Annual Meeting Abstracts
  • COVID-19/SARS/MERS Articles
  • Info
    • About the Journal
    • For Authors
    • Journal Policies
    • Influence Statement
    • For Advertisers
  • Editors
  • Submit
    • Submit a Manuscript
    • Instructions for Authors
    • Journal Policies
  • Subscribe
    • Journal Subscriptions
    • Email Alerts
    • RSS Feeds
    • ImmunoCasts
  • More
    • Most Read
    • Most Cited
    • ImmunoCasts
    • AAI Disclaimer
    • Feedback
    • Help
    • Accessibility Statement
  • Other Publications
    • American Association of Immunologists
    • ImmunoHorizons

User menu

  • Subscribe
  • Log in

Search

  • Advanced search
The Journal of Immunology
  • Other Publications
    • American Association of Immunologists
    • ImmunoHorizons
  • Subscribe
  • Log in
The Journal of Immunology

Advanced Search

  • Home
  • Articles
    • Current Issue
    • Next in The JI
    • Archive
    • Brief Reviews
    • Pillars of Immunology
    • Translating Immunology
    • Most Read
    • Top Downloads
    • Annual Meeting Abstracts
  • COVID-19/SARS/MERS Articles
  • Info
    • About the Journal
    • For Authors
    • Journal Policies
    • Influence Statement
    • For Advertisers
  • Editors
  • Submit
    • Submit a Manuscript
    • Instructions for Authors
    • Journal Policies
  • Subscribe
    • Journal Subscriptions
    • Email Alerts
    • RSS Feeds
    • ImmunoCasts
  • More
    • Most Read
    • Most Cited
    • ImmunoCasts
    • AAI Disclaimer
    • Feedback
    • Help
    • Accessibility Statement
  • Follow The Journal of Immunology on Twitter
  • Follow The Journal of Immunology on RSS

Paucity of Clinical Disease despite Serological Autoimmunity and Kidney Pathology in Lupus-Prone New Zealand Mixed 2328 Mice Deficient in BAFF

Chaim O. Jacob, Luminita Pricop, Chaim Putterman, Michael N. Koss, Yi Liu, Maria Kollaros, Sarah A. Bixler, Christine M. Ambrose, Martin L. Scott and William Stohl
J Immunol August 15, 2006, 177 (4) 2671-2680; DOI: https://doi.org/10.4049/jimmunol.177.4.2671
Chaim O. Jacob
*Department of Medicine,
†Division of Gastrointestinal and Liver Diseases and
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Luminita Pricop
¶Department of Medicine, Hospital for Special Surgery, Weill Medical College of Cornell University, New York, NY 10021;
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Chaim Putterman
∥Division of Rheumatology, Albert Einstein College of Medicine, Bronx, NY 10461; and
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Michael N. Koss
§Department of Pathology, University of Southern California Keck School of Medicine, Los Angeles, CA 90033;
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Yi Liu
¶Department of Medicine, Hospital for Special Surgery, Weill Medical College of Cornell University, New York, NY 10021;
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Maria Kollaros
∥Division of Rheumatology, Albert Einstein College of Medicine, Bronx, NY 10461; and
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Sarah A. Bixler
#Research Department, Biogen Idec, Cambridge, MA 02142
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Christine M. Ambrose
#Research Department, Biogen Idec, Cambridge, MA 02142
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Martin L. Scott
#Research Department, Biogen Idec, Cambridge, MA 02142
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
William Stohl
*Department of Medicine,
‡Division of Rheumatology,
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • Article
  • Figures & Data
  • Info & Metrics
  • PDF
Loading

Abstract

Constitutive overexpression of B cell-activating factor belonging to the TNF family (BAFF) promotes development of systemic lupus erythematosus (SLE), and treatment of SLE mice with BAFF antagonists ameliorates disease. To determine whether SLE can develop de novo in BAFF-deficient hosts, BAFF-deficient New Zealand Mixed (NZM) 2328 (NZM.Baff−/−) mice were generated. In NZM.Baff−/− mice, spleen B cells (including CD5+ B1a and CD5− B1b B cells), germinal centers, Ig-secreting cells, and T cells were reduced in comparison to NZM.Baff+/+ mice. Serum total Ig and autoantibody levels were reduced at 4–6 mo but approached wild-type levels with increasing age, indicating that autoreactive B cells can survive and secrete autoantibodies despite the complete absence of BAFF. At least some of these autoantibodies are nephrophilic in that glomerular deposition of total IgG and IgG1 (but not of IgG2a, IgG2b, or C3) was substantial in NZM.Baff−/− mice by 12–13 mo of age. Despite proliferative glomerulonephritis, highlighted by widespread glomerular hyaline thrombi, being common among NZM.Baff−/− mice by 6–7 mo of age, severe proteinuria and mortality were greatly attenuated. These results demonstrate that the lifelong absence of BAFF does not protect NZM 2328 mice from serological autoimmunity and renal pathology. Nevertheless, the character of the renal pathology is altered, and the mice are largely spared from clinically overt disease (severe proteinuria and premature death). These observations may have profound ramifications for the use of BAFF antagonists in human SLE and related diseases.

B cell-activating factor belonging to the TNF family (BAFF3; also known as BLyS, TALL-1, THANK, TNFSF13B, and zTNF4) is a 285-aa type II transmembrane protein member of the TNF ligand superfamily (1, 2, 3, 4, 5, 6). It is expressed systemically by myeloid lineage cells (1, 2, 3, 5, 7, 8), bone marrow-derived radiation-resistant stromal cells (9), and T cells (10), and it is cleaved at the cell surface by a furin protease to release a soluble, biologically active 17-kDa molecule (1, 7).

The most widely appreciated biologic property of BAFF is its ability to inhibit B cell apoptosis (11, 12, 13, 14, 15, 16, 17). Not surprisingly, administration of exogenous BAFF to mice at the time of immunization enhances Ag-specific Ab production (12). Moreover, repeated administration of BAFF to mice, even without intentional antigenic immunization, results in B cell expansion and polyclonal hypergammaglobulinemia (2). Some of the increased Ig production likely is directed to common environmental (foreign) Ags, but some of the increased Ig production likely is directed to self Ags. Indeed, constitutive overexpression of BAFF in BAFF-transgenic (Tg) nonautoimmune-prone mice often leads to systemic lupus erythematosus (SLE)-like features (elevated circulating titers of multiple autoantibodies and renal Ig deposits) (6, 18, 19) and accelerates development of target-organ (kidney) pathology in autoimmune-prone mice (20).

Even without “artificial” Tg-driven BAFF overexpression, BAFF overexpression is a feature of murine and human SLE. Circulating BAFF levels are elevated in (New Zealand Black (NZB) × New Zealand White (NZW))F1 and MRL-lpr/lpr mice at the time of disease onset (6), and circulating BAFF levels are increased in as many as 50% of SLE patients (21, 22, 23), with BAFF expression correlating with clinical disease activity (24, 25).

The pathogenicity of excessive BAFF production notwithstanding, “normal” expression of BAFF is vital to normal B cell development. Nonautoimmune-prone mice genetically rendered BAFF-deficient display considerable global reductions in mature B2 B cells (with nearly intact numbers of peritoneal B1 B cells and immature bone marrow B cells) and in baseline serum Ig levels and Ig responses to T cell-dependent and T cell-independent Ags (26, 27). The dependence of B cell survival and differentiation on BAFF has therapeutic ramifications as illustrated by the clinical response (decreased disease progression and improved survival) of (NZB × NZW)F1 and MRL-lpr/lpr mice to treatment with BAFF antagonists (6, 28, 29, 30).

Although neutralization of BAFF can ameliorate the severity of established SLE disease, it is not known whether the absence of BAFF can actually prevent de novo onset of disease. Because the survival of autoreactive B cells may be much more dependent upon BAFF than is the survival of nonautoreactive B cells (31, 32), we postulated that the de novo development of autoimmunity in BAFF-deficient hosts would be profoundly attenuated, if not completely eliminated. To address this issue, we used the lupus-prone (NZB × NZW)F1-derived inbred New Zealand Mixed (NZM) 2328 mouse strain whose phenotype closely resembles that of the original F1 mice (33). To our surprise, development of serological autoimmunity in BAFF-deficient NZM 2328 mice was considerable. Substantial end-organ (kidney) pathology also developed in these mice, but it qualitatively differed from that in their BAFF-intact counterparts. Despite the serological autoimmunity and kidney pathology, clinically overt disease (severe proteinuria, premature mortality) in BAFF-deficient hosts was very limited.

Materials and Methods

Mice

All mice were maintained at the University of Southern California (Los Angeles, CA), and the experiments were approved by the Institutional Animal Care and Use Committee. BAFF-deficient (Baff−/−) mice on a B6/129 mixed background (27) were backcrossed into SLE-prone NZM 2328 mice. Introgression of the desired genotype (Baff−/−) into the desired background (NZM 2328) was accelerated by the marker-assisted selection protocol (34, 35) using 47 microsatellite markers. These markers were chosen to include those regions identified as susceptibility loci in NZM 2328 mice (36). The N8 backcross generation (NZM.Baff+/−) was fully congenic. NZM.Baff+/− males and females were crossed, yielding NZM mice that were Baff+/+, Baff+/−, and Baff−/− at the expected 1:2:1 ratio. The Baff gene is located on mouse chromosome 8, ∼10.52 megabases from the top, in a region not considered to be associated with susceptibility to, or resistance from, SLE. Thus, it is unlikely that inadvertent introduction and/or elimination of susceptibility and/or resistance genes had occurred consequent to the introgression. Only female mice were studied.

Detection of Baff genotype

Genomic DNA extracted from mouse tail clippings was PCR-amplified for 25 cycles each at 94°C for 1 min, 65°C for 1.5 min, and 72°C for 1 min. The primer sequences used were: 5′-GCAGATTGAGCAATCCATGGAAGGCCA-3′, 5′-TGGCAGGGTCTTTGCAGACTCATCCAT-3′, 5′-CAAGTTGATGTCCTGACCCAAGGCACC-3′.

The PCR products were subjected to electrophoresis in agarose gels containing ethidium bromide, and bands were visualized under UV light. Band size for the intact Baff gene fragment is 234 bp and for the disrupted Baff gene is 336 bp.

Cell surface staining

Mouse spleen mononuclear cells were stained with combinations of FITC-, PE-, PerCP, allophycocyanin-, and/or CyChrome-conjugated mAb specific for murine CD3, CD4, CD5, CD8, CD11b, CD19, CD21, CD23, CD44, CD45R (B220), CD62L, IgD, or IgM (BD Pharmingen) and analyzed by flow cytometry (37).

Serum Ig and spleen Ig-secreting cells (IgSC) determinations

Sera were assayed for levels of total IgG and total IgM by ELISA (37). Spleen cells were assayed for numbers of total IgSC by the reverse hemolytic plaque assay (38, 39). Each plaque-forming cell was taken as an IgSC.

Serum autoantibody determinations

Sera were assayed for levels of IgG and IgM anti-chromatin, anti-histone, and anti-dsDNA autoantibodies by ELISA (40, 41). Five sera from 36-wk-old (NZB × NZW)F1 mice at a 1/200 dilution were assayed on each plate, and the average OD of these sera for each autoantigen was arbitrarily set at a value of 100. Values for the test sera were calculated as (ODserum/ODcontrol) × 100.

Serum BAFF determination

Serum BAFF levels were determined by a sandwich ELISA. Quantitative values were calculated from a standard curve of known concentrations of recombinant soluble murine BAFF (Biogen Idec). Because there is some batch-to-batch variation in the recombinant soluble murine BAFF used as a standard, the values should be viewed in relative terms rather than in absolute terms. The lower level of detection is 10 ng/ml.

Spleen immunofluorescence

OCT-embedded frozen spleen sections were stained with PE-conjugated anti-CD45R/B220 mAb (BD Biosciences), FITC-conjugated anti-MOMA-1 mAb (Serotec), or Alexa 546-conjugated peanut agglutinin (PNA) (Invitrogen Life Technologies) for 45 min at room temperature and mounted with Fluoromount G (Electron Microscopy Sciences). Stained sections were examined by fluorescence microscopy (Nikon E600).

Assessment of proteinuria

Reagent strips for urinary protein (Albustix; Bayer) were dipped in mouse urine and were assigned a score (0–4) by visual color comparison to the supplied standard color key.

Kidney immunofluorescence

OCT-embedded frozen kidney sections were incubated with FITC-conjugated F(ab)2 of goat anti-mouse IgG γ-chain, FITC-conjugated goat anti-mouse IgG1, IgG2a, or IgG2b isotypes (Jackson ImmunoResearch Laboratories), or goat anti-mouse C3 (MP Biomedicals) followed by FITC-conjugated anti-goat IgG (Jackson ImmunoResearch Laboratories). Stained sections were examined by fluorescence microscopy (Nikon).

Kidney histology

Individual sections of formalin-fixed kidneys were stained with H&E and were examined by light microscopy by one of us (M. N. Koss) who was blinded to the genotype of the mouse. Each case was assessed for glomerulonephritis (GN) using a modification of the World Health Organization classification for lupus nephritis (20). Class I was assigned for normal histology by light microscopy; class II was assigned for increases in mesangial matrix and/or cells; class III was assigned for focal proliferative GN (<50% of glomeruli showing endocapillary proliferative changes with or without crescents); and class IV was assigned for diffuse proliferative GN (>50% of glomeruli showing endocapillary proliferative changes with or without crescents).

Statistical analysis

All analyses were performed using SigmaStat software (SPSS). When necessary, raw results were log transformed to achieve normality and/or to satisfy the equal variance test. Parametric testing between two groups was performed by the t test, and parametric testing among three groups was performed by one-way ANOVA. When log transformation failed to generate normally distributed data or the equal variance test was not satisfied, nonparametric testing was performed by the Mann-Whitney rank sum test between two groups and by Kruskal-Wallis one-way ANOVA on ranks among three groups. Correlations were determined by Pearson product moment correlation for interval data and by Spearman rank order correlation for ordinal data or for interval data which did not follow a normal distribution. Survival data were analyzed by the log rank test with multiple comparisons by the Holm-Sidak method.

Results

Serum BAFF levels in NZM 2328 mice

To confirm that NZM.Baff−/− mice were not “leaky”, serum BAFF levels were measured in a randomly selected group of NZM.Baff+/+, NZM.Baff+/−, and NZM.Baff−/− mice at 2 mo of age. BAFF was not detectable in the serum of any of the NZM.Baff−/− mice, whereas serum BAFF concentrations were readily measurable in the NZM.Baff+/+ and NZM.Baff+/− mice (Fig. 1⇓). BAFF was also not detectable in the sera of a second group of NZM.Baff−/− mice bled at 6–7 mo of age.

           FIGURE 1.
  • Download figure
  • Open in new tab
  • Download powerpoint
FIGURE 1.

Serum levels of BAFF in NZM 2328 mice. Sera from 2-mo-old Baff+/+ (int; n = 2), Baff+/− (het; n = 3), and Baff−/− (def; n = 8) NZM 2328 mice were analyzed for BAFF levels. Sera from a second group of NZM.Baff−/− mice (def II; n = 9) bled at 6–7 mo of age were also analyzed for BAFF levels.

Effect of BAFF deficiency on splenic B cells, IgSC, and T cells in NZM 2328 mice

In nonautoimmune-prone mice (B6/129 mixed background), BAFF deficiency leads to marked reduction in splenic B cells (27). In SLE-prone NZM 2328 mice, BAFF deficiency had a similar effect. The geometric mean spleen B cell number in NZM.Baff−/− mice was reduced by 96 and 92% in comparison with those in NZM.Baff+/+ and NZM.Baff+/− mice, respectively (p < 0.001, Fig. 2⇓A). Similarly, the geometric mean spleen IgSC number in NZM.Baff−/− mice was reduced by 91 and 81% in comparison with those in NZM.Baff+/+ and NZM.Baff+/− mice, respectively (p < 0.001, Fig. 2⇓B). As expected, the correlation between spleen B cells and spleen IgSC across all the congenic NZM 2328 mice was very strong (Fig. 2⇓E).

           FIGURE 2.
  • Download figure
  • Open in new tab
  • Download powerpoint
FIGURE 2.

Spleen B cells, IgSC, and T cells in NZM.Baff+/+, NZM.Baff+/−, and NZM.Baff−/− mice. A–D, Spleens from Baff+/+ (int; n = 8; age 4–8 mo), Baff+/− (het; n = 8; age 11–13 mo), and Baff−/− (def; n = 9; age 12–13 mo) NZM 2328 mice were analyzed for B (B220+) cells (A), IgSC (B), CD4+ cells (C), and CD8+ cells (D). Each symbol represents an individual mouse. The composite results are plotted as box plots. The lines inside the boxes indicate the medians; the outer borders of the boxes indicate the 25th and 75th percentiles; and the bars extending from the boxes indicate the 10th and 90th percentiles. E–G, Correlations among all NZM 2328 mice (Baff+/+, ○; Baff+/−, □; Baff−/−, ⋄) are illustrated for spleen B (B220+) cells vs spleen IgSC (E), spleen B (B220+) cells vs spleen CD4+ cells (F), and spleen B (B220+) cells vs spleen CD8+ cells (G).

In agreement with previous observations in BAFF-deficient nonautoimmune-prone mice (42), CD23 expression was profoundly reduced on B220+ B cells from NZM.Baff−/− mice (Fig. 3⇓). Moreover, staining for surface IgM and IgD established that the mature (IgMlowIgDhigh) B cells were preferentially lost with relative preservation of the immature (IgMhigh) B cells. Immunohistologic analysis of spleen sections (Fig. 4⇓) confirmed the reduction in B220+ cells and documented disruption of the underlying splenic architecture, as illustrated by the altered in situ staining pattern of MOMA-1+ cells. In addition, germinal centers (illustrated by clusters of PNA+ cells) were smaller and fewer in number in NZM.Baff−/− mice, consistent with the effects of BAFF deficiency in nonautoimmune-prone mice (43, 44).

           FIGURE 3.
  • Download figure
  • Open in new tab
  • Download powerpoint
FIGURE 3.

Spleen B cell subsets in NZM.Baff+/+, NZM.Baff+/−, and NZM.Baff−/− mice. Spleen cells from the indicated mice were triple-stained for surface B220, CD21, and CD23 or for surface B220, IgM, and IgD. The histograms (top row) illustrate B220 staining, with the corresponding horizontal bars delimiting the B220+ cells and the numbers indicating the percentages of cells staining positively for B220. The dot plots in the middle row illustrate surface CD21 and CD23 staining for the B220+ cell population. The numbers in these panels indicate the percentages of cells within each quadrant. The dot plots in the bottom row illustrate surface IgM and IgD staining for the B220+ cell population. The numbers in these panels indicate the percentages of cells within each of the boxed regions.

           FIGURE 4.
  • Download figure
  • Open in new tab
  • Download powerpoint
FIGURE 4.

Spleen immunofluorescence in NZM.Baff+/+ (A–C) and NZM.Baff−/− (D–F) mice. Spleen sections from the indicated mice were stained with anti-B220 mAb, MOMA-1, or PNA. Original magnification is ×10.

Peritoneal CD5+ (B1a) B cells remain nearly intact in BAFF-deficient mice bearing a nonautoimmune-prone background (26, 27). Although CD5+ B cells variably comprise ∼5% of splenic B cells in most mouse strains (45), NZB mice harbor an expanded spleen CD5+ B cell population (46). Because the genetic constitution of NZM 2328 mice is partly derived from NZB mice, we assessed additional NZM.Baff+/+ and NZM.Baff−/− mice for spleen CD5+ B cells. CD5+ B cells were markedly expanded in 4-mo-old NZM.Baff+/+ mice (Table I⇓). Most of these cells also expressed high levels of surface IgM, whereas the great majority of the spleen CD5+ B cells were CD11b−. The expansion of CD5+ B cells in the spleens of NZM.Baff+/+ mice is even greater than that previously observed in NZB mice (46), and the percentages of IgM+ cells or CD11b+ cells among spleen CD5+ B cells are consistent with previous observations in nonautoimmune BALB/c mice (47). Very small percentages of B1b-like cells (CD19+CD5−CD11b+IgM+) were also present in the spleens of NZM.Baff+/+ mice. In both age-matched and much older (14–18 mo of age) NZM.Baff−/− mice, the percentages of spleen CD5+ B cells were modestly greater than those in NZM.Baff+/+ mice, but the absolute numbers of all the individual B cell populations in NZM.Baff−/− mice were markedly lower than those in NZM.Baff+/+ mice.

View this table:
  • View inline
  • View popup
Table I.

B1 cells in NZM.Baff+/+ and NZM.Baff−/−micea

Splenic T cells were also reduced in NZM.Baff−/− mice, albeit to a lesser degree than the reductions observed for B cells and IgSC. The geometric mean spleen CD4+ cell number in NZM.Baff−/− mice was reduced by 73 and 66% in comparison with those in NZM.Baff+/+ and NZM.Baff+/− mice, respectively (p < 0.001, Fig. 2⇑C), whereas the geometric mean spleen CD8+ cell number in NZM.Baff−/− mice was reduced by 66 and 48% in comparison with those in NZM.Baff+/+ and NZM.Baff+/− mice, respectively (p < 0.001, Fig. 2⇑D). These reductions are consistent with the modest reductions in spleen CD3+ cells in nonautoimmune-prone BAFF-deficient mice (26). No consistent differences in the activation state (as determined by surface expression of CD44 and CD62L) of either T cell population and no differences in the percentages of CD4+CD25high cells were detected among NZM 2328 mice as a function of Baff genotype (data not shown). Of note, the correlations between spleen B cells and spleen CD4+ or CD8+ cells were strong (Fig. 2⇑, F and G), pointing to a possible interdependence among these cell populations.

Effect of BAFF deficiency on serum total Ig and autoantibody levels in NZM 2328 mice

Consistent with the reduction in spleen B cells and IgSC in NZM.Baff−/− mice, the geometric mean serum total IgG level in NZM.Baff−/− mice at 4–6 mo of age was reduced by 79 and 61% in comparison with those in age-matched NZM.Baff+/+ and NZM.Baff+/− mice, respectively (p < 0.001, Fig. 5⇓A). Remarkably, total IgG levels rose with age in NZM.Baff−/− mice to the point where the overlap in values among the three cohorts was almost total at 7–9 mo of age (Fig. 5⇓B) and where no significant difference was appreciated between NZM.Baff−/− and NZM.Baff+/− mice at 10–13 mo of age (Fig. 5⇓C) (most NZM.Baff+/+ mice were dead by this age, so serum samples from this age group were not available for testing). A similar reduction in serum total IgM levels in NZM.Baff−/− mice at 4–6 mo of age and an equalization of total IgM levels among NZM.Baff+/+, NZM.Baff+/−, and NZM.Baff−/− mice with increasing age were also observed (data not shown).

           FIGURE 5.
  • Download figure
  • Open in new tab
  • Download powerpoint
FIGURE 5.

Serum total IgG and IgG autoantibody levels in NZM.Baff+/+, NZM.Baff+/−, and NZM.Baff−/− mice. Sera from Baff+/+ (int), Baff+/− (het), and Baff−/− (def) NZM 2328 mice were collected from mice aged 4–6 mo (A, D, G, and J), 7–9 mo (B, E, H, and K), or 10–13 mo (C, F, I, and L) and were analyzed for serum levels of total IgG (A–C), IgG anti-chromatin Abs (D–F), IgG anti-histone Abs (G–I), and IgG anti-dsDNA Abs (J–L). The vast majority of NZM.Baff+/+ mice were dead by 10 mo of age, so no sera from 10- to 13-mo-old NZM.Baff+/+ mice were available for testing. Numbers of mice tested: 4–6 mo: int, n = 15; het, n = 12; def, n = 18. 7–9 mo: int, n = 9; het, n = 16; def, n = 27. 10–13 mo: het, n = 6; def, n = 10. Results are presented as in Fig. 2⇑.

Comparable patterns were observed for the tested serum IgG autoantibodies. At 4–6 mo of age, IgG anti-chromatin Ab levels were significantly lower (p < 0.001) in either NZM.Baff+/− or NZM.Baff−/− mice than in NZM.Baff+/+ mice (Fig. 5⇑D). By 7–9 mo of age, IgG anti-chromatin Ab levels in NZM.Baff+/− mice were no longer significantly lower than those in NZM.Baff+/+ mice (Fig. 5⇑E), and by 10–13 mo of age, IgG anti-chromatin Ab levels in NZM.Baff−/− mice were no longer significantly lower than those in NZM.Baff+/− mice (Fig. 5⇑F). For IgG anti-histone Abs, the modest significant decrease (p = 0.002) in serum levels in NZM.Baff+/− or NZM.Baff−/− mice at 4–6 mo relative to those in corresponding NZM.Baff+/+ mice completely disappeared by 7–9 mo of age (Figs. 5⇑, G–I). For IgG anti-dsDNA Abs, serum levels in NZM.Baff+/− mice were not significantly different from those in NZM.Baff−/− mice at any time point (Fig. 5⇑, J–L). Although levels in NZM.Baff+/+ mice were significantly greater than those in NZM.Baff−/− mice at both 4–6 mo and 7–9 mo of age (p < 0.001 and p = 0.002, respectively), they were surpassed in NZM.Baff−/− mice by 10–13 mo of age. The serum IgG autoantibody levels harbored by 10- to 13-mo-old NZM.Baff−/− mice were similar to those harbored by 11- to 22-mo-old BAFF-sufficient nonautoimmune-prone C57BL/6 female mice (n = 7; IgG anti-chromatin 21–98 U/ml; IgG anti-histone 6–30 U/ml; IgG anti-dsDNA 21–148 U/ml). Serum levels of the corresponding IgM autoantibodies in NZM.Baff−/− mice also were similar to those in NZM.Baff+/+ or NZM.Baff+/− mice by 7–9 mo of age (data not shown).

Effect of BAFF deficiency on kidney pathology in NZM 2328 mice

The development, albeit delayed, of serologic autoimmunity in BAFF-deficient NZM 2328 mice raised the possibility that target-organ (kidney) pathology might be substantial in these mice. Immunofluorescence analysis of kidneys from NZM.Baff+/+ mice (6–7 mo of age) demonstrated widespread glomerular deposition of total IgG and C3 (Fig. 6⇓, A and D). In contrast, glomerular total IgG deposition in kidneys from age-matched NZM.Baff−/− mice was greatly reduced, and glomerular C3 deposition was barely discernible (Fig. 6⇓, B and E). In much older NZM.Baff−/− mice (12–13 mo of age), deposition of total IgG had become substantial and was qualitatively similar to that in 6- to 7-mo-old NZM.Baff+/+ mice (Fig. 6⇓C). Nevertheless, deposition of C3 was still barely discernible (Fig. 6⇓F). This dichotomy in old NZM.Baff−/− mice between glomerular total IgG deposition and glomerular C3 deposition may have been due to preferential glomerular deposition of IgG1 (poor at complement fixation) rather than IgG2a or IgG2b (good at complement fixation). Indeed, glomerular IgG1 deposition in old NZM.Baff−/− mice was considerable, whereas glomerular deposition of IgG2a and IgG2b in these mice was very limited (Fig. 6⇓, I, L, and O).

           FIGURE 6.
  • Download figure
  • Open in new tab
  • Download powerpoint
FIGURE 6.

Kidney immunofluorescence in NZM.Baff+/+ and NZM.Baff−/− mice. Sections of fresh-frozen kidneys from a 6-mo-old NZM.Baff+/+ mouse (A, D, G, J, and M), a 7-mo-old NZM.Baff−/− mouse (B, E, H, K, and N), and a 13-mo-old NZM.Baff−/− mouse (C, F, I, L, and O) were stained for total IgG, C3, IgG1, IgG2a, and IgG2b. Original magnification is ×40.

The striking reductions in glomerular IgG2a, IgG2b, and C3 deposition among NZM.Baff−/− mice were associated with less severe kidney pathology. Kidneys from eight NZM.Baff−/− mice 6–7 mo of age and from nine NZM.Baff−/− mice 11–13 mo of age were evaluated histologically. Among the former, one had class IIB GN, three had class III GN, and four had class IV GN (NZM.Baff+/+ mice routinely have class IV GN by 6–7 mo of age). No obvious progression of the renal pathology to the more severe forms (i.e., class IV) was appreciated among the 11- to 13-mo-old NZM.Baff−/− mice, with three having class IIB GN, three having class III GN, and three having class IV GN. Qualitatively, the pathology even among the NZM.Baff−/− mice with class IV GN differed from that in NZM.Baff+/+ mice (Fig. 7⇓). Although endocapillary proliferative changes (black arrows) were observed in both, they were much more extensive in NZM.Baff+/+ mice. The renal disease observed in NZM.Baff−/− mice was more characterized by occasional foci of interstitial nephritis (green arrow), perivascular inflammation (red arrow), and widespread hyaline thrombi (blue arrows), the last of which being virtually undetected in NZM.Baff+/+ mice.

           FIGURE 7.
  • Download figure
  • Open in new tab
  • Download powerpoint
FIGURE 7.

Kidney histology in NZM.Baff+/+ and NZM.Baff−/− mice. Sections of formalin-fixed kidneys from a 8-mo-old NZM.Baff+/+ mouse (A), a 7-mo-old NZM.Baff−/− mouse (B–D), and a 13-mo-old NZM.Baff−/− mouse (E) were stained with H&E. Each of the shown kidneys has class IV disease. The black arrows point to endocapillary proliferation; the green arrow points to a focus of interstitial nephritis; the red arrow points to a focus of perivascular inflammation; and the blue arrows point to hyaline thrombi. Original magnification is ×400 (A, B, and D) and ×200 (C and E).

Effect of BAFF deficiency on clinical disease in NZM 2328 mice

Consistent with previous observations (48), NZM.Baff+/+ mice started developing ≥3+ proteinuria at 5–6 mo of age, with >90% being affected by 10 mo of age. Death followed shortly after development of this severe proteinuria (Fig. 8⇓). Although renal pathology was substantial in NZM.Baff−/− mice, development of severe proteinuria and mortality was markedly attenuated in these mice (p < 0.001 for each in comparison to NZM.Baff+/+ and NZM.Baff+/− mice). Development of severe proteinuria and mortality in NZM.Baff+/− mice was not significantly different from those in NZM.Baff+/+ mice (p = 0.165 and p = 0.128, respectively).

           FIGURE 8.
  • Download figure
  • Open in new tab
  • Download powerpoint
FIGURE 8.

Clinical disease in NZM.Baff+/+, NZM.Baff+/−, and NZM.Baff−/− mice. Cohorts of NZM.Baff+/+ (○; n = 29), NZM.Baff+/− (□; n = 23), and NZM.Baff−/− (⋄; n = 31) mice were monitored for development of severe (≥3+) proteinuria (A) and death (B). Results are plotted as cumulative percentages over time.

Discussion

In nonautoimmune-prone mice (B6/129 mixed background), lifelong absence of BAFF results in profound reductions in total B cells (preferentially affecting mature B cells) and in circulating Ig (27). NZM 2328 mice, despite their strong underlying autoimmune diathesis, also displayed profound lifelong reductions in total B cells (preferentially affecting mature (IgDhigh) B cells) and spleen IgSC in response to lifelong BAFF deficiency (Figs. 2⇑, A and B, and 3⇑). Splenic architecture was altered and expression of B cell surface CD23 was markedly diminished in NZM.Baff−/− mice in comparison to NZM.Baff+/+ mice as were the numbers and size of spleen germinal centers (Figs. 3⇑ and 4⇑), similar to observations made in nonautoimmune-prone BAFF-deficient mice (42, 43, 44).

Whereas BAFF-deficient NZM 2328 mice recapitulated many B cell phenotypic features of BAFF-deficient nonautoimmune-prone mice, there was one apparent exception. CD5+ B cells were markedly expanded in NZM 2328 mice, with >50% of spleen B cells expressing both CD19 and CD5 (Table I⇑). However, whereas the absolute numbers of CD5+ (B1a) B cells remain nearly intact in nonautoimmune-prone BAFF-deficient mice (26, 27), the absolute numbers of such cells (along with CD5− B1b cells) were markedly reduced in NZM.Baff−/− mice compared with those in NZM.Baff+/+ mice. It must be stressed that very few CD5+ B cells are present in the spleens of most mouse strains, so reductions in spleen CD5+ B cells would be difficult to perceive. That is, previous reports claiming BAFF independence by B1 cells may have been overstated, and absence of BAFF even in nonautoimmune-prone mice may severely affect total CD5+ B cell number. Nevertheless, the possibility remains that the contribution of BAFF to the maintenance of discrete B cell populations may differ in an autoimmune-prone host from that in a nonautoimmune-prone host. The precise specificities and contributions to autoimmunity of the expanded individual CD5+ B cell subsets as well as those of CD5− B1b cells in NZM.Baff+/+ and NZM.Baff−/− mice will require further experimental elucidation.

BAFF-deficient NZM 2328 mice also displayed reductions in CD4+ and CD8+ cells (Fig. 2⇑, C and D), albeit not as dramatic as the reductions in B cells and IgSC. Neither the T cell activation state (as determined by surface expression of CD44 and CD62L) nor the percentages of CD4+CD25high cells differed among NZM 2328 mice as a function of Baff genotype (data not shown). The strong correlations between spleen B cell and T cell numbers (Fig. 2⇑, F and G) suggests their possible coordinate regulation. Although the three BAFF receptors (B cell maturation Ag (BCMA), transmembrane activator and calcium modulator and cyclophilin ligand interactor (TACI), BAFFR/BR3) are predominantly expressed by B cells (49, 50, 51, 52), some T cells express TACI and/or BAFFR (50, 53, 54) and can be costimulated by BAFF (10, 54, 55). Thus, the absence of BAFF-mediated trophic effects on B cells and T cells in NZM.Baff−/− mice could have led to parallel reductions in both. Alternatively, decreased numbers of B cells, with the attendant reduction in net B cell APC function, may have resulted in a secondary decrease in T cells.

In accord with the profound diminution in B cells, serum total Ig and autoantibody levels were significantly reduced in NZM.Baff−/− mice relative to those in age-matched NZM.Baff+/+ mice through ∼6 mo of age. With increasing age, however, serum total Ig and autoantibody levels in NZM.Baff−/− mice continued to rise to the point where the overlap in values among NZM.Baff+/+, NZM.Baff+/−, and NZM.Baff−/− mice was considerable (Fig. 5⇑, and data not shown). This increase occurred despite the profound persistent decrease in spleen IgSC in NZM.Baff−/− mice (Fig. 2⇑B), indicating that nonspleen IgSC (e.g., bone marrow IgSC) had greatly increased in number and/or that Ig secreting by each IgSC had increased in a BAFF-independent manner. The serum levels of IgG autoantibodies in 10- to 13-mo-old NZM.Baff−/− mice were similar to those in 11- to 22-mo-old BAFF-sufficient C57BL/6 mice, raising the possibility that development of serological autoimmunity with age in BAFF-sufficient hosts may have a BAFF-independent component. In any case, the identity of the BAFF-independent factor(s) that promoted B cell survival and differentiation in NZM.Baff−/− mice remains speculative but may have involved overexpression of Bcl-2 and/or Bcl-xL. Plasmablasts that overexpress Bcl-2 are resistant to the proapoptotic effects of BAFF neutralization (56), and overexpression of Bcl-2 or Bcl-xL can reverse the B cell-depleting effects of BAFF or BAFFR deficiency (57, 58, 59, 60).

Alternatively, a proliferation-inducing ligand (APRIL) may have been playing a critical role in promoting autoimmunity in NZM.Baff−/− mice. Although APRIL does not bind to BAFFR (51, 52), APRIL does bind to the other two BAFF receptors, BCMA and TACI (61, 62, 63, 64). Engagement of either receptor by APRIL could facilitate development and/or maintenance of an autoimmune state. BCMA likely plays an important role in survival of long-lived plasma cells (65) and may play an important role in augmenting B cell APC function (66). TACI, in addition to its role in promoting T cell-independent responses (67, 68), is likely involved in Ig class switching (69) as is APRIL (70). APRIL-deficient mice manifest impaired Ig class switching (71), so APRIL/TACI interactions may have been vital to development of IgG autoantibodies in BAFF-deficient NZM 2328 mice. Indeed, Ag-specific Ab responses are enhanced in APRIL-Tg mice (72), so APRIL may readily promote autoantigen-specific Ab responses in autoimmune-prone hosts.

Based on studies in hen egg lysozyme (HEL)/anti-HEL double-Tg mice, it has been suggested that survival of autoreactive B cells is more dependent upon BAFF than is survival of nonautoreactive B cells (31, 32). The observed steady rise in serum IgG autoantibody levels with age in NZM.Baff−/− mice does not necessarily refute this view. Nevertheless, it does convincingly demonstrate that, despite the complete absence of BAFF, autoreactive B cells can survive in an autoimmune-prone (NZM 2328) environment and differentiate into IgG autoantibody-secreting cells. Although BAFF may preferentially promote survival of autoreactive B cells, BAFF is clearly not indispensable for the development of autoimmunity per se.

At least some of the autoantibodies that can emerge in a BAFF-deficient environment are nephrophilic, since glomerular IgG deposition developed in NZM.Baff−/− mice, albeit with delayed kinetics relative to development of glomerular IgG deposition in NZM.Baff+/+ mice (Fig. 6⇑). Although glomerular IgG deposition was minimal in 6- to 7-mo-old NZM.Baff−/− mice, glomerular IgG deposition in these mice was considerable by 12–13 mo of age. Nevertheless, glomerular C3 deposition was barely detectable among NZM.Baff−/− mice at any age, even in 13-mo-old mice. This likely reflects the preferential deposition of IgG1, a poor fixator of complement, rather than IgG2a or IgG2b, good fixators of complement, in the glomeruli. This last observation suggests that BAFF deficiency alters the isotypic distribution of nephrophilic autoantibodies. This alteration may be consequent to the loss of BAFF-driven Ig class switching (70, 73, 74) and/or to a general polarization of the immune response away from a Th1 pattern to a Th2 pattern (75).

Kidney pathology frequently developed in NZM.Baff−/− mice by 6–7 mo of age, with class IV GN being present in >30% of these mice (Fig. 7⇑). Nevertheless, there were clear-cut qualitative differences between the class IV GN in NZM.Baff−/− mice and the class IV GN in NZM.Baff+/+ mice. Most striking were the greater degree of endocapillary proliferation in the latter compared with that in the former and the widespread hyaline thrombi in the former which were very rare in the latter (both types of pathology are seen in human lupus nephritis, although the extensive nature of the hyaline thrombi seen in NZM.Baff−/− mice may outstrip that seen in human disease).

In addition to any role having been played by the delay in IgG deposition and the near absence of C3 deposition in the glomeruli, the alteration in renal pathology in NZM.Baff−/− mice may have been related to the substantial, albeit incomplete, depletion of B cells per se in a BAFF-deficient environment. MRL-lpr/lpr mice completely deficient in B cells do not display heightened T cell activation (76), and, in the absence of B cells, neither MRL-lpr/lpr nor NZM 2328 mice develop disease at all (Ref. 77 and C. O. Jacob, unpublished observations). However, MRL-lpr/lpr mice that bear B cells but whose B cells are incapable of secreting Ig (including autoantibodies) do develop heightened T cell activation and do develop disease, but the disease is attenuated relative to that in wild-type MRL-lpr/lpr mice (78). How much of the altered renal pathology in NZM.Baff−/− mice is consequent to the reduction in glomerular IgG deposition and/or absence of glomerular C3 deposition and how much is due to the reduction in B cell number and attendant autoantibody-independent B cell APC function remains to be determined through future investigation.

In any case, the alteration in kidney pathology is likely directly responsible for the considerable delay and attenuation of severe proteinuria and mortality (Fig. 8⇑). The paradox of little clinical renal disease in the face of substantial renal pathology in NZM.Baff−/− mice may help explain the initial results from clinical trials in human SLE with BAFF antagonists. Belimumab, an anti-human BAFF mAb (79), was shown in a double-blind, placebo-controlled phase-I trial in SLE to be safe and biologically active (80). No clinical efficacy was demonstrated, although the small number of patients and very short treatment schedules and follow-up period likely precluded demonstration of clinical benefit. In a more recent 52-wk, double-blind, placebo-controlled phase-II trial in SLE, treatment with belimumab failed to meet its coprimary endpoints when the entire SLE cohort was considered. Nevertheless, clinical efficacy was demonstrable in the 75% of patients who were “seropositive” (〈www.hgsi.com/news/press/05–10-05_LSB_Phase_2_Results.htm〉). It may be that BAFF antagonism does not fully reverse or eliminate underlying pathology, but in “seropositive” SLE patients as in “seropositive” NZM 2328 mice, neutralization (elimination) of BAFF leads to substantial clinical improvement by an as-yet-undetermined mechanism. Clinical trials with other BAFF antagonists, including TACI-Ig and BR3-Fc, are also currently under way. The full therapeutic use and extent of BAFF antagonism in the management of patients with SLE and related diseases remain to be elucidated, with our observations in NZM.Baff−/− mice demonstrating that humoral autoimmunity, kidney pathology, and clinical outcome may be dissociated one from the other.

Acknowledgments

We thank Hal Soucier for performing the flow cytometry, the University of Southern California/Norris Comprehensive Cancer Center Histology Service for processing the tissue samples, Dr. Todd Morgan for supplying sera from old C57BL/6 mice, and Dr. Susan Kalled for review of this manuscript.

Disclosures

S. A. Bixler, C. M. Ambrose, and M. L. Scott were all employees of Biogen Idec at the time of this work.

Footnotes

  • The costs of publication of this article were defrayed in part by the payment of page charges. This article must therefore be hereby marked advertisement in accordance with 18 U.S.C. Section 1734 solely to indicate this fact.

  • ↵1 This work was supported in part by National Institutes of Health Grants R01 AI057473 (to C.O.J.), R01 AR049765 (to L.P.), R01 AR050193 (to W.S.), and R01 AR048692 and P01 AI051392 (to C.P.), a Lupus Research Institute Award (to L.P.), a Target Identification in Lupus Award from the Alliance for Lupus Research/Arthritis Foundation (to C.P.), a Hulda Irene Duggan Arthritis Investigator Award from the Arthritis Foundation (to C.P.), an Arthritis Foundation Southern California Chapter Award (to W.S.), and a grant from the Robert E. and May R. Wright Foundation (to W.S.).

  • ↵2 Address correspondence and reprint requests to Dr. William Stohl, Division of Rheumatology, University of Southern California, 2011 Zonal Avenue, HMR 711, Los Angeles, CA 90033. E-mail address: stohl{at}usc.edu

  • ↵3 Abbreviations used in this paper: BAFF, B cell activating factor belonging to the TNF family; Tg, transgenic; SLE, systemic lupus erythematosus; NZB, New Zealand Black; NZW, New Zealand White; NZM, New Zealand Mixed; IgSC, Ig-secreting cell; PNA, peanut agglutinin; GN, glomerulonephritis; HEL, hen egg lysozyme; BCMA, B cell maturation Ag; TACI, transmembrane activator and calcium modulator and cyclophilin ligand interactor; APRIL, a proliferation-inducing ligand.

  • Received March 8, 2006.
  • Accepted May 25, 2006.
  • Copyright © 2006 by The American Association of Immunologists

References

  1. ↵
    Schneider, P., F. MacKay, V. Steiner, K. Hofmann, J.-L. Bodmer, N. Holler, C. Ambrose, P. Lawton, S. Bixler, H. Acha-Orbea, et al 1999. BAFF, a novel ligand of the tumor necrosis factor family, stimulates B cell growth. J. Exp. Med. 189: 1747-1756.
    OpenUrlAbstract/FREE Full Text
  2. ↵
    Moore, P. A., O. Belvedere, A. Orr, K. Pieri, D. W. LaFleur, P. Feng, D. Soppet, M. Charters, R. Gentz, D. Parmelee, et al 1999. BLyS: member of the tumor necrosis factor family and B lymphocyte stimulator. Science 285: 260-263.
    OpenUrlAbstract/FREE Full Text
  3. ↵
    Shu, H.-B., W.-H. Hu, H. Johnson. 1999. TALL-1 is a novel member of the TNF family that is down-regulated by mitogens. J. Leukocyte Biol. 65: 680-683.
    OpenUrlAbstract
  4. ↵
    Mukhopadhyay, A., J. Ni, Y. Zhai, G.-L. Yu, B. B. Aggarwal. 1999. Identification and characterization of a novel cytokine: THANK, a TNF homologue that activates apoptosis, nuclear factor-κB, and c-Jun NH2-terminal kinase. J. Biol. Chem. 274: 15978-15981.
    OpenUrlAbstract/FREE Full Text
  5. ↵
    Tribouley, C., M. Wallroth, V. Chan, X. Paliard, E. Fang, G. Lamson, D. Pot, J. Escobedo, L. T. Williams. 1999. Characterization of a new member of the TNF family expressed on antigen presenting cells. Biol. Chem. 380: 1443-1447.
    OpenUrlCrossRefPubMed
  6. ↵
    Gross, J. A., J. Johnston, S. Mudri, R. Enselman, S. R. Dillon, K. Madden, W. Xu, J. Parrish-Novak, D. Foster, C. Lofton-Day, et al 2000. TACI and BCMA are receptors for a TNF homologue implicated in B-cell autoimmune disease. Nature 404: 995-999.
    OpenUrlCrossRefPubMed
  7. ↵
    Nardelli, B., O. Belvedere, V. Roschke, P. A. Moore, H. S. Olsen, T. S. Migone, S. Sosnovtseva, J. A. Carrell, P. Feng, J. G. Giri, et al 2001. Synthesis and release of B-lymphocyte stimulator from myeloid cells. Blood 97: 198-194.
    OpenUrl
  8. ↵
    Scapini, P., B. Nardelli, G. Nadali, F. Calzetti, G. Pizzolo, C. Montecucco, M. A. Cassatella. 2003. G-CSF-stimulated neutrophils are a prominent source of functional BLyS. J. Exp. Med. 197: 297-302.
    OpenUrlAbstract/FREE Full Text
  9. ↵
    Gorelik, L., K. Gilbride, M. Dobles, S. L. Kalled, D. Zandman, M. L. Scott. 2003. Normal B cell homeostasis requires B cell activation factor production by radiation-resistant cells. J. Exp. Med. 198: 937-945.
    OpenUrlAbstract/FREE Full Text
  10. ↵
    Huard, B., L. Arlettaz, C. Ambrose, V. Kindler, D. Mauri, E. Roosnek, J. Tschopp, P. Schneider, L. E. French. 2004. BAFF production by antigen-presenting cells provides T cell co-stimulation. Int. Immunol. 16: 467-475.
    OpenUrlAbstract/FREE Full Text
  11. ↵
    Thompson, J. S., P. Schneider, S. L. Kalled, L. Wang, E. A. Lefevre, T. G. Cachero, F. MacKay, S. A. Bixler, M. Zafari, Z.-Y. Liu, et al 2000. BAFF binds to the tumor necrosis factor receptor-like molecule B cell maturation antigen and is important for maintaining the peripheral B cell population. J. Exp. Med. 192: 129-135.
    OpenUrlAbstract/FREE Full Text
  12. ↵
    Do, R. K. G., E. Hatada, H. Lee, M. R. Tourigny, D. Hilbert, S. Chen-Kiang. 2000. Attenuation of apoptosis underlies B lymphocyte stimulator enhancement of humoral immune response. J. Exp. Med. 192: 953-964.
    OpenUrlAbstract/FREE Full Text
  13. ↵
    Batten, M., J. Groom, T. G. Cachero, F. Qian, P. Schneider, J. Tschopp, J. L. Browning, F. Mackay. 2000. BAFF mediates survival of peripheral immature B lymphocytes. J. Exp. Med. 192: 1453-1465.
    OpenUrlAbstract/FREE Full Text
  14. ↵
    Harless, S. M., V. M. Lentz, A. P. Sah, B. L. Hsu, K. Clise-Dwyer, D. M. Hilbert, C. E. Hayes, M. P. Cancro. 2001. Competition for BLyS-mediated signaling through Bcmd/BR3 regulates peripheral B lymphocyte numbers. Curr. Biol. 11: 1986-1989.
    OpenUrlCrossRefPubMed
  15. ↵
    Hsu, B. L., S. M. Harless, R. C. Lindsley, D. M. Hilbert, M. P. Cancro. 2002. Cutting edge: BLyS enables survival of transitional and mature B cells through distinct mediators. J. Immunol. 168: 5993-5996.
    OpenUrlAbstract/FREE Full Text
  16. ↵
    Avery, D. T., S. L. Kalled, J. I. Ellyard, C. Ambrose, S. A. Bixler, M. Thien, R. Brink, F. Mackay, P. D. Hodgkin, S. G. Tangye. 2003. BAFF selectively enhances the survival of plasmablasts generated from human memory B cells. J. Clin. Invest. 112: 286-297.
    OpenUrlCrossRefPubMed
  17. ↵
    Hatada, E. N., R. K. G. Do, A. Orlofsky, H.-C. Liou, M. Prystowsky, I. C. M. MacLennan, J. Caamano, S. Chen-Kiang. 2003. NF-κB1 p50 is required for BLyS attenuation of apoptosis but dispensable for processing of NF-κB2 p100 to p52 in quiescent mature B cells. J. Immunol. 171: 761-768.
    OpenUrlAbstract/FREE Full Text
  18. ↵
    Mackay, F., S. A. Woodcock, P. Lawton, C. Ambrose, M. Baetscher, P. Schneider, J. Tschopp, J. L. Browning. 1999. Mice transgenic for BAFF develop lymphocytic disorders along with autoimmune manifestations. J. Exp. Med. 190: 1697-1710.
    OpenUrlAbstract/FREE Full Text
  19. ↵
    Khare, S. D., I. Sarosi, X.-Z. Xia, S. McCabe, K. Miner, I. Solovyev, N. Hawkins, M. Kelley, D. Chang, G. Van, et al 2000. Severe B cell hyperplasia and autoimmune disease in TALL-1 transgenic mice. Proc. Natl. Acad. Sci. USA 97: 3370-3375.
    OpenUrlAbstract/FREE Full Text
  20. ↵
    Stohl, W., D. Xu, K. S. Kim, M. N. Koss, T. N. Jorgensen, B. Deocharan, T. E. Metzger, S. A. Bixler, Y. S. Hong, C. M. Ambrose, et al 2005. BAFF overexpression and accelerated glomerular disease in mice with an incomplete genetic predisposition to systemic lupus erythematosus. Arthritis Rheum. 52: 2080-2091.
    OpenUrlCrossRefPubMed
  21. ↵
    Zhang, J., V. Roschke, K. P. Baker, Z. Wang, G. S. Alarcón, B. J. Fessler, H. Bastian, R. P. Kimberly, T. Zhou. 2001. Cutting edge: a role for B lymphocyte stimulator in systemic lupus erythematosus. J. Immunol. 166: 6-10.
    OpenUrlAbstract/FREE Full Text
  22. ↵
    Cheema, G. S., V. Roschke, D. M. Hilbert, W. Stohl. 2001. Elevated serum B lymphocyte stimulator levels in patients with systemic immune-based rheumatic diseases. Arthritis Rheum. 44: 1313-1319.
    OpenUrlCrossRefPubMed
  23. ↵
    Stohl, W., S. Metyas, S.-M. Tan, G. S. Cheema, B. Oamar, D. Xu, V. Roschke, Y. Wu, K. P. Baker, D. M. Hilbert. 2003. B lymphocyte stimulator overexpression in patients with systemic lupus erythematosus: longitudinal observations. Arthritis Rheum. 48: 3475-3486.
    OpenUrlCrossRefPubMed
  24. ↵
    Petri, M., W. Stohl, W. Chatham, W. McCune, M. Chevrier, Y.-L. Shen, J. Zhong, A. Orr, L. Hall, W. Freimuth. 2004. Association of BLyS™ with measures of disease activity in a prospective SLE observational study. Arthritis Rheum. 50: S603
    OpenUrl
  25. ↵
    Collins, C. E., A. L. Gavin, T.-S. Migone, D. M. Hilbert, D. Nemazee, W. Stohl. 2006. B lymphocyte stimulator (BLyS) isoforms in systemic lupus erythematosus: disease activity correlates better with blood leukocyte BLyS mRNA levels than with plasma BLyS protein levels. Arthritis Res. Ther. 8: R6
    OpenUrlCrossRefPubMed
  26. ↵
    Gross, J. A., S. R. Dillon, S. Mudri, J. Johnston, A. Littau, R. Roque, M. Rixon, O. Schou, K. P. Foley, H. Haugen, et al 2001. TACI-Ig neutralizes molecules critical for B cell development and autoimmune disease: impaired B cell maturation in mice lacking BLyS. Immunity 15: 289-302.
    OpenUrlCrossRefPubMed
  27. ↵
    Schiemann, B., J. L. Gommerman, K. Vora, T. G. Cachero, S. Shulga-Morskaya, M. Dobles, E. Frew, M. L. Scott. 2001. An essential role for BAFF in the normal development of B cells through a BCMA-independent pathway. Science 293: 2111-2114.
    OpenUrlAbstract/FREE Full Text
  28. ↵
    Kayagaki, N., M. Yan, D. Seshasayee, H. Wang, W. Lee, D. M. French, I. S. Grewal, A. G. Cochran, N. C. Gordon, J. Yin, et al 2002. BAFF/BLyS receptor 3 binds the B cell survival factor BAFF ligand through a discrete surface loop and promotes processing of NF-κB2. Immunity 10: 515-524.
    OpenUrl
  29. ↵
    Ramanujam, M., X. Wang, W. Huang, L. Schiffer, C. Grimaldi, A. Akkerman, B. Diamond, M. P. Madaio, A. Davidson. 2004. Mechanism of action of transmembrane activator and calcium modulator ligand interactor-Ig in murine systemic lupus erythematosus. J. Immunol. 173: 3524-3534.
    OpenUrlAbstract/FREE Full Text
  30. ↵
    Ramanujam, M., X. Wang, W. Huang, Z. Liu, L. Schiffer, H. Tao, D. Frank, J. Rice, B. Diamond, K. O. A. Yu, et al 2006. Similarities and differences between selective and nonselective BAFF blockade in murine SLE. J. Clin. Invest. 116: 724-734.
    OpenUrlCrossRefPubMed
  31. ↵
    Lesley, R., Y. Xu, S. L. Kalled, D. M. Hess, S. R. Schwab, H.-B. Shu, J. G. Cyster. 2004. Reduced competitiveness of autoantigen-engaged B cells due to increased dependence on BAFF. Immunity 20: 441-453.
    OpenUrlCrossRefPubMed
  32. ↵
    Thien, M., T. G. Phan, S. Gardam, M. Amesbury, A. Basten, F. Mackay, R. Brink. 2004. Excess BAFF rescues self-reactive B cells from peripheral deletion and allows them to enter forbidden follicular and marginal zone niches. Immunity 20: 785-798.
    OpenUrlCrossRefPubMed
  33. ↵
    Rudofsky, U. H., B. D. Evans, S. L. Balaban, V. D. Mottironi, A. E. Gabrielsen. 1993. Differences in expression of lupus nephritis in New Zealand mixed H-2z homozygous inbred strains of mice derived from New Zealand Black and New Zealand White mice: origins and initial characterization. Lab. Invest. 68: 419-426.
    OpenUrlPubMed
  34. ↵
    Morel, L., Y. Yu, K. R. Blenman, R. A. Caldwell, E. K. Wakeland. 1996. Production of congenic mouse strains carrying genomic intervals containing SLE-susceptibility genes derived from the SLE-prone NZM2410 strain. Mamm. Genome 7: 335-339.
    OpenUrlCrossRefPubMed
  35. ↵
    Markel, P., P. Shu, C. Ebeling, G. A. Carlson, D. L. Nagle, J. S. Smutko, K. J. Moore. 1997. Theoretical and empirical issue for marker-assisted breeding of congenic mouse strains. Nat. Genet. 17: 280-284.
    OpenUrlCrossRefPubMed
  36. ↵
    Waters, S. T., S. M. Fu, F. Gaskin, U. S. Deshmukh, S.-S. J. Sung, C. C. Kannapell, K. S. K. Tung, S. B. McEwen, M. DcDuffie. 2001. NZM2328: a new mouse model of systemic lupus erythematosus with unique genetic susceptibility loci. Clin. Immunol. 100: 372-383.
    OpenUrlCrossRefPubMed
  37. ↵
    Stohl, W., D. Xu, K. S. Kim, C. S. David, J. P. Allison. 2004. MHC class II-independent and -dependent T cell expansion and B cell hyperactivity in vivo in mice deficient in CD152 (CTLA-4). Int. Immunol. 16: 895-904.
    OpenUrlAbstract/FREE Full Text
  38. ↵
    Stohl, W., D. N. Posnett, N. Chiorazzi. 1987. Induction of T cell-dependent B cell differentiation by anti-CD3 monoclonal antibodies. J. Immunol. 138: 1667-1673.
    OpenUrlAbstract/FREE Full Text
  39. ↵
    Gronowicz, E., A. Coutinho, F. Melchers. 1976. A plaque assay for all cells secreting Ig of a given type or class. Eur. J. Immunol. 6: 588-590.
    OpenUrlCrossRefPubMed
  40. ↵
    Beger, E., B. Deocharan, M. Edelman, B. Erblich, Y. Gu, C. Putterman. 2002. A peptide DNA surrogate accelerates autoimmune manifestations and nephritis in lupus-prone mice. J. Immunol. 168: 3617-3626.
    OpenUrlAbstract/FREE Full Text
  41. ↵
    Deocharan, B., P. Marambio, M. Edelman, C. Putterman. 2003. Differential effects of interleukin-4 in peptide induced autoimmunity. Clin. Immunol. 108: 80-88.
    OpenUrlCrossRefPubMed
  42. ↵
    Gorelik, L., A. H. Cutler, G. Thill, S. D. Miklasz, D. E. Shea, C. Ambrose, S. A. Bixler, L. Su, M. L. Scott, S. L. Kalled. 2004. Cutting edge: BAFF regulates CD21/35 and CD23 expression independent of its B cell survival function. J. Immunol. 172: 762-766.
    OpenUrlAbstract/FREE Full Text
  43. ↵
    Vora, K. A., L. C. Wang, S. P. Rao, Z.-Y. Liu, G. R. Majeau, A. H. Cutler, P. S. Hochman, M. L. Scott, S. L. Kalled. 2003. Cutting edge: germinal centers formed in the absence of B cell-activating factor belonging to the TNF family exhibit impaired maturation and function. J. Immunol. 171: 547-551.
    OpenUrlAbstract/FREE Full Text
  44. ↵
    Rahman, Z. S. M., S. P. Rao, S. L. Kalled, T. Manser. 2003. Normal induction but attenuated progression of geminal center responses in BAFF and BAFF-R signaling-deficient mice. J. Exp. Med. 198: 1157-1169.
    OpenUrlAbstract/FREE Full Text
  45. ↵
    Berland, R., H. H. Wortis. 2002. Origins and functions of B-1 cells with notes on the role of CD5. Annu. Rev. Immunol. 20: 253-300.
    OpenUrlCrossRefPubMed
  46. ↵
    Wither, J. E., C. Loh, G. Lajoie, S. Heinrichs, Y.-C. Cai, G. Bonventi, R. MacLeod. 2005. Colocalization of expansion of the splenic marginal zone population with abnormal B cell activation and autoantibody production in B6 mice with an introgressed New Zealand Black chromosome 13 interval. J. Immunol. 175: 4309-4319.
    OpenUrlAbstract/FREE Full Text
  47. ↵
    Tumang, J. R., W. D. Hastings, C. Bai, T. L. Rothstein. 2004. Peritoneal and splenic B-1 cells are separable by phenotypic, functional, and transcriptomic characteristics. Eur. J. Immunol. 34: 2158-2167.
    OpenUrlCrossRefPubMed
  48. ↵
    Jacob, C. O., S. Zang, L. Li, V. Ciobanu, F. Quismorio, A. Mazutani, M. Satoh, M. Koss. 2003. Pivotal role of Stat4 and Stat6 in the pathogenesis of the lupus-like disease in the New Zealand Mixed 2328 mice. J. Immunol. 171: 1564-1571.
    OpenUrlAbstract/FREE Full Text
  49. ↵
    Laabi, Y., M.-P. Gras, J.-C. Brouet, R. Berger, C.-J. Larsen, A. Tsapis. 1994. The BCMA gene, preferentially expressed during B lymphoid maturation, is bidirectionally transcribed. Nucleic Acids Res. 22: 1147-1154.
    OpenUrlAbstract/FREE Full Text
  50. ↵
    von Bülow, G.-U., R. J. Bran. 1997. NF-AT activation induced by a CAML-interacting member of the tumor necrosis factor receptor superfamily. Science 278: 138-141.
    OpenUrlAbstract/FREE Full Text
  51. ↵
    Thompson, J. S., S. A. Bixler, F. Qian, K. Vora, M. L. Scott, T. G. Cachero, C. Hession, P. Schneider, I. D. Sizing, C. Mullen, et al 2001. BAFF-R, a novel TNF receptor that specifically interacts with BAFF. Science 293: 2108-2111.
    OpenUrlAbstract/FREE Full Text
  52. ↵
    Yan, M., J. R. Brady, B. Chan, W. P. Lee, B. Hsu, S. Harless, M. Cancro, I. S. Grewal, V. M. Dixit. 2001. Identification of a novel receptor for B lymphocyte stimulator that is mutated in a mouse strain with severe B cell deficiency. Curr. Biol. 11: 1547-1552.
    OpenUrlCrossRefPubMed
  53. ↵
    Ye, Q., L. Wang, A. D. Wells, R. Tao, R. Han, A. Davidson, M. L. Scott, W. W. Hancock. 2004. BAFF binding to T cell-expressed BAFF-R costimulates T cell proliferation and alloresponses. Eur. J. Immunol. 34: 2750-2759.
    OpenUrlCrossRefPubMed
  54. ↵
    Ng, L. G., A. P. R. Sutherland, R. Newton, F. Qian, T. G. Cachero, M. L. Scott, J. S. Thompson, J. Wheway, T. Chtanova, J. Groom, et al 2004. B cell-activating factor belonging to the TNF family (BAFF)-R is the principal BAFF receptor facilitating BAFF costimulation of circulating T and B cells. J. Immunol. 173: 807-817.
    OpenUrlAbstract/FREE Full Text
  55. ↵
    Huard, B., P. Schneider, D. Mauri, J. Tschopp, L. E. French. 2001. T cell costimulation by the TNF ligand BAFF. J. Immunol. 167: 6225-6231.
    OpenUrlAbstract/FREE Full Text
  56. ↵
    Balázs, M., F. Martin, T. Zhou, J. F. Kearney. 2002. Blood dendritic cells interact with splenic marginal zone B cells to initiate T-independent immune responses. Immunity 17: 341-352.
    OpenUrlCrossRefPubMed
  57. ↵
    Amanna, I. J., J. P. Dingwall, C. E. Hayes. 2003. Enforced bcl-xL gene expression restored splenic B lymphocyte development in BAFF-R mutant mice. J. Immunol. 170: 4593-4600.
    OpenUrlAbstract/FREE Full Text
  58. ↵
    Tardivel, A., A. Tinel, S. Lens, Q.-G. Steiner, E. Sauberli, A. Wilson, F. Mackay, A. G. Rolink, F. Beermann, J. Tschopp, et al 2004. The anti-apoptotic factor Bcl-2 can functionally substitute for the B cell survival but not for the marginal zone B cell differentiation activity of BAFF. Eur. J. Immunol. 34: 509-518.
    OpenUrlCrossRefPubMed
  59. ↵
    Sasaki, Y., S. Casola, J. L. Kutok, K. Rajewski, M. Schmidt-Supprian. 2004. TNF family member B cell-activating factor (BAFF) receptor-dependent and -independent roles for BAFF in B cell physiology. J. Immunol. 173: 2245-2252.
    OpenUrlAbstract/FREE Full Text
  60. ↵
    Rahman, Z. A. M., T. Manser. 2004. B cells expressing Bcl-2 and a signaling-impaired BAFF-specific receptor fail to mature and are deficient in the formation of lymphoid follicles and germinal centers. J. Immunol. 173: 6179-6188.
    OpenUrlAbstract/FREE Full Text
  61. ↵
    Marsters, S. A., M. Yan, R. M. Pitti, P. E. Haas, V. M. Dixit, A. Ashkenazi. 2000. Interaction of the TNF homologues BLyS and APRIL with the receptor homologues BCMA and TACI. Curr. Biol. 10: 785-788.
    OpenUrlCrossRefPubMed
  62. ↵
    Yu, G., T. Boone, J. Delaney, N. Hawkins, M. Kelley, M. Ramakrishnan, S. McCabe, W.-R Qiu, M. Kornuc, X.-Z. Xia, et al 2000. APRIL and TALL-1 and receptors BCMA and TACI: system for regulating humoral immunity. Nat. Immunol. 1: 252-256.
    OpenUrlCrossRefPubMed
  63. ↵
    Wu, Y., D. Bressette, J. A. Carrell, T. Kaufman, P. Feng, K. Taylor, Y. Gan, Y. H. Cho, A. D. Garcia, E. Gollatz, et al 2000. Tumor necrosis factor (TNF) receptor superfamily member TACI is a high affinity receptor for TNF family members APRIL and BLyS. J. Biol. Chem. 275: 35478-35485.
    OpenUrlAbstract/FREE Full Text
  64. ↵
    Rennert, P., P. Schneider, T. G. Cachero, J. Thompson, L. Trabach, S. Hertig, N. Holler, F. Qian, C. Mullen, K. Strauch, et al 2000. A soluble form of B cell maturation antigen, a receptor for the tumor necrosis factor family member APRIL, inhibits tumor cell growth. J. Exp. Med. 192: 1677-1683.
    OpenUrlAbstract/FREE Full Text
  65. ↵
    O’Connor, B. P., V. S. Raman, L. D. Erickson, W. J. Cook, L. K. Weaver, C. Ahonen, L.-L. Lin, G. T. Mantchev, R. J. Bram, R. J. Noelle. 2004. BCMA is essential for the survival of long-lived bone marrow plasma cells. J. Exp. Med. 199: 91-97.
    OpenUrlAbstract/FREE Full Text
  66. ↵
    Yang, M., H. Hase, D. Legarda-Addison, L. Varughese, B. Seed, A. T. Ting. 2005. BCMA, the receptor for APRIL and BAFF, induces antigen presentation in B cells. J. Immunol. 175: 2814-2824.
    OpenUrlAbstract/FREE Full Text
  67. ↵
    von Bülow, G.-U., J. M. van Deursen, R. J. Bram. 2001. Regulation of the T-independent humoral response by TACI. Immunity 14: 573-574.
    OpenUrlCrossRefPubMed
  68. ↵
    Yan, M., H. Wang, B. Chan, M. Roose-Girma, S. Erickson, T. Baker, D. Tumas, I. S. Grewal, V. M. Dixit. 2001. Activation and accumulation of B cells in TACI-deficient mice. Nat. Immunol. 2: 638-643.
    OpenUrlCrossRefPubMed
  69. ↵
    Castigli, E., S. A. Wilson, S. Scott, F. Dedeoglu, S. Xu, K.-P. Lam, R. J. Bram, H. Jabara, R. S. Geha. 2005. TACI and BAFF-R mediate isotype switching in B cells. J. Exp. Med. 201: 35-34.
    OpenUrlAbstract/FREE Full Text
  70. ↵
    Litinskiy, M. B., B. Nardelli, D. M. Hilbert, B. He, A. Schaffer, P. Casali, A. Cerutti. 2002. DCs induce CD40-independent immunoglobulin class switching through BLyS and APRIL. Nat. Immunol. 3: 822-829.
    OpenUrlCrossRefPubMed
  71. ↵
    Castigli, E., S. Scott, F. Dedeoglu, P. Bryce, H. Jabara, A. K. Bhan, E. Migozuchi, R. S. Geha. 2004. Impaired IgA class switching in APRIL-deficient mice. Proc. Natl. Acad. Sci. USA 101: 3903-3908.
    OpenUrlAbstract/FREE Full Text
  72. ↵
    Stein, J. V., M. López-Fraga, F. A. Elustondo, C. E. Carvalho-Pinto, D. Rodríguez, R. Gómez-Caro, J. de Jong, C. Martínez-A, J. P. Medema, M. Hahne. 2002. APRIL modulates B and T cell immunity. J. Clin. Invest. 109: 1587-1598.
    OpenUrlCrossRefPubMed
  73. ↵
    He, B., N. Raab-Traub, P. Casali, A. Cerutti. 2003. EBV-encoded latent membrane protein 1 cooperates with BAFF/BLyS and APRIL to induce T cell-independent Ig heavy chain class switching. J. Immunol. 171: 5215-5224.
    OpenUrlAbstract/FREE Full Text
  74. ↵
    Yamada, T., K. Zhang, A. Yamada, D. Zhu, A. Saxon. 2005. B lymphocyte stimulator activates p38 mitogen-activated protein kinase in human Ig class switch recombination. Am. J. Respir. Cell Mol. Biol. 32: 388-394.
    OpenUrlCrossRefPubMed
  75. ↵
    Sutherland, A. P. R., L. G. Ng, C. A. Fletcher, B. Shum, R. A. Newton, S. T. Grey, M. S. Rolph, F. Mackay, C. R. Mackay. 2005. BAFF augments certain Th1-associated inflammatory responses. J. Immunol. 174: 5537-5544.
    OpenUrlAbstract/FREE Full Text
  76. ↵
    Chan, O., M. J. Shlomchik. 1998. A new role for B cells in systemic autoimmunity: B cells promote spontaneous T cell activation in MRL-lpr/lpr mice. J. Immunol. 160: 51-59.
    OpenUrlAbstract/FREE Full Text
  77. ↵
    Shlomchik, M. J., M. P. Madaio, D. Ni, M. Trounstein, D. Huszar. 1994. The role of B cells in lpr/lpr-induced autoimmunity. J. Exp. Med. 180: 1295-1306.
    OpenUrlAbstract/FREE Full Text
  78. ↵
    Chan, O. T. M., L. G. Hannum, A. M. Haberman, M. P. Madaio, M. J. Shlomchik. 1999. A novel mouse with B cells but lacking serum antibody reveals an antibody-independent role for B cells in murine lupus. J. Exp. Med. 189: 1639-1647.
    OpenUrlAbstract/FREE Full Text
  79. ↵
    Baker, K. P., B. M. Edwards, S. H. Main, G. H. Choi, R. E. Wager, W. G. Halpern, P. B. Lappin, T. Riccobene, D. Abramian, L. Sekut, et al 2003. Generation and characterization of LymphoStat-B, a human monoclonal antibody that antagonizes the bioactivities of B lymphocyte stimulator. Arthritis Rheum. 48: 3253-3265.
    OpenUrlCrossRefPubMed
  80. ↵
    Furie, R., W. Stohl, E. Ginzler, M. Becker, N. Mishra, W. Chatham, J. T. Merrill, A. Weinstein, W. J. McCune, J. Zhong, et al 2003. Safety, pharmacokinetic and pharmacodynamic results of a phase 1 single and double dose-escalation study of Lymphostat-B (human monoclonal antibody to BLyS) in SLE patients. Arthritis Rheum. 48: S377
    OpenUrlCrossRef
PreviousNext
Back to top

In this issue

The Journal of Immunology: 177 (4)
The Journal of Immunology
Vol. 177, Issue 4
15 Aug 2006
  • Table of Contents
  • Table of Contents (PDF)
  • About the Cover
  • Advertising (PDF)
  • Back Matter (PDF)
  • Editorial Board (PDF)
  • Front Matter (PDF)
Print
Download PDF
Article Alerts
Sign In to Email Alerts with your Email Address
Email Article

Thank you for your interest in spreading the word about The Journal of Immunology.

NOTE: We only request your email address so that the person you are recommending the page to knows that you wanted them to see it, and that it is not junk mail. We do not capture any email address.

Enter multiple addresses on separate lines or separate them with commas.
Paucity of Clinical Disease despite Serological Autoimmunity and Kidney Pathology in Lupus-Prone New Zealand Mixed 2328 Mice Deficient in BAFF
(Your Name) has forwarded a page to you from The Journal of Immunology
(Your Name) thought you would like to see this page from the The Journal of Immunology web site.
CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.
Citation Tools
Paucity of Clinical Disease despite Serological Autoimmunity and Kidney Pathology in Lupus-Prone New Zealand Mixed 2328 Mice Deficient in BAFF
Chaim O. Jacob, Luminita Pricop, Chaim Putterman, Michael N. Koss, Yi Liu, Maria Kollaros, Sarah A. Bixler, Christine M. Ambrose, Martin L. Scott, William Stohl
The Journal of Immunology August 15, 2006, 177 (4) 2671-2680; DOI: 10.4049/jimmunol.177.4.2671

Citation Manager Formats

  • BibTeX
  • Bookends
  • EasyBib
  • EndNote (tagged)
  • EndNote 8 (xml)
  • Medlars
  • Mendeley
  • Papers
  • RefWorks Tagged
  • Ref Manager
  • RIS
  • Zotero
Share
Paucity of Clinical Disease despite Serological Autoimmunity and Kidney Pathology in Lupus-Prone New Zealand Mixed 2328 Mice Deficient in BAFF
Chaim O. Jacob, Luminita Pricop, Chaim Putterman, Michael N. Koss, Yi Liu, Maria Kollaros, Sarah A. Bixler, Christine M. Ambrose, Martin L. Scott, William Stohl
The Journal of Immunology August 15, 2006, 177 (4) 2671-2680; DOI: 10.4049/jimmunol.177.4.2671
del.icio.us logo Digg logo Reddit logo Twitter logo Facebook logo Google logo Mendeley logo
  • Tweet Widget
  • Facebook Like

Jump to section

  • Article
    • Abstract
    • Materials and Methods
    • Results
    • Discussion
    • Acknowledgments
    • Disclosures
    • Footnotes
    • References
  • Figures & Data
  • Info & Metrics
  • PDF

Related Articles

Cited By...

More in this TOC Section

  • Differential Susceptibility to Staphylococcal Superantigen (SsAg)-Induced Apoptosis of CD4+ T Cells from Atopic Dermatitis Patients and Healthy Subjects: The Inhibitory Effect of IL-4 on SsAg-Induced Apoptosis
  • HIV-1 Vaccination Administered Intramuscularly Can Induce Both Systemic and Mucosal T Cell Immunity in HIV-1-Uninfected Individuals
  • Osteopontin (Eta-1) and Fibroblast Growth Factor-2 Cross-Talk in Angiogenesis
Show more CLINICAL IMMUNOLOGY

Similar Articles

Navigate

  • Home
  • Current Issue
  • Next in The JI
  • Archive
  • Brief Reviews
  • Pillars of Immunology
  • Translating Immunology

For Authors

  • Submit a Manuscript
  • Instructions for Authors
  • About the Journal
  • Journal Policies
  • Editors

General Information

  • Advertisers
  • Subscribers
  • Rights and Permissions
  • Accessibility Statement
  • FAR 889
  • Privacy Policy
  • Disclaimer

Journal Services

  • Email Alerts
  • RSS Feeds
  • ImmunoCasts
  • Twitter

Copyright © 2022 by The American Association of Immunologists, Inc.

Print ISSN 0022-1767        Online ISSN 1550-6606