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Repopulation with IgA-Containing Cells of Bronchial and Intestinal Lamina Propria after Transfer of Homologous Peyer's Patch and Bronchial Lymphocytes^1,2,

From the Departments of Medicine and Pathology, Host Resistance Programme, McMaster University, Hamilton, Ontario, Canada

Abstract

Transfer of 50 million rabbit allogeneic lymphocytes from either bronchus-associated lymphoid tissue (BALT) or Peyer's patches into 1000 R x-irradiated recipients results, 6 days later, in predominant repopulation of gut and bronchial lamina propria, as well as spleen, with IgA-containing cells.

After repopulation with BALT or Peyer's patch cells, lymphoid follicles in both gut and lung showed peripheral cellular membrane type of fluorescence with fluorescein-conjugated anti-IgA antisera only.

Six days after x-irradiation alone, little evidence of repopulation was seen and immunofluorescent qualitative observations of gut and lung, and quantitative data in the spleen, confirmed these findings. After transfer of 50 million lymph node cells, very few immunoglobulin-containing cells were seen in the gut or bronchial lamina propria.

These results suggest that there may be a common mucosal immunologic system, and that repopulation of gut and lung lamina propria may be through the organized lymphoid tissue therein.

Footnotes

¹ This work was supported by the Medical Research Council of Canada and the Ontario Department of Health, Ontario, Canada.

² Presented in part at the American Federation of Biological Societies' 58th Annual Meeting, Atlantic City, 1974.

³ To whom requests for reprints should be addressed.

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