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Cutting Edge: Unique T Cells That Recognize Citrullinated Peptides Are a Feature of Protein Immunization¹

Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110

Abs against citrullinated proteins are present in patients with rheumatoid arthritis. In this study, we describe a unique cohort of T cells that selectively responded to citrullinated variants of two epitopes of hen egg-white lysozyme, a major and a minor one, bound to the MHC molecule, I-A^k. In addition, we show that when given an intact, unmodified lysozyme protein, dendritic cells and peritoneal macrophages presented citrullinated peptides and stimulated modification-specific T cells. Thus, presentation of citrullinated-peptide-MHC complex is a feature of immune responses to protein Ags.

This article has been cited by other articles:

				A. Beltrami, M. Rossmann, M. T. Fiorillo, F. Paladini, R. Sorrentino, W. Saenger, P. Kumar, A. Ziegler, and B. Uchanska-Ziegler Citrullination-dependent Differential Presentation of a Self-peptide by HLA-B27 Subtypes J. Biol. Chem., October 3, 2008; 283(40): 27189 - 27199. [Abstract] [Full Text] [PDF]