In vivo antagonism of a T cell response by an endogenously expressed ligand. Proc Natl Acad Sci U S A 1998 Nov 24;95(24):14332-6
Date
11/25/1998Pubmed ID
9826700Pubmed Central ID
PMC24373DOI
10.1073/pnas.95.24.14332Scopus ID
2-s2.0-0032564340 35 CitationsAbstract
3.L2 T cell receptor transgenic T cells are activated by the 64-76 peptide of the mouse hemoglobin d beta chain [Hb(64-76)], and their response is antagonized by the position 72 alanine substitution of this peptide (A72). To test the effect of this altered peptide ligand (APL) on 3.L2 T cell function in vivo, a transgene expressing A72 in major histocompatibility complex II positive cells (A72tg) has been introduced into mice. We demonstrate that 3.L2 T cells, when transferred to A72tg+ mice show a dramatically reduced proliferative response to Hb(64-76). Identical decreased responses were observed using T cells that developed in either A72tg+ or A72tg- hosts. This affect was not attributable to diminished precursor frequency, anergy, or competition for binding to I-Ek molecules. These results unequivocally demonstrate in vivo antagonism by an endogenous APL and characterize a class of self-peptides that, although inefficient in causing deletion in the thymus, effectively modulate T cell responses in the periphery.
Author List
Basu D, Williams CB, Allen PMAuthor
Calvin B. Williams MD, PhD Chief, Professor in the Pediatrics department at Medical College of WisconsinMESH terms used to index this publication - Major topics in bold
AllelesAmino Acid Sequence
Animals
Cells, Cultured
Crosses, Genetic
Flow Cytometry
Hemoglobins, Abnormal
Histocompatibility Antigens Class II
Lymphocyte Activation
Mice
Mice, Transgenic
Peptide Fragments
Receptors, Antigen, T-Cell
T-Lymphocytes
