We have previously reported that heat-shock protein (hsp) 60-reactive T-cell receptor (TCR)γδ+ T cells appear in the peritoneal cavity during the early stage of infection with Listeria monocytogenes in mice. In this study, we examined the kinetics of TCRγδ+ T cells during listeriosis in F344 rats by flow cytometry using a V65 monoclonal antibody (mAb) directed to a constant determinant of rat TCRγδ chains. TCRγδ+ T cells significantly increased in the peritoneal cavity on day 6 and then decreased by day 10 after infection, in parallel with the kinetics of hsp60 expression in the peritoneal macrophages during listeriosis in F344 rats. Most of the early appearing TCRγδ+ T cells were of the CD4-CD8αβ+ CD5+ lymphocyte function-associated antigen (LFA)-1α(high) CD45RC- interleukin-2 receptor (IL-2R) α- phenotype, although a significant fraction of the TCRγδ+ T cells expressed CD8α only. The increase in TCRγδ+ T cells during listeriosis was prominent in F1 (F344 x Lewis) rats but only marginal in Lewis rats, which was correlated with the expression level of hsp 60 in the peritoneal macrophages. The peritoneal TCRγδ+ T cells in naive F344 rats appeared to proliferate significantly in response to recombinant hsp 60 (rhsp 60) derived from Mycobacterium bovis bacillus Calmette-Guerin (BCG). These results imply that the early appearance of hsp 60-reactive TCRγδ+ T cells during listerial infection can be generalized across species.
|Number of pages
|Published - 1996
All Science Journal Classification (ASJC) codes
- Immunology and Allergy