Back to Search
Start Over
Programmed death ligand-1 expression and memory T-cell generation in Coxiella burnetii infection.
- Source :
-
Microbial Pathogenesis . Mar2015, Vol. 80, p1-6. 6p. - Publication Year :
- 2015
-
Abstract
- Programmed death ligand-1 (PD-L1) is a co-signaling molecule that regulates T-cell responses in vivo . Its role in bacterial infections, including Q fever, a zoonosis due to Coxiella burnetii infection, is not well understood. We showed by flow cytometry that PD-L1 membrane expression was specifically increased in T-cells from patients with acute Q fever, not from patients with Q fever endocarditis, suggesting that PD-L1 plays a role in the early phases of C. burnetii infection. To assess this hypothesis, we studied the role of PD-L1 in C. burnetii -infected mice. C. burnetii infection resulted in PD-L1 up-regulation in splenocytes. Anti-PD-L1 antibodies injected into the mice did not affect the total number of splenic T-cells but increased the relative number of CD4 + T-cells compared with CD8 + T-cells. Additionally, anti-PD-L1 antibodies significantly increased the number of splenic CD4 + and CD8 + T cells that expressed low membrane CD62L levels. Our results indicate that the increased expression of PD-L1 by T-cells is associated with a decreased number of memory T-cells during C. burnetii infection, opening new perspectives in the understanding of Q fever pathophysiology. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 08824010
- Volume :
- 80
- Database :
- Academic Search Index
- Journal :
- Microbial Pathogenesis
- Publication Type :
- Academic Journal
- Accession number :
- 101935125
- Full Text :
- https://doi.org/10.1016/j.micpath.2015.02.002