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CD4+ CCR5+ and CD4+ CCR3+ lymphocyte subset and monocyte apoptosis in patients with acute visceral leishmaniasis.

Authors: Potestio, M  D'Agostino, P  Romano, GC  Milano, S  Ferlazzo, V  Aquino, A  Di Bella, G  Caruso, R  Gambino, G  Vitale, G  Mansueto, S  Cillari, E 
Citation: Potestio M, etal., Immunology. 2004 Oct;113(2):260-8.
Pubmed: (View Article at PubMed) PMID:15379987
DOI: Full-text: DOI:10.1111/j.1365-2567.2004.01948.x

The potential involvement of apoptosis in the pathogenesis of visceral leishmaniasis (VL) was examined by studying spontaneous and Leishmania antigen (LAg)-induced apoptosis using cryopreserved peripheral blood mononuclear cells (PBMC) of Sicilian patients with VL. Results indicate that monocytes and T lymphocytes from acute VL patients show a significantly higher level of apoptosis compared with that observed in healed subjects. The percentage of apoptotic cells was higher in monocytes than in T lymphocytes. T cells involved in programmed cell death (PCD) were mainly of the CD4(+) phenotype. In particular, the T helper 1-type (Th1) subset, as evaluated by chemokine receptor-5 (CCR5) expression, is involved in this process. Cell death in Th1-type uses a CD95-mediated mechanism. Furthermore, Th1-type CCR5(+) cells are prone to cell suicide in an autocrine or paracrine way, as attested by enhanced expression of CD95L in acute VL patients. The reduction in Th1-type cells by apoptosis was confirmed by the decrease in interferon-gamma secretion. In conclusion, apoptosis of monocytes, CD4(+) and CD4(+) CCR5(+) T cells could be involved in the failure of cell mediated immunity that is responsible for severe immune-depression in VL.

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CRRD Object Information
CRRD ID: 6893393
Created: 2012-08-24
Species: All species
Last Modified: 2012-08-24
Status: ACTIVE



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