Adhesion molecules and kinases involved in gammadelta T cells migratory pathways: implications for viral and autoimmune diseases.

Abstract:

:gammadelta T lymphocytes are involved in the defence from viral and mycobacterial infections; however they are also responsible for autoimmune reactions. Herein, we discuss the characteristics of these cells, focusing on the mechanism(s) underlying extravasation and tissue localization. We show that Vdelta1 and Vdelta2 gammadeltaT cells display differential expression of adhesion molecules and chemokine receptors, the former being preferentially PECAM-1(+)CXCR4(+), the latter expressing NKRP1A and CXCR3. The two cell populations transmigrate across endothelial cells by activation of distinct kinase pathways and in response to interferon-gamma-inducing protein-10 (IP-10/CXCL10) or stromal-derived factor-1 (SDF-1/CXCL12) according to the expression of the specific receptors CXCR3 and CXCR4. IP-10/CXCL10 and SDF-1/CXCL12-induced transmigration are phosphoinositide-3 kinase (PI-3K) and Akt/PKB-dependent. In addition, occupancy of CXCR3, but not of CXCR4, leads to CAMKII activation; blocking of CAMKII decreases IP-10/CXCL10 and 6Ckine/SLC/CCL21-driven transmigration. We report that HIV-1-infected patients have an increased number of circulating Vdelta1 T cells possibly due to the interference of Tat protein on the function of chemokine receptors. In turn, patients with relapsing-remitting multiple sclerosis (MS), display an increase in peripheral Vdelta2 gammadelta T cells and this is related to interleukin-12-mediated upregulation of NKRP1A. Finally, the possible role of gammadelta T lymphocytes in post-transplantation immune reconstitution is discussed.

journal_name

Curr Med Chem

authors

Poggi A,Catellani S,Fenoglio D,Borsellino G,Battistini L,Zocchi MR

doi

10.2174/092986707782793835

subject

Has Abstract

pub_date

2007-01-01 00:00:00

pages

3166-70

issue

30

eissn

0929-8673

issn

1875-533X

journal_volume

14

pub_type

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