Redundant and specialized roles for diacylglycerol kinases α and ζ in the control of T cell functions.

Abstract:

:The diacylglycerol kinases (DGKs) attenuate diacylglycerol (DAG)-mediated signals by catalyzing the conversion of DAG to phosphatidic acid. In T lymphocytes, the antigen-stimulated generation of DAG links signal strength to the intensity and duration of signaling by the Ras-extracellular signal-regulated kinase (ERK) and protein kinase C (PKC)-dependent pathways. The generation of DAG at the plasma membrane of T cells lies at the core of the mechanisms that delimit T cell functions. DGKα and DGKζ are the two main isoforms that are found in T cells, and several approaches define their precise contribution to T cell responses. Each of these isoforms has specialized and redundant functions that limit the intensity of DAG-regulated signals downstream of antigenic stimulation. This ability, which in normal T cells contributes to maintaining homeostasis and function, is exploited by tumors to evade immune surveillance. Modification of DGK activity offers new perspectives for the therapeutic manipulation of T cell functions for treatment of autoimmune pathologies, or for overcoming tumor-induced T cell tolerance. Precise knowledge of the mechanisms that sustain DGK isoform-specific regulation in T lymphocytes is indispensable for the development of new tools for pharmacological intervention.

journal_name

Sci Signal

journal_title

Science signaling

authors

Mérida I,Andrada E,Gharbi SI,Ávila-Flores A

doi

10.1126/scisignal.aaa0974

subject

Has Abstract

pub_date

2015-04-28 00:00:00

pages

re6

issue

374

eissn

1945-0877

issn

1937-9145

pii

8/374/re6

journal_volume

8

pub_type

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