Abstract:
:The survival of T lymphocytes requires sustained, Ca(2+) influx-dependent gene expression. The molecular mechanism that governs sustained Ca(2+) influx in naive T lymphocytes is unknown. Here we report an essential role for the beta3 regulatory subunit of voltage-gated calcium (Ca(v)) channels in the maintenance of naive CD8(+) T cells. Deficiency in beta3 resulted in a profound survival defect of CD8(+) T cells. This defect correlated with depletion of the pore-forming subunit Ca(v)1.4 and attenuation of T cell antigen receptor (TCR)-mediated global Ca(2+) entry in CD8(+) T cells. Ca(v)1.4 and beta3 associated with T cell signaling machinery and Ca(v)1.4 localized in lipid rafts. Our data demonstrate a mechanism by which Ca(2+) entry is controlled by a Ca(v)1.4-beta3 channel complex in T cells.
journal_name
Nat Immunoljournal_title
Nature immunologyauthors
Jha MK,Badou A,Meissner M,McRory JE,Freichel M,Flockerzi V,Flavell RAdoi
10.1038/ni.1793subject
Has Abstractpub_date
2009-12-01 00:00:00pages
1275-82issue
12eissn
1529-2908issn
1529-2916pii
ni.1793journal_volume
10pub_type
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