Protection from bacterial-toxin-induced apoptosis in macrophages requires the lipogenic transcription factor sterol regulatory element binding protein 1a.

ABSTRACT: Sterol regulatory element binding protein (SREBP) transcription factors activate genes of lipid metabolism, but recent studies indicate they also activate genes involved in other physiologic processes, suggesting that SREPBs have evolved to connect lipid metabolism with diverse physiologic responses. There are three major mammalian SREBPs, and the 1a isoform is specifically expressed at very high levels in macrophages, where a recent study showed that it couples lipid synthesis to the proinflammatory phase of the innate immune response. In the present study, we show that loss of SREBP-1a also results in an increase in apoptosis after exposure to bacterial pore-forming toxins and we show this is a result of a selective reduction in the expression of the gene coding for the antiapoptotic fac

SUBMITTER: Im SS 

PROVIDER: S-EPMC3372266 | biostudies-literature | 2012 Jun

REPOSITORIES: biostudies-literature