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Role of the transcriptional regulator SP140 in resistance to bacterial infection via repression of type I interferons

ABSTRACT: Type I interferons (IFNs) are essential for anti-viral immunity, but often impair protective immune responses during bacterial infections. An important question is how type I IFNs are strongly induced during viral infections, and yet are appropriately restrained during bacterial infections. The Super susceptibility to tuberculosis 1 (Sst1) locus in mice confers resistance to diverse bacterial infections. Here we provide evidence that Sp140 is a gene encoded within the Sst1 locus that represses type I IFN transcription during bacterial infections. We generated Sp140–/– mice and find they are susceptible to infection by Legionella pneumophila and Mycobacterium tuberculosis. Susceptibility of Sp140–/– mice to bacterial infection was rescued by crosses to mice lacking the type I IFN receptor (Ifnar–/–). Our results implicate Sp140 as an important repressor of type I IFNs that is essential for resistance to bacterial infections.

ORGANISM(S): Mus musculus

PROVIDER: GSE166114 | GEO | 2021/02/04

REPOSITORIES: GEO

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