Transcriptomics

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Control of Autophagic Cell Death by Caspase-10 in Multiple Myeloma


ABSTRACT: We performed a loss-of-function, RNA interference screen to define new therapeutic targets in multiple myeloma, a genetically diverse plasma cell malignancy. Unexpectedly, we discovered that all myeloma lines require caspase-10 for survival, irrespective of their genetic abnormalities. The transcription factor IRF4 induces both caspase-10 and its associated protein cFLIPL in myeloma, generating a protease that does not induce apoptosis but rather blocks an autophagy-dependent cell death pathway. Caspase-10 inhibits autophagy by cleaving the BCL2-interacting protein BCLAF1, itself a strong inducer of autophagy that acts by displacing beclin-1 from BCL2. While myeloma cells require a basal level of autophagy for survival, caspase-10 tempers this response to avoid cell death. Drugs that disrupt this vital balance may have therapeutic potential in myeloma.

ORGANISM(S): Homo sapiens

PROVIDER: GSE43878 | GEO | 2013/03/13

SECONDARY ACCESSION(S): PRJNA188236

REPOSITORIES: GEO

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