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Δευτέρα 12 Μαρτίου 2018

RIPK1 binds MCU to mediate induction of mitochondrial Ca2+ uptake and promote colorectal oncogenesis

The receptor-interacting protein kinase 1 (RIPK1) is an essential signaling molecule in pathways for cell survival, apoptosis, and necroptosis. We report here that RIPK1 is upregulated in human colorectal cancer (CRC) and promotes cell proliferation when overexpressed in a colon cancer cell line. RIPK1 interacts with mitochondrial Ca2+ uniporter (MCU) to promote proliferation by increasing mitochondrial Ca2+ uptake and energy metabolism. The ubiquitination site of RIPK1 (RIPK1-K377) was critical for this interaction with MCU and function in promoting cell proliferation. These findings identify the RIPK1-MCU pathway as a promising target to treat CRC.

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