期刊
CELL HOST & MICROBE
卷 25, 期 4, 页码 588-+出版社
CELL PRESS
DOI: 10.1016/j.chom.2019.02.015
关键词
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资金
- Japan Agency for Medical Research and Development [JP18fk0210046, JP18fk0210012, JP18fk0210020, JP17fk0210201, JP18fk0210005, JP18fk0310110, 17H06393]
- Grants-in-Aid for Scientific Research [17H06393] Funding Source: KAKEN
Patients infected with hepatitis C virus (HCV) have an increased risk of developing type 2 diabetes. HCV infection is linked to various liver abnormalities, potentially contributing to this association. We show that HCV infection increases the levels of hepatic selenoprotein P (SeP) mRNA (SEPP1 mRNA) and serum SeP, a hepatokine linked to insulin resistance. SEPP1 mRNA inhibits type I interferon responses by limiting the function of retinoic-acid-inducible gene I (RIG-I), a sensor of viral RNA. SEPP1 mRNA binds directly to RIG-I and inhibits its activity. SEPP1 mRNA knockdown in hepatocytes causes a robust induction of interferon-stimulated genes and decreases HCV replication. Clinically, high SeP serum levels are significantly associated with treatment failure of direct-acting antivirals in HCV-infected patients. Thus, SeP regulates insulin resistance and innate immunity, possibly inducing immune tolerance in the liver, and its upregulation may explain the increased risk of type 2 diabetes in HCV-infected patients.
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