Hepatokine ERAP1 Disturbs Skeletal Muscle Insulin Sensitivity Via Inhibiting USP33-Mediated ADRB2 Deubiquitination
Diabetes, ISSN: 1939-327X, Vol: 71, Issue: 5, Page: 921-933
2022
- 11Citations
- 10Captures
- 1Mentions
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- Citations11
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- 11
- Captures10
- Readers10
- 10
- Mentions1
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Most Recent News
Researchers from Fudan University Provide Details of New Studies and Findings in the Area of Insulin Resistance (Hepatokine Erap1 Disturbs Skeletal Muscle Insulin Sensitivity Via Inhibiting Usp33-mediated Adrb2 Deubiquitination)
2023 FEB 06 (NewsRx) -- By a News Reporter-Staff News Editor at Genomics & Genetics Daily -- Fresh data on Endocrine System Diseases and Conditions
Article Description
Chronic inflammation in liver induces insulin resistance systemically and in other tissues, including the skeletal muscle (SM); however, the underlying mechanisms remain largely unknown. RNA sequencing of primary hepatocytes from wild-type mice fed long-term high-fat diet (HFD), which have severe chronic inflammation and insulin resistance revealed that the expression of hepatokine endoplas-mic reticulum aminopeptidase 1 (ERAP1) was upregulated by a HFD. Increased ERAP1 levels were also observed in interferon-g–treated primary hepatocytes. Furthermore, hepatic ERAP1 overexpression attenuated systemic and SM insulin sensitivity, whereas hepatic ERAP1 knockdown had the opposite effects, with corresponding changes in serum ERAP1 levels. Mechanistically, ERAP1 functions as an antagonist-like factor, which interacts with b2 adre-nergic receptor (ADRB2) and reduces its expression by decreasing ubiquitin-specific peptidase 33–mediated deubiquitination and thereby interrupts ADRB2-stimu-lated insulin signaling in the SM. The findings of this study indicate ERAP1 is an inflammation-induced hep-atokine that impairs SM insulin sensitivity. Its inhibition may provide a therapeutic strategy for insulin resistan-ce–related diseases, such as type 2 diabetes.
Bibliographic Details
American Diabetes Association
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