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ANGPTL8 (Betatrophin) is Expressed in Visceral Adipose Tissue and Relates to Human Hepatic Steatosis in Two Independent Clinical Collectives
Update time:2017-06-07 19:23:00   【 Font: Large  Medium Small

Angiopoietin-like protein 8 (ANGPTL8)/betatrophin expression in visceral adipose tissue and associations with circulating fatty acid profile have not yet been investigated. Forty subjects were included in a cross-sectional study, 57 in a dietary weight reduction intervention. Circulating Angiopoietin-like protein 8/betatrophin was measured in all subjects. Liver and adipose tissue were sampled and plasma fatty acids and tissue Angiopoietin-like protein 8/betatrophin expression were evaluated in the cross-sectional study. In the intervention study oral glucose testing and liver magnetic resonance scanning at baseline and after 6 months were performed. Angiopoietin-like protein 8/betatrophin mRNA was increased in visceral compared to subcutaneous adipose tissue (p < 0.001). Circulating ANGPTL8/betatrophin correlated with liver steatosis (r = 0.42, p = 0.047), triacylglycerols (r = 0.34, p = 0.046), saturated (r = 0.43, p = 0.022), monounsaturated (r = 0.51, p = 0.007), and polyunsaturated fatty acids (r = − 0.53, p = 0.004).In the intervention study, baseline Angiopoietin-like protein 8/betatrophin correlated with age (r = 0.32, p = 0.010) and triacylglycerols (r = 0.30, p = 0.02) and was increased with hepatic steatosis (p = 0.033). Weight loss reduced liver fat by 45 % and circulating Angiopoietin-like protein 8/betatrophin by 11 % (288 ± 17 vs. 258 ± 17 pg/ml; p = 0.015). Angiopoietin-like protein 8/betatrophin is related to liver steatosis, while visceral adipose tissue represents an additional site of expression in humans.

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Source:Hormone and Metabolic Research      by Christian von L, Andreas F. H. Pfeiffer, Johan F. L, et al.
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