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Elevated circulating lipasin/betatrophin in human type 2 diabetes and obesity.

Fu Z., Berhane F., Fite A., Seyoum B., Abou-Samra A.B., Zhang R.

Lipasin (also known as C19ORF80, RIFL, ANGPTL8 and betatrophin) is a newly discovered circulating factor that regulates lipid metabolism and promotes pancreatic β-cell proliferation. Whether circulating levels of lipasin in humans are altered in a) type 2 diabetes; b) obesity and c) the postprandial state, however, is unknown. The current study aimed to compare serum lipasin levels in those who were a) non-diabetic (N=15) or diabetic (BMI- and age-matched; N=14); b) lean or obese (N=53 totally) and c) fasting and 2 hours following a defined meal (N=12). Serum lipasin levels were determined by the enzyme-linked immunosorbent assay. Lipasin levels [mean±SEM] were increased by more than two fold (P<0.001) in the diabetic patients (5.56±0.73 ng/mL) as compared to the control subjects (2.19±0.24 ng/mL). Serum lipasin levels were positively correlated with BMI (rho=0.49, P<0.001), and showed a 35% increase 2 hours following a defined meal (P=0.009). Therefore, lipasin/betatrophin is nutritionally-regulated hepatokine that is increased in human type 2 diabetes and obesity.

Sci. Rep. 4:5013-5013(2014) [PubMed] [Europe PMC]

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