Role of ANGPTL8 in NAFLD Improvement after Bariatric Surgery in Experimental and Human Obesity.

Abstract

Angiopoietin-like protein 8 (ANGPTL8) is an hepatokine altered in several metabolic conditions, such as obesity, type 2 diabetes, dyslipidemia and nonalcoholic fatty liver disease (NAFLD). We sought to explore whether ANGPTL8 is involved in NAFLD amelioration after bariatric surgery in experimental models and patients with severe obesity. Plasma ANGPTL8 was measured in 170 individuals before and 6 months after bariatric surgery. Hepatic ANGPTL8 expression was evaluated in liver biopsies of patients with severe obesity undergoing bariatric surgery with available liver pathology analysis (n = 75), as well as in male Wistar rats with diet-induced obesity subjected to sham operation, sleeve gastrectomy or Roux-en-Y gastric bypass (RYGB) (n = 65). The effect of ANGPTL8 on lipogenesis was assessed in human HepG2 hepatocytes under palmitate-induced lipotoxic conditions. Plasma concentrations and hepatic expression of ANGPTL8 were increased in patients with obesity-associated NAFLD in relation to the degree of hepatic steatosis. Sleeve gastrectomy and RYGB improved hepatosteatosis and reduced the hepatic ANGPTL8 expression in the preclinical model of NAFLD. Interestingly, ANGPTL8 inhibited steatosis and expression of lipogenic factors (PPARG2, SREBF1, MOGAT2 and DGAT1) in palmitate-treated human hepatocytes. Together, ANGPTL8 is involved in the resolution of NAFLD after bariatric surgery partially by the inhibition of lipogenesis in steatotic hepatocytes.

• Authors: Carolina M Perdomo, Javier Gómez-Ambrosi, Sara Becerril, Víctor Valentí, Rafael Moncada, Eva M Fernández-Sáez, Leire Méndez-Giménez, Silvia Ezquerro, Victoria Catalán, Camilo Silva, Javier Escalada, Gema Frühbeck, Amaia Rodríguez
• Journal: International journal of molecular sciences (Int J Mol Sci) Vol. 22 Issue 23 (Nov 30 2021) ISSN: 1422-0067 [Electronic] Switzerland
• PMID: 34884755 (Publication Type: Journal Article)

Chemical References

• ANGPTL8 protein, human
• Angiopoietin-Like Protein 8
• Angptl8 protein, rat
• Peptide Hormones
• RNA, Messenger

Topics

• Adult
• Angiopoietin-Like Protein 8 (blood, genetics, metabolism)
• Animals
• Bariatric Surgery
• Disease Models, Animal
• Female
• Gastrectomy
• Gastric Bypass
• Hepatocytes (metabolism)
• Humans
• Lipogenesis
• Liver (metabolism, pathology)
• Male
• Middle Aged
• Non-alcoholic Fatty Liver Disease (etiology, metabolism, surgery)
• Obesity, Morbid (complications, metabolism, surgery)
• Peptide Hormones (blood, genetics, metabolism)
• RNA, Messenger (genetics, metabolism)
• Rats
• Rats, Wistar