Trigonelline prevents high cholesterol and high fat diet induced hepatic lipid accumulation and lipo-toxicity in C57BL/6J mice, via restoration of hepatic autophagy.

Sharma, Love; Lone, Nazir A.; Knott, Rachel M.; Hassan, Adil; Abdullah, Tasduq

Abstract

Non-alcoholic fatty liver disease (NAFLD) is often linked with impaired hepatic autophagy. Here, we studied the alterations in hepatocellular autophagy by high cholesterol and high-fat diet (HC-HF) diet in C57BL/6J mice, and by palmitic acid (PA), in AML-12 and HepG2 cells. Further, we analysed role of Trigonelline (TG), a plant alkaloid, in preventing NAFLD, by modulating autophagy. For this, C57BL/6J mice were fed with Standard Chow (SC) or HC-HF diet, with and without TG for 16 weeks. In-vitro; AML-12 cells and HepG2 cells, were exposed to PA with and without TG, for 24?h. Cellular events related to autophagy, lipogenesis, and lipo-toxicity were studied. The HC-HF diet fed mice showed hepatic autophagy blockade, increased triglycerides and steatosis. PA exposure to AML-12 cells and HepG2 cells induced impaired autophagy, ER stress, resulting in lipotoxicity. TG treatment in HC-HF fed mice, restored hepatic autophagy, and prevented steatosis. TG treated AML-12, and HepG2 cells exposed to PA showed autophagy restoration, and reduced lipotoxicity, however, these effects were diminished in Atg7-/- HepG2 cells, and in the presence of chloroquine. This study shows that HC-HF diet-induced impaired autophagy, and steatosis is prevented by TG, which attributes to its novel mechanism in treating NAFLD.

Citation

SHARMA, L., LONE, N.A., KNOTT, R.M., HASSAN, A., ABDULLAH, T. 2018. Trigonelline prevents high cholesterol and high fat diet induced hepatic lipid accumulation and lipo-toxicity in C57BL/6J mice, via restoration of hepatic autophagy. Food and chemical toxicology [online], 121, pages 283-296. Available from: https://doi.org/10.1016/j.fct.2018.09.011

• Journal Article Type: Article
• Acceptance Date: Sep 7, 2018
• Online Publication Date: Sep 9, 2018
• Publication Date: Nov 30, 2018
• Deposit Date: Sep 14, 2018
• Publicly Available Date: Sep 10, 2019
• Journal: Food and chemical toxicology
• Print ISSN: 0278-6915
• Electronic ISSN: 1873-6351
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 121
• Pages: 283-296
• DOI: https://doi.org/10.1016/j.fct.2018.09.011
• Keywords: Trigonelline; Autophagy; NAFLD
• Public URL: http://hdl.handle.net/10059/3132