title: Ameliorative effects of α-lipoic acid on high-fat diet-induced oxidative stress and glucose uptake impairment of T cells.
abstract: The incidence of obesity and metabolic disease continues to rise, mainly associated with consumption of a high-fat diet (HFD). Previous studies have indicated that HFD could disturb the immune system, leading to immunodeficiency and inflammation. Several mechanisms have been postulated to account for immunodeficiency associated with HFD, one being oxidative stress. To further investigate the effects of HFD on glucose metabolism and proliferative capability of T cells and the protective effects of α-lipoic acid (LA), male C57BL/6J mice were fed a normal chow (10% fat), an HFD (60% fat), an LA supplement (HFD +0.1%LA), and a N-acetyl-L-cysteine supplement (HFD +0.1% NAC) for 10 weeks. Results showed that 10-week HFD increased intracellular reactive oxygen species (ROS) production, induced oxidative stress state formation, inhibited glucose uptake, decreased ATP concentration, reduced proliferative rate, and dampened IL-2 production of T cells of mice. Administration of LA significantly alleviated these changes induced by HFD. These findings reveal that oxidative stress of T cells caused by HFD may be a key factor leading to glucose metabolism reduction and proliferative capability and function impairment of T cells. LA, as a potent agonist, could promote Nrf2 nuclear translocation and up-regulate expression of Nrf2 target genes (Ho-1 and Prdx1), which can eliminate excess ROS and restore redox balance of cells.
authors.affiliation: a College of Food Engineering , Xuzhou Institute of Technology , Xuzhou , China.|b Jiangsu Key Laboratory of Food Resource Development and Quality Safe , Xuzhou Institute of Technology , Xuzhou , China.
authors.forename: Jue
authors.initials: J
authors.lastname: Cui
authors.affiliation: c Food Science and Technology Programme, Department of Chemistry , National University of Singapore , Singapore.
authors.forename: Dejian
authors.initials: D
authors.lastname: Huang
authors.affiliation: a College of Food Engineering , Xuzhou Institute of Technology , Xuzhou , China.|b Jiangsu Key Laboratory of Food Resource Development and Quality Safe , Xuzhou Institute of Technology , Xuzhou , China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Zheng
mesh_terms: D000818:Animals; D059305:Diet, High-Fat; D005947:Glucose / Q000494:pharmacology*; D006801:Humans; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D009765:Obesity / Q000150:complications*; D018384:Oxidative Stress; D017382:Reactive Oxygen Species; D013601:T-Lymphocytes / Q000378:metabolism*; D008063:Thioctic Acid / Q000378:metabolism*; D015854:Up-Regulation
chemical_list: D017382:Reactive Oxygen Species; D008063:Thioctic Acid; D005947:Glucose
keywords: High-fat diet; T cells; glucose mechanism; oxidative stress; α-lipoic acid