Rastegar Hoseini1, Arsalan Damirchi1, Parvin Babaei2. 1. Department of Sports Physiology, Faculty of Physical Education and Sport Sciences, University of Guilan, Rasht, Iran. 2. Department of Physiology, Cellular and Molecular Research Center, Faculty of Medicine, Guilan University of Medical Sciences, Rasht, Iran. Electronic address: p_babaei@gums.ac.ir.
Abstract
OBJECTIVES: Peroxisome proliferator-activated receptor (PPAR) and vitamin D signaling pathways regulate a multitude of genes involved in different physiological functions. The aim of the present study was to examine the effects of vitamin D supplementation and aerobic training on metabolic syndrome and PPARγ expression. METHODS: Forty female ovariectomized rats were divided into five groups of aerobic training with high (OVX + Exe + HD), moderate (OVX + Exe + MD), and low dose of vitamin D (OVX + Exe + LD), aerobic training receving vehicle (sesame oil; OVX + Exe + oil), and sham-operated control (sham) groups. After 2 mo of treatment, serum insulin, vitamin D, glucose, lipid profile, visceral fat, and liver PPARγ gene expression were measured. RESULTS: The combination of exercise and high doses of vitamin D significantly reduced insulin (P = 0.039), blood glucose (P = 0.024), and homeostatic model assessment for insulin resistance (P = 0.011), and elevated PPARγ gene expression (P = 0.032). Also, treatment with aerobic training and either high or moderate vitamin D, ameliorated overall metabolic syndrome Z scores (P = 0.001). CONCLUSION: Findings from the present study suggested that a sedentary lifestyle and vitamin D deficiency accelerated the occurrence of metabolic syndrome probably by decreasing the expression of nuclear receptor PPARγ. Additionally, adequate levels of plasma vitamin D are necessary to achieve the beneficial metabolic effects of physical activity.
OBJECTIVES:Peroxisome proliferator-activated receptor (PPAR) and vitamin D signaling pathways regulate a multitude of genes involved in different physiological functions. The aim of the present study was to examine the effects of vitamin D supplementation and aerobic training on metabolic syndrome and PPARγ expression. METHODS: Forty female ovariectomized rats were divided into five groups of aerobic training with high (OVX + Exe + HD), moderate (OVX + Exe + MD), and low dose of vitamin D (OVX + Exe + LD), aerobic training receving vehicle (sesame oil; OVX + Exe + oil), and sham-operated control (sham) groups. After 2 mo of treatment, serum insulin, vitamin D, glucose, lipid profile, visceral fat, and liver PPARγ gene expression were measured. RESULTS: The combination of exercise and high doses of vitamin D significantly reduced insulin (P = 0.039), blood glucose (P = 0.024), and homeostatic model assessment for insulin resistance (P = 0.011), and elevated PPARγ gene expression (P = 0.032). Also, treatment with aerobic training and either high or moderate vitamin D, ameliorated overall metabolic syndrome Z scores (P = 0.001). CONCLUSION: Findings from the present study suggested that a sedentary lifestyle and vitamin D deficiency accelerated the occurrence of metabolic syndrome probably by decreasing the expression of nuclear receptor PPARγ. Additionally, adequate levels of plasma vitamin D are necessary to achieve the beneficial metabolic effects of physical activity.
Authors: D Serrano; J A Crookshank; B S Morgan; R W Mueller; M-F Paré; L Marandi; P Poussier; F W Scott Journal: Sci Rep Date: 2019-10-10 Impact factor: 4.379