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Vitamin D and Swimming Exercise Prevent Obesity in Rats under a High-Fat Diet via Targeting FATP4 and TLR4 in the Liver and Adipose Tissue

Author

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  • Eman Kolieb

    (Medical Physiology Department, Faculty of Medicine, Suez Canal University, Ismailia 41522, Egypt)

  • Shymaa Ahmed Maher

    (Medical Biochemistry and Molecular Biology Department, Faculty of Medicine, Suez Canal University, Ismailia 41522, Egypt
    Center of Excellence in Molecular and Cellular Medicine (CEMCM), Faculty of Medicine, Suez Canal University, Ismailia 41522, Egypt)

  • Mohammed Nader Shalaby

    (Biological Sciences and Sports Health Department, Faculty of Physical Education, Suez Canal University, Ismailia 41522, Egypt)

  • Amnah Mohammed Alsuhaibani

    (Department of Physical Sport Science, College of Education, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia)

  • Afaf Alharthi

    (Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia)

  • Wael A. Hassan

    (Department of Pathology, Faculty of Medicine, Suez Canal University, Ismailia 41522, Egypt
    Department of Basic Sciences, College of Medicine, Sulaiman Alrajhi University, Al Bukayriyah 52726, Saudi Arabia)

  • Karima El-Sayed

    (Medical Physiology Department, Faculty of Medicine, Suez Canal University, Ismailia 41522, Egypt)

Abstract

The prevalence of obesity has risen in the last decades, and it has caused massive health burdens on people’s health, especially metabolic and cardiovascular issues. The risk of vitamin D insufficiency is increased by obesity, because adipose tissue alters both the requirements for and bioavailability of vitamin D. Exercise training is acknowledged as having a significant and long-term influence on body weight control; the favorable impact of exercise on obesity and obesity-related co-morbidities has been demonstrated via various mechanisms. The current work illustrated the effects of vitamin D supplementation and exercise on obesity induced by a high-fat diet (HFD) and hepatic steatosis in rats and explored how fatty acid transport protein-4 (FATP4) and Toll-like receptor-4 antibodies (TLR4) might be contributing factors to obesity and related hepatic steatosis. Thirty male albino rats were divided into five groups: group 1 was fed a normal-fat diet, group 2 was fed an HFD, group 3 was fed an HFD and given vitamin D supplementation, group 4 was fed an HFD and kept on exercise, and group 5 was fed an HFD, given vitamin D, and kept on exercise. The serum lipid profile adipokines, interleukin-6 (IL-6), and tumor necrosis factor-alpha (TNF-α) were analyzed, and the pathological changes in adipose and liver tissues were examined. In addition, the messenger–ribonucleic acid (mRNA) expression of FATP4 and immunohistochemical expression of TLR4 in adipose and liver tissues were evaluated. Vitamin D supplementation and exercise improved HFD-induced weight gain and attenuated hepatic steatosis, along with improving the serum lipid profile, degree of inflammation, and serum adipokine levels. The expression of FATP4 and TLR4 in both adipose tissue and the liver was downregulated; it was noteworthy that the group that received vitamin D and was kept on exercise showed also improvement in the histopathological picture of this group. According to the findings of this research, the protective effect of vitamin D and exercise against obesity and HFD-induced hepatic steatosis is associated with the downregulation of FATP4 and TLR4, as well as a reduction in inflammation.

Suggested Citation

  • Eman Kolieb & Shymaa Ahmed Maher & Mohammed Nader Shalaby & Amnah Mohammed Alsuhaibani & Afaf Alharthi & Wael A. Hassan & Karima El-Sayed, 2022. "Vitamin D and Swimming Exercise Prevent Obesity in Rats under a High-Fat Diet via Targeting FATP4 and TLR4 in the Liver and Adipose Tissue," IJERPH, MDPI, vol. 19(21), pages 1-22, October.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:21:p:13740-:d:950495
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    References listed on IDEAS

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    1. Adela Hruby & Frank Hu, 2015. "The Epidemiology of Obesity: A Big Picture," PharmacoEconomics, Springer, vol. 33(7), pages 673-689, July.
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