Proteomic Analysis Reveals the Renoprotective Effect of <i>Tribulus terrestris</i> against Obesity-Related Glomerulopathy in Rats

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  • Jiang Yue-Hua
    Central Laboratory, Affiliated Hospital of Shandong University of Traditional Chinese Medicine
  • Jiang Ling-Yu
    First Clinical Medical College, Shandong University of Traditional Chinese Medicine
  • Wu Sai
    Department of Cardiovascular, Qingdao Hiser Medical Group
  • Jiang Wen-Jun
    Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Therapy of Ocular Diseases in Universities of Shandong
  • Xie Lifang
    Susan Samueli Integrative Health Institute, School of Medicine, Univeristy of California, Irvine
  • Li Wei
    Department of Nephrology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine
  • Yang Chuan-Hua
    Department of Cardiovascular, Affiliated Hospital of Shandong University of Traditional Chinese Medicine

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  • Proteomic Analysis Reveals the Renoprotective Effect of Tribulus terrestris against Obesity-Related Glomerulopathy in Rats

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Abstract

<p>Tribulus terrestris L. (Zygophyllaceae) (TT) is usually used as a cardiotonic, diuretic, and aphrodisiac, as well as for herbal post-stroke rehabilitation in traditional Chinese medicine. However, little is known about the renoprotective effects of TT on obesity-related glomerulopathy (ORG). In this study, 340 monomeric compounds were identified from TT extracts obtained with ethyl acetate combined with 50% methanol. In vitro, IC50 of TT was 912.01 mg/L, and the appropriate concentration of TT against oxidized-low density lipoprotein (ox-LDL) induced human renal glomerular endothelial cells (HRGECs) was 4 mg/L. TT significantly increased the viability (63.2%) and migration (2.33-fold increase) of HRGECs. ORG model rats were induced by a chronic high-fat diet (45%) for 20 weeks and were then treated with TT extract (2.8 g/kg/d) for 8 weeks. Subsequently, the kidneys were removed and their differentially expressed protein profile was identified using two-dimensional electrophoresis coupled with matrix-assisted laser desorption/ionization-time of flight (MALDI-TOF)-TOF MS. Molecular categorization and functional analysis of bioinformatic annotation suggested that excessive energy metabolism, decreased response to stress and low immunity were the potential etiologies of ORG. After TT administration for 8 weeks, body weight, blood pressure, serum cystatin C and cholesterol were decreased. Additionally, TT significantly enhanced the resistance of rats to ORG, decreased energy consumption and the hemorrhagic tendency, and improved the response to acute phase reactants and immunity. In conclusion, TT may play a protective role against ORG in rats.</p>

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