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PM · Lens · Polyherbal Formulation Improves Glucose‑Lipid Metabolism and Prevent Hepatotoxicity in Streptozotocin‑Induced Diabetic Rats: Plausible Role of IRS-PI3K-Akt-GLUT2 Signaling

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Article · Volume 18, Issue 77 · pp. 52–65

Polyherbal Formulation Improves Glucose‑Lipid Metabolism and Prevent Hepatotoxicity in Streptozotocin‑Induced Diabetic Rats: Plausible Role of IRS-PI3K-Akt-GLUT2 Signaling

Abdul Haye1, Mohd Asif Ansari1, Abhinav Saini2, Zubair Ahmed3, Kavita Munjal4, Yasmeen Shamsi5, Manju Sharma1

  1. 1Department of Pharmacology, School of Pharmaceutical Education and Research, India.
  2. 2Department of Biophysics, All India Institute of Medical Sciences, India.
  3. 3Department of Pharmaceutics, School of Pharmaceutical Education and Research, India.
  4. 4Department of Pharmacy, MM College of Pharmacy, MM University (Deemed to be University), Ambala, Haryana, India.
  5. 5Department of Moalejat, School of Unani Medical Education and Research, New Delhi, India.

Abstract

Objectives: The purpose of this research was to find out the plausible mechanisms underlying the synergistic effects of PHF in an experimental setting of diabetes mellitus.Materials and Methods: PHF was evaluated for the presence of residual toxins, acute oral toxicity, and its effects on carbohydrate digestive enzymes. PHF (100, 200, and 300 mg/kg/p. o., respectively) was used to treat streptozotocin‑induced diabetic rats for 12 weeks followed by glycemic, histopathological, biochemical, and ultrastructural changes measurement. mRNA levels of AMPK, insulin receptor substrate (IRS), phosphoinositide‑3‑phosphate kinase (PI3K), Akt, and glucose transporter 2 (GLUT2) were measured using real‑time polymerase chain reaction.Results: In PHF, the residual toxins were absent. PHF inhibited the α‑amylase (IC50 152.2 ± 9.3 µg/mL), and α‑glucosidase (IC50 103.0 ± 0.81 µg/mL) activities in‑vitro. Further, up to a dose of 2000 mg/kg, PHF showed no signs of mortality. PHF treatment significantly maintained the glycemic state, antioxidant status, lipid profile, hepatic‑architecture, and ultrastructural alterations in diabetic rats. Similarly, diabetic rats showed detrimental effects on the mRNA level of AMPK and IRS‑PI3K‑Akt‑GLUT2 signaling which were attenuated by PHF treatment. Immunohistochemical analysis also revealed an improvement in p‑Akt expression after PHF treatment.Conclusion: In streptozotocin‑induced diabetic rats, PHF improves glucose and lipid metabolism by attenuating hyperglycemia, hyperinsulinemia, dyslipidemia, insulin resistance, oxidative stress, inflammation, and deterioration of hepatic architecture possibly through AMPK mediated improvement in hepatic IRS‑PI3K‑Akt‑GLUT2 signaling pathway.

Keywords: Glucose‑lipid metabolism; hepatic insulin signaling; oxidative stress; polyherbal formula; streptozotocin‑induced diabetes; transmission electron microscopy

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