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Antidiabetic effects of pterosin A, a small-molecular-weight natural product, on diabetic mouse models.

Abstract
The therapeutic effect of pterosin A, a small-molecular-weight natural product, on diabetes was investigated. Pterosin A, administered orally for 4 weeks, effectively improved hyperglycemia and glucose intolerance in streptozotocin, high-fat diet-fed, and db/db diabetic mice. There were no adverse effects in normal or diabetic mice treated with pterosin A for 4 weeks. Pterosin A significantly reversed the increased serum insulin and insulin resistance (IR) in dexamethasone-IR mice and in db/db mice. Pterosin A significantly reversed the reduced muscle GLUT-4 translocation and the increased liver phosphoenolpyruvate carboxyl kinase (PEPCK) expression in diabetic mice. Pterosin A also significantly reversed the decreased phosphorylations of AMP-activated protein kinase (AMPK) and Akt in muscles of diabetic mice. The decreased AMPK phosphorylation and increased p38 phosphorylation in livers of db/db mice were effectively reversed by pterosin A. Pterosin A enhanced glucose uptake and AMPK phosphorylation in cultured human muscle cells. In cultured liver cells, pterosin A inhibited inducer-enhanced PEPCK expression, triggered the phosphorylations of AMPK, acetyl CoA carboxylase, and glycogen synthase kinase-3, decreased glycogen synthase phosphorylation, and increased the intracellular glycogen level. These findings indicate that pterosin A may be a potential therapeutic option for diabetes.
AuthorsFeng-Lin Hsu, Chun-Fa Huang, Ya-Wen Chen, Yuan-Peng Yen, Cheng-Tien Wu, Biing-Jiun Uang, Rong-Sen Yang, Shing-Hwa Liu
JournalDiabetes (Diabetes) Vol. 62 Issue 2 Pg. 628-38 (Feb 2013) ISSN: 1939-327X [Electronic] United States
PMID23069626 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
Chemical References
  • Biological Products
  • Glucose Transporter Type 4
  • Indans
  • Insulin
  • Sesquiterpenes
  • Slc2a4 protein, mouse
  • pterosin
  • Dexamethasone
  • Glucose
Topics
  • Animals
  • Biological Products (therapeutic use)
  • Biological Transport (drug effects)
  • Cells, Cultured
  • Dexamethasone (adverse effects)
  • Diabetes Mellitus, Experimental (drug therapy)
  • Diabetes Mellitus, Type 2 (drug therapy)
  • Disease Models, Animal
  • Glucose (metabolism)
  • Glucose Intolerance (drug therapy)
  • Glucose Transporter Type 4 (metabolism)
  • Humans
  • Hyperglycemia (drug therapy)
  • Indans (therapeutic use)
  • Insulin (blood)
  • Insulin Resistance (physiology)
  • Liver (enzymology)
  • Male
  • Mice
  • Muscle, Skeletal (drug effects)
  • Sesquiterpenes (therapeutic use)

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