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Biosci Biotechnol Biochem. 2009 Nov;73(11):2384-92. Epub 2009 Nov 7.

Huang-Lian-Jie-Du-Tang supplemented with Schisandra chinensis Baill. and Polygonatum odoratum Druce improved glucose tolerance by potentiating insulinotropic actions in islets in 90% pancreatectomized diabetic rats.

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1
Deptartment of Food and Nutrition, College of Natural Science, Hoseo University, Asan-Si, Korea. smpark@hoseo.edu

Abstract

We investigated to determine what effects, if any, the respective water extracts of Radix scutellariae (RS), Fructus schisandrae chinensis (FSC), Huang-Lian-Jie-Du-Tang (HLJDT), and HLJDT supplemented with FSC, and Rhizoma Polygonati odorati (HLJDT-M) would have on glucose tolerance by modulating glucose-stimulated insulin secretion, beta-cell mass, and morphometry in 90% pancreatectomized (Px) diabetic rats fed high-fat diets. Through the elevation of intracellular cAMP levels, FSC RS, HLJDT, and HLJDT-M increased insulin secretion in Min6 cells and GLP-1 secretion in NCI-H716 cells. After an 8-week period of treatment, it was found that HLJDT-M improved glucose tolerance in an oral glucose tolerance test in Px rats. HLJDT-M also potentiated first- and second-phase insulin secretion, but RS and HLJDT elevated only the second phase at hyperglycemic clamp. RS and HLJDT increased beta-cell mass by hyperplasia and hypertrophy, while HLJDT-M increased it only by hyperplasia. The rise in hyperplasia was associated with elevated IRS2 and PDX-1 expression in the islets. In conclusion, HLJDT-M worked as an anti-diabetic prescription by enhancing insulinotropic actions in diabetic rats.

PMID:
19897925
DOI:
10.1271/bbb.90276
[Indexed for MEDLINE]
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