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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Modulation of pancreatic β-cells in neonatally streptozotocin-induced type 2 diabetic rats by the ethanolic extract of Momordica charantia fruit pulp.
Natural Product Research 2011 Februrary
Effective doses of the Momordica charantia fruit pulp (MCF) ethanolic extract on pancreatic β-cells modulation in neonatally streptozotocin-induced type 2 diabetic rats were studied. Diabetic rats (n=8) were treated with MCF extract (400 mg kg(-1) day(-1)) or glibenclamide (5 mg kg(-1)) for 28 days. Control rats (n=11) and untreated diabetic rats (n=8) received only water. Fasting glucose, serum insulin (by ELISA) and β-cell function (HOMA %B by homeostasis model assessment) were measured. β- and α-cells were identified by immunostaining, nuclei by DAPI, and β-cell size and number by morphometry. Significant improvement of fasting blood glucose, serum insulin and β-cell function was observed with the MCF extract for the diabetic rat model. The islet size, total β-cell area and number of β-cells were increased to almost double in the diabetic rats treated with MCF extract as compared to the untreated diabetic rats. The number of α-cells did not change significantly. Insulin granules in β-cells were notably reduced in diabetic islets as compared to control islets. However, extract-treated diabetic rat β-cells were abundant with insulin granules, which was comparable to non-diabetic control islets. The modulation of pancreatic β-cells may be involved in the experimental observation of anti-diabetic effects of M. charantia extract.
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