2016-09-21T13-13-14Z
Source: Journal of Intercultural Ethnopharmacology
Devendra Kumar, Neerja Trivedi, Rakesh K Dixit.
Aims/Background: This study was evaluated synergistic effect of Polyherbal formulation (PHF) of Allium sativum L., Eugenia jambolana Lam., Momordica charantia L., Ocimum sanctum Linn and Psidium guajava L on p-glycoprotein of intestine. These five herbs were traditionally used for diabetes. These herbs are commonly present in ayurvedic product as antidiabetics in India. Methodology: PHF was prepared by five indigenous herbs. Different doses (50, 100 and 200 mg/kg/day) of was orally administered to Sprague-Dawley rats of different groups for multiple weeks except control groups. Alteration in Pgp expression was evaluated by RT-PCR and western blotting while modulation in activity of Pgp was evaluated using rhodamine 123 as transport substrate by in-situ absorption and everted gut sac method. Results: In PHF pretreated group received 50, 100 and 200 mg/kg/day for seven days, mRNA level decreased by 1.75, 2.45 and 2.37 fold respectively as compared to control. Similarly when PHF at dose of 100 mg/kg/day was given consequently for four weeks maximum decrease in Pgp expression level was observed only after one week and further increase in the treatment duration did not produce significant decrease compared to first week treatment. Pgp mediated transport of rhodamine 123 was significantly decreased with everted gut sac prepared from PHF pretreated rats (one week) compared to those prepared from vehicle treated rats. Conclusions: In conclusion, we report that PHF pretreatment down regulated the expression of intestinal Pgp and this down regulated intestinal Pgp would result in decreased functional activity. Additionally this down regulated Pgp expression might affect the bioavailability of antidiabetic Pgp substrate drugs.
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Τετάρτη 21 Σεπτεμβρίου 2016
Evaluation of the potential effect of Allium sativum, Momordica charantia, Eugenia jambolana, Ocimum sanctum and Psidium guajava on intestinal P-glycoprotein in rats
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