Beneficial effects of rosiglitazone and losartan combination in diabetic rats

Author:

Ateyya Hayam12,Nader Manar A.13,El-Sherbeeny Nagla A.14

Affiliation:

1. College of Pharmacy, Taibah University, El-Madinah El-Munawarah, Saudi Arabia.

2. Department of Clinical Pharmacology, Faculty of Medicine, Cairo University, Egypt.

3. Faculty of Pharmacy, Mansoura University, Egypt.

4. Department of Clinical Pharmacology, Faculty of Medicine, Suez Canal University, Egypt.

Abstract

Diabetes with vascular complication needs strict interventions to retard possible serious complications. This research estimated the possible interaction of rosiglitazone (RGN) with losartan (Los) in diabetic rats. Male Sprague–Dawley rats were randomly divided into nondiabetic rats, diabetic rats, and diabetic rats that received RGN, Los, or a combination of RGN and Los. Measurement of serum glucose, vascular adhesion molecule-1, interleukin-6, tumor necrosis factor-α, aortic lipid peroxide (malondialdehyde), glutathione, superoxide dismutase, and total nitrate/nitrite levels was done. Also, the effects of RGN on the relaxation created by acetylcholine and sodium nitroprusside, contraction of isolated aortic rings provoked by phenylephrine and angiotensin II were determined. Results revealed that RGN or Los had a vasodilating effect to variable degrees indicated by enhanced effects on both acetylcholine-induced relaxation and the antagonistic effect on angiotensin II and phenylephrine-stimulated contraction of diabetic aortas with significant amelioration in serum glucose, vascular adhesion molecule-1, interleukin-6, and tumor necrosis factor-α levels and aortic oxidant/antioxidant balance. Treatment of diabetic rats with a combination of RGN and Los produced a more pronounced effect on the measured parameters compared to the diabetic, RGN-, and Los-treated groups. These findings point out the beneficial effects of RGN and Los combination in diabetic rats.

Publisher

Canadian Science Publishing

Subject

Physiology (medical),Pharmacology,General Medicine,Physiology

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