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Abstract Title:

Puerarin protects against high glucose-induced acute vascular dysfunction: role of heme oxygenase-1 in rat thoracic aorta.

Abstract Source:

Vascul Pharmacol. 2009 Mar-Apr;50(3-4):110-5. Epub 2008 Nov 24. PMID: 19073281

Abstract Author(s):

Xiang-hong Meng, Chao Ni, Li Zhu, Yue-liang Shen, Lin-lin Wang, Ying-ying Chen

Article Affiliation:

Xiang-hong Meng

Abstract:

OBJECTIVE: To investigate the antioxidant and vascular protective effect of puerarin, an isoflavone glycoside known in traditional Chinese medicine on vascular reactivity subsequent to high glucose stress.

METHODS: The thoracic aortic rings with or without endothelium from male SD rats were mounted in an organ bath. Isometric contraction of aortic rings was measured. HO-1 protein expression and HO activity were also evaluated.

RESULTS: (1) After incubation with 44 mmol/L of high glucose for 2 or 4 h, the vascular contraction responses to phenylephrine (PE) and relaxation response to acetylcholine (Ach) decreased in an endothelium-dependent manner; (2) Coincubation with puerarin (10(-10)-10(-8) mol/L) and high glucose, the high glucose-induced vasoconstriction and vasodilation dysfunction was partly inhibited in a dose-dependent manner; (3) Puerarin increased the HO-1 protein expression and HO activity of thoracic aorta. ZnPP (an inhibitor of heme oxygenase-1) offset the protective effect of puerarin.

CONCLUSION: Puerarin could alleviate the high glucose-induced acute endothelium-dependent vascular dysfunction in rat aortic rings. HO-1 activity was proposed as a mechanism to account for the protection of vascular responses by puerarin.

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