The ethanol extract of Zingiber zerumbet rhizomes mitigates vascular lesions in the diabetic retina

Vascular Pharmacology
Tang-Yao HongI-Min Liu

Abstract

Diabetic retinopathy (DR) is a common diabetic eye disease which is well-known as the result of microvascular retinal changes. Although the ethanol extract from Zingiber zerumbet (L.) Smith rhizome (EEZZR) has been indicated to ameliorate hyperglycemia in diabetes, its protective effect on DR remains unclear. The aim of this study was to determine the effects of EEZZR on DR in streptozotocin (STZ) diabetic rats. Diabetic rats were treated orally with EEZZR (200, 300 mg/kg per day) or calcium dobesilate (CD; 500 mg/kg per day) for 12 weeks. EEZZR displayed similar characteristics to CD in reducing blood-retinal barrier permeability in diabetic rats. Retinal histopathological observation showed that retinal vessels were decreased in EEZZR-treated diabetic rats. EEZZR decreased the increased retinal expression of vascular endothelial growth factor (VEGF) and upregulate the expressions of renal pigment epithelium-derived factor (PEDF) in diabetic rats. Retinal mRNA expression of tumor necrosis factor-α, interleukin (IL)-1, IL-6, monocyte chemotactic proteins-1, intercellular adhesion molecule-1 and vascular cell adhesion molecule-1 were all decreased in EEZZR-treated diabetic rats. Moreover, EEZZR could attenuate phosphorylation of...Continue Reading

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Citations

Jan 6, 2017·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Sandeep Vasant MoreDong-Kug Choi
Oct 5, 2017·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Katayoon KalantariRosfarizan Mohamad
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