Expression of Angiogenic and Fibrogenic Factors in Proliferative Vitreoretinal Disorders

Overview

Journal Int Ophthalmol

Specialty Ophthalmology

Date 2007 Mar 22

PMID 17375263

Citations 18

Authors

Ahmed M Abu El-Asrar

Philippe E Van den Steen

Saleh A Al-Amro

Luc Missotten

Ghislain Opdenakker

Karel Geboes

Affiliations

Soon will be listed here.

Abstract

Purpose: To investigate the expression of connective tissue growth factor (CTGF) in the retina of human subjects with diabetes mellitus, and CTGF, CD105, and gelatinase B in proliferative diabetic retinopathy (PDR) and proliferative vitreoretinopathy (PVR) epiretinal membranes.

Methods: Twelve donor eyes from six subjects with diabetes mellitus, 10 eyes from five nondiabetic subjects, 14 PDR membranes, and five PVR membranes were studied by immunohistochemical techniques. In situ zymography was used to examine gelatinolytic activity in four PDR membranes.

Results: In nondiabetic retinas, there was no immunoreactivity for CTGF. Diabetic retinas showed immunoreactivity for CTGF in ganglion cells and microglia. Vascular endothelial cells in PDR membranes expressed CTGF, CD105, and gelatinase B in 10 (71.4%), 11 (78.6%), and 5 (35.7%) membranes, respectively. Myofibroblasts in PDR membranes expressed CTGF, and gelatinase B in 14 (100%), and 6 (42.9%) membranes, respectively. There was a significant correlation between the number of blood vessels expressing the panendothelial marker CD34 and the number of blood vessels expressing CTGF (r = 0.7884; P = 0.0008), and CD105 (r = 0.6901; P = 0.0063), and the number of myofibroblasts expressing CTGF (r = 0.5922; P = 0.0257). There was a significant correlation between the number of myofibroblasts expressing alpha-smooth muscle actin and the number of myofibroblasts expressing CTGF (r = 0.8393; P = 0.0002). In situ zymography showed the presence of gelatinolytic activity in vascular endothelial cells in PDR membranes. Myofibroblasts in PVR membranes expressed CTGF, and gelatinase B.

Conclusions: These results suggest a possible role of CTGF, CD105, and gelatinase B in the pathogenesis of proliferative vitreoretinal disorders.

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