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- Title
Functional Characteristics of Connective Tissue Growth Factor on Vitreoretinal Cells.
- Authors
Kita, Takeshi; Hata, Yasuaki; Miura, Muneki; Kawahara, Shuhei; Nakao, Shintaro; Ishibashi, Tatsuro
- Abstract
Connective tissue growth factor (CTGF) level is elevated in eyes with proliferative vitreoretinal diseases, such as proliferative diabetic retinopathy and proliferative vitreoretinopathy (PVR), as we previously reported, but its functional characteristics on vitreoretinal cells are yet to be clarified. In this study, we demonstrated a growth-promoting effect of CTGF on cultured hyalocytes and bovine retinal pigment epithelial cells (BRPEs) with the induction of p44/p42 mitogen-activated protein kinase phosphorylation and [³H]thymidine incorporation. CTGF also stimulated the synthesis of fibronectin by hyalocytes and BRPEs without significant effect on collagen gel contraction by these cells. On the other hand, CTGF had no direct effects on the proliferation, migration, or in vitro tube formation by vascular endothelial cells. Nevertheless, CTGF promoted vascular endothelial growth factor (VEGF) gene expression by hyalocytes and BRPEs. Although the concentrations of both CTGF and VEGF in the human vitreous samples with proliferative vitreoretinal diseases were elevated, there was no significant correlation between these concentrations. These findings indicate that CTGF appears to be involved in the formation of proliferative membranes without direct regulation of their cicatricial contraction in the pathogenesis of proliferative vitreoretinal diseases. Whereas CTGF might have no direct effects or minimal effects, if any, on retinal neovascularization, it is possible that CTGF has indirect effects by modulating the expression of VEGF. Diabetes 56:1421-1428, 2007
- Subjects
CONNECTIVE tissue development; VITREOUS body diseases; DIABETIC retinopathy; PROLIFERATIVE vitreoretinopathy; PROTEIN kinases; VASCULAR endothelial growth factors
- Publication
Diabetes, 2007, Vol 56, Issue 5, p1421
- ISSN
0012-1797
- Publication type
Article
- DOI
10.2337/db06-1644