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Abstract #6251 Published in IGR 2-2
Effect of cytokines on regulation of the production of transforming growth factor beta-1 in cultured human Tenon's capsule fibroblasts
Denk PO; Roth-Eichhorn S; Gressner AM; Knorr MEuropean Journal of Ophthalmology 2000; 10: 110-115
PURPOSE: Transforming growth factor-β1 (TGF-β1) is thought to play a pivotal role in the regulation of the wound healing process after glaucoma filtering surgery. The aim of the present study was to investigate whether platelet-derived growth factor isoforms (PDGF-AA, PDGF-BB), basic fibroblast growth factor (bFGF), epidermal growth factor (EGF), interleukin-1β (IL-1β) and transforming growth factor-β1 (TGF-β1) modulate the production of latent and/or active TGF-β1 by cultured human Tenon's capsule fibroblasts (HTF). METHODS: Human Tenon's capsule fibroblasts were seeded at two different densities (30 cells/mm2 and 150 cells/mm2) and stimulated for five days with PDGF-AA, PDGF-BB, bFGF, EGF, IL-1β and TGF-β1. Control cells were treated with serum-free medium (WM/F12). The concentrations of latent and active TGF-β1 in the medium were determined using an immunoassay before and after activation of TGF-β1 by transient acidification. RESULTS: The concentration of latent TGF-β1 in conditioned media from HTF seeded at high density (150 cells/mm2) significantly increased after stimulation with 5 ng/ml TGF-β1 (151.5 ± 41.7 pg/ml) or 10 ng/ml IL-1β (45.7 ± 8.1 pg/ml). The concentration of active TGF-β1 in conditioned media also significantly increased after stimulation of HTF with 5 ng/ml TGF-β1 (48.4 ± 27.5 pg/ml). CONCLUSIONS: The present results indicate that TGF-β1 is the most potent inducer of its own synthesis in HTF. Activation of an autocrine TGF-β1 loop may play a role in the wound healing response after glaucoma filtering surgery.
Dr. P.O. Denk, Universitäts-Augenklinik, Schleichstrasse 12, D-72076 Tübingen, Germany
Classification:
12.8.10 Woundhealing antifibrosis (Part of: 12 Surgical treatment > 12.8 Filtering surgery)