Abstract
Purpose
To investigate the influence of rosiglitazone on activation of human Tenon’s fibroblasts (HTFs) and to access the possible mechanism.
Methods
Cultured human Tenon’s fibroblasts were pretreated in two different concentrations of rosiglitazone (5 μmol/l and 10 μmol/l) before being stimulated with 5 ng/ml transforming growth factor β1 (TGF-β1). The viability and proliferation of cells were accessed by cell count kit-8 assay; Cell migration was examined by the wound closure assay; Alpha smooth muscle actin (α-SMA), connective tissue growth factor (CTGF) and type I collagen (COL I) transcription were detected by RT-qPCR; The expression and localization of α-SMA protein were examined by Western-blot analysis and Immunofluorescence staining; Western-blot analysis was also used to check the expression of CTGF, COL I peroxisome proliferator-activated receptor gamma (PPAR-γ), and phosphorylation of the signaling protein Smad2/3
Results
Rosiglitazone is able to attenuate the up-regulation of α-SMA, CTGF, and COL I transcription, as well as affect protein expression, proliferation, and migration of cells; rosiglitazone also can increase PPAR-γ expression and attenuate Smad2/3 phosphorylation.
Conclusions
Rosiglitazone can effectively attenuate activation of HTFs induced by TGF-β1 without obvious toxicity. The possible mechanism might be that rosiglitazone interferes with TGF-β/Smad signaling pathway.
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Acknowledgments
The authors would like to acknowledge Jianzhen Fang, Shishen Li, and Jingjia Li, at the central laboratory of 2nd Xiangya Hospital, Central South University, for their technical assistance on this study. The studies were supported by the New Century Talents project grant from the Ministry of Education of China (No. NCET-06-0677) and Hunan Natural Science Foundation (No. 5JJ30051)
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No financial relationship with the organization that sponsored this research exists. The authors have full control of all primary data and agree to allow Graefes Archive for Clinical and Experimental Ophthalmology to review their data upon request.
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Fan, F., Li, Y., Duan, X. et al. Rosiglitazone attenuates activation of human Tenon’s fibroblasts induced by transforming growth factor -β1. Graefes Arch Clin Exp Ophthalmol 250, 1213–1220 (2012). https://doi.org/10.1007/s00417-011-1903-6
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DOI: https://doi.org/10.1007/s00417-011-1903-6