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10.1371/journal.pone.0172592 http://scihub22266oqcxt.onion/10.1371/journal.pone.0172592 C5322922!5322922 !28231275     free     free     free Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=28231275 &cmd=llinks): Failed to open stream: HTTP request failed! 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Suppression of TGF-? pathway by pirfenidone decreases extracellular matrix deposition in ocular fibroblasts in vitro |pdf=|usr=}}{{28231275 }} gab.com Text Suppression of TGF- pathway by pirfenidone decreases extracellular matrix deposition in ocular fibroblasts in vitro JO: PLoS One http://www.kidney.de/pget.php?&tw=1&pmid=28231275 #FOAvip In glaucoma surgery, fibrotic processes occur, leading to impairment of liquid outflow. Activated fibroblasts are responsible for postoperative scarring. The transforming growth factor-? (TGF-?) pathway plays a key role in fibroblast function, differentiation and proliferation. The aim of this study was the characterization of the fibrotic potential of two subtypes of primary human ocular fibroblasts and the attempt to inhibit fibrotic processes specifically, without impairing cell viability. For fibrosis inhibition we focused on the small molecule pirfenidone, which has been shown to prevent pulmonary fibrosis by the decrease of the expression of TGF-?1, TGF-?2 and TGF-?3 cytokines. For in vitro examinations, isolated human primary fibroblasts from Tenon capsule and human intraconal orbital fat tissues were used. These fibroblast subpopulations were analyzed in terms of the expression of matrix components responsible for postoperative scarring. We concentrated on the expression of collagen I, III, VI and fibronectin. Additionally, we analyzed the expression of ?-smooth muscle actin, which serves as a marker for fibrosis and indicates transformation of fibroblasts into myofibroblasts. Gene expression was analyzed by rtPCR and synthesized proteins were examined by immunofluorescence and Western blot methods. Proliferation of fibroblasts under different culture conditions was assessed using BrdU assay. TGF-?1 induced a significant increase of cell proliferation in both cell types. Also the expression of some fibrotic markers was elevated. In contrast, pirfenidone decreased cell proliferation and matrix synthesis in both fibroblast subpopulations. Pirfenidone slightly attenuated TGF-?1 induced expression of fibronectin and ?-smooth muscle actin in fibroblast cultures, without impairing cell viability. To summarize, manipulation of the TGF-? signaling pathway by pirfenidone represents a specific antifibrotic approach with no toxic side effects in two human orbital fibroblast subtypes. We presume that pirfenidone is a promising candidate for the treatment of fibrosis following glaucoma surgery. Twit Text FOAVip Suppression of TGF- pathway by pirfenidone decreases extracellular matrix deposition in ocular fibroblasts in vitro ????PLoS One http://www.kidney.de/pget.php?&tw=1&pmid=28231275 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=28231275 #FOAvip English Wikipedia <ref>{{Cite pmid|28231275 }}</ref> Suppression of TGF-? pathway by pirfenidone decreases extracellular matrix deposition in ocular fibroblasts in vitro #MMPMID28231275 Stahnke T ; Kowtharapu BS ; Stachs O ; Schmitz KP ; Wurm J ; Wree A ; Guthoff RF ; Hovakimyan M PLoS One 2017[]; 12 (2 ): e0172592 PMID28231275 show ga In glaucoma surgery, fibrotic processes occur, leading to impairment of liquid outflow. Activated fibroblasts are responsible for postoperative scarring. The transforming growth factor-? (TGF-?) pathway plays a key role in fibroblast function, differentiation and proliferation. The aim of this study was the characterization of the fibrotic potential of two subtypes of primary human ocular fibroblasts and the attempt to inhibit fibrotic processes specifically, without impairing cell viability. For fibrosis inhibition we focused on the small molecule pirfenidone, which has been shown to prevent pulmonary fibrosis by the decrease of the expression of TGF-?1, TGF-?2 and TGF-?3 cytokines. For in vitro examinations, isolated human primary fibroblasts from Tenon capsule and human intraconal orbital fat tissues were used. These fibroblast subpopulations were analyzed in terms of the expression of matrix components responsible for postoperative scarring. We concentrated on the expression of collagen I, III, VI and fibronectin. Additionally, we analyzed the expression of ?-smooth muscle actin, which serves as a marker for fibrosis and indicates transformation of fibroblasts into myofibroblasts. Gene expression was analyzed by rtPCR and synthesized proteins were examined by immunofluorescence and Western blot methods. Proliferation of fibroblasts under different culture conditions was assessed using BrdU assay. TGF-?1 induced a significant increase of cell proliferation in both cell types. Also the expression of some fibrotic markers was elevated. In contrast, pirfenidone decreased cell proliferation and matrix synthesis in both fibroblast subpopulations. Pirfenidone slightly attenuated TGF-?1 induced expression of fibronectin and ?-smooth muscle actin in fibroblast cultures, without impairing cell viability. To summarize, manipulation of the TGF-? signaling pathway by pirfenidone represents a specific antifibrotic approach with no toxic side effects in two human orbital fibroblast subtypes. We presume that pirfenidone is a promising candidate for the treatment of fibrosis following glaucoma surgery. |Actins/analysis/genetics [MESH] |Anti-Inflammatory Agents, Non-Steroidal/*pharmacology [MESH] |Cell Proliferation/*drug effects [MESH] |Cells, Cultured [MESH] |Extracellular Matrix/drug effects/genetics/metabolism/pathology [MESH] |Fibroblasts/cytology/*drug effects/metabolism/*pathology [MESH] |Fibronectins/analysis/genetics [MESH] |Fibrosis [MESH] |Gene Expression Regulation/drug effects [MESH] |Humans [MESH] |Pyridones/*pharmacology [MESH] |Signal Transduction/*drug effects [MESH]Suppression of TGF-? pathway by pirfenidone decreases extracellular ma(epmc).pdf DeepDyve Pubget Overpricing