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Abstract #94453 Published in IGR 22-2
Potential roles of the IL-6 family in conjunctival fibrosis
Watanabe-Kitamura F; Ogawa A; Fujimoto T; Iraha S; Inoue-Mochita M; Watanabe T; Takahashi E; Tanihara H; Inoue TExperimental Eye Research 2021; 210: 108708
Elevated intraocular pressure (IOP) is a significant risk factor for vision loss due to glaucoma, which is a major cause of blindness worldwide. Glaucoma filtration surgery (GFS) is an important method to reduce IOP by guidance of aqueous humor into a newly built filtration bleb in the conjunctiva; management of the wound healing mechanism is essential for the success of GFS. Here, we investigated the roles of interleukin (IL)-6 family members during the wound healing process after GFS. At the surgical site, the expression levels of genes encoding IL-6, oncostatin M (OSM), their receptors, and collagen I were elevated at 3 h after GFS, whereas the levels of genes encoding transforming growth factor (TGF)-β, α-smooth muscle actin (SMA), type IV collagen, and fibronectin were elevated at 3 days after GFS. IL-6 trans-signaling and OSM signaling suppressed TGF-β-induced expression of α-SMA and collagen IV, as well as activation of the non-canonical TGF-β pathway, suggesting that IL-6 and OSM may aid in controlling the phase transition from inflammation to proliferation and remodeling. The suppressive effects of OSM were accompanied by STAT3 activation, such that STAT1 function was complementary to STAT3. Taken together, these observations indicated that IL-6 family members constitute early response genes after GFS, which can suppress TGF-β-induced expression of late response genes at the surgical site after GFS.
Department of Ophthalmology, Faculty of Life Sciences, Kumamoto University, Kumamoto, 860-8556, Japan.
Full articleClassification:
12.8.10 Woundhealing antifibrosis (Part of: 12 Surgical treatment > 12.8 Filtering surgery)
3.6 Cellular biology (Part of: 3 Laboratory methods)
