Kyoung Yul Seo1, Hyung Keun Lee, Eung Kweon Kim, Joon H Lee. 1. Department of Ophthalmology, Yonsei Institute of Vision Research, Brain Korea 21 Project for Medical Sciences, Yonsei University College of Medicine, Seoul, Korea.
Abstract
BACKGROUND: Surgically induced necrotizing scleritis is primarily managed with immunosuppressive regimens. Such treatments can alter inflammatory cytokines and products such as tumor necrosis factor-alpha (TNF-alpha) and matrix metalloproteinase-9 (MMP-9), which are an important proinflammatory cytokine and a tissue-degrading protease involved in necrosis of some ocular tissues. OBJECT: To evaluate TNF-alpha and MMP-9 in the tear or sclera of surgically induced necrotizing scleritis. METHODS: After tear collection from healthy and diseased eyes of 2 patients, immunoblot analysis using monoclonal antibody specific for human TNF-alpha and MMP-9 was performed. In another patient, scleral tissues were obtained during scleral allograft surgery, and the same immunoblot analysis was done. RESULTS: The level of TNF-alpha and MMP-9 was increased in tear fluid from patients compared to that of control volunteers and returned to the control level after treatment. The diseased sclera showed an increased expression of MMP-9 compared to that of the normal donor sclera. CONCLUSIONS: TNF-alpha and MMP-9 may suggest disease activity of surgically induced necrotizing scleritis and can be altered by proper immunosuppressive treatment.
BACKGROUND: Surgically induced necrotizing scleritis is primarily managed with immunosuppressive regimens. Such treatments can alter inflammatory cytokines and products such as tumor necrosis factor-alpha (TNF-alpha) and matrix metalloproteinase-9 (MMP-9), which are an important proinflammatory cytokine and a tissue-degrading protease involved in necrosis of some ocular tissues. OBJECT: To evaluate TNF-alpha and MMP-9 in the tear or sclera of surgically induced necrotizing scleritis. METHODS: After tear collection from healthy and diseased eyes of 2 patients, immunoblot analysis using monoclonal antibody specific for humanTNF-alpha and MMP-9 was performed. In another patient, scleral tissues were obtained during scleral allograft surgery, and the same immunoblot analysis was done. RESULTS: The level of TNF-alpha and MMP-9 was increased in tear fluid from patients compared to that of control volunteers and returned to the control level after treatment. The diseased sclera showed an increased expression of MMP-9 compared to that of the normal donor sclera. CONCLUSIONS:TNF-alpha and MMP-9 may suggest disease activity of surgically induced necrotizing scleritis and can be altered by proper immunosuppressive treatment.