Péter Csomor1, István Sziklai, Tamás Karosi. 1. Department of Otolaryngology Head and Neck Surgery, Medical and Health Scinece Center, University of Debrecen, Debrecen, Hungary.
Abstract
HYPOTHESIS: Otosclerosis is an inflammatory bone remodeling disorder of the human otic capsule, which might be characterized by variable levels and unique expression pattern of TNF-alpha receptors. BACKGROUND: Histologic characteristics of otosclerosis have been well described during the latest decades; however, the grading of different histopathologic and clinical stages has not been attributed precisely to the molecular biology of the pathologically increased metabolism of osteoclast-osteoblast axis. METHODS: Forty otosclerotic- and 40 nonotosclerotic ankylotic stapes footplates (n = 80; men, 29; women, 51) were histologically analyzed: conventional hematoxylin-eosin staining and tumor necrosis factor-alpha receptor I and II (TNFRI/II)-specific immunofluorescent assay was performed. RESULTS: Active otosclerosis (Grades I-II; n = 24) was featured by increased expression of TNFRII and moderate expression of TNFRI; inactive cases (Grades III-IV) were characterized by permanent expression of TNFRI; however, TNFRII-specific immunoreaction was absent. Nonotosclerotic stapes specimens showed a negligible TNFR expression. Tumor necrosis factor receptor expression pattern showed a strong correlation with the histologic activity of otosclerosis (chi2 test; p < 0.001). CONCLUSION: Detection of elevated TNFR expression demonstrates activated osteoclast metabolism and inflammatory pathways in otosclerosis. Different etiopathogenesis of otosclerotic and nonotosclerotic stapes ankylosis should be distinguished. Administration of monoclonal anti-TNF-alpha antibody may be a reasonable option in the medical treatment of active stages of otosclerosis.
HYPOTHESIS: Otosclerosis is an inflammatory bone remodeling disorder of the human otic capsule, which might be characterized by variable levels and unique expression pattern of TNF-alpha receptors. BACKGROUND: Histologic characteristics of otosclerosis have been well described during the latest decades; however, the grading of different histopathologic and clinical stages has not been attributed precisely to the molecular biology of the pathologically increased metabolism of osteoclast-osteoblast axis. METHODS: Forty otosclerotic- and 40 nonotosclerotic ankylotic stapes footplates (n = 80; men, 29; women, 51) were histologically analyzed: conventional hematoxylin-eosin staining and tumor necrosis factor-alpha receptor I and II (TNFRI/II)-specific immunofluorescent assay was performed. RESULTS:Active otosclerosis (Grades I-II; n = 24) was featured by increased expression of TNFRII and moderate expression of TNFRI; inactive cases (Grades III-IV) were characterized by permanent expression of TNFRI; however, TNFRII-specific immunoreaction was absent. Nonotosclerotic stapes specimens showed a negligible TNFR expression. Tumor necrosis factor receptor expression pattern showed a strong correlation with the histologic activity of otosclerosis (chi2 test; p < 0.001). CONCLUSION: Detection of elevated TNFR expression demonstrates activated osteoclast metabolism and inflammatory pathways in otosclerosis. Different etiopathogenesis of otosclerotic and nonotosclerotic stapes ankylosis should be distinguished. Administration of monoclonal anti-TNF-alpha antibody may be a reasonable option in the medical treatment of active stages of otosclerosis.
Authors: Alicia M Quesnel; Reuven Ishai; Sebahattin Cureoglu; Fred Linthicum; Ivan A Lopez; Joseph B Nadol; Michael J McKenna Journal: Otol Neurotol Date: 2016-04 Impact factor: 2.311
Authors: Balázs Liktor; Zoltán Szekanecz; Tamás József Batta; István Sziklai; Tamás Karosi Journal: Eur Arch Otorhinolaryngol Date: 2012-07-29 Impact factor: 2.503