title: Jab1 expression is associated with TGF-β1 signaling in chronic rhinosinusitis and nasal polyposis.
abstract: Jab1, which is a fifth component of COP9 signalosome, plays an essential role in cell growth and proliferation. Jab1 is also shown to regulate transforming growth factor-beta (TGF-β) signaling in carcinoma cells. The aim of the present study was to investigate the expression and the correlation of Jab1 and TGF-β1 in chronic rhinosinusitis and nasal polyposis. Here, we show the elevated expression of Jab1 and TGF-β1 in diseased mucosa without nasal polyps and a correlation between Jab1 and TGF-β1 expression. Forty-six samples (26 patients with nasal polyps, 10 patients with chronic rhinosinusitis and 10 control subjects) were included to this study. Immunohistochemistry and Western blotting were performed for the assessment of Jab1 and TGF-β1 localization and the expression of proteins. Double staining of both proteins showed that Jab1 and TGF-β1 were colocalized in the epithelium, inflammatory cells and the vascular endothelium of nasal mucosa. There was a significant increase in the expression of TGF-β1 and Jab1 in patients without nasal polyps and a significant decrease in patients with nasal polyps compared to controls. Moreover, correlation was detected between the expression of Jab1 and TGF-β1 in chronic rhinosinusitis and nasal polyposis. Our results demonstrate that chronic rhinosinusitis is characterized by elevated expression of Jab1 and TGF-β1 compared to nasal polyposis and Jab1 may play a vital role in the pathogenesis of both chronic rhinosinusitis and nasal polyposis.
authors.affiliation: Department of Histology and Embryology, Faculty of Medicine, Gaziosmanpasa University, Tokat, Turkey. sevilcayli@yahoo.com
authors.forename: Sevil
authors.initials: S
authors.lastname: Cayli
authors.forename: Ahmet
authors.initials: A
authors.lastname: Eyibilen
authors.forename: Levent
authors.initials: L
authors.lastname: Gurbuzler
authors.forename: Sema
authors.initials: S
authors.lastname: Koc
authors.forename: Gulsen Arslan
authors.initials: GA
authors.lastname: Atay
authors.forename: Adnan
authors.initials: A
authors.lastname: Ekici
authors.forename: Ibrahim
authors.initials: I
authors.lastname: Aladağ
mesh_terms: D000293:Adolescent; D000328:Adult; D000075686:COP9 Signalosome Complex; D002908:Chronic Disease; D005260:Female; D006801:Humans; D047908:Intracellular Signaling Peptides and Proteins / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D009298:Nasal Polyps / Q000378:metabolism* / Q000473:pathology; D010447:Peptide Hydrolases / Q000096:biosynthesis / Q000378:metabolism*; D012220:Rhinitis / Q000378:metabolism* / Q000473:pathology; D015398:Signal Transduction; D053773:Transforming Growth Factor beta1 / Q000096:biosynthesis / Q000378:metabolism*; D055815:Young Adult
chemical_list: D047908:Intracellular Signaling Peptides and Proteins; D053773:Transforming Growth Factor beta1; D010447:Peptide Hydrolases; C501488:COPS5 protein, human; D000075686:COP9 Signalosome Complex