Background: Studies have reported that epithelial cell proliferation may be involved in the pathogenesis of nasal polyps (NPs). Estrogen receptor (ER)-α, one type of ER, is related to antiinflammatory action and cell survival in certain tissues. In this study, we examined the presence or absence of ER-α in NPs and healthy inferior turbinate mucosae. We also investigated the effect of dexamethasone on ER-α expression, cell viability, and apoptosis in RPMI 2650 cells. Methods: Immunohistochemical staining and Western blot analysis were conducted to determine the expression of ER-α in 15 NPs and 15 healthy inferior turbinate mucosae. After treating RPMI 2650 cells with dexamethasone, ER-α expression was analyzed using Western blot analysis and cell viability was determined using the MTT assay. Western blot analysis and annexin V-phycoerythrin (PE) staining were used to examine apoptotic cell death. Results: Western blot analysis showed that ER-α expression was upregulated in 13 of the 15 NP tissues. Immunohistochemical staining for ER-α confirmed the results of the Western blot analysis. When RPMI 2650 cells were treated with dexamethasone, both ER-α expression and cell viability were decreased. Furthermore, the treatment of RPMI 2650 cells with dexamethasone increased apoptotic cell death, as shown by increased levels of BAX and cleaved caspase-3, decreased levels of Bcl-2, and an increased percentage of positive annexin V-PE stained cells. Conclusion: ER-α expression was higher in NPs than in healthy inferior turbinate mucosae. When RPMI 2650 cells were treated with dexamethasone, ER-α expression was downregulated, cell viability decreased, and apoptosis increased. The decreased cell viability may be related, at least in part, to the decreased ER-α protein levels, which likely contributed to the induction of apoptotic cell death in RPMI 2650 cells.

Background and ObjectivesZZThe aim of this study was to analyse the radiological anatomic dimensions of the inferior turbinate in patients without deviated nasal septum and compare it to those in the patients with deviated nasal septum using computed tomography. Subjects and MethodZZThe OMU CTs of 98 patients, 196 nostrils with or without deviated nasal septum were evaluated (control group: 42 patients, deviated septum group: 56 patients). The analysis of the CT scans contained the mucosal and bony length, mucosal width of the turbinate and the anterior and posterior mucosal overlay. And also evaluated the cross-sectional area and the type of inferior turbinate bone. ResultsZZAll subjects were divided into three groups: the concave, convex, and control groups. The correlations of fifteen measuring points such as anterior, middle and posterior medial mucosal thickness, total width, bone width, medial mucosa width of inferior turbinate, and area of inferior turbinate bone were significantly different among the groups (concave side ＞ control group ＞ convex side). Of the demographic factors, age was negatively correlated with mucosa and bone length. Types of inferior turbinate bone were as follows: lamella type (38%), combined type (37%), compact type (25%). ConclusionZZThere were statistical differences in some measured anatomical points among the concave, convex, and control groups. Greater septum deviation was correlated with greater degree of hypertrophysm of the inferior turbinate. The age of patients showed negative correlation with inferior turbinate length. Most frequent type of inferior turbinate was lamella type. The results of this study may provide important information when considering turbinate surgery.

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