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首页> 外文期刊>The Laryngoscope: A Medical Journal for Clinical and Research Contributions in Otolaryngology, Head and Neck Medicine and Surgery, Facial Plastic and Reconstructive Surgery .. >Terminal differentiation of epithelial cells in middle ear cholesteatoma: investigation of patterns of expression of protein kinase C-delta and protein kinase C-eta.
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Terminal differentiation of epithelial cells in middle ear cholesteatoma: investigation of patterns of expression of protein kinase C-delta and protein kinase C-eta.

机译:中耳胆脂瘤中上皮细胞的终末分化:蛋白激酶C-δ和蛋白激酶C-eta表达模式的研究。

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OBJECTIVES: The objective of this study was to elucidate the differentiation mechanism of keratinocytes in cholesteatoma. STUDY DESIGN: To achieve the objective, we analyzed the expressions of various cellular proteins: the delta and eta isoforms of protein kinase C (PKCdelta and PKCeta), which are thought to play key roles in signal transduction in differentiation; cytokeratin 1 (CK1) and cytokeratin 10 (CK10) (cytoskeletal constitutive proteins); and involucrin (a marker of differentiation). METHODS: The materials used in this study were tissue specimens obtained from cholesteatoma epidermis, normal external ear canal skin, normal inguinal skin, and psoriatic skin. Immunohistochemical staining techniques were applied to compare the expressions of the above proteins (i.e., PKCdelta, PKCeta, CK1, CK10 and involucrin) in those various tissues. RESULTS: No clear differences in the patterns of expression of PKCdelta and PKCeta were found between the cholesteatoma epidermis and the normal external ear canal skin. These proteins were expressed mainly in the stratum spinosum and stratum granulosum, and their patterns of expression were almost the same as those of the CK1, CK10, and involucrin proteins. CONCLUSION: The findings of this study indicate that the terminal differentiation of keratinocytes in the cholesteatoma epidermis is the same as in normal skin tissues. It was concluded that the growth of epidermis which has undergone hyperproliferation of keratinocytes because of increased levels of various cytokines is being regulated by means of normal terminal differentiation.
机译:目的:本研究的目的是阐明胆脂瘤中角质形成细胞的分化机制。研究设计:为了达到目的,我们分析了各种细胞蛋白的表达:蛋白激酶C的δ和eta亚型(PKCdelta和PKCeta),它们在分化中的信号转导中起关键作用。细胞角蛋白1(CK1)和细胞角蛋白10(CK10)(细胞骨架组成蛋白);和inluclucrin(分化的标志)。方法:本研究中使用的材料是从胆脂瘤表皮,正常外耳道皮肤,正常腹股沟皮肤和牛皮癣皮肤获得的组织标本。免疫组织化学染色技术用于比较上述蛋白质(即PKCdelta,PKCeta,CK1,CK10和整合蛋白)的表达。结果:在胆脂瘤上皮和正常外耳道皮肤之间,PKCdelta和PKCeta的表达方式没有明显差异。这些蛋白主要在棘皮层和颗粒层中表达,它们的表达方式与CK1,CK10和整合蛋白的表达方式几乎相同。结论:本研究结果表明,胆脂瘤表皮中角质形成细胞的终末分化与正常皮肤组织中的相同。可以得出结论,由于各种细胞因子水平的提高,已经经历了角质形成细胞过度增殖的表皮的生长正在通过正常的终末分化来调节。

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