鼻息肉中转化生长因子β亚型的表达及分布

目的：研究转化生长因子β（TGF－β）亚型在鼻息肉组织中的表达和分布，了解其在上呼吸道慢性炎症过程中的作用，探讨鼻息肉病的发病机制。方法：采用免疫组化APAAP法和Western-blot检测25例鼻息肉病患者的息肉组织和下鼻甲粘膜中TGF－β1－3亚型的表达，并以8例健康人下鼻甲粘膜作对照。结果：①TGF－β亚型的表达在鼻息肉病患者的鼻息肉中高于下鼻甲粘膜，而健康人下鼻甲粘膜中几科不能检测到。②在TGF－β亚型中可以检测到大量TGF－β1而很少检测到TGF－β2和TGF－β2。结论：TGF－β1是鼻息肉中TGF－β家族的优势表达亚型，也能在炎性鼻息肉和鼻粘膜中表达。TGF－β1诱导粘膜上皮和结缔组织的多种变化，可能是鼻息肉病发病的重要机制之一。

Significance for the expression of transforming growth factor beta in human nasal polyp and mucosa tissue

Objectives:To explore the pathogenesis of nasal polyposis by examining the expression of transforming growth factor beta (TGF-β) in human inflammatory nasal polyps. 　Methods: Twenty five polyposis patients were selected, tissue TGF-β1～3 from nasal polyps and inferior turbinate mucosa were determined with immunohistochemistry APAAP method .The inferior turbinate mucosa from eight healthy volunteers were selected as control. Six polyp tissues were estimated with western-blot analyses to compare the characteristics of TGF-beta isoforms expression. 　Results: ①The expression of TGF-β1～3 in nasal polyps was significantly higher than that in nasal mucosa, it was undetectable in nasal mucosa from healthy volunteers;②TGF-β1 was the main isoform detected in nasal polyps. 　Conclusions: TGF-β, especially TGF-β1 is strongly expressed in inflammatory nasal polyps and its mucosa. TGF-β could induce modification of epithelium and connective tissue and therefore be involved in the pathogenesis of nasal polyposis.