[Gene transcriptome analysis of nasal epithelial cells in chronic rhinosinusitis with nasal polyps].

Objective: To identify the differentially expressed genes in nasal epithelial cells from chronic rhinosinusitis with nasal polyps (CRSwNP), and to analyze related genes which are involved in deficiency of nasal epithelial barrier in CRSwNP patients by analyzing the datasets download from the gene expression omnibus(GEO) database. Methods: The mRNA expression microarray data numbered GSE107624 (7 CRSwNP and 7 controls) and GSE69093 (13 CRSwNP and 11 controls) were downloaded from the publicly available GEO database. These two datasets were jointly analyzed to screen the differentially expressed genes in nasal epithelial cells of controls and CRSwNP patients. In the meanwhile, we further evaluated the function annotation and regulatory pathways of the differentially expressed genes. To further confirmed what we have observed, sinus tissues were collected from patients with CRSwNP (14 cases, 46.8±17.9 years) and uncinate process tissues were collected from patients with nasal septum deviation (7 cases, 23.4±2.3 years) as control group. The primary epithelial cells of nasal mucosa were cultured and the mRNA level of screened genes were measured by Q-PCR. SPSS 22.0 software was used to for statistical analysis. Results: GSE107624 dataset showed that there were 3 856 differentially genes in nasal epithelial cells between CRSwNP and control group, while there were 771 differentially expressed genes in GSE69093 dataset. Finally, 55 up-regulated genes and 3 down-regulated genes were noticed in nasal epithelial cells of CRSwNP patients in the two datasets. GO gene functional annotation analysis showed that SPTBN1, FNBP1L, VAPB and SNX1 were involved in cell adhesion function, MAP1B was participated in the formation of microtubule related complex. KEGG pathway enrichment analysis indicated that BAMBI and SIAH1 were involved in regulation of Wnt pathway, COL6A1 and EIF4E were involved in the regulation of PI3K-AKT pathway. String protein interaction network analysis assumed that MAP1B and VAPB were the core functional proteins. Among top 3 differentially expressed genes COL6A1, MAP1B and BAMBI, only MAP1B gene was increased in nasal epithelial cells of CRSwNP patients in comparison to controls. Conclusion: The increased MAP1B gene in epithelial cells of CRSwNP, as well as abnormal regulation of Wnt and PI3K-AKT signal pathways may mediate the barrier dysfunction in CRSwNP.目的： 通过研究基因表达数据库（gene expression omnibus，GEO）中慢性鼻窦炎伴鼻息肉（CRSwNP）患者与对照组鼻黏膜上皮细胞差异表达基因并分析其功能，寻找参与调控CRSwNP鼻黏膜上皮屏障功能损伤的关键基因。 方法： 2018年6月至2020年5月，从可公开获得的GEO数据库下载编号为GSE107624（7例CRSwNP和7例对照）和GSE69093（13例CRSwNP和11例对照）的mRNA表达芯片数据，对两个数据集进行联合分析，筛选CRSwNP患者鼻黏膜上皮细胞差异表达基因，并对差异基因进行相互作用网络、功能注释和参与调控通路分析，根据基因注释结果筛选参与CRSwNP调控的重要基因。同期，收集首都医科大学附属北京同仁医院耳鼻咽喉头颈外科CRSwNP患者鼻息肉组织（14例，46.8±17.9岁）和鼻中隔偏曲患者的钩突黏膜组织（7例，23.4±2.3岁）作为对照组，对组织进行原代上皮细胞培养，并提取RNA进行实时荧光定量聚合酶链反应（Q-PCR）检测，对筛选出关键基因的mRNA表达水平进行验证。采用SPSS 22.0软件对数据进行统计学分析。 结果： GSE107624数据库中CRSwNP患者与对照组上皮细胞中差异基因为3 856个，GSE69093数据库中为771个。在2个数据库中，CRSwNP患者鼻黏膜上皮细胞同时表达上调的基因共55个，表达下调的基因共3个。对这58个基因进行GO基因功能注释分析发现SPTBN1、FNBP1L、VAPB、SNX1参与细胞黏附功能，MAP1B参与微管相关复合体构成；京都基因与基因组百科全书（Kyoto Encyclopedia of Genes and Genomes，KEGG）通路富集分析发现BAMBI、SIAH1参与调节果蝇无翅/整合素（Wingless/Integrated，Wnt）通路，COL6A1、EIF4E参与调节磷脂酰肌醇3-激酶-丝氨酸/苏氨酸蛋白激酶（PI3K-AKT）通路；String蛋白相互作用网络分析发现微管相关蛋白1B（microtubule associated protein 1B，MAP1B）、VAMP相关蛋白B和C（VAMP associated protein B and C，VAPB）为核心功能蛋白。对筛选出差异倍数前3位基因（COL6A1、MAP1B和BAMBI）进行Q-PCR验证，MAP1B在CRSwNP患者鼻黏膜上皮细胞表达水平升高。 结论： CRSwNP鼻黏膜上皮细胞中表达水平升高的MAP1B基因，以及相关的Wnt、PI3K-AKT信号通路调控异常可能介导了CRSwNP鼻黏膜上皮细胞屏障功能障碍。.