利用全基因组芯片初步筛选亚类垂体腺瘤特异性相关基因

Preliminary greening of specificity-associated genes of pituitary adenoma subtypes by whole genome oligonucleotide microarray

目的 探讨人类垂体腺瘤发生、发展中相关基因的表达与功能.方法 应用人全基因组寡核苷酸芯片HG-U133A2.0检测8例垂体腺瘤组织（生长激素腺瘤、泌乳素腺瘤、促性腺激素腺瘤以及裸细胞激素腺瘤各2例）和2例混合的正常垂体组织的基因表达谱.差异表达基因进行筛选和生物信息学分析.芯片结果予以qRT-PCR验证.结果与正常对照组比较,与垂体腺瘤发生关联的基因功能上主要涉及分子结合、凋亡或肿瘤相关、代谢、信号传导、细胞周期、物质运输等多个牛物过程.数个差异基因的表达特异性与亚类腺瘤的发展相关.结论 垂体腺瘤的发生、发展是一多基因、多分子、多通路的网络调控过程.但对于各亚类腺瘤,其分子机制不尽相同.

Objective To explore the expression and function of correlative genes in the happening and developing of human pituitary adenoma-subtypes.Methods The whole genome oligonucleotide microarray （Affymetrix 133 plus 2.0） was used to examine the gene expressions of pituitary adenoma tissue in 8 patients with pituitary adenoma （2 with growth hormone adenomas,2 with prolactinomas,2 with gonadotroph adenomas and 2 with null cell adenomas） and normal pooled pituitary tissue.Differentially expressed genes were analyzed by Hierarchical method and bioinformatics.A candidate gene was selected to verify the microarray analyzed result by real-time quantitative PCR.Results Compared with associated genes with normal control,associated genes with pituitary adenoma mainly involved in the following biological processes analyzed from the view of function： binding,apoptosis-or-tumor correlation,metabolism,signal-transducer-activity,cell cycle,transcription-regulator-activity and transporter-activity.The specificity of expression in several differential genes was connected to the development of pituitary adenoma-subtypes.Conclusion The development of pituitary adenoma is a complex regulation process involving lots of genes,molecules and pathways.However,the molecular mechanism related to the individual pituitary adenoma-subtypes is different.