首页> 外文会议>International Forum on Progress on Post-Genome Technologies(5'IFPT); 20070910-11; Suzhou(CN) >Identification of Differentially Expressed Proteins in Rat Bladder Cancer Induced by Terephthalic Acid-Calculi Using a Global Proteomic Approach
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Identification of Differentially Expressed Proteins in Rat Bladder Cancer Induced by Terephthalic Acid-Calculi Using a Global Proteomic Approach

机译:全球蛋白质组学方法鉴定对苯二酸钙诱导的大鼠膀胱癌差异表达蛋白

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摘要

The molecular mechanisms responsible for calculi-associated bladder carcinogenesis are unknown. We compared the protein expression pattern of rat bladder transitional cell cancers (TCCs) induced by terephthalic acid (TPA) with normal bladder tissues using two-dimensional gel electrophoresis (2-DE). Comparative analysis of the respective spot patterns on 2-DE showed 146 spots that were markedly changed in TCC samples. Subsequently, 56 of the variant protein spots were identified by matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF MS). Among them, overexpression of annexin a1 (ANNA1) in rat TCCs was confirmed by Immunohistochemical analysis. Immunohistochemical staining revealed that ANNA1, usually a cytoplasmic protein in normal urothelium, was translocated to the nucleus in rat bladder cancer cells. Our data suggest that overexpression of ANNA1 is involved in bladder carcinogenesis induced by bladder calculi, and that translocation of the protein may be partly responsible for the effect.
机译:导致结石相关性膀胱癌发生的分子机制尚不清楚。我们使用二维凝胶电泳(2-DE)比较了对苯二甲酸(TPA)和正常膀胱组织诱导的大鼠膀胱移行细胞癌(TCC)的蛋白质表达模式。对2-DE上各个斑点图案的比较分析显示,在TCC样品中146个斑点发生了明显变化。随后,通过基质辅助激光解吸/电离飞行时间质谱(MALDI-TOF MS)鉴定了56个变异蛋白斑点。其中,通过免疫组织化学分析证实了大鼠TCC中膜联蛋白a1(ANNA1)的过表达。免疫组织化学染色显示,ANNA1通常是正常尿路上皮中的一种胞质蛋白,已转移到大鼠膀胱癌细胞的细胞核中。我们的数据表明,ANNA1的过表达与膀胱结石诱导的膀胱癌发生有关,该蛋白的易位可能是造成这种作用的部分原因。

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