Elchuri Sailaja, Naeemuddin Mohammed, Sharpe Orr, Robinson William H, Huang Ting-Ting
Department of Neurology and Neurological Sciences, Stanford University, Stanford, CA, USA.
Proteomics. 2007 Jun;7(12):2121-9. doi: 10.1002/pmic.200601011.
To identify biomarkers associated with the development of hepatocellular carcinoma (HCC) in CuZn superoxide dismutase (CuZnSOD, Sod1) deficient mice, 2-DE followed by MS analysis was carried out with liver samples obtained from 18-month-old Sod1-/- and +/+ mice. The intracellular Ca binding protein, regucalcin (RGN), showed a divergent alteration in Sod1-/- samples. Whereas elevated RGN levels were observed in -/- samples with no obvious neoplastic changes, marked reduction in RGN was observed in -/- samples with fully developed HCC. GST mu1 (GSTM1), on the other hand, showed a significant increase only in the neoplastic regions obtained from Sod1-/- livers. No change in GSTM1 was observed in the surrounding normal tissues. Marked reduction was observed in two intracellular lipid transporters, fatty acid binding protein 1 (FABP1) and major urinary protein 11 and 8 (MUP 11&8), in Sod1-/- samples. Analysis of additional samples at 18-22 months of age showed a three-fold increase in enolase activities in Sod1-/- livers. Consistent with previous findings, carbonic anhydrase 3 (CAIII) levels were significantly reduced in Sod1-/- samples, and immunohistochemical analysis revealed that the reduction was not homogenous throughout the lobular structure in the liver.
为了鉴定与铜锌超氧化物歧化酶(CuZnSOD,Sod1)缺陷小鼠肝细胞癌(HCC)发生相关的生物标志物,对18月龄Sod1 - / - 和 + / + 小鼠的肝脏样本进行了二维凝胶电泳(2-DE)及随后的质谱分析。细胞内钙结合蛋白调节钙素(RGN)在Sod1 - / - 样本中呈现出不同的变化。在没有明显肿瘤变化的 - / - 样本中观察到RGN水平升高,而在HCC完全发展的 - / - 样本中则观察到RGN显著降低。另一方面,谷胱甘肽S-转移酶mu1(GSTM1)仅在取自Sod1 - / - 肝脏的肿瘤区域显示出显著增加。在周围正常组织中未观察到GSTM1的变化。在Sod1 - / - 样本中,两种细胞内脂质转运蛋白脂肪酸结合蛋白1(FABP1)和主要尿蛋白11和8(MUP 11&8)显著降低。对18 - 22月龄的额外样本分析显示,Sod1 - / - 肝脏中烯醇化酶活性增加了三倍。与先前的研究结果一致,Sod1 - / - 样本中碳酸酐酶3(CAIII)水平显著降低,免疫组织化学分析表明这种降低在肝脏小叶结构中并非均匀分布。