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Exocyclic DNA adducts derived from lipid peroxidation as oxidative stress markers in human colon carcinogenesis

机译:衍生自脂质过氧化作为人结肠癌中的氧化应激标记物的官方DNA加合物

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Although in the pathways to colorectal cancer multiple genetic changes via inherited and/or acquired mutations and disregulated DNA methylation in cancer-relevant genes1 have been defined, the total number of genetic alterations, i.e. the extent of genomic instability in sporadic colorectal cancer progression, has been unknown. Recently Stoler et al? analysed colorectal premalignant polyps and carcinoma samples by inter (simple sequence repeat)-PCR. The mean number of genomic alterations in carcinoma and premalignant colonic polyps were found to be approximately 11 000 per cell, suggesting a similar number of events to occur early in tumour progression. These results indicated that genomic destabilization is an early step in sporadic tumour development, and genomic instability is a cause rather than an effect of malignancy, facilitating vastly accelerated somatic cell evolution and colon cancer progressions.
机译:虽然在结直肠癌的途径中通过遗传和/或获得的突变进行多种遗传变化,但已经定义了癌症相关基因中的DNA甲基化,遗传改变的总数,即散发性结肠直肠癌进展的基因组不稳定性的程度不知道。最近Stoler等人?通过INT(简单序列重复)-PCR分析结肠直肠毛细血症息肉和癌样品。发现癌和急性结肠息肉中的基因组改变的平均数量为每种细胞约为11 000个,表明在肿瘤进展中早期发生类似的事件。这些结果表明,基因组稳定化是散发性肿瘤发育的早期步骤,基因组不稳定性是一种原因而不是恶性肿瘤的效果,促进了大量加速的体细胞演化和结肠癌进展。

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