【摘要】 目的探讨大肠癌转移与ｐ５３基因突变的关系。方法用ＰＣＲ－ＳＳＣＰ检测７３例ＤｕｋｅｓＣ期大肠癌及４０例相应的淋巴结转移灶ｐ５３基因第５至第９外显子的突变。结果７３例原发灶有２７例（３７％），４０例淋巴结转移灶中有１９例（４７．５％）检测到ｐ５３基因突变，总突变率为４４％。在原发灶和转移灶同时检测的４０例中，有２１例（５２．５％）两者均未见ｐ５３突变；另１２例（３０％）两者均可见完全相同的突变条带；余下的７例（１７．５％）两者ＰＣＲ－ＳＳＣＰ的结果不一致。这７例经ＤＮＡ直接测序确定了ｐ５３基因突变位点。其中５例原发灶未见ｐ５３突变，而转移灶ｐ５３有明确突变；７例中２例转移灶可见ｐ５３有二个外显子突变，而原发灶仅一个或无突变点。结论多数ｐ５３基因突变发生在转移之前并持续存在于大肠癌进展至转移的整个时期，大肠癌的转移可伴有ｐ５３基因的新突变，或转移对ｐ５３基因突变有一定选择，提示ｐ５３基因突变可能与大肠癌转移相关。更多还原

【Abstract】 Objecitve\ To α1(Ⅰ),α1 (Ⅲ)and α1(Ⅳ)procollagen mRNA signals detected by in situ hybridization during the early stage of the experiment.All the three procollagen mRNAs were mostly localized in fibroblasts(Fbs)and MFs in the septa during the mid and late stages of fibrosis.Conclusions\ Fbs and MFs were considered as important ColⅠ,ColⅢand ColⅣproducing cells in liver fibrosis.Sinusoid endothelia were involved in ColⅣsynthesis in the fibrotic liver.更多还原