中文摘要：

目的：探讨应用基因重叠延伸拼接PCR（SOE-PCR）技术构建Reg Ⅳ基因缺失CRD结构域表达载体,并转染Reg Ⅳ低表达结直肠癌细胞系。方法：应用SOE-PCR法获得Reg Ⅳ缺失CRD结构域片段,构建真核表达载体并转染Reg Ⅳ低表达结直肠癌LoVo细胞,G418筛选,RT-PCR检测鉴定。结果：经酶切鉴定筛选出的重组体测序结果与目的序列完全一致,重组载体构建成功,经pcDNA3.1-Reg Ⅳ-dom ain△转染的LoVo细胞Reg Ⅳ-dom ain△呈阳性表达。结论：利用SOE-PCR技术可成功构建Reg Ⅳ基因缺失CRD结构域的表达载体。

英文摘要：

Objective To construct the expression vector of Reg Ⅳ gene deleting the CRD domain and transfect it into human colon cancer LoVo cell line which is negative for Reg Ⅳ gene expression.Methods The fragment of Reg Ⅳ gene deleting the CRD domain was obtained by SOEPCR.Recombinant plasmids of Reg Ⅳ were constructed and tranfected into human colon cancer LoVo cell line.Selection for transfected cells was carried out in a medium containing G418 and identified by RT-PCR.Results The sequence of the recombinant vector digested by enzyme was completely consistent with the target sequence and the recombinant vector was successfully constructed.Conclusion The expression vector of Reg Ⅳ gene deleting the CRD domain can be successfully constructed by SOEPCR.