Genomic structure and alterations of homeobox gene CDX2 in colorectal carcinomas.

Genomic structure and alterations of homeobox gene CDX2 in colorectal carcinomas.
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DOI:
10.1038/sj.bjc.6690068
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发表时间:
1999-02
影响因子:
8.8
通讯作者:
--
中科院分区:
医学1区
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CDX2(一种尾部相关同源盒基因)的表达在结直肠癌中被发现降低。 Cdx2 杂合无效突变小鼠产生多发性肠腺瘤性息肉。为了阐明 CDX2 在结直肠癌发生中的作用,我们确定了其基因组结构,并在 49 例散发性结直肠癌和 10 例无微卫星不稳定的遗传性非息肉性结直肠癌 (HNPCC) 中寻找 CDX2 突变。他们都没有表现出突变。我们进一步检查了 19 个具有微卫星不稳定性的 HNPCC 癌,以检测 CDX2 内 (G)7 重复位点的突变。其中 1 个 (5.3%) 表现出 1 个 G 插入。在 20 种信息性散发性癌中的 2 种(10%)和三种信息性 HNPCC 癌症中的一种(33.3%)中观察到杂合性丢失。这些数据表明 CDX2 在结直肠癌发生中可能仅发挥次要作用。 © 1999 癌症研究运动
Expression of CDX2, a caudal-related homeobox gene, was found to be decreased in colorectal carcinomas. Heterozygous null mutant mice as to Cdx2 develop multiple intestinal adenomatous polyps. To clarify the role of CDX2 in colorectal carcinogenesis, we determined its genomic structure, and searched for mutations of CDX2 in 49 sporadic colorectal carcinomas and ten hereditary non-polyposis colorectal cancers (HNPCC) without microsatellite instability. None of them exhibited a mutation. We further examined 19 HNPCC carcinomas with microsatellite instability for mutations in a (G)7 repeat site within CDX2. One of them (5.3%) exhibited one G insertion. Loss of heterozygosity was observed in 2 of the 20 (10%) informative sporadic carcinomas, and in one of the three (33.3%) informative HNPCC cancers. These data indicate that CDX2 may play only a minor role in colorectal carcinogenesis. © 1999 Cancer Research Campaign
DOI: 10.1038/ng1294-405
发表时间: 1994-12-01
期刊: NATURE GENETICS
影响因子: 30.8
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通讯作者: AALTONEN, LA
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