Analysis of the beta-catenin/T cell factor signaling pathway in 36 gastrointestinal and liver cancer cells.

Analysis of the beta-catenin/T cell factor signaling pathway in 36 gastrointestinal and liver cancer cells.
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DOI:
10.1111/j.1349-7006.2002.tb01226.x
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发表时间:
2002-11
期刊:
Japanese journal of cancer research : Gann
影响因子:
--
通讯作者:
Omata M
Omata M
中科院分区:
其他
文献类型:
--
作者:
Ikenoue T;Ijichi H;Kato N;Kanai F;Masaki T;Rengifo W;Okamoto M;Matsumura M;Kawabe T;Shiratori Y;Omata M

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我们研究了|一组36个人胃肠道和肝癌细胞系中的bT-连环蛋白/T细胞因子(Tcf)信号激活。报告基因分析和电泳迁移率变动分析显示,12/12(100%)结直肠癌细胞系、5/8(68%)胃癌细胞系、2/7(29%)肝癌细胞系中β-连环蛋白/Tcf信号传导上调,9个胰腺癌细胞系中无一上调。该通路的激活主要是由于腺瘤性结肠息肉病(APC)或β-连环蛋白的突变,Tcf-4在这些细胞系中高表达,信号转导上调。不仅在信号激活的细胞系中观察到核β-连环蛋白,而且在25例原发性胃癌中的14例(56%)、20例结肠癌中的15例(75%)、19例肝细胞癌中的5例(26%)和13例胰腺癌中的0例中也观察到核β-连环蛋白。具有完整APC和β-连环蛋白的信号转导上调的胃癌细胞系的存在表明除了APC或β-连环蛋白的突变之外还涉及其他机制。
We investigated the frequency and mechanism of |bT‐catenin/T cell factor (Tcf) signaling activation in a panel of 36 human gastrointestinal and liver cancer cell lines. Reporter assay and electrophoretic mobility shift assay revealed that the β‐catenin/Tcf signaling was upregulated in 12 of 12 (100%) colorectal, 5 of 8 (68%) gastric, 2 of 7 (29%) hepatic, and none of 9 pancreatic cancer cell lines. The activation of the pathway was mainly due to the mutation of adenomatous polyposis coli (APC) or β‐catenin, and Tcf‐4 was highly expressed in these cell lines with upregulated signaling. Nuclear β‐catenin was observed not only in the signaling‐activated cell lines, but also in 14 of 25 (56%) primary gastric cancers, 15 of 20 (75%) colon cancers, 5 of 19 (26%) hepatocellular carcinomas, and none of 13 pancreatic cancers. The presence of signaling‐upregulated gastric cancer cell lines with intact APC and β‐catenin suggests the involvement of other mechanisms than mutations of APC or β‐catenin.
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