Peroxisome proliferator-activated receptor gamma induces growth arrest and differentiation markers of human colon cancer cells.

Peroxisome proliferator-activated receptor gamma induces growth arrest and differentiation markers of human colon cancer cells.
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DOI:
10.1111/j.1349-7006.1999.tb00668.x
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发表时间:
1999-01
期刊:
Japanese journal of cancer research : Gann
影响因子:
--
通讯作者:
Matsuzawa Y
Matsuzawa Y
中科院分区:
其他
文献类型:
--
作者:
Kitamura S;Miyazaki Y;Shinomura Y;Kondo S;Kanayama S;Matsuzawa Y

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过氧化物酶体增殖物激活受体γ (PPARγ)是脂肪组织中表达的核受体之一,在脂肪细胞分化中起重要作用。在这项研究中,我们研究了PPARγ在6种结肠癌细胞系HT‐29、CaCo‐2、SW‐480、DLD‐1、LoVo和T‐84中的表达及其在细胞生长和分化中的作用。所有六种均表达PPARγ mRNA和蛋白,分别在northern和western blot分析中显示。在强烈表达PPARγ的HT‐29细胞中进行的荧光素酶测定显示,PPARγ的选择性配体曲格列酮他们研究了过氧化物酶体增殖反应元件(PPRE)驱动的启动子的转录。此外,曲格列酮可显著减少[3H]胸腺嘧啶掺入,并通过流式细胞术检测G1细胞周期阻滞。最后,曲格列酮诱导肠细胞分化标志物绒毛蛋白和肠碱性磷酸酶mrna的表达。综上所述,人结肠癌细胞表达PPARγ,其配体抑制细胞生长并诱导分化标志物。
Peroxisome proliferator‐activated receptor γ (PPARγ), one of the nuclear receptors expressed in adipose tissue, plays an important role in adipocyte differentiation. In this study, we investigated the expression of PPARγ and its role in cellular growth and differentiation in six colon cancer cell lines: HT‐29, CaCo‐2, SW‐480, DLD‐1, LoVo, and T‐84. All six expressed PPARγ mRNA and protein, shown respectively on northern and western blot analyses. Luciferase assay in HT‐29 cells, which strongly express PPARγ showed that troglitazone, a selective ligand for PPAR?, transacti‐vated the transcription of a peroxisome proliferator response element (PPRE)‐driven promoter. Furthermore, troglitazone caused a marked decrease in [3H] thymidine incorporation and G1 cell‐cycle arrest determined by flow cytometry. Finally, troglitazone induced expression of mRNAs for villin and intestinal alkaline phosphatase, markers for enterocyte differentiation. In conclusion, human colon cancer cells express PPARγ, the ligands of which inhibit cell growth and induce differentiation markers.
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