p53 dysfunction by xeroderma pigmentosum group C defects enhance lung adenocarcinoma metastasis via increased Mmp1 expression

Yi Hui Wu, Tzu Chin Wu, Jiunn Wang Liao, Kun Tu Yeh, Chih Yi Chen, Huei Lee

研究成果: 雜誌貢獻文章同行評審

24 引文 斯高帕斯(Scopus)

摘要

Xeroderma pigmentosum group C (XPC) interacts with hHR23B to recognize DNA damage in global genomic repair. We previously showed that XPC is predominantly affected by its hypermethylation and is associated with an increased occurrence of p53 mutation in lung cancer. Tumors with low XPC mRNA levels had a poorer prognosis than those with high XPC mRNA levels, suggesting that XPC defects may enhance tumor metastasis. However, the underlying mechanism is unclear. Here, we show that p53 transcriptional activity is modulated by XPC, whereby XPC stabilizes hHR23B to form an hHR23B-p53 complex that prevents p53 degradation. In addition, in lung cancer cells and xenograft tumors in nude mice, overexpression of XPC suppresses cell/tumor metastatic ability via repression of matrix metalloproteinase-1 (MMP1) transcription by p53. Among tumors from lung cancer patients, those with low XPC mRNA also tended to have low expression of MMP1 mRNA compared with those with high XPC mRNA. Patients with low XPC mRNA levels also more commonly had tumors with late-stage, distant metastasis (M1), nodal metastasis, and T value (P <0.001 for tumor stage, distant metastasis, and nodal metastasis; P = 0.006 for t value). In conclusion, p53 dysfunction caused by XPC defects in lung cancers may enhance tumor metastasis via increased MMP1 expression.
原文英語
頁(從 - 到)10422-10432
頁數11
期刊Cancer Research
70
發行號24
DOIs
出版狀態已發佈 - 十二月 15 2010
對外發佈Yes

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

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