Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/33140
標題: p53 Dysfunction by Xeroderma Pigmentosum Group C Defects Enhance Lung Adenocarcinoma Metastasis via Increased Mmp1 Expression
作者: Wu, Y.H.
廖俊旺
Wu, T.C.
Liao, J.W.
Yeh, K.T.
Chen, C.Y.
Lee, H.
關鍵字: nucleotide excision-repair
matrix metalloproteinase-1
dna-repair
mutant p53
tissue inhibitors
prognostic-factor
cancer patients
poor-prognosis
activation
protein
期刊/報告no:: Cancer Research, Volume 70, Issue 24, Page(s) 10422-10432.
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. Cancer Res; 70(24); 10422-32. (C)2010 AACR.
URI: http://hdl.handle.net/11455/33140
ISSN: 0008-5472
文章連結: http://dx.doi.org/10.1158/0008-5472.can-10-2615
Appears in Collections:獸醫病理生物學所

文件中的檔案:

取得全文請前往華藝線上圖書館



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.