PLCD1 is a functional tumor suppressor inducing G(2)/M arrest and frequently methylated in breast cancer
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摘要Chromosome 3p harbors multiple tumor-suppressor genes. PLCD1, located at 3p22, encodes an enzyme that mediates regulatory signaling of energy metabolism, calcium homeostasis and intracellular movement. We investigated the epigenetic alterations of PLCD1 and its tumor suppressor function in breast cancer. Frequent downregulation/silencing of PLCD1 was shown in most breast cancer cell lines by using semi-quantitative PCR. Promoter methylation of PLCD1 was detected in 78% (7/9) of cell lines and 52% (13/25) of primary tumors by Methylation-specific PCR (MSP), but not in any tumor adjacent breast tissues and normal breast tissues, which was further confirmed by bisulfite genomic sequencing (BGS). The silencing of PLCD1 could be reversed by pharmacological demethylation, indicating a methylation-mediated mechanism. Ectopic expression of PLCD1 in silenced breast cancer cells significantly inhibited their colony formation. In addition, PLCD1 inhibited tumor cell migration and induced cell cycle G(2)/M arrest. Thus, this study for the first time demonstrates the frequent inactivation of PLCD1 by promoter methylation and its tumor inhibitory function in breast cancer. Tumor-specific methylation of PLCD1 might serve as a biomarker for possible early detection and prognosis prediction of breast cancer.
著者Xiang TX, Li LL, Fan YC, Jiang YY, Ying Y, Putti TC, Tao QA, Ren GS
期刊名稱Cancer Biology and Therapy
詳細描述[Epub ahead of print].
出版年份2010
月份9
日期1
卷號10
期次5
出版社LANDES BIOSCIENCE
國際標準期刊號1538-4047
電子國際標準期刊號1555-8576
語言英式英語
關鍵詞breast cancer; methylation; PLCD1; tumor suppressor gene
Web of Science 學科類別Oncology; ONCOLOGY

上次更新時間 2020-25-10 於 01:18