Abstract:
:The ING1 gene is involved in the regulation of the cell cycle, senescence, and apoptosis and is a novel candidate tumor suppressor gene. ING2, another gene in the ING family, was identified and cloned. The functions of ING1 and ING2 largely depend on the activity of p53. To determine whether an alteration in these genes plays a role in carcinogenesis and tumor progression in lung cancer, we screened 30 human lung cancer cell lines and 31 primary lung cancer tumors for mutations in these genes using polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP) and direct sequencing. Our findings failed to uncover any mutations in these genes. We also examined the expression of ING1 and ING2 in lung cancer cell lines that either had or lacked a p53 mutation, and in a control bronchial epithelium cell line, using quantitative real-time reverse transcription-polymerase chain reaction (RT-PCR). ING1 expression was up-regulated in all 7 lung cancer cell lines that had a p53 mutation, while the expression of ING2 was down-regulated in 6 of 7 lung cancer cell lines that had a p53 mutation. These results suggest that the ING1 and ING2 genes have different roles in lung carcinogenesis and progression, and the ING2 gene may be an independent tumor suppressor candidate on p53.
journal_name
Oncol Repjournal_title
Oncology reportsauthors
Okano T,Gemma A,Hosoya Y,Hosomi Y,Nara M,Kokubo Y,Yoshimura A,Shibuya M,Nagashima M,Harris CC,Kudoh Skeywords:
subject
Has Abstractpub_date
2006-03-01 00:00:00pages
545-9issue
3eissn
1021-335Xissn
1791-2431journal_volume
15pub_type
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