期刊
CANCER RESEARCH
卷 64, 期 6, 页码 2245-2250出版社
AMER ASSOC CANCER RESEARCH
DOI: 10.1158/0008-5472.CAN-03-2932
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资金
- NCI NIH HHS [P0 CA 29605, P01 CA029605-279003, P01 CA029605-270006, P01 CA012582-310018, P01 CA012582-319005, P0 CA 12528] Funding Source: Medline
Cutaneous melanoma is a highly aggressive tumor that is relatively resistant to chemotherapy and radiotherapy. This resistance may be in part due to inhibition of apoptosis. Apoptotic protease activating factor-1 (APAF-1), a candidate tumor suppressor gene, mediates p53-induced apoptosis, and its loss promotes oncogenic transformation. To determine whether loss of the APAF-1 locus influences tumor progression, we assessed loss of heterozygosity microsatellites on the APAF-1 locus (12q22-23) in 62 primary and 112 metastatic melanomas. We discovered that frequency of allelic imbalance was significantly higher in metastatic tumors (n = 36 of 98; 37%) than in primary melanomas (n = 10 of54; 19%; P = 0.02). In metastatic melanomas, APAF-1 loss significantly correlated with a worse prognosis (P < 0.05) in the patients, and its loss during melanoma tumor progression suggests that APAF-1 is a tumor suppressor gene. Furthermore, loss of heterozygosity was frequent in the 12q22-23 chromosome region centromeric to the APAF-1 locus suggesting that other tumor-related genes may be present in the 12q22-23 region. In summary, the study demonstrates that allelic imbalance in the 12q22-23 region is a genomic surrogate of poor disease outcome for cutaneous melanoma patients.
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