Premium
Chromosome 13q12 region critical for the viability and growth of nasopharyngeal carcinoma hybrids
Author(s) -
Cheng Yue,
Lung Hong Lok,
Wong Po Shan,
Hao Da Cheng,
Man Chim Shek,
Stanbridge Eric John,
Lung Maria Li
Publication year - 2004
Publication title -
international journal of cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.475
H-Index - 234
eISSN - 1097-0215
pISSN - 0020-7136
DOI - 10.1002/ijc.11704
Subject(s) - nasopharyngeal carcinoma , biology , chromosome , genetics , hybrid , gene , phenotype , cancer research , tumor suppressor gene , microbiology and biotechnology , carcinogenesis , medicine , botany , radiation therapy
Allelic losses of chromosome 13 are often detected in nasopharyngeal carcinoma (NPC) and other cancers, implicating the presence of possible tumor suppressor genes (TSGs) on this chromosome. To identify candidate regions from larger and multiple lost areas observed from direct tumor studies, the technique of monochromosome transfer was utilized to provide functional evidence to verify and define these deletion findings. An intact chromosome 13 was transferred into the NPC HONE1 cell line. Resultant hybrids were used to map putative TSG activity. A critical region at 13q12 was non‐randomly eliminated in all surviving microcell hybrids around the marker D13S893; these hybrids were uniformly tumorigenic. Although a known TSG, BRCA2 , is mapped close to this critical region, no aberrant expression of this gene was detected in microcell hybrids and other NPC cell lines. These results suggest that at least one novel growth control gene on chromosome 13q12, which is not the BRCA2 gene, is essential for hybrid selection and may play a critical role in tumorigenicity. © 2004 Wiley‐Liss, Inc.