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CDKN2 (MTS1) tumor suppressor gene mutations in human tumor cell lines
Q Liu1, S Neuhausen, M McClure
1Myriad Genetics, Inc., Salt Lake City, Utah 84108, USA.
Oncogene
|March 16, 1995
Summary
Mutations in the CDKN2 tumor suppressor gene were found in 18% of tested cancer cell lines, including melanoma and lung cancers. Ultraviolet light may cause these CDKN2 mutations in melanoma cells.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- The CDKN2 gene, also known as MTS1, CDK4I, and p16INK4, is a crucial tumor suppressor located at 9p21.
- Homozygous deletion of CDKN2 is frequent in various tumor cell lines.
Purpose of the Study:
- To investigate CDKN2 gene mutations in tumor cell lines lacking homozygous deletion.
- To determine the frequency and spectrum of CDKN2 mutations across different cancer types.
Main Methods:
- Sequencing of the CDKN2 gene in 154 tumor cell lines.
- Analysis of mutation types and their distribution in various cancer-derived cell lines.
Main Results:
- Mutations in CDKN2 were identified in 18% (27/154) of the examined cell lines.
- Mutations were observed in melanoma, bladder, lung, prostate cancer, and sarcoma cell lines.
- Melanoma cell line mutations suggest in vivo occurrence, potentially linked to ultraviolet radiation.
Conclusions:
- CDKN2 mutations are present in a significant subset of cancer cell lines, highlighting its role in tumorigenesis across diverse cancers.
- The findings suggest that ultraviolet light is a significant factor in CDKN2 mutagenesis in melanoma.
- The low frequency of loss of heterozygosity near CDKN2 implies that another tumor suppressor gene, if present, may be located in close proximity on chromosome 9p21.