CDKN2A/p16 is a cell cycle inhibitor which blocks abnormal cell growth and proliferation. The CDKN2A gene is frequently mutated or deleted in a wide variety of tumour types. Germline mutations have also been identified in familial atypical multiple mole melanoma (FAMMM) pedigrees. However, the role of CDKN2A in hereditary cancer is uncertain. To explore the relationship between CDKN2A germline mutations and risk of cancer, 75 families with cancers at multiple sites were analysed for germline mutations in the CDKN2A gene. A Met53Ile mutation was found in a non-FAMMM kindred with multiple cancers, including one case of melanoma. The Met53Ile mutation has been previously reported in three Australian FAMMM kindreds. A known Ala148Thr polymorphism was also detected in 5 individuals. No other families were found to have CDKN2A alterations. There were no reported CDKN2A mutations in families without cases of melanoma. Analysis of microsatellite markers adjacent to CDKN2A on chromosome 9p21 revealed that this family shares a common haplotype with one other family with this mutation, suggesting that Met53Ile is a founder mutation. These results suggest that while CDKN2A mutations are not restricted to FAMMM pedigrees, they are very rare or absent in families with individuals without melanoma.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.24375 |
| Date | January 1996 |
| Creators | Sun, Sophie. |
| Contributors | Rosenblatt, David S. (advisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science (Department of Biology.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001538770, proquestno: MM19852 |
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