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  • Title: Germline mutations of the INK4a-ARF gene in patients with suspected genetic predisposition to melanoma.
    Author: Soufir N, Lacapere JJ, Bertrand G, Matichard E, Meziani R, Mirebeau D, Descamps V, Gérard B, Archimbaud A, Ollivaud L, Bouscarat F, Baccard M, Lanternier G, Saïag P, Lebbé C, Basset-Seguin N, Crickx B, Cave H, Grandchamp B.
    Journal: Br J Cancer; 2004 Jan 26; 90(2):503-9. PubMed ID: 14735200.
    Abstract:
    Germline anomalies of the INK4a-ARF and Cdk4 genes were sought in a series of 89 patients suspected of having a genetic predisposition to melanoma. Patients were selected based on the following criteria: (a) familial melanoma (23 cases), (b) multiple primary melanoma (MPM; 18 cases), (c) melanoma and additional unrelated cancers (13 cases), (d) age at diagnosis less than 25 years (21 cases), and (e) nonphoto-induced melanoma (NPIM; 14 cases). Mutations of INK4a-ARF and Cdk4 were characterised by automated sequencing, and germline deletions of INK4a-ARF were also examined by real-time quantitative PCR. Seven germline changes of INK4a-ARF, five of which were novel, were found in seven patients (8%). Four were very likely to be pathogenic mutations and were found in three high-risk melanoma families and in a patient who had a pancreatic carcinoma in addition to melanoma. Three variants of uncertain significance were detected in one MPM patient, one patient <25 years, and one NPIM patient. No germline deletion of INK4a-ARF was found in 71 patients, and no Cdk4 mutation was observed in the 89 patients. This study confirms that INK4a-ARF mutations are infrequent outside stringent familial criteria, and that germline INK4a-ARF deletions are rarely involved in genetic predisposition to melanoma.
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