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CDKN2A novel mutation in a patient from a melanoma-prone family
P Grammatico1, F Binni, L Eibenschutz
1Medical Genetics, University of Rome 'La Sapienza', c/o Osp. L. Spallanzani, V. Portuense n. 292, 00149 Rome, Italy. paola.grammatico@uniroma1.it
Abstract:
CDKN2A is thought to be the main candidate gene for melanoma susceptibility. Deletion or mutations in the CDKN2A gene may produce an imbalance between functional p16 and cyclin D, causing abnormal cell growth. We here describe a novel mutation consisting of a 1 bp deletion at nucleotide position 201 (codon 67) (CACGGcGCG) resulting in a truncated protein (stop codon 145). The patient, a female subject from a melanoma-prone family, presented at the age of 47 years with a superficial spreading melanoma of the trunk. Her father had colon cancer at the age of 43 years and melanoma at 63 years, her uncle suffered from gastric cancer, and her grandfather had laryngeal cancer.
Insights
A novel CDKN2A gene mutation was identified in a melanoma-prone family, leading to a truncated protein and abnormal cell growth. This finding contributes to understanding melanoma susceptibility and genetic risk factors.
Area of Science:
- Genetics
- Oncology
Background:
- The CDKN2A gene is a primary candidate for melanoma susceptibility.
- Mutations in CDKN2A can disrupt the balance of p16 and cyclin D, promoting aberrant cell proliferation.
Observation:
- A 1 bp deletion at nucleotide position 201 (codon 67) was identified in the CDKN2A gene.
- This mutation resulted in a premature stop codon at position 145, producing a truncated protein.
Findings:
- The identified mutation was found in a female patient with superficial spreading melanoma.
- The patient's family history includes melanoma and other cancers, suggesting a hereditary component.
Implications:
- This novel mutation provides further insight into the genetic underpinnings of melanoma.
- Understanding such mutations is crucial for identifying individuals at high risk for melanoma and other cancers.