Details

Autor(en) / Beteiligte

• Anita Langerød
• Ida R. K. Bukholm
• André Bregård
• Per Eystein Lønning
• Tone Ikdal Andersen
• Torleiv O. Rognum
• Gunn Iren Meling
• Ragnhild A. Lothe
• Anne-Lise Børresen-Dale

Titel

The TP53 Codon 72 Polymorphism May Affect the Function of TP53 Mutations in Breast Carcinomas but not in Colorectal Carcinomas

Ist Teil von

• Cancer epidemiology, biomarkers & prevention, 2002-12, Vol.11 (12), p.1684-1688

Ort / Verlag

Philadelphia, PA: American Association for Cancer Research

Erscheinungsjahr

2002

Quelle

MEDLINE

Beschreibungen/Notizen

• An Arg/Pro polymorphism in codon 72 of the TP53 gene was analyzed in blood samples from 390 breast and 162 colorectal cancer patients previously investigated for TP53 mutations in their tumors. Among the breast cancer cases, 228 were homozygous for the Arg72 allele, of which, 65 (28.5%) also had a TP53 mutation in their tumors. In contrast, of 26 cases that were homozygous for the Pro72 allele, only 1 case (3.8%) had a TP53 mutation in the tumor ( P = 0.004). Cloning the TP53 gene from tumor DNA followed by sequencing was performed in 14 heterozygotes with tumor mutation, and 9 of the mutations resided on the Arg72 allele. Among the colorectal cancer cases, no difference in mutation frequency was seen between the two different homozygotes, 40 TP53 mutations in 97 Arg72 homozygous cases (41.2%) versus 7 in 16 Pro72 homozygous cases (43.8%). These results suggest a selective growth advantage for cells carrying a type of TP53 mutation seen in breast carcinomas when the mutation resides on an Arg72 allele.