The EGF 61A/G polymorphism - a predictive marker for recurrence of liver metastases from colorectal cancer.

Wiener klinische Wochenschrift
Florian M KovarGeorg Endler

Abstract

Epidermal growth factor (EGF) plays an important role in tumorigenesis. Variations in the DNA sequence of the gene EGF can lead to alterations in EGF activity, which is suspected to influence tumor progression. This retrospective study aimed to investigate the influence of EGF 61A/G polymorphism on the recurrence of liver metastases after hepatic surgery in patients with colorectal cancer. EGF 61A/G polymorphism was determined in 268 consecutive patients (175 [65%] men and 93 [35%] women, mean age 62 +/- 10.3 years) who had liver metastases at primary diagnosis and were treated by surgery with curative intent (R0) for liver metastases from colorectal cancer. Overall, 81 of 268 (30%) patients exhibited wild-type EGF 61 A/A, 137 (51%) were heterozygous EGF 61 A/G and 50 (19%) were homozygous EGF 61 G/G. After adjusting for age, sex, UICC stage and tumor location, we observed a trend-wise 1.6-fold increased risk for hepatic recurrence (HR 1.6; 95% CI 1.0-2.5, P = 0.06) in individuals with the G/G genotype compared with carriers of the A-allele. The effect was much more pronounced in younger patients (<or= 65 years), who showed a 2.0-fold increased risk of hepatic recurrence (HR 2.0; 95% CI 1.1-3.5, P = 0.021). No effect was observ...Continue Reading

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