Associations of genetic variants in the transcriptional coactivators EP300 and PCAF with hepatocellular carcinoma.

Abstract

BACKGROUND AND AIMS:

Hepatocellular carcinoma (HCC) is a common cause of death by cancer worldwide. In Morocco, HCC is characterized by few mutations and a mild chromosome instability suggesting that epigenetic changes may represent the driving force of tumorigenesis in the region. Recently, three studies looked for an association between EP300 or PCAF polymorphisms and cancer but there is a conspicuous lack of data regarding these histone acetyltransferase (HAT) variants and HCC development. The aim of the current study was to assess the impact of the Ile997Val in EP300 and Asn386Ser in PCAF polymorphisms on the risk of HCC.

MATERIALS AND METHODS:

We performed a case-control study comparing 94 cases with HCC and 220 matching controls. Sequencing methods were used to determine the genotype at the Ile997Val and Asn386Ser on EP300 and PCAF.

RESULTS:

We found an overall association between genotypes Val/Val in EP300 and HCC risk (OR, 3.03; 95% CI, 1.08-8.47; P=0.028). Population stratifications revealed a trend or significantly higher risks of HCC development for women and HCV-negative patients carrying the EP300 Val/Val genotype (OR, 4.06; 95% CI, 0.71-23.36; P=0.09 and OR, 4.48; 95% CI, 1.04-19.14; P=0.02, respectively). The PCAF Ser/Ser genotype at codon 386 was more frequent in HCC cases than in control group (P=0.03). We observed trends for higher risk of HCC among men and/or HCV-negative patients carrying Ser/Ser genotype when compared with controls (OR, 10.62; 95% CI, 0.50-225.13 and OR, 11.78; 95% CI, 0.47-295.56, respectively).

CONCLUSION:

It appears that variants of the transcriptional coactivator genes (EP300 and PCAF) may influence HCC risk in populations with low mutations or chromosomal instability rates. Additional surveys are warranted to confirm this first report.

• Authors: Abdellah Akil, Sayeh Ezzikouri, Abdellah Essaid El Feydi, Mustapha Benazzouz, Rajaa Afifi, Ama Gassama Diagne, Aziz Benjouad, Anne Dejean, Pascal Pineau, Soumaya Benjelloun
• Journal: Cancer epidemiology (Cancer Epidemiol) Vol. 36 Issue 5 Pg. e300-5 (Oct 2012) ISSN: 1877-783X [Electronic] Netherlands
• PMID: 22709982 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2012 Elsevier Ltd. All rights reserved.

Chemical References

• E1A-Associated p300 Protein
• EP300 protein, human
• p300-CBP Transcription Factors
• p300-CBP-associated factor

Topics

• Carcinoma, Hepatocellular (epidemiology, genetics)
• Case-Control Studies
• Chromosomal Instability (genetics)
• E1A-Associated p300 Protein (genetics)
• Female
• Gene Frequency
• Genetic Predisposition to Disease (genetics)
• Genotype
• Humans
• Liver Neoplasms (epidemiology, genetics)
• Male
• Markov Chains
• Middle Aged
• Morocco (epidemiology)
• Mutation, Missense
• Odds Ratio
• Polymorphism, Genetic
• Polymorphism, Single Nucleotide
• Risk Factors
• Sex Distribution
• Sex Factors
• p300-CBP Transcription Factors (genetics)