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PNPLA3 I148M (rs738409) genetic variant is associated with hepatocellular carcinoma in obese individuals

Journal article
Authors Maria Antonella Burza
Carlo Pirazzi
Cristina Maglio
Kajsa Sjöholm
Rosellina Margherita Mancina
Per-Arne Svensson
Peter Jacobson
Martin Adiels
M. G. Baroni
Jan Borén
S. G. Corradini
T. Montalcini
Lars Sjöström
Lena M S Carlsson
Stefano Romeo
Published in Digestive and Liver Disease
Volume 44
Issue 12
Pages 1037-1041
ISSN 1590-8658
Publication year 2012
Published at Wallenberg Laboratory
Institute of Medicine, Department of Molecular and Clinical Medicine
Pages 1037-1041
Language en
Links dx.doi.org/10.1016/j.dld.2012.05.00...
Keywords Liver cancer, Obesity, Patatin-like phospholipase domain-containing 3, Swedish obese subjects study, fatty liver-disease, histological severity, bariatric surgery, risk, polymorphism, cirrhosis, susceptibility, adiponutrin, mortality, indexes
Subject categories Clinical Medicine

Abstract

Background: Obesity is a risk factor for cancer, including hepatocellular carcinoma. Patatin-like phospholipase domain-containing 3 (PNPLA3) I148M (rs738409) genetic variant has been associated with hepatocellular carcinoma (HCC) in individuals with chronic alcohol abuse or hepatic viral infection. In the present study we examined the association between the PNPLA3I148M genetic variant and hepatocellular carcinoma in obese individuals from the Swedish Obese Subjects cohort (n=4047). Methods: We performed a matched, prospective, controlled, interventional trial, investigating the effect of bariatric surgery (surgery group) compared to conventional treatment (control group) for obesity. Results: A total of 9 events were observed in the 15-year median follow up (5 in the control group and 4 in the surgery group). A significantly higher incidence of hepatocellular carcinoma in PNPLA3 148M allele carriers was found in obese individuals in the control group (log-rank P-value=0.001), but not in the surgery group (log-rank P-value=0.783). Consistently, an increased risk (for each PNPLA3 148M allele, hazard ratio: 5.9; 95% confidence interval 1.5-23.8; P-value=0.013) of developing hepatocellular carcinoma was observed only in the control group. Conclusion: The current study is the first prospective report showing the association of the PNPLA3I148M genetic variant and hepatocellular carcinoma in severely obese individuals.

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