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Int. J. Mol. Sci. 2016, 17(5), 630; doi:10.3390/ijms17050630

PNPLA3 Expression Is Related to Liver Steatosis in Morbidly Obese Women with Non-Alcoholic Fatty Liver Disease

1
Group de Recerca GEMMAIR (AGAUR)-Medicina Aplicada, Institut Investigació Sanitària Pere Virgili (IISPV), Departament de Medicina i Cirurgia, Universitat Rovira i Virgili (URV), 43007 Tarragona, Spain
2
Servei Medicina Interna, Hospital Universitari Joan XXIII Tarragona, Mallafré Guasch, 4, 43007 Tarragona, Spain
3
Servei Anatomia Patològica, Hospital Universitari Joan XXIII Tarragona, Mallafré Guasch, 4, 43007 Tarragona, Spain
4
Servei de Cirurgia, Hospital Sant Joan de Reus, Departament de Medicina i Cirurgia, Universitat Rovira i Virgili (URV), IISPV, Avinguda Doctor Josep Laporte, 2, 43204 Tarragona, Spain
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editors: Giovanni Targher and Amedeo Lonardo
Received: 24 February 2016 / Revised: 19 April 2016 / Accepted: 22 April 2016 / Published: 27 April 2016
(This article belongs to the Special Issue Non-Alcoholic Fatty Liver Disease Research 2016)
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Abstract

Recent reports suggest a role for the Patatin-like phospholipase domain-containing protein 3 (PNPLA3) in the pathology of non-alcoholic fatty liver disease (NAFLD). Lipid deposition in the liver seems to be a critical process in the pathogenesis of NAFLD. The aim of the present work was to evaluate the association between the liver PNPLA3 expression, key genes of lipid metabolism, and the presence of NAFLD in morbidly obese women. We used real-time polymerase chain reaction (PCR) analysis to analyze the hepatic expression of PNPLA3 and lipid metabolism-related genes in 55 morbidly obese subjects with normal liver histology (NL, n = 18), simple steatosis (SS, n = 20), and non-alcoholic steatohepatitis (NASH, n = 17). Liver biopsies were collected during bariatric surgery. We observed that liver PNPLA3 expression was increased in NAFLD than in NL. It was also upregulated in SS than in NL. Interestingly, we found that the expression of PNPLA3 was significantly higher in severe than mild SS group. In addition, the expression of the transcription factors LXRα, PPARα, and SREBP2 was positively correlated with PNPLA3 liver expression. Regarding rs738409 polymorphism, GG genotype was positive correlated with the presence of NASH. In conclusion, our results show that PNPLA3 could be related to lipid accumulation in liver, mainly in the development and progression of simple steatosis. View Full-Text
Keywords: PNPLA3; morbid obesity; non-alcoholic fatty liver disease; simple steatosis; fatty acid metabolism; non-alcoholic steatohepatitis PNPLA3; morbid obesity; non-alcoholic fatty liver disease; simple steatosis; fatty acid metabolism; non-alcoholic steatohepatitis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Aragonès, G.; Auguet, T.; Armengol, S.; Berlanga, A.; Guiu-Jurado, E.; Aguilar, C.; Martínez, S.; Sabench, F.; Porras, J.A.; Ruiz, M.D.; Hernández, M.; Sirvent, J.J.; Del Castillo, D.; Richart, C. PNPLA3 Expression Is Related to Liver Steatosis in Morbidly Obese Women with Non-Alcoholic Fatty Liver Disease. Int. J. Mol. Sci. 2016, 17, 630.

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