Methylation of promoter and expression silencing of GPX3 gene in hepatocellular carcinoma tissue - 03/04/15
, Bing Yan b , Yantao Lu b , Gong Zhang a , Jie Li a , Wenlong Zhai a , Wenzhi Guo a , Shuijun Zhang a, b, ⁎ Bienvenue sur EM-consulte, la référence des professionnels de santé.
L’accès au texte intégral de cet article nécessite un abonnement.
| pages | 7 |
| Iconographies | 3 |
| Vidéos | 0 |
| Autres | 0 |
Summary |
Background/aims |
Accumulating evidence has identified transcriptional silencing by aberrant methylation of CpG islands as a potential mechanism for the inactivation of tumor suppressor genes. The role of aberrant methylation of the GPX3 promoter in hepatocellular carcinoma (HCC) is not yet clear. We investigated the association of the status of GPX3 promoter methylation and GPX3 protein expression with the clinicopathological progression of HCC.
Methodology |
Sixty HCC tumor and matched non-cancerous tissues were included in this study, and methylation was examined using MSP. GPX3 mRNA and protein levels were evaluated using RT-PCR and western blot analysis, respectively. Clinicopathological data were compiled for correlation analyses.
Results |
Among the 60 HCC cases, 76.7% (46/60) showed at elevated DNA methylation and displayed significantly lower levels of GPX3 mRNA and protein expression. Low or undetectable GPX3 protein expression was observed in 10 of 60 tumors. GPX3 promoter methylation was detected in 46 of 60 (76.7%) tumors, while no GPX3 gene promoter methylation was observed in the matched non-cancerous specimens. There was a negative correlation between promoter methylation and GPX3 mRNA levels (P<0.05). Analysis of clinicopathological data revealed that both mRNA and protein were significantly associated with portal tumor thrombosis, metastasis and differentiation. In additional, GPX3 methylation showed a relationship with portal tumor thrombosis, metastasis and differentiation.
Conclusions |
Our results suggest that promoter methylation may be a mechanism for inactivation of GPX3, possibly leading to subsequent carcinogenesis and progression of HCC.
Le texte complet de cet article est disponible en PDF.Plan
Vol 39 - N° 2
P. 198-204 - avril 2015 Retour au numéro
Article précédent
- Protective effects of ursolic acid in an experimental model of liver fibrosis through Nrf2/ARE pathway
- Jie-Qiong Ma, Jie Ding, Li Zhang, Chan-Min Liu
- The quality of hereditary haemochromatosis guidelines: A comparative analysis
- Annick Vanclooster, David Cassiman, Werner Van Steenbergen, Dorine W. Swinkels, Mirian C.H. Janssen, Joost P.H. Drenth, Bert Aertgeerts, Hub Wollersheim
Bienvenue sur EM-consulte, la référence des professionnels de santé.
L’accès au texte intégral de cet article nécessite un abonnement.
Bienvenue sur EM-consulte, la référence des professionnels de santé.
L’achat d’article à l’unité est indisponible à l’heure actuelle.
Déjà abonné à cette revue ?