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Liu L.,Nanjing Medical University | An J.,PLA Fourth Military Medical University | Liu J.,Nantong Tumor Hospital | Wen J.,Nanjing Medical University | And 13 more authors.
Molecular Carcinogenesis | Year: 2013

Genetic variations in miRNA processing genes may affect the biogenesis of miRNA, hence risk of HBV infection and hepatocellular carcinoma (HCC) development. In the present study, we hypothesized that potentially functional polymorphisms in 3′-untranslated region (UTR) of miRNA processing genes might contribute to susceptibility of HBV infection and HCC development. To test the hypothesis, we genotyped three selected SNPs (rs1057035 in DICER1, rs3803012 in RAN, and rs10773771 in PIWIL1) in a case-control study of 1300 HBV-positive HCC cancer cases, 1344 HBV persistent carriers, and 1344 HBV natural clearance subjects in Chinese. We observed that DICER1 rs1057035 CT/CC variant genotypes were associated with a significant decreased risk of HCC (adjusted OR=0.79, 95% CI=0.64-0.96) compared with wild-type TT and RAN rs3803012 AG/GG variant genotypes increased the risk of HBV persistent infection compared with AA genotype (adjusted OR=1.35, 95% CI=1.03-1.77). However, PIWIL1 rs10773771 CT/CC variant genotypes were associated with an approaching decreased risk of HCC (adjusted OR=0.86, 95% CI=0.73-1.01) and similar with RAN rs3803012 AG/GG (adjusted OR=0.80, 95% CI=0.61-1.06). Furthermore, reporter gene assays indicated that the three SNPs (rs1057035, rs3803012, and rs10773771) might change the binding ability of miRNAs to the 3′UTR of the three genes (DICER1, RAN, and PIWIL1), respectively. These findings indicated that DICER1 rs1057035, RAN rs3803012, and PIWIL1 rs10773771 might contribute to the risk of HBV-related HCC. © 2013 Wiley Periodicals, Inc.

Liu Y.,Nanjing Medical University | Zhang Y.,Nantong Tumor Hospital | Wen J.,Nanjing Medical University | Liu L.,Nantong Tumor Hospital | And 7 more authors.
PLoS ONE | Year: 2012

Background: MiR-106b-25 cluster, hosted in intron 13 of MCM7, may play integral roles in diverse processes including immune response and tumorigenesis. A single nucleotide polymorphism (SNP), rs999885, is located in the promoter region of MCM7. Methods: We performed a case-control study including 1300 HBV-positive hepatocellular carcinoma (HCC) cases, 1344 HBV persistent carriers and 1344 subjects with HBV natural clearance to test the association between rs999885 and the risk of HBV persistent infection and HCC. We also investigated the genotype-expression correlation between rs999885 and miR-106b-25 cluster in 25 pairs of HCC and adjacent non-tumor liver tissues. Results: Compared with the HBV natural clearance subjects carrying rs999885 AA genotype, those with AG/GG genotypes had a decreased risk of chronic HBV infection with an adjusted odds ratio (OR) of 0.79 [95% confidence intervals (CIs) = 0.67-0.93]. However, the AG/GG genotypes were significantly associated with an increased HCC risk in HBV persistent carriers (adjusted OR = 1.25, 95% CIs = 1.06-1.47). Expression analysis revealed that the expression level of miR-106b-25 cluster was significantly higher in AG/GG carriers than those in AA carriers in non-tumor liver tissues. Conclusions: These findings indicate that the A to G base change of rs999885 may provide a protective effect against chronic HBV infection but an increased risk for HCC in HBV persistent carriers by altering the expression of the miR-106b-25 cluster. © 2012 Liu et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Hu L.,Nanjing Medical University | Liu J.,Tumor Hospital of Nantong City | Chen X.,Tumor Hospital of Nantong City | Zhang Y.,Tumor Hospital of Nantong City | And 6 more authors.
Human Immunology | Year: 2010

Accumulated evidence suggested that cytotoxic T-lymphocyte antigen 4 (CTLA4) plays an important role in the negative regulation of T-cell proliferation and activation, and thus participates in antitumor immunity and cancer surveillance. Previously we reported that the CTLA4 49A/G (rs231775) single nucleotide polymorphism (SNP) was a candidate cancer susceptibility marker for breast, lung, esophageal, and gastric cancers. In the present study, we expanded our study to two infection-related cancers, namely, hepatocellular carcinoma (HCC) and cervical cancer. We genotyped rs231775 in two independent case-control studies of 864 HCC patients and 864 control subjects, and 719 cervical cancer patients and 719 control subjects. In the multivariate logistic regression models, CTLA4 +49 A/G variant genotype was associated with increased risk (AA vs GG) by 1.43-fold (95% CI = 0.94-2.17) for HCC, and 1.66-fold (95% CI = 1.13-2.44) for cervical cancer. Taken together, the results suggest that CTLA4 rs231775 may serve as a common cancer susceptibility marker. © 2010 American Society for Histocompatibility and Immunogenetics.

Liu Y.,Nanjing Medical University | Pan S.,Nanjing Medical University | Liu L.,Nantong Tumor Hospital | Liu L.,Nanjing Medical University | And 7 more authors.
PLoS ONE | Year: 2012

Background: Recently, several studies have demonstrated that two long non-coding RNAs (lncRNAs), HULC and MALAT1, may participate in hepatocellular carcinoma (HCC) development and progression. However, genetic variations in the two lncRNAs and their associations with HCC susceptibility have not been reported. In this study, we hypothesized that single nucleotide polymorphisms (SNPs) in HULC and MALAT1 may contribute to HCC risk. Methods: We conducted a case-control study and genotyped two SNPs, rs7763881 in HULC and rs619586 in MALAT1, in 1300 HBV positive HCC patients, 1344 HBV persistent carriers and 1344 subjects with HBV natural clearance to test the associations between the two SNPs and susceptibility to HCC and HBV chronic infection. Results: The variant genotypes of rs7763881 were significantly associated with decreased HCC risk in a dominant genetic model [AC/CC vs. AA: adjusted odds ration (OR) = 0.81, 95% confidence intervals (CIs) = 0.68-0.97, P = 0.022]. Furthermore, the variant genotypes of rs619586 was associated with decreased HCC risk with a borderline significance (AG/GG vs. AA: adjusted OR = 0.81, 95% CIs = 0.65-1.01, P = 0.057). However, no significant association was found between the two SNPs and HBV clearance. Conclusions: The variant genotypes of rs7763881 in HULC may contribute to decreased susceptibility to HCC in HBV persistent carriers. © 2012 Liu et al.

Xu Y.,Nanjing Medical University | Liu L.,Nanjing Medical University | Liu J.,Nantong Tumor Hospital | Zhang Y.,Nantong Tumor Hospital | And 7 more authors.
International Journal of Cancer | Year: 2011

The miR-34 family members are direct transcriptional targets of tumor suppressor p53, and loss of miR-34 function can impair p53-mediated cell cycle arrest and apoptosis. A potentially functional SNP rs4938723 (T > C) was found in the promoter region of pri-miR-34b/c (423 bp from the transcription start site), located in the CpG island and might affect transcription factor GATA binding and therefore pri-miR-34b/c expression. In our study, we hypothesized that SNPs miR-34b/c rs4938723 and TP53 Arg72Pro may independently or jointly contribute to primary hepatocellular carcinoma (HCC) susceptibility. We then genotyped the 2 SNPs in a case-control study of 501 patients with primary HCC and 548 cancer-free controls in a Chinese population. We observed that the variant genotypes of miR-34b/c rs4938723 were associated with significantly increased HCC risks compared with the wild-type TT genotype (adjusted OR = 1.37, 95% CI =1.06-1.78 for TC; OR = 1.53, 95% CI = 1.02-2.31 for CC and OR = 1.40, 95% CI = 1.10-1.80 for TC/CC). Furthermore, we found a significant interaction between alcohol drinking and SNP rs4938723 on HCC risk (p = 0.05 for multiplicative and p = 0.01 for additive interaction). However, we did not find any main effect of TP53 Arg72Pro on HCC risk in this population. These findings indicate that the potentially functional SNP rs4938723 in the promoter region of pri-miR-34b/c may contribute to the susceptibility of HCC in this Chinese population. Copyright © 2010 UICC.

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