Previous observational studies suggested that hepatitis B virus (HBV) preS mutation plays an important role in the existence of HBV‐related hepatocellular carcinoma (HCC). However, the results are still debatable. With an increasing number of studies about this topic, this study employed a meta‐analysis to identify the association between HBV preS mutation and HCC risk. We searched for eligible studies from PubMed, ProQuest, CINAHL, ScienceDirect and Springer databases to assess the association between HBV mutation and HCC risk. This meta‐analysis was conducted using RevMan 5.3 to provide pooled estimate for odds ratio (ORs) with 95% confidence intervals (95% CIs). Twenty‐one clinical studies were included in this meta‐analysis study which consisted of 1738 participants with HBV‐related HCC and 3740 HBsAg‐positive patients without HCC. All studies used samples of Asian population. PreS deletion was the most common mutation found in all studies. We found that ORs of HBV overall preS deletion was associated with HCC (OR = 3.28; 95% CI = 2.32‐4.65; P < .00001; random‐effects model). Each preS1 and preS2 deletion was associated with increased risk of HCC, with OR 2.42 (95% CI = 1.25‐4.68, P = .008) and 3.36 (95% CI = 2.04‐5.55, P < .00001), respectively. PreS2 start codon mutation was also significantly associated with HCC risk (OR = 2.47; 95% CI: 1.15‐5.27; P = .02; random‐effect model). The result of this meta‐analysis suggested that HBV preS deletion (all, preS1 and preS2) and preS2 start codon mutation might contribute to the increased risk of HBV‐related HCC.
Background Research focusing on the relationship between five types of tumor necrosis factor-alpha (TNF-α) SNPs and the risk of hepatocellular carcinoma (HCC) were still controversial. Hereby, we performed a meta-analysis to determine the association between TNF-α promoter SNPs: -1031 T/C, − 863 C/A, − 857 C/T, − 308 G/A, and − 238 G/A with HCC risk. Methods We interrogated articles from journal database: PubMed, Pro-Quest, EBSCO, Science Direct, and Springer to determine the relationship between five types of SNPs in TNF-α gene with HCC risk. RevMan 5.3 software was used for analysis in fixed/random effect models. Results This meta-analysis included 23 potential articles from 2004 to 2018 with 3237 HCC cases and 4843 controls. We found that SNP − 863 C/A were associated with a significantly increased HCC risk (A vs C, OR = 1.31, 95% CI = 1.03–1.67). Similar results were obtained in − 857 C/T (TT/CT vs CC, OR = 1.31, 95% CI = 1.06–1.62), − 308 G/A (AA vs GG, OR = 3.14, 95% CI = 2.06–4.79), and − 238 G/A (AA vs GG, OR = 3.87, 95% CI = 1.32–11.34). While no associations were observed between SNP TNF-α − 1031 T/C and HCC risk. Conclusions The present meta-analysis showed that TNFα SNPs -863C/A, − 857 C/T, − 308 G/A, and − 238 G/A were associated with the risk of HCC.
Background: Research focusing on the relationship between five types of tumor necrosis factor-alpha (TNF-α) SNPs and the risk of hepatocellular carcinoma (HCC) were still controversial. Hereby, we performed a meta-analysis to determine the association between TNF-α promoter SNPs: -1031 T/C, -863 C/A, -857 C/T, -308 G/A, and -238 G/A with HCC risk. Methods: We interrogated articles from journal database: PubMed, Pro-Quest, EBSCO, Science Direct, and Springer to determine the relationship between five types of SNPs in TNF-α gene with HCC risk. RevMan 5.3 software was used for analysis in fixed/random effect models. Results: This meta-analysis included 23 potential articles from 2004-2018 with 3,237 HCC cases and 4,843 controls. We found that SNP -863 C/A were associated with a significantly increased HCC risk (A vs C, OR=1.31, 95% CI=1.03-1.67). Similar results were obtained in -857 C/T (TT/CT vs CC, OR=1.31, 95% CI=1.06-1.62), -308 G/A (AA vs GG, OR=3.14, 95% CI=2.06-4.79), and -238 G/A (AA vs GG, OR=3.87, 95% CI=1.32-11.34). While no associations were observed between SNP TNF-α -1031 T/C and HCC risk.Conclusions: The present meta-analysis showed that TNFα SNPs -863C/A, -857 C/T, -308 G/A, and -238 G/A were associated with the risk of HCC.
Background: Research focusing on the relationship between five types of tumor necrosis factor-alpha (TNF-α) SNPs and the risk of hepatocellular carcinoma (HCC) were still controversial. Hereby, we performed a meta-analysis to determine the association between TNF-α promoter SNPs: -1031 T/C, -863 C/A, -857 C/T, -308 G/A, and -238 G/A with HCC risk. Methods: We interrogated articles from journal database: PubMed, Pro-Quest, EBSCO, Science Direct, and Springer to determine the relationship between five types of SNPs in TNF-α gene with HCC risk. RevMan 5.3 software was used for analysis in fixed/random effect models. Results: This meta-analysis included 23 potential articles from 2004-2018 with 3,237 HCC cases and 4,843 controls. We found that SNP -863 C/A were associated with a significantly increased HCC risk (A vs C, OR=1.31, 95% CI=1.03-1.67; CA/AA vs CC, OR=1.19, 95% CI=1.03-1.36). Similar results were obtained in -857 C/T (TT/CT vs CC, OR=1.31, 95% CI=1.06-1.62), -308 G/A (G vs A, OR=1.98, 95% CI=1.62-2.42; AA/GA vs GG, OR=1.95, 95% CI=1.53-2.49; GG/GA vs AA, OR=2.52, 95% CI=1.69-3.76; AA vs GG, OR=3.14, 95% CI=2.06-4.79; and GA vs GG, OR=2.07, 95% CI=1.60-2.68), and -238 G/A (A vs G, OR=1.50, 95% CI=1.16-1.94; AA vs GG, OR=3.87, 95% CI=1.32-11.34; GA/GG vs AA, OR=2.67, 95% CI=1.17-6.10). While no associations were observed between SNP TNF-α -1031 T/C and HCC risk. Conclusions: The present meta-analysis showed that TNFα SNPs -863C/A, -857 C/T, -308 G/A, and -238 G/A were associated with the risk of HCC.
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