Matrix Metalloproteinase-2 Polymorphisms and Incident Coronary Artery Disease: A Meta-Analysis

LOC643714 Polymorphisms Contribute to an Elevated Susceptibility to Breast Cancer: A Meta-analysis of 231,191 Subjects

BACKGROUND

Several recent genome-wide association studies tried to explore associations between LOC643714 polymorphisms and breast cancer (BC). However, the results of these studies were inconsistent. The purpose of this meta-analysis was to better analyze the effects of LOC643714 polymorphisms on individual susceptibility to BC in a larger pooled population.

MATERIALS AND METHODS

PubMed, Web of Science, and Embase were searched for eligible studies. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated to estimate the strength of associations.

RESULTS

In total, 42 studies with 231,191 subjects were analyzed. Significant associations with BC were observed for rs3803662 (dominant comparison: OR, 0.89; 95% CI, 0.84-0.95; P = .0008; recessive comparison: OR, 1.17; 95% CI, 1.07-1.28; P = .0004; over-dominant comparison: OR, 1.07; 95% CI, 1.02-1.11; P = .002; allele comparison: OR, 0.90; 95% CI, 0.86-0.95; P = .0002), rs8051542 (dominant comparison: OR, 0.87; 95% CI, 0.83-0.91; P < .0001; recessive comparison: OR, 1.19; 95% CI, 1.11-1.28; P < .0001; over-dominant comparison: OR, 1.07; 95% CI, 1.02-1.11; P = .004; allele comparison: OR, 0.89; 95% CI, 0.86-0.91; P < .0001), and rs12922061 (dominant comparison: OR, 0.83; 95% CI, 0.73-0.93; P = .002; over-dominant comparison: OR, 1.43; 95% CI, 1.27-1.61; P < .0001) polymorphisms in the overall population. Further subgroup analyses yielded similar positive results for rs3803662 and rs8051542 polymorphisms in Asians, Caucasians, and Africans, for rs12443621 polymorphism in Caucasians, and for rs12922061 polymorphism in Asians.

CONCLUSIONS

Our findings suggested that LOC643714 rs3803662, rs8051542, rs12443621, and rs12922061 polymorphisms were all significantly associated with BC in certain populations.

The rs498872 polymorphism is associated with an elevated susceptibility to glioma: a meta-analysis of 36,264 subjects

Several genome-wide association studies have already explored the associations between rs498872 polymorphism and glioma, but the results of these studies were not consistent. Consequently, we conducted a meta-analysis of relevant studies to better analyze the effects of rs498872 polymorphism on individual susceptibility to glioma. PubMed, Web of Science and Embase were searched for eligible studies. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated. Totally, 12 studies with 36,264 subjects were analyzed. A significant association with glioma was observed for the rs498872 polymorphism in CC versus CT + TT (dominant comparison, p < 0.0001, OR = 0.81, 95% CI 0.76-0.85), TT versus CC + CT (recessive comparison, p < 0.0001, OR = 1.23, 95% CI 1.13-1.34), CT versus CC + TT (overdominant comparison, p < 0.0001, OR = 1.15, 95% CI 1.09-1.21) and C versus T (allele comparison, p < 0.0001, OR = 0.86, 95% CI 0.84-0.90). Further subgroup analyses yielded similar positive results in both Asians and Caucasians. Our findings suggested that the rs498872 polymorphism may serve as a potential genetic biomarker of glioma in both Asians and Caucasians.

Associations of intercellular adhesion molecule‐1 rs5498 polymorphism with ischemic stroke: A meta‐analysis

Background

Recently, associations between intercellular adhesion molecule‐1 (ICAM‐1) rs5498 polymorphism and ischemic stroke (IS) were investigated by several pilot studies, but with inconsistent results. In this study, a meta‐analysis was performed to better assess the relationship between ICAM‐1rs5498 polymorphism and IS.

Methods

PubMed, Medline, Embase, and CNKI were searched for eligible studies. We calculated odds ratios (ORs) and 95% confidence intervals (CIs) to evaluate associations between ICAM‐1 rs5498 polymorphism and IS.

Results

Totally 16 studies with 2,596 cases and 11,800 controls were analyzed. A significant association with IS was observed for rs5498 polymorphism in GG versus AA + AG (recessive model, p = 0.009, OR = 1.62, 95% CI 1.13–2.32, I² = 76%) in overall population. Further subgroup analyses showed that rs5498 polymorphism was significantly associated with IS in Caucasians in AA versus AG + GG (dominant model, p = 0.03, OR = 0.52, 95% CI 0.29–0.95, I² = 72%), GG versus AA + AG (recessive model, p < 0.0001, OR = 2.98, 95% CI 2.05–4.31, I² = 19%), and A versus G (allele model, p = 0.005, OR = 0.50, 95% CI 0.31–0.81, I² = 81%). However, no any positive findings were detected for Asians.

Conclusions

Our findings indicated that rs5498 polymorphism was significantly associated with individual susceptibility to IS in Caucasians, but not in Asians.

Associations between cytotoxic T-lymphocyte-associated antigen 4 gene polymorphisms and diabetes mellitus: a meta-analysis of 76 case-control studies

Background: Several genetic association studies already investigated potential roles of cytotoxic T-lymphocyte-associated antigen 4 (CTLA-4) gene polymorphisms in diabetes mellitus (DM), with inconsistent results. Therefore, we performed this meta-analysis to better assess the relationship between CTLA-4 gene polymorphisms and DM in a larger pooled population.

Methods: PubMed, Embase, Web of Science, and CNKI were systematically searched for eligible studies. Pooled odds ratios (ORs) with 95% confidence intervals (CIs) were calculated to estimate the strength of associations between CTLA-4 gene polymorphisms and DM in all possible genetic models.

Results: A total of 76 studies were finally included in our analyses. Significant associations with susceptibility to type 1 diabetes mellitus (T1DM) were detected for rs231775 (dominant model: P=0.008, OR = 0.83, 95%CI 0.73–0.95; recessive model: P=0.003, OR = 1.27, 95%CI 1.09–1.50; allele model: P=0.004, OR = 0.85, 95%CI 0.77–0.95) and rs5742909 (recessive model: P=0.02, OR = 1.50, 95%CI 1.05–2.13) polymorphisms in overall population. Further subgroup analyses revealed that rs231775 polymorphism was significantly associated with susceptibility to T1DM in Caucasians and South Asians, and rs5742909 polymorphism was significantly associated with susceptibility to T1DM in South Asians. Moreover, rs231775 polymorphism was also found to be significantly associated with susceptibility to type 2 diabetes mellitus (T2DM) in East Asians and South Asians.

Conclusions: Our findings indicated that rs231775 and rs5742909 polymorphisms may serve as genetic biomarkers of T1DM, and rs231775 polymorphism may also serve as a genetic biomarker of T2DM.

Associations between FCGR polymorphisms and immune thrombocytopenia: A meta-analysis

Several studies already explored associations between Fc gamma receptor (FCGR) polymorphisms and immune thrombocytopenia (ITP), but the results of these studies were not consistent. Consequently, we conducted a meta-analysis of relevant studies to better analyse the effects of FCGR polymorphisms on individual susceptibility to ITP. PubMed, Web of Science, Embase and CNKI were searched for eligible studies. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated. Totally 17 studies were eligible for analyses (1200 cases and 1723 controls). Significant associations with ITP were observed for FCGR3A F158V polymorphism in dominant (P < 0.0001, OR = 0.47, 95% CI 0.39-0.57), recessive (P < 0.0001, OR = 2.03, 95% CI 1.58-2.61), overdominant (P < 0.0001, OR = 1.42, 95% CI 1.19-1.69) and allele (P < 0.0001, OR = 0.58, 95% CI 0.51-0.65) models in overall analyses. But we did not observe any significant associations with ITP for FCGR2A H131R and FCGR2B I232T polymorphisms in overall analyses. Subgroup analyses by ethnicity yielded similar positive results for FCGR3A F158V polymorphism in both Asians and Caucasians. Furthermore, subgroup analyses by type of disease revealed that FCGR2A H131R polymorphism was significantly associated with childhood-onset ITP, and FCGR3A F158V polymorphism was significantly associated with both childhood-onset and adult-onset ITP. In summary, our findings suggested that FCGR2A H131R polymorphism may serve as a potential genetic biomarker of childhood-onset ITP, while FCGR3A F158V polymorphism may serve as a potential genetic biomarker of both childhood-onset and adult-onset ITP.

The 6q25.1 rs2046210 polymorphism is associated with an elevated susceptibility to breast cancer: A meta-analysis of 261,703 subjects

BACKGROUND

Several genome-wide association studies already explored the associations between 6q25.1 rs2046210 polymorphism and breast cancer (BC), but the results of these studies were not consistent. Thus, we conducted a meta-analysis of relevant studies to better analyze the effects of rs2046210 polymorphism on individual susceptibility to BC.

METHODS

PubMed, Web of Science, and Embase were searched for eligible studies. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated.

RESULTS

Totally 21 studies with 261,703 subjects were analyzed. A significant association with BC was observed for the rs2046210 polymorphism in GG versus GA +AA (dominant comparison, p < 0.0001, OR = 0.78, 95% CI 0.73-0.83), AA versus GG + GA (recessive comparison, p < 0.0001, OR = 1.21, 95% CI 1.18-1.24), GA versus GG + AA (overdominant comparison, p < 0.0001, OR = 1.12, 95% CI 1.08-1.16), and G versus A (allele comparison, p < 0.0001, OR = 0.86, 95% CI 0.82-0.89). Further subgroup analyses yielded similar positive results in both Asians and Caucasians.

CONCLUSION

In summary, our findings suggested that the rs2046210 polymorphism may serve as a potential genetic biomarker of BC in both Asians and Caucasians.

TLR4 and MMP2 polymorphisms and their associations with cardiovascular risk factors in susceptibility to aortic aneurysmal diseases

Background: Toll-like receptor 4 (TLR4) and matrix metalloproteinase 2 (MMP2) play important roles in aortic pathophysiology. We aimed to evaluate the contribution of TLR4 and MMP2 polymorphisms individually and complex interactions between gene and risk factors in susceptibility to aortic aneurysm (AA) and its subtypes. Methods: KASP method was adopted to detect TLR4rs11536889, rs1927914 and MMP2rs2285053 polymorphisms in 498 controls and 472 AA patients, including 212 abdominal AA (AAA) and 216 thoracic AA (TAA). Results: In the overall analysis, MMP2rs2285053 TC genotype was correlated with TAA risk (P = 0.047, OR = 1.487). Stratified analysis revealed an increased AA risk in males with TLR4rs1927914 TC genotype, while MMP2rs2285053 TC conferred an elevated AA risk in the subjects ≤60 years, and its TC genotype and dominant model were associated with TAA in the subjects ≤60 year. The interaction between TLR4rs1927914 and MMP2rs2285053 was associated with AAA risk (P _interaction = 0.028, OR = 2.913). Furthermore, significant interaction between TLR4rs11536889 and dyslipidemia was observed for TAA risk, while TLR4rs1927914 could interact with hypertension and diabetes to increase the risk of AA or its subtypes. Two-way interaction effect of TLR4rs1927914 and MMP2rs2285053 was enhanced by diabetes or dyslipidemia. Conclusion: TLR4 and MMP2 polymorphisms and their complex interactions with cardiovascular risk factors contributed to aortic aneurysmal diseases.

The association of polymorphisms in promoter region of MMP2 and MMP9 with recurrent spontaneous abortion risk in Chinese population

This study aimed to reveal the genetic association between polymorphisms in promoter region of matrix metalloproteinase 2 (MMP2) and matrix metalloproteinase 9 (MMP9) and the risk of recurrent spontaneous abortion (RSA) in Chinese population.A total of 129 RSA patients and 116 relative controls were selected and the genotyping of polymorphism was conducted by polymerase chain reaction with sequencing. Genotype distribution of polymorphism in the control group was tested the status of Hardy-Weinberg equilibrium and then, genotype frequencies were compared between the case and control groups by chi-squared test. Odds ratio (OR) with the corresponding 95% confidence interval (95% CI) was computed to express the risk of RSA caused by polymorphism. Moreover, the linkage disequilibrium of polymorphisms in MMP2 was analyzed by Haploview software.CT genotype and T allele of rs243865 in MMP2 were significantly associated with the increased susceptibility to RSA in Chinese population (CT vs. CC: OR = 1.926, 95% CI = 1.101-3.368; T vs. C: OR = 1.751, 95% CI = 1.146-2.676). Similarly, CT genotype carriers of rs3918242 in MMP9 were obviously more in RSA patients than that of the controls (P = .037), which indicated it was associated with the risk of RSA occurrence (OR = 1.760, 95% CI = 1.034-2.995). So was T allele in RSA development (OR = 1.595, 95% CI = 1.061-2.398). Haplotypes C-T and T-C were also the risk factors of RSA (OR = 1.673, 95% CI = 1.103-2.536; OR = 2.171, 95% CI = 1.372-2.436).MMP2 rs243865 and MMP9 rs3918242 polymorphisms are significantly associated with the risk of RSA in Chinese population.

Association between MMP2-1306 C/T polymorphism and prostate cancer susceptibility: a meta-analysis based on 3906 subjects

Numerous investigations have addressed the correlation between MMP2-1306C/T polymorphism and prostate cancer (PCa) susceptibility. However, these conclusions were controversial. Thus, we conducted this current meta-analysis based on six studies from PubMed, Embase, Cochrane Library, China Biology Medicine disc (CBM), China National Knowledge Infrastructure (CNKI) up to October 21^st, 2016. Odds ratios (ORs) with 95% confidence intervals (CIs) were calculated to evaluate the strength of the correlations. Additionally, different subgroup analyses and publication bias tests were performed. Eventually, six previous investigations consisted of 1920 cases and 1986 controls were identified and involved in this meta-analysis. Consequently, our evidence indicates a certain association between MMP2-1306C/T polymorphism and PCa risk among overall population (T vs C: OR = 1.12, 95% CI = 1.00-1.24, P = 0.040; TT+CT vs CC: OR = 1.16, 95% CI = 1.02-1.32, P = 0.026; respectively), as well as the subgroups of Asian population (T vs C: OR=1.48, 95% CI=1.13-1.94, P=0.004; TT+CT vs CC: OR = 1.66, 95% CI = 1.21-2.28, P = 0.002; respectively) and PCR-RFLP genotyped method (T vs C: OR = 1.58, 95% CI = 1.19-2.10, P = 0.001; TT+CT vs CC: OR = 1.71, 95% CI = 1.23-2.38, P = 0.001; respectively). However, no association was detected in MMP2-1306C/T polymorphism with Gleason grading or pathological stage of PCa. Our study indicates MMP2-1306 C/T polymorphism might increase PCa risk, particularly for Asian population. However, future studies comprising large cohort size from multicenter are required to confirm our conclusions.