Association between the estrogen receptor α gene polymorphisms rs2234693 and rs9340799 and severe and mild pre-eclampsia: a meta-analysis

Bisphenol A, S, and F exposure, ESR1/2, CAT, and eNOS genetic polymorphisms, and the risk of hypertension

While bisphenol A (BPA) exposure was inconsistently associated with hypertension risk, little is known about whether its alternatives bisphenol S and F (BPS and BPF) have similar hypertensive effects. Furthermore, epidemiologic studies on the genetic susceptibility to the hypertensive effects of bisphenols are scarce. We conducted a case-control study in 439 pairs of hypertension cases and matched controls. Urinary bisphenols concentrations were measured to characterize the internal exposure levels. The genotyping of ESR1/2, CAT, and eNOS was performed by a multiplex fluorescent polymerase chain reaction. BPA exposure was positively associated with hypertension risk. Carriers of rs2234693 C allele in ESR1 were associated with increased hypertension risk. Significant associations of BPA exposure with increased hypertension risk were suggested in individuals with the major allele of rs1256049 in ESR2, rs769214 in CAT, and rs1799983 in eNOS. Besides, rs4755374 in CAT might modify the association of BPA exposure with hypertension risk. Individuals with specific genotypes in ESR1/2, CAT, and eNOS might be more susceptible to the hypertensive effects of BPA.

Association between TNF-α polymorphisms and gestational diabetes mellitus: a meta-analysis and trial sequential analysis

AIM

Previous studies have yielded controversial results about the link between tumor necrosis factor-α (TNF-α) gene polymorphisms (rs1800629, rs361525, and rs1799724) and risk of gestational diabetes mellitus (GDM). Thus, a meta-analysis was performed to obtain a more conclusive result.

MATERIALS AND METHODS

Eligible studies were retrieved in PubMed, Embase, China National Knowledge Infrastructure, and Wanfang databases on February 18 2020. Odds ratios (ORs) with 95% confidence intervals (CIs) were utilized to evaluate the relationship between TNF-α polymorphisms and GDM susceptibility in five genetic models. The subgroup stratified analysis and trial sequential analysis (TSA) were both performed.

RESULTS

In total, 15 studies on TNF-α polymorphism including 1289 GDM patients and 1445 healthy women were identified. For rs1800629, significant associations were found in Asian subgroup in five genetic models (for example: allele model, p = .001, OR = 2.20, 95% CI = 1.38-3.52). The existing samples were adequate revealed by TSA, which reached a shred of solid evidence. No association was observed between TNF-α rs361525 and rs1799724 polymorphisms with the GDM risk within all genetic models (p > .05).

CONCLUSIONS

For Asian populations, TNF-α rs1800629 is a risk factor for GDM. There was no association between two TNF-α polymorphisms (rs361525 and rs1799724) and GDM under all genetic models. More multi-ethnic and larger sample size studies are needed to confirm these null associations.

A meta-analysis of the vascular endothelial growth factor polymorphisms associated with the risk of pre-eclampsia

Backgroud: Pre-eclampsia (PE) is a common pregnancy-induced hypertension disease. Some case–control studies reported the association between vascular endothelial growth factor (VEGF) gene polymorphisms (rs3025039, rs2010963) and PE risk. However, these associations were inconsistent in several studies. Therefore, we conducted this meta-analysis to assess the role of VEGF gene polymorphisms in PE more precisely.

Methods: Eligible studies were searched in PubMed, Embase, Web of Science and Chinese (Chinese National Knowledge Infrastructure (CNKI) and WanFang) databases. Statistical analyses were performed by Stata 12.0 software. Odds ratio (OR) and 95% confidence interval (CI) were used to assess the strength of the association. In addition, subgroup analyses, sensitive analyses and publication bias analyses were performed to further assess this meta-analysis.

Results: In total, 21 studies were included in the meta-analysis covering 2018 cases and 2632 controls. There were significant associations between VEGF polymorphisms (rs3025039, rs2010963) and PE risk in the overall populations. In the subgroup analyses, we found that rs3025039 polymorphism was associated with the increased risk of PE among Chinese. As for rs2010963 polymorphism, a significant association was observed in subgroup of Caucasian.

Conclusion: The present study suggested that the two VEGF gene polymorphisms (rs3025039, rs2010963) are associated with increased risk of PE in different ethnic groups, which means that the targets may be useful genetic markers for early prediction of PE.

Gene polymorphism associated with TGF-β1 and susceptibility to preeclampsia: A meta-analysis and trial sequential analysis

AIM

Mounts of researches focused on the link between transforming growth factor-beta 1 (TGF-β1) polymorphisms and preeclampsia (PE) which is a hypertensive multisystemic disorder affecting pregnancy. However, the results were inconsistent. Thus, a meta-analysis was performed to obtain more conclusive results.

METHODS

Eligible studies were searched in PubMed, Web of Science, EMBASE, and Scopus. Odds ratios (ORs) with 95% confidence intervals (CIs) were utilized to evaluate the relationship between six TGF-β1 polymorphisms (rs1800468, rs1800469, rs1800470, rs1800471, rs4803455, and rs4803457) and PE susceptibility in five genetic models. The subgroup stratified analysis and trial sequential analysis were performed.

RESULTS

Fourteen studies were included in this meta-analysis with 1941 PE patients and 2488 healthy women. There was no statistically significant association between these six TGF-β1 polymorphisms and PE within five genetic models in the overall population (all p > 0.05). Subgroup stratified analysis revealed there was statistically significant association between TGF-β1 rs1800469 polymorphism and PE within the allele, recessive, and homozygous model in Asian (OR = 1.17, 95% CI = 1.02-1.35; OR = 1.35, 95% CI = 1.06-1.72; OR = 1.48, 95% CI = 1.07-2.05, respectively; all p < 0.05). Trial sequential analysis indicated sufficient proof of such association in the Asian population.

CONCLUSIONS

TGF-β1 rs1800469 is a possible risk factor for PE in Asian populations.

Meta-analysis of the genetic association between maternal GNB3 C825T polymorphism and risk of pre-eclampsia

BACKGROUND

The relationship between the C825T polymorphism of GNB3 (encoding G-protein β3 subunit) and pre-eclampsia risk is unclear.

OBJECTIVE

To systematically explore the association between GNB3 C825T and pre-eclampsia.

SEARCH STRATEGY

PubMed, EMBASE, Google Scholar, and Chinese National Knowledge Infrastructure (CNKI) databases were searched to September 1, 2020, using keywords including "GNB3 C825T" and "pre-eclampsia".

SELECTION CRITERIA

Case-control and cohort studies investigating the relationship between GNB3 C825T polymorphism and pre-eclampsia were included.

DATA COLLECTION AND ANALYSIS

Two reviewers collected the data independently and calculate odds ratios (ORs) with 95% confidence intervals (CIs).

MAIN RESULTS

The meta-analysis involved eight studies from seven publications, including 2071 cases and 3419 controls. Overall analysis showed that GNB3 C825T was associated with increased pre-eclampsia risk in the recessive model (OR, 1.21; 95% CI, 1.01-1.44; P = 0.04). Subgroup analysis stratified by Hardy-Weinberg equilibrium revealed a relationship between GNB3 C825T and increased risk of pre-eclampsia in the allelic (OR, 1.66; 95% CI, 1.34-2.05; P < 0.001), homozygous (OR, 2.12, 95% CI, 1.04-4.32; P  = 0.04), dominant (OR, 1.91; 95% CI, 1.18-3.11; P = 0.009), and recessive (OR, 1.70; 95% CI, 1.03-2.81; P = 0.04) models.

CONCLUSIONS

Maternal GNB3 C825T polymorphism seems to be a risk factor for pre-eclampsia.

Functionally significant polymorphisms of ESR1and PGR and risk of intrauterine growth restriction in population of Central Russia

OBJECTIVE

This study aimed to investigate the role ofESR1 and PGR gene polymorphisms in development of intrauterine growth restriction (IUGR) among Russian women in Central Russia.

STUDY DESIGN

This case-control study recruited a total of 520 women in the third trimester of pregnancy, including 196 IUGR patients and 324 controls. The participants were unrelated women of self-reported Russian ethnicity. Participants were genotyped at 4 functionally significant polymorphisms of theESR1 (rs2234693, rs9340799) and the PGR (rs484389, rs1042838) genes. The association analysis was performed using logistic regression. Two polymorphisms, which were associated with IUGR, and 26 polymorphisms linked to them (r²≥0.6) were analyzed for their functional significance in silico.

RESULTS

Haplotype TG of loci rs2234693-rs9340799ESR1 (OR = 1.94, р_perm = 0.006) was associated with an increased risk of IUGR. Allele T of rs2234693 decreases expression of ESR1 in thyroid gland, allele T of rs2234693 and allele G of rs9340799 increase affinity to eight transcription factors (AP-4, HEN1, E2A, LBP-1, RP58, LUN, Ets and Hand). The loci that are linked (r²≥0.6) to the IUGR-associated SNPs, have the cis-eQTL value (expression ESR1 in thyroid gland) and showed their regulatory effects in organs and tissues related to pathogenesis of IUGR.

CONCLUSION

Haplotype TG defined by polymorphisms rs2234693-rs9340799 of theESR1 gene is associated with the development of IUGR in Russian women from Central Russia.