scholarly journals Obesity and Pro12Ala Polymorphism of Peroxisome Proliferator-Activated Receptor-Gamma Gene in Healthy Adults: A Systematic Review and Meta-Analysis

2015 ◽  
Vol 67 (2) ◽  
pp. 104-118 ◽  
Author(s):  
Anahita Mansoori ◽  
Maryam Amini ◽  
Fariba Kolahdooz ◽  
Ensiyeh Seyedrezazadeh
Keyword(s):  
Systematic Review ◽  
Meta Analysis ◽  
Healthy Adults ◽  
Peroxisome Proliferator ◽  
Dominant Model ◽  
Weighted Mean ◽  
Pro12ala Polymorphism ◽  
Peroxisome Proliferator Activated Receptor ◽  
Mean Differences ◽  
The Relationship

Background: The aim of this systematic review was to evaluate the relationship between obesity and peroxisome proliferator-activated receptor-gamma (PPARγ) Pro12Ala polymorphism in healthy adults. Summary: Weighted mean differences (WMDs) of body mass index (BMI) were calculated for different inheritance models and subgroups. Fifty-six studies were eligible for inclusion in the meta-analysis. The result shows that the Ala allele of this polymorphism was associated with increased WMD in mean BMI (WMD = 0.29, 95% CI 0.10-0.48, p = 0.003). The Ala carriers were associated with increased WMD in mean BMI values in both genders and in the Caucasian subgroup. The associations were seen among people with higher levels of BMI (BMI ≥35). Message: The Ala allele of the PPARγ Pro12Ala polymorphism in healthy adults was associated with increased BMI under a dominant model of inheritance.

scholarly journals Effect of somatometric parameters on the prevalence and severity of varicocele: a systematic review and meta-analysis

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Runqing Li ◽  
Junjie Liu ◽  
Yushan Li ◽  
Quanxian Wang
Keyword(s):  
Systematic Review ◽  
Meta Analysis ◽  
Cochrane Library ◽  
China National Knowledge Infrastructure ◽  
Random Effects Models ◽  
Knowledge Infrastructure ◽  
Regression Test ◽  
Mean Differences ◽  
Q Statistic ◽  
The Relationship

Abstract Background Published studies have shown contradictory results regarding the relationship between somatometric parameters and varicoceles. We performed a systematic review and meta-analysis to investigate the possible effects of age, height, weight, and body mass index (BMI) on the presence and severity of varicoceles. Methods Databases including EMBASE, MEDLINE, PubMed, Cochrane Library, China National Knowledge Infrastructure (CNKI), Web of Science, and Google Scholar were systematically searched to identify relevant articles published up to March 2020. Two researchers independently identified eligible articles and extracted data. Cochran’s Q statistic and I2 statistics were used to assess heterogeneity. Meta-analysis was performed using StataSE 12.0 software (StataCorp LP, USA). Random-effects models were used to obtain the weighted mean differences (WMDs) and 95% confidence intervals (CIs). Publication bias was assessed using Begg’s funnel plot and Egger’s regression test. Results The search strategy produced 272 articles, of which 18 articles were eligible according to the inclusion/exclusion criteria. A total of 56,325 patients with varicocele and 1,334,694 patients without varicocele were included in the meta-analysis to evaluate the effect of somatometric parameters on the presence and severity of varicocele. The overall results demonstrated that the presence of varicoceles was significantly associated with height (WMD = 1.41, 95% CI = 1.07 to 1.74, P < 0.001) and inversely correlated with BMI (WMD = − 1.35, 95% CI = -1.67 to − 1.03, P < 0.001) but not with age (WMD = -0.93, 95% CI = -2.19 to 0.33, P = 0.149) or weight (WMD = 0.24, 95% CI = -2.24 to 2.72, P = 0.850). The severity of varicocele was inversely correlated with increased BMI but not with age. Conclusion The presence of varicoceles was significantly associated with height and inversely correlated with BMI.

scholarly journals Melatonin and Cardioprotection in Humans: A Systematic Review and Meta-Analysis of Randomized Controlled Trials

2021 ◽  
Vol 8 ◽  
Author(s):  
Alberto Domínguez-Rodríguez ◽  
Pedro Abreu-González ◽  
Néstor Báez-Ferrer ◽  
Russel J. Reiter ◽  
Pablo Avanzas ◽  
...  
Keyword(s):  
Systematic Review ◽  
Randomized Controlled Trials ◽  
Meta Analysis ◽  
Mean Difference ◽  
Left Ventricular Ejection ◽  
Favorable Effect ◽  
Controlled Trials ◽  
Weighted Mean ◽  
Randomized Controlled ◽  
Mean Differences

Myocardial ischemia/reperfusion (IR) injury represents a critical problem associated with interventional approaches for coronary reperfusion. Pharmacological cardioprotective interventions are advocated to ameliorate IR injury. Melatonin is an anti-inflammatory and antioxidant agent with a wide range of therapeutic properties that may contribute to its cardioprotective effects. No systematic review or meta-analysis has compared melatonin vs. placebo as a cardioprotective agent in humans. The present study, based on a systematic review and meta-analysis, was carried out to assess melatonin's efficacy as a cardioprotective treatment. We performed a systematic review of the available literature. Randomized controlled trials (RCTs) were identified and information was extracted using predefined data extraction forms. The primary outcomes were (a) left ventricular ejection fraction (LVEF) and (b) blood troponin levels in patients who underwent myocardial revascularization and were randomized to melatonin or placebo. The inverse-variance random-effects method was used to pool the estimates. Heterogeneity and publication bias were assessed. Weighted mean differences or standardized mean differences were calculated. A total of 283 records were screened and seven RCTs met all the inclusion criteria. After the pooled analysis, the results on LVEF were consistent across all studies, and a significant heterogeneity was found in the results on troponin levels. The melatonin-treated patients had on average higher LVEF than the placebo-treated individuals with a weighted mean difference = 3.1% (95% CI 0.6–5.5, p = 0.01). Five works compared the levels of troponin after melatonin or placebo treatment. The melatonin-treated patients had lower levels of troponin with a standardized mean difference = −1.76 (95% CI −2.85 to −0.67, p = 0.002). The findings of this meta-analysis revealed that melatonin administration in humans as a cardioprotective agent attenuated heart dysfunction with a favorable effect on the LVEF.

Associations of Leptin Receptor and Peroxisome Proliferator-Activated Receptor Gamma Polymorphisms with Polycystic Ovary Syndrome: A Meta-Analysis

2019 ◽  
Vol 75 (1) ◽  
pp. 1-8
Author(s):  
Jialang Liang ◽  
Jiarong Lan ◽  
Min Li ◽  
Fang Wang
Keyword(s):  
Polycystic Ovary Syndrome ◽  
Leptin Receptor ◽  
Genetic Model ◽  
Polycystic Ovary ◽  
Meta Analysis ◽  
Peroxisome Proliferator ◽  
Ovary Syndrome ◽  
Peroxisome Proliferator Activated Receptor ◽  
Subgroup Analyses ◽  
The Relationship

Background: Previous studies on associations of leptin receptor (LEPR) and peroxisome proliferator-activated receptor gamma (PPARG) polymorphisms with polycystic ovary syndrome (PCOS) yielded conflicting results. Objectives: In this meta-analysis, we aimed to better analyze the relationship between LEPR/PPARG polymorphisms and PCOS in a larger pooled population. Methods: We performed a systematic search of PubMed, Web of Science, Embase and CNKI. We calculated pooled ORs and 95% CIs to estimate associations between LEPR/PPARG polymorphisms and PCOS. Results: Totally, 33 eligible studies were included. A significant association with susceptibility to PCOS was observed for LEPR rs1137101 polymorphism under recessive genetic model (p = 0.002, OR 1.88, 95% CI 1.26–2.78, I2 = 42%) and for PPARG rs1801282 polymorphism under dominant (p = 0.007, OR 1.20, 95% CI 1.05–1.36, I2 = 49%), overdominant (p = 0.02, OR 0.85, 95% CI 0.74–0.97, I2 = 48%), and allele (p = 0.006, OR 1.18, 95% CI 1.05–1.33, I2 = 47%) genetic models in overall population. Further subgroup analyses by ethnicity revealed that LEPR rs1137101 and PPARG rs3856806 polymorphisms were both significantly associated with susceptibility to PCOS in Asians. No any positive results were detected in overall and subgroup analyses. Conclusions: Our meta-analysis suggested that LEPR rs1137101, PPARG rs1801282, and rs3856806 polymorphisms were all significantly associated with individual susceptibility to PCOS in certain populations.

Sign in / Sign up

Export Citation Format

Share Document