Circulating Irisin Level and Thyroid Dysfunction: A Systematic Review and Meta-Analysis

Both thyroid hormones and irisin have profound influences on the metabolism of the human body. Based on their similarities, several studies have been conducted to explore changes in irisin levels in patients with hypothyroidism and hyperthyroidism. This study was conducted in accordance with the PRISMA statement and the MOOSE reporting guideline. Based on a preregistered protocol (PROSPERO—CRD42019138430), a comprehensive search of eight databases was performed from inception to April 2020. Studies with original data collected from patients with thyroid dysfunction were included. Subgroup analysis was performed based on the different types of clinical manifestations and patient characteristics. The quality of each study and the presence of publication bias were assessed by the Newcastle-Ottawa score (NOS) and funnel plot with Egger’s test, respectively. A total of 11 studies with 1210 participants were included. Ten studies were identified as high-quality studies. Pooled analysis indicated decreased irisin levels in patients with hypothyroidism (MD -10.37, 95% CI -17.81 to -2.93). Subgroup analysis revealed an even lower level of irisin in patients with clinical-type hypothyroidism (MD -17.03, 95% CI -30.58 to -3.49) and hypothyroidism caused by autoimmune disease (MD -19.38, 95% CI -36.50 to -2.26). No differences were found after achieving euthyroid status from levothyroxine treatment in patients with hypothyroidism compared with controls. No differences were found between patients with hyperthyroidism and controls. Correlation analyses revealed a possible negative correlation between irisin and TSH and positive correlations between irisin and both fT3 and fT4. Irisin was correlated with TSH receptor antibodies.

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An updated association between TNF-α -238G/A polymorphism and gastric cancer susceptibility in East Asians

Bioscience Reports ◽

10.1042/bsr20181231 ◽

2018 ◽

Vol 38 (6) ◽

Cited By ~ 2

Author(s):

Hongpeng Zhao ◽

Lixia Liu ◽

Bo Liu ◽

Yanmin Wang ◽

Feng Li ◽

...

Keyword(s):

Gastric Cancer ◽

Subgroup Analysis ◽

Cancer Susceptibility ◽

Meta Analysis ◽

Gastric Diseases ◽

Increased Risk ◽

Tnf Α ◽

Comprehensive Search ◽

Different Populations ◽

Factor Α

Polymorphisms in the tumor necrosis factor α (TNF-α) gene are emerging as key determinants of gastric diseases. The TNF-α-238G/A single-nucleotide polymorphism (SNP) is the most extensively studied. However, this association is inconsistent amongst different populations. We therefore conducted an updated meta-analysis to obtain a more precise estimate of the association of TNF-α-238G/A polymorphism with gastric cancer (GC) risk. A comprehensive search of PubMed, Embase, Chinese (CNKI and WanFang) databases was performed to identify relevant studies through 5 May 2018. Odds ratio (OR) and 95% confidence interval (CI) were used to assess the strength of the association. Fourteen studies were included in our meta-analysis involving 2999 cases and 4685 controls. There was no significant association between TNF-α-238G/A polymorphism and GC risk in the overall populations. In the subgroup analysis, we found that TNF-α-238G/A polymorphism was associated with the increased risk of GC amongst Asians, especially in Chinese, but not in Caucasians. Subgroup analysis by genotyping methods revealed increased risk for other methods. In conclusion, our present meta-analysis shows that TNF-α-238G/A polymorphism is associated with the risk of GC in East Asian individuals.

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Selenium Level in Patients with Vitiligo: A Meta-Analysis

BioMed Research International ◽

10.1155/2020/7580939 ◽

2020 ◽

Vol 2020 ◽

pp. 1-7

Author(s):

Ting Dai ◽

Sun Xiaoying ◽

Xin Li ◽

Li Hongjin ◽

Zhou Yaqiong ◽

...

Keyword(s):

Subgroup Analysis ◽

Meta Analysis ◽

Selenium Level ◽

Serum Selenium ◽

Healthy Controls ◽

China National Knowledge Infrastructure ◽

Knowledge Infrastructure ◽

Significant Difference ◽

Comprehensive Search ◽

Caucasian Patients

Background. It has been reported that deficiency of selenium can cause autoimmune disease. This meta-analysis was aimed at evaluating whether there exits an association between selenium level and vitiligo. Methods. A comprehensive search was conducted on PubMed, Embase, China National Knowledge Infrastructure (CNKI), Wanfang Med Online, and China VIP databases from the inception to February 12, 2019. The main outcome was the standardized mean difference (SMD) with 95% confidence interval (CI) in serum selenium level between vitiligo patients and healthy controls. Results. A total of 8 studies with 305 vitiligo patients and 6156 healthy controls were included in this meta-analysis. The results showed that there was no significant difference in selenium level between vitiligo patients and healthy controls (SMD=0.481, 95%CI=−0.642 to 1.604, Z=0.840, P>0.05). Further subgroup analysis stratified by area revealed that Asian vitiligo patients had decreased selenium level, while that finding was not observed in Caucasian patients (Asian: SMD=−0.303, 95%CI=−0.603 to −0.004, P<0.05; Caucasian: SMD=0.957, 95%CI=−0.752 to 2.665, P>0.05). Conclusions. Although overall selenium level was similar between vitiligo patients and health controls, subgroup analysis showed decreased levels of selenium in Asian vitiligo patients. It may suggest a clinical tailored administration of selenium supplementation in Asian vitiligo patients.

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Meta-analysis

Epidemiological Studies: A Practical Guide ◽

10.1093/med/9780198814726.003.0022 ◽

2018 ◽

pp. 233-246

Author(s):

Alan J. Silman ◽

Gary J. Macfarlane ◽

Tatiana Macfarlane

Keyword(s):

Meta Analysis ◽

Original Data ◽

Epidemiological Studies ◽

Pooled Analysis ◽

Published Data ◽

Potential Bias ◽

Quantitative Synthesis ◽

Analysis Of Results ◽

Using Data

The previous chapter has discussed how to gather and evaluate existing evidence from epidemiological studies. Here further consideration is given to summarizing the identified evidence in such a way that it can be used for decision-making, including approaches to control for chance and potential bias. Meta-analysis refers to the statistical analysis of results from individual studies for integrating the findings. There are other terms related to meta-analysis such as quantitative review, combined analysis, pooled analysis, or quantitative synthesis. Some of them use different methods, for example, meta-analysis of published data considers each study as a unit of analysis while individual patient data analysis includes the original data from each study on a participant level. This chapter describes how to numerically summarize data through performing a meta-analysis using data from a systematic review of epidemiological studies. It also considers possible bias, reporting guidelines, and statistical software available for meta-analysis.

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An updated meta-analysis of XRCC4 rs1805377 polymorphism and the risk of cancer based on 23 case-control studies

10.21203/rs.2.16037/v1 ◽

2019 ◽

Author(s):

Xin-yuan Zhang ◽

Xiao-han Wei ◽

Bao-jie Wang ◽

Jun Yao

Keyword(s):

Subgroup Analysis ◽

Cancer Susceptibility ◽

Meta Analysis ◽

Statistical Significance ◽

Pooled Analysis ◽

Dna Double Strand Breaks ◽

Case Control Studies ◽

Cancer Susceptibility Genes ◽

Cancer Occurrence ◽

Risk Of Cancer

Abstract Background The growing studies reports that the genes participating in repairing of DNA double-strand breaks may be cancer-susceptibility genes. Rs1805377 (A>G) is a functional single nucleotide polymorphism (SNP) in the x-ray cross-complementing group 4 (XRCC4) gene that may be involved in the etiology of cancer. However, no conclusive results can be determined from individually published studies. Thus, we performed a meta-analysis to examine the association between XRCC4 rs1805377 polymorphism and cancer risk.Methods The potential literatures were searched using three online electronic databases (PubMed, Embase, and Web of Science). The available studies were included according to the inclusion criteria. The pooled analysis were performed to explore the association between XRCC4 rs1805377 locus and the risk of cancer. Additionally, we also performed subgroup analysis and sensitivity analysis.Results Twenty-three studies were included in our meta-analysis. It contained 9,433 cancer patients and 10,337 healthy controls. The pooled results showed that there was no association between rs1805377 and the risk of cancer. Under the dominant model, the final pooled odds ratios (ORs) was 1.115 (95% confidence intervals: 0.956-1.301; P = 0.165) in a random effects model without the statistical significance. The subgroup analysis by ethnicity and source of controls also didn’t find that rs1805377 polymorphism was related to cancer occurrence. In the subgroup by type of cancers, the significant association was only found in gastric antrum adenocarcinoma.Conclusions our meta-analysis suggested that there was no association between rs1805377 polymorphism and cancer occurrence. It may provide useful information for the relevant studies on the etiology of cancer in future.

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The prognosis benefits of adjuvant versus salvage radiotherapy for patients after radical prostatectomy with adverse pathological features: a systematic review and meta-analysis

Radiation Oncology ◽

10.1186/s13014-019-1384-z ◽

2019 ◽

Vol 14 (1) ◽

Cited By ~ 1

Author(s):

Ronggui Tao ◽

Jindong Dai ◽

Yunjin Bai ◽

Jiyu Yang ◽

Guangxi Sun ◽

...

Keyword(s):

Systematic Review ◽

Radical Prostatectomy ◽

Subgroup Analysis ◽

Meta Analysis ◽

Final Analysis ◽

Pooled Analysis ◽

Salvage Radiotherapy ◽

Cochrane Library ◽

Pathological Features ◽

Free Survival

Abstract Background The appropriate timing of radiotherapy (RT) for patients after radical prostatectomy (RP) with adverse pathological features (APFs) remains controversial. This systematic review was conducted to compare the efficacy of adjuvant radiotherapy (ART) and salvage radiotherapy (SRT). Methods PubMed, EMBASE, Web of Science and the Cochrane Library electronic databases were searched to retrieve the required. The hazard ratio (HR) and corresponding 95% confidence interval (CI) of overall survival (OS), biochemical recurrence-free survival (BRFS) and distant metastases-free survival (DMFS) were extracted. The survival benefits of ART with SRT (including early salvage radiotherapy (ESRT)) were analyzed. The process of the meta-analysis was performed with RevMan version 5.3. Results A total of fifteen retrospective studies were finally included in the final analysis including 5586 patients. The pooled analysis indicated that ART could achieve better control of prostate cancer and improve OS (p = 0.0006), BRFS (p < 0.0001) and DMFS (p < 0.0001), when compared to SRT. The subgroup analysis of the 5-year OS rate demonstrated that the ART group still had survival advantages compared to the SRT group (p = 0.0006). However, ART and SRT were comparable in 10-year OS rate (p = 0.07). ART had advantages over SRT in both 5-year (p = 0.0003) and 10-year BRFS (p = 0.0003). The subgroup analysis with different follow-up starting points from RP or RT was essentially consistent with the above results. The pooled analysis also showed that ART was superior to ESRT on OS (p = 0.008) and DMFS (p = 0.03), and comparable to ESRT on BRFS (p = 0.1). Conclusions According to this meta-analysis, ART could be served as a preferential treatment for patients with APFs after RP to improve prognosis. Certainly, high-quality, multicenter randomized controlled trials (RCTs) are expecting to confirm the outcomes of our meta-analysis in the future.

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Subclinical thyroid dysfunction and incident atrial fibrillation - a systematic review and meta-analysis

EP Europace ◽

10.1093/europace/euab116.153 ◽

2021 ◽

Vol 23 (Supplement_3) ◽

Author(s):

H Singh ◽

MZ Shahid ◽

SL Harrison ◽

DA Lane ◽

GYH Lip ◽

...

Keyword(s):

Atrial Fibrillation ◽

Systematic Review ◽

Subgroup Analysis ◽

Subclinical Hypothyroidism ◽

Thyroid Dysfunction ◽

Meta Analysis ◽

Risk Of Bias ◽

Subclinical Hyperthyroidism ◽

Quality Of Evidence

Abstract Funding Acknowledgements Type of funding sources: Other. Main funding source(s): This project was supported by the MRes programme in the Institute of Life Course and Medical Sciences at The University of Liverpool. Thyroid hormones can act directly and indirectly on the cardiovascular system and studies have demonstrated associations between overt and subclinical thyroid dysfunction and adverse cardiovascular outcomes including heart failure, myocardial infarction, and coronary heart disease. The aim of this study was to assess the association between subclinical thyroid dysfunction and atrial fibrillation (AF). The protocol was registered on PROSPERO (CRD42020221565). MEDLINE and Scopus were searched from inception to 13th November 2020 for studies investigating subclinical thyroid dysfunction and incident AF. Risk of bias was assessed using the Risk of Bias Assessment Tool (RoBANS). The quality of evidence was assessed using the Grading of Recommendations, Assessment, Development, and Evaluations (GRADE) tool. Subgroup analysis was performed for post-operative and non-post-operative AF. 5413 records were identified. Nine cohort studies were suitable for inclusion in the systematic review, of which seven studies were included in the meta-analysis. The meta-analysis comprised 595,058 patients. Subclinical hyperthyroidism was associated with a 99% increase in the risk of incident AF (Risk ratio (RR): 1.99; 95% confidence intervals (CI); 1.43 to 2.77; p < 0.0001; I² = 67%). Subclinical hypothyroidism was also associated with a greater risk of AF (RR: 1.24; 95% CI; 1.05 to 1.47; p = 0.01; I² = 65%). Subgroup analysis demonstrated a 76% increase in the risk of post-operative AF in patients with subclinical hypothyroidism compared to euthyroid post-operative patients (RR: 1.76; 95% CI; 1.36 to 2.28; p < 0.0001; I² = 0%). Six studies were rated as low risk of bias and three as medium risk of bias according to the RoBANS tool. The quality of evidence for AF in subclinical hyper- and hypothyroid patients was low. Subclinical hyperthyroidism and subclinical hypothyroidism were associated with a higher risk of incident AF and post-operative AF, respectively. The quality of the current evidence is low and ideally a randomised controlled trial should be conducted to confirm these associations and assess impacts of treatments. Abstract Figure.

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Association of IRF6 rs2235371 Polymorphism with Non-Syndromic Cleft Lip/Palate: A Meta-analysis

World Journal of Peri & Neonatology ◽

10.18502/wjpn.v4i1.7541 ◽

2021 ◽

Author(s):

Hossein Neamatzadeh ◽

Masoud Zare-Shehneh ◽

Mahta Mazaheri ◽

Karim Daliri ◽

Elahe Akbarian ◽

...

Keyword(s):

Cleft Lip ◽

Web Of Science ◽

Meta Analysis ◽

Pooled Analysis ◽

Recessive Model ◽

Published Data ◽

Regulatory Factor ◽

Interferon Regulatory Factor 6 ◽

Cleft Lip Palate ◽

Comprehensive Search

Background: The previous published data on the association between interferon regulatory factor 6 (IRF6) polymorphisms and non-syndromic Cleft Lip/Palate (NSCL ± P) risk remained inconclusive. The aim of this study was to conduct a meta-analysis to further assess the associations. Methods: A comprehensive search in PubMed, EMBASE, Web of Science, and CNKI for all eligible studies up July 2021. Results: A total of 23 studies with 6,161 cases and 8,919 controls were selected for this meta-analysis. Overall pooled analysis suggest a significant association between IRF6 rs2235371 polymorphism and CL±P risk under all the five genetic models, i.e., allele (A vs. G: OR=0.754, 95% CI 0.628-0.905, P=0.002), homozygote (AA vs. GG: OR=0.621 95% 0.405-0.953, P=0.029), heterozygote (AC vs. GG: OR=0.619, 95% CI 0.485-0.791, P≤0.001), dominant (AA+AG vs. GG: OR=0.550, 95% CI 0.381-0.794, P=0.001) and recessive model (AA vs. AG+GG: OR=0.583, 95% CI 0.423-0.804, P=0.001). Subgroup analysis by ethnicity showed that rs2235371 was associated with NSCL±P risk in Asians. Conclusion: This meta-analysis provides strong evidences that IRF6 rs2235371 might be associated with risk of NSCL ± P.

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The genome-wide supported CACNA1C gene polymorphisms and the risk of schizophrenia: an update meta-analysis

10.21203/rs.2.24453/v1 ◽

2020 ◽

Author(s):

Yongping Liu ◽

Xue Wu ◽

Xi Xia ◽

Jun Yao ◽

Bao-jie Wang

Keyword(s):

Subgroup Analysis ◽

Meta Analysis ◽

Pooled Analysis ◽

Recessive Model ◽

Contrast Model ◽

Influence Model ◽

Genome Wide ◽

Meta Analyses ◽

Allele Contrast ◽

European Populations

Abstract Background: The CACNA1C gene was defined as the risk gene for schizophrenia in a large GWAS of European ancestory by Psychiatric Genomics Consortium. Previous meta-analyses have focused on the association between CACNA1C gene rs1006737 and schizophrenia. However, the present study focused on whether there was a racial difference in the effect of CACNA1C gene rs1006737 on schizophrenia. In addition, rs2007044 and rs4765905 were used to analyzed the risk of schizophrenia.Methods: The pooled analysis, subgroup analysis, sensitivity analysis and publication bias were conducted.Results: A total of 18 studies met the inclusion criteria, 14 for rs1006737 (15,213 cases and 19,412 controls), 3 for rs2007044 (6007 cases and 6,518 controls), and 2 for rs4765905 (2,435 cases and 2,639 controls). Rs2007044 and rs4765905 were also related to schizophrenia in the only conducted allele model. For rs1006737, the allele contrast model, dominant model, recessive model, codominance models, and complete overdominance model were performed, and the overall meta-analysis showed significant differences between rs1006737 and schizophrenia. However, race-based subgroup analysis of rs1006737 and found that the genotypes GG and GG+GA were only protective factors for schizophrenia in European populations, while the GA genotype of rs1006737 only reduced the risk of schizophrenia in Asian populations.Conclusions: Rs1006737, rs2007044 and rs4765905 of CACNA1C gene were associated with susceptibility to schizophrenia. However, the influence model of rs1006737 on schizophrenia in Asian and European populations have both similarities and differences.

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Systematic review and meta-analysis of Altruistic and Game-playing Love

10.31234/osf.io/fd7j8 ◽

2020 ◽

Author(s):

Hossein Dabiriyan Tehrani ◽

Sara Yamini

Keyword(s):

Systematic Review ◽

Subgroup Analysis ◽

Meta Analysis ◽

Game Playing ◽

Love Styles ◽

Collectivistic Culture ◽

Meta Regression ◽

Collectivistic Cultures ◽

The Relationship

This systematic review aimed to find attitudes toward Altruistic and Game-playing love styles across individualistic and collectivistic cultures. Addressing major moderators concerning Altruistic and Game-playing love styles are the secondary objectives of this review. This review included 102 articles comprising samples from 37 countries (N = 41997). The findings of this meta-analysis show that there is a collectivistic and individualistic difference in Game-playing but not in the Altruistic love style. Collectivistic and individualistic cultures, on average, demonstrate the same perception concerning the Altruistic love style, whereas collectivistic culture shows the Game-playing love style more strongly. To explain the role of moderators in key measures, the subgroup analysis and meta-regression show that both Game-playing and Altruistic love styles decline by increasing the length of the relationship. Likewise, having children affects these love styles such that the Altruistic love style is improved, and the Game-playing love style is reduced by the presence of children in families.

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