scholarly journals A Systematic Review and Meta-Analysis for the Association of Gene Polymorphisms in RAN with Cancer Risk

2020 ◽  
Vol 2020 ◽  
pp. 1-11 ◽  
Author(s):  
Yanke Li ◽  
Fuqiang Zhang ◽  
Chengzhong Xing
Keyword(s):  
Systematic Review ◽  
Cancer Risk ◽  
Nuclear Protein ◽  
Cancer Susceptibility ◽  
Data Extraction ◽  
Meta Analysis ◽  
Critical Role ◽  
Predictive Biomarkers ◽  
Population Based ◽  
Genetic Biomarkers

As an important component of miRNA processing genes, RAN gene encodes the ras-related nuclear protein, which is a unique member of the Ras superfamily of GTPases. The mutations in RAN gene are very likely to play a critical role in pathology-related changes to miRNA transport and expression and thus participate in tumor genesis and development. Currently, accumulating studies have explored the association between RAN SNPs and cancer risk. However, the results are conflicting. In the present study, we performed a systematic review for the association of RAN SNPs with overall cancer risk. Meanwhile, a meta-analysis was conducted based on available data, aiming at clarifying the association between RAN SNPs and cancer susceptibility. After literature search and data extraction, 17 studies containing four RAN SNPs were involved in the systematic review. And 12 studies with two highly studied SNPs (RAN rs14035 C>T and rs3803012 A>G) were included in the final meta-analysis, consisting of 7662 cases and 9807 controls. The results showed that the rs14035 polymorphism was linked to a decreased cancer risk in overall subjects and hospital-based (HB) subgroup, while the rs3803012 polymorphism conferred to an increased cancer risk in overall subjects and population-based (PB) subgroup. Our findings suggested that the two SNPs had the potential to be predictive biomarkers for cancer risk. The study would provide novel clues for the identification of miRNA-related genetic biomarkers applied to predicting cancer susceptibility.

scholarly journals Association of miRNA biosynthesis genes DROSHA and DGCR8 polymorphisms with cancer susceptibility: a systematic review and meta-analysis

2018 ◽  
Vol 38 (3) ◽  
Author(s):  
Jing Wen ◽  
Zhi Lv ◽  
Hanxi Ding ◽  
Xinxin Fang ◽  
Mingjun Sun
Keyword(s):  
Cancer Risk ◽  
Genetic Model ◽  
Cancer Susceptibility ◽  
Meta Analysis ◽  
Population Based ◽  
Nucleotide Polymorphisms ◽  
Case Control Studies ◽  
Exclusion Criteria ◽  
Single Nucleotide ◽  
Stratified Analysis

Single nucleotide polymorphisms (SNPs) in miRNA biosynthesis genes DROSHA and DGCR8 were indicated to be correlated with cancer risk. We comprehensively reviewed and analyzed the effect of DROSHA and DGCR8 polymorphisms on cancer risk. Eligible articles were selected according to a series of inclusion and exclusion criteria. Consequently, ten case–control studies (from nine citations) with 4265 cancer cases and 4349 controls were involved in a meta-analysis of seven most prevalent SNPs (rs10719 T/C, rs6877842 G/C, rs2291109 A/T, rs642321 C/T, rs3757 G/A, rs417309 G/A, rs1640299 T/G). Our findings demonstrated that the rs417309 SNP in DGCR8 was significantly associated with an elevated risk of overall cancer in every genetic model. In stratified analysis, correlations of DROSHA rs10719 and rs6877842 SNPs were observed in Asian and laryngeal cancer subgroups, respectively. Moreover, associations of the rs417309 SNP could also be found in numerous subgroups including: Asian and Caucasian population subgroups; laryngeal and breast cancer subgroups; population-based (PB) and hospital-based (HB) subgroups. In conclusion, the DROSHA rs10719, rs6877842 SNPs, and DGCR8 rs417309 SNP play pivotal roles in cancerogenesis and may be potential biomarkers for cancer-forewarning.

scholarly journals Obesity is associated with increased severity of disease in COVID-19 pneumonia: a systematic review and meta-analysis

2020 ◽  
Vol 25 (1) ◽  
Author(s):  
Yanan Chu ◽  
Jinxiu Yang ◽  
Jiaran Shi ◽  
Pingping Zhang ◽  
Xingxiang Wang
Keyword(s):  
Systematic Review ◽  
Hospital Mortality ◽  
Disease Progression ◽  
Fixed Effects ◽  
Data Extraction ◽  
Meta Analysis ◽  
Critical Role ◽  
Invasive Mechanical Ventilation ◽  
Poor Outcomes ◽  
The Impact

Abstract Background Obesity has been widely reported to be associated with the disease progression of coronavirus disease 2019 (COVID-19); however, some studies have reported different findings. We conducted a systematic review and meta-analysis to investigate the association between obesity and poor outcomes in patients with COVID-19 pneumonia. Methods A systematic review and meta-analysis of studies from the PubMed, Embase, and Web of Science databases from 1 November 2019 to 24 May 2020 was performed. Study quality was assessed, and data extraction was conducted. The meta-analysis was carried out using fixed-effects and random-effects models to calculate odds ratios (ORs) of several poor outcomes in obese and non-obese COVID-19 patients. Results Twenty-two studies (n = 12,591 patients) were included. Pooled analysis demonstrated that body mass index (BMI) was higher in severe/critical COVID-19 patients than in mild COVID-19 patients (MD 2.48 kg/m2, 95% CI [2.00 to 2.96 kg/m2]). Additionally, obesity in COVID-19 patients was associated with poor outcomes (OR = 1.683, 95% CI [1.408–2.011]), which comprised severe COVID-19, ICU care, invasive mechanical ventilation use, and disease progression (OR = 4.17, 95% CI [2.32–7.48]; OR = 1.57, 95% CI [1.18–2.09]; OR = 2.13, 95% CI [1.10–4.14]; OR = 1.41, 95% CI [1.26–1.58], respectively). Obesity as a risk factor was greater in younger patients (OR 3.30 vs. 1.72). However, obesity did not increase the risk of hospital mortality (OR = 0.89, 95% CI [0.32–2.51]). Conclusions As a result of a potentially critical role of obesity in determining the severity of COVID-19, it is important to collect anthropometric information for COVID-19 patients, especially the younger group. However, obesity may not be associated with hospital mortality, and efforts to understand the impact of obesity on the mortality of COVID-19 patients should be a research priority in the future.

scholarly journals Association between eczema and major cardiovascular outcomes in population-based studies: a systematic review protocol

BMJ Open ◽  
2017 ◽  
Vol 7 (9) ◽  
pp. e017979 ◽  
Author(s):  
Anna Ascott ◽  
Ashley M Yu ◽  
Morten Schmidt ◽  
Katrina Abuabara ◽  
Liam Smeeth ◽  
...  
Keyword(s):  
Systematic Review ◽  
Inflammatory Diseases ◽  
Data Extraction ◽  
Meta Analysis ◽  
Epidemiological Data ◽  
Epidemiological Studies ◽  
Cardiovascular Death ◽  
Population Based ◽  
Cardiovascular Outcomes ◽  
Cross Sectional

IntroductionChronic inflammatory diseases such as eczema (also known as atopic dermatitis) have been inconsistently linked to cardiovascular disease and stroke in both mechanistic and epidemiological studies. There is a need to review the existing epidemiological data examining the association between eczema and major cardiovascular outcomes, including angina, myocardial infarction, coronary revascularisation, heart failure, cardiac arrhythmias, stroke and cardiovascular death, in order to improve our understanding of the comorbidities of eczema.Methods and analysisWe will systematically review population-based studies, including cohort, case–control and cross-sectional studies, reporting on the association between eczema and cardiovascular outcomes. We will search Medline, Embase and Global Health, from their date of inception to April 2017, using a comprehensive search strategy formulated with the help of a librarian. Two reviewers will independently screen titles and abstracts in duplicate, followed by independent data extraction and quality assessment. We will group studies by the cardiovascular outcome under study and synthesise them narratively. If sufficient numbers of homogeneous studies are returned, we will perform meta-analyses to obtain pooled effect estimates. Preferred Reporting Items for Systematic Review and Meta-Analysis will be used to inform the reporting of this study.Trial registration numberCRD42017060359.

scholarly journals  Prevalence Of Vitamin B Complex Deficiencies In Women In Reproductive Age, Pregnant Or Lactating Woman In Brazil: A Systematic Review And Meta-Analysis Protocol

2021 ◽  
Author(s):  
Michel Carlos Mocellin ◽  
Cintia Chaves Curioni ◽  
Alessandra da Silva Pereira ◽  
Simone Augusta Ribas ◽  
Michelle Teixeira Teixeira ◽  
...  
Keyword(s):  
Systematic Review ◽  
Data Extraction ◽  
Meta Analysis ◽  
Population Based ◽  
B Vitamins ◽  
Reproductive Age ◽  
Vitamin B ◽  
Prevalence Rates ◽  
Eligibility Criteria ◽  
Cross Sectional

Abstract Background: Complex B vitamin deficiency are involved with several outcomes in fertility and pregnancy. In Brazil, the national prevalence rates of these micronutrients deficiencies in women at reproductive age was not known. Therefore, this study aims to systematically identify, select, evaluate, analyze and report the prevalence rates of complex B vitamins deficiencies in women at reproductive age in Brazil, and identify variables that may modify the outcome rates.Methods: A systematic review will be conducted guided by the following question: “What is the prevalence of vitamin B complex deficiencies in women at reproductive age in Brazil?”. The studies will be identified and selected from a literature search using electronic databases, consultation to researchers/specialists, as well as reference lists of eligible studies and reviews on the topic. Major eligibility criteria include observational cross-sectional and cohort studies performed in women with 10-49 years old from Brazil; pregnant and lactating mothers; and which that investigated the deficiency of complex B vitamins by laboratorial test. Two reviewers independently will perform the screening and selection of studies, to subsequently perform data extraction and risk assessment of bias. For data report, a narrative approach will be used to summarize the characteristics of the included studies and the individual prevalence found for each micronutrient tested, and if the studies are sufficiently homogeneous, a quantitative synthesis (meta-analysis) will be performed.Discussion: Identify the national and regional prevalence rates of complex B vitamins deficiencies allow the policy makers discuss, plan and implement public policy to prevent and/or reduces the rates, if they are larger, or at least highlight discussions about a program of screening the vitamins deficiencies in this specific population for to know the epidemiologic scenario among the years, serving as an indirect indicator of the socioeconomic and dietary patterns of this population. Also, specifically for folates, this study allows to compare the prevalence rates of deficiency of this vitamin before and after the mandatory fortification of wheat and corn flours implemented since 2004. Nevertheless, the evidence gathered may highlight the need for population-based studies to investigate the deficiency of these vitamins.Systematic review registration: PROSPERO registration number: CRD42020188474

scholarly journals Synchronous and Metachronous Thoracic Aortic Aneurysms in Patients With Abdominal Aortic Aneurysms: A Systematic Review and Meta‐Analysis

2020 ◽  
Vol 9 (21) ◽  
Author(s):  
Ryan Gouveia e Melo ◽  
Gonçalo Silva Duarte ◽  
Alice Lopes ◽  
Mariana Alves ◽  
Daniel Caldeira ◽  
...  
Keyword(s):  
Systematic Review ◽  
Data Extraction ◽  
Meta Analysis ◽  
Abdominal Aortic Aneurysms ◽  
Population Based ◽  
Aortic Aneurysms ◽  
Cochrane Central Register ◽  
Thoracic Aortic Aneurysms ◽  
Abdominal Aortic ◽  
Increased Risk

Background The prevalence of thoracic aortic aneurysms (TAA) in patients with known abdominal aortic aneurysms (AAA) is not well known and understudied. Our aim was to conduct a systematic review and meta‐analysis of the overall prevalence of synchronous and metachronous TAA (SM‐TAA) in patients with a known AAA and to understand the characteristics of this sub‐population. Methods and Results We searched MEDLINE, EMBASE, and CENTRAL (Cochrane Central Register of Controlled Trials) from inception to November 2019 for all population‐based studies reporting on the prevalence of SM‐TAAs in a cohort of patients with AAA. Article screening and data extraction were performed by 2 authors and data were pooled using a random‐effects model of proportions using Freeman‐Tukey double arcsine transformation. The main outcome was the prevalence of SM‐TAAs in patients with AAAs. Secondary outcomes were the prevalence of synchronous TAAs, metachronous TAAs, prevalence of TAAs in patients with AAA according to the anatomic location (ascending, arch, and descending) and the differences in prevalence of these aneurysms according to sex and risk factors. Six studies were included. The pooled‐prevalence of SM‐TAA in AAA patients was 19.2% (95% CI, 12.3–27.3). Results revealed that 15.2% (95% CI, 7.1–25.6) of men and 30.7% (95% CI, 25.2–36.5) of women with AAA had an SM‐TAA. Women with AAA had a 2‐fold increased risk of having an SM‐TAA than men (relative risk [RRs], 2.16; 95% CI, 1.32–3.55). Diabetes mellitus was associated with a 43% decreased risk of having SM‐TAA (RRs, 0.57; 95% CI, 0.41–0.80). Conclusions Since a fifth of AAA patients will have an SM‐TAA, routine screening of SM‐TAA and their clinical impact should be more thoroughly studied in patients with known AAA.

Polymorphism of HSD17B1 Ser312Gly with Cancer Risk: Evidence from 66,147 Subjects

2016 ◽  
Vol 19 (2) ◽  
pp. 136-145 ◽  
Author(s):  
Lijun Shi ◽  
Xue Yang ◽  
Xin Dong ◽  
Botao Zhang
Keyword(s):  
Cancer Risk ◽  
Large Scale ◽  
Cancer Susceptibility ◽  
Meta Analysis ◽  
Population Based ◽  
Dependent Manner ◽  
Hormone Metabolism ◽  
Sex Steroid Hormone ◽  
Polymorphic Variants ◽  
Stratified Analysis

Hydroxysteroid (17-beta)dehydrogenase 1(HSD17B1) plays a central role in sex steroid hormone metabolism. HSD17B1 polymorphic variants may contribute to cancer susceptibility. Numerous investigations have been conducted to assess the association between HSD17B1 Ser312Gly polymorphism and cancer risk in multiple ethnicities, yet these have produced inconsistent results. We therefore performed this comprehensive meta-analysis to attempt to provide a quality assessment of the association of interest. Odds ratios (ORs) with 95% confidence intervals (CIs) were used to evaluate the strength of associations. After a systematic literature search of several major public databases, 20 studies involving 29,460 cases and 36,687 controls were included in this meta-analysis. No significant association was found between HSD17B1 Ser312Gly polymorphism and cancer risk. However, Ser312Gly polymorphism showed a significantly decreased risk for Caucasians (there were 44,284 Caucasians for analysis, comprising 19,889 cases and 24,395 controls) in the subgroup analysis by ethnicity (dominant: OR = 0.958, 95% CI = 0.919–0.998; and allele comparing: OR = 0.973, 95% CI = 0.947–0.999). And there was the same trend towards risk in the population-based (PB) controls (homozygous: OR = 0.951, 95% CI = 0.908–0.997 and allele comparing: OR = 0.976, 95% CI = 0.954–0.999), but not among Asians or hospital-based (HB) controls. In addition, no association was observed in the stratified analysis for breast cancer studies by source of control, ethnicity and quality score. These findings suggested that the HSD17B1 Ser312Gly polymorphism might confer genetic cancer susceptibility in an ethnic-dependent manner, especially among Caucasians. Well-designed, large-scale studies are warranted to validate these findings.

scholarly journals Estimated prevalence of dental fear in adults: a systematic review and meta-analysis

2020 ◽  
Author(s):  
Ethieli R. Silveira ◽  
Mariana G. Cademartori ◽  
Helena S. Schuch ◽  
Jason M. Armfield ◽  
Flavio F. Demarco
Keyword(s):  
Systematic Review ◽  
Data Extraction ◽  
Meta Analysis ◽  
Random Effect ◽  
Population Based ◽  
Dental Fear ◽  
Study Selection ◽  
Pooled Prevalence ◽  
Subgroup Analyses ◽  
Fear And Anxiety

ABSTRACTObjectivesTo systematically review the literature on the prevalence of dental fear in adults to estimate a worldwide pooled prevalence and to investigate factors related to the heterogeneity of estimates.MethodsInclusion criteria were population-based studies reporting the prevalence or data that allowed the calculation of prevalence of dental fear in adults and/or elders. Five electronic databases (Embase, PubMed, Scopus, Virtual Health Library (BVS) and Web of Science) were searched. Two researchers independently performed the study selection, data extraction and quality assessment of the included studies. The prevalence pooled estimates of dental fear were calculated using fixed- and random-effect models. Subgroup analyses were performed to investigate variability between studies.ResultsThe search strategy identified 4,486 studies. After removal of duplicates (1,722), title and abstract screening (2,764) and full-text reading (108), 31 publications were deemed eligible for this systematic review. A total of 72,577 individuals 18 years of age or older composed the sample of this systematic review. The global estimated prevalence of dental fear and anxiety (DFA), high DFA and severe DFA in adults were 13.8%, 11.2% and 2.6%, respectively. Subgroup analyses showed a higher prevalence of DFA, high DFA and severe DFA among women and younger adults. The instrument used to measure dental fear also affected the prevalence of the outcome.ConclusionsDental fear and high dental fear are prevalent in adults worldwide, being more prevalent among women.

scholarly journals Association betweenMnSODVal16Ala Polymorphism and Cancer Risk: Evidence from 33,098 Cases and 37,831 Controls

2018 ◽  
Vol 2018 ◽  
pp. 1-16 ◽  
Author(s):  
Ping Wang ◽  
Yanfeng Zhu ◽  
Shoumin Xi ◽  
Sanqiang Li ◽  
Yanle Zhang
Keyword(s):  
Cancer Risk ◽  
Manganese Superoxide Dismutase ◽  
Meta Analysis ◽  
Critical Role ◽  
Population Based ◽  
Knowledge Infrastructure ◽  
Manganese Superoxide ◽  
Increased Risk ◽  
Positive Report ◽  
Val16ala Polymorphism

Manganese superoxide dismutase (MnSOD) plays a critical role in the defense against reactive oxygen species. The association betweenMnSODVal16Ala polymorphism and cancer risk has been widely studied, but the results are contradictory. To obtain more precision on the association, we performed the current meta-analysis with 33,098 cases and 37,831 controls from 88 studies retrieved from PubMed, Embase, Chinese National Knowledge Infrastructure (CNKI), and Wanfang databases. Pooled odds ratios (ORs) and 95% confidence intervals (CIs) were used to assess the strength of association. We found that the polymorphism was associated with an increased overall cancer risk (homozygous:OR=1.09, 95% CI = 1.00–1.19; heterozygous:OR=1.07, 95% CI = 1.02–1.12; dominant:OR=1.08, 95% CI = 1.02–1.14; and allele comparison:OR=1.06, 95% CI = 1.02–1.11). Stratification analysis further showed an increased risk for prostate cancer, Asians, Caucasians, population-based studies, hospital-based studies, low quality and high quality studies. However, the increased risk forMnSODVal16Ala polymorphism among Asians needs further validation based on the false-positive report probability (FPRP) test. To summarize, this meta-analysis suggests that theMnSODVal16Ala polymorphism is associated with significantly increased cancer risk, which needs further validation in single large studies.

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