Human agt-p.Met268thr and coronary heart disease risk: A case-control study and meta-analysis

Summary Background. Polymorphisms in genes, which is involved in the renin–angiotensin system, play an important role in the pathogenesis of coronary heart disease (CHD). Polymorphism of c.803T>C in the human angiotensinogen gene results in methionine (M) to threonine (T) substitution at codon 268 (p.Met268Thr), which traditionally has been known as M235T. This polymorphism may contribute to cardiovascular diseases. Objectives. The aim of this study was to investigate the association between p.Met268Thr polymorphism in the angiotensinogen gene and coronary heart disease (CHD) through a case-control study, which is followed by a meta-analysis. Material and methods. In the case-control study, c.803T>C genotyping of 217 subjects (102 CHD cases vs 115 controls) was investigated by the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method. In the meta-analysis, 31 studies were included, reflecting 12,028 people with CHD and 16,362 healthy controls. Results. The data from the case-control study revealed that MT (OR, 1.875; 95%CI, 1.060–3.316; p = 0.031) and TT (OR, 3.389; 95%CI, 1.251–9.179; p = 0.016) genotypes are significantly associated with CHD. The meta-analysis revealed a significant association in the recessive model (OR, 1.156; 95%CI, 1.011–1.321; p = 0.034). Conclusions. Although the pooled OR of the meta-analysis showed that there is an increased risk of CHD conferred by p.Met268Thr of the AGT gene, this association was weak, which could be attributed to a bias in publications. © Copyright by Wydawnictwo Continuo

Investigating possible effects of aryl hydrocarbon receptor G1661A polymorphism on asthma severity in adults

311-319Aryl hydrocarbon Receptor (AhR) is a ligand-activated transcription factor with an important role in lung health. The association of AhR polymorphisms with asthma severity has not been yet investigated. We analyzed the association of G1661A, the most prevalent polymorphism of AhR, with the asthma stages in a population-based study including 555 asthmatics (Intermittent: 93, Mild: 240, Moderate: 158, and Severe: 64). The SNP was genotyped using allele-specific PCR. Obtained data were analyzed using the Generalized-Ordered Logit Estimates. Genotypes GA (OR: 0.53, CI: 0.32-0.90, P=0.019) and AA (OR: 0.22, CI: 0.06-0.76, P=0.017) were associated with decreased risk of Severe, Moderate, Mild vs. Intermittent stage; and Severe, Moderate, vs. Mild, Intermittent stages respectively. However, Genotype GA (OR: 1.90, CI: 1.05-3.44, P=0.033), dominant model GA+AA (OR: 2.04, CI: 1.17-3.57, P=0.012), and allele A (OR: 1.68, CI: 1.06-2.66, P=0.027) were associated with increased risk of Severe stage vs. Moderate, Mild, Intermittent stages. Also, male sex and higher age were associated with an increased odds ratio for severe asthma. Furthermore, significant associations with asthma stages were found for the interactions of the SNP and sex, smoking, and alcohol consumption. In conclusion, we revealed that the mutant allele of AhR-G1661A may interact with independent variables and act as a protective factor against lower stages of asthma but it may increase the risk of severe asthma

Association of the Toll-like receptor 4 and NOX4 gene and protein levels in asthmatic patients with metabolic syndrome: A case–control study

Background: Understanding the contributing of influence inflammatory biomarkers in asthmatic patients with metabolic syndrome is more important. Whereby, the present study considering the important association of NADPH oxidase4 (NOX4) and Toll- like receptor4 (TLR4) in the respiratory inflammatory responses in asthmatic patients with metabolic syndrome (AS-MetS) and asthmatic (AS) patients. Materials and Methods: In this case-control study, 30 AS and 34 AS-MetS patients were enrolled. The Peripheral blood mononuclear cells (PBMCs) mRNA and protein levels of TLR4 and NOX4 were measured by qRT-PCR and western blot, respectively. Then their correlation was evaluated. Results: The significant down-regulation of mRNA and protein PBMCs expression levels of TLR4 were observed in the AS-MetS group in comparison to AS one (P=0.03), but the NOX4 expression was non-significant. Additionally, the significant correlation was exhibited between mRNA expression levels of NOX4 and TLR4 in both AS-MetS (r= 0.440, P=0.009) and AS groups (r=0.909, P=0.0001). The association between TLR4 mRNA level and triglyceride in AS-MetS group (r=0.454, P=0.008,) and also white blood cells (WBC) in AS group (r= -0.507, P=0.006,) were significant. Conclusion: The metabolic syndrome can significantly influence the expressions of TLR4 in AS-MetS. This study indicated that TLR4 and NOX4 altogether may provide valuable molecular knowledge of their relation with metabolic syndrome criteria for finding major pathways in different phenotype of asthma

Nutritional supplements for people being treated for active tuberculosis

Background Tuberculosis is a serious infection affecting mainly the lungs. It may contribute to nutritional deficiencies which in turn may delay recovery by depressing immune functions. Nutritional supplements might therefore promote recovery in people being treated for tuberculosis. Objectives To assess the provision of oral nutritional supplements to promote the recovery of people being treated with antituberculous drug therapy for active tuberculosis. Search strategy We searched the Cochrane Infectious Disease Group Specialized Register (June 2008), CENTRAL (The Cochrane Library 2008, Issue 2), MEDLINE (June 2008), EMBASE (June 2008), LILACS (June 2008), mRCT (June 2008), the Indian Journal of Tuberculosis (1983 to June 2008), and checked the reference lists of all included studies. Selection criteria Randomized controlled trials comparing any oral nutritional supplement given for at least four weeks with no nutritional intervention, placebo, or dietary advice only for people being treated for active tuberculosis. Data collection and analysis Two authors independently selected trials, extracted data, and assessed risk of bias. We calculated risk ratios (RR) for dichotomous variables and mean differences ( MD) for continuous variables, with 95% confidence intervals (CI). We pooled data from trials with similar interventions and outcomes. Main results Twelve trials ( 3393 participants) were included. Five trials had adequate allocation concealment. Interventions included a high energy supplement, high cholesterol diet, vitamin D, vitamin A, zinc, arginine, multiple micronutrient supplements, combined multiple micronutrient supplements and zinc, combined vitamin A and zinc, and combined vitamin A and selenium. The following supplements were associated with increased body weight at follow up: high energy supplements (MD 1.73 kg, 95% CI 0.81 to 2.65; 34 participants, 1 trial); multiple micronutrients plus additional zinc (MD 2.37 kg, 95% CI 2.21 to 2.53; 192 participants, 1 trial); and vitamin A plus zinc (MD 3.10 kg, 95% CI 0.74 to 5.46; 80 participants, 1 trial). There was no evidence that any supplement affected the number of deaths or number of participants with sputum test positive results at the end of treatment. Authors' conclusions There is limited evidence that high energy supplements and some combinations of zinc with other micronutrients may help people with tuberculosis to gain weight. There is not enough evidence to assess the effect of other combinations of nutrients. A number of relevant trials are in progress, and, where appropriate, the results will be incorporated into future updates of this review

MicroRNA-Based Biomarkers in Lung Cancer: Recent Advances and Potential Applications

Introduction: MicroRNAs (miRNAs) are a group of small noncoding RNAs (ncRNAs) that post-transcriptionally control the expression of genes by binding and degrading their target mRNAs. miRNAs can function as possible tumor suppressors or oncogenes in various cancers. Lately, miRNAs application as a biomarker (prognosis and diagnosis) for different diseases has gained much attention. miRNAs exist in a stable form in several biological materials, including tissue, plasma, and serum. The noninvasive and easy screening of miRNAs in serum, blood, tissue, and other body fluids and acceptable stability make microRNA a noticeable factor as biomarkers in human malignancies. Materials and Methods: In this review, we searched some online databases like Web of Science, Embase, and PubMed to find eligible manuscripts up to the end of 2021. Results: Abnormal expressions of these molecules are associated with the incidence of many illnesses like cancer. Therefore, they are candidates as a molecular tool for noninvasive tumor prognosis and diagnosis. In the current study, we introduce important miRNAs that may be used as prognostic and diagnostic markers in lung cancer patients. Conclusion: We summarized the latest reports about critical miRNAs related to the diagnosis and prognosis in lung patients. © 2023 Bentham Science Publishers.This study was supported by the Tuberculosis and Lung Diseases Research Center, Tabriz University of Medical Science, Tabriz, Iran

Sex-specific association of exposure to air pollutants and Nrf2 gene expression and inflammatory biomarkers in exhaled breath of healthy adolescents

Studies investigating the nuclear factor erythroid 2-related factor 2 (Nrf2) expression levels in the respiratory system of healthy subjects are scarce. Moreover, separate studies on the health-related outcomes of air pollution for each sex are limited. The current panel study investigated sex-specific Nrf2 expression levels and related oxidative stress and inflammatory responses among healthy adolescents exposed to PM2.5, PM10, O3, and PM2.5-bounded metals in a high traffic region. Forty-nine healthy nonsmoking subjects participated in the study for five consecutive months (Nov. 2019 to Feb. 2020). Each subject was asked to provide 1 mL of exhaled breath condensate (EBC). Data were analyzed using linear mixed-effects models. The results showed that PM10, PM2.5, O3, and PM2.5-bounded metals were negatively linked to Nrf2 expression level in EBC of females with −58.3% (95% CI: 79.5, −15.4), −32.1% (95% CI: −50.3, −7.1), −76.2% (95% CI: −92.6, −23.9), and −1.9 (95% CI: −3.4, −0.4), respectively. While our results presented no significant association between the studied pollutants and Nrf2 gene expression in males, significant associations were observed between the pollutants and total nitric oxide (NOx), interleukins 6 (IL-6), and tumor necrosis factor-alpha (TNF-α) in the EBC of females. In the case of males, only EBC cytokines showed a significant association with air pollutants. Overall, this study suggests that exposure to ambient air pollutants may affect the respiratory system with biologically different mechanisms in males and females. PM2.5 concentration had a positive correlation with exhaled TNF-α and IL6 values in females while positive correlation with TNF-α and negative correlation with IL6 values in males. O3 had a negative correlation with TNF-α in males. © 2023 Elsevier LtdThis work was supported by the National Institute for Medical Research Development (No. 972630 ) in Iran. This is a report on database research from a PhD thesis registered in Tabriz University of Medical Sciences as Number 60644. All authors warmly appreciate the contributions of the school office managers, the students, and their families' patience during case selection and study follow-up in this research.National Institute for Medical Research Development, NIMAD: 97263

Terminalia Catappa Extract (TCE) Reduces Proliferation Of Lung And Breast Cancer Cell By Modulating miR-21 And miR-34a Expressions

After cardiovascular illness, cancer is the one of the main and second cause of death in the worldwide. Despite significant advances in this field, low survival, drug resistance, and side effects of chemotherapy remain an unsolved problem. Due to the high mortality rate among cancer patients, finding the new substance to treatment with low side effects is important. Previous studies have been informed that positive effects of herbal medicines on cancer patients, which are very efficient in the treatment of cancer. Methods: In this study, the antitumor effect of ethanolic Terminalia catappa leaf extract (TCE) on MCF-7, MDA-231, and A549 cell lines was examined. For this reason, the effects of TCE on cell migration, gene expression, and growth were investigated by scratch, test, real-time PCR (qPCR) qPCR, and MTT tests respectively. Results: As a reported by the MTT outcomes, TCE significantly decreased the viability of A549, MCF-7, and MDA-231 cells (P < 0.05). Moreover, genes expression patterns that are related to proliferation (miR-21, miR-34a), migration (MMP-13, Vimentin), and apoptosis (Cas-3, Cas-8, Cas-9, Bcl-2, Bax) also have changed significantly after treatment with TCE. Also, in the A549 cell line, Bax (p value: 0.029), Cas-9 (p value: 0.00023), miR-34a (p value: 0.031), Bcl-2 (p value: 0.0076), MMP-13 (p value: 0.041), Cas-3 (p value: 0.00051) and in MCF-7 cell line Bax (p value: 0.0004), Cas-3 (p value: 0.0003), Cas-9(p value: 0.037), miR-34a (p value: 0.005), Bcl-2(pvalue:0.0007), mir-21(p value:0.016), MMP-13(p value: 0.011) and in MDA-231 cell line Bax(p value<0.0001), Cas-3(p value: 0.003), Cas-9(p value: 0.0004). mir-34a (p value:0.0019), Bcl-2(p value:0.0023), MMP-13(p value: 0.032) have significantly changed compare to control group. Conclusion: The outcomes of this research determined that T. Catappa might be a potential source of antitumor compounds and could be a candidate for further research. © 2021. All Rights Reserved.This study was supported by a grant from research deputy of Department of Tuberculosis and Lung Diseases Research Center, University Tabriz University of Medical Sciences, Tabriz, Iran