Risk Factors Associated with Mild Cognitive Impairment аmong Apparently Healthy People and the Role of MicroRNAs

BACKGROUND: Mild cognitive impairment (MCI) is a stage between the expected cognitive decline of normal ageing and the serious decline of dementia. AIM: To identify risk factors and role of miRNAs associated with mild cognitive impairment (MCI) among employees. SUBJECTS AND METHOD: A cross-sectional study was carried out on 186 employees aged between 40 and 65 years. Cognitive function was evaluated using ACEIII, MoCA, and Quick cognitive tests. Medical history and lifestyle were assessed. Family 132 & 134 miRNA expressions were assessed by real-time PCR. RESULTS: MCI was detected among 14 / 186 (7.5%). miRNA 132 expression was the only significant miRNAs to detect MCI with low sensitivity and specificity (70%). The logistic analysis revealed that higher miRNA132 expressions, low monthly intake of; vegetables, unroasted nuts, low education and higher ALT levels were predicting factors for MCI with AOR 1.1 (1.01-3.3), 1.2 (1.04-1.43), 0.8 (0.8-0.98), 2.7 (1.9-7.4) and 1.6 (1.1-2.3) respectively. CONCLUSION: MiRNAs expression showed low sensitivity and specificity in detecting MCI; only miRNA 132 might be used. Several modifiable factors seem to reduce the risk of MCI

GLUL rs10911021 polymorphism and risk of coronary artery disease among Egyptian individuals

Abstract Background Genome-wide association studies have identified novel genes related to coronary artery disease (CAD). These studies have been replicated in distinct ethnic populations, returning inconsistent results. Our work aimed to study the frequency of C and T alleles of GLUL polymorphism genetic variant rs10911021 among Egyptians with coronary artery disease in comparison to apparently healthy subjects. Our study included 420 patients with CAD (180 CAD without T2DM, 240 CAD with T2DM patients) and 200 control subjects. All subjects were genotyped for rs10911021 by real-time polymerase chain reaction. Results For rs10911021, the frequency of (C/T + T/T) genotypes was significantly higher in CAD patients with and without T2DM than in controls (55(45 + 10) % vs. 22(19 + 3) %; p < 0.001) and (50(45 + 5) % vs. 22(19 + 3) %; p < 0.001 respectively). The genotype C/C was the most frequent among the controls (78%). The presence of GLUL polymorphism was associated with 4.4-fold increased risk to develop CAD in diabetic patients (OR = 4.4, 95% CI = (2.2–8.7); p < 0.001) and was associated with 2.3-fold increased risk to develop CAD (OR = 2.3, 95% CI = (1.1–4.6); p = 0.0213). Conclusion In conclusion, among Egyptians, the GLUL polymorphism susceptibility variant rs10911021 is associated with CAD, with and without T2DM

Peroxisome proliferator-activated receptor-γ polymorphism (rs1801282) is associated with obesity in Egyptian patients with coronary artery disease and type 2 diabetes mellitus

Objective: Peroxisome Proliferator-Activated Receptor-γ (PPAR-γ) gene is one of the possible genes linking diabetes mellitus (DM) with coronary artery disease (CAD). The aim of this study is to clarify whether PPAR-γ Pro12Ala polymorphism is associated with the development of CAD in type 2 diabetic patients and to evaluate PPAR-γ Pro12Ala polymorphism genetic distribution in type 2 DM (T2DM) Egyptian subjects. Methods: PPAR-γ Pro12Ala polymorphism was determined by Real-Time PCR in serum of 405 subjects classified into 4 groups; T2DM patients (n = 105), T2DM with CAD (n = 100), CAD patients (n = 100) and healthy controls (n = 100). Results: The PPAR-γ Pro12Ala polymorphism was associated significantly with T2DM with CAD (group2) (OR = 3, 95% CI = (1.5–6); p = 0.001). In this study, T2DM with CAD complications carrying the PPAR-γ Pro12Ala polymorphism had higher BMI than those without the PPAR-γ Pro12Ala polymorphism (p < 0.0001). CAD patients carrying PPAR-γ Pro12Ala polymorphism had considerable insulin resistance features. Plasma paraoxanase 1(PON1) level was considerably reduced among our 3 studied groups in comparison to control group (p < 0.001). Conclusions: PPAR-γ Pro12Ala polymorphism might represent a novel risk factor for CAD in T2DM

Expression of JAZF1, ABCC8, KCNJ11and Notch2 genes and vitamin D receptor polymorphisms in type 2 diabetes, and their association with microvascular complications

Background: We studied JAZF1, ABCC8, KCNJ11and Notch2 gene expression and vitamin D receptor (VDR) polymorphisms (Fok1 and Bsm1) in patients with type 2 diabetes mellitus (T2DM) and tried to find out their association with microvascular complications in these patients. Methods: The study was conducted on 180 patients (93 complicated and 87 noncomplicated) and 150 healthy subjects. Reverse-transcriptase polymerase chain reaction (RT-PCR) was used to assess gene expression and real-time PCR was used to detect VDR genotypes. Serum vitamin D was assessed using Elisa technique. Results: After adjustment for age, sex, body mass index and glycated hemoglobin, altered Notch2 gene expression was found between patients and controls and between complicated and noncomplicated cases ( p = 0.001 and 0.001, respectively) and ABCC8 gene expression showed significant difference between patients and controls only ( p = 0.003), while JAZF1and KCNJ11 expression showed no significant difference between the studied groups ( p = 0.3 and 0.4, respectively). Serum vitamin D level was decreased in patients compared with controls ( p = 0.001), while no difference was detected between complicated and noncomplicated cases ( p = 0.1). Our results revealed no significant difference in VDR Fok1 and Bsm1 genotype distributions ( p = 0.7 and 0.1, respectively) and allele frequencies ( p = 0.4 and 0.1, respectively) between patients and controls. Patients with complications showed increased frequencies of Fok1GG genotype and G allele, while patients without complications showed increased frequencies of AA, then AG Fok1 genotype and A allele ( p = 0.001 and 0.001, respectively). In addition, the frequencies of CC Bsm1 genotype and C allele were significantly higher among patients with complications, while frequencies of TT Bsm1 genotype and T allele were significantly higher among patients without complications ( p = 0.02 and 0.003, respectively). Conclusion: Altered expression of Notch2 and ABCC8 genes may play a role in the pathogenesis of T2DM. Altered expression of Notch2 and VDR polymorphisms may play a role in the development of microvascular complications in diabetic patients. These results may assist in early identification and management of diabetic complications

Plasma microRNAs biomarkers in mild cognitive impairment among patients with type 2 diabetes mellitus.

ObjectivesTo assess the potential value of some miRNAs as diagnostic biomarkers for mild cognitive impairment (MCI) among patients with type2 diabetes mellitus (T2DM) and to identify other risk factors for MCI among them.MethodsThis study enrolled 163 adults with T2DM using face to face interview. Cognitive function with its domains was assessed using Adenbrooke's Cognitive Examination III (ACE III). Lipid profile, glycated hemoglobin, and miR-128, miR-132, miR- 874, miR-134, miR-323, and miR-382 expressions, using quantitative real-time PCR, were assessed.ResultsMCI was detected among 59/163 (36.2%) patients with T2DM. Plasma expression of miR-132 was significantly higher in T2DM patients with MCI compared to those without MCI and to normal cognitive healthy individuals (median = 2, 1.1 and 1.2 respectively, P ConclusionMCI affects nearly one-third of adult patients with T2DM. A significantly over expression of miR-132 was detected among T2DM with MCI compared to those with normal cognition

Correction: Plasma microRNAs biomarkers in mild cognitive impairment among patients with type 2 diabetes mellitus.

[This corrects the article DOI: 10.1371/journal.pone.0236453.]