Analysis of vascular endothelial growth factor (VEGF) insertion/deletion gene polymorphism and environmental risk factors in sample of Algerian population with neovascular age-related macular degeneration (nAMD).

Background: Increasing evidence shows that genetic and environmental factors can influence neovascular age-related macular degeneration (nAMD) risk. The aim of this study was first to analyse the association of insertion/deletion polymorphism in VEGF gene and environmental factors with the risk of nAMD, and then to investigate whether these factors have an impact on the age of onset of nAMD in a sample of the Algerian population.

Methods: Seventy two patients with nAMD and one hundred twenty-four controls were recruited; standardized questionnaire was used to collect information regarding underlying systemic diseases and important environmental factors.

Lack of association between genetic variants in the 19q13.32 region and CHD risk in the Algerian population: a population-based nested case-control study.

Background: Coronary Heart Disease (CHD) is a major cause of morbidity and mortality over the world; intermediate traits associated with CHD commonly studied can be influenced by a combination of genetic and environmental factors.

Objective: We found previously significant association between three genetic polymorphisms, and the lipid profile variations in the Algerian population. Considering these findings, we therefore decided to assess the relationships between these polymorphisms and CHD risk.

Associations of common SNPs in the SORT1, GCKR, LPL, APOA1, CETP, LDLR, APOE genes with lipid trait levels in an Algerian population sample.

Genome-wide association studies have identified many lipid-associated loci primarily in European and Asian populations. In view of the differences between ethnic groups in terms of the frequency and impact of these variants, our objective was to evaluate the relationships between eight lipid-associated variants (considered individually and in combination) and fasting serum triglyceride, total cholesterol, HDL- and LDL-cholesterol levels in an Algerian population sample (ISOR study, n = 751). Three SNPs (in SORT1, CETP and GCKR) were individually associated with lipid level variations.

Examination of the brain natriuretic peptide rs198389 single-nucleotide polymorphism on type 2 diabetes mellitus and related phenotypes in an Algerian population.

Background: In European populations, the NPPB rs198389 single nucleotide polymorphism (SNP) is associated with a reduced risk of type 2 diabetes mellitus (T2DM). We investigated the putative associations between NPPB rs198389, the T2DM risk and quantitative metabolic traits in an Algerian population.

Methods: The association analysis was performed as a T2DM case-control study (with 78 cases and 645 controls) nested into the ISOR population-based study.

The TCF7L2 rs7903146 polymorphism, dietary intakes and type 2 diabetes risk in an Algerian population.

Background: The transcription factor 7-like 2 (TCF7L2) gene is the most significant genetic risk factor for type 2 diabetes (T2D). Association analyses were performed on participants (n = 751, aged between 30 and 64) in the ISOR population-based study in the city of Oran. Dietary intakes were estimated using a weekly food frequency questionnaire.

Combined effect of established BMI loci on obesity-related traits in an Algerian population sample.

Background: Genome-wide association studies have identified variants associated with BMI in populations of European descent. We sought to establish whether genetic variants that are robustly associated with BMI could modulate anthropometric traits and the obesity risk in an Algerian population sample, the ISOR study.

Results: We found that each additional risk allele in the GPS was associated with an increment in the mean [95% CI] for BMI of 0.

Impact of APOE gene polymorphisms on the lipid profile in an Algerian population.

Background: The importance of apolipoprotein E (APOE) in lipid and lipoprotein metabolism is well established. However, the impact of APOE polymorphisms has never been investigated in an Algerian population. This study assessed, for the fist time, the relationships between three APOE polymorphisms (epsilon, rs439401, rs4420638) and plasma lipid concentrations in a general population sample from Algeria.

A study on the polymorphisms of the renin-angiotensin system pathway genes for their effect on blood pressure levels in males from Algeria.

Introduction: Several studies have assessed the relationship between blood pressure (BP) and polymorphisms within the genes encoding angiotensinogen (AGT), angiotensin II type 1 receptor (AT1R) and angiotensin-converting enzyme (ACE). However, considering the relatively large discrepancy in frequency and impact of these variants between ethnic groups and populations, still unavailable data from Algerian population are needed.

Objective: Our purpose is to evaluate the association between the AGT M235T, AT1R +1166A/C and ACE I/D polymorphisms and variations in systolic (SBP), diastolic (DBP) and pulse pressure (PP) values.

Association of ornithine transcarbamylase gene polymorphisms with hypertension and coronary artery vasomotion.

Background: Previous studies have suggested that the activity of enzymes involved in the urea cycle may modulate nitric oxide (NO) production, arterial vasomotion, and hypertension. Our aim was to determine whether hypertension and coronary vasomotion could be associated with polymorphisms within the ornithine transcarbamylase (OTC) gene, located on chromosome X and coding for a key-enzyme of the urea cycle.

Methods: Among 11 OTC polymorphisms that were originally selected from databases, the tag single-nucleotide polymorphism (SNP) rs5963409 and the independent SNP rs1800321 were tested for association with hypertension in two independent population samples recruited in Northern (Multinational MONItoring of trends and determinants in CArdiovascular disease (MONICA) study, n = 1,138) and Western (Etude du Vieillissement Artériel (EVA) study, n = 1,166) France.

Characterization of arginase 1 gene polymorphisms in the Algerian population and association with blood pressure.

Objectives: (i) To characterize the polymorphism of arginase 1 (ARG1), a new candidate gene in coronary heart disease (CHD), in the Algerian population; (ii) To evaluate the effect of common ARG1 single nucleotide polymorphisms (SNPs) on blood pressure (BP) values; and (iii) To compare the data with those previously obtained in French populations.

Methods: Eleven ARG1 SNPs selected from databases were characterized in a representative sample of 117 Algerian and 92 French males free of CHD. Relevant SNPs for association studies with BP were selected on the basis of their allele frequencies and pairwise linkage disequilibrium.