[Apolipoprotein E polymorphism and cerebral stroke]. / Polymorphisme de l'apolipoprotéine E et les accidents vasculaires cérébraux.

UNLABELLED: Our study is the type case-control realized at the Hospital of Constantine, discusses the relationship between polymorphism of apolipoprotein E and stroke. METHODS: The determination of the polymorphism of apolipoprotein E was carried out by PCR- digestion (polymerase chain reaction) using the enzyme of restriction HhaI. The study population consisted of 218 Algerian patients with stroke (divided into 63% ischemic and 37% hemorrhagic), and 509 control subjects. RESULTS: Three isoforms of apolipoprotéin E have been identified. The allelic distribution of apo E in the general population showed a predominance of the allele ɛ3 (84.3%) followed distantly by allele ɛ4 (10.7%) and ɛ2 (5%) respectively. ɛ3/ɛ4 genotype was significantly more represented among subjects with ischemic stroke (29.5%) compared with control subjects (18.8%). The odds ratio is 1.72 compared to carriers of the genotype ɛ3/ɛ3 (CI is 95% and p <0.05). CONCLUSIONS: The distribution of allelic frequencies of apolipoprotein E in the population of Constantine is similar to that of Southern Europe. Our results imply a role of the genotype of apolipoprotein E (ɛ4 allele) in the pathogenesis of stroke and are limited to the accidents of the ischemic type. The ɛ2 allele does not appear to be implied in occurred of this affection; however, large additional studies are necessary to confirm this result.

Influence of methylenetetrahydrofolate reductase C677T gene polymorphisms in Algerian infertile men with azoospermia or severe oligozoospermia.

AIMS: The C677T allele of the methylenetetrahydrofolate reductase (MTHFR) gene has been suggested to represent a risk factor for male infertility. To confirm this association, the distribution of the single-nucleotide polymorphism C677T was investigated in idiopathic infertile Algerian patients with nonobstructive azoospermia (NOA) or severe oligoasthenoteratozoospermia (OAT). A case-control study was carried out, including 74 idiopathic infertile Algerian patients with NOA (n=46) or severe OAT (n=28) and 84 fertile men as controls. Polymorphism C677T was studied by polymerase chain reaction-restriction fragment length polymorphism, and the results were statistically analyzed. RESULTS: The frequency of genotypes MTHFR 677CC, 677CT, and 677TT in idiopathic infertile men with NOA was 43.48%, 41.30%, and 15.22%; 39.29%, 50%, and 10.71% regarding the severe oligozoospermic men; and 42.86%, 45.24%, and 11.90% in the control group. CONCLUSIONS: The data suggest that the C677T MTHFR polymorphism is not a risk factor for idiopathic male subfertility in an Algerian population.