The endothelial nitric oxide synthase (eNOS) encoded by the NOS3 gene is responsible for the
synthesis of a vasoactive endothelium-derived nitric oxide (NO). The genetic
polymorphism of this gene explains, in part, why some people are prone to
develop stroke than others. In this study we conducted a case control study in
Bahrainis to investigate “for the first time” the relationship between NOS3 894G> T (rs1799983) and 786T> C (rs2070744) polymorphisms with the stroke predisposition in Bahraini
population. Detection of NOS3
polymorphism was performed by PCR RFLP genotyping method. The level of NO among
cases and controls was measured using ELISA. A total of 93 unrelated stroke
patients and 86 controls were included in the study. The three types of stroke;
Ischemic, hemorrhagic and transient ischemic attack were reported (91.4%, 7.5%
and 1.1% respectively). No significant gender difference was observed (P = 0.74). Having previous stroke was a
highly significant risk factor of the disease (P = 0.001, OR = 1.4), where as a family history of stroke was not
(OR = 0.11). The analysis provides evidence that the mutant 894GT+ TT
genotypes of NOS3 894G> T polymorphism were positively associated with stroke predisposition and
it increased the risk of
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