No evidence for association of the inducible nitric oxide synthase promoter polymorphism with Trypanosoma cruzi infection.
The purpose of the present study was to address the possible contribution of the (CCTTT)n microsatellite polymorphism in the NOS2 promoter region to the susceptibility to chronic Trypanosoma cruzi infection and to Chagas' disease related cardiomyopathy. We determined the (CCTTT)n genotypes in a sample of 76 serologically positive chagasic individuals and in 78 healthy controls. No statistically significant differences were observed between total chagasic patients and healthy controls with regard to frequency of the (CCTTT)n microsatellite repeat of any given length. Likewise, we found no differences in the distribution of the (CCTTT)n microsatellite repeats between seropositives without manifestations of the disease and those with chagasic cardiomyopathy. Our data suggest that the NOS2 promoter pentanucleotide microsatellite polymorphisms analyzed do not play a major role in the pathogenesis of chronic T. cruzi infection in this Peruvian sample.
Instituto de Parasitología y Biomedicina López-Neyra, CSIC, Granada, Spain.
J E
JE
Calzada
M A
MA
López-Nevot
Y
Y
Beraún
J
J
Martín
D000818:Animals; D014355:Chagas Disease / Q000235:genetics* / Q000378:metabolism; D004198:Disease Susceptibility; D006801:Humans; D018895:Microsatellite Repeats; D009569:Nitric Oxide / Q000378:metabolism; D019001:Nitric Oxide Synthase / Q000235:genetics* / Q000378:metabolism; D052247:Nitric Oxide Synthase Type II; D010568:Peru; D011110:Polymorphism, Genetic; D011401:Promoter Regions, Genetic / Q000235:genetics; D014349:Trypanosoma cruzi
D009569:Nitric Oxide; C496319:NOS2 protein, human; D019001:Nitric Oxide Synthase; D052247:Nitric Oxide Synthase Type II