ABO blood groups and Helicobacter pylori cagA infection: evidence of an association
Mattos, D. E; Cintra, J. R; Brandão de Mattos, C. C; Nakashima, F; Silva, R. C. M. A; Moreira, H. W; Mattos, L. C de.
J. venom. anim. toxins incl. trop. dis
; 16(1): 87-95, 2010. tab
Artigo
em Inglês
| LILACS | ID: lil-542431
Diseases resulting from Helicobacter pylori infection appear to be dependent on a host of genetic traits and virulence factors possessed by this microorganism. This paper aimed to investigate the association between the ABO histo-blood groups and H. pylori cagA infections. Genomic DNA samples (n = 110) of gastric biopsies obtained from patients with endoscopic diagnosis of peptic ulcers (n = 25) and chronic active gastritis (n = 85) were analyzed by PCR using specific primers for the cagA gene. Of the samples, 66.4 percent (n = 73) tested positive and 33.6 percent (n = 37) negative for the gene. The cagA strain was predominant in peptic ulcers (n = 21; 84.0 percent) compared with chronic active gastritis (n = 52; 61.2 percent) (p = 0.05; OR 3.332; 95 percent CI 1.050-10.576). Additionally, the cagA strain was prevalent in the type O blood (48/63; 76.2 percent) compared with other ABO phenotypes (25/47; 53.2 percent) (p = 0.01; OR 2.816; 95 percent CI 1.246-6.364). These results suggest that H. pylori cagA infection is associated with the O blood group in Brazilian patients suffering from chronic active gastritis and peptic ulcers.
Biblioteca responsável:
BR33.1
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