study of Helicobacter pylori duodenal ulcer promoting gene [cfupA] polymorphisms in Iraq and Turkey and their role in IL-12 secretion

The duodenal ulcer promoting gene [dupA] has been identified recently and was found to associate with duodenal ulceration in some populations and gastric cancer in others. It was also found that this gene is polymorphic and dupAl [but not dupAZ] substantially increased H. pylori-induced IL-12 production from mononuclear cells. The aims of this paper were to determine the prevalence ofdupA polymorphisms in Iraq and Turkey and their effect on major cytokine secretion from peripheral blood mononuclear cells [PBMCs]. We studied a total of 85 H. pylon strains: 42 [non-ulcer disease [MUD]: 26; duodenal ulcer [DU]: 13; gastric ulcer [GU]: 3; gastric cancer [GC]: 0] which were isolated from Iraq and 43 [NUD: 28; DU: 12; GU: 2; GC: 1] from Turkey. dupA was PCR amplified then polymorphisms were studied by sequencing 10 and 9 dupA+ Iraqi and Turkish strains, respectively. It was found that none of the Iraqi strains and [22%] of Turkish strains typed as dupA1. Finally, 2 dupA1, 4 dupA2 and 2 dupA-negative strains were assessed for their ability to induce IL-12, IL-10 and IL-8 in PBMCs. The IL-12 response of PBMCs cultured for 48 hours with wild-type strains carrying the dupAl was significantly higher [strain: mean +/- sd pg/ml, WTD1A:416 +/- 22.8; WTD1B:405.9 +/- 22.4] than those induced by wild-type H. pylori carrying the dupA2 [WTD2A:290.7 +/- 16.3; WTD2B:252.5 +/- 5; WTD2C:262.1 +/- 14; WTD2D:279.5 +/- 17; p<0.02 for all] and than those typed dupA-negative [WTD-veA:258.5 +/- 12; WTD-veB:225.6 +/- 32; p<0.02 for all] . Regarding IL-8 and IL-10, we found no significant differences between dupAl and others. These data suggested that dupAl is rare in these two countries and dupAl plays an important role in IL-12 secretion from PBMCs. More research is needed to determine the functionality ofdupA and its relationship with disease

Does regular garlic intake affect the prevelance of helicobacter pylori in asymptomatic subjects?

The in vitro antibacterial activity of garlic against Helicobacter pylori [H.pylori] is well documented and the potential for its use in vivo was suggested. Garlic intake, a traditional habit by the Taskopru population in Turkey for decades, was examined for its effect on the prevalence of H. pylori and compared with the non garlic consuming group. Eighty-one garlic consuming asymptomatic subjects in Kastamonu province in Turkey [68 males, 13 females] of 23-82 years of age [average 46] were selected on a very restricted bases in regards to the garlic intake [raw or cooked, or both], amount, duration and other criteria. Control group [non-garlic consuming] of 81 asymptomatic subjects [66 males, 15 females] of 23-90 years of age [average 43] were enrolled for comparison with the garlic consuming group. Serum samples were collected from both groups during the period from September 2001 through to April 2002 and examined by the enzyme linked immunoassay test for anti H.pylori antibodies. An overall H.pylori prevalence of 79% and 81% was detected in the garlic and non garlic consuming groups. A significantly lower average antibody titer was detected in the garlic consuming group than that of the control group and similarly in those who consumed mixture of raw plus cooked garlic as compared to those who consumed raw or cooked garlic alone. Garlic intake for long durations [years] did not appear to have an effect on the prevalence of H.pylori infection. Garlic consuming subjects had a significantly lower average antibody titer than non garlic consuming groups, which might suggest an indirect inhibitory effect on the reproduction of H.pylori and possibly progression to more serious peptic ulcer diseases