pylori

infection and antiphospholipid syndrome, giant cell arteritis, systemic sclerosis, and primary biliary cirrhosis. Many researchers in the past have proposed an inverse relation between H. pylori infection and asthma. A meta-analysis found that asthmatic patients have a significantly lower prevalence of H. pylori infection than controls [31]. Even though, in some studies such as that of Wang et al. [32], the negative association is weak, and we know that the prevalence of H. pylori infection in patients with asthma does not increase [33]. Concerning the pathogenic mechanisms behind the supposed protective effect, Oertli et al. [34] clearly showed how H. pylori is able to stimulate selleck screening library the Th1 immune response, promoting persistent infection but conferring protection against asthma. Finally, Siva et al. [35] found a positive association between H. pylori infection, peptic ulcer, and chronic obstructive pulmonary disease, as described in the past by other authors. Magen et al. [36], in a retrospective study, reported that

chronic spontaneous urticaria may be triggered by H. pylori eradication, while El-Khalawany et al. [37], who studied 68 patients with rosacea and 54 controls, found that H. pylori infection played a significant role in rosacea patients who experienced dyspeptic symptoms, especially those with the papulopustular manifestations. Gallbladder cancer remains a rare gastrointestinal malignancy with a multifactorial pathophysiology. Helicobacter spp. gallbladder infection inducing local chronic inflammation SAHA HDAC in vivo and gallstone formation could be associated

with an increased risk of developing gallbladder cancer. Several studies published this year confirmed this hypothesis. In a meta-analysis including 10 studies published between 2002 and 2011, Zhou et al. explored the association between Helicobacter spp. (H. pylori, H. bilis, H. hepaticus, and H. ganmani) infection selleck chemicals llc and biliary tract cancer specimen analysis using PCR and immunohistochemistry on bile and biliary tissues. They suggested a trend toward a higher prevalence of Helicobacter spp. in patients with biliary tract cancers compared with normal controls or those with benign biliary diseases [38]. Mishra et al. [39] detected H. pylori DNA in 33% (18/54) of gallbladder cancer tissues associated with a significantly increased level of cytokines IL-1β and tumor necrosis factor (TNF)-α compared to H. pylori-negative tissue specimen. Alexander et al. conducted a retrospective population-based study to evaluate trends in the incidence and treatment of gallbladder cancer in the past three decades in the south of the Netherlands. During this time period, the age-standardized incidence of gallbladder cancer declined drastically, probably because of an increasing number of early cholecystectomies for gallstones, but also perhaps because of the effective treatment of H. pylori which also paralleled the decreasing incidence of stomach cancer [40].