Detection and genotypisation of Helicobacter pylori strains in Waldeyers lymphatic tissue and its relationship to the formation of pathologies in this area

The aim ofthis study was to reveal the presence ofHelicobacter pylori (HP) in the Waldeyers lymphatic tissue in the group ofchildren and adults, along with its possible role in the etiology of tonsillar carcinoma and benign diseases (chronic tonsillitis, OSAS, adenoids). In our study we have confirmed the hypothesis that HP is presented m the Waldeyers lymphatic tissue. as well as in the stomach and that the oropharynx and epipharynx are the an extragastric reservoir ofHP. Mucosa associated lymphatic tissue in the stomach is similar to lymphatic tissue ofWaldeyer ring. These conditions can be very favourable for the survival ofHP and thus can promote inflammation changes and immune changes as well as in the stomach. ln our study, using the real-time PCR method we have detected high incidence ofHP DNA in adenoids and tonsillar tissue. ln the group ofbenign diseases, the most frequent genotypes were CagA­ VacAsIbm1 and CagA-VacAslbm2. In the group of patients with tonsillar carcinoma, the most frequent genotype was CagA-VacAslbml. Genotyping identified strains ofHP showed differences in comparison with the predominant strains which are most frequently found in the stomach. Genotypic analysis ofI-IP strains showed that the less prevalent virulent strains ofHP, known as cagA negative and vacA positive....Práce se zabývá studiem přítomnosti Helicobacler pylori (HP) v lymfatické tkáni Waldeyerova okruhu u skupiny dospělých a dětských pacientů a možnou souvislostí se vznikem benigních onemocnění v této oblasti ( chronická tonzilitida, adenoidní vegetace a OSAS) a se vznikem karcinomu tonzily. V naší práci jsme potvrdili hypotézu, že HP se nachází v lymfatické tkání Waldeyerova okruhu stejně tak jako v žaludku a lymfatická tkáň oropharyngu a epipharyngu tak plní roli extragastrického zdroje HP. Předpokládá se, že v lymfatické tkání Waldeyerova okruhu působí infekce HP podobnými imunitními a zánětlivými procesy jako v žaludku, neboť se jedná o lymfatickou tkáň vázanou na sliznici. V dizertační práci jsme pomocí metody real-time PCR zjistili vysoký výskyt DNA HP v adenoidní a tonzilámí tkáni. Ve skupině benigních onemocnění byly nejčastěji detekovány genotypy Cag-VacAslbml a CagA-VacAslbm2. Ve skupině pacientů s karcinomem tonzily byl nejčastěji detekován genotyp CagA- VacAslbml. Genotypizací zjištěné kmeny HP vykazovaly rozdíly v porovnání s převládajícimi kmeny, které lze nejčastěji nalézt v žaludku. Prokázané kmeny se liší především menší expresí CagA genu. Byly tak detekovány mé1iě virulentní kmeny. Předpokládá se, že dlouhodobá kolonizace lymfatické tkáně orofaryngu a epipharyngu méně virulentními...Klinika otorhinolaryngologie a chirurgie hlavy a krku 1. LF UK a FN v MotoleDepartment of Otorhinolaryngology, Head and Neck Surgery First Faculty of MedicineFirst Faculty of Medicine1. lékařská fakult

Detection and genotypisation of Helicobacter pylori strains in Waldeyers lymphatic tissue and its relationship to the formation of pathologies in this area

The aim ofthis study was to reveal the presence ofHelicobacter pylori (HP) in the Waldeyers lymphatic tissue in the group ofchildren and adults, along with its possible role in the etiology of tonsillar carcinoma and benign diseases (chronic tonsillitis, OSAS, adenoids). In our study we have confirmed the hypothesis that HP is presented m the Waldeyers lymphatic tissue. as well as in the stomach and that the oropharynx and epipharynx are the an extragastric reservoir ofHP. Mucosa associated lymphatic tissue in the stomach is similar to lymphatic tissue ofWaldeyer ring. These conditions can be very favourable for the survival ofHP and thus can promote inflammation changes and immune changes as well as in the stomach. ln our study, using the real-time PCR method we have detected high incidence ofHP DNA in adenoids and tonsillar tissue. ln the group ofbenign diseases, the most frequent genotypes were CagA­ VacAsIbm1 and CagA-VacAslbm2. In the group of patients with tonsillar carcinoma, the most frequent genotype was CagA-VacAslbml. Genotyping identified strains ofHP showed differences in comparison with the predominant strains which are most frequently found in the stomach. Genotypic analysis ofI-IP strains showed that the less prevalent virulent strains ofHP, known as cagA negative and vacA positive...