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  • 1 Semmelweis Egyetem, Általános Orvostudományi Kar II. Belgyógyászati Klinika Budapest Szentkirályi u. 46. 1088
  • 2 Magyar Tudományos Akadémia Molekuláris Medicina Kutatócsoport Budapest
  • 3 EGIS Nyrt. Budapest
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A vastagbél-biopszia általános mRNS-expressziós analízise segíthet a helyi kóros elváltozások molekuláris hátterének megismerésében, a gyulladásos és daganatos colonbiopsziák molekuláris mintázat alapján történő osztályozásához. Módszerek: Friss fagyasztott endoszkópos vastagbél-biopsziából teljes RNS kivonása és T7-módszerrel való amplifikációja történt. A génexpressziós mintázatot Atlas Glass 1K microarray-ken határoztuk meg. A microarray minőségi ellenőrzés után a következő minták adatai voltak értékelhetők: 10 colonadenoma, 6 vastagbélrák (CRC) és gyulladásos bélbetegség (IBD: 3 colitis ulcerosa és 3 Crohn-colitis). Többváltozós statisztikai és sejtfunkcionális elemzés történt. Az expressziós adatokat valós idejű RT-PCR-rel és immunhisztokémiával erősítettük meg. Eredmények: A kiválasztott gének diszkriminanciaanalízisével helyesen a 22 minta 4 paraméter alapján (hősokktranszkripciós faktor-1, bystin-szerű, kalgranulin-A, TRAIL receptor-3) osztályozható volt. A gyulladásos bélbetegségekben a kemokin ligand-13, a replikációs protein A1, az E74-szerű faktor-2 fokozott működése, és a TNF-receptor-asszociált faktor-6, a BCL2-interacting killer gének csökkent működése volt jellemző. Adenomában növekedett TNF-receptor-asszociált faktor-6, replikációs protein A1 és E74-szerű faktor-2, valamint csökkent BCL2-asszociált X protein és kalgranulin-A mRNS expresszió volt kimutatható. A vastagbélrákban szignifikánsan megnövekedett az epidermális növekedési faktor receptor, a topoizomeráz-1, a v-jun, a TNF-receptor-asszociált faktor-6 és a TRAIL receptor-3 expressziója, és csökkent a RAD51 és a RAD52 DNS-javítási gének, a protein-foszfatáz-2A és BCL2-interacting killer-mRNS szintje. Az eredményeket epidermális növekedési faktor RT-PCR, immunhisztokémia és topoizomeráz-1 RT-PCR is megerősítette. Következtetések: A biopsziás vastagbélminták objektív, génexpressziós mintázatokon alapuló osztályozása megvalósítható a cDNS microarray-vizsgálatok eredményeinek funkcionális és többváltozós elemzésével. Betegségspecifikus génexpressziós mintázatok megismerése segítséget nyújthat a nem egyértelmű szövettani diagnózis kiegészítésében, pontosításában.

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