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  • 1 Semmelweis Egyetem, Általános Orvostudományi Kar, Budapest, Üllői út 78., 1082
  • 2 Semmelweis Egyetem, Általános Orvostudományi Kar, Budapest
  • 3 Egyesített Szt, István és Szt. László Kórház. Budapest
  • 4 Fővárosi Önkormányzat Uzsoki Utcai Kórház, Budapest
Open access

Absztrakt

Bevezetés: A vastagbéldaganatokra jellemző genetikai instabilitás megnyilvánulhat több úton: kromoszomális instabilitás, mikroszatellita-instabilitás, illetve „CpG-island methylator phenotype”. Ezek pontosabb karakterizálásával a rendelkezésre álló kezelések elviekben optimalizálhatók lehetnek. Célkitűzés: A szerzők a mikroszatellita-instabilitás előfordulását, heterogenitását, prognosztikus és prediktív potenciálját vizsgálták 122 primer colontumor szisztematikusan szelektált régióiban és 69 párosított májmetasztázisban. Módszer: Szöveti multiblokkok kialakítása után az MLH1, MSH2, MSH6 és PMS2 kifejeződését vizsgálták immunhisztokémiai módszerrel. Eredmények: A betegek 11,5%-a (14/122) rendelkezett mikroszatellita-instabil fenotípusú daganattal. A különböző tumorrégiók fehérjekifejeződésében nem volt jelentős különbség. A primer tumor–májmetasztázis párok esetében 20,2%-ban a kettő más mismatch repair státusba volt sorolható. A relapsusmentes és teljes túlélést tekintve a mismatch repair státus nem volt prognosztikus. Az 5-fluorouracil-, oxaliplatin-, irinotecan-, bevacizumab-, cetuximab-, panitumumabterápia hatékonyságát tekintve mismatch repair státus nem volt prediktív a progressziómentes és teljes túlélés adatai alapján. Következtetések: A prognosztikus faktorok pontosabb meghatározása nagyobb esetszámú, pontosan szelektált vizsgálat keretében hatékonyabbá teheti a kezelés megválasztását. Orv. Hetil., 2015, 156(36), 1460–1471.

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