Az Alzheimer-dementia progresszív neurodegeneratív betegség, amelynek progresszióját a jelenleg alkalmazott kezelések a betegség korai szakaszában lassíthatják. Vizsgálatainkkal olyan biológiai markereket kerestünk, amelyek érzékenyek a betegség prodromalis és korai szakaszában. A diagnosztikai rutinvizsgálatok mellett neuropszichológiai tesztet, auditoros kiváltottválasz-vizsgálatot és speciális laboratóriumi teszteket végeztünk Alzheimer-betegségben, vascularis dementiában, enyhe kognitív zavarban és depresszióban egészséges kontrollhoz hasonlítva. A párosított asszociációs tanulás mindegyik betegcsoportban kóros volt, depresszióban reverzíbilisnek látszott. Az auditoros kiváltott P300 komponens latenciája enyhe kognitív zavarban és dementiában megnőtt. A szérumban a paraoxonázaktivitás csökkent, az agy-gerincvelői folyadékban az Nε(γ-glutamil)lizin-izodipeptid koncentrációja emelkedett mindkét dementiacsoportban. Enyhe kognitív zavarban a párosított asszociációs tanulási teszt és a P300 jellegzetes változása az Alzheimer-dementia kialakulásának nagyobb kockázatát jelzi. A paraoxonázaktivitás és az izodipeptidkoncentráció változása érzékeny marker lehet a neurodegeneratív kórfolyamatok kimutatására. Az említett vizsgálatok együttes alkalmazása segítséget nyújthat az Alzheimer-dementia korai felismerésében és előrejelzésében.
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