A gyógyszermellékhatások felismerése és a tüneteket kiváltó gyógyszer oki szerepének bizonyítása komoly felkészültséget igényel. E közlemény célja a gyógyszerallergiás reakciók diagnosztikai lehetőségeinek rövid áttekintése és a lymphocytatranszformációs teszt gyógyszer-hiperszenzitivitási reakciókban való bizonyító szerepének bőrgyógyászati szempontok szerinti értékelése. A lymphocytatranszformációs teszt azon a megfigyelésen alapul, hogy a gyógyszerrel való első találkozáskor kialakult antigénspecifikus T-sejtek osztódni kezdenek az antigénnel való in vitro megismételt találkozás után. A szenzibilizációt az osztódó T-sejtekbe történő 3 H-timidin-beépülés mértéke jelzi. A hatóanyag-specifikus T-sejtek szinte mindig részt vesznek a gyógyszerallergiás reakciókban, ezért a vizsgálat előnye, hogy sok gyógyszernél és különböző immunreakciók eseteiben egyaránt jól alkalmazható. Hátránya a munkaigényesség, valamint az, hogy specificitásának és szenzitivitásának bizonyításához hiányoznak a széles körű, nagy beteganyagon elvégzett tanulmányok. Emiatt a teszt nem egyértelműen elfogadott a gyógyszerallergia igazolására. Hiányosságai ellenére azonban, jobb prediktív értékű egyéb vizsgálatok hiányában, a lymphocytatranszformációs tesztnek fontos szerepe van a gyógyszerallergiák diagnosztizálása terén.
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