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  • 1 „La Sapienza” Tudományegyetem Szemészeti Klinika Roma Via Sardegna 139. 00187 Italia
  • | 2 Pécsi Tudományegyetem, Általános Orvostudományi Kar Szemészeti Klinika Pécs
  • | 3 Semmelweis Egyetem, Általános Orvostudományi Kar Szemészeti Klinika Budapest
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Az időskori makuladegeneráció napjaink egyik leggyakoribb, végleges és súlyos látáskárosodást okozó szemészeti betegsége. Becslések szerint Magyarországon 300–500 ezerre tehető az érintettek száma. Míg korábban semmilyen kezelés nem volt erre a betegségre, az elmúlt évtizedben igen elterjedt az antioxidáns-terápia, ami nagy adag antioxidáns vitaminok (C-vitamin, E-vitamin, béta-karotin) és cink kombinációja. Elméleti meggondolások és nagyrészt in vitro kísérletek alapján a reaktív oxigéngyökök közömbösítése révén fejti ki hatását. Egy klinikai tanulmány (AREDS) szerint jelentősen csökkentette az előrehaladott stádium kialakulását, de nem volt hatással a korai stádiumra. A potenciális mellékhatások miatt azonban ez az eredeti kombináció már nincs a forgalomban, a módosított összetételű és dózisú készítmények hatása viszont nincs bizonyítva. Új megközelítést jelent a metabolikus terápia, egy omega-3-zsírsavakat, koenzim-Q10-et és acetyl-L-carnitint tartalmazó készítmény, amely az időskori makuladegenerációban meghatározó szerepet játszó mitochondrialis diszfunkció csökkentése révén javítja a pigmenthám zsíranyagcseréjét, ATP-termelését, a fotoreceptor regenerációját, és csökkenti a reaktív oxigéngyökök képződését. Egy előzetes tanulmány és egy randomizált, placebokontrollált, kettős klinikai vakvizsgálat szerint az időskori makuladegeneráció korai stádiumában a metabolikus terápia már 3–6 hónap után kisfokú javulást eredményezett a centrális látótérben és a látásélességben, ami megmaradt az 1 éves megfigyelési idő végéig. A különbség statisztikailag szignifikáns volt mind a kiindulási értékhez, mind a kontrollhoz viszonyítva. A látásfunkciók javulása, majd stabilizálódása együtt járt a szemfenéki kép javulásával: a drusen kiterjedése szignifikánsan csökkent mind a kiindulási állapothoz, mind a kontrollhoz viszonyítva. Jellemző módon, a kezelés hatása szignifikánsan nagyobb volt kevésbé súlyos állapotú szemeken. A hosszabb időtartamú (6 éves) esettanulmányok megerősítették ezeket a tapasztalatokat azzal a megjegyzéssel, hogy a látásfunkciók a kezdeti javulás után már nem változtak, míg a drusenregresszió évekig tovább folytatódott. Esetenként igen jelentős drusenregresszió volt megfigyelhető a középsúlyos, illetve súlyos esetekben is. Mindezek a megfigyelések amellett szólnak, hogy a mitochondrialis anyagcsere javítása racionális és hatásos eljárás az időskori makuladegeneráció kezelésére. Jelenleg ez az egyetlen készítmény, amelynek adagolása megfelel a napi ajánlott mennyiségnek, ugyanakkor hatásosságát klinikai vizsgálatok támasztják alá.

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