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Yıl:2007; Cilt: 17; Sayı: 2>> Özet
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Klinik Psikofarmakoloji Bülteni; 2007;17(2):62-67
Hafif kognitif bozuklukta donepezilin bilişsel işlevler üzerine etkinliği
Y Özenli, D Yağcı, S Karaca
Başkent Üniversitesi Tıp Fakültesi Psikiyatri ABD, Adana
Amaç: Karmaşık mesleki ve sosyal görevleri olumsuz yönde etkileye­cek, klinik olarak fark edilebilir düzeyde bilişsel bozulma ile giden du­rum, hafif kognitif bozukluk olarak bilinmektedir. Tedavide asetilkoli-nesteraz inhibitörlerinin kullanılması yakın zamana rastlamaktadır. Bu ilaçların kognitif fonksiyonlar üzerine etkinliği az sayıdaki çalışmayla ortaya konmuştur. Bu çalışmanın amacı, hafif kognitif bozukluğu olan hastalarda Donepezil'in kognitif fonksiyonlar üzerine etkisini araştır­maktır.
Yöntem: Bu çalışma 51 kişiden oluşmuştu. Randomize olarak seçilen 26 hasta çalışma grubunu, 25 hasta ise kontrol grubunu oluşturdu. Çalışma grubuna 24 hafta süreyle Donepezil HCI verildi. Kontrol gru­buna ise herhangi bir psikotrop ilaç verilmedi. Bütün hastaların kog­nitif fonksiyonlar ilk çalışmaya alındığında, 4 hafta sonra ve 24 hafta sonra Wechsler Memory Scale-Revised'ın (WMS-R) yedi alt ölçeği ile değerlendirildi.
Bulgular: Donepezil alan grup ile kontrol grubu arasında şekil belleği alt ölçeği, sözel çağrışım çiftleri alt ölçeği ve mantıksal bellek alt ölçe­ği açısında fark istatistiksel olarak anlamlıydı (p<0,001). Çalışma gru­bunda sözel çağrışım çiftleri ve mantıksal bellek skorları iyileşmiş bu­lundu ancak şekil belleğinde azalma tespit edildi. Sonuçlar: Donepezil hafif kognitif bozukluğu olan hastalarda özellik­le hafıza ve dikkat üzerinde düzelmeye sebep olmuştur. Şekil belleği skorundaki düşüş Donezepilin beynin her bölgesinde aynı etkiyi gös-termemesiyle açıklanabilir.
Efficacy of donepezil on cognitive functions in mild cognitive impairment
Objective: The condition characterized by clinically distinctive cognitive impairment and likely to affect occupational and social functioning is known as Mild Cognitive Impairment (MCI). Acetyl­cholinesterase inhibitors have been used for the treatment of MCI up to now. However, there have been few studies to show the efficacy of these drugs on cognitive functions. The aim of this study was to investigate the effects of donepezil on cognitive functions in patients with MCI.
Method: This study included 51 patients. 26 patients were randomized to the study group and 25 to the control group. The study group received donepezil HCI for 24 weeks. The control group did not receive any psychotropic drugs. Cognitive functions of all patients were evaluated by seven subscales of the Wechsler Memory Scale-Revised (WMS-R) at baseline, 4th week and 24th week of the study. Results: There was a significant difference in figural memory, verbal paired associates and logical memory subscale scores between the groups (p<0,001). Although there was an improvement in verbal paired associates and logical memory subscale scores in the study group, there was a decrease on the figural memory test scores. Conclusion: It was found that donepezil led to an improvement especially in memory and attention in MCI. The decrease in figural memory scores can be explained by the fact that donepezil does not exert the same effect on all areas of the brain.

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