ALZHEİMER HASTALIĞINA KARŞI YENİ PİPERAZİN TÜREVLERİNİN SENTEZİ VE BİYOLOJİK AKTİVİTELERİNİN DEĞERLENDİRİLMESİ

Alzheimer hastalığı dünyada en sık görülen nörodejeneratif hastalıklardan biridir. Dünya nüfusunun yaş ortalamasının artması ile artan hasta sayısı, radikal bir tedavinin mevcut olmaması yeni bileşiklerin geliştirilmesine ihtiyaç oluşturmaktadır. Hastalığa karşı kolinesteraz inhibitörleri sıklıkla kullanılmaktadır. Bilinen iki kolinesteraz, asetilkolinesteraz (AChE) ve butirilkolinesteraz (BChE)’dır. AH'dan etkilenen beyinlerde, normal koşullar altında ACh hidrolizinden sorumlu ana enzim olan AChE miktarı azalırken, BChE konsantrasyonu korunur, hatta yükselebilmektedir.Bu çalışma kapsamında8 yeni bileşikten oluşan 6-(2-(4-sübstitüepiperazin-1-il) asetil)-2H-benzo[b] [1,4] oksazin-3(4H)-on (1a-1h) serisi sentezlenmiştir. Elde edilen bileşiklerin yapıları 1H-NMR, 13C-NMR ve HRMS spektroskopisi verileri kullanılarak aydınlatılmıştır. Bileşiklerin in vitrokolinesteraz (ChE) inhibitör aktivitesi Elmann metodu kullanılarak değerlendirilmiştir. Sentezlenen bileşikler içerisinde 1b ve 1e kodlu bileşikler asetilkolinesteraza (AChE) karşı önemli düzeyde inhibitor etkinlik göstermiştir. Sentezlenen bileşiklerin asetilkolinesteraz inhibitör potansiyelleri incelendiğinde umut verici sonuçlara ulaşıldığı görülmektedir. Ayrıca aktif türevler ile gerçekleştirilen in siliko moleküler doklama çalışmaları ile aktif bileşiklerin enzim aktif bölgesine oturduğu ve bu bölgedeki aminoasitler ile etkileştiği görülmektedir. Elde edilen bileşikler üzerinde yapılan modifikasyonlar ile daha etkili yeni bileşiklere ulaşılması planlanmaktadır.

Anahtar Kelimeler:

Piperazin, Asetilkolin, Alzheimer

SYNTHESIS AND EVALUATION OF BIOLOGICAL ACTIVITIES OF NEW PIPERAZINE DERIVATIVES AGAINST ALZHEIMER'S DISEASE

Alzheimer's disease is one of the most common neurodegenerative diseases in the world. The increasing number of patients with the aging of the world population and the absence of a radical treatment create a need for the development of new compounds. Cholinesterase inhibitors are frequently used against the disease. The two known cholinesterase’s are acetylcholinesterase (AChE) and butyrylcholinesterase (BChE). In AD-affected brains, the amount of AChE, the main enzyme responsible for ACh hydrolysis, is reduced under normal conditions, while the concentration of BChE is maintained or even increased.The 6-(2-(4-substitutedpiperazin-1-yl) acetyl)-2H-benzo[b][1,4] oxazin-3(4H)-one (1a-1h) series consisting of 8 new compounds was synthesized. The structures of the obtained compounds were elucidated using 1H-NMR, 13C-NMR and HRMS spectroscopy data. The in vitro cholinesterase (ChE) inhibitory activity of the compounds was evaluated using the Ellman's method. Among the synthesized compounds, the compounds 1b and 1e showed significant inhibitory activity against acetylcholinesterase (AChE). When the acetylcholinesterase inhibitory potentials of the synthesized compounds are examined, it is seen that promising results have been achieved. Additionally, in silico molecular docking studies with active derivatives show that active compounds have settled in the enzyme active site and interact with amino acids in this region. It is planned to reach more effective new compounds with the modifications made on the obtained compounds.

Keywords:

Piperazine, Acetylcholine, Alzheimer,

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