Thiourea derivatives have been shown to posses several biological activities. Therefore a series of N-substituted -N'-(3,5-di/1,3,5trimethylpyrazole-4-yl)thioureas were synthesized and the antitubercular and anticonvulsant activities were studied. Among the new compounds, N-phenyl-N'-(3,5-dimethylpyrazole4-yl)thiourea (S) was demonstrated to have remarkable anticonvulsant activity. In this study, S was selected as a model compound and the in vivo metabolic pathway in rats was investigated. The substrate was given intraperitoneally (50 mg/kg) and blood samples were collected at 0, 1, 2, 4, 8, 12, 24 and 48 h. The substrate and its potential metabolites were separated using HPLC on reverse phase system. The substrate was detected at all times with small quantity of metabolites.
Antidepresan benzeri etkili 2-pirazolin türevleriAmaç: Yaygın, kronik ve tekrarlama riski olan psikiyatrik bir hastalık olarak depresyon, farklı sistemleri etkileyebilen semptomlar bütünüyle karakterize edilir. Patogenezinde rol oynayan çok farklı sistemlerin olması ve tedaviye verilen yanıtta görülen farklar, ilaç tedavisiyle tam bir iyileşme sağlanmasını engelleyerek yeni tedavi seçeneklerinin keşfedilmesi için yapılan çalışmaları hızlandırmaktadır. Daha önce birçok araştırmada pirazolin türevlerinin antidepresan ajan olarak tedavi potansiyeline sahip oldukları gösterilmiştir. Bu çalışmada ise bir seri yeni 2-pirazolin türevlerinin antidepresan benzeri etki profillerinin aydınlatılması amaçlanmıştır. Yöntem: Antidepresan benzeri aktivite Balb/C farelerde kuyruktan asma testi ve bu testte etkili olduğu tespit edilen maddeler için zorunlu yüzme testi kullanılarak değerlendirilmiştir. Her iki testte de antidepresan benzeri etkinin göstergesi, her bir hayvan için toplam hareketsiz kalma süresi olarak kabul edilmiştir. Bulgular: 3d ve 3e kodlu test bileşiklerinin antidepresan benzeri etkili olduğu belirlenmiş ve uygulanan her iki testte de referans ilaç imipramin grubunda gözlendiği gibi hareketsiz kalma sürelerinde kısalma gözlenmiştir. Ayrıca bileşikler farelerde lokomotor aktiviteyi etkilememiştir. Sonuç: Sonuçlarımız, 2-pirazolin türevi olan 3d ve 3e'nin depresyon tedavisinde yeni aday bileşiklerin tasarımı için potansiyel test maddeleri olduğunu göstermektedir. Anahtar sözcükler: Antidepresan benzeri aktivite, 2-pirazolin türevleri, zorunlu yüzme testi, kuyruktan asma testi ABS TRACT Antidepressant-like activity of 2-pyrazoline derivativesObjective: Depression is a common chronic recurrent psychiatric disorder, characterised by clusters of symptoms affecting many different systems. Due to complexity of the pathogenesis and differences in response to treatment, current therapies are incapable of providing an exact recovery, leading to attempts to investigate new treatment options. In many studies, it is shown that pyrazoline derivatives have the therapeutic potential as antidepressant agents. In this study, we aimed to investigate the antidepressant-like profile of a series of new 2-pyrazoline derivatives. Methods: Antidepressant-like activity was evaluated by using tail suspension test, which was followed by forced swim test for those compounds found effective in tail suspension test in Balb/c mice. The behavioural parameter observed in both tests was immobility period, which is an indicative of antidepressant-like effect. Results: Test compounds 3d and 3e were effective and a significant reduction in immobility time was observed when compared to results of imipramin, as the reference drug. Additionally, these two compounds did not alter the locomotor activity in mice. Conclusion:Our results indicate that two 2-pyrazoline derivatives, 3d and 3e, are potential compounds for use in designing of new candidates for the treatment of depression.
Elekt ro nik pos ta ad re si / E-ma il add ress: bkaymakciogluarmara.edu.tr Ka bul ta ri hi / Da te of ac cep tan ce: 17 Kasım 2014/ November 17, 2014 ÖZET Asetilkolin esteraz inhibitörü olan hidrazid hidrazonlar üzerinde çalışmalar Amaç: On beş adet hidrazit-hidrazon türevi sentezlenmiş ve asetilkolinesteraz enzimini (AChE) inhibe etme yetenekleri Ellman'ın modifiye spektrofotometrik yöntemi ile değerlendirilmiştir. Yöntem: Anti-asetilkolinesteraz aktivite tayini Ellman'ın modifiye edilmiş spektrofotometrik yöntemi kullanılarak yapılmıştır. Bu spektrofotometrik yöntem bir kromojenik reaktif olan 5,5-ditiyo-bis-(2-nitrobenzoik asit) ile salınan tiyokolinin renkli bir ürün vermesi esasına dayanır. Bulgular: Test edilen bileşikler arasında, 4-fluorobenzoik asit [(4-metoksifenil) metilen] hidrazid(6) ve 2-[(fluorobenzoil) hidrazono]-1,3-dihidroindol-3-on (15), referans ilaç donezepil (IC 50 =0.054±0.002μM) ile kıyaslandığında kayda değer anti-AChE aktivite göstermiştir. Sonuç: Anti-AChE aktivite sonuçları, p-metoksifenil sübstitüenti taşıyan bileşik 6 ve 1,3-dihidro-indol-3-on sübstitüenti taşıyan bileşik 15'in en aktif bileşikler olduğunu göstermiştir. Aktivite sonuçlarından, hidrazidhidrazon yapısı üzerinde hacimli grupların bulunmasının anti-AChE aktiviteye olumlu yönde katkıda bulunduğu görülmektedir. Anahtar sözcükler: Hidrazit, hidrazon, anti-asetilkolinesteraz aktivite ABS TRACT Studies on hydrazide-hydrazones derivatives as acetylcholinesterase inhibitorsObjective: Fifteen hidrazide-hydrazone derivatives were synthesized and evaluated for their ability to inhibit acetylcholinesterase (AChE) using a modification of Ellman's spectrophotometric method. Methods: Anti-acetylcholinesterase activity was evaluated by using a modification of Ellman'sspectrophotometric method. The spectrophotometric method is based on the reaction of released thiocholine to give a coloured product with a chromogenic reagent 5,5-dithio-bis-(2-nitrobenzoic acid). Results: Among the tested compounds, 4-fluorobenzoic acid [(4-methoxyphenyl) methylene] hydrazide (6) and 2-[(fluorobenzoyl) hydrazono]-1,3-dihydro-indol-3-one (15), showed noteworthy anti-AChE activity when compared to standard drug donepezil (IC 50 =0.054±0.002μM). Conclusion:The anti-AChE activity screening indicated that among the tested compounds, 6 with p-methoxyphenyl substitution and 15 with1,3dihydro-indol-3-one substitution represent the most active compounds. Based on the activity results, it appears that bulky groups on the hydrazide-hydrazone moiety have made good contribution to the anti-AChE activity.
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