• Title/Summary/Keyword: tricyclic isoxazoles

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3D-QSAR Analysis on Antidepressant Activity of Tricyclic Isoxazole Analogues against Medetomidine-induced Loss of Righting (Medetomidine에 유발된 정좌반사소실에 대한 Tricyclic Isoxazole 유도체들의 항우울성에 관한 3D-QSAR 분석)

  • Choi, Min-Sung;Sung, Nack-Do;Myung, Pyung-Keun
    • YAKHAK HOEJI
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    • v.55 no.2
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    • pp.98-105
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    • 2011
  • To search the minimum structural requirement of tricyclic isoxazole analogues (1~30) as new class potent antidepressant, thee-dimensional quanti- tative-structure relationship (3D-QSAR) models between substituents ($R_1{\sim}R_5$) of tricyclic isoxazoles and their antidepressant activity against medetomidine-induced loss of righting were performed and discussed quantitatively using comparative molecular field analysis (CoMFA) and comparative molecular similarity indies analysis (CoMSIA) methods. The correlativity and predictability ($r^2$=0.484 and $q^2$=0.947) of CoMSIA-2 model were higher than those of the rest models. The inhibitory activity against medetomidine-induced loss of righting was dependent on electrostatic field (43.4%), hydrophobic field (35.3%), and steric field (21.2%) of tricyclic isoxazoles. From the CoMSIA-2 contour maps, it is predicted that the antidepressant activity of potent antidepressants against medetomidine-induced loss of righting will be able to increase by the substituents ($R_1{\sim}R_5$) which were in accord with CoMSIA field.

3D-QSAR Analysis of Antidepressant, Tricyclic Isoxazole Analogues against para-Chloroamphetamine-induced Excitation (para-Chloroamphetamine에 유도된 흥분작용에 대한 항우울 약물 Tricyclic Isoxazole 유도체들의 3D-QSAR 분석)

  • Choi, Min-Sung;Sung, Nack-Do;Myung, Pyung-Keun
    • YAKHAK HOEJI
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    • v.55 no.2
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    • pp.91-97
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    • 2011
  • To search a new anti-depressant agents against para-chloroamphetamine-induced excitation, three dimensional quantitative-structure relationships (3D-QSAR) models between structure of 3a,4-dihydro-3H-[1]-benzopyronao[4,3]isoxazoles (1-30) and thieir inhibitory activity against para-chloroamphetamine-induced excitation were performed and discussed quantitatively using comparative molecular field analysis (CoMFA) and comparative molecular similarity indices analysis (CoMSIA) methods. From these basis on the findings, the optimized CoMSIA-2F model ($q^2$=0.793 and $r^2$=0.952) showed the best statistical results. And also, it is found that the para-chloroamphetamine inhibitory activity from the optimized CoMSIA-2F model was dependent on steric field (35.2%) and electrostatic field (64.8%) of tricyclic isoxazoles. Particularly, it is predicted that the inhibitory activity against para-chloroamphetamine-induced excitation will be able to increase by the designed compounds from the CoMSIA-2F model.

Interactions of Tricyclic Isoxazole Analogues with ${\alpha}_{2c}$-Adrenoceptor by Homology Modeling (상동성 모델링을 이용한 Tricyclic Isoxazole 유도체와 ${\alpha}_{2c}$-Adrenoceptor의 상호작용)

  • Choi, Kyoung-Seob;Kang, Na-Na;Myung, Pyung-Keun;Sung, Nack-Do
    • YAKHAK HOEJI
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    • v.54 no.4
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    • pp.300-308
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    • 2010
  • Adrenoceptor has been considered to be an important target in psychiatric disorders. Based on x-ray structures of bovine rhodopsin, we established homology model of ${\alpha}_{2c}$-adrenoceptor (ADA2C_rat) and then analyzed docking from binding model of receptor-ligand complex with high-active compound No.29 in tricyclic isoxazole analogues (1-30). We observed that the N (1.907 $\AA$) and O (1.712 $\AA$) atoms of isoxazole ring on the docked ligand (No.29) formed H-bonding interaction with O-H of Ser5.32 and carmeron phenyl ring centroid of tricyclic isoxazole formed $\pi-\pi$ interaction at 3.342 $\AA$ distance with phenyl ring centroid of Phe6.52. According to predictions of blood-brain distribution (logBB) through penetration of blood-brain barrie (BBB) and polar surface area (PSA) of the ligands, the high-active compound No.29 has values of logBB=-0.203, PSA=67.50, respectively. These results suggest that the high-active compound No.29 is a novel anti-depressant with the characteristics such as dopamine and serotonin.