Identification of a new selective dopamine D4 receptor ligand
摘要:
The dopamine D-4 receptor has been shown to play key roles in certain CNS pathologies including addiction to cigarette smoking. Thus, selective D-4 ligands may be useful in treating some of these conditions. Previous studies in our laboratory have indicated that the piperazine analog of haloperidol exhibits selective and increased affinity to the DAD(4) receptor subtype, in comparison to its piperidine analog. This led to further exploration of the piperazine moiety to identify new agents that are selective at the D-4 receptor. Compound 27 (KiD4 = 0.84 nM) was the most potent of the compounds tested. However, it only had moderate selectivity for the D-4 receptor. Compound 28 (KiD4 = 3.9 nM) while not as potent, was more discriminatory for the D-4 receptor subtype. In fact, compound 28 has little or no binding affinity to any of the other four DA receptor subtypes. In addition, of the 23 CNS receptors evaluated, only two, 5HT(1A)R and 5HT(2B)R, have binding affinity constants better than 100 nM (K-i < 100 nM). Compound 28 is a potentially useful D-4-selective ligand for probing disease treatments involving the D-4 receptor, such as assisting smoking cessation, reversing cognitive deficits in schizophrenia and treating erectile dysfunction. Thus, further optimization, functional characterization and evaluation in animal models may be warranted. Published by Elsevier Ltd.
Identification of a new selective dopamine D4 receptor ligand
摘要:
The dopamine D-4 receptor has been shown to play key roles in certain CNS pathologies including addiction to cigarette smoking. Thus, selective D-4 ligands may be useful in treating some of these conditions. Previous studies in our laboratory have indicated that the piperazine analog of haloperidol exhibits selective and increased affinity to the DAD(4) receptor subtype, in comparison to its piperidine analog. This led to further exploration of the piperazine moiety to identify new agents that are selective at the D-4 receptor. Compound 27 (KiD4 = 0.84 nM) was the most potent of the compounds tested. However, it only had moderate selectivity for the D-4 receptor. Compound 28 (KiD4 = 3.9 nM) while not as potent, was more discriminatory for the D-4 receptor subtype. In fact, compound 28 has little or no binding affinity to any of the other four DA receptor subtypes. In addition, of the 23 CNS receptors evaluated, only two, 5HT(1A)R and 5HT(2B)R, have binding affinity constants better than 100 nM (K-i < 100 nM). Compound 28 is a potentially useful D-4-selective ligand for probing disease treatments involving the D-4 receptor, such as assisting smoking cessation, reversing cognitive deficits in schizophrenia and treating erectile dysfunction. Thus, further optimization, functional characterization and evaluation in animal models may be warranted. Published by Elsevier Ltd.
Structure–activity relationship studies of SYA 013, a homopiperazine analog of haloperidol
作者:Kwakye Peprah、Xue Y. Zhu、Suresh V.K. Eyunni、Jagan R. Etukala、Vincent Setola、Bryan L. Roth、Seth Y. Ablordeppey
DOI:10.1016/j.bmc.2012.01.022
日期:2012.3
Structure-activity relationship studies on 4-(4-(4-chlorophenyl)-1,4-diazepan-1-yl)-1-(4-fluorophenyl) butan-1-one (SYA 013), a homopiperazine analog of haloperidol has resulted in an understanding of the effect of structural modifications on binding affinity at dopamine and serotonin receptor subtypes. Further exploration, using bioisosteric replacement strategies has led to the identification of several new agents including compounds 7, 8, 11 and 12 which satisfy the initial criteria for further exploration as new antipsychotic agents. In addition, compound 18, a D-3 selective tropanol, has been identified as having the potential for further optimization into a useful drug which may combat neuropsychiatric diseases. Published by Elsevier Ltd.