Abstract:
:The dopamine D4 receptor has been shown to play key roles in certain CNS pathologies including addiction to cigarette smoking. Thus, selective D4 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 DAD4 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 D4 receptor. Compound 27 (KiD4=0.84 nM) was the most potent of the compounds tested. However, it only had moderate selectivity for the D4 receptor. Compound 28 (KiD4=3.9 nM) while not as potent, was more discriminatory for the D4 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, 5HT1AR and 5HT2BR, have binding affinity constants better than 100 nM (Ki <100 nM). Compound 28 is a potentially useful D4-selective ligand for probing disease treatments involving the D4 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.
journal_name
Bioorg Med Chemjournal_title
Bioorganic & medicinal chemistryauthors
Sampson D,Zhu XY,Eyunni SV,Etukala JR,Ofori E,Bricker B,Lamango NS,Setola V,Roth BL,Ablordeppey SYdoi
10.1016/j.bmc.2014.04.026subject
Has Abstractpub_date
2014-06-15 00:00:00pages
3105-14issue
12eissn
0968-0896issn
1464-3391pii
S0968-0896(14)00280-6journal_volume
22pub_type
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