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    PLoS One. 2011;6(11):e27673. Epub 2011 Nov 16.

    Design, synthesis, and pharmacological evaluation of haloperidol derivatives as novel potent calcium channel blockers with vasodilator activity.

    Chen Y, Zheng J, Zheng F, Wang J, Zhang Y, Gao F, Huang Z, Shi G.

    Source

    Department of Pharmacology, Shantou University Medical College, Shantou, Guangdong, China.

    Abstract

    Several haloperidol derivatives with a piperidine scaffold that was decorated at the nitrogen atom with different alkyl, benzyl, or substituted benzyl moieties were synthesized at our laboratory to establish a library of compounds with vasodilator activity. Compounds were screened for vasodilatory activity on isolated thoracic aorta rings from rats, and their quantitative structure-activity relationships (QSAR) were examined. Based on the result of QSAR, N-4-tert-butyl benzyl haloperidol chloride (16c) was synthesized and showed the most potent vasodilatory activity of all designed compounds. 16c dose-dependently inhibited the contraction caused by the influx of extracellular Ca(2+) in isolated thoracic aorta rings from rats. It concentration-dependently attenuated the calcium channel current and extracellular Ca(2+) influx, without affecting the intracellular Ca(2+) mobilization, in vascular smooth muscle cells from rats. 16c, possessing the N-4-tert-butyl benzyl piperidine structure, as a novel calcium antagonist, may be effective as a calcium channel blocker in cardiovascular disease.

    PMID:
    22110716
    [PubMed - indexed for MEDLINE]
    PMCID:
    PMC3218019
    Free PMC Article

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