Peptidomimetic ligands for cellular receptors and ion channels
申请人:Persons E Paul
公开号:US20050080271A1
公开(公告)日:2005-04-14
One aspect of the present invention relates to novel peptidomimetic compounds. A second aspect of the present invention relates to the use of the novel peptidomimetic compounds as ligands—agonists or antagonists—for various cellular receptors, e.g., G-protein-coupled receptors and opioid receptors, and various cellular ion channels, e.g., sodium and calcium. In certain embodiments, compounds of the present invention preferentially or selectively inhibit sodium or calcium ion channels. In certain embodiments, compounds of the present invention preferentially or selectively agonize or antagonize $gm opioid receptors. In certain embodiments, compounds of the present invention preferentially or selectively inhibit sodium or calcium ion channels and agonize or antagonize $gm-opioid receptors.
Activation of the newly identified σ1 chaperone protein is involved in several aspects of the psychostimulant and addictive effects of cocaine. The development of ligands that selectively target the σ1 protein may lead to putative potent anti-cocaine agents. We report here a new and more convergent synthetic pathway to amino side chain substituted hydantoins. Twenty new analogs of our lead compound were synthesized. None of them showed better in vitro affinity for σ1 receptor than our lead compound. Nevertheless, three of them, obtained as racemates, showed high in vitro affinity and selectivity for σ1 receptor. A preliminary in vivo evaluation of their pharmacological activity identified compound 22 as one that increases cocaine-induced locomotor stimulation and therefore acts as a potential efficient σ1 agonist.