4-Pyridinio-1,4-Dihydropyridines as Calcium Ion Transport Modulators: Antagonist, Agonist, and Dual Action

Oxidative Medicine and Cellular Longevity

Iveta Kanepe-Lapsa¹  Ilona Domracheva¹  Imanta Bruvere²  Egils Bisenieks²  Astrida Velena²  Gunars Duburs²  Reinis Vilskersts³  Baiba Turovska⁴ 

[1]Latvian Institute of Organic Synthesis, Group of Experimental Chemotherapy, Aizkraukles Iela 21, Riga, Latvia, LV-1006, osi.lv

[2]Latvian Institute of Organic Synthesis, Laboratory of Membrane Active Compounds and β-Diketones, Aizkraukles Iela 21, Riga, Latvia, LV-1006, osi.lv

[3]Latvian Institute of Organic Synthesis, Laboratory of Pharmaceutical Pharmacology, Aizkraukles Iela 21, Riga, Latvia, LV-1006, osi.lv

[4]Latvian Institute of Organic Synthesis, Laboratory of Physical-Organic Chemistry, Aizkraukles Iela 21, Riga, Latvia, LV-1006, osi.lv

DOI  :  10.1155/2020/2075815

来源: publisher

【 摘 要 】

A set of six new 4-pyridinio-1,4-dihydropyridine (1,4-DHP) compounds has been synthesized. The calcium channel modulating activity of these compounds was evaluated in an aorta vascular smooth muscle cell line (A7R5), in an isolated rat aortic ring model, and in human neuroblastoma cell lines (SH-SY5Y). The antagonistic effect of these 1,4-DHP was tested by modulating the impact of carbachol-dependent mobilization of intracellular Ca2+ in SH-SY5Y cells. The intracellular free Ca2+ concentration was measured in confluent monolayers of SH-SY5Y cells and A7R5 cells with the Ca2+-sensitive fluorescent indicator Fluo-4 NW. Only four compounds showed calcium channel blocking activity in SH-SY5Y and A7R5 cells as well as in the aortic ring model. Among them, compound 3 was the most active calcium channel antagonist, which had 3 times higher activity on carbachol-activated SH-SY5Y cells than amlodipine. Two of the compounds were inactive. Compound 4 had 9 times higher calcium agonist activity than the classic DHP calcium agonist Bay K8644. The intracellular mechanism for the action of compound 4 using inhibitor analysis was elucidated. Nicotinic as well as muscarinic receptors were not involved. Sarcoplasmic reticulum (ER) Ca2+ (SERCA) stores were not affected. Ryanodine receptors (RyRs), another class of intracellular Ca2+ releasing channels, participated in the agonist response evoked by compound 4. The electrooxidation data suggest that the studied compounds could serve as antioxidants in OS.

【 授权许可】

CC BY