title: Cardioprotective effect of 'methylamine irisolidone', a new compound, in hypoxia/reoxygenation injury in cultured rat cardiac myocytes.
abstract: 'Methylamine irisolidone' (=5,7-dihydroxy-6-methoxy-3-(4-methoxyphenyl)-8-[(methylamino)methyl]-4H-[1]benzopyran-4-one), a new compound, is a structurally modified kakkalide with good water solubility. In this study, we investigated its effect on hypoxia/reoxygenation (H/R) injury in cultured rat cardiac myocytes. The results showed that methylamine irisolidone could significantly inhibit lactate dehydrogenase (LDH) release, enhance the mitochondrial membrane potential, decrease intracellular calcium (Ca(2+)) associated with the attenuation of reactive oxygen species (ROS) generation, reduce contents of malondialdehyde (MDA), and increase the activity of superoxide dismutase (SOD) after H/R in a dose-dependent manner. The present study demonstrated that methylamine irisolidone can directly protect cardiomyocytes against H/R injury, primarily as a result of reduction of the intracellular Ca(2+) overload coincident with an attenuation of ROS generation and ROS-mediated lipid peroxidation, which may contribute to the preservation of mitochondrion function and antioxidant against H/R injury.
authors.affiliation: Department of Pharmacology, School of Medicine, Shandong University, Jinan, PR China.
authors.forename: Yan-Ling
authors.initials: YL
authors.lastname: Mu
authors.forename: Yan-Ying
authors.initials: YY
authors.lastname: Xie
authors.forename: Ling
authors.initials: L
authors.lastname: Zhou
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhong
authors.forename: Lu
authors.initials: L
authors.lastname: Liu
authors.forename: Hong
authors.initials: H
authors.lastname: Bai
authors.forename: Yuan-Shu
authors.initials: YS
authors.lastname: Wang
authors.forename: Xiu-Mei
authors.initials: XM
authors.lastname: Zhang
mesh_terms: D000818:Animals; D002118:Calcium / Q000378:metabolism; D002470:Cell Survival / Q000187:drug effects; D002478:Cells, Cultured; D000860:Hypoxia / Q000378:metabolism; D007529:Isoflavones / Q000627:therapeutic use*; D053078:Membrane Potential, Mitochondrial / Q000187:drug effects; D015428:Myocardial Reperfusion Injury / Q000378:metabolism; D032383:Myocytes, Cardiac / Q000187:drug effects*; D051381:Rats; D017208:Rats, Wistar; D017382:Reactive Oxygen Species / Q000378:metabolism
chemical_list: C544752:5,7-dihydroxy-6-methoxy-3-(4-methoxyphenyl)-8-((methylamino)methyl)-4H-(1)benzopyran-4-one; D007529:Isoflavones; D017382:Reactive Oxygen Species; D002118:Calcium