title: The antioxidant edaravone attenuates pressure overload-induced left ventricular hypertrophy.
abstract: The free radical scavenger 3-methyl-1-phenyl-2-pyrazolin-5-one (edaravone) is used to treat patients with ischemic brain damage. We and others reported previously that in vitro and in vivo reactive oxygen species (ROS) act as second messengers to develop cardiac hypertrophy. In this study, we used an in vivo murine model of pressure overload-induced cardiac hypertrophy to examine the effects of edaravone on left ventricular hypertrophy. The animals were subjected to the transverse thoracic aorta constriction, and edaravone (10 mg/kg) was infused intraperitoneally twice daily. Seven days after the operation, we observed a significant increase in ROS production in hearts, which was eliminated by the treatment with edaravone. Pressure-overloaded hearts showed a significant increase in left ventricular weight/body weight ratio and the expression level of atrial natriuretic factor mRNA, which were attenuated by edaravone. It also reduced perivascular and intermuscular fibrosis and inhibited pressure overload-induced activation of apoptosis signal-regulating kinase 1 (ASK1) and its downstream kinases of c-Jun N-terminal protein kinase and p38 mitogen-activated protein kinase. Edaravone attenuated the hypertrophic response even when the treatment was started after the onset of cardiac hypertrophic response. These findings indicate that edaravone significantly attenuates pressure overload-induced cardiac hypertrophy mediated through its antioxidative function and subsequent inhibition of ASK1 signaling pathway.
authors.affiliation: Department of Internal Medicine and Therapeutics, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
authors.forename: Ikuko
authors.initials: I
authors.lastname: Tsujimoto
authors.forename: Shungo
authors.initials: S
authors.lastname: Hikoso
authors.forename: Osamu
authors.initials: O
authors.lastname: Yamaguchi
authors.forename: Kazunori
authors.initials: K
authors.lastname: Kashiwase
authors.forename: Atsuko
authors.initials: A
authors.lastname: Nakai
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Takeda
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Watanabe
authors.forename: Masayuki
authors.initials: M
authors.lastname: Taniike
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Matsumura
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Nishida
authors.forename: Masatsugu
authors.initials: M
authors.lastname: Hori
authors.forename: Mikihiko
authors.initials: M
authors.lastname: Kogo
authors.forename: Kinya
authors.initials: K
authors.lastname: Otsu
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000494:pharmacology*; D000983:Antipyrine / Q000031:analogs & derivatives* / Q000494:pharmacology; D000077553:Edaravone; D004789:Enzyme Activation / Q000187:drug effects; D016166:Free Radical Scavengers / Q000494:pharmacology*; D006973:Hypertension / Q000150:complications*; D017379:Hypertrophy, Left Ventricular / Q000209:etiology* / Q000378:metabolism / Q000473:pathology*; D048848:MAP Kinase Kinase Kinase 5 / Q000378:metabolism; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D009206:Myocardium / Q000378:metabolism; D018384:Oxidative Stress / Q000187:drug effects
chemical_list: D000975:Antioxidants; D016166:Free Radical Scavengers; D048848:MAP Kinase Kinase Kinase 5; C482859:Map3k5 protein, mouse; D000077553:Edaravone; D000983:Antipyrine