title: Methylated arginine analogues: their potential role in atherosclerosis and cognition using the poloxamer-407-induced mouse model of dyslipidemia.
abstract: An experimental mouse model of dyslipidemia and atherosclerosis was utilized to study the generation of methylarginines in vivo, as well as any potential behavioral changes in mice associated with the production of excess methylarginines. Following 14 weeks of poloxamer 407 treatment, mice developed atherosclerosis and the plasma concentrations of monomethylarginine and asymmetric dimethylarginine were found to be significantly greater than corresponding concentrations in control mice. This finding may have contributed to the development of aortic atherosclerotic lesions in poloxamer-treated mice by interfering with nitric oxide availability and, hence, normal function of vascular endothelium. Poloxamer-407-treated mice also showed a significant decrease in locomotor and exploratory activity, together with signs of emotional stress and anxiety relative to controls. Passive avoidance testing to assess learning and memory provided suggestive evidence that poloxamer-treated mice could potentially be characterized as having undergone a disruption in the process of forgetting about an aversive event, specifically, a foot shock, when compared with control mice. Thus, it is also suggested that the increase in both plasma monomethylarginine and asymmetric dimethylarginine in poloxamer-407-treated mice may somehow influence learning and memory, because endothelial dysfunction caused by reduced nitric oxide availability has been hypothesized to negatively influence cognitive function.
authors.affiliation: a Scientific Research Institute of Physiology and Basic Medicine, 4 Timakova St., 630117, Novosibirsk, Russian Federation.
authors.forename: Michael A
authors.initials: MA
authors.lastname: Gilinsky
authors.affiliation: b Division of Pharmaceutical Sciences, School of Pharmacy, University of Missouri-Kansas City, Kansas City, MO 64108-2718, USA.
authors.forename: Thomas P
authors.initials: TP
authors.lastname: Johnston
authors.affiliation: c Voroztzov N.N. Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, Prosp. Acad. Lavrentjev, 630090, Novosibirsk, Russian Federation.
authors.forename: Natalia A
authors.initials: NA
authors.lastname: Zhukova
authors.affiliation: a Scientific Research Institute of Physiology and Basic Medicine, 4 Timakova St., 630117, Novosibirsk, Russian Federation.
authors.forename: Nina I
authors.initials: NI
authors.lastname: Dubrovina
authors.affiliation: a Scientific Research Institute of Physiology and Basic Medicine, 4 Timakova St., 630117, Novosibirsk, Russian Federation.
authors.forename: Tatyana V
authors.initials: TV
authors.lastname: Latysheva
authors.affiliation: a Scientific Research Institute of Physiology and Basic Medicine, 4 Timakova St., 630117, Novosibirsk, Russian Federation.
authors.forename: Sergey E
authors.initials: SE
authors.lastname: Naumenko
authors.affiliation: a Scientific Research Institute of Physiology and Basic Medicine, 4 Timakova St., 630117, Novosibirsk, Russian Federation.
authors.forename: Roman A
authors.initials: RA
authors.lastname: Sukhovershin
keywords: atherosclerosis; athérosclérose; dyslipidemia; dyslipidémie; l-arginine; methylarginines; méthylarginines; nitric oxide; oxyde nitrique