title: Inhibition of mouse-killing behavior by S-adenosyl-L-methionine in midbrain raphe-lesioned and olfactory-bulbectomized rats.
abstract: The effect of S-adenosyl-L-methionine (SAM), a methyl donor, on mouse-killing behavior in rats with lesions of the midbrain raphe nuclei and in olfactory-bulbectomized rats was investigated. Systemic administration of SAM at doses of 180 and 320 mg/kg IP caused a significant inhibition of both kinds of mouse-killing behavior. The inhibitory effects of SAM on both types of mouse-killing behavior were almost equipotent. Microinjection of SAM at 10-100 micrograms/rat into the lateral ventricle also inhibited mouse-killing behavior induced by raphe lesions in a dose-dependent manner. The ED50 value of SAM for this effect was 38.6 (18.4-81.4) micrograms/rat. It is concluded that SAM has inhibitory effects on mouse-killing behavior in both raphe-lesioned and olfactory-bulbectomized rats through a site of action in the central nervous system.
authors.affiliation: Department of Pharmacology, Faculty of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Yamamoto
authors.forename: S
authors.initials: S
authors.lastname: Yatsugi
authors.forename: M
authors.initials: M
authors.lastname: Ohno
authors.forename: S
authors.initials: S
authors.lastname: Ueki
mesh_terms: D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects*; D003863:Depression; D004195:Disease Models, Animal; D004305:Dose-Response Relationship, Drug; D008297:Male; D008636:Mesencephalon / Q000187:drug effects* / Q000502:physiology; D051379:Mice; D009830:Olfactory Bulb / Q000187:drug effects* / Q000502:physiology; D011903:Raphe Nuclei / Q000187:drug effects / Q000502:physiology; D051381:Rats; D011919:Rats, Inbred Strains; D012436:S-Adenosylmethionine / Q000008:administration & dosage / Q000494:pharmacology*
chemical_list: D012436:S-Adenosylmethionine