title: Inhibition of monoamine oxidase-A activity in rat brain by synthetic hydrazines: structure-activity relationship (SAR).
abstract: A series of hydrazine derivatives was synthesized in order to evaluate their monoamine oxidase A (MAO-A) inhibitory effects. MAO-A inhibitory activity of 4-tosyl benzoic acid carbohydrazide was quite potent, similarly to that of the corresponding 4-benzyloxy-benzoic acid carbohydrazide and its N-cyanoethylated derivative. Structural variations of these compounds, such as the replacement of the 4-substitutent, of the aromatic ring on which the carbohydrazide moiety is grafted, as well as cyclization of the hydrazide moiety in five- or six-membered rings caused either significant decline or complete loss of MAO inhibitory properties. The most active compound (4-tosyl benzoic acid carbohydrazide) was also subjected to the forced swim test, an animal model of depression, eliciting a marked reduction in immobility time in rats, without affecting the locomotor activity, implying that it possesses anti-depressant properties due to inhibition of MAO type-A.
authors.affiliation: H E J Research Institute of Chemistry, International Center for Chemical Sciences, University of Karachi, Karachi 75270, Pakistan. dar@khi.comsats.net.pk
authors.forename: Ahsana
authors.initials: A
authors.lastname: Dar
authors.forename: Khalid M
authors.initials: KM
authors.lastname: Khan
authors.forename: Humayun S
authors.initials: HS
authors.lastname: Ateeq
authors.forename: Shagufta
authors.initials: S
authors.lastname: Khan
authors.forename: Shagufta
authors.initials: S
authors.lastname: Rahat
authors.forename: Shahnaz
authors.initials: S
authors.lastname: Perveen
authors.forename: Claudiu T
authors.initials: CT
authors.lastname: Supuran
mesh_terms: D000818:Animals; D001921:Brain / Q000187:drug effects / Q000201:enzymology*; D004305:Dose-Response Relationship, Drug; D005260:Female; D006834:Hydrazines / Q000138:chemical synthesis* / Q000494:pharmacology; D008297:Male; D051379:Mice; D008928:Mitochondria / Q000187:drug effects / Q000201:enzymology; D008995:Monoamine Oxidase / Q000378:metabolism; D008996:Monoamine Oxidase Inhibitors / Q000494:pharmacology*; D009043:Motor Activity / Q000187:drug effects; D010624:Phenelzine / Q000494:pharmacology; D051381:Rats; D017208:Rats, Wistar; D012701:Serotonin / Q000032:analysis; D013329:Structure-Activity Relationship
chemical_list: D006834:Hydrazines; D008996:Monoamine Oxidase Inhibitors; D012701:Serotonin; D008995:Monoamine Oxidase; D010624:Phenelzine