title: Antimicrobial activity of phenothiazines, benzo[a]phenothiazines and benz[c]acridines.
abstract: The abilities of 14 phenothiazines, 8 benzo[a]phenothiazines and 12 benz[c]acridines to induce an antibacterial effect against Escherichia coli K12 were compared. Several phenothiazines, which showed antiplasmid activity, displayed the most potent antibacterial activity. All benz[c]acridine derivatives were moderately antibacterial, whereas benzo[a]phenothiazines were inactive. The active phenothiazine derivatives had more potent inhibitory activity against fungi, including phytopathogen filamentous, human pathogen filamentous fungi and yeasts, than against gram-positive and -negative bacteria. Taken together with previously reported data, the induction mechanism of antimicrobial and antiplasmid activity by these compounds seems to be different from that of antitumor, differentiation-inducing and carcinogenic activity.
authors.affiliation: Department of Medicinal Chemistry, Meiji College of Pharmacy, Tokyo, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Motohashi
authors.forename: H
authors.initials: H
authors.lastname: Sakagami
authors.forename: T
authors.initials: T
authors.lastname: Kurihara
authors.forename: L
authors.initials: L
authors.lastname: Ferenczy
authors.forename: K
authors.initials: K
authors.lastname: Csuri
authors.forename: J
authors.initials: J
authors.lastname: Molnar
mesh_terms: D000166:Acridines / Q000737:chemistry / Q000494:pharmacology*; D004926:Escherichia coli / Q000187:drug effects*; D005658:Fungi / Q000187:drug effects*; D008826:Microbial Sensitivity Tests; D010640:Phenothiazines / Q000737:chemistry / Q000494:pharmacology*; D013329:Structure-Activity Relationship
chemical_list: D000166:Acridines; D010640:Phenothiazines; C032894:benz(a)acridine