title: Synthesis and evaluation of novel fluorinated methotrexate derivatives for application to rheumatoid arthritis treatment.
abstract: An ongoing search for new antifolate drugs useful against rheumatoid arthritis (RA) led us to prepare new methotrexate (MTX) derivatives containing enantiomerically pure L-erythro- or L-threo-gamma-fluoroglutamic acid. The derivatives in which the phenyl ring was replaced by a 3'-substituted phenyl or methylthiophene ring showed potent immunosuppressive activities, including in vitro inhibition of mitogen responses to both T and B cells and in vivo inhibition of antibody production in mice. These compounds also exhibited inhibitory activity in adjuvant arthritis in rats. Their toxicity was lower than that of MTX, which was probably due to the strong electronegativity of fluorine, which increases the acidity of the gamma-carboxyl group and thereby decreases polyglutamylation in normal cells. These results revealed the potential of the fluorinated MTX derivatives as candidate drugs for the treatment of RA.
authors.affiliation: Shionogi Research Laboratories, Shionogi & Co., Ltd., Osaka, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Kokuryo
authors.forename: K
authors.initials: K
authors.lastname: Kawata
authors.forename: T
authors.initials: T
authors.lastname: Nakatani
authors.forename: A
authors.initials: A
authors.lastname: Kugimiya
authors.forename: Y
authors.initials: Y
authors.lastname: Tamura
authors.forename: K
authors.initials: K
authors.lastname: Kawada
authors.forename: M
authors.initials: M
authors.lastname: Matsumoto
authors.forename: R
authors.initials: R
authors.lastname: Suzuki
authors.forename: K
authors.initials: K
authors.lastname: Kuwabara
authors.forename: Y
authors.initials: Y
authors.lastname: Hori
authors.forename: M
authors.initials: M
authors.lastname: Ohtani
mesh_terms: D000818:Animals; D000917:Antibody Formation / Q000187:drug effects; D001169:Arthritis, Experimental / Q000188:drug therapy / Q000276:immunology; D001172:Arthritis, Rheumatoid / Q000188:drug therapy* / Q000276:immunology; D001402:B-Lymphocytes / Q000187:drug effects; D005260:Female; D005461:Fluorine / Q000378:metabolism*; D005493:Folic Acid Antagonists / Q000138:chemical synthesis*; D008727:Methotrexate / Q000031:analogs & derivatives* / Q000627:therapeutic use; D051379:Mice; D008956:Models, Chemical; D051381:Rats; D011917:Rats, Inbred Lew; D013237:Stereoisomerism; D013601:T-Lymphocytes / Q000187:drug effects
chemical_list: D005493:Folic Acid Antagonists; D005461:Fluorine; D008727:Methotrexate