title: Pharmaceutical development of a parenteral lyophilized formulation of the antimetastatic ruthenium complex NAMI-A.
abstract: This paper describes the development of a stable pharmaceutical dosage form for NAMI-A, a novel antimetastatic ruthenium complex, for Phase I testing. NAMI-A drug substance was characterized using several spectrometric and chromatographic techniques. In preformulation studies, it was found that NAMI-A in aqueous solution was not stable enough to allow sterilization by moist heat. The effect of several excipients on the stability of the formulation solution was investigated. None of them provided sufficient stability to allow long-term storage of an aqueous solution of NAMI-A. Therefore, a lyophilized product was developed. Five different formulations were prepared and subjected to thermogravimetric (TG) analysis and stability studies at various conditions for 1 year. Minimal degradation during the production process is achieved with a formulation solution of pH 3-4. Of the acids tested, only hydrochloric acid (HCl 0.1 mM) both stabilized the formulation solution and was compatible with the lyophilized product. This product was stable for at least 1 year when stored at -20 degrees C, 25 degrees C/60% relative humidity (RH) and 40 degrees C/75% RH, and was also photostable.
authors.affiliation: Department of Pharmacy and Pharmacology, Slotervaart Hospital/The Netherlands Cancer Institute, Louwesweg 6, 1066 EC Amsterdam, The Netherlands. apmbo@slz.nl
authors.forename: M
authors.initials: M
authors.lastname: Bouma
authors.forename: B
authors.initials: B
authors.lastname: Nuijen
authors.forename: G
authors.initials: G
authors.lastname: Sava
authors.forename: A
authors.initials: A
authors.lastname: Perbellini
authors.forename: A
authors.initials: A
authors.lastname: Flaibani
authors.forename: M J
authors.initials: MJ
authors.lastname: van Steenbergen
authors.forename: H
authors.initials: H
authors.lastname: Talsma
authors.forename: J J
authors.initials: JJ
authors.lastname: Kettenes-van den Bosch
authors.forename: A
authors.initials: A
authors.lastname: Bult
authors.forename: J H
authors.initials: JH
authors.lastname: Beijnen
mesh_terms: D000970:Antineoplastic Agents / Q000008:administration & dosage / Q000737:chemistry* / Q000493:pharmacokinetics; D002626:Chemistry, Pharmaceutical; D004121:Dimethyl Sulfoxide / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000737:chemistry* / Q000493:pharmacokinetics; D005612:Freeze Drying; D007263:Infusions, Parenteral; D009362:Neoplasm Metastasis / Q000517:prevention & control*; D009942:Organometallic Compounds / Q000008:administration & dosage / Q000737:chemistry* / Q000493:pharmacokinetics; D012428:Ruthenium / Q000008:administration & dosage / Q000737:chemistry / Q000493:pharmacokinetics; D017975:Ruthenium Compounds; D013678:Technology, Pharmaceutical / Q000379:methods*
chemical_list: D000970:Antineoplastic Agents; D009942:Organometallic Compounds; D017975:Ruthenium Compounds; C113661:imidazolium-bis(imidazole)dimethylsulfoxideimidazotetrachlororuthenate(III); D012428:Ruthenium; D004121:Dimethyl Sulfoxide