Prodrugs of gestodene for matrix-type transdermal drug delivery systems. 1998

R Lipp, and H Laurent, and C Günther, and J Riedl, and P Esperling, and U Täuber
Research Laboratories of Schering AG, Berlin, Germany. ralph.lipp@schering.de

OBJECTIVE The aim of this study was to enhance the transdermal absorption of the highly active progestin gestodene from matrix type transdermal delivery systems (TDDS) by formation of prodrugs with improved matrix solubility. METHODS Gestodene esters were synthesized via acylation of the drug with the respective carboxylic anhydrides. Subsequently TDDS were produced using the solvent cast method. Selected formulations were examined with in vitro diffusion experiments using skin of nude mice. RESULTS One prodrug, gestodene caproate proved to be an oil at ambient temperature and showed a very high solubilty of over 10.5% in the TDDS matrix. Within in vitro penetration studies using those systems the prodrug exhibited a significantly higher transdermal penetration rate than gestodene from reference systems. Furthermore, the prodrug was hydrolyzed to the parent drug to a high extent during the passage of the skin. CONCLUSIONS Designing prodrugs to the requirements of matrix TDDS is an efficient way of enhancing the transdermal drug flux rate.

UI MeSH Term Description Entries
D008297 Male Males
D008819 Mice, Nude Mutant mice homozygous for the recessive gene "nude" which fail to develop a thymus. They are useful in tumor studies and studies on immune responses. Athymic Mice,Mice, Athymic,Nude Mice,Mouse, Athymic,Mouse, Nude,Athymic Mouse,Nude Mouse
D009652 Norpregnenes Pregnenes with one double bond or more than three double bonds which have undergone ring contractions or are lacking carbon-18 or carbon-19..
D011355 Prodrugs A compound that, on administration, must undergo chemical conversion by metabolic processes before becoming the pharmacologically active drug for which it is a prodrug. Drug Precursor,Drug Precursors,Pro-Drug,Prodrug,Pro-Drugs,Precursor, Drug,Precursors, Drug,Pro Drug,Pro Drugs
D003280 Contraceptives, Oral, Synthetic Oral contraceptives which owe their effectiveness to synthetic preparations.
D003460 Crystallization The formation of crystalline substances from solutions or melts. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed) Crystalline Polymorphs,Polymorphism, Crystallization,Crystal Growth,Polymorphic Crystals,Crystal, Polymorphic,Crystalline Polymorph,Crystallization Polymorphism,Crystallization Polymorphisms,Crystals, Polymorphic,Growth, Crystal,Polymorph, Crystalline,Polymorphic Crystal,Polymorphisms, Crystallization,Polymorphs, Crystalline
D004356 Drug Storage The process of keeping pharmaceutical products in an appropriate location. Drug Storages,Storage, Drug,Storages, Drug
D005866 Gestonorone Caproate A long-acting potent progestogen structurally related to PROGESTERONE. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1185) Depostat,Gestronol,Gestronol Hexanoate,Primostat,Caproate, Gestonorone,Hexanoate, Gestronol
D000215 Acylation The addition of an organic acid radical into a molecule.
D000279 Administration, Cutaneous The application of suitable drug dosage forms to the skin for either local or systemic effects. Cutaneous Drug Administration,Dermal Drug Administration,Drug Administration, Dermal,Percutaneous Administration,Skin Drug Administration,Transcutaneous Administration,Transdermal Administration,Administration, Dermal,Administration, Transcutaneous,Administration, Transdermal,Cutaneous Administration,Cutaneous Administration, Drug,Dermal Administration,Drug Administration, Cutaneous,Skin Administration, Drug,Administration, Cutaneous Drug,Administration, Dermal Drug,Administration, Percutaneous,Administrations, Cutaneous,Administrations, Cutaneous Drug,Administrations, Dermal,Administrations, Dermal Drug,Administrations, Percutaneous,Administrations, Transcutaneous,Administrations, Transdermal,Cutaneous Administrations,Cutaneous Administrations, Drug,Cutaneous Drug Administrations,Dermal Administrations,Dermal Drug Administrations,Drug Administrations, Cutaneous,Drug Administrations, Dermal,Drug Skin Administrations,Percutaneous Administrations,Skin Administrations, Drug,Skin Drug Administrations,Transcutaneous Administrations,Transdermal Administrations

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