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The Medicinal Chemistry of Peptides

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Abstract:

The shortcomings of native peptides as pharmaceuticals have been long known: short duration of action, lack of receptor selectivity, lack of oral bioavailability. However medicinal chemistry offers solutions to the first two limitations and oral bioavailability issues have been addressed with novel routes of administration (e.g. intranasal, inhalation) and injectable depot formulations. The principal issue for peptide drugs has been a short duration of action, widely assumed to be due to proteolysis. While proteolysis is a problem for native peptide structures, modification of the peptide structure by acylation, PEGylation, unnatural amino acids or restricted conformation can largely remove this issue. However rapid clearance from the blood into the urine remains an issue for even proteolytically stable molecules. Medicinal chemistry approaches here have been peptide modifications to slow release from the injection site (hydrophobic, hydrophilic, selfassociating depots), PEGylation, fatty acid acylation, and the like. Medicinal chemistry approaches used in successful peptide pharmaceuticals using unnatural amino acids to achieve depot formation are highlighted in this review.

Keywords: Peptide; constrained peptide; drug depot; drug design; medicinal chemistry; peptide design; peptide pharmaceutical; pharmacodynamics; pharmacokinetics

Document Type: Research Article

DOI: https://doi.org/10.2174/092986709789712907

Affiliations: EuMederis Pharmaceuticals, Inc., 725 Lynwood Drive, Encinitas, California 92024, USA.

Publication date: 2009-11-01

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  • Current Medicinal Chemistry covers all the latest and outstanding developments in medicinal chemistry and rational drug design. Each issue contains a series of timely in-depth reviews written by leaders in the field covering a range of the current topics in medicinal chemistry. Current Medicinal Chemistry is an essential journal for every medicinal chemist who wishes to be kept informed and up-to-date with the latest and most important developments.
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