Journal
CHEMMEDCHEM
Volume 11, Issue 22, Pages 2474-2495Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cmdc.201600374
Keywords
biopharmaceuticals; drug delivery; half-life extension; peptides; proteins
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Peptides and proteins constitute a vast pool of excellent drug candidates. Evolution has equipped these molecules with superior drug-like properties such as high specificity and potency. However, native peptides and proteins suffer from an inadequate pharmacokinetic profile, and their outstanding pharmacological potential can only be realized if this issue is addressed during drug development. To overcome this challenge, a variety of half-life extension techniques relying on covalent chemical modification have been developed. These methods include PEGylation, fusion to unstructured polypeptide-based PEG mimetics, conjugation of large polysaccharides, native-like glycosylation, lipidation, fusion to albumin or the Fc domain of IgG, and derivatization with bio-orthogonal moieties that direct self-assembly. This review provides an overview of available conjugation chemistries, biophysical properties, and safety data associated with these concepts. Moreover, the effects of these modifications on peptide and protein pharmacokinetics are demonstrated through key examples.
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