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- W4285809080 endingPage "122031" @default.
- W4285809080 startingPage "122031" @default.
- W4285809080 abstract "Peptides have great potential to be potent and specific therapeutics, yet their small size leads to rapid glomerular filtration, which severely limits therapeutic applications. Although conjugation of small proteins to large polymers typically results in longer residence times, these conjugates often have a significant loss of biological activity due to steric hindrance. Here, we improve the pharmacokinetics (PK) of peptide therapeutics by harnessing the biology of vitamin D. Attachment of a small vitamin D-based molecule (D-VITylation) protects the conjugated peptide or protein from renal clearance by virtue of reversible binding to the serum-circulating vitamin D binding protein (DBP), without compromising bioactivity. Varying the conjugation site on vitamin D affects the binding to DBP, with higher affinity corresponding to a longer plasma half-life. We also demonstrate the important contribution of the peptide to the overall PK, likely due to alternative clearance mechanisms such as protease degradation and receptor-mediated cellular uptake. With a Fab antibody fragment, for which these alternate clearance mechanisms are not significant, D-VITylation increases the half-life of elimination from 14 to 61 h in rats. The PK profile in minipigs and projected lifetime in humans suggest that D-VITylation is a viable strategy to achieve once-weekly dosing of peptide therapeutics in humans." @default.
- W4285809080 created "2022-07-19" @default.
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- W4285809080 date "2022-08-01" @default.
- W4285809080 modified "2023-10-09" @default.
- W4285809080 title "D-VITylation: Harnessing the biology of vitamin D to improve the pharmacokinetic properties of peptides and small proteins" @default.
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- W4285809080 doi "https://doi.org/10.1016/j.ijpharm.2022.122031" @default.
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