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Site Directed Disulfide Pegylation of Interferon-Β-1B With Fork Peptide Linker Publisher Pubmed



Abbasi S1, 2 ; Farahani H3 ; Lanjanian H1 ; Taheri M2 ; Firoozpour L4 ; Davoodi J1 ; Pirkalkhoran S5 ; Riazi G1 ; Pooyan S1, 2
Authors
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Authors Affiliations
  1. 1. Institute of Biochemistry and Biophysics, University of Tehran, PO Code 1417614335, Tehran, Iran
  2. 2. Rooyan Darou Pharmaceutical Company, PO Code 15996-89111, Tehran, Iran
  3. 3. Department of Microbiology, School of Biology, Faculty of Science, University of Tehran, PO Code 1417466191, Tehran, Iran
  4. 4. Department of Medicinal Chemistry, Faculty of Pharmacy, Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, PO Code 14174, Tehran, Iran
  5. 5. Department of Biology, Faculty of Basic Science, Islamic Azad University, Central Tehran Branch, PO Code 1477893855, Tehran, Iran

Source: Bioconjugate Chemistry Published:2020


Abstract

The attachment of PEG to biopharmaceuticals has been applied for enhancement of bioavailability and improved stability. The PEG polymer is highly hydrated; thus effective attachment to inaccessible sites could be hindered. We have devised a scheme to address this issue by introducing a considerable distance between PEG and protein by addition of a linear peptide, appended to long chained reactive linkers. Second, the position of PEG conjugation directly affects biological activity. Accordingly, a disulfide bond could be considered as an ideal choice for site directed PEGylation; but reactivity of both thiol moieties to bridging reagent is critical for maintenance of protein structure. In our design, a forked structure with two arms provides essential flexibility to account for dissociation of reduced cysteines. An efficient yield for disulfide PEGylation of IFN-β1b was attained and specificity, biophysical characterization, biological activity, and pharmacokinetics were surveyed. Copyright © 2020 American Chemical Society.
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