Carrier Design: Biodistribution of Branched Polypeptides with a Poly(L-lysine) Backbone

J. A. Clegg, F. Hudecz, G. Mezö, M. V. Pimm, M. Szekerke, R. W. Baldwin

Research output: Contribution to journalArticle

45 Citations (Scopus)


The biodistribution has been examined in mice of a range of synthetic branched polypeptides which are based on a polylysine backbone but which differ in ionic charge, side-chain structure, and molecular size. Polycationic polypeptides, regardless of their size or primary structure at the branches, were cleared rapidly from the circulation, the liver being the major site of clearance. Polypeptides with glutamic acid in the side chain, which would be amphoteric under physiological conditions, showed a significantly prolonged blood survival, and this was seen with polypeptides in the range of molecular weights of 46 000 up to 213 000. Such polypeptides provide a useful system with which to investigate the effect of structural parameters on the pharmacokinetic properties of carrier molecules and would allow the selection of candidate carriers for a variety of uses.

Original languageEnglish
Pages (from-to)425-430
Number of pages6
JournalBioconjugate Chemistry
Issue number6
Publication statusPublished - Nov 1 1990

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Biomedical Engineering
  • Pharmacology
  • Pharmaceutical Science
  • Organic Chemistry

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