Cellular uptake of IgG using collagen-like cell-penetrating peptides

Ryo Masuda*, Kazuhiro Yamamoto, Takaki Koide

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Cell-penetrating peptides (CPPs) are attractive tools for delivering macromolecules that have poor membrane permeability, such as antibodies, into cells. However, the major drawback of conventional CPPs is their instability in bodily fluids. We previously reported a novel CPP employing a collagen-like triple-helical structure that exhibited remarkable resistance against serum proteases. Herein, we report the delivery of full-length immunoglobulin G (IgG) antibody into cells using a triple-helical CPP. The CPP was conjugated to IgG via a one-pot reaction using 2-iminothiolane as a crosslinking reagent. The triple-helical CPP was less prone to being aggregated and neutralized by serum than was octaarginine, a conventional CPP. However, most of the conjugates were found to be entrapped in endosomes.

Original languageEnglish
Pages (from-to)130-134
Number of pages5
JournalBiological and Pharmaceutical Bulletin
Issue number1
Publication statusPublished - 2016 Jan 1


  • Antibody delivery
  • Cell-penetrating peptide
  • Collagen-like peptide
  • Peptide conjugation

ASJC Scopus subject areas

  • Pharmacology
  • Pharmaceutical Science


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