Designing cell-aggregating peptides without cytotoxicity.

Abstract:

:We have designed α-helical peptides de novo that can induce aggregation of various kinds of cells by focusing on physicochemical properties such as hydrophobicity, net charges, and amphipathicity. It is shown that peptide hydrophobicity is the key factor to determine capabilities for cell aggregation while peptide net charges contribute to nonspecific electrostatic interactions with cells. On the other hand, amphipathic peptides tend to exhibit cytotoxicity such as antimicrobial activity and hemolysis, which are competitive with cell-aggregation capabilities. Different from the cases of living cells, aggregation of artificial anionic liposomes appears to be mainly determined by electrostatic interactions. This discrepancy might be due to the complex structure of surfaces of cell membranes consisting of macromolecular chains such as peptidoglycans, polysaccharides, or glycocalyx, which coexist with lipid bilayers. Our design strategy would pave the way to design peptides that lead aggregation of living cells without cytotoxicity.

journal_name

Biomacromolecules

journal_title

Biomacromolecules

authors

Yamamoto N,Tamura A

doi

10.1021/bm4014414

subject

Has Abstract

pub_date

2014-02-10 00:00:00

pages

512-23

issue

2

eissn

1525-7797

issn

1526-4602

journal_volume

15

pub_type

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