Decoupling the effects of hydrophilic and hydrophobic moieties at the neuron-nanofibre interface

Adam D. Martin*, Jonathan P. Wojciechowski, Eric Y. Du, Aditya Rawal, Holly Stefen, Carol G. Au, Liming Hou, Charles G. Cranfield, Thomas Fath, Lars M. Ittner, Pall Thordarson

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Citations (Scopus)
2 Downloads (Pure)

Abstract

Peptide-based nanofibres are a versatile class of tunable materials with applications in optoelectronics, sensing and tissue engineering. However, the understanding of the nanofibre surface at the molecular level is limited. Here, a series of homologous dilysine-diphenylalnine tetrapeptides were synthesised and shown to self-assemble into water-soluble nanofibres. Despite the peptide nanofibres displaying similar morphologies, as evaluated through atomic force microscopy and neutron scattering, significant differences were observed in their ability to support sensitive primary neurons. Contact angle and labelling experiments revealed that differential presentation of lysine moieties at the fibre surface did not affect neuronal viability; however the mobility of phenylalanine residues at the nanofibre surface, elucidated through solid- and gel-state NMR studies and confirmed through tethered bilayer lipid membrane experiments, was found to be the determining factor in governing the suitability of a given peptide as a scaffold for primary neurons. This work offers new insights into characterising and controlling the nanofibre surface at the molecular level.

Original languageEnglish
Pages (from-to)1375-1382
Number of pages8
JournalChemical Science
Volume11
Issue number5
DOIs
Publication statusPublished - 7 Feb 2020

    Fingerprint

Bibliographical note

Copyright the Publisher 2020. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Cite this