Title
Efficient protein incorporation and release by a jigsaw-shaped self-assembling peptide hydrogel for injured brain regeneration
Author
Atsuya Yaguchi, Mio Oshikawa, Go Watanabe, Hirotsugu Hiramatsu, Noriyuki Uchida, Chikako Hara, Naoko Kaneko, Kazunobu Sawamoto, Takahiro Muraoka & Itsuki Ajioka
Year
2021
Journal
Nature Communications
Abstract
During injured tissue regeneration, the extracellular matrix plays a key role in controlling and coordinating various cellular events by binding and releasing secreted proteins in addition to promoting cell adhesion. Herein, we develop a cell-adhesive fiber-forming peptide that mimics the jigsaw-shaped hydrophobic surface in the dovetail-packing motif of glycophorin A as an artificial extracellular matrix for regenerative therapy. We show that the jigsaw-shaped self-assembling peptide forms several-micrometer-long supramolecular nanofibers through a helix-to-strand transition to afford a hydrogel under physiological conditions and disperses homogeneously in the hydrogel. The molecular- and macro-scale supramolecular properties of the jigsaw-shaped self-assembling peptide hydrogel allow efficient incorporation and sustained release of vascular endothelial growth factor, and demonstrate cell transplantation-free regenerative therapeutic effects in a subacute-chronic phase mouse stroke model. This research highlights a therapeutic strategy for injured tissue regeneration using the jigsaw-shaped self-assembling peptide supramolecular hydrogel.
Full Article
Instrument
LC-4000, J-1100, FT/IR-6100
Keywords
tissue, regeneration, proteins, peptides, supermolecular, nanofibers