Activating an adaptive immune response from a hydrogel scaffold imparts regenerative wound healing

Donald R. Griffin, Maani M. Archang, Chen Hsiang Kuan, Westbrook M. Weaver, Jason S. Weinstein, An Chieh Feng, Amber Ruccia, Elias Sideris, Vasileios Ragkousis, Jaekyung Koh, Maksim V. Plikus, Dino Di Carlo, Tatiana Segura, Philip O. Scumpia

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Microporous annealed particle (MAP) scaffolds are flowable, in situ crosslinked, microporous scaffolds composed of microgel building blocks and were previously shown to accelerate wound healing. To promote more extensive tissue ingrowth before scaffold degradation, we aimed to slow MAP degradation by switching the chirality of the crosslinking peptides from l- to d-amino acids. Unexpectedly, despite showing the predicted slower enzymatic degradation in vitro, d-peptide crosslinked MAP hydrogel (d-MAP) hastened material degradation in vivo and imparted significant tissue regeneration to healed cutaneous wounds, including increased tensile strength and hair neogenesis. MAP scaffolds recruit IL-33 type 2 myeloid cells, which is amplified in the presence of d-peptides. Remarkably, d-MAP elicited significant antigen-specific immunity against the d-chiral peptides, and an intact adaptive immune system was required for the hydrogel-induced skin regeneration. These findings demonstrate that the generation of an adaptive immune response from a biomaterial is sufficient to induce cutaneous regenerative healing despite faster scaffold degradation.

Original languageEnglish (US)
Pages (from-to)560-569
Number of pages10
JournalNature materials
Volume20
Issue number4
DOIs
StatePublished - Apr 2021

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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