Synthetic 3D PEG-Anisogel Tailored with Fibronectin Fragments Induce Aligned Nerve Extension.

Abstract:

:An enzymatically cross-linked polyethylene glycol (PEG)-based hydrogel was engineered to promote and align nerve cells in a three-dimensional manner. To render the injectable, otherwise bioinert, PEG-based material supportive for cell growth, its mechanical and biochemical properties were optimized. A recombinant fibronectin fragment (FNIII9*-10/12-14) was coupled to the PEG backbone during gelation to provide cell adhesive and growth factor binding domains in close vicinity. Compared to full-length fibronectin, FNIII9*-10/12-14 supports nerve growth at similar concentrations. In a 3D environment, only the ultrasoft 1 w/v% PEG hydrogels with a storage modulus of ∼10 Pa promoted neuronal growth. This gel was used to establish the first fully synthetic, injectable Anisogel by the addition of magnetically aligned microelements, such as rod-shaped microgels or short fibers. The Anisogel led to linear neurite extension and represents a large step in the direction of clinical translation with the opportunity to treat acute spinal cord injuries.

journal_name

Biomacromolecules

journal_title

Biomacromolecules

authors

Licht C,Rose JC,Anarkoli AO,Blondel D,Roccio M,Haraszti T,Gehlen DB,Hubbell JA,Lutolf MP,De Laporte L

doi

10.1021/acs.biomac.9b00891

subject

Has Abstract

pub_date

2019-11-11 00:00:00

pages

4075-4087

issue

11

eissn

1525-7797

issn

1526-4602

journal_volume

20

pub_type

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