Carboxylated-xyloglucan and peptide amphiphile co-assembly in wound healing

Ajovalasit, Alessia; Redondo-Gómez, Carlos; Sabatino, Maria Antonietta; Okesola, Babatunde O.; Braun, Kristin; Mata, Alvaro; Dispenza, Clelia

Abstract

Hydrogel wound dressings can play critical roles in wound healing protecting the wound from trauma or contamination and providing an ideal environment to support the growth of endogenous cells and promote wound closure. This work presents a self-assembling hydrogel dressing that can assist the wound repair process mimicking the hierarchical structure of skin extracellular matrix. To this aim, the co-assembly behaviour of a carboxylated variant of xyloglucan (CXG) with a peptide amphiphile (PA-H3) has been investigated to generate hierarchical constructs with tuneable molecular composition, structure, and properties. Transmission electron microscopy and circular dichroism at a low concentration shows that CXG and PA-H3 co-assemble into nanofibres by hydrophobic and electrostatic interactions and further aggregate into nanofibre bundles and networks. At a higher concentration, CXG and PA-H3 yield hydrogels that have been characterized for their morphology by scanning electron microscopy and for the mechanical properties by small-amplitude oscillatory shear rheological measurements and compression tests at different CXG/PAH3 ratios. A preliminary biological evaluation has been carried out both in vitro with HaCat cells and in vivo in a mouse model.

Citation

Ajovalasit, A., Redondo-Gómez, C., Sabatino, M. A., Okesola, B. O., Braun, K., Mata, A., & Dispenza, C. (2021). Carboxylated-xyloglucan and peptide amphiphile co-assembly in wound healing. Regenerative Biomaterials, 8(5), Article rbab040. https://doi.org/10.1093/rb/rbab040

• Journal Article Type: Article
• Acceptance Date: Jun 23, 2021
• Online Publication Date: Aug 11, 2021
• Publication Date: 2021-10
• Deposit Date: Oct 20, 2021
• Publicly Available Date: Oct 21, 2021
• Journal: Regenerative Biomaterials
• Print ISSN: 2056-3418
• Electronic ISSN: 2056-3426
• Publisher: Oxford University Press
• Peer Reviewed: Peer Reviewed
• Volume: 8
• Issue: 5
• Article Number: rbab040
• DOI: https://doi.org/10.1093/rb/rbab040
• Keywords: Biomaterials
• Public URL: https://nottingham-repository.worktribe.com/output/6504890
• Publisher URL: https://academic.oup.com/rb/article/8/5/rbab040/6347703