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Spectrochim Acta A Mol Biomol Spectrosc ; 251: 119420, 2021 Apr 15.
Artigo em Inglês | MEDLINE | ID: mdl-33465575

RESUMO

Collagen nanofibers are popular extracellular matrix (ECM) materials in regenerative medicine. Electrospinning of collagen dissolved in organic solvents is widely used for fabricating anisotropic collagen nanofibers; however, such fibers are water-soluble and require cross-linking before use as scaffolds for cell culture. Herein, in-situ crosslinking during electrospinning process is suggested by using different chemical agents, namely genipin and glutaraldehyde, and physical crosslinking method (UV light). sFTIRM; Synchrotron Fourier-Transform Infrared Microspectroscopy is a powerful tool that sheds light on the molecular structure of collagen nanofibers. Applied extraction methods caused shifts on protein band positions. Electrospinning process prevents self-assembly of collagen molecules and obtained electrospun collagen nanofibers have lower band positions. Crosslinkers have effect on the secondary structure of collagen molecules. Among different crosslinkers, genipin in-situ crosslinking process perform better in preserving the native structure of electrospun collagen nanofibers than the physical crosslinking method (UV).

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