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Silk fibroin hydrogels for potential applications in photodynamic therapy

Rojas, JEU, Gerbelli, BB, Ribeiro, AO, Nantes-Cardoso, IL, Giuntini, F and Alves, WA (2018) Silk fibroin hydrogels for potential applications in photodynamic therapy. Biopolymers, 110 (2). ISSN 0006-3525

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In this study, we prepared translucid hydrogels with different concentrations of silk fibroin, extracted from raw silk fibers, and used them as a matrix to incorporate the photosensitizer 5-(4-aminophenyl)-10,15,20-tris-(4-sulphonatophenyl) porphyrin trisodium for application in photodynamic therapy (PDT). The hydrogels obtained were characterized by rheology, spectrophotometry, and scattering techniques to elucidate the factors involved in the formation of the hydrogel, and to characterize the behavior of silk fibroin (SF) after incorporating of the porphyrin to the matrix. The rheology results demonstrated that the SF hydrogels had a shear thinning behavior. In addition, we were able to verify that the structure of the material was able to be recovered over time after shear deformation. The encapsulation of porphyrins in hydrogels leads to the formation of self-assembled peptide nanostructures that prevent porphyrin aggregation, thereby greatly increasing the generation of singlet oxygen. Also, our findings suggest that porphyrin can diffuse out of the hydrogel and permeate the outer skin layers. This evidence suggests that SF hydrogels could be used as porphyrin encapsulation and as a drug carrier for the sustained release of photosensitizers for PDT.

Item Type: Article
Uncontrolled Keywords: 03 Chemical Sciences, 06 Biological Sciences
Subjects: R Medicine > RM Therapeutics. Pharmacology
Divisions: Pharmacy & Biomolecular Sciences
Publisher: Wiley
Related URLs:
Date Deposited: 16 Feb 2022 11:57
Last Modified: 16 Feb 2022 12:00
DOI or ID number: 10.1002/bip.23245
URI: https://researchonline.ljmu.ac.uk/id/eprint/11572
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