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|Title:||Tumor growth suppression induced by biomimetic silk fibroin hydrogels|
Ribeiro, Viviana Pinto
Gonçalves, Vera Mónica Miranda
Morais, Alain José Silva
Sousa, Rui A.
Reis, R. M.
Oliveira, Ana Leite Almeida Monteiro
Oliveira, J. M.
Reis, R. L.
|Publisher:||Nature Publishing Group|
|Citation:||Yan L. P., Silva-Correia J., Ribeiro V. P., Miranda-Gonçalves V., Correia C., da Silva Morais A., Sousa R. A., Reis R. M., Oliveira A. L., Oliveira J. M., Reis R. L. Tumor Growth Suppression Induced by Biomimetic Silk Fibroin Hydrogels, Scientific Reports, Vol. 6, Issue 31037, doi:10.1038/srep31037, 2016|
|Abstract(s):||Protein-based hydrogels with distinct conformations which enable encapsulation or differentiation of cells are of great interest in 3D cancer research models. Conformational changes may cause macroscopic shifts in the hydrogels, allowing for its use as biosensors and drug carriers. In depth knowledge on how 3D conformational changes in proteins may affect cell fate and tumor formation is required. Thus, this study reports an enzymatically crosslinked silk fibroin (SF) hydrogel system that can undergo intrinsic conformation changes from random coil to Î²-sheet conformation. In random coil status, the SF hydrogels are transparent, elastic, and present ionic strength and pH stimuli-responses. The random coil hydrogels become Î²-sheet conformation after 10 days in vitro incubation and 14 days in vivo subcutaneous implantation in rat. When encapsulated with ATDC-5 cells, the random coil SF hydrogel promotes cell survival up to 7 days, whereas the subsequent Î²-sheet transition induces cell apoptosis in vitro. HeLa cells are further incorporated in SF hydrogels and the constructs are investigated in vitro and in an in vivo chick chorioallantoic membrane model for tumor formation. In vivo, Angiogenesis and tumor formation are suppressed in SF hydrogels. Therefore, these hydrogels provide new insights for cancer research and uses of biomaterials.|
|Appears in Collections:||3B’s - Artigos em revistas/Papers in scientific journals|