Silk biomaterials and methods of use thereof

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 89/00 (2006.01) C12N 5/071 (2010.01) A61L 27/22 (2006.01) A61L 27/38 (2006.01) A61L 27/54 (2006.01) C08J 5/18 (2006.01) C08L 71/02 (2006.01) D01F 8/02 (2006.01) C07K 14/435 (2006.01)

Patent

CA 2525994

The present invention provides an all-aqueous process and composition for production of silk biomaterials, e.g., fibers, films, foams and mats. In the process, at least one biocompatible polymer, such as poly(ethylene oxide) (PEO) (a well-documented biocompatible material), was blended with the silk protein prior to processing e.g., electrospinning. We discovered that this step avoids problems associated with conformational transitions of fibroin during solubilization and reprocessing from aqueous solution which lead to embrittled materials. Moreover, the process avoids the use of organic solvents that can pose problems when the processed biomaterials are exposed to cells in vitro or in vivo.

L'invention concerne un procédé complètement aqueux et une composition permettant de produire des biomatériaux à base de soie, par exemple, des fibres, des films, des mousses et des mats. Dans ce procédé, au moins un polymère biocompatible, tel qu'un poly(éthylène oxyde) (PEO) (matériau biocompatible bien documenté), à été mélangé avec une protéine de soie avant un traitement, par exemple, un électrofilage. On a découvert que cette étape évitait les problèmes associés aux transitions conformationnelles d'une fibroïne pendant la solubilisation et le retraitement de la solution aqueuse qui entraînent une fragilisation des matériaux. Ce procédé évite, en outre, l'utilisation de solvants organiques pouvant poser des problèmes lorsque les biomatériaux sont exposés à des cellules in vitro et in vivo.

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