Title
Electrospun fibrous mats from a l-phenylalanine based poly(ester amide): Drug delivery and accelerated degradation by loading enzymes
Date Issued
10 July 2015
Access level
metadata only access
Resource Type
journal article
Author(s)
Murase S.
Kobauri S.
Katsarava R.
Puiggalí J.
Universitat Politècnica de Catalunya
Publisher(s)
Elsevier Ltd
Abstract
Abstract Fibrous mats from an α-amino acid based poly(ester amide) have been prepared due to the potential applications of this kind of polymers in the biomedical field thanks to the expected non-toxicity of their degradation products. Specifically, the electrospinning technique has been applied and both solution properties and operational parameters have been optimized to get continuous fibers in the micrometer range. Furthermore, fibrous mats have been loaded with biguanide compounds differing on molecular size but having a well-proved bactericide activity (i.e., chlorhexidine, CHX and polyhexamethylenebiguanide, PHMB). The high solubility of the poly(ester amide) constituted by l-phenylalanine, adipic acid and 1,4-butanediol also allowed getting appropriate electrospinning conditions to incorporate degrading enzymes like α-chymotrypsin without significant denaturation. Degradability of fibrous mats has been evaluated in distinct enzymatic media (lipase, proteinase K and α-chymotrypsin) being found a similar behavior that contrasts with the significant differences detected when film samples were employed. An accelerated degradation was clearly found for fibrous mats loaded with α-chymotrypsin even when they were exposed to a non-enzymatic aqueous medium. Release of bactericide agents was evaluated and a specific delay was determined when the polymeric biguanide was employed. Nevertheless, PHMB showed a clearly enhanced activity. Biocompatibility of the new fibrous mats was verified being also determined an increase on the cell adhesion with respect to film samples as a consequence of the increased porosity.
Start page
275
End page
287
Volume
119
Language
English
OCDE Knowledge area
Farmacología, Farmacia Ingeniería química
Scopus EID
2-s2.0-84936888380
Source
Polymer Degradation and Stability
ISSN of the container
01413910
Sponsor(s)
Generalitat de Catalunya 2014SGR188
Sources of information: Directorio de Producción Científica Scopus