Poly(amino acid) based fibrous membranes with tuneable in vivo biodegradation

Molnár, Kristóf and Voniatis, Constantinos and Fehér, Daniella and SZABÓ, GYÖRGYI and Varga, Rita and Reiniger, Lilla and Juriga, Dávid and Kiss, Zoltan and Krisch, Enikő and Wéber, György and Ferencz, Andrea and Varga, Gabor and Zrínyi, Miklós and S. Nagy, Krisztina and Jedlovszky-Hajdú, Angéla (2021) Poly(amino acid) based fibrous membranes with tuneable in vivo biodegradation. PLOS ONE. ISSN 1932-6203

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Abstract

In this work two types of biodegradable polysuccinimide-based, electrospun fibrous membranes are presented. One contains disulfide bonds exhibiting a shorter (3 days) in vivo biodegradation time, while the other one has alkyl crosslinks and a longer biodegradation time (more than 7 days). According to the mechanical measurements, the tensile strength of the membranes is comparable to those of soft the connective tissues and visceral tissues. Furthermore, the suture retention test suggests, that the membranes would withstand surgical handling and in vivo fixation. The in vivo biocompatibility study demonstrates how membranes undergo in vivo hydrolysis and by the 3rd day they become poly(aspartic acid) fibrous membranes, which can be then enzymatically degraded. After one week, the disulfide crosslinked membranes almost completely degrade, while the alkyl-chain crosslinked ones mildly lose their integrity as the surrounding tissue invades them. Histopathology revealed mild acute inflammation, which diminished to a minimal level after seven days.

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