Abstract

With rapidly growing interest in therapeutic macromolecules, targeted drug delivery, and in vivo biosensing comes the need for new nanostructured biomaterials capable of macromolecule storage and metered release that exhibit robust stability and cytocompatibility. One novel possibility for such a material are engineered large-pore protein crystals (LPCs). Here, various chemically stabilized LPC derived biomaterials were generated using three cross-linking agents: glutaraldehyde, oxaldehyde, and 1-ethyl-3-(3-(dimethylamino)propyl)carbodiimide. LPC biostability and in vitro mammalian cytocompatibility was subsequently evaluated and compared to similarly cross-linked tetragonal hen egg white lysozyme crystals. This study demonstrates the ability of various cross-linking chemistries to physically stabilize the molecular structure of LPC materials-increasing their tolerance to challenging conditions while exhibiting minimal cytotoxicity. This approach produces LPC-derived biomaterials with promising utility for diverse applications in biotechnology and nanomedicine.

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