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Removal of Retained Electrospinning Solvent Prolongs Drug Release from Electrospun PLLA Fibers.


ABSTRACT: A major challenge in developing drug-releasing electrospun nanofibers is obtaining long-term drug release over many weeks with no burst release of drug. Here, we present new methods capable of prolonging the diffusive release of small molecule drugs from electrospun poly-L-lactic acid (PLLA) nanofibers. The methods focus on removal of retained electrospinning solvent through fiber heating, maintaining fibers in a laboratory setting, or a combination of these methods. These post-fabrication methods altered the release characteristics of a model small molecule drug, 6-aminonicotinamide (6AN), from PLLA fibers. Specifically, untreated fibers released 6AN over 9 days, and fibers that underwent a combined treatment of maintenance in a laboratory setting and heating released 6AN over 44 days. The unique and simple method presented here prolongs diffusive release of a small molecule drug from electrospun fibers and has potential to assist in lengthening small molecule drug release from a variety of polymeric nanomaterials.

SUBMITTER: D'Amato AR 

PROVIDER: S-EPMC5708548 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature

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Removal of Retained Electrospinning Solvent Prolongs Drug Release from Electrospun PLLA Fibers.

D'Amato Anthony R AR   Schaub Nicholas J NJ   Cardenas Jesus M JM   Fiumara Andrew S AS   Troiano Paul M PM   Fischetti Andrea A   Gilbert Ryan J RJ  

Polymer 20170703


A major challenge in developing drug-releasing electrospun nanofibers is obtaining long-term drug release over many weeks with no burst release of drug. Here, we present new methods capable of prolonging the diffusive release of small molecule drugs from electrospun poly-L-lactic acid (PLLA) nanofibers. The methods focus on removal of retained electrospinning solvent through fiber heating, maintaining fibers in a laboratory setting, or a combination of these methods. These post-fabrication metho  ...[more]

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