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Issue 22, 2018
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PLGA-based nanofibers with a biomimetic polynoradrenaline sheath for rapid in vivo sampling of tetrodotoxin and sulfonamides in pufferfish

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Abstract

Nanomaterials have shown great potential for application in microextraction due to their distinguishing nanoscale architectures and superior physicochemical properties. Herein, novel poly(lactic-co-glycolic acid) (PLGA) solid-phase microextraction (SPME) fibers, which were incorporated with a self-assembled graphene oxide (GO)-coated γ-Al2O3 composite (Al2O3@GO), were fabricated on stainless steel wires via an electrospinning method. The as-spun nanofibers were further sheathed through the self-polymerization of noradrenaline (NA), an agonist found in oysters, to provide a compatible biointerface and antifouling capacity. Acting as the coating substrate of the as-prepared fibers, PLGA is known for its prominent biocompatibility and biodegradability, while the adsorptive Al2O3@GO particles helped to increase their loading capacity. The modified PLGA-based electrospun nanofibers exhibited much higher extraction efficiency compared with the thicker polydimethylsiloxane (PDMS) coatings (165 μm) and polyacrylate (PA) coatings (85 μm). Due to the fine biointerface of the PLGA-based nanofibers, a rapid extraction equilibrium was observed and sampling with the custom-made Al2O3@GO–PLGA@PNA fibers could be accomplished within 15 min. The fibers were then successfully employed for simultaneous in vivo sampling of tetrodotoxin (TTX) and sulfonamides (SAs) in the dorsal–epaxial muscle of living pufferfish (Takifugu obscurus), and satisfactory sensitivities with limits of detection (LODs) in the range of 0.52–2.30 ng g−1 and comparable accuracies to the conventional liquid extraction (LE) method were achieved. In vivo sampling of target pharmaceuticals with the modified nanofibers showed their feasibility for further metabolomics and pharmacokinetics studies in biotissues.

Graphical abstract: PLGA-based nanofibers with a biomimetic polynoradrenaline sheath for rapid in vivo sampling of tetrodotoxin and sulfonamides in pufferfish

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Publication details

The article was received on 20 Mar 2018, accepted on 09 Apr 2018 and first published on 11 Apr 2018


Article type: Paper
DOI: 10.1039/C8TB00757H
Citation: J. Mater. Chem. B, 2018,6, 3655-3664
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    PLGA-based nanofibers with a biomimetic polynoradrenaline sheath for rapid in vivo sampling of tetrodotoxin and sulfonamides in pufferfish

    Y. Tang, S. Huang, J. Xu, G. Ouyang and Y. Liu, J. Mater. Chem. B, 2018, 6, 3655
    DOI: 10.1039/C8TB00757H

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