pH-Dependent disruption of giant polymer vesicles: a step towards biomimetic membranes

Vladimir Sincari; Eliézer Jäger; Kahynna Cavalcante Loureiro; Martina Vragovic; Eddie Hofmann; Mathias Schlenk; Marcela Filipová; Eliška Rydvalová; Petr Štěpánek; Martin Hrubý; Stephan Förster; Alessandro Jäger

doi:10.1039/D2PY01229D

pH-Dependent disruption of giant polymer vesicles: a step towards biomimetic membranes†

Vladimir Sincari,

^a Eliézer Jäger,

^a Kahynna Cavalcante Loureiro,^a Martina Vragovic,^a Eddie Hofmann,^b Mathias Schlenk,

^b Marcela Filipová,

^a Eliška Rydvalová,

^a Petr Štěpánek,^a Martin Hrubý,

^a Stephan Förster

^bcd and Alessandro Jäger

*^a

Author affiliations

* Corresponding authors

^a Institute of Macromolecular Chemistry, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
E-mail: ajager@imc.cas.cz

^b Department of Chemistry, University of Bayreuth, 95447 Bayreuth, Germany

^c JCNS-1/ICS-1, Forschungszentrum Jülich, 52425 Jülich, Germany

^d Physical Chemistry, RWTH University, 52074 Aachen, Germany

Abstract

Giant unilamellar polymer vesicles (GUPVs) capable of selectively delivering protected payloads into intracellular environments and releasing them in stimuli-triggered, precise spatially and temporally controlled manners are attractive bioactive cargo delivery tools. Herein, we present highly size-defined and monodisperse (42.1 ± 1.2, 60.5 ± 1.0, 80.4 ± 1.4 and 97.9 ± 1.2 μm in diameter, respectively) pH-responsive giant GUPVs prepared via microfluidic droplet generation using a flow-focusing poly(dimethylsiloxane) (PDMS)-based microfluidic device. Poly(ethylene oxide)-block-poly[2-(diisopropylamino)ethyl methacrylate] (PEO-b-PDPA) is a pH-responsive polymer that was synthesized via reversible addition–fragmentation chain-transfer (RAFT) polymerization and used in combination with poly(ethylene oxide)-block-poly(1,2-butadiene) (PEO-b-PBD) to produce homogeneous pH-responsive giant GUPVs. To demonstrate the spatiotemporal control provided by this approach, we studied in detail the pH-responsiveness of GUPVs according to the disruption and release of dye cargo under distinct acidic conditions using fluorescence confocal microscopy. This approach can be utilized to fabricate pH-responsive delivery systems for various active compounds, microreactors, and artificial organelles, thereby paving the way towards cell mimicry.

Polymer Chemistry

pH-Dependent disruption of giant polymer vesicles: a step towards biomimetic membranes†

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