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A Droplet-Based Microfluidic Approach and Microsphere-PCR Amplification for Single-Stranded DNA Amplicons
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Polymersome production on a microfluidic platform using pH sensitive block copolymers.

Luke Brown1, Sally L McArthur, Phillip C Wright

  • 1ChELSI Institute, Department of Chemical and Process Engineering, University of Sheffield, UK.

Lab on a Chip
|May 19, 2010
PubMed
Summary
This summary is machine-generated.

Microfluidic devices enable the production of pH-sensitive polymersomes for drug delivery. This method achieves efficient encapsulation without organic solvents, offering a continuous and biocompatible solution for intracellular delivery applications.

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Drug Delivery

Background:

  • pH-sensitive biocompatible block copolymer polymersomes are crucial for intracellular drug and protein delivery.
  • Robust production methods are needed to enhance polymersome encapsulation efficiency.
  • Microfluidic devices offer potential advantages for controlled polymersome self-assembly.

Purpose of the Study:

  • To develop a microfluidic method for producing poly(2-(methacryloyloxy)ethyl phosphorylcholine)-poly(2-(diisopropylamino)ethyl methacrylate) (PMPC-b-PDPA) polymersomes.
  • To investigate pH-induced self-assembly of PMPC-b-PDPA block copolymers in a microfluidic device.
  • To evaluate the encapsulation efficiency of the microfluidic production method for Bovine Serum Albumin (BSA).

Main Methods:

  • Utilized a flow-focusing microfluidic device to induce self-assembly of PMPC-b-PDPA block copolymer.
  • Manipulated pH within microchannels to create a pH gradient, triggering copolymer self-assembly.
  • Characterized polymersome size using dynamic light scattering and structure using transmission electron microscopy.
  • Quantified BSA encapsulation efficiency via spectroscopic absorbance measurements.

Main Results:

  • Successfully produced polymersome nanostructures with hydrodynamic diameters ranging from 75-275 nm.
  • Confirmed double membrane structures indicative of polymersomes via transmission electron microscopy.
  • Achieved encapsulation efficiency for BSA comparable to standard in-solution methods.
  • Demonstrated a solvent-free production process through pH-induced self-assembly.

Conclusions:

  • Microfluidic production of PMPC-b-PDPA polymersomes is a viable, continuous method for intracellular delivery applications.
  • The developed microfluidic system eliminates the need for organic solvents, enhancing biocompatibility.
  • This approach offers an efficient and scalable alternative for producing polymersomes for drug delivery.