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Related Experiment Video

Updated: Jun 2, 2026

Fabrication of Large-area Free-standing Ultrathin Polymer Films
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Published on: June 3, 2015

Cell surface engineering with polyelectrolyte multilayer thin films.

John T Wilson1, Wanxing Cui, Veronika Kozlovskaya

  • 1Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.

Journal of the American Chemical Society
|April 16, 2011
PubMed
Summary
This summary is machine-generated.

Researchers developed non-toxic polyelectrolyte multilayer (PEM) films for cell surfaces. These engineered cell surfaces enable new therapies and in vivo delivery applications, overcoming previous cytotoxicity challenges.

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Area of Science:

  • Biomaterials Science
  • Cell Engineering
  • Nanotechnology

Background:

  • Layer-by-layer assembly of polyelectrolyte multilayer (PEM) films offers precise control over cell surface modification.
  • High cytotoxicity of traditional polycations hinders PEM fabrication on viable cells.

Purpose of the Study:

  • To engineer a novel class of non-cytotoxic PEMs for viable cell surface modification.
  • To develop tunable PEMs with modular biological functionality and controllable physicochemical properties.
  • To demonstrate the in vivo applicability of PEM-engineered cells for transplantation and drug delivery.

Main Methods:

  • Rational design of cationic copolymers that undergo conformational changes to mitigate cell membrane disruption.
  • Layer-by-layer assembly of these engineered copolymers onto living cells.
  • Assessment of cell viability, function, and in vivo performance post-transplantation and as delivery vehicles.

Main Results:

  • Discovery of specific cationic copolymers that enable non-cytotoxic PEM deposition on cells.
  • Demonstration of tailorable PEM properties including composition, reactivity, thickness, and mechanics.
  • Successful in vivo transplantation of PEM-engineered cells, maintaining viability and function.
  • Utilized PEM-engineered cells as carriers for in vivo delivery of biomolecular payloads.

Conclusions:

  • A new class of biocompatible PEMs has been engineered, overcoming previous cytotoxicity limitations.
  • This technology enables precise, customizable modification of cell surfaces for therapeutic applications.
  • The developed design strategies establish a platform for cell transplantation and engineered cell-based therapies.