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Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation
08:27

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Published on: August 28, 2017

Enzymatically triggered actuation of miniaturized tools.

Noy Bassik1, Alla Brafman, Aasiyeh M Zarafshar

  • 1Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA.

Journal of the American Chemical Society
|September 21, 2010
PubMed
Summary

Enzyme-triggered miniaturized tools use biomolecular interactions for remote manipulation. These smart materials autonomously reconfigure in specific biological environments, enabling applications like tissue biopsy.

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Area of Science:

  • Biomaterials Science
  • Biotechnology
  • Nanotechnology

Background:

  • Enzyme-substrate interactions offer high specificity for biological targeting.
  • Miniaturized tools require biocompatible actuation mechanisms.
  • Autonomous reconfiguration in biological environments is a key challenge for smart devices.

Purpose of the Study:

  • To develop miniaturized tools triggered by enzyme-substrate interactions.
  • To create tools that operate under biocompatible conditions without external energy sources.
  • To demonstrate the utility of these tools in a biological context.

Main Methods:

  • Constructed miniaturized grippers using multilayer hinges with intrinsic strain energy, biopolymer triggers, and ferromagnetic elements.
  • Utilized selective enzymatic degradation of biopolymer components to trigger gripper closure.
  • Employed an orthogonal enzyme for gripper reopening.
  • Demonstrated remote manipulation capabilities.

Main Results:

  • Successfully triggered gripper closure and reopening using specific enzymes.
  • Achieved autonomous operation without external energy sources.
  • Demonstrated successful liver tissue biopsy in a model organ system.
  • Showcased gripping and releasing of an alginate bead.

Conclusions:

  • Enzyme-triggered biomolecular interactions can actuate miniaturized tools.
  • This methodology enables the development of smart materials for specific biological environments.
  • The developed tools offer a novel approach for minimally invasive procedures and targeted delivery systems.