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Turning erythrocytes into functional micromotors.

Zhiguang Wu1, Tianlong Li, Jinxing Li

  • 1Department of Nanoengineering, University of California, San Diego , La Jolla, California 92093, United States.

ACS Nano
|November 22, 2014
PubMed
Summary

Researchers transformed red blood cells (RBCs) into ultrasound-propelled micromotors using iron oxide nanoparticles. These biocompatible RBC motors offer enhanced propulsion and guidance in biological fluids, overcoming synthetic motor limitations.

Keywords:
biocompatibilitymagnetic guidancered blood cellssynthetic motorultrasoundwhole blood

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Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Cellular Engineering

Background:

  • Synthetic micromotors face immune clearance and clearance in the bloodstream.
  • Developing biocompatible alternatives for biomedical applications is crucial.

Purpose of the Study:

  • To engineer red blood cell (RBC)-based micromotors for biomedical applications.
  • To utilize ultrasound propulsion and magnetic guidance for RBC motor control.

Main Methods:

  • Loading RBCs with iron oxide nanoparticles for asymmetric magnetization.
  • Employing ultrasound for propulsion and magnetic fields for guidance.
  • Evaluating RBC motor stability, functionality, and biocompatibility in biological fluids.

Main Results:

  • Achieved efficient, guided, and prolonged propulsion of RBC motors in various biological fluids, including whole blood.
  • Demonstrated magnetic alignment and guidance capabilities of the RBC motors.
  • Confirmed the stability and functionality of RBC motors, with good tolerability to ultrasound.

Conclusions:

  • RBCs can be transformed into functional micromotors with ultrasound propulsion and magnetic guidance.
  • RBC motors offer inherent biocompatibility and retain natural cellular properties, surpassing synthetic motors.
  • These RBC micromotors show significant promise for diverse biomedical applications.