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Biodegradable Metal-Organic Framework-Based Microrobots (MOFBOTs).

Anastasia Terzopoulou1, Xiaopu Wang1, Xiang-Zhong Chen1

  • 1Institute of Robotics and Intelligent Systems, ETH Zurich, Tannenstrasse 3, Zurich, 8092, Switzerland.

Advanced Healthcare Materials
|September 9, 2020
PubMed
Summary
This summary is machine-generated.

This study introduces novel biodegradable MOF-based small-scale robots (MOFBOTs) for targeted drug delivery. These MOFBOTs exhibit magnetic locomotion, efficient drug loading, and complete degradation, offering a promising advancement in nanomedicine.

Keywords:
biodegradationdrug deliverymetal-organic frameworksmicrorobotszeolitic imidazolate frameworks

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Nanotechnology

Background:

  • Microrobots and metal-organic frameworks (MOFs) show potential for drug delivery but face limitations like low drug loading, poor degradability, and lack of motility.
  • Integrating MOFs with microrobots creates MOF-based small-scale robots (MOFBOTs), a novel platform for advanced biomedical applications.
  • Biodegradability remains a significant challenge for micro- and nanoswimmers, including small-scale robots.

Purpose of the Study:

  • To develop a highly integrated, biodegradable MOF-based small-scale robot (MOFBOT) capable of magnetic locomotion, drug delivery, and selective degradation.
  • To investigate the drug loading capacity and controlled release of chemotherapeutic drugs from the MOF component.
  • To evaluate the biodegradability and in vitro efficacy of the developed MOFBOT system.

Main Methods:

  • Fabrication of enzymatically biodegradable gelatin-based helical microrobots.
  • Integration of metal-organic frameworks (MOFs) onto the microrobots for drug loading.
  • Utilizing magnetic fields for controlled locomotion of the MOFBOTs.
  • Assessing pH-responsive drug release and in vitro degradation in cell cultures.
  • Evaluating the effect of Doxorubicin-loaded MOFBOTs on cancer cell viability.

Main Results:

  • A novel MOF-based small-scale robot (MOFBOT) was successfully developed, demonstrating magnetic locomotion, drug delivery, and selective degradation.
  • The MOF component enabled superior loading of chemotherapeutic drugs with controlled release via pH-responsive degradation.
  • The integrated MOFBOTs exhibited complete degradation within two weeks in cell cultures.
  • In vitro studies showed reduced cancer cell viability upon Doxorubicin delivery by the MOFBOTs within short time frames.

Conclusions:

  • The developed MOFBOT system represents a significant advancement, offering a highly integrated and fully biodegradable solution for targeted drug delivery.
  • This MOFBOT platform overcomes the limitations of traditional microrobots and MOFs by combining motility, efficient drug loading, and controlled degradation.
  • The findings open new avenues for the design and application of biodegradable small-scale robots in nanomedicine and cancer therapy.