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|October 25, 2024
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Summary

We developed a stable, injectable nanosensor using single-walled carbon nanotubes (SWCNTs) in a hydrogel for non-invasive biosensing in live mice. This system successfully detected chemotherapy drugs and other analytes.

Keywords:
SWCNTbiosensingcarbon nanotubesdoxorubicinhydrogelimplantsin vivomethylcellulosemicenanosensor

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Nanotechnology

Background:

  • Single-walled carbon nanotubes (SWCNTs) offer tissue-transparent fluorescence for non-invasive biosensing.
  • Developing practical, non-invasive biosensing systems using SWCNTs remains a challenge.

Purpose of the Study:

  • To investigate the functionality of SWCNT-based nanosensors within injectable hydrogel systems.
  • To optimize SWCNT encapsulation for stable and effective analyte detection in vivo.

Main Methods:

  • Evaluated various SWCNT-hydrogel formulations for nanosensor stability and performance.
  • Tested the optimal SWCNT-hydrogel system in live mice for detecting ions, small molecules, proteins, and doxorubicin.
  • Assessed the long-term stability of the nanosensor system in vivo.

Main Results:

  • SWCNT encapsulation in a sulfonated methylcellulose hydrogel proved optimal for detecting various analytes.
  • The nanosensor system demonstrated stability in live mice for several weeks.
  • Successfully detected local injections of the chemotherapeutic agent doxorubicin.

Conclusions:

  • A stable, injectable SWCNT-hydrogel nanosensor was developed for non-invasive in vivo detection.
  • This technology shows promise for monitoring therapeutic agents and other biomarkers in animal models.
  • Potential for future clinical applications in patient monitoring and diagnostics.