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Related Experiment Video

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Parallelized Wireless Sensing System for Continuous Monitoring of Microtissue Spheroids.

Lei Dong1,2, Paolo S Ravaynia2, Qing-An Huang1

  • 1Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 210096, China.

ACS Sensors
|June 11, 2020
PubMed
Summary
This summary is machine-generated.

This study introduces a wireless sensor system to monitor microtissue spheroid size during drug testing, overcoming limitations of wired electrical readouts for lab automation and improving spheroid characterization.

Keywords:
biosensorsinductor−capacitormicrotissue spheroidssplit ringwireless sensing system

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Area of Science:

  • Biomedical Engineering
  • Microfluidics
  • Biosensing

Background:

  • Electrical readout methods for microtissue spheroid analysis are limited by cumbersome cable connections.
  • Existing methods hinder integration with lab automation tools for long-term studies.
  • Need for non-invasive, automated monitoring of microtissues in drug discovery.

Purpose of the Study:

  • To develop a wireless sensor scheme for real-time monitoring of microtissue spheroid size variations.
  • To enable long-term culturing and drug exposure assays without physical connections.
  • To overcome limitations of current electrical readout methods in microtissue analysis.

Main Methods:

  • Developed a wireless sensor system using magnetic coupling between an inductor-capacitor (LC) readout circuit and on-chip split-ring sensors.
  • Integrated 12 sensor compartments on a microscopy slide with optimized dimensions to prevent crosstalk.
  • Utilized the system for continuous monitoring of colon cancer microtissue spheroid growth inhibition upon doxorubicin exposure.

Main Results:

  • Successfully demonstrated wireless detection of microtissue size variations during long-term culturing (over 4 days).
  • Achieved stable, crosstalk-free measurements with a 9 mm sensor pitch, compatible with standard lab equipment.
  • Validated the system's proof-of-concept by monitoring doxorubicin-induced growth inhibition in colon cancer spheroids.

Conclusions:

  • The wireless sensor scheme effectively overcomes cable connection limitations for electrical microtissue spheroid characterization.
  • The system offers a stable and compatible solution for automated, long-term monitoring in drug screening and research.
  • This technology holds significant potential for advancing high-throughput microtissue analysis in pharmaceutical research.