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A Closed-Type Wireless Nanopore Electrode for Analyzing Single Nanoparticles
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Nanokit for single-cell electrochemical analyses.

Rongrong Pan1, Mingchen Xu1, Dechen Jiang2

  • 1The State Key Laboratory of Analytical Chemistry for Life Science, Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Jiangsu 210093, China.

Proceedings of the National Academy of Sciences of the United States of America
|September 28, 2016
PubMed
Summary
This summary is machine-generated.

A novel nanokit enables precise measurement of intracellular glucose and sphingomyelinase (SMase) activity in single cells. This advancement reveals significant cellular heterogeneity, crucial for understanding cell signaling.

Keywords:
SMase activitycellular heterogeneityelectrochemical analysesnanokitsingle cell

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Area of Science:

  • Biotechnology
  • Analytical Chemistry
  • Cell Biology

Background:

  • Understanding cellular heterogeneity and signaling cascades requires advanced single-cell analysis tools.
  • Current methods for analyzing intracellular molecules are often complex or lack sensitivity.

Purpose of the Study:

  • To develop an integrated nanodevice for analyzing small molecules and enzyme activity within single cells.
  • To demonstrate the nanokit's capability in measuring intracellular glucose and sphingomyelinase (SMase) activity.

Main Methods:

  • Fabrication of a nanometer-sized capillary nanokit with an integrated ring electrode.
  • Electrochemical pumping of kit components from the capillary tip for in-situ reactions.
  • Electrochemical detection of hydrogen peroxide generated from analyte reactions.

Main Results:

  • Successfully measured intracellular glucose levels and sphingomyelinase (SMase) activity in single cells.
  • Observed significant cellular heterogeneity in the concentrations of these analytes.
  • Demonstrated the nanokit's ability for femtoliter-scale reactions and measurements.

Conclusions:

  • The nanokit offers a simplified, integrated approach for single-cell analysis compared to complex existing methods.
  • This technology provides a specific device for characterizing cellular compounds' reactivity and concentrations at the single-cell level.
  • The findings highlight the nanokit's potential for advancing the study of cellular heterogeneity and signaling.