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Digital microfluidic immunocytochemistry in single cells.

Alphonsus H C Ng1,2, M Dean Chamberlain1,2,3, Haozhong Situ1,2

  • 1Institute of Biomaterials and Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario M5S 3G9, Canada.

Nature Communications
|June 25, 2015
PubMed
Summary
This summary is machine-generated.

A new technique, Digital microfluidic Immunocytochemistry in Single Cells (DISC), automates cell analysis for rapid protein phosphorylation studies. DISC reveals fast signaling events, offering insights into cell responses to stimuli.

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Area of Science:

  • Biotechnology
  • Cell Biology
  • Biochemistry

Background:

  • Understanding cell signaling pathways is crucial for disease research.
  • Current methods for analyzing protein phosphorylation have limitations in speed and resolution.
  • Investigating dynamic signaling events at the single-cell level is challenging.

Purpose of the Study:

  • To introduce and validate a novel technique, Digital microfluidic Immunocytochemistry in Single Cells (DISC).
  • To enable high-resolution, time-resolved analysis of protein phosphorylation in single cells.
  • To explore the concentration- and time-dependent effects of growth factor stimulation on cell signaling.

Main Methods:

  • DISC platform automates cell culture, stimulation, and immunocytochemistry.
  • High-speed interrogation of protein phosphorylation states.
  • Quantitative analysis of signaling proteins like PDGFR and Akt.

Main Results:

  • DISC allows interrogation of protein phosphorylation with stimulus durations as short as 3 seconds.
  • Demonstrated high time resolution in observing signaling events.
  • A 10-second PDGF pulse activated Akt in over 30% of fibroblasts, revealing rapid cellular commitment.

Conclusions:

  • DISC provides a powerful new tool for quantitative, high-time-resolution single-cell signaling analysis.
  • The technique facilitates novel observations of rapid cellular responses to stimuli.
  • DISC is suitable for screening signaling responses in heterogeneous cell populations and various research applications.