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Related Experiment Videos

Genetically encoded fluorescent indicator for intracellular hydrogen peroxide.

Vsevolod V Belousov1, Arkady F Fradkov, Konstantin A Lukyanov

  • 1Laboratory of Genes for Regeneration, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya Street 16/10, Moscow 117997, Russia.

Nature Methods
|March 24, 2006
PubMed
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Scientists created HyPer, a fluorescent probe for tracking hydrogen peroxide (H2O2) in cells. This tool revealed H2O2 changes linked to cell death and physiological responses, offering new insights into cellular processes.

Area of Science:

  • Cell Biology
  • Biochemistry
  • Molecular Biology

Background:

  • Hydrogen peroxide (H2O2) is a crucial signaling molecule in cellular processes.
  • Existing methods for H2O2 detection in living cells have limitations.
  • A genetically encoded, highly specific probe is needed for real-time H2O2 monitoring.

Purpose of the Study:

  • To develop and validate a genetically encoded fluorescent probe for intracellular H2O2 detection.
  • To monitor H2O2 production in real-time at the single-cell level.
  • To investigate the role of H2O2 in cellular responses to stimuli like Apo2L/TRAIL and nerve growth factor.

Main Methods:

  • Development of HyPer, a probe based on circularly permuted yellow fluorescent protein (cpYFP) and the OxyR sensor.
  • Utilizing HyPer to detect H2O2 in the cytoplasm and mitochondria of HeLa and PC-12 cells.

Related Experiment Videos

  • Correlating H2O2 levels with mitochondrial transmembrane potential (ΔΨ) and cellular morphology changes.

    • Main Results:

    • HyPer successfully detected intracellular H2O2 production in response to Apo2L/TRAIL treatment.
    • Observed parallel increases in cytoplasmic H2O2 with decreased mitochondrial ΔΨ and altered cell shape.
    • Detected localized mitochondrial H2O2 bursts during ΔΨ oscillations and H2O2 increase upon physiological stimulation (nerve growth factor).

    Conclusions:

    • HyPer is a sensitive and specific tool for monitoring intracellular H2O2 dynamics.
    • The probe enables real-time visualization of H2O2 production in various cellular compartments.
    • Findings highlight the involvement of H2O2 in apoptosis and physiological signaling pathways.