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Updated: Oct 9, 2026

Application of Genetically Encoded Fluorescent Nitric Oxide (NO•) Probes, the geNOps, for Real-time Imaging of NO• Signals in Single Cells
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Application of Genetically Encoded Fluorescent Nitric Oxide (NO•) Probes, the geNOps, for Real-time Imaging of NO• Signals in Single Cells

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Implications of inducible nitric oxide synthase expression and enzyme activity

K D Kröncke1, C V Suschek, V Kolb-Bachofen

  • 1Research Group Immunobiology in the Biomedical Research Centre, Heinrich-Heine-University, Düsseldorf, Germany. kroencke@uni-duesseldorf.de

Antioxidants & Redox Signaling
|March 7, 2001
PubMed

Insights

Inducible nitric oxide synthase (NOS) activity in human diseases remains complex. Despite numerous NO effects, effective therapies are limited due to its contradictory roles in cell function and disease.

Area of Science:

  • Biomedical Science
  • Molecular Biology
  • Pathophysiology

Background:

  • Inducible nitric oxide synthase (NOS) produces nitric oxide (NO), a molecule with diverse biological effects.
  • Understanding NO's role in human diseases is crucial, yet therapeutic applications are limited.
  • The complex and often contradictory actions of NO present significant challenges.

Purpose of the Study:

  • To review current knowledge on inducible NOS activity in human diseases.
  • To explore the multifaceted effects of nitric oxide (NO) on cellular processes.
  • To discuss the challenges in developing NO-based therapies.

Main Methods:

  • Literature review of inducible NOS (iNOS) and nitric oxide (NO) research.
  • Analysis of NO's dual roles in cytotoxicity, apoptosis, and redox balance.
  • Examination of NO's impact on signaling pathways and gene transcription.

Main Results:

  • Nitric oxide (NO) exhibits paradoxical effects: it can be both protective and cytotoxic, pro-apoptotic and anti-apoptotic.
  • NO's antioxidant properties are counterbalanced by its potential to oxidize cellular thiols.
  • NO's signaling effects are concentration-dependent and can activate or inhibit pathways and transcription.

Conclusions:

  • The complex, concentration-dependent, and context-specific actions of NO complicate therapeutic strategies.
  • Further research is needed to elucidate the precise mechanisms of NO in various disease states.
  • Timing, duration, and specific inflammatory events are critical factors in NO's biological impact.

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