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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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[The role of nitric oxide (NO) in parasitic infections]

Elzbieta Wandurska-Nowak1

  • 1Katedra i Zakład Biologii i Parazytologii Lekarskiej, Akademia Medyczna im. Karola Marcinkowskiego, ul. Fredry 10, 61-701 Poznań.

Wiadomosci Parazytologiczne
|July 26, 2006
PubMed

Insights

Nitric oxide (NO) is vital for immune defense against parasitic infections. Macrophages produce high NO levels, mediated by the iNOS gene, to combat pathogens like malaria and leishmaniasis.

Area of Science:

  • Immunology
  • Parasitology
  • Molecular Biology

Context:

  • Nitric oxide (NO) is a critical signaling molecule in physiological and pathological processes.
  • NO is integral to immunoregulation and non-specific host defense against various infections.
  • Macrophages are key immune cells that utilize NO for host defense functions.

Purpose:

  • To review the multifaceted role of nitric oxide (NO) in combating parasitic infections.
  • To summarize current evidence on NO production and iNOS gene expression in parasitic diseases.
  • To highlight NO's contribution to host protection mechanisms against parasites.

Summary:

  • Enhanced NO production and inducible nitric oxide synthase (iNOS) gene expression are observed in parasitic diseases such as malaria, toxoplasmosis, leishmaniasis, trypanosomiasis, and schistosomiasis.
  • Pro-inflammatory cytokines, particularly from Th1 cells (IFN-gamma, TNF-alpha, IL-1, IL-2), up-regulate iNOS gene expression, leading to high NO levels.
  • NO mediates host protection by directly killing parasites or inhibiting their growth, playing a significant role in host defense.

Impact:

  • This review underscores the critical role of NO in the host's defense against a wide range of parasitic infections.
  • Understanding NO's function provides insights into potential therapeutic strategies targeting parasitic diseases.
  • The findings support the conclusion that NO is a key mediator of protective immunity in most parasitic infections.

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