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Cytopathic changes in rat microglial cells induced by pathogenic Acanthamoeba culbertsoni: morphology and cytokine

H J Shin1, M S Cho, S Y Jung

  • 1Department of Microbiology, Ajou University School of Medicine, Suwon 442-749, Korea. hjshin@madang.ajou.ac.kr

Clinical and Diagnostic Laboratory Immunology
|June 28, 2001
PubMed

Insights

Pathogenic Acanthamoeba culbertsoni causes cell death in rat microglial cells. This study observed cell necrosis and altered secretion of tumor necrosis factor alpha (TNF-alpha) and interleukin-1beta (IL-1beta).

Area of Science:

  • Neuroscience
  • Microbiology
  • Immunology

Background:

  • Microglial cells are key immune cells in the central nervous system.
  • Acanthamoeba culbertsoni is a pathogenic amoeba that can cause infections.

Purpose of the Study:

  • To investigate the cytopathic effects of Acanthamoeba culbertsoni on primary microglial cells.
  • To analyze changes in cytokine secretion (TNF-alpha and IL-1beta) following exposure to A. culbertsoni.

Main Methods:

  • Primary rat microglial cells were co-cultured with Acanthamoeba culbertsoni trophozoites and lysate.
  • Morphological changes were assessed using transmission electron microscopy (TEM).
  • Cytokine levels (TNF-alpha, IL-1beta) were measured via secretion assays.

Main Results:

  • TEM revealed necrotic processes and cell membrane lysis in microglial cells exposed to A. culbertsoni.
  • Co-culture with trophozoites or lysate increased TNF-alpha secretion.
  • IL-1beta secretion increased with trophozoites but decreased with lysate.

Conclusions:

  • Pathogenic Acanthamoeba culbertsoni induces cytopathic effects, including necrosis, in primary microglial cells.
  • A. culbertsoni alters the secretion profiles of TNF-alpha and IL-1beta from microglial cells, suggesting an inflammatory response.

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