Biochemical and immunopathological changes in experimental neurotoxocariasis

Area of Science:

• Neuroparasitology
• Immunology
• Neuroscience

Background:

• Toxocariasis is a common soil-transmitted parasitic disease.
• Toxocara canis larvae can invade the central nervous system, leading to neurotoxocariasis.
• Improved diagnostics are increasing neurotoxocariasis diagnoses in humans.

Purpose of the Study:

• To investigate the biochemical and immunopathological brain alterations in experimental Toxocara canis infection.
• To assess changes in larval load, pro-inflammatory cytokines, neurotransmitters, and glial activation.

Main Methods:

• Experimental infection of mice with Toxocara canis.
• Larval counting, cytokine assays (TNF-alpha, IL-6), neurotransmitter analysis (GABA, glutamate, dopamine, norepinephrine, serotonin).
• Histopathology, immunohistochemistry for iNOS and GFAP.

Main Results:

• Progressive increase in larval recovery over 16 weeks.
• Elevated pro-inflammatory cytokines and iNOS expression.
• Significant disturbances in neurotransmitter levels and increased astrocytic activation (GFAP).

Conclusions:

• Experimental neurotoxocariasis induces significant biochemical, immunological, and pathological changes in the brain.
• These alterations intensify over the course of infection, particularly in the chronic stage.