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Updated: Aug 29, 2025
3-D Imaging and Analysis of Neurons Infected In Vivo with Toxoplasma gondii
Published on: December 9, 2014
Four Chemotherapeutic Compounds That Limit Blood-Brain-Barrier Invasion by Toxoplasma gondii
Zijing Yan1,2,3, Hao Yuan1,4, Junjie Wang1
1College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China.
Background:
Toxoplasma gondii, an intracellular protozoan parasite, exists in the host brain as cysts, which can result in Toxoplasmic Encephalitis (TE) and neurological diseases. However, few studies have been conducted on TE, particularly on how to prevent it. Previous proteomics studies have showed that the expression of C3 in rat brains was up-regulated after T. gondii infection.
Methods:
In this study, we used T. gondii to infect mice and bEnd 3 cells to confirm the relation between T. gondii and the expression of C3. BEnd3 cells membrane proteins which directly interacted with C3a were screened by pull down. Finally, animal behavior experiments were conducted to compare the differences in the inhibitory ability of TE by four chemotherapeutic compounds (SB290157, CVF, NSC23766, and Anxa1).
Results:
All chemotherapeutic compounds in this study can inhibit TE and cognitive behavior in the host. However, Anxa 1 is the most suitable material to inhibit mice TE.
Conclusion:
T. gondii infection promotes TE by promoting host C3 production. Anxa1 was selected as the most appropriate material to prevent TE among four chemotherapeutic compounds closely related to C3.
Insights
Toxoplasma gondii infection promotes Toxoplasmic Encephalitis (TE) by increasing host C3 production. Anxa1 effectively inhibits TE and cognitive impairment in mice, making it a promising preventative material.
Area of Science:
- Neuroparasitology
- Immunology
- Pharmacology
Background:
- Toxoplasma gondii infection leads to Toxoplasmic Encephalitis (TE) and neurological issues.
- C3 expression is upregulated in rat brains post-T. gondii infection.
- Limited research exists on TE prevention strategies.
Purpose of the Study:
- To investigate the relationship between T. gondii infection and C3 expression.
- To evaluate the efficacy of four chemotherapeutic compounds in inhibiting TE.
- To identify the most suitable compound for TE prevention.
Main Methods:
- Mice and bEnd.3 cells were infected with T. gondii to study C3 expression.
- Membrane proteins interacting with C3a were identified using pull-down assays.
- Animal behavior tests assessed the inhibitory effects of SB290157, CVF, NSC23766, and Anxa1 on TE.
Main Results:
- All tested chemotherapeutic compounds demonstrated inhibition of TE and cognitive deficits.
- Anxa1 exhibited the highest efficacy in inhibiting TE in infected mice.
- The study confirmed a link between T. gondii infection and C3 production.
Conclusions:
- T. gondii infection exacerbates TE by stimulating host C3 production.
- Anxa1 is identified as the most effective compound for preventing TE among those tested.
- Further research into Anxa1's therapeutic potential for TE is warranted.
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