Related Experiment Video
Updated: Feb 26, 2026
Isolation and Analysis of Brain-sequestered Leukocytes from Plasmodium berghei ANKA-infected Mice
Published on: January 2, 2013
Protein Tyrosine Phosphatase Inhibition Prevents Experimental Cerebral Malaria by Precluding CXCR3 Expression on T
Kristin M Van Den Ham1,2, Logan K Smith1,3, Martin J Richer4,5
1Department of Microbiology and Immunology, McGill University, Montréal, QC, H3A 0G4, Canada.
Abstract:
Cerebral malaria induced by Plasmodium berghei ANKA infection is dependent on the sequestration of cytotoxic T cells within the brain and augmentation of the inflammatory response. Herein, we demonstrate that inhibition of protein tyrosine phosphatase (PTP) activity significantly attenuates T cell sequestration within the brain and prevents the development of neuropathology. Mechanistically, the initial upregulation of CXCR3 on splenic T cells upon T cell receptor stimulation was critically decreased through the reduction of T cell-intrinsic PTP activity. Furthermore, PTP inhibition markedly increased IL-10 production by splenic CD4+ T cells by enhancing the frequency of LAG3+CD49b+ type 1 regulatory cells. Overall, these findings demonstrate that modulation of PTP activity could possibly be utilized in the treatment of cerebral malaria and other CXCR3-mediated diseases.
Insights
Inhibiting protein tyrosine phosphatase (PTP) activity reduces T cell brain infiltration and prevents cerebral malaria neuropathology. This PTP inhibition also enhances regulatory T cells, suggesting a potential therapeutic strategy for related diseases.
Area of Science:
- Immunology
- Neuroscience
- Pathology
Background:
- Cerebral malaria involves T cell brain sequestration and inflammation.
- Plasmodium berghei ANKA infection models this severe condition.
Purpose of the Study:
- To investigate the role of protein tyrosine phosphatase (PTP) activity in cerebral malaria.
- To determine if PTP inhibition can prevent neuropathology.
Main Methods:
- Studied T cell sequestration in the brain during Plasmodium berghei ANKA infection.
- Assessed the impact of PTP inhibition on T cell responses and cytokine production.
- Analyzed T cell-intrinsic PTP activity and regulatory T cell populations.
Main Results:
- PTP inhibition significantly reduced T cell sequestration in the brain.
- Neuropathology development was prevented by PTP inhibition.
- PTP inhibition decreased CXCR3 upregulation on T cells.
- Increased IL-10 production and frequency of type 1 regulatory cells were observed.
Conclusions:
- Modulating PTP activity is a potential therapeutic approach for cerebral malaria.
- PTP inhibition may offer benefits for other CXCR3-mediated diseases.
More Related Videos
09:13Author Spotlight: Identifying Compensatory Pathways in Malaria Parasites Containing Hypomorphic Allele of Essential Protein Kinases
Published on: November 22, 2024
10:09Selection of Plasmodium falciparum Parasites for Cytoadhesion to Human Brain Endothelial Cells
Published on: January 3, 2012
