Related Experiment Videos
Respective role of TNF receptors in the development of experimental cerebral malaria
1Dept. of Anaesthesiology, Pharmacology and Surgical Intensive Care, University Medical Center, Geneva, Switzerland.
Abstract:
The respective role of the two receptors of TNF in experimental cerebral malaria (CM) was investigated. During CM, a significant upregulation of TNF-receptor 2 (TNFR2), but not of TNFR1, was found in brain microvessels of susceptible, but not resistant mice. Mice genetically deficient for TNFR2 (Tnfr2null) were significantly protected from CM, while TNFR1-deficient (Tfnr1null) mice were as susceptible as wild-type mice. The protection of Tnfr2null mice could be explained by their absence of ICAM-1 upregulation and leukocyte sequestration, known to occur in brain microvessels of CM-susceptible animals.
Insights
Tumor necrosis factor receptor 2 (TNFR2) plays a key role in experimental cerebral malaria (CM). Blocking TNFR2 protects mice from CM by preventing harmful inflammation and leukocyte buildup in the brain.
Area of Science:
- Neuroimmunology
- Infectious Diseases
- Pathophysiology
Background:
- Cerebral malaria (CM) is a severe complication of Plasmodium falciparum infection.
- Tumor necrosis factor (TNF) signaling is implicated in CM pathogenesis.
- The distinct roles of TNF receptors, TNFR1 and TNFR2, in CM remain unclear.
Purpose of the Study:
- To investigate the specific roles of TNFR1 and TNFR2 in experimental cerebral malaria.
- To determine the therapeutic potential of targeting TNFR2 in CM.
Main Methods:
- Utilized a mouse model of experimental cerebral malaria.
- Compared disease severity in wild-type, TNFR1-deficient (Tnfr1null), and TNFR2-deficient (Tnfr2null) mice.
- Assessed TNFR expression, ICAM-1 upregulation, and leukocyte sequestration in brain microvessels.
Main Results:
- TNFR2, not TNFR1, was significantly upregulated in brain microvessels of susceptible mice during CM.
- Tnfr2null mice exhibited significant protection from CM compared to wild-type and Tnfr1null mice.
- Protection in Tnfr2null mice correlated with reduced ICAM-1 upregulation and leukocyte sequestration.
Conclusions:
- TNFR2 is a critical mediator of experimental cerebral malaria pathogenesis.
- Targeting TNFR2 offers a potential therapeutic strategy for preventing CM.
- TNFR2-mediated inflammation and leukocyte infiltration are key drivers of CM severity.