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Fibrinogen binding to intercellular adhesion molecule 1: implications for Plasmodium falciparum adhesion
1Liverpool School of Tropical Medicine, Liverpool L3 5QA, United Kingdom.
Infection and Immunity
|June 18, 2002
Abstract:
Intercellular adhesion molecule 1 (ICAM-1) is an endothelial cell adhesion molecule implicated in cerebral malaria. We investigated whether fibrinogen affects Plasmodium falciparum binding to ICAM-1, as the ICAM-1 binding sites of P. falciparum and fibrinogen overlap. We show that fibrinogen dramatically reduces P. falciparum adhesion to ICAM-1 under flow conditions.
Insights
Fibrinogen significantly reduces Plasmodium falciparum parasite adhesion to Intercellular Adhesion Molecule 1 (ICAM-1) under flow conditions, impacting cerebral malaria pathogenesis.
Area of Science:
- Immunology
- Infectious Diseases
- Cell Biology
Background:
- Intercellular Adhesion Molecule 1 (ICAM-1) is an endothelial cell adhesion molecule.
- ICAM-1 plays a role in the pathogenesis of cerebral malaria.
- Plasmodium falciparum (P. falciparum) cytoadherence is a key feature of severe malaria.
Purpose of the Study:
- To investigate the effect of fibrinogen on Plasmodium falciparum binding to ICAM-1.
- To understand the molecular mechanisms underlying P. falciparum cytoadherence in cerebral malaria.
Main Methods:
- In vitro flow assays were used to measure P. falciparum adhesion to ICAM-1.
- The binding of P. falciparum to ICAM-1 in the presence and absence of fibrinogen was analyzed.
Main Results:
- Fibrinogen significantly reduced the adhesion of P. falciparum to ICAM-1 under flow conditions.
- This suggests a competitive binding mechanism between fibrinogen and P. falciparum to ICAM-1.
Conclusions:
- Fibrinogen acts as an inhibitor of P. falciparum adhesion to ICAM-1.
- These findings provide new insights into the complex interactions between host factors and malaria parasites, potentially opening new therapeutic avenues for cerebral malaria.