Related Experiment Video
Updated: Jun 24, 2026
Selection of Plasmodium falciparum Parasites for Cytoadhesion to Human Brain Endothelial Cells
Published on: January 3, 2012
Plasma From Older Children in Malawi Inhibits Plasmodium falciparum Binding in 3-Dimensional Brain Microvessels
Fatou Joof1, Ruoqian Hu2, Alex Saidi3
1Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, Washington, USA.
Abstract:
A hallmark of cerebral malaria is sequestration of Plasmodium falciparum-infected erythrocytes (IEs) in the brain microcirculation. Antibodies contribute to malaria immunity, but it remains unclear whether functional antibodies targeting parasite-expressed ligand can block cytoadhesion in the brain. Here, we screened the plasma of older children and young adults in Malawi to characterize the antibody response against the P. falciparum-IE surface and used a bioengineered 3-dimensional (3D) human brain microvessel model incorporating variable flow dynamics to measure adhesion-blocking responses. We found a strong correlation between surface antibody reactivity by flow cytometry and reduced P. falciparum-IE binding in 3D microvessels. Moreover, there was a threshold of surface antibody reactivity necessary to achieve robust inhibitory activity. Our findings provide evidence of the acquisition of adhesion-blocking antibodies against cerebral binding variants in people exposed to stable P. falciparum transmission and suggest the quality of the inhibitory response can be influenced by flow dynamics.
Insights
Functional antibodies can block Plasmodium falciparum sequestration in the brain, a key feature of cerebral malaria. Antibody levels correlate with reduced parasite binding, indicating acquired immunity against cerebral malaria variants.
Area of Science:
- Immunology
- Infectious Diseases
- Neuroscience
Background:
- Cerebral malaria, a severe complication of Plasmodium falciparum infection, is characterized by parasite-infected erythrocyte sequestration in the brain.
- Antibodies are crucial for malaria immunity, but their role in blocking cytoadhesion in the brain microvasculature remains incompletely understood.
Purpose of the Study:
- To investigate the functional antibody response against Plasmodium falciparum-infected erythrocytes (IEs) and its ability to inhibit cytoadhesion in a human brain microvessel model.
- To determine the correlation between antibody reactivity to IE surface antigens and adhesion-blocking activity.
Main Methods:
- Screening of plasma from Malawian children and young adults for antibodies targeting the P. falciparum-IE surface using flow cytometry.
- Utilizing a bioengineered 3D human brain microvessel model with variable flow dynamics to quantify IE adhesion and measure antibody-mediated inhibition.
Main Results:
- A strong correlation was observed between high surface antibody reactivity and reduced P. falciparum-IE binding in the 3D brain microvessel model.
- A specific threshold of surface antibody reactivity was necessary to achieve significant inhibition of IE adhesion.
- Flow dynamics within the microvessels influenced the quality of the antibody-mediated inhibitory response.
Conclusions:
- Individuals exposed to stable P. falciparum transmission acquire functional antibodies that can block IE cytoadhesion to the brain vasculature.
- The efficacy of these adhesion-blocking antibodies is dependent on their reactivity level and influenced by microenvironmental factors like flow dynamics.
- These findings highlight the potential of targeting adhesion mechanisms for cerebral malaria prevention and treatment.
More Related Videos
07:27A Simple Protocol for Platelet-mediated Clumping of Plasmodium falciparum-infected Erythrocytes in a Resource Poor Setting
Published on: May 16, 2013
09:04In Vivo Tracking of Edema Development and Microvascular Pathology in a Model of Experimental Cerebral Malaria Using Magnetic Resonance Imaging
Published on: June 8, 2017
