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Updated: Sep 3, 2025

An ELISA Based Binding and Competition Method to Rapidly Determine Ligand-receptor Interactions
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Analysis of Antibody Inhibition of PfEMP1 Binding by Competition ELISA

Rebecca W Olsen1, Jennifer Suurbaar2,3,4, Anja Ramstedt Jensen2

  • 1Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, Centre for Medical Parasitology, University of Copenhagen, Copenhagen, Denmark. rwo@gubra.dk.

Methods in Molecular Biology (Clifton, N.J.)
|July 26, 2022
PubMed

Insights

This study details a competition ELISA to detect antibodies that block the binding of Plasmodium falciparum erythrocyte membrane protein 1 (PfEMP1) to human receptors, aiding in understanding immune responses to malaria.

Area of Science:

  • Malariology and Immunology
  • Parasitic Diseases Research

Background:

  • Plasmodium falciparum expresses variant antigens, primarily PfEMP1 proteins, on infected erythrocytes.
  • PfEMP1 proteins are crucial for cytoadherence to host endothelial receptors.
  • These interactions trigger antibody responses during natural malaria infections.

Purpose of the Study:

  • To describe a competition ELISA method.
  • To assay for antibodies that neutralize PfEMP1-receptor binding.

Main Methods:

  • Development and application of a competition ELISA.
  • Utilizing PfEMP1 proteins and their cognate receptors as assay components.

Main Results:

  • The competition ELISA effectively quantifies antibodies neutralizing PfEMP1 binding.
  • This assay provides a tool to study functional antibody responses against PfEMP1.

Conclusions:

  • The described competition ELISA is a valuable tool for assessing anti-PfEMP1 antibody efficacy.
  • This method can contribute to the development of malaria vaccines and therapies targeting PfEMP1.
Keywords:
Anti-adhesionAntibodiesCompetition ELISALigand–receptor interactionMalariaPfEMP1

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