Related Experiment Video
Updated: Feb 14, 2026

An In Vitro Model for Measuring Immune Responses to Malaria in the Context of HIV Co-infection
Published on: October 6, 2015
Clonal selection drives protective memory B cell responses in controlled human malaria infection
Rajagopal Murugan1, Lisa Buchauer2,3,4, Gianna Triller1
1B Cell Immunology, German Cancer Research Center, Heidelberg, Germany.
Repeated exposure to malaria parasite (Plasmodium falciparum) boosts B cell memory responses. Clonal selection of B cell precursors, rather than affinity maturation, drives memory development against complex antigens like PfCSP.
Area of Science:
- Immunology
- Vaccinology
Background:
- Affinity maturation is crucial for protective B cell memory responses.
- Repeated antigen exposure enhances affinity maturation but also recruits naive B cells.
Purpose of the Study:
- To determine the relative impact of affinity maturation versus clonal selection of naive B cells on B cell memory responses to Plasmodium falciparum (Pf) after repeated antigen exposure in humans.
Main Methods:
- Single-cell immunoglobulin (Ig) gene sequencing.
- Production of recombinant monoclonal antibodies.
- Analysis of B cell responses to Pf circumsporozoite protein (PfCSP) after PfSPZ Challenge (PfSPZ-CVac).
Main Results:
- Clonal selection of B cell precursors outpaced affinity maturation in anti-PfCSP responses.
- The majority of Ig gene mutations were affinity-neutral.
- Mathematical modeling indicated decreased affinity maturation efficiency with antigen complexity.
Conclusions:
- Antigen-reactive precursor frequency and activation likelihood are key determinants of anti-PfCSP memory B cell quality.
- Findings impact vaccination strategies for complex antigens like PfCSP.
More Related Videos
10:21Population Replacement Strategies for Controlling Vector Populations and the Use of Wolbachia pipientis for Genetic Drive
Published on: July 4, 2007
15:03Building a Better Mosquito: Identifying the Genes Enabling Malaria and Dengue Fever Resistance in A. gambiae and A. aegypti Mosquitoes
Published on: July 4, 2007
Related Concept Videos
T Cell Activation and Clonal Selection
Naive T cells that have not yet encountered an antigen express two primary CD...
Dose-Response Relationship: Selectivity and Specificity
Humoral Immune Responses
Energy to Drive Translocation
Generally, polypeptides are unfolded by two distinct...
Responses to Salt Stress
System of Memory