LSTM Home > LSTM Research > LSTM Online Archive

A Novel Domain Cassette Identifies Plasmodium falciparum PfEMP1 Proteins Binding ICAM-1 and Is a Target of Cross-Reactive, Adhesion-Inhibitory Antibodies.

Bengtsson, Anja, Joergensen, Louise, Rask, Thomas S, Olsen, Rebecca W, Andersen, Marianne A, Turner, Louise, Theander, Thor G, Hviid, Lars, Higgins, Matthew K, Craig, Alister ORCID: https://orcid.org/0000-0003-0914-6164, Brown, Alan and Jensen, Anja T R (2013) 'A Novel Domain Cassette Identifies Plasmodium falciparum PfEMP1 Proteins Binding ICAM-1 and Is a Target of Cross-Reactive, Adhesion-Inhibitory Antibodies.'. The Journal of Immunology, Vol 190, Issue 1, pp. 240-249.

Full text not available from this repository.

Abstract

Cerebral Plasmodium falciparum malaria is characterized by adhesion of infected erythrocytes (IEs) to the cerebral microvasculature. This has been linked to parasites expressing the structurally related group A subset of the P. falciparum erythrocyte membrane protein 1 (PfEMP1) family of IE adhesion ligands and to IEs with affinity for ICAM-1. However, recent evidence has cast doubt on both these associations, tempering hopes of the feasibility of developing a vaccine based on ICAM-1-binding PfEMP1. In this study, we report the identification of a domain cassette (DC) present in group A var genes from six genetically distinct P. falciparum parasites. The three domains in the cassette, which we call DC4, had a high level of sequence identity and cluster together phylogenetically. Erythrocytes infected by these parasites and selected in vitro for expression of DC4 adhered specifically to ICAM-1. The ICAM-1-binding capacity of DC4 was mapped to the C-terminal third of its Duffy-binding-like β3 domain. DC4 was the target of broadly cross-reactive and adhesion-inhibitory IgG Abs, and levels of DC4-specific and adhesion-inhibitory IgG increased with age among P. falciparum-exposed children. Our study challenges earlier conclusions that group A PfEMP1 proteins are not central to ICAM-1-specific IE adhesion and support the feasibility of developing a vaccine preventing cerebral malaria by inhibiting cerebral IE sequestration.

Item Type: Article
Subjects: QU Biochemistry > Genetics > QU 500 Genetic phenomena
QU Biochemistry > Proteins. Amino Acids. Peptides > QU 58.5 DNA.
QW Microbiology and Immunology > Antigens and Antibodies. Toxins and Antitoxins > QW 575 Antibodies
QX Parasitology > Protozoa > QX 135 Plasmodia
WC Communicable Diseases > Tropical and Parasitic Diseases > WC 750 Malaria
WH Hemic and Lymphatic Systems > Hematologic Diseases. Immunologic Factors. Blood Banks > WH 150 Erythrocytes
Faculty: Department: Biological Sciences > Department of Tropical Disease Biology
Digital Object Identifer (DOI): https://doi.org/10.4049/jimmunol.1202578
Depositing User: Mary Creegan
Date Deposited: 27 Mar 2013 15:00
Last Modified: 17 Jul 2019 14:14
URI: https://archive.lstmed.ac.uk/id/eprint/3247

Statistics

View details

Actions (login required)

Edit Item Edit Item