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The erythrocyte membrane properties of beta thalassaemia heterozygotes and their consequences for Plasmodium falciparum invasion

Published version
Peer-reviewed

Type

Article

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Authors

Marin-Menendez, Alejandro 
Nettesheim, Guilherme 
Lin, Yen-Chun 

Abstract

Malaria parasites such as Plasmodium falciparum have exerted formidable selective pressures on the human genome. Of the human genetic variants associated with malaria protection, beta thalassaemia (a haemoglobinopathy) was the earliest to be associated with malaria prevalence. However, the malaria protective properties of beta thalassaemic erythrocytes remain unclear. Here we studied the mechanics and surface protein expression of beta thalassaemia heterozygous erythrocytes, measured their susceptibility to P. falciparum invasion, and calculated the energy required for merozoites to invade them. We found invasion-relevant differences in beta thalassaemic cells versus matched controls, specifically: elevated membrane tension, reduced bending modulus, and higher levels of expression of the major invasion receptor basigin. However, these differences acted in opposition to each other with respect to their likely impact on invasion, and overall we did not observe beta thalassaemic cells to have lower P. falciparum invasion efficiency for any of the strains tested.

Description

Keywords

Rare Diseases, Vector-Borne Diseases, Infectious Diseases, Malaria, 2.1 Biological and endogenous factors, 2 Aetiology, Infection

Journal Title

Scientific Reports

Conference Name

Journal ISSN

2045-2322

Volume Title

Publisher

Nature Publishing Group