The most lethal form of malaria in humans is caused by Plasmodium falciparum. These parasites invade erythrocytes, a complex process involving multiple ligand-receptor interactions. The parasite makes initial contact with the erythrocyte followed by dramatic deformations linked to the function of the Erythrocyte binding antigen family and P. falciparum reticulocyte binding-like families. We show EBA-175 mediates substantial changes in the deformability of erythrocytes by binding to glycophorin A and activating a phosphorylation cascade that includes erythrocyte cytoskeletal proteins resulting in changes in the viscoelastic properties of the host cell. TRPM7 kinase inhibitors FTY720 and waixenicin A block the changes in the deformability of erythrocytes and inhibit merozoite invasion by directly inhibiting the phosphorylation cascade. Therefore, binding of P. falciparum parasites to the erythrocyte directly activate a signaling pathway through a phosphorylation cascade and this alters the viscoelastic properties of the host membrane conditioning it for successful invasion. DOI: http://dx.doi.org/10.7554/eLife.21083.001
Plasmodium falciparum ligand binding to erythrocytes induce alterations in deformability essential for invasion
X. Sisquella,T. Nebl,Jenn K Thompson,L. Whitehead,B. Malpede,N. Salinas,K. Rogers,N. Tolia,A. Fleig,Joseph O’Neill,Wai-Hong Tham,Wai-Hong Tham,F. D. Horgen,A. Cowman,A. Cowman
Published 2017 in eLife
ABSTRACT
PUBLICATION RECORD
- Publication year
2017
- Venue
eLife
- Publication date
2017-01-18
- Fields of study
Biology, Medicine, Chemistry
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
CITATION MAP
EXTRACTION MAP
CLAIMS
CONCEPTS
- eba-175
A Plasmodium falciparum erythrocyte binding antigen involved in attachment to red blood cells.
Aliases: erythrocyte binding antigen 175
- erythrocyte deformability
The mechanical ability of red blood cells to change shape under force, measured here as a host-cell property.
Aliases: red blood cell deformability
- glycophorin a
A major erythrocyte surface glycoprotein that serves as the binding partner for EBA-175 in this work.
Aliases: GPA
- merozoite invasion
The entry process by which malaria merozoites invade erythrocytes.
Aliases: parasite invasion of erythrocytes
- phosphorylation cascade
A sequence of phosphorylation events in the erythrocyte that is activated downstream of parasite binding in this paper.
Aliases: phosphorylation signaling cascade
- trpm7 kinase inhibitors
Small-molecule inhibitors used here to interfere with TRPM7-associated kinase activity, including FTY720 and waixenicin A.
Aliases: FTY720, waixenicin A
REFERENCES
Showing 1-81 of 81 references · Page 1 of 1
CITED BY
Showing 1-69 of 69 citing papers · Page 1 of 1