A Stem Cell Strategy Identifies Glycophorin C as a Major Erythrocyte Receptor for the Rodent Malaria Parasite Plasmodium berghei

PLoS One. 2016 Jun 30;11(6):e0158238. doi: 10.1371/journal.pone.0158238. eCollection 2016.

Abstract

The clinical complications of malaria are caused by the parasite expansion in the blood. Invasion of erythrocytes is a complex process that depends on multiple receptor-ligand interactions. Identification of host receptors is paramount for fighting the disease as it could reveal new intervention targets, but the enucleated nature of erythrocytes makes genetic approaches impossible and many receptors remain unknown. Host-parasite interactions evolve rapidly and are therefore likely to be species-specific. As a results, understanding of invasion receptors outside the major human pathogen Plasmodium falciparum is very limited. Here we use mouse embryonic stem cells (mESCs) that can be genetically engineered and differentiated into erythrocytes to identify receptors for the rodent malaria parasite Plasmodium berghei. Two proteins previously implicated in human malaria infection: glycophorin C (GYPC) and Band-3 (Slc4a1) were deleted in mESCs to generate stable cell lines, which were differentiated towards erythropoiesis. In vitro infection assays revealed that while deletion of Band-3 has no effect, absence of GYPC results in a dramatic decrease in invasion, demonstrating the crucial role of this protein for P. berghei infection. This stem cell approach offers the possibility of targeting genes that may be essential and therefore difficult to disrupt in whole organisms and has the potential to be applied to a variety of parasites in diverse host cell types.

MeSH terms

  • Animals
  • Anion Exchange Protein 1, Erythrocyte / deficiency*
  • Anion Exchange Protein 1, Erythrocyte / metabolism
  • Cell Differentiation
  • Cell Line
  • Erythropoiesis
  • Glycophorins / deficiency*
  • Glycophorins / metabolism
  • Host-Parasite Interactions
  • Mice
  • Mouse Embryonic Stem Cells / cytology*
  • Mouse Embryonic Stem Cells / metabolism
  • Mouse Embryonic Stem Cells / parasitology
  • Plasmodium berghei / physiology*

Substances

  • Anion Exchange Protein 1, Erythrocyte
  • Glycophorins
  • Slc4a1 protein, mouse

Grants and funding

This work was funded by core funding of the Sanger Institute by the Wellcome Trust.