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A membrane network for nutrient import in red cells infected with the malaria parasite

S A Lauer1, P K Rathod, N Ghori

  • 1Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA 94305-5402, USA.

Science (New York, N.Y.)
|May 16, 1997
PubMed

Insights

The malaria parasite Plasmodium falciparum uses a membrane network to import nutrients. This tubovesicular network could be a target for delivering antimalarial drugs directly into the parasite.

Area of Science:

  • Cell Biology
  • Parasitology
  • Molecular Biology

Background:

  • The human malaria parasite, Plasmodium falciparum, resides within red blood cells.
  • Efficient nutrient uptake is crucial for parasite survival and proliferation.
  • The parasite exports a network of tubovesicular membranes (TVM) within the host cell.

Purpose of the Study:

  • To investigate the function of the TVM in nutrient transport.
  • To determine if the TVM can be utilized for drug delivery.

Main Methods:

  • Utilized Lucifer yellow, a fluorescent dye, to trace solute uptake.
  • Blocked TVM assembly to assess its role in transport.
  • Monitored the delivery of nucleosides and amino acids.

Main Results:

  • Extracellular solutes, including Lucifer yellow, were observed entering the TVM and reaching the parasite.
  • Inhibition of TVM assembly prevented the uptake of exogenous Lucifer yellow, nucleosides, and amino acids.
  • Secretion of parasite proteins remained unaffected by the blockage of TVM assembly.

Conclusions:

  • The TVM functions as a transport network facilitating nutrient access to the parasite.
  • The TVM represents a potential pathway for targeted delivery of antimalarial drugs directly into Plasmodium falciparum.

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