Targeting protein translation, RNA splicing, and degradation by morpholino-based conjugates in Plasmodium falciparum Academic Article uri icon


MeSH Major

  • Morpholinos
  • Plasmodium falciparum
  • Protein Biosynthesis
  • Proteolysis
  • RNA Splicing


  • Identification and genetic validation of new targets from available genome sequences are critical steps toward the development of new potent and selective antimalarials. However, no methods are currently available for large-scale functional analysis of the Plasmodium falciparum genome. Here we present evidence for successful use of morpholino oligomers (MO) to mediate degradation of target mRNAs or to inhibit RNA splicing or translation of several genes of P. falciparum involved in chloroquine transport, apicoplast biogenesis, and phospholipid biosynthesis. Consistent with their role in the parasite life cycle, down-regulation of these essential genes resulted in inhibition of parasite development. We show that a MO conjugate that targets the chloroquine-resistant transporter PfCRT is effective against chloroquine-sensitive and -resistant parasites, causes enlarged digestive vacuoles, and renders chloroquine-resistant strains more sensitive to chloroquine. Similarly, we show that a MO conjugate that targets the PfDXR involved in apicoplast biogenesis inhibits parasite growth and that this defect can be rescued by addition of isopentenyl pyrophosphate. MO-based gene regulation is a viable alternative approach to functional analysis of the P. falciparum genome.

publication date

  • September 22, 2015



  • Academic Article



  • eng

PubMed Central ID

  • PMC4586866

Digital Object Identifier (DOI)

  • 10.1073/pnas.1515864112

PubMed ID

  • 26351679

Additional Document Info

start page

  • 11935

end page

  • 40


  • 112


  • 38