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Hemozoin-catalyzed precipitation polymerization as an assay for malaria diagnosis

  • Rifaie-Graham, Omar Adolphe Merkle Institute, University of Fribourg, Switzerland
  • Pollard, Jonas Adolphe Merkle Institute, University of Fribourg, Switzerland
  • Raccio, Samuel Adolphe Merkle Institute, University of Fribourg, Switzerland
  • Balog, Sandor Adolphe Merkle Institute, University of Fribourg, Switzerland
  • Rusch, Sebastian Swiss Tropical and Public Health Institute, Basel, Switzerland - University of Basel, Basel, Switzerland
  • Hernández-Castañeda, María Andrea Department of Medicine, University of Fribourg, Switzerland
  • Mantel, Pierre-Yves Department of Medicine, University of Fribourg, Switzerland
  • Beck, Hans-Peter Swiss Tropical and Public Health Institute, Basel, Switzerland - University of Basel, Basel, Switzerland
  • Bruns, Nico Adolphe Merkle Institute, University of Fribourg, Switzerland
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    25.03.2019
Published in:
  • Nature Communications. - 2019, vol. 10, no. 1, p. 1369
English Methods to diagnose malaria are of paramount interest to eradicate the disease. Current methods have severe limitations, as they are either costly or not sensitive enough to detect low levels of parasitemia. Here we report an ultrasensitive, yet low- resource chemical assay for the detection and quantification of hemozoin, a biomarker of all Plasmodium species. Solubilized hemozoin catalyzes the atom transfer radical polymerization of N-isopropylacrylamide above the lower critical solution temperature of poly(N-isopropylacrylamide). The solution becomes turbid, which can be observed by naked eye and quantified by UV-visible spectroscopy. The rate of turbidity increase is proportional to the concentration of hemozoin, with a detection limit of 0.85 ng  mL−1. Malaria parasites in human blood can be detected down to 10 infected red blood cells μL−1. The assay could potentially be applied as a point-of-care test. The signal-amplification of an analyte by biocatalytic precipitation polymerization represents a powerful approach in biosensing.
Faculty
Faculté des sciences et de médecine
Department
Département de Médecine
Language
  • English
Classification
Biology
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/307790
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