Encyclopedia of Parasitology

Living Edition
| Editors: Heinz Mehlhorn

Hemozoin

  • Heinz Mehlhorn
Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27769-6_1435-2

Hemozoin (malaria pigment, β-hematin) is the chemically inert crystalline substance produced in the digestive food vacuole of blood-stage malaria parasites. The pigment is visible microscopically in intraerythrocytic stages that are actively degrading hemoglobin. During proteolysis of host erythrocyte hemoglobin, monomeric, toxic heme is released. In order to protect itself, the malaria parasite has evolved a distinct mechanism for detoxification of free heme through its conversion to insoluble and chemically inert β-hematin crystals called hemozoin. Hemozoin is a dark-brown pigment made of dimers of hematin molecules. The mechanism of hemozoin formation is still not well understood. Recent data suggest that in blood-stage malaria parasites, a multiproteinase complex, together with a heme detoxification protein, may mediate the formation of the pigment from heme. Hemozoin is also formed as a detoxification product of hemoglobin digestion in a variety of other blood-feeding parasites,...

Keywords

Malaria Parasite Antimalarial Action Crystalline Substance Digestive Food Food Vacuole 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Further Reading

  1. Boura M et al (2013) The hemozoin conundrum: is malaria pigment immune-activating, inhibiting, or simply a bystander. Trends Parasitol 29:469–476CrossRefPubMedGoogle Scholar
  2. Hänscheid T et al (2007) Haemozoin: from melatonin pigment to drug target, diagnostic tool, and immune modulator. Lancet Inf Dis 7:675–685CrossRefGoogle Scholar
  3. Hempelmann E, Egan TJ (2002) Pigment biocrystallization in Plasmodium falciparum. Trends Parasitol 18:11–15CrossRefPubMedGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.Institut für Zoomorphologie, Zellbiologie und ParasitologieHeinrich-Heine-UniversitätDüsseldorfGermany