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Host Cell Actin Remodeling in Response to Trypanosoma cruzi: Trypomastigote Versus Amastigote Entry

  • Renato A. Mortara
  • Walter K. Andreoli
  • Maria Cecília D. C. Fernandes
  • Claudio V. da Silva
  • Adriana B. Fernandes
  • Carolina L’Abbate
  • Solange da Silva
Part of the Subcellular Biochemistry book series (SCBI, volume 47)

Abstract

Trypanosoma cruzi is the protozoan parasite that causes Chagas’ disease, a highly prevalent vector-borne disease in Latin America. Chagas’ disease is a major public health problem in endemic regions with an estimated 18 million people are infected with T. cruzi and another 100 million at risk (http://www.who.int/ctd/chagas/disease.htm). During its life cycle, T. cruzi alternates between triatomine insect vectors and mammalian hosts. While feeding on host’s blood, infected triatomines release in their feces highly motile and infective metacyclic trypomastigotes that may initiate infection. Metacyclic trypomastigotes promptly invade host cells (including gastric mucosa) and once free in the cytoplasm, differentiate into amastigotes that replicate by binary fission. Just before disruption of the parasite-laden cell, amastigotes differentiate back into trypomastigotes which are then released into the tissue spaces and access the circulation. Circulating trypomastigotes that disseminate the infection in the mammalian host may be taken up by feeding triatomines and may also transform, extracellu-larly, into amastigote-like forms.1 Unlike their intracellular counterparts, these amastigote-like forms,2 henceforth called amastigotes, are capable of infecting host cells.3, 4, 5, 6, 7 Studies in which the mechanisms of amastigote invasion of host cells have been compared to metacyclic trypomastigote entry have revealed interesting differences regarding the involvement of the target cell actin microfilament system.

Keywords

HeLa Cell Actin Filament Trypanosoma Cruzi Actin Microfilament Host Cell Invasion 
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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Copyright information

© Landes Bioscience and Springer Science+Business Media 2008

Authors and Affiliations

  • Renato A. Mortara
    • 1
  • Walter K. Andreoli
    • 1
  • Maria Cecília D. C. Fernandes
    • 1
  • Claudio V. da Silva
    • 1
  • Adriana B. Fernandes
    • 1
  • Carolina L’Abbate
    • 1
  • Solange da Silva
    • 1
  1. 1.Disciplina de Parasitologia, Departamento de Microbiologia, Imunologia e ParasitologiaUNIFESP, Escola Paulista de MedicinaSão Paulo, SPBrazil

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