Parasitology Research

, Volume 101, Issue 5, pp 1355–1363

Sequence diversity and differential expression of Tc52 immuno-regulatory protein in Trypanosoma cruzi: potential implications in the biological variability of strains

  • Françoise Mathieu-Daudé
  • Marie-France Bosseno
  • Edwin Garzon
  • Joël Lelièvre
  • Denis Sereno
  • Ali Ouaissi
  • Simone Frédérique Brenière
Original Paper

DOI: 10.1007/s00436-007-0651-3

Cite this article as:
Mathieu-Daudé, F., Bosseno, MF., Garzon, E. et al. Parasitol Res (2007) 101: 1355. doi:10.1007/s00436-007-0651-3

Abstract

Trypanosoma cruzi is highly heterogeneous in terms of genetics and biological properties. To explore the diversity of T. cruzi, we focused our study on the T. cruzi Tc52 protein playing a critical immunosuppressive role during infection. Sequence variability and expression levels of this virulence factor were analysed in various strains. Among the 40 amino acid substitutions detected in the Tc52 coding sequences, three substitutions may have an impact on protein activity or function, as two are localized in sites involved in the glutathione binding and the third is present in the region bearing immunomodulatory function. This sequence variability was consistent with the genetic subdivisions of T. cruzi. Moreover, we observed that the level of Tc52 transcripts and proteins varied between the different strains, but we did not find a significant correlation between Tc52 expression and the phylogeny of the parasite. Thus, both diversity in the sequences and differences in the expression levels of Tc52 protein may be involved in the biological variability of T. cruzi, especially in virulence and immunosuppression properties of T. cruzi strains.

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Françoise Mathieu-Daudé
    • 1
  • Marie-France Bosseno
    • 1
  • Edwin Garzon
    • 1
  • Joël Lelièvre
    • 2
  • Denis Sereno
    • 1
  • Ali Ouaissi
    • 1
  • Simone Frédérique Brenière
    • 1
  1. 1.Département Sociétés et Santé, UR008 Pathogénie et Epidémiologie des TrypanosomatidésInstitut de Recherche pour le DéveloppementMontpellier cedex 5France
  2. 2.Laboratoire de Chimie de Coordination du CNRSToulouse 4France

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