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The effect of TAO expression on PCD-like phenomenon development and drug resistance in Trypanosoma brucei

Akiko Tsuda1, William H Witola, Satoru Konnai

  • 1Laboratory of Infectious Disease, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan.

Parasitology International
|March 7, 2006
PubMed

Insights

Overexpressing TAO in Trypanosoma brucei inhibits programmed cell death (PCD) and confers resistance to drugs like suramin and antrycide. This suggests TAO plays a key role in drug resistance mechanisms.

Area of Science:

  • Molecular Biology
  • Parasitology
  • Biochemistry

Background:

  • Drug resistance in Trypanosoma brucei poses significant challenges for human and animal health.
  • The molecular mechanisms underlying drug resistance, particularly the role of programmed cell death (PCD), are not fully understood.
  • Previous research suggests TAO expression may inhibit PCD-like phenomena in T. brucei.

Purpose of the Study:

  • To investigate the correlation between TAO gene expression and the development of PCD in T. brucei.
  • To determine if TAO over-expression influences drug resistance in T. brucei.

Main Methods:

  • Genetic engineering of T. brucei to achieve conditional over-expression of the TAO gene.
  • Comparison of PCD development between transgenic and wild-type T. brucei.
  • Assessment of drug resistance in transgenic cells against suramin and antrycide.
  • Measurement of intracellular reactive oxygen species (ROS) levels.

Main Results:

  • TAO over-expressing T. brucei exhibited reduced PCD development compared to wild-type.
  • Transgenic cells demonstrated resistance to suramin and antrycide.
  • Augmentation of ROS was lower in transgenic cells after antrycide treatment, suggesting ROS involvement in resistance.

Conclusions:

  • TAO expression appears to regulate PCD development in T. brucei.
  • TAO over-expression correlates with increased resistance to specific anti-trypanosomal drugs.
  • These findings suggest a potential link between PCD regulation and drug resistance in T. brucei, with implications for therapeutic strategies.

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