Abstract
Entamoeba histolytica remains a cause of significant morbidity and mortality in many countries. Although metronidazole has been used for the treatment of amoebiasis for several decades, little is known on how the amoebae react to this challenge on the levels of mRNA and protein expression. In this study, we examined their response using a focused microarray, quantitative RT-PCR, and two-dimensional gel electrophoresis (2DE). The amoebae modestly increased the levels of mRNA coding for superoxide dismutase, peroxiredoxin, ferredoxin, thioredoxin reductase, and the galactose/ N-acetylgalactosamine specific lectin light and heavy chains. The mRNAs encoding actin and the 70 kDa and 101 kDa heat shock proteins were decreased. All the changes occured within 1 h of exposition, with very little further changes. In addition, the proteome revealed only very few changes. Taken together, E. histolytica appears to make only modest mRNA and protein expression changes when confronted with an unknown chemical stress.
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