Thaïs Cristina Souto-Padrón

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A monospecific polyclonal antibody obtained against a cysteine proteinase isolated from epimastigotes of Trypanosoma cruzi was used for the immunocytochemical localization of the protein by electron microscopy and to analyse the role played by cysteine proteinase in the process of T. cruzi-host cell interaction. Cytoplasmic structures that correspond to(More)
At present, noncoding small RNAs are recognized as key players in novel forms of posttranscriptional gene regulation in most eukaryotes. However, canonical small RNA pathways seem to be lost or excessively simplified in some unicellular organisms including Trypanosoma cruzi which lack functional RNAi pathways. Recently, we reported the presence of alternate(More)
Trypanosomatids cause many diseases in and on animals (including humans) and plants. Altogether, about 37 million people are infected with Trypanosoma brucei (African sleeping sickness), Trypanosoma cruzi (Chagas disease) and Leishmania species (distinct forms of leishmaniasis worldwide). The class Kinetoplastea is divided into the subclasses(More)
Protozoan parasites cause disease in humans worldwide, and many fall into the genera Trypanosoma and Leishmania; these parasites are responsible for African trypanosomiasis, Chagas disease and the different forms of Leishmaniasis. Strategies for the development of new drugs against these protozoans have been based on their cell biology and biochemistry(More)
Peptidases are a group of enzymes which have a catalytic function that is to hydrolyze peptide bonds of proteins. The enzymes that hydrolyze peptide bonds at the amino-or carboxy-terminus are classified as exopeptidases, and those that cleave peptide bonds inside the polypeptide are endopeptidases. Endopeptidases, such as cysteine-, metalo-, ser-ine-and(More)
BACKGROUND Human cutaneous leishmaniasis is caused by distinct species, including Leishmania amazonensis. Treatment of cutaneous leishmaniasis is far from satisfactory due to increases in drug resistance and relapses, and toxicity of compounds to the host. As a consequence for this situation, the development of new leishmanicidal drugs and the search of new(More)
Phytomonas species are plant parasites of the family Trypanosomatidae, which are transmitted by phytophagous insects. Some Phytomonas species cause major agricultural damages. The hemipteran Oncopeltus fasciatus is natural and experimental host for several species of trypanosomatids, including Phytomonas spp. The invasion of the insect vectors' salivary(More)
BACKGROUND Trypanosoma cruzi is the causative agent of the life-threatening Chagas disease, in which increased platelet aggregation related to myocarditis is observed. Platelet-activating factor (PAF) is a potent intercellular lipid mediator and second messenger that exerts its activity through a PAF-specific receptor (PAFR). Previous data from our group(More)
  • Angela H Lopes, Marta T Gomes, Fernando L Dutra, Alane B Vermelho, José R Meyer-Fernandes, Mário A C Silva-Neto +2 others
  • 2010
Knowledge of cell signaling pathways in trypanosomatids is crucial for the future design of new drugs to treat diseases caused by these parasites. The publication of the complete genome sequences of three pathogenic trypanosomat-ids, Trypanosoma brucei, T. cruzi and Leishmania major, revealed numerous protein members of signaling pathways that modulate(More)
The genus Phytomonas includes parasites that are etiological agents of important plant diseases, especially in Central and South America. These parasites are transmitted to plants via the bite of an infected phytophagous hemipteran. Despite the economic impact of these parasites, many basic questions regarding the genus Phytomonas remain unanswered, such as(More)