Charakterizace serinových proteáz u motolice Schistosoma mansoni participujících na interakci s hostitelem

Ulrychová, Lenka

Schistosomiasis is a serious parasitic disease, caused by blood flukes of the genus Schistosoma. It remains a global health problem in the 21st century, with more than 250 million people infected in 78 countries. Current therapy relies on the drugs praziquantel and oxamniquine, for which there are concerns of emerging drug resistance. Proteases of schistosomes are involved in critical steps of host-parasite interactions and are promising targets for the development of new therapeutic strategies against schistosomiasis. This work focuses on the characterization of Schistosoma mansoni serine proteases (SmSPs) and the determination of their role in the interaction with the human host using a variety of genomic, bioinformatic, RNA- and protein-based techniques. First, the major types of proteolytic activities secreted by the blood-dwelling developmental stages of S. mansoni were classified using functional proteomics. The analysis revealed the complexity of proteolytic activities secreted by the schistosome life stages parasitizing the human host. All stages secreted significant serine protease activities, and consequently their genes were retrieved from the genome database and annotated. Localization in adult worms determined by fluorescence in situ RNA hybridization revealed complex expression...

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