@article{CucherMaricontiManciullietal.2023, author = {Cucher, Marcela A. and Mariconti, Mara and Manciulli, Tommaso and Vola, Ambra and Rosenzvit, Mara C. and Brehm, Klaus and Kamenetzky, Laura and Brunetti, Enrico}, title = {Circulating small RNA profiling of patients with alveolar and cystic echinococcosis}, series = {Biology}, volume = {12}, journal = {Biology}, number = {5}, issn = {2079-7737}, doi = {10.3390/biology12050715}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-319270}, year = {2023}, abstract = {Alveolar (AE) and cystic (CE) echinococcosis are two parasitic diseases caused by the tapeworms Echinococcus multilocularis and E. granulosus sensu lato (s. l.), respectively. Currently, AE and CE are mainly diagnosed by means of imaging techniques, serology, and clinical and epidemiological data. However, no viability markers that indicate parasite state during infection are available. Extracellular small RNAs (sRNAs) are short non-coding RNAs that can be secreted by cells through association with extracellular vesicles, proteins, or lipoproteins. Circulating sRNAs can show altered expression in pathological states; hence, they are intensively studied as biomarkers for several diseases. Here, we profiled the sRNA transcriptomes of AE and CE patients to identify novel biomarkers to aid in medical decisions when current diagnostic procedures are inconclusive. For this, endogenous and parasitic sRNAs were analyzed by sRNA sequencing in serum from disease negative, positive, and treated patients and patients harboring a non-parasitic lesion. Consequently, 20 differentially expressed sRNAs associated with AE, CE, and/or non-parasitic lesion were identified. Our results represent an in-depth characterization of the effect E. multilocularis and E. granulosus s. l. exert on the extracellular sRNA landscape in human infections and provide a set of novel candidate biomarkers for both AE and CE detection.}, language = {en} } @phdthesis{Koike2023, author = {Koike, Akito}, title = {Molekular und zellbiologischer Ansatz hin zu neuartigen Medikamenten gegen \(Echinococcus\) \(multilocularis\)}, doi = {10.25972/OPUS-28864}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-288649}, school = {Universit{\"a}t W{\"u}rzburg}, year = {2023}, abstract = {Echinococcosis is an important zoonosis. The causative agent of Alveolar Echinococcosis (AE) is Echinococcus multilocularis. The treatment of human AE is limited to surgery and chemotherapy with albendazole (ABZ). However, ABZ works only parasitostatically and it needs to be taken for long periods, although it causes adverse side effects. Thus, development of new, parasiticidal drug with selective toxicity is required. Because undifferentiated stem cells of E. multilocularis play key role in its longevity and regenerative capacity, targeting stem cells is especially important. In vitro screening of protein kinases inhibitors demonstrated that human PIM kinases inhibitors have detrimental effects on E. multilocularis. Through yeast two hybrid assay, the interaction of parasite PIM kinase (EmPIM) and its CDC25 (EmCDC25) was indicated. Through in situ hybridization, expression of EmPIM in the stem cells was observed. Therefore, EmPim is likely to be a positive regulator of cell cycle progression, the same as human Pim1. In addition, 20 compounds against EmPIM were selected through in silico screening and synthesized. One of them has a detrimental effect on E.multilocularis comparable to human pan-PIM inhibitors, but has much weaker toxicity on human cell lines. Furthermore, triclabendazole (TCBZ) and its metabolite TCBZSX, which are approved for another flatworm disease, Fascioliasis were tried on E. multilocularis. With two stem cell markers, damage to stem cells by TCBZSX was shown. In addition, primary cells from treated vesicles never regenerated and the damage to stem cells proved to be irreversible. Our in silico screening method used in EmPIM research has potential to identify compounds which overcome the side effect problem in ABZ-based chemotherapy. On the other hand, it is expected that my research of TCBZ can lead to development of a practical parasiticidal chemotherapy by combining TCBZ, which damages stem cells, and ABZ, which damages differentiated cells.}, subject = {Bandw{\"u}rmer}, language = {en} }