Tags

Type your tag names separated by a space and hit enter

In vitro and in vivo effects of 2-methoxyestradiol, either alone or combined with albendazole, against Echinococcus metacestodes.
Exp Parasitol. 2008 Aug; 119(4):475-82.EP

Abstract

The metacestode (larval) stage of the tapeworm Echinococcus multilocularis causes alveolar echinococcosis (AE), a mainly hepatic disease characterized by continuous asexual proliferation of metacestodes by exogenous budding, resulting in the tumor-like, infiltrative growth of the parasite lesion. Current chemotherapeutical treatment of AE relies on the use of benzimidazoles (albendazole, mebendazole), but these drugs act parasitostatic rather than parasitocidal, and in case of side effects such as liver toxicity, patients are left without valuable alternatives. 2-ME2 is a natural metabolite of estradiol, with a documented anti-angiogenic and broad spectrum anti-tumour activity. Treatments of in vitro cultured E. multilocularis metacestodes with 2-ME2 (2-10 microM) showed that the drug has an adverse effect on parasite viability. First, 2-ME in vitro treatment downscaled the transcription of the 14-3-3-pro-tumorogenic zeta-isoform in E. multilocularis metacestodes. Second, scanning and transmission electron microscopy showed that the germinal layer of E. multilocularis metacestodes was dramatically damaged following 2-ME2-treatment, and the effect was dose-dependent. Similar results were obtained with E. granulosus metacestodes. Bioassays were performed in mice injected with 2-ME2-treated and albendazole-treated metacestodes, or parasites-treated with both 2-ME and albendazole in combination. These assays indicated that, despite inducing considerable damage in vitro, neither of the drugs was capable of exerting a true parasiticidal effect, but best results were achieved with a combination of both compounds. In vivo treatment in E. multilocularis-infected mice for a period of 6 weeks showed that a combined 2-ME2/albendazole based treatment lead to a reduction in parasite weight, but the results did not show statistical difference from the application of albendazole alone.

Authors+Show Affiliations

Institute of Parasitology, Vetsuisse Faculty, University of Berne, Länggass-Strasse 122, CH-3012 Berne, Switzerland. martin.spicher@ipa.unibe.chNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

18442817

Citation

Spicher, Martin, et al. "In Vitro and in Vivo Effects of 2-methoxyestradiol, Either Alone or Combined With Albendazole, Against Echinococcus Metacestodes." Experimental Parasitology, vol. 119, no. 4, 2008, pp. 475-82.
Spicher M, Naguleswaran A, Ortega-Mora LM, et al. In vitro and in vivo effects of 2-methoxyestradiol, either alone or combined with albendazole, against Echinococcus metacestodes. Exp Parasitol. 2008;119(4):475-82.
Spicher, M., Naguleswaran, A., Ortega-Mora, L. M., Müller, J., Gottstein, B., & Hemphill, A. (2008). In vitro and in vivo effects of 2-methoxyestradiol, either alone or combined with albendazole, against Echinococcus metacestodes. Experimental Parasitology, 119(4), 475-82. https://doi.org/10.1016/j.exppara.2008.02.012
Spicher M, et al. In Vitro and in Vivo Effects of 2-methoxyestradiol, Either Alone or Combined With Albendazole, Against Echinococcus Metacestodes. Exp Parasitol. 2008;119(4):475-82. PubMed PMID: 18442817.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - In vitro and in vivo effects of 2-methoxyestradiol, either alone or combined with albendazole, against Echinococcus metacestodes. AU - Spicher,Martin, AU - Naguleswaran,Arunasalam, AU - Ortega-Mora,Luis M, AU - Müller,Joachim, AU - Gottstein,Bruno, AU - Hemphill,Andrew, Y1 - 2008/03/07/ PY - 2007/11/25/received PY - 2008/02/19/revised PY - 2008/02/25/accepted PY - 2008/4/30/pubmed PY - 2008/7/22/medline PY - 2008/4/30/entrez SP - 475 EP - 82 JF - Experimental parasitology JO - Exp. Parasitol. VL - 119 IS - 4 N2 - The metacestode (larval) stage of the tapeworm Echinococcus multilocularis causes alveolar echinococcosis (AE), a mainly hepatic disease characterized by continuous asexual proliferation of metacestodes by exogenous budding, resulting in the tumor-like, infiltrative growth of the parasite lesion. Current chemotherapeutical treatment of AE relies on the use of benzimidazoles (albendazole, mebendazole), but these drugs act parasitostatic rather than parasitocidal, and in case of side effects such as liver toxicity, patients are left without valuable alternatives. 2-ME2 is a natural metabolite of estradiol, with a documented anti-angiogenic and broad spectrum anti-tumour activity. Treatments of in vitro cultured E. multilocularis metacestodes with 2-ME2 (2-10 microM) showed that the drug has an adverse effect on parasite viability. First, 2-ME in vitro treatment downscaled the transcription of the 14-3-3-pro-tumorogenic zeta-isoform in E. multilocularis metacestodes. Second, scanning and transmission electron microscopy showed that the germinal layer of E. multilocularis metacestodes was dramatically damaged following 2-ME2-treatment, and the effect was dose-dependent. Similar results were obtained with E. granulosus metacestodes. Bioassays were performed in mice injected with 2-ME2-treated and albendazole-treated metacestodes, or parasites-treated with both 2-ME and albendazole in combination. These assays indicated that, despite inducing considerable damage in vitro, neither of the drugs was capable of exerting a true parasiticidal effect, but best results were achieved with a combination of both compounds. In vivo treatment in E. multilocularis-infected mice for a period of 6 weeks showed that a combined 2-ME2/albendazole based treatment lead to a reduction in parasite weight, but the results did not show statistical difference from the application of albendazole alone. SN - 1090-2449 UR - https://www.unboundmedicine.com/medline/citation/18442817/In_vitro_and_in_vivo_effects_of_2_methoxyestradiol_either_alone_or_combined_with_albendazole_against_Echinococcus_metacestodes_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0014-4894(08)00061-1 DB - PRIME DP - Unbound Medicine ER -