Cryopreservation of Toxoplasma gondii Tachyzoites and Tissue Cysts

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[Cryopreservation of Toxoplasma gondii tachyzoites and tissue cysts].

Toxoplasma gondii tachyzoites and tissue cysts are largely used for developing diagnostic assays, vaccines and in drug research as well as biochemical and molecular structure studies. Continuous passaging of tachyzoites or tissue cysts in animal models encounter ethical and economical problems and it is a time consuming procedure. Cryopreservation of tachyzoites and tissue cysts and revitalizat...

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Acidocalcisomes in Toxoplasma gondii tachyzoites.

Toxoplasma gondii tachyzoites were loaded with the fluorescent indicator fura 2 to investigate the transport mechanisms involved in maintaining their intracellular Ca2+ homoeostasis. The mitochondrial ATPase inhibitor oligomycin and the endoplasmic-reticulum Ca(2+)-ATPase inhibitor thapsigargin increased the intracellular Ca2+ concentration ([Ca2+]i), thus indicating the requirement for ATP and...

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Remarkable in vitro and in vivo activities of the hydroxynaphthoquinone 566C80 against tachyzoites and tissue cysts of Toxoplasma gondii.

Compound 566C80, 2-[trans-4-(4-chlorophenyl)cyclohexyl]-3-hydroxy-1,4-naphthoquinone, was studied for its in vitro and in vivo activities against Toxoplasma gondii. Replication within human foreskin fibroblasts of tachyzoites of seven different strains, five of them isolated from AIDS patients, was inhibited by concentrations as low as 4.8 x 10(-9) M. In vivo, a dose of 100 mg/kg of body weight...

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Optimization of the cryopreservation of biological resources, Toxoplasma gondii tachyzoites, using flow cytometry.

The conservation of Toxoplasma gondii strains isolated from humans and animals is essential for conducting studies on Toxoplasma. Conservation is the main function of the French Biological Toxoplasma Resource Centre (BRC Toxoplasma, France, http://www.toxocrb.com/). In this study, we have determined the suitability of a standard cryopreservation methodology for different Toxoplasma strains usin...

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Immunogenicity of Gamma-Irradiated Toxoplasma gondii Tachyzoites in Mice

The Immunogenicity of γ-irradiated tachyzoites of a highly virulent strain of Toxoplasma gondii (RH strain) was investigated. Immunized mice survived challenge infection and displayed increased interferon gamma (INF-γ ) production. On the other hand, nonimmunized controls died after 10 days and displayed a significantly decreased lymphoproliferative response to Concanavalin A (Con A). No tachyz...

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ژورنال

عنوان ژورنال: Turkish Journal of Parasitology

سال: 2013

ISSN: 1300-6320,2146-3077

DOI: 10.5152/tpd.2013.11