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Cellular localization of Babesia bovis rhoptry-associated protein 1 in the merozoite stage with immuno-electron microscopy OAK
Matsuo, Tomohide; Yokoyama, Naoaki; Suthisak, Boonchit; Fujisaki, Kozo; Igarashi, Ikuo.
We examined the detailed cellular localization of the rhoptry-associated protein-1 (RAP-1) of Babesia bovis merozoites by the post-embedding method of immuno-electron microscopy (IEM) using the anti-RAP-1 monoclonal antibody (mAb) 1C1 in order to substantiate the result in our previous report by an indirect immunofluorescent antibody test and the pre-embedding method of IEM. RAP-1 slightly distributed only in cytoplasm of merozoites, especially around the nucleus, but not in the rhoptry organelle at an early stage after invasion into a red blood cell. Then, the RAP-1 was accumulated in the rhoptry organelle and was also found in the iRBC cytoplasm, which suggests that synthesis and release of RAP-1 may occur in the iRBC. Finally, the RAP-1 was found within...
Palavras-chave: Babesia bovis RAP-1 invasion; Escape RBC.
Ano: 2005 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/145
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Characterization of a novel thrombospondin-related protein in Toxoplasma gondii OAK
Kawase, Osamu; Nishikawa, Yoshifumi; Bannai, Hiroshi; Matsuo, Tomohide; Xuan, Xuenan.
Toxoplasma gondii is an obligate intracellular protozoan parasite that invades a wide range of host cells. Upon encountering host cells, the parasite releases a large variety of proteins from secretory organelles, such as micronemes, rhoptries and dense granules. The secretion of microneme protein is essential for parasite invasion. We found that a secreted protein with an altered thrombospondin repeat of Toxoplasma gondii (TgSPATR) was a novel microneme protein, which was different from known microneme proteins that carry thrombospondin repeat domains. TgSPATR was secreted in response to an intra-parasitic elevation of Ca2+ and probably secreted during early stages of parasite invasion. Thus, we suggested that TgSPATR, new member of microneme secretory...
Palavras-chave: Ca2+-dependent secretion; Microneme protein; Secreted protein with an alteredthrombospondin repeat; Toxoplasma gondii.
Ano: 2010 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2819
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TICK REPRODUCTION IN A MALE TICK, HAEMAPHYSALIS LONGICORNIS (ACARI : IXODIDAE) OAK
Matsuo, Tomohide; Fujisaki, Kozo.
Palavras-chave: Spermatogenic cell; Spermatophore; Accessory gland; Male; Haemaphysalis longicornis.
Ano: 2003 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/630
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