Modulation of mouse macrophage proteome induced by Toxoplasma gondii tachyzoites in vivo
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Toxoplasma gondii is an obligate intracellular protozoan parasite, which can invade and multiply within the macrophages of humans and most warm-blooded animals. Macrophages are important effector cells for the control and killing of intracellular T. gondii, and they may also serve as long-term host cells for the replication and survival of the parasite. In the present study, we explored the proteomic profile of macrophages of the specific pathogen-free Kunming mice at 24 h after infection with tachyzoites of the virulent T. gondii RH strain using two-dimensional gel electrophoresis combined with matrix-assisted laser desorption ionization time-of-flight (TOF)/TOF tandem mass spectrometry. Totally, 60 differentially expressed protein spots were identified. Among them, 52 spots corresponded to 38 proteins matching to proteins of the mouse, including actin, enolase, calumenin, vimentin, plastin 2, annexin A1, cathepsin S, arginase-1, arachidonate 12-lipoxygenase, and aminoacylase-1. Functional prediction using Gene Ontology database showed that these proteins were mainly involved in metabolism, structure, protein fate, and immune responses. The findings provided an insight into the interactive relationship between T. gondii and the host macrophages, and will shed new lights on the understanding of molecular mechanisms of T. gondii pathogenesis.
KeywordsInfected Macrophage Kunming Mouse Host Macrophage Express Protein Spot Gene Ontology Database
This work was supported, in part, by the National Natural Science Foundation of China (grant no. 30901067), the Natural Science Foundation of Guangdong Province (grant no. 9451064201003715), the State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences (SKLVEB2009KFKT014 and SKLVEB2010KFKT010), the Special Fund for Agro-scientific Research in the Public Interest (grant no. 200803017), the Program for Changjiang Scholars and Innovative Research Team in University (grant no. IRT0723), and the Yunnan Provincial Program for Introducing High-level Scientists (grant no. 2009CI125). The experiments comply with the current laws of the country in which the experiments were performed.
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