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Forward Genetics Screens Using Macrophages to Identify Toxoplasma gondii Genes Important for Resistance to IFN-γ-Dependent Cell Autonomous Immunity
Published on: March 12, 2015
[Biological features of mouse macrophage transfected with Toxoplasma gondii GRA-1 gene]
Bi-wen Peng1, Jian-yin Lin, Tao Zhang
1Research Center of Molecular Medicine, Fujian Medical University, Fuzhou 350004, China.
Objective:
To investigate the change of biological features of macrophages after transfected by Toxoplasma gondii GRA-1 genes (P24).
Methods:
The transfected cells Cyto-P24-RAW264.7, Nuc-P24-RAW264.7, Mito-P24-RAW264.7 and ER-P24-RAW264.7 were studied by RT-PCR to determine the P24-mRNA expression. Growth features of the cells were examined with microscopy and the cell growth curve was developed.
Results:
In four cell lines, expression of ER-P24-RAW 264.7 was found to be higher than the other three, and there was no P24-mRNA expression in either of the cells without P24 insert. The attachment and the proliferation of ER-P24-RAW264.7 were more rapid than normal RAW264.7.
Conclusion:
Transfection of mouse macrophages ER-RAW264. 7 strain with T. gondii P24 gene leads to a prominent change of biological features in the studied cell line.
Insights
Transfecting macrophages with Toxoplasma gondii GRA-1 (P24) genes altered their biological features. The ER-P24-RAW264.7 cell line showed enhanced attachment and proliferation, indicating significant changes in macrophage behavior.
Area of Science:
- Immunology
- Cell Biology
- Parasitology
Context:
- Macrophages are crucial immune cells involved in host defense.
- Toxoplasma gondii is an intracellular parasite that manipulates host cell functions.
- Understanding parasite-host interactions is key to developing therapeutic strategies.
Purpose:
- To investigate the impact of Toxoplasma gondii GRA-1 (P24) gene transfection on macrophage biological features.
- To evaluate changes in gene expression and cellular behavior in transfected macrophage cell lines.
Summary:
- Mouse macrophages (RAW264.7) were transfected with T. gondii P24 gene constructs targeting different cellular compartments (cytoplasmic, nuclear, mitochondrial, endoplasmic reticulum).
- RT-PCR confirmed P24-mRNA expression in transfected cells, with the ER-P24-RAW264.7 line exhibiting the highest expression.
- Microscopy and growth curve analysis revealed that ER-P24-RAW264.7 cells demonstrated accelerated attachment and proliferation compared to untransfected controls.
Impact:
- Transfection with T. gondii P24 gene significantly alters macrophage biological characteristics.
- The ER-P24-RAW264.7 cell line serves as a model for studying parasite-induced changes in host cell behavior.
- Findings contribute to understanding T. gondii pathogenesis and host immune evasion mechanisms.
