Abstract
Ganoderma sinensis fungal immunomodulatory protein (FIP-gsi) was a new member of FIPs family. Based on the cloning of FIP-gsi gene from G. sinensis, this paper reported that FIP-gsi gene was expressed in Escherichia coli expression system. Then, the recombinant proteins were analyzed by the sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS). Finally, the immunomodulatory activity was examined by inducing cytokine genes expression. The results showed that the recombinant FIP-gsi protein could be expressed in E. coli and got the yield of about 25% of the soluble form in the total soluble protein. The FIP-gsi protein was composed of 111 amino acids, and the sequence of homologous rate was 88.6% with FIP-glu (LZ-8). Furthermore, it could enhance the levels of interleukin (IL)-2, IL-3, IL-4, interferon gamma, tumor necrosis factor alpha, and IL-2 receptor (IL-2R) in mouse spleen cells.
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Acknowledgements
This research is financially supported by the National Natural Science Foundation of China under Grant Nos. 30771500, Shanghai Science and Technology Committee under Grant Nos.05DZ05007 and Shanghai Leading Academic Discipline Project (Project Number: B209).
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Li, Q., Wang, X., Chen, Y. et al. Cytokines Expression Induced by Ganoderma sinensis Fungal Immunomodulatory Proteins (FIP-gsi) in Mouse Spleen Cells. Appl Biochem Biotechnol 162, 1403–1413 (2010). https://doi.org/10.1007/s12010-010-8916-1
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DOI: https://doi.org/10.1007/s12010-010-8916-1