Ginger extract modulates the expression of IL-12 and TGF-β in the central nervous system and serum of mice with experimental autoimmune encephalomyelitis

Document Type: Original Research Article

Authors

1 Department of Immunology, Medical School, Kerman University of Medical Sciences, Kerman, Iran

2 Department of Immunology, Medical School, Rafsanjan University of Medical Sciences, Rafsanjan, Iran

3 Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran

4 Department of Histology, Medical School, Rafsanjan University of Medical Sciences, Rafsanjan, Iran

5 Department of Physiology, Medical School, Rafsanjan University of Medical Sciences, Rafsanjan, Iran

6 Department of Immunology, Medical School, Tarbiat Moddares University, Tehran, Iran

Abstract


Objective: The main function of IL-12 is differentiation of naive T cells intoTh1 cells and TGF-β is a powerful immunoregulatory cytokine. The immunomodulatory and anti-inflammatory properties of ginger have also been reported in some studies. The aim of this study was to evaluate the effects of ginger extract on the expression of IL-12 and TGF-β in a model of experimental autoimmune encephalomyelitis (EAE).

Materials and Methods: EAE was induced in C57BL/6 mice by immunization with myelin oligodendroglial glycoprotein emulsified in complete Freund's adjuvant. The mice were administered intra-peritoneally with ginger extracts or PBS, from day +3 to +30. On day 31, mice were scarified and the expression of IL-12 and TGF-β mRNA in the spinal cord were determined by using real time-PCR. The serum levels of cytokines were measured by ELISA.

Results: In PBS-treated EAE mice, the expression of IL-12 P35 and IL-12 P40 mRNA in the CNS and the mean serum levels of IL-12 were significantly higher than those of healthy group (p<0.001). In ginger-treated EAE mice, the expression of IL-12 mRNA and its serum levels were significantly lower as compared to PBS-treated EAE mice. No significant difference was observed between PBS-treated EAE mice and healthy group regarding the expression of TGF-β mRNA. In ginger (300 mg/kg)-treated EAE group, the expression of TGF-β mRNA and its serum levels were significantly higher in comparison to PBS-treated EAE mice (p
Conclusion: These results indicated that ginger extract modulates the expression of IL-12 and TGF-β in CNS and serum of EAE mice.

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Main Subjects


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