Abstract
In this study, we aimed at assessing the therapeutical potential of 6-gingerol ([5S]-5-hydroxy-1-[4-hydroxy- 3-methoxyphenyl]-3-decanone) against ovalbumin-sensitized asthma in rats. The rats were treated intraperitoneally with 6-gingerol (75 mg/kg body weight) for 30 days and a theophylline (200 mg/kg body weight)-treated group as a control. Changes in the levels of T-cell-linked cytokines (interleukin-4 [IL-4], IL-5, IL-13, and interferon-gamma [IFN-?]), total immunoglobulin E (IgE), gene expressions of bitter taste-sensing type 2-receptor 10 (T2R10), inositol 1,4,5-triphosphate receptor 1 (IP3R1), Orai1 and protein expressions of nuclear factor of activated T cells 1 (NFAT1), c-Myc and histopathological changes were observed in rats. 6-Gingerol exerts its beneficial impacts like theophylline in lessening IL-4, IL-5, and IL-13, and IgE and increasing the level of IFN-?. Significant down-regulation of T2R10 gene expression and up-regulation of IP3R1 and Orai1 gene expression were observed in experimental rats and these alterations were normalized after treatment with 6-gingerol or theophylline. The histopathological study revealed that the accumulation of glycoprotein and thickness of alveolar epithelium in asthmatic rats and supplementation with 6-gingerol or theophylline in asthmatic rats restored these changes to normal. In conclusion, 6-gingerol has a protective effect on lungs in ovalbumin-sensitized asthma in rats.
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