Effects of taurocholic acid on immunoregulation in mice.

Currently, there is a dramatically growing interest in Chinese traditional medicines, especially in the therapy of inflammatory diseases. Taurocholic acid (TCA), as a kind of natural bioactive substance of animal bile acid, has medicinal applications to treat a wide range of inflammatory diseases. The study was designed to evaluate the effects of TCA on cytokine secretion, such as TNF-α and IL-1β and on the ratio of CD4(+)/CD8(+), which is beneficial for understanding the mechanism of TCA on immunoregulation preliminarily, and also will benefit our further research. The gene and protein expressions of TNF-α and IL-1β were measured by real time RT-PCR and ELISA in serum, spleen and lymphocytes respectively. The ratio of CD4(+)/CD8(+) in peripheral blood and lymphocytes was measured by flow cytometry. Our present study has shown that lipopolysaccharide (LPS) and cyclosporin A (CsA) could increase or decrease the gene and protein expressions of TNF-α and IL-1β respectively. TCA (0.25g/kg, 0.125g/kg) could recover the suppressed expressions of TNF-α and IL-1β and increase the ratio of CD4(+)/CD8(+). In vitro, TCA (15μg/mL) could inhibit the increased production of TNF-α and IL-1β; TCA (0.15μg/mL-15μg/mL) could inhibit the increased gene expressions of IL-1β and TNF-α. TCA (0.15μg/mL) could recover the suppressed expressions of TNF-α and IL-1β. The function of immunoregulation of TCA may be accomplished through modulating the gene and protein expressions of TNF-α and IL-1β and elevating CD4(+)/CD8(+) T-cell ratio. Copyright © 2012 Elsevier B.V. All rights reserved.

Citation

Caiyun Wang, Lei Li, Hong Guan, Saiyinna Tong, Mingqiang Liu, Chang Liu, Ziying Zhang, Chenguang Du, Peifeng Li. Effects of taurocholic acid on immunoregulation in mice. International immunopharmacology. 2013 Feb;15(2):217-22

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PMID: 23261361

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