Taurochenodeoxycholic Acid Suppresses NF-κB Activation and Related Cytokines Expression in Peritoneal Macrophages from Adjuvant Arthritis Rat Wei Mao, Mingqiang Liu, Hong Guan, Bo Liu, Caiyun Wang, Xiuling He, Jinshan Cao and Peifeng Li Key Laboratory of Clinical Diagnosis and Treatment Techniques for Animal Disease, Ministry of Agriculture, College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot, China Abstract: Taurochenodeoxycholic acid (TCDCA) is one of main bioactive substances of animals’ bile acid and confers good anti-inflammatory activity. This study aimed to investigate the mechanism of the anti-adjuvant arthritis activity of TCDCA, the actions were observed in vitro on the protein and mRNA expression of cytokines, the activity of nuclear factor-kappa B (NF-κB) and its inhibitory IκBα protein level of peritoneal macrophages (PMs) in adjuvant arthritis (AA) rats. In a definite concentration ranging from 150 μg/mL to 200 μg/mL, the over protein and mRNA expression of TNF-α, IL-1β and IL-6 were remarkably suppressed in the supernatant of PMs treatment with TCDCA. Positive correlations were found between changes of NF-κB activity and expression of TNF-α, IL-1β and IL-6 influenced by TCDCA. The activity of NF-κB was markedly inhibited and IκBα protein level was increased by TCDCA (150 μg/mL,180 μg/mL and 200 μg/mL). TCDCA suppresses the protein and mRNA expression of TNF-α, IL-1β, and IL-6 by inhibiting the NF-κB binding activity, which is mediated through up-regulating the IκBα expression of PMs in AA rats. Keywords: Taurochenodeoxycholic acid; adjuvant arthritis; peritoneal macrophages; nuclear factor-kappa B; cytokines . © 2018 ACG Publications. All rights reserved. |