Bacterial Metabolite Reuterin Attenuated LPS-Induced Oxidative Stress and Inflammation Response in HD11 Macrophages
Yibin Xu,
Xiaoqing Ding,
Yuanyuan Wang,
Danlei Li,
Lingyu Xie,
Shuang Liang,
Yunfeng Zhang,
Weifen Li,
Aikun Fu,
Xiuan Zhan
Affiliations
Yibin Xu
Key Laboratory of Animal Nutrition and Feed in East China, Ministry of Agriculture, Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, College of Animal Science, Zhejiang University (Zijingang Campus), Hangzhou 310058, China
Xiaoqing Ding
Key Laboratory of Animal Nutrition and Feed in East China, Ministry of Agriculture, Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, College of Animal Science, Zhejiang University (Zijingang Campus), Hangzhou 310058, China
Yuanyuan Wang
Key Laboratory of Animal Nutrition and Feed in East China, Ministry of Agriculture, Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, College of Animal Science, Zhejiang University (Zijingang Campus), Hangzhou 310058, China
Danlei Li
Key Laboratory of Animal Nutrition and Feed in East China, Ministry of Agriculture, Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, College of Animal Science, Zhejiang University (Zijingang Campus), Hangzhou 310058, China
Lingyu Xie
Key Laboratory of Animal Nutrition and Feed in East China, Ministry of Agriculture, Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, College of Animal Science, Zhejiang University (Zijingang Campus), Hangzhou 310058, China
Shuang Liang
Key Laboratory of Animal Nutrition and Feed in East China, Ministry of Agriculture, Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, College of Animal Science, Zhejiang University (Zijingang Campus), Hangzhou 310058, China
Yunfeng Zhang
Key Laboratory of Animal Nutrition and Feed in East China, Ministry of Agriculture, Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, College of Animal Science, Zhejiang University (Zijingang Campus), Hangzhou 310058, China
Weifen Li
Key Laboratory of Animal Nutrition and Feed in East China, Ministry of Agriculture, Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, College of Animal Science, Zhejiang University (Zijingang Campus), Hangzhou 310058, China
Aikun Fu
Key Laboratory of Animal Nutrition and Feed in East China, Ministry of Agriculture, Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, College of Animal Science, Zhejiang University (Zijingang Campus), Hangzhou 310058, China
Xiuan Zhan
Key Laboratory of Animal Nutrition and Feed in East China, Ministry of Agriculture, Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, College of Animal Science, Zhejiang University (Zijingang Campus), Hangzhou 310058, China
Reuterin is well-known for its broad-spectrum antimicrobial ability, while the other potential bioactivity is not yet clear. The present study aims to investigate the immunomodulatory activity of reuterin on chicken macrophage HD11 cells for the first time and evaluate whether reuterin is able to regulate the lipopolysaccharide-stimulated inflammatory response. The results showed that the safe medication range of reuterin was less than 250 μM. Reuterin treatment for 6 h decreased the transcriptional of CD86, IL-1β and iNOS and increased the expression of CD206 in a dose-dependent way, but reuterin treatment for 12 h contrary increased the expression of IL-1β, IL-6 and IL-10. However, it was noticed that reuterin treatment for 12 h significantly decreased the production of reactive oxygen species (ROS) and suppressed the phagocytosis activity of HD11 macrophages against bacteria. Further, the results showed that preincubation or coincubation with reuterin significantly attenuated the promotive effects of lipopolysaccharide (LPS) on transcription of proinflammatory cytokines (including IL-1β, IL-6 and TNF-α) and obviously inhibited nitric oxide (NO) production as well as the protein expression of inducible nitric oxide synthase (iNOS). Meanwhile, Mechanism studies implied that reuterin might exert an anti-inflammatory effect on LPS-stimulated cells by downregulating the expression of TLR4/MyD88/TRAF6 and blocking the activation of NF-κB as well as MAPKs signaling pathways. Additionally, it was found that both pretreatment and cotreatment with reuterin remarkably inhibited the oxidative stress induced by LPS stimulation by activating the Nrf2/HO-1 signaling pathway and enhancing the activities of antioxidative enzymes. These findings suggested the immunoregulatory function of reuterin and indicated this bacterial metabolite was able to inhibit the inflammation and oxidative stress of HD11 macrophages once exposed to LPS stimulation.
