1. Supplementation of dietary heptadecanoic acid enhances anti-Listeria monocytogenes response in macrophages
- Author
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Qian Lei, Yaoyu Zhang, Tongtong Yang, Lei Chen, Xinxin Pei, Yujie Zhang, Tengfei Ma, Yuzhu Xie, Yi Wang, Hongxia Li, Cheng Cao, Buchang Zhang, and Changzhi Xu
- Subjects
Heptadecanoic acid ,Sheep tail fat ,Listeria monocytogenes ,Macrophages ,Nutrition. Foods and food supply ,TX341-641 - Abstract
Listeria monocytogenes infection often leads to listeriosis in immunocompromised individuals, and screening for potential nutrients that improve immunity may be beneficial. Here, we found that pre-incubation with heptadecanoic acid (C17:0), an odd-chain saturated fatty acid, significantly inhibited L.monocytogenes replication in differentiated THP-1 and RAW264.7, as evidenced by comparison of listeriolysin expression and colony count. Mechanistically, the administration of C17:0 triggered the activation of the IFN and NF-κB signaling pathways. Furthermore, C17:0 upregulated ACOD1 expression and the generation of itaconate, an anti-bacterial metabolite in macrophages. Based on these results, our comparative analysis showed that sheep tail fat (STF), ruminant lipid rich in C17:0, had similar anti-L.monocytogenes effect. Collectively, our data highlighted the function of C17:0 in boosting the immune response, shedding light on the application of C17:0 and STF as potential candidates for strengthening anti-L.monocytogenes response.
- Published
- 2024
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