PMID- 33638265 OWN - NLM STAT- MEDLINE DCOM- 20211119 LR - 20211119 IS - 1747-0285 (Electronic) IS - 1747-0277 (Linking) VI - 97 IP - 6 DP - 2021 Jun TI - Toll-like receptor 4 antagonist FP7 alleviates lipopolysaccharide-induced septic shock via NF-kB signaling pathway. PG - 1151-1157 LID - 10.1111/cbdd.13837 [doi] AB - Septic shock is the most severe complication of sepsis occurs when body has an overwhelming response to infection, making it the most prevalent cause of deaths in surgical intensive-care units. Therefore, it is urgent to understand its pathogenesis and develop new therapeutic candidate drugs for septic shock. Here, we explored the effect of FP7, an antagonist of Toll-like receptor 4 (TLR4), in the septic shock. First, we injected mice with FP7 and found that FP7 had no effect on immune cells. Then, bone marrow-derived macrophages (BMDMs) isolated from mice were pretreated with FP7 followed by lipopolysaccharide (LPS) stimulation, and FP7 specifically suppressed LPS-induced inflammatory responses in BMDMs via Nuclear factor kappa-light-chain enhancer of activated B cells (NF-kappaB) signaling pathway, with no effect on other TLRs-mediated inflammations. Finally, we injected mice with LPS and D-galactosamine to induce septic shock, followed by the treatment of FP7, and FP7 significantly increased survival rate, improved lung necrosis, and inhibited the secretions of proinflammatory cytokines in the mice with septic shock. Therefore, our study suggested that FP7 had a protective role in septic shock and it might serve as a promising therapeutic candidate drug to treat septic shock. CI - (c) 2021 John Wiley & Sons Ltd. FAU - Li, Chao AU - Li C AD - Department of Emergency, Xingtai People's Hospital of Hebei Province, Xingtai, China. FAU - Wang, Junhui AU - Wang J AD - Department of Emergency, Xingtai People's Hospital of Hebei Province, Xingtai, China. FAU - Zhao, Mailiang AU - Zhao M AD - Department of Emergency, Xingtai People's Hospital of Hebei Province, Xingtai, China. FAU - Zhang, Sheng AU - Zhang S AD - Department of Emergency, Xingtai People's Hospital of Hebei Province, Xingtai, China. FAU - Zhang, Yanwei AU - Zhang Y AD - Department of Emergency, Xingtai People's Hospital of Hebei Province, Xingtai, China. LA - eng PT - Journal Article DEP - 20210306 PL - England TA - Chem Biol Drug Des JT - Chemical biology & drug design JID - 101262549 RN - 0 (Cytokines) RN - 0 (Lipopolysaccharides) RN - 0 (NF-kappa B) RN - 0 (Protective Agents) RN - 0 (Toll-Like Receptor 4) SB - IM MH - Animals MH - Cytokines/metabolism MH - Disease Models, Animal MH - Lipopolysaccharides/toxicity MH - Macrophages/cytology/drug effects/metabolism MH - Male MH - Mice MH - Mice, Inbred C57BL MH - NF-kappa B/*metabolism MH - Protective Agents/chemistry/*pharmacology/therapeutic use MH - Shock, Septic/drug therapy/etiology/mortality MH - Signal Transduction/*drug effects MH - Survival Rate MH - Toll-Like Receptor 4/*antagonists & inhibitors/metabolism OTO - NOTNLM OT - FP7 OT - Mice OT - TLR4 OT - inflammation OT - septic shock EDAT- 2021/02/28 06:00 MHDA- 2021/11/20 06:00 CRDT- 2021/02/27 05:44 PHST- 2021/01/23 00:00 [revised] PHST- 2020/11/17 00:00 [received] PHST- 2021/02/21 00:00 [accepted] PHST- 2021/02/28 06:00 [pubmed] PHST- 2021/11/20 06:00 [medline] PHST- 2021/02/27 05:44 [entrez] AID - 10.1111/cbdd.13837 [doi] PST - ppublish SO - Chem Biol Drug Des. 2021 Jun;97(6):1151-1157. doi: 10.1111/cbdd.13837. Epub 2021 Mar 6.