PMID- 35266443 OWN - NLM STAT- MEDLINE DCOM- 20220411 LR - 20220716 IS - 2165-5987 (Electronic) IS - 2165-5979 (Print) IS - 2165-5979 (Linking) VI - 13 IP - 3 DP - 2022 Mar TI - Suppression of NOD-like receptor protein 3 inflammasome activation and macrophage M1 polarization by hederagenin contributes to attenuation of sepsis-induced acute lung injury in rats. PG - 7262-7276 LID - 10.1080/21655979.2022.2047406 [doi] AB - Acute lung injury (ALI) is a major leading cause of death in sepsis patients. Hederagenin (HG), derived from Hedera helix Linne, has anti-inflammatory effects, while its role in sepsis-induced ALI has not been elucidated. In vivo, rats were subjected to cecal ligation and puncture to induce ALI and then treated with HG (12.5, 25, or 50 mg/kg) by gavage. Administration of HG raised survival rate, ameliorated lung injury, and decreased lung wet/dry ratio and inflammatory cell accumulation in bronchoalveloar lavage fluid (BALF) of ALI rats. HG inhibited macrophage polarization toward the M1 phenotype as evidenced by decreased CD86 expression in rat lung tissues. Moreover, HG decreased the secretion of TNF-alpha, IL-6 and monocyte chemoattractant protein-1 (MCP-1) in BALF and the levels of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) in lung tissues. In vitro, phorbol-12-myristate-13-acetate (PMA)-differentiated THP-1 macrophages were stimulated with 100 ng/mL lipopolysaccharide. HG treatment inhibited M1 macrophage polarization and the production of M1-related pro-inflammatory mediators (IL-6, MCP-1, iNOS, and COX-2). Mechanistically, HG inhibited NLRP3 inflammasome activation and subsequent release of IL-18 and IL-1beta, and suppressed NF-kappaB signaling pathway both in vivo and in vitro. Notably, HG treatment further emphasized the inhibitory effect of NF-kappaB inhibitor BAY11-7082 on NLRP3 inflammasome activation and macrophage M1 polarization. Taken together, HG exerts a protective effect against sepsis-induced ALI by reducing the inflammatory response and macrophage M1 polarization, which may involve NF-kappaB pathway-modulated NLRP3 inflammasome activation. FAU - Wang, Lin AU - Wang L AD - Department of Emergency Medicine, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China. FAU - Zhao, Min AU - Zhao M AD - Department of Emergency Medicine, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China. LA - eng PT - Journal Article PL - United States TA - Bioengineered JT - Bioengineered JID - 101581063 RN - 0 (Inflammasomes) RN - 0 (Interleukin-6) RN - 0 (Lipopolysaccharides) RN - 0 (NF-kappa B) RN - 0 (NLR Family, Pyrin Domain-Containing 3 Protein) RN - 0 (NLR Proteins) RN - 6SMK8R7TGJ (Oleanolic Acid) RN - EC 1.14.99.1 (Cyclooxygenase 2) RN - RQF57J8212 (hederagenin) SB - IM MH - *Acute Lung Injury/chemically induced MH - Animals MH - Cyclooxygenase 2 MH - Humans MH - Inflammasomes/adverse effects MH - Interleukin-6 MH - Lipopolysaccharides/pharmacology MH - Lung/metabolism MH - Macrophages MH - NF-kappa B/metabolism MH - NLR Family, Pyrin Domain-Containing 3 Protein/genetics/metabolism MH - NLR Proteins MH - Oleanolic Acid/analogs & derivatives MH - Rats MH - *Sepsis/complications PMC - PMC9208453 OTO - NOTNLM OT - Hederagenin OT - NF-kappaB OT - NLRP3 OT - macrophage OT - sepsis-induced acute lung injury COIS- No potential conflict of interest was reported by the author(s). EDAT- 2022/03/11 06:00 MHDA- 2022/04/12 06:00 PMCR- 2022/03/10 CRDT- 2022/03/10 08:39 PHST- 2022/03/10 08:39 [entrez] PHST- 2022/03/11 06:00 [pubmed] PHST- 2022/04/12 06:00 [medline] PHST- 2022/03/10 00:00 [pmc-release] AID - 2047406 [pii] AID - 10.1080/21655979.2022.2047406 [doi] PST - ppublish SO - Bioengineered. 2022 Mar;13(3):7262-7276. doi: 10.1080/21655979.2022.2047406.