PMID- 37958556 OWN - NLM STAT- MEDLINE DCOM- 20231129 LR - 20231129 IS - 1422-0067 (Electronic) IS - 1422-0067 (Linking) VI - 24 IP - 21 DP - 2023 Oct 25 TI - Alismol Purified from the Tuber of Alisma orientale Relieves Acute Lung Injury in Mice via Nrf2 Activation. LID - 10.3390/ijms242115573 [doi] LID - 15573 AB - Since the ethanol extract of Alisma orientale Juzepzuk (EEAO) suppresses lung inflammation by suppressing Nuclear Factor-kappa B (NF-kappaB) and activating Nuclear Factor Erythroid 2-related Factor 2 (Nrf2), we set out to identify chemicals constituting EEAO that suppress lung inflammation. Here, we provide evidence that among the five most abundant chemical constituents identified by Ultra Performance Liquid Chromatography (UPLC) and Nuclear Magnetic Resonance (NMR), alismol is one of the candidate constituents that suppresses lung inflammation in a lipopolysaccharide (LPS)-induced acute lung injury (ALI) mouse model and protects mice from ALI-like symptoms. Alismol did not induce cytotoxicity or reactive oxygen species (ROS). When administered to the lung of LPS-induced ALI mice (n = 5/group), alismol decreased the level of neutrophils and of the pro-inflammatory molecules, including Tumor Necrosis Factor-alpha (TNF-alpha), Interleukin-1 beta (IL-1beta), Interleukin-6 (IL-6), Monocyte Chemoattractant Protein-1 (MCP-1), Interferon-gamma (IFN-gamma), and Cyclooxygenase-2 (COX-2), suggesting an anti-inflammatory activity of alismol. Consistent with these findings, alismol ameliorated the key features of the inflamed lung of ALI, such as high cellularity due to infiltrated inflammatory cells, the development of hyaline membrane structure, and capillary destruction. Unlike EEAO, alismol did not suppress NF-kappaB activity but rather activated Nrf2. Consequently, alismol induced the expression of prototypic genes regulated by Nrf2, including Heme Oxygenase-1 (HO-1), NAD(P)H: quinine oxidoreductase-1 (NQO-1), and glutamyl cysteine ligase catalytic units (GCLC). Alismol activating Nrf2 appears to be associated with a decrease in the ubiquitination of Nrf2, a key suppressive mechanism for Nrf2 activity. Together, our results suggest that alismol is a chemical constituent of EEAO that contributes at least in part to suppressing some of the key features of ALI by activating Nrf2. FAU - Kim, Kyun Ha AU - Kim KH AD - School of Korean Medicine, Pusan National University, Yangsan 50612, Republic of Korea. FAU - Kim, Soyeon AU - Kim S AUID- ORCID: 0000-0001-9879-1477 AD - Department of Internal Medicine, Korean Medicine Hospital, Pusan National University, Yangsan 50612, Republic of Korea. FAU - Kwun, Min Jung AU - Kwun MJ AD - School of Korean Medicine, Pusan National University, Yangsan 50612, Republic of Korea. FAU - Lee, Ji Yeon AU - Lee JY AD - School of Korean Medicine, Pusan National University, Yangsan 50612, Republic of Korea. FAU - Oh, Sei-Ryang AU - Oh SR AUID- ORCID: 0000-0002-9769-4779 AD - Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 363-883, Republic of Korea. FAU - Choi, Jun-Yong AU - Choi JY AD - Department of Internal Medicine, Korean Medicine Hospital, Pusan National University, Yangsan 50612, Republic of Korea. FAU - Joo, Myungsoo AU - Joo M AUID- ORCID: 0000-0002-5417-1732 AD - School of Korean Medicine, Pusan National University, Yangsan 50612, Republic of Korea. LA - eng GR - 2018R1A2A307565013 and 2020R1A2C1004267/NSF of Korea/ PT - Journal Article DEP - 20231025 PL - Switzerland TA - Int J Mol Sci JT - International journal of molecular sciences JID - 101092791 RN - 87827-55-2 (alismol) RN - EC 1.14.14.18 (Heme Oxygenase-1) RN - 0 (Interleukin-6) RN - 0 (Lipopolysaccharides) RN - 0 (NF-E2-Related Factor 2) RN - 0 (NF-kappa B) SB - IM MH - Animals MH - Mice MH - *Acute Lung Injury/metabolism MH - *Alisma MH - Heme Oxygenase-1/genetics/metabolism MH - Interleukin-6/metabolism MH - Lipopolysaccharides/toxicity MH - NF-E2-Related Factor 2/genetics/metabolism MH - NF-kappa B/metabolism MH - *Pneumonia/metabolism PMC - PMC10647250 OTO - NOTNLM OT - Alisma orientale Juzepzuk OT - NF-kappaB OT - Nrf2 OT - acute lung injury OT - alismol OT - mouse model OT - neutrophilic lung inflammation COIS- The authors declare no conflict of interest. EDAT- 2023/11/14 06:43 MHDA- 2023/11/15 06:42 PMCR- 2023/10/25 CRDT- 2023/11/14 02:08 PHST- 2023/09/04 00:00 [received] PHST- 2023/10/19 00:00 [revised] PHST- 2023/10/20 00:00 [accepted] PHST- 2023/11/15 06:42 [medline] PHST- 2023/11/14 06:43 [pubmed] PHST- 2023/11/14 02:08 [entrez] PHST- 2023/10/25 00:00 [pmc-release] AID - ijms242115573 [pii] AID - ijms-24-15573 [pii] AID - 10.3390/ijms242115573 [doi] PST - epublish SO - Int J Mol Sci. 2023 Oct 25;24(21):15573. doi: 10.3390/ijms242115573.