PMID- 31498515 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20230201 IS - 1095-8355 (Electronic) IS - 1065-6995 (Linking) VI - 44 IP - 1 DP - 2020 Jan TI - Long non-coding RNA MALAT1 sponges miR-149 to promote inflammatory responses of LPS-induced acute lung injury by targeting MyD88. PG - 317-326 LID - 10.1002/cbin.11235 [doi] AB - Acute lung injury (ALI) caused by sepsis occurs early and the condition is severe, and is also an important reason for accelerating the death of patients. Increasing evidence has identified long non-coding RNA (lncRNA) metastasis associated in lung adenocarcinoma transcript 1 (MALAT1) as a regulator of ALI. However, the potential mechanism underlying MALAT1 on ALI still needs further identification. To explore the mechanisms of gene regulation expression mediated by MALAT1 through miR-149/MyD88 in lung injury inflammation, we constructed a lung injury inflammatory model using the lipopolysaccharides (LPS)-induced method and quantificated the cytokines and signaling cascade molecules as well as miR-149. The MALAT1, myeloid differentiation factor 88 (MyD88), tumor necrosis factor-alpha (TNF-alpha), interleukin-1beta (IL-1beta), and IL-6 levels were significantly increased, and the nuclear factor-kappaB (NF-kappaB) pathway was activated, but the miR-149 level was decreased in the LPS-induced ALI model. miR-149 directly targeted both lncRNA MALAT1 and the MyD88 gene. Knockdown of MALAT1 down-regulated the levels of MyD88, TNF-alpha, IL-1beta, and IL-6, and inhibited the NF-kappaB pathway. However, MALAT1 knockdown up-regulated the expression of miR-149. Overexpression of miR-149 down-regulated MyD88, TNF-alpha, IL-1beta, and IL-6 levels, and inhibited the NF-kappaB pathway. MALAT1 acts as a pro-inflammatory factor in ALI via the miR-149/MyD88/NF-kappaB axis and is therefore a potential novel therapeutic target for ALI treatment. CI - (c) 2019 International Federation for Cell Biology. FAU - Liang, Wei-Jun AU - Liang WJ AD - Department of Respiratory Medicine, Changsha Central Hospital, Changsha, P.R. China. FAU - Zeng, Xiao-Yuan AU - Zeng XY AD - Department of Respiratory Medicine, Changsha Central Hospital, Changsha, P.R. China. FAU - Jiang, Sha-Li AU - Jiang SL AD - Department of Pathology, Changsha Central Hospital, Changsha, P.R. China. FAU - Tan, Hong-Yi AU - Tan HY AD - Department of Respiratory Medicine, Changsha Central Hospital, Changsha, P.R. China. FAU - Yan, Mu-Yun AU - Yan MY AD - Department of Respiratory Medicine, Changsha Central Hospital, Changsha, P.R. China. FAU - Yang, Hong-Zhong AU - Yang HZ AUID- ORCID: 0000-0002-5040-851X AD - Department of Respiratory Medicine, Changsha Central Hospital, Changsha, P.R. China. LA - eng GR - B2017205/Medicine and Health Planned Project of Hunan Province/ PT - Journal Article DEP - 20190909 PL - England TA - Cell Biol Int JT - Cell biology international JID - 9307129 SB - IM OTO - NOTNLM OT - MALAT1 OT - MyD88 OT - acute lung injury OT - inflammatory OT - miR-149 EDAT- 2019/09/10 06:00 MHDA- 2019/09/10 06:01 CRDT- 2019/09/10 06:00 PHST- 2019/05/30 00:00 [received] PHST- 2019/08/31 00:00 [accepted] PHST- 2019/09/10 06:00 [pubmed] PHST- 2019/09/10 06:01 [medline] PHST- 2019/09/10 06:00 [entrez] AID - 10.1002/cbin.11235 [doi] PST - ppublish SO - Cell Biol Int. 2020 Jan;44(1):317-326. doi: 10.1002/cbin.11235. Epub 2019 Sep 9.