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Kim SW, Jee W, Park SM, Park YR, Bae H, Na YC, Lee HG, Kwon S, Jang HJ. Anti-inflammatory Effect of Symplocos prunifolia Extract in an In Vitro Model of Acute Pneumonia. PLANT FOODS FOR HUMAN NUTRITION (DORDRECHT, NETHERLANDS) 2024:10.1007/s11130-024-01231-5. [PMID: 39254770 DOI: 10.1007/s11130-024-01231-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 08/15/2024] [Indexed: 09/11/2024]
Abstract
Acute pneumonia is a respiratory disease characterized by inflammation within the lung tissue, exhibiting higher morbidity rates and mortality rates among immunocompromised children and older adults. Symplocos species have been traditionally used as herbal remedies for conditions like dysentery, skin ulcers, diarrhea, and dyspepsia. Contemporary research has employed various Symplocos species in the study of diverse diseases. However, the exact efficacy and mechanisms of action of Symplocos Prunifolia remain unknown. Therefore, this study investigated the anti-inflammatory mechanism of S. prunifolia extract (SPE) in A549 and RAW264.7 cells stimulated by lipopolysaccharide (LPS). SPE significantly reduced nitric oxide (NO) production and the protein expression levels of like inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) in LPS-stimulated RAW 264.7 cells. Furthermore, it reduced the protein expression levels of iNOS, COX-2 and the levels of pro-inflammatory cytokines in LPS-stimulated A549 cells. The mechanism underlying the anti-inflammatory effect of SPE was associated with the inhibition of LPS stimulated the phosphoinositide-3-kinase/protein kinase B (PI3K/Akt) and Mitogen-activated protein kinase (MAPK) phosphorylation. Moreover, we confirmed that SPE decreased the nuclear translocation of nuclear factor-κB (NF-κB)/p65 stimulated by LPS. In conclusion, these results demonstrate that SPE alleviates inflammatory responses by deactivating the PI3K/Akt, MAPK, and NF-κB signaling pathways. Our findings suggest that SPE is a potential candidate for acute pneumonia prevention.
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Affiliation(s)
- Seok Woo Kim
- College of Korean Medicine, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul, 02447, Republic of Korea
| | - Wona Jee
- College of Korean Medicine, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul, 02447, Republic of Korea
| | - So-Mi Park
- College of Korean Medicine, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul, 02447, Republic of Korea
| | - Ye-Rin Park
- College of Korean Medicine, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul, 02447, Republic of Korea
| | - Hanbit Bae
- PanaCura Inc., 32, Soyanggang-ro, Chuncheon, 24232, Republic of Korea
| | - Yun-Cheol Na
- Western Seoul Center, Korea Basic Science Institute, 150 Bugahyeon-ro, Seodaemun-Gu, Seoul, 03759, Republic of Korea
| | - Han-Gyul Lee
- Department of Cardiology and Neurology, Kyung Hee University College of Korean Medicine, Kyung Hee University Medical Center, Seoul, 02447, Republic of Korea
| | - Seungwon Kwon
- Department of Cardiology and Neurology, Kyung Hee University College of Korean Medicine, Kyung Hee University Medical Center, Seoul, 02447, Republic of Korea.
| | - Hyeung-Jin Jang
- College of Korean Medicine, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea.
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul, 02447, Republic of Korea.
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Zhou W, Dai Q, Su N, Liu Z, Hu J. IGF2BP2‑dependent STIM1 inhibition protects against LPS‑induced pneumonia in vitro by alleviating endoplasmic reticulum stress and the inflammatory response. Exp Ther Med 2023; 26:575. [PMID: 38023363 PMCID: PMC10652236 DOI: 10.3892/etm.2023.12273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Accepted: 08/03/2023] [Indexed: 12/01/2023] Open
Abstract
Pneumonia is a disease caused by inflammation and has high morbidity and mortality rates. Stromal interaction molecule 1 (STIM1) is involved in the regulation of inflammatory processes. However, to the best of the authors' knowledge, the role of STIM1 in pneumonia has not yet been reported. In the present study, lipopolysaccharide (LPS) was administered to A549 cells to construct a cell damage model. The expression of STIM1 in the model cells was detected by western blotting and reverse transcription-quantitative PCR. Then, STIM1 expression was inhibited and cell survival was detected by Cell Counting Kit-8 and flow cytometry. The expression of inflammatory factors was detected by enzyme-linked immunosorbent assay and endoplasmic reticulum stress (ERS)-related proteins were detected by immunofluorescence and western blotting. Subsequently, the relationship between insulin-like growth factor 2 mRNA binding protein 2 (IGF2BP2) and STIM1 was verified by RNA-binding protein immunoprecipitation assay and actinomycin D treatment. Finally, the regulatory mechanism of IGF2BP2 and STIM1 in LPS-induced A549 cells was further investigated. The results of the present study demonstrated that STIM1 expression was increased in LPS-induced A549 cells and that STIM1 knockdown inhibited LPS-induced A549 cell apoptosis and alleviated LPS-induced A549 cell inflammation and ERS. In addition, IGF2BP2 enhanced the stability of STIM1 mRNA and knockdown of IGF2BP2-regulated STIM1 expression alleviated LPS-induced ERS and inflammatory responses in A549 cells. In conclusion, knockdown of IGF2BP2-regulated STIM1 improved cell damage in the LPS-induced pneumonia cell model by alleviating ERS and the inflammatory response.
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Affiliation(s)
- Wei Zhou
- Department of Pathology, Guangzhou Chest Hospital, Guangzhou, Guangdong 510095, P.R. China
| | - Qigang Dai
- Department of Oncology, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou, Guangdong 510699, P.R. China
| | - Ning Su
- Department of Oncology, Guangzhou Chest Hospital, Guangzhou, Guangdong 510095, P.R. China
| | - Zhihui Liu
- Department of Clinical Laboratory, Guangzhou Chest Hospital, Guangzhou, Guangdong 510095, P.R. China
| | - Jinxing Hu
- Department of Tuberculosis, Guangzhou Chest Hospital, Guangzhou, Guangdong 510095, P.R. China
- State Key Laboratory of Respiratory Disease, Guangzhou Medical University, Guangzhou, Guangdong 511495, P.R. China
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Deregulated Expression of miR-483-3p Serves as a Diagnostic Biomarker in Severe Pneumonia Children with Respiratory Failure and Its Predictive Value for the Clinical Outcome of Patients. Mol Biotechnol 2021; 64:311-319. [PMID: 34637043 DOI: 10.1007/s12033-021-00415-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 10/06/2021] [Indexed: 10/20/2022]
Abstract
Severe pneumonia in children is a group of inflammatory diseases of respiratory tract caused by pathogenic microorganisms. Increasing evidence suggested the crucial effects of microRNA on inflammatory diseases. This study aimed to reveal the expression and role of miR-483-3p in the serum of children with severe pneumonia, and to explore the effect of miR-483-3p on the biological function of lipopolysaccharide (LPS)-induced MRC-5 cells. MRC-5 cells were disposed with LPS to construct an in vitro pneumonia cell model. The relative expression level of miR-483-3p was measured by qRT-PCR. ROC curve was used to evaluate the diagnostic value of miR-483-3p in severe pneumonia. The Kaplan-Meier curve was performed to test the characteristics of survival distribution of different miRNA classifications. Cell viability and apoptosis were performed by CCK-8 assay and flow cytometry. IL-1β, TNF-α, and IL-6 were detected by ELISA. Luciferase reporter gene assay and western blot analysis were performed to detect the interaction between miR-483-3p and IGF-1. The expression of serum miR-483-3p in severe pneumonia patients was higher than in controls. The AUC value of the ROC curve was 0.919, indicating that miR-483-3p had diagnostic value for severe pneumonia. The survival curve showed that patients with high expression of miR-483-3p had higher mortality. Cell viability and apoptosis assay showed that overexpression of miR-483-3p suppressed cell proliferation and promoted apoptosis. And upregulation of miR-483-3p promoted generation of inflammatory cytokines. Luciferase report gene assay and western blot assay both illustrated that IGF-1 might be the target gene of miR-483-3p. Serum miR-483-3p can be used as a biomarker for the diagnosis of severe pneumonia. High expression of miR-483-3p promoted the development of severe pneumonia.
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Huang Q, Chen L, Bai Q, Tong T, Zhou Y, Li Z, Lu C, Chen S, Chen L. The roles of microRNAs played in lung diseases via regulating cell apoptosis. Mol Cell Biochem 2021; 476:4265-4275. [PMID: 34398353 DOI: 10.1007/s11010-021-04242-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 08/10/2021] [Indexed: 01/24/2023]
Abstract
MicroRNAs (miRNAs) are a type of endogenous non-coding short-chain RNA, which plays a crucial role in the regulation of many essential cellular functions, including cellular migration, proliferation, invasion, autophagy, oxidative stress, apoptosis, and differentiation. The lung can be damaged by pathogenic microorganisms, as well as physical or chemical factors. Research has confirmed that miRNAs and lung cell apoptosis can affect the development and progression of several lung diseases. This article reviews the role of miRNAs in the development of lung disease through regulating host cell apoptosis.
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Affiliation(s)
- Qiaoling Huang
- Department of Public Health Laboratory Sciences, College of Public Health, Hengyang Medical School, University of South China, 28 West Changsheng Rd, Hengyang, 421001, Hunan, China.,Hunan Province Key Laboratory of Typical Environmental Pollution and Health Hazards, College of Public Health, University of South China, 28 West Changsheng Rd, Hengyang, 421001, Hunan, China
| | - Li Chen
- Department of Public Health Laboratory Sciences, College of Public Health, Hengyang Medical School, University of South China, 28 West Changsheng Rd, Hengyang, 421001, Hunan, China.,Hunan Province Key Laboratory of Typical Environmental Pollution and Health Hazards, College of Public Health, University of South China, 28 West Changsheng Rd, Hengyang, 421001, Hunan, China
| | - Qinqin Bai
- Department of Public Health Laboratory Sciences, College of Public Health, Hengyang Medical School, University of South China, 28 West Changsheng Rd, Hengyang, 421001, Hunan, China.,Hunan Province Key Laboratory of Typical Environmental Pollution and Health Hazards, College of Public Health, University of South China, 28 West Changsheng Rd, Hengyang, 421001, Hunan, China
| | - Ting Tong
- Department of Public Health Laboratory Sciences, College of Public Health, Hengyang Medical School, University of South China, 28 West Changsheng Rd, Hengyang, 421001, Hunan, China.,Hunan Province Key Laboratory of Typical Environmental Pollution and Health Hazards, College of Public Health, University of South China, 28 West Changsheng Rd, Hengyang, 421001, Hunan, China
| | - You Zhou
- Department of Public Health Laboratory Sciences, College of Public Health, Hengyang Medical School, University of South China, 28 West Changsheng Rd, Hengyang, 421001, Hunan, China.,Hunan Province Key Laboratory of Typical Environmental Pollution and Health Hazards, College of Public Health, University of South China, 28 West Changsheng Rd, Hengyang, 421001, Hunan, China
| | - Zhongyu Li
- Hengyang Medical School, University of South China, 28 West Changsheng Rd, Hengyang, 421001, Hunan, China
| | - Chunxue Lu
- Hengyang Medical School, University of South China, 28 West Changsheng Rd, Hengyang, 421001, Hunan, China
| | - Shenghua Chen
- Hengyang Medical School, University of South China, 28 West Changsheng Rd, Hengyang, 421001, Hunan, China.
| | - Lili Chen
- Department of Public Health Laboratory Sciences, College of Public Health, Hengyang Medical School, University of South China, 28 West Changsheng Rd, Hengyang, 421001, Hunan, China. .,Hunan Province Key Laboratory of Typical Environmental Pollution and Health Hazards, College of Public Health, University of South China, 28 West Changsheng Rd, Hengyang, 421001, Hunan, China.
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Ko HM, Lee SH, Jee W, Jung JH, Kim KI, Jung HJ, Jang HJ. Gancaonin N from Glycyrrhiza uralensis Attenuates the Inflammatory Response by Downregulating the NF-κB/MAPK Pathway on an Acute Pneumonia In Vitro Model. Pharmaceutics 2021; 13:pharmaceutics13071028. [PMID: 34371720 PMCID: PMC8309055 DOI: 10.3390/pharmaceutics13071028] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 06/26/2021] [Accepted: 06/30/2021] [Indexed: 12/20/2022] Open
Abstract
Acute pneumonia is an inflammatory disease caused by several pathogens, with symptoms such as fever and chest pain, to which children are particularly vulnerable. Gancaonin N is a prenylated isoflavone of Glycyrrhiza uralensis that has been used in the treatment of various diseases in oriental medicine. There are little data on the anti-inflammatory efficacy of Gancaonin N, and its effects and mechanisms on acute pneumonia are unknown. Therefore, this study was conducted as a preliminary analysis of the anti-inflammatory effect of Gancaonin N in lipopolysaccharide (LPS)-induced RAW264.7 cells, and to identify its preventive effect on the lung inflammatory response and the molecular mechanisms underlying it. In this study, Gancaonin N inhibited the production of NO and PGE2 in LPS-induced RAW264.7 cells and significantly reduced the expression of iNOS and COX-2 proteins at non-cytotoxic concentrations. In addition, in LPS-induced A549 cells, Gancaonin N significantly reduced the expression of COX-2 and pro-inflammatory cytokines, such as TNF-α, IL-1β, and IL-6. Moreover, Gancaonin N reduced MAPK signaling pathway phosphorylation and NF-κB nuclear translocation. Therefore, Gancaonin N relieved the inflammatory response by inactivating the MAPK and NF-κB signaling pathways; thus, it is a potential natural anti-inflammatory agent that can be used in the treatment of acute pneumonia.
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Affiliation(s)
- Hyun Min Ko
- College of Korean Medicine, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Korea; (H.M.K.); (S.-H.L.); (W.J.); (J.H.J.)
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea
| | - Seung-Hyeon Lee
- College of Korean Medicine, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Korea; (H.M.K.); (S.-H.L.); (W.J.); (J.H.J.)
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea
| | - Wona Jee
- College of Korean Medicine, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Korea; (H.M.K.); (S.-H.L.); (W.J.); (J.H.J.)
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea
| | - Ji Hoon Jung
- College of Korean Medicine, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Korea; (H.M.K.); (S.-H.L.); (W.J.); (J.H.J.)
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea
| | - Kwan-Il Kim
- Division of Allergy, Immune and Respiratory System, Department of Internal Medicine, College of Korean Medicine, Kyung Hee University, 23 Kyungheedaero, Dongdaemun-gu, Seoul 02447, Korea;
- Department of Clinical Korean Medicine, Graduate School, Kyung Hee University, Seoul 02247, Korea
| | - Hee-Jae Jung
- Division of Allergy, Immune and Respiratory System, Department of Internal Medicine, College of Korean Medicine, Kyung Hee University, 23 Kyungheedaero, Dongdaemun-gu, Seoul 02447, Korea;
- Department of Clinical Korean Medicine, Graduate School, Kyung Hee University, Seoul 02247, Korea
- Correspondence: (H.-J.J.); (H.-J.J.)
| | - Hyeung-Jin Jang
- College of Korean Medicine, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Korea; (H.M.K.); (S.-H.L.); (W.J.); (J.H.J.)
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Korea
- Correspondence: (H.-J.J.); (H.-J.J.)
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6
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Barreda-Manso MA, Nieto-Díaz M, Soto A, Muñoz-Galdeano T, Reigada D, Maza RM. In Silico and In Vitro Analyses Validate Human MicroRNAs Targeting the SARS-CoV-2 3'-UTR. Int J Mol Sci 2021; 22:6094. [PMID: 34198800 PMCID: PMC8201247 DOI: 10.3390/ijms22116094] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 05/24/2021] [Accepted: 05/29/2021] [Indexed: 02/06/2023] Open
Abstract
COVID-19 pandemic is caused by betacoronavirus SARS-CoV-2. The genome of this virus is composed of a single strand of RNA with 5' and 3'-UTR flanking a region of protein-coding ORFs closely resembling cells' mRNAs. MicroRNAs are endogenous post-transcriptional regulators that target mRNA to modulate protein expression and mediate cellular functions, including antiviral defense. In the present study, we carried out a bioinformatics screening to search for endogenous human microRNAs targeting the 3'-UTR of SARS-CoV-2. Results from the computational techniques allowed us to identify 10 potential candidates. The capacity of 3 of them, together with hsa-miR-138-5p, to target the SARS-CoV-2 3'-UTR was validated in vitro by gene reporter assays. Available information indicates that two of these microRNAs, namely, hsa-miR-3941 and hsa-miR-138-5p, combine effective targeting of SARS-CoV-2 genome with complementary antiviral or protective effects in the host cells that make them potential candidates for therapeutic treatment of most, if not all, COVID-19 variants known to date. All information obtained while conducting the present analysis is available at Open Science Framework repository.
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Affiliation(s)
| | - Manuel Nieto-Díaz
- Molecular Neuroprotection Group, Research Unit, National Hospital for Paraplegics (SESCAM), 45071 Toledo, Spain; (M.A.B.-M.); (A.S.); (T.M.-G.); (D.R.)
| | | | | | | | - Rodrigo M. Maza
- Molecular Neuroprotection Group, Research Unit, National Hospital for Paraplegics (SESCAM), 45071 Toledo, Spain; (M.A.B.-M.); (A.S.); (T.M.-G.); (D.R.)
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Wang H, Wu C, Kong D. miR-140-5p Overexpression Protects Against Lipopolysaccharide-Induced Necrotizing Pneumonia via Targeting Toll-Like Receptor 4. Cell Mol Bioeng 2021; 14:339-348. [PMID: 34295443 DOI: 10.1007/s12195-021-00673-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Accepted: 04/27/2021] [Indexed: 01/04/2023] Open
Abstract
Objective This study is to identify the effects of miRNA-140-5p on necrotizing pneumonia (NP) and its underlying mechanism. Methods The mRNA levels of miRNA-140-5p and TLR4 and secretion of IL-1β, IL-6, and TNF-α in peripheral blood from children with NP and healthy volunteers were determined using qRT-PCR and specific ELISAs. The interactions between miRNA-140-5p and TLR4 were investigated using a dual-luciferase reporter system. Cell viabilities were determined using a CCK-8 assay. qRT-PCR, western blotting, and specific ELISAs were applied to determine the expressions of genes in the cells. Peripheral blood from children with NP had significantly elevated levels of TLR4 but significantly lower levels of miR-140-5p compared to the control. Results Spearman's rank correlation analysis showed a negative correlation between TLR4 and miR-140-5p. miR-140-5p regulated the expressions of TLR4 in A549 cells. Additionally, LPS induced a significant enhancement in the levels of TLR4 but significant reduction in the levels of miR-140-5p. The overexpression of miR-140-5p suppressed cell apoptosis and induced the release of inflammatory cytokines in the LPS-induced A549 cells. Conclusion The underlying mechanisms of miR-140-5p on the regulation of TLR4 are in part by the regulation of p65. The miR-140-5p inhibits necrotizing pneumonia by regulating TLR-4 via TNF-p65 signaling pathway. Supplementary Information The online version contains supplementary material available at 10.1007/s12195-021-00673-0.
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Affiliation(s)
- Haichao Wang
- School of Biology and Food Engineering, Suzhou University, No. 49 Bianhe Middle Road, Suzhou, 234000 Anhui China
| | - Changhao Wu
- School of Biology and Food Engineering, Suzhou University, No. 49 Bianhe Middle Road, Suzhou, 234000 Anhui China
| | - Dehui Kong
- School of Biology and Food Engineering, Suzhou University, No. 49 Bianhe Middle Road, Suzhou, 234000 Anhui China
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8
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Wang J, Yuan X, Ding N. IGF2BP2 knockdown inhibits LPS-induced pyroptosis in BEAS-2B cells by targeting caspase 4, a crucial molecule of the non-canonical pyroptosis pathway. Exp Ther Med 2021; 21:593. [PMID: 33884031 PMCID: PMC8056110 DOI: 10.3892/etm.2021.10025] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 03/01/2021] [Indexed: 12/29/2022] Open
Abstract
Insulin-like growth factor 2 (IGF2) mRNA-binding protein 2 (IGF2BP2) is a secreted protein that can bind to IGF2 and has been reported to promote inflammation. The data from the ENCORI database have predicted that IGF2BP2 can bind caspase 4, which mediates pyroptosis and promotes airway inflammation and lipopolysaccharide (LPS)-induced lung injury. The present study investigated whether IGF2BP2 can regulate LPS-induced lung cell inflammation by targeting caspase 4. Therefore, the non-tumorigenic lung epithelial cell line Beas-2B was transfected with short hairpin RNA (shRNA)-IGF2BP2 and stimulated with LPS. A number of parameters, including cell viability, production of interleukin (IL)-1β and IL-18, activation of gasdermin D (GSDMD) and the expression levels of IGF2BP2, caspase 4 and cleaved-caspase 1, were subsequently assessed using CCK-8, ELISA kits, western blotting and immunofluorescence staining, respectively. RNA pull-down assay was used to probe the possible interaction between IGF2BP2 and caspase 4 RNA. LPS treatment was found to inhibit cell viability, trigger IL-1β and IL-18 production and increase IGF2BP2 expression in a concentration-dependent manner. Compared with cells transfected with shRNA-negative control, cells that were transfected with shRNA-IGF2BP2 exhibited enhanced cell viability, reduced IL-1β and IL-18 concentrations, decreased GSDMD activation in addition to reduced expression levels of caspase 4 and cleaved-caspase 1 following stimulation with 1 µg/ml LPS. Concomitantly, the effects of IGF2BP2 silencing on caspase 4 expression were higher compared with those noted on caspase 1. In addition, binding of IGF2BP2 to caspase 4 RNA was also observed. To conclude, data from the present study suggest that IGF2BP2 knockdown inhibited LPS-induced Beas-2B cell inflammation by targeting caspase 4, thereby inhibiting the non-canonical pyroptosis pathway.
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Affiliation(s)
- Jing Wang
- Department of Emergency Medicine, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, P.R. China
| | - Xiaoli Yuan
- Department of Emergency Medicine, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, P.R. China
| | - Ning Ding
- Department of Emergency Medicine, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, P.R. China
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9
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Xu L, Song Q, Ouyang Z, Zhang X, Zhang C. let7f‑5p attenuates inflammatory injury in i n vitro pneumonia models by targeting MAPK6. Mol Med Rep 2020; 23:95. [PMID: 33300070 PMCID: PMC7723174 DOI: 10.3892/mmr.2020.11734] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 10/19/2020] [Indexed: 12/15/2022] Open
Abstract
Pneumonia accounts for ~1.3 million mortalities in children per year worldwide. MicroRNAs are implicated in several diseases, including cancer and pneumonia; however, the role of let7f-5p in pneumonia is not completely understood. In the present study, lipopolysaccharide (LPS) was used to establish an in vitro pneumonia model in A549 and WI-38 cells. The reverse transcription-quantitative PCR (RT-qPCR) and western blotting results demonstrated that let7f-5p expression levels were significantly decreased, whereas MAPK6 expression levels were significantly increased in the peripheral venous blood of patients with pneumonia and in LPS-induced A549 and WI-38 cells compared with healthy volunteers and control cells, respectively. Furthermore, the dual-luciferase reporter assay demonstrated that let7f-5p targeted the 3′-untranslated region of MAPK6. The ELISA and RT-qPCR results demonstrated that let7f-5p mimic ameliorated LPS-induced inflammatory injury in A549 and WI-38 cells, as demonstrated by decreased expression levels of proinflammatory cytokines, including TNF-α and IL-6. In addition, the Cell Counting Kit-8 assay results indicated that let7f-5p mimic ameliorated LPS-induced reductions in cell viability, and the western blotting results demonstrated that let7f-5p mimic reversed LPS-induced activation of the STAT3 signaling pathway. Notably, the aforementioned let7f-5p-mediated effects were reversed by MAPK6 overexpression. Collectively, the results of the present study suggested that let7f-5p inhibited inflammation by targeting MAPK6 in the in vitro pneumonia model, thus let7f-5p may serve as a potential novel therapeutic target for pneumonia.
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Affiliation(s)
- Lin Xu
- Department of Biomedical Science, Guizhou University Medical College, Guiyang, Guizhou 550025, P.R. China
| | - Qingying Song
- Department of Anesthesiology, The Second Affiliated Hospital of Guizhou College of Traditional Chinese Medicine, Guiyang, Guizhou 550003, P.R. China
| | - Zhanghong Ouyang
- Development Planning Division, Guizhou Provincial People's Hospital, Guiyang, Guizhou 550002, P.R. China
| | - Xiangyan Zhang
- Department of Biomedical Science, Guizhou University Medical College, Guiyang, Guizhou 550025, P.R. China
| | - Cheng Zhang
- Department of Biomedical Science, Guizhou University Medical College, Guiyang, Guizhou 550025, P.R. China
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10
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Liu G, Wan Q, Li J, Hu X, Gu X, Xu S. Circ_0038467 regulates lipopolysaccharide-induced inflammatory injury in human bronchial epithelial cells through sponging miR-338-3p. Thorac Cancer 2020; 11:1297-1308. [PMID: 32181994 PMCID: PMC7180556 DOI: 10.1111/1759-7714.13397] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 02/25/2020] [Accepted: 02/26/2020] [Indexed: 12/12/2022] Open
Abstract
Background Pneumonia is a common acute lower respiratory infection in children and elders. Circular RNAs (circRNAs) have recently been uncovered to play important roles in pneumonia. However, the function and mechanism of circ_0038467 in pneumonia remain elusive. Methods Cell viability and apoptosis were determined using the Cell Counting Kit‐8 (CCK‐8) assay and flow cytometry, respectively. The levels of interleukin 6 (IL‐6), IL‐8 and IL‐1β were detected by enzyme‐linked immunosorbent assay (ELISA). Western blot analysis was performed to assess the expression of related proteins. Circ_0038467 was characterized by Ribonuclease R (RNase) digestion and subcellular localization assays. The levels of circ_0038467 and miR‐338‐3p were evaluated by quantitative real‐time polymerase chain reaction (qRT‐PCR). The direct interaction between circ_0038467 and miR‐338‐3p was validated by the dual‐luciferase reporter and RNA immunoprecipitation (RIP) assays. Results Our data indicated that lipopolysaccharide (LPS) induced an inflammatory injury in 16HBE cells by repressing cell viability and enhancing cell apoptosis and proinflammatory cytokines production. Circ_0038467 was upregulated and miR‐338‐3p was downregulated in LPS‐treated 16HBE cells. Circ_0038467 knockdown or miR‐338‐3p overexpression attenuated LPS‐induced 16HBE cell inflammatory injury. Moreover, circ_0038467 acted as a sponge of miR‐338‐3p in 16HBE cells. MiR‐338‐3p mediated the alleviated effect of circ_0038467 knockdown on LPS‐induced 16HBE cell inflammatory injury. Additionally, the Janus kinase/ signal transducer and activator of transcription 3 (JAK/STAT3) signaling pathway was involved in the circ_0038467/miR‐338‐3p axis‐mediated regulation in LPS‐induced 16HBE cell inflammatory injury. Conclusions The current work had led to the identification of circ_0038467 knockdown that alleviated LPS‐induced inflammatory injury in 16HBE cells at least partly through sponging miR‐338‐3p and regulating JAK/STAT3 pathway, highlighting novel molecular targets for the treatment of pneumonia.
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Affiliation(s)
- Guangming Liu
- Department of Respiratory Intensive Care Unit, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China.,Department of Internal Medicine, Tacheng Municipality People's Hospital, Xinjiang, China
| | - Qiufeng Wan
- Department of Respiratory Intensive Care Unit, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Jingwen Li
- Department of Respiratory Intensive Care Unit, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Xinying Hu
- Department of Respiratory Intensive Care Unit, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Xingli Gu
- Department of Respiratory Intensive Care Unit, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Sicheng Xu
- Department of Respiratory Intensive Care Unit, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
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Circular RNA TTN Acts As a miR-432 Sponge to Facilitate Proliferation and Differentiation of Myoblasts via the IGF2/PI3K/AKT Signaling Pathway. MOLECULAR THERAPY. NUCLEIC ACIDS 2019; 18:966-980. [PMID: 31770673 PMCID: PMC6881651 DOI: 10.1016/j.omtn.2019.10.019] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 09/25/2019] [Accepted: 10/17/2019] [Indexed: 01/22/2023]
Abstract
Circular RNAs (circRNAs) are ubiquitous endogenous RNA found in various organisms that can regulate gene expression in eukaryotes. However, little is known about potential roles for circRNAs in muscle development. We analyzed circRNA sequencing data of bovine skeletal muscle tissue and found differential expression of circTitin (circTTN) in fetal and adult bovine muscle tissue. We then further studied the role of circTTN in bovine muscle development. Overexpression and inhibition of circTTN together elicited its promoting roles in proliferation and differentiation of bovine primary myoblasts. Mechanistically, circTTN showed interaction with miR-432 by luciferase screening and RNA immunoprecipitation (RIP) assays. Additionally, miR-432 is a regulator of insulin-like growth factor 2 (IGF2), as indicated by luciferase activity, quantitative real-time PCR, and western blotting assays. Increased miR-432 expression inhibited the expression of IGF2, but this effect was remitted by circTTN. Conclusively, our results showed that circTTN promoted proliferation and differentiation of bovine primary myoblasts via competitively combining with miR-432 to activate the IGF2/phosphatidylinositol 3-kinase (PI3K)/AKT signaling pathway.
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Li S, Cui W, Song Q, Zhou Y, Li J. miRNA-302e attenuates inflammation in infantile pneumonia though the RelA/BRD4/NF-κB signaling pathway. Int J Mol Med 2019; 44:47-56. [PMID: 31115487 PMCID: PMC6559299 DOI: 10.3892/ijmm.2019.4194] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 04/12/2019] [Indexed: 12/25/2022] Open
Abstract
In the present study, the main focus was investigating the role of microRNA (miRNA)-302e in infantile pneumonia (IP) and exploring the potential protective mechanisms. Briefly, the expression of miRNA-302e was reduced in a mouse model of IP. In addition, the administration of anti-miRNA-302e increased inflammation and induced the protein expression of RelA, bromodomain-containing protein 4 (BRD4) and nuclear factor (NF)-κB in the in vitro model of IP. In contrast, over-expression of miRNA-302e reduced inflammation and suppressed the protein expression of RelA, BRD4 and NF-κB in an in vitro model of IP. Small interfering (si)-RelA attenuated the effects of miRNA-302e on inflammation in an in vitro model of IP. Consistently, si-BRD4 or si-NF-κB attenuated the effects of miRNA-302e on inflammation in an in vitro model of IP. Taken together, the results of the present study demonstrated that miRNA-302e attenuated inflammation in IP through the RelA/ BRD4/ NF-κB signaling pathway.
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Affiliation(s)
- Shaoxia Li
- Department of Pediatrics, The People's Hospital of Dongying, Dongying, Shandong 257091, P.R. China
| | - Wenwen Cui
- Department of Pediatrics, The People's Hospital of Dongying, Dongying, Shandong 257091, P.R. China
| | - Qing Song
- Department of Pediatrics, The People's Hospital of Dongying, Dongying, Shandong 257091, P.R. China
| | - Yufei Zhou
- Department of Thoracic Surgery, The People's Hospital of Dongying, Dongying, Shandong 257091, P.R. China
| | - Jingtao Li
- Department of Surgery, The Second People's Hospital of Laiyang, Yantai, Shandong 265200, P.R. China
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