1
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Lu Z, Wang H, Ishfaq M, Han Y, Zhang X, Li X, Wang B, Lu X, Gao B. Quercetin and AMPK: A Dynamic Duo in Alleviating MG-Induced Inflammation via the AMPK/SIRT1/NF-κB Pathway. Molecules 2023; 28:7388. [PMID: 37959807 PMCID: PMC10650132 DOI: 10.3390/molecules28217388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Revised: 10/07/2023] [Accepted: 10/13/2023] [Indexed: 11/15/2023] Open
Abstract
Mycoplasma gallisepticum (MG) is recognized as a principal causative agent of avian chronic respiratory disease, inflicting substantial economic losses upon the poultry industry. However, the extensive use of conventional antibiotics has resulted in the emergence of drug resistance and various challenges in their clinical application. Consequently, there is an urgent need to identify effective therapeutic agents for the prevention and treatment of mycoplasma-induced respiratory disease in avian species. AMP-activated protein kinase (AMPK) holds significant importance as a regulator of cellular energy metabolism and possesses the capacity to exert an anti-inflammatory effect by virtue of its downstream protein, SIRT1. This pathway has shown promise in counteracting the inflammatory responses triggered by pathogenic infections, thus providing a novel target for studying infectious inflammation. Quercetin possesses anti-inflammatory activity and has garnered attention as a potential alternative to antibiotics. However, there exists a gap in knowledge concerning the impact of this activation on MG-induced inflammatory damage. To address this knowledge gap, we employed AlphaFold2 prediction, molecular docking, and kinetic simulation methods to perform a systematic analysis. As expected, we found that both quercetin and the AMPK activator AICAR activate the chicken AMPKγ1 subunit in a similar manner, which was further validated at the cellular level. Our project aims to unravel the underlying mechanisms of quercetin's action as an agonist of AMPK against the inflammatory damage induced by MG infection. Accordingly, we evaluated the effects of quercetin on the prevention and treatment of air sac injury, lung morphology, immunohistochemistry, AMPK/SIRT1/NF-κB pathway activity, and inflammatory factors in MG-infected chickens. The results confirmed that quercetin effectively inhibits the secretion of pro-inflammatory cytokines such as IL-1β, TNF-α, and IL-6, leading to improved respiratory inflammation injury. Furthermore, quercetin was shown to enhance the levels of phosphorylated AMPK and SIRT1 while reducing the levels of phosphorylated P65 and pro-inflammatory factors. In conclusion, our study identifies the AMPK cascade signaling pathway as a novel cellular mediator responsible for quercetin's ability to counter MG-induced inflammatory damage. This finding highlights the potential significance of this pathway as an important target for anti-inflammatory drug research in the context of avian respiratory diseases.
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Affiliation(s)
- Ziyin Lu
- School of Life Science, Liaoning University, Chongshanzhong-Lu No. 66, Shenyang 110036, China; (Z.L.); (H.W.); (Y.H.); (X.Z.); (X.L.); (B.W.)
| | - Haozhen Wang
- School of Life Science, Liaoning University, Chongshanzhong-Lu No. 66, Shenyang 110036, China; (Z.L.); (H.W.); (Y.H.); (X.Z.); (X.L.); (B.W.)
| | - Muhammad Ishfaq
- College of Computer Science, Huanggang Normal University, Huanggang 438000, China;
| | - Yufang Han
- School of Life Science, Liaoning University, Chongshanzhong-Lu No. 66, Shenyang 110036, China; (Z.L.); (H.W.); (Y.H.); (X.Z.); (X.L.); (B.W.)
| | - Xiujin Zhang
- School of Life Science, Liaoning University, Chongshanzhong-Lu No. 66, Shenyang 110036, China; (Z.L.); (H.W.); (Y.H.); (X.Z.); (X.L.); (B.W.)
| | - Xiang Li
- School of Life Science, Liaoning University, Chongshanzhong-Lu No. 66, Shenyang 110036, China; (Z.L.); (H.W.); (Y.H.); (X.Z.); (X.L.); (B.W.)
| | - Baoqi Wang
- School of Life Science, Liaoning University, Chongshanzhong-Lu No. 66, Shenyang 110036, China; (Z.L.); (H.W.); (Y.H.); (X.Z.); (X.L.); (B.W.)
| | - Xiuli Lu
- School of Life Science, Liaoning University, Chongshanzhong-Lu No. 66, Shenyang 110036, China; (Z.L.); (H.W.); (Y.H.); (X.Z.); (X.L.); (B.W.)
| | - Bing Gao
- Department of Cell Biology and Genetics, Shenyang Medical College, Shenyang 110034, China
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2
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Petrescu AD, DeMorrow S. Farnesoid X Receptor as Target for Therapies to Treat Cholestasis-Induced Liver Injury. Cells 2021; 10:cells10081846. [PMID: 34440614 PMCID: PMC8392259 DOI: 10.3390/cells10081846] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/16/2021] [Accepted: 07/17/2021] [Indexed: 02/06/2023] Open
Abstract
Recent studies on liver disease burden worldwide estimated that cirrhosis is the 11th most common cause of death globally, and there is a great need for new therapies to limit the progression of liver injuries in the early stages. Cholestasis is caused by accumulation of hydrophobic bile acids (BA) in the liver due to dysfunctional BA efflux or bile flow into the gall bladder. Therefore, strategies to increase detoxification of hydrophobic BA and downregulate genes involved in BA production are largely investigated. Farnesoid X receptor (FXR) has a central role in BA homeostasis and recent publications revealed that changes in autophagy due to BA-induced reactive oxygen species and increased anti-oxidant response via nuclear factor E2-related factor 2 (NRF2), result in dysregulation of FXR signaling. Several mechanistic studies have identified new dysfunctions of the cholestatic liver at cellular and molecular level, opening new venues for developing more performant therapies.
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Affiliation(s)
- Anca D. Petrescu
- Division of Pharmacology and Toxicology, College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, USA;
- Department of Internal Medicine, Dell Medical School, The University of Texas at Austin, Austin, TX 78712, USA
| | - Sharon DeMorrow
- Division of Pharmacology and Toxicology, College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, USA;
- Department of Internal Medicine, Dell Medical School, The University of Texas at Austin, Austin, TX 78712, USA
- Central Texas Veterans Health Care System, Temple, TX 78712, USA
- Correspondence: ; Tel.: +1-512-495-5779
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3
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AMPK activation by ASP4132 inhibits non-small cell lung cancer cell growth. Cell Death Dis 2021; 12:365. [PMID: 33824293 PMCID: PMC8024326 DOI: 10.1038/s41419-021-03655-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Revised: 03/17/2021] [Accepted: 03/18/2021] [Indexed: 12/25/2022]
Abstract
Activation of adenosine monophosphate-activated protein kinase (AMPK) is able to produce significant anti-non-small cell lung cancer (NSCLC) cell activity. ASP4132 is an orally active and highly effective AMPK activator. The current study tested its activity against NSCLC cells. In primary NSCLC cells and established cell lines (A549 and NCI-H1944) ASP4132 potently inhibited cell growth, proliferation and cell cycle progression as well as cell migration and invasion. Robust apoptosis activation was detected in ASP4132-treated NSCLC cells. Furthermore, ASP4132 treatment in NSCLC cells induced programmed necrosis, causing mitochondrial p53-cyclophilin D (CyPD)-adenine nucleotide translocase 1 (ANT1) association, mitochondrial depolarization and medium lactate dehydrogenase release. In NSCLC cells ASP4132 activated AMPK signaling, induced AMPKα1-ACC phosphorylation and increased AMPK activity. Furthermore, AMPK downstream events, including mTORC1 inhibition, receptor tyrosine kinases (PDGFRα and EGFR) degradation, Akt inhibition and autophagy induction, were detected in ASP4132-treated NSCLC cells. Importantly, AMPK inactivation by AMPKα1 shRNA, knockout (using CRISPR/Cas9 strategy) or dominant negative mutation (T172A) almost reversed ASP4132-induced anti-NSCLC cell activity. Conversely, a constitutively active AMPKα1 (T172D) mimicked and abolished ASP4132-induced actions in NSCLC cells. In vivo, oral administration of a single dose of ASP4132 largely inhibited NSCLC xenograft growth in SCID mice. AMPK activation, mTORC1 inhibition and EGFR-PDGFRα degradation as well as Akt inhibition and autophagy induction were detected in ASP4132-treated NSCLC xenograft tumor tissues. Together, activation of AMPK by ASP4132 potently inhibits NSCLC cell growth in vitro and in vivo.
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4
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Sun H, Li Q, Yin G, Ding X, Xie J. Ku70 and Ku80 participate in LPS-induced pro-inflammatory cytokines production in human macrophages and monocytes. Aging (Albany NY) 2020; 12:20432-20444. [PMID: 33109771 PMCID: PMC7655212 DOI: 10.18632/aging.103845] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 07/20/2020] [Indexed: 04/23/2023]
Abstract
In human macrophages and monocytes, lipopolysaccharide (LPS) induces nuclear factor kappa B (NFκB) activation and pro-inflammatory cytokines production. We tested the possible involvement of Ku70 and Ku80 in the process. In THP-1 macrophages and primary human peripheral blood mononuclear cells (PBMCs), shRNA-induced double knockdown of Ku70 and Ku80 potently inhibited LPS-induced production of pro-inflammatory cytokines (TNF-α, IL-1β and IL-6). Additionally, we developed CRISPR/Cas-9 gene-editing methods to knockout both Ku70 and Ku80 in THP-1 cells and PBMCs. Double knockout (DKO) largely inhibited LPS-induced pro-inflammatory cytokines production. Conversely, in THP-1 cells exogenous overexpression of both Ku70 and Ku80 enhanced the pro-inflammatory cytokines production by LPS. Ku70 and Ku80 co-immunoprecipitated with p65-p52 NFκB complex in the nuclei of LPS-treated THP-1 cells. Significantly, LPS-induced NFκB activation was inhibited by Ku70 plus Ku80 double knockdown or DKO. It was however enhanced with Ku70 and Ku80 overexpression. Together, Ku70 and Ku80 promote LPS-induced NFκB activation and pro-inflammatory response in THP-1 cells and human PBMCs.
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Affiliation(s)
- Hong Sun
- Department of Stomatology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Quan Li
- Center of Stomatology, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Gang Yin
- Department of Orthopaedics, Wujin Hospital Affiliated to Jiangsu University and The Wujin Clinical College of Xuzhou Medical University, Changzhou, China
| | - Xi Ding
- Department of Stomatology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Jing Xie
- Department of Stomatology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
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5
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Zhang F, Pan T, Wu X, Gao X, Li Z, Ren X. Non-cytotoxic doses of shikonin inhibit lipopolysaccharide-induced TNF-α expression via activation of the AMP-activated protein kinase signaling pathway. Exp Ther Med 2020; 20:45. [PMID: 32952636 PMCID: PMC7480124 DOI: 10.3892/etm.2020.9173] [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: 04/30/2019] [Accepted: 06/24/2020] [Indexed: 12/12/2022] Open
Abstract
Shikonin has been reported to exhibit a wide variety of medical functions. However, the strong non-selective cytotoxicity of shikonin can restrict its clinical application. The aim of the present study was to investigate the effects of shikonin at non-cytotoxic doses on the pro-inflammation functions of monocytes and macrophages. The present results suggested that the non-cytotoxic doses of shikonin effectively inhibited lipopolysaccharide (LPS)-induced reactive oxygen species production, NF-κB activation and TNF-α expression in RAW 264.7 mouse macrophages via AMP-activated protein kinase (AMPK) signaling pathway. In addition, the non-cytotoxic doses of shikonin downregulated LPS-induced TNF-α expression via AMPK signaling activation in primary murine bone marrow-derived macrophages, and also in monocytes cultured ex vivo from patients with chronic obstructive pulmonary disease (COPD). The present in vivo results indicated that the low-toxic dose of shikonin suppressed LPS-induced endotoxin shock and TNF-α expression in mice. Collectively, the present results may provide clinical and translational relevance for treating COPD and other TNF-α-related inflammatory disorders.
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Affiliation(s)
- Fang Zhang
- Department of Respiratory Medicine, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Tao Pan
- Shaanxi Key Laboratory of Brain Disorders, Institute of Basic Medical Sciences and Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, Shaanxi 710021, P.R. China
| | - Xiaohui Wu
- Shaanxi Key Laboratory of Brain Disorders, Institute of Basic Medical Sciences and Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, Shaanxi 710021, P.R. China
| | - Xingchun Gao
- Shaanxi Key Laboratory of Brain Disorders, Institute of Basic Medical Sciences and Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, Shaanxi 710021, P.R. China
| | - Zhikui Li
- Department of Respiratory Medicine, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Xinling Ren
- Department of Respiratory Medicine, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China.,Carson International Cancer Center, Shenzhen University, Shenzhen, Guangdong 518055, P.R. China.,Shenzhen University Clinical Medical Academy, Shenzhen, Guangdong 518060, P.R. China
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6
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Rab5a Promotes Cytolethal Distending Toxin B-Induced Cytotoxicity and Inflammation. Infect Immun 2020; 88:IAI.00132-20. [PMID: 32747601 DOI: 10.1128/iai.00132-20] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Accepted: 07/25/2020] [Indexed: 12/27/2022] Open
Abstract
The cytolethal distending toxin B subunit (CdtB) induces significant cytotoxicity and inflammation in many cell types that are involved in the pathogenesis of postinfectious irritable bowel syndrome (PI-IBS). However, the underlying mechanisms remain unclear. This study tested the potential role of Rab small GTPase 5a (Rab5a) in the process. We tested mRNA and protein expression of proinflammatory cytokines (interleukin-1β [IL-1β] and IL-6) in THP-1 macrophages by quantitative PCR (qPCR) and enzyme-linked immunosorbent assays (ELISAs), respectively. In the primary colonic epithelial cells, Cdt treatment induced a CdtB-Rab5a-cellugyrin association. Rab5a silencing, by target small hairpin RNAs (shRNAs), largely inhibited CdtB-induced cytotoxicity and apoptosis in colon epithelial cells. CRISPR/Cas9-mediated Rab5a knockout also attenuated CdtB-induced colon epithelial cell death. Conversely, forced overexpression of Rab5a intensified CdtB-induced cytotoxicity. In THP-1 human macrophages, Rab5a shRNA or knockout significantly inhibited CdtB-induced mRNA expression and production of proinflammatory cytokines (IL-1β and IL-6). Rab5a depletion inhibited activation of nuclear factor-κB (NF-κB) and Jun N-terminal protein kinase (JNK) signaling in CdtB-treated THP-1 macrophages. Rab5a appears essential for CdtB-induced cytotoxicity in colonic epithelial cells and proinflammatory responses in THP-1 macrophages.
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7
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Xie J, Li Q, Zhu XH, Gao Y, Zhao WH. IGF2BP1 promotes LPS-induced NFκB activation and pro-inflammatory cytokines production in human macrophages and monocytes. Biochem Biophys Res Commun 2019; 513:820-826. [DOI: 10.1016/j.bbrc.2019.03.206] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Accepted: 03/29/2019] [Indexed: 12/27/2022]
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8
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Li P, Wu YH, Zhu YT, Li MX, Pei HH. Requirement of Rab21 in LPS-induced TLR4 signaling and pro-inflammatory responses in macrophages and monocytes. Biochem Biophys Res Commun 2018; 508:169-176. [PMID: 30471852 DOI: 10.1016/j.bbrc.2018.11.074] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 11/12/2018] [Indexed: 12/13/2022]
Abstract
Lipopolysaccharide (LPS) induces macrophage/monocyte activation and pro-inflammatory cytokines production by activating Toll-like receptor 4 (TLR-4) signaling. Rab GTPase 21 (Rab21) is a member of the Rab GTPase subfamily. In the present study, we show that LPS induced TLR4 and Rab21 association and endosomal translocation in murine bone marrow-derived macrophages (BMDMs) and primary human peripheral blood mononuclear cells (PBMCs). In BMDMs, shRNA-mediated stable knockdown of Rab21 inhibited LPS-induced expression and production of pro-inflammatory cytokines (IL-1β, IL-6 and TNF-α). Conversely, forced overexpression of Rab21 by an adenovirus construct potentiated LPS-induced IL-1β, IL-6 and TNF-α production in BMDMs. Further studies show that LPS-induced TLR4 endosomal traffic and downstream c-Jun and NFκB (nuclear factor-kappa B) activation were significantly inhibited by Rab21 shRNA, but intensified with Rab21 overexpression in BMDMs. Finally, in the primary human PBMCs, siRNA-induced knockdown of Rab21 significantly inhibited LPS-induced IL-1β, IL-6 and TNF-α production. Taken together, we suggest that Rab21 regulates LPS-induced pro-inflammatory responses by promoting TLR4 endosomal traffic and downstream signaling activation.
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Affiliation(s)
- Ping Li
- Department of Emergency, The Second Affiliated Hospital of Xi'an Jiao Tong University, Xi'an, China
| | - Yong-Hong Wu
- Lab of Clinical Immunology and Pathogen Detection, Xi'an Medical University, Xi'an, China
| | - Yan-Ting Zhu
- Department of Respiration, The First Affiliated Hospital of Xi'an Jiao Tong University, Xi'an, China
| | - Man-Xiang Li
- Department of Respiration, The First Affiliated Hospital of Xi'an Jiao Tong University, Xi'an, China.
| | - Hong-Hong Pei
- Department of Emergency, The Second Affiliated Hospital of Xi'an Jiao Tong University, Xi'an, China.
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9
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Liu H, Xiang H, Zhao S, Sang H, Lv F, Chen R, Shu Z, Chen AF, Chen S, Lu H. Vildagliptin improves high glucose-induced endothelial mitochondrial dysfunction via inhibiting mitochondrial fission. J Cell Mol Med 2018; 23:798-810. [PMID: 30444033 PMCID: PMC6349192 DOI: 10.1111/jcmm.13975] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Accepted: 09/19/2018] [Indexed: 01/07/2023] Open
Abstract
The dipeptidyl peptidase 4 inhibitor vildagliptin (VLD), a widely used anti-diabetic drug, exerts favourable effects on vascular endothelium in diabetes. We determined for the first time the improving effects of VLD on mitochondrial dysfunction in diabetic mice and human umbilical vein endothelial cells (HUVECs) cultured under hyperglycaemic conditions, and further explored the mechanism behind the anti-diabetic activity. Mitochondrial ROS (mtROS) production was detected by fluorescent microscope and flow cytometry. Mitochondrial DNA damage and ATP synthesis were analysed by real time PCR and ATPlite assay, respectively. Mitochondrial network stained with MitoTracker Red to identify mitochondrial fragmentation was visualized under confocal microscopy. The expression levels of dynamin-related proteins (Drp1 and Fis1) were determined by immunoblotting. We found that VLD significantly reduced mtROS production and mitochondrial DNA damage, but enhanced ATP synthesis in endothelium under diabetic conditions. Moreover, VLD reduced the expression of Drp1 and Fis1, blocked Drp1 translocation into mitochondria, and blunted mitochondrial fragmentation induced by hyperglycaemia. As a result, mitochondrial dysfunction was alleviated and mitochondrial morphology was restored by VLD. Additionally, VLD promoted the phosphorylation of AMPK and its target acetyl-CoA carboxylase in the setting of high glucose, and AMPK activation led to a decreased expression and activation of Drp1. In conclusion, VLD improves endothelial mitochondrial dysfunction in diabetes, possibly through inhibiting Drp1-mediated mitochondrial fission in an AMPK-dependent manner.
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Affiliation(s)
- Hengdao Liu
- Center for Experimental Medical Research, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China.,Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Hong Xiang
- Center for Experimental Medical Research, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Shaoli Zhao
- Center for Experimental Medical Research, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China.,Department of Endocrinology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Haiqiang Sang
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Fenghua Lv
- Department of Cardiology, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China
| | - Ruifang Chen
- Center for Experimental Medical Research, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Zhihao Shu
- Center for Experimental Medical Research, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Alex F Chen
- Center for Experimental Medical Research, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China.,Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Shuhua Chen
- Center for Experimental Medical Research, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China.,Department of Biochemistry, School of Life Sciences, Central South University, Changsha, Hunan, China
| | - Hongwei Lu
- Center for Experimental Medical Research, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China.,Department of Cardiology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
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10
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Grenier A, Sujobert P, Olivier S, Guermouche H, Mondésir J, Kosmider O, Viollet B, Tamburini J. Knockdown of Human AMPK Using the CRISPR/Cas9 Genome-Editing System. Methods Mol Biol 2018; 1732:171-194. [PMID: 29480475 DOI: 10.1007/978-1-4939-7598-3_11] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
AMP-activated protein kinase (AMPK) is a critical energy sensor, regulating signaling networks involved in pathology including metabolic diseases and cancer. This increasingly recognized role of AMPK has prompted tremendous research efforts to develop new pharmacological AMPK activators. To precisely study the role of AMPK, and the specificity and activity of AMPK activators in cellular models, genetic AMPK inactivating tools are required. We report here methods for genetic inactivation of AMPK α1/α2 catalytic subunits in human cell lines by the CRISPR/Cas9 technology, a recent breakthrough technique for genome editing.
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Affiliation(s)
- Adrien Grenier
- U1016, Institut Cochin, Inserm, Paris, France
- UMR8104, CNRS, Paris, France
- Université Paris Descartes,, Paris, France
- Equipe Labellisée Ligue Nationale Contre le Cancer (LNCC), Paris, France
| | - Pierre Sujobert
- Hospices Civils de Lyon, Centre Hospitalier Lyon Sud, Service d'Hématologie Biologique, Pierre-Bénite, France
- Université Claude Bernard Lyon-1, Lyon, France
- INSERM U1052, CNRS 5286, Université Claude Bernard, Faculté de Médecine Lyon-Sud Charles Mérieux, Université de Lyon, Lyon, France
| | - Séverine Olivier
- U1016, Institut Cochin, Inserm, Paris, France
- UMR8104, CNRS, Paris, France
- Université Paris Descartes,, Paris, France
| | - Hélène Guermouche
- U1016, Institut Cochin, Inserm, Paris, France
- UMR8104, CNRS, Paris, France
- Université Paris Descartes,, Paris, France
- Equipe Labellisée Ligue Nationale Contre le Cancer (LNCC), Paris, France
| | - Johanna Mondésir
- U1016, Institut Cochin, Inserm, Paris, France
- UMR8104, CNRS, Paris, France
- Université Paris Descartes,, Paris, France
- Equipe Labellisée Ligue Nationale Contre le Cancer (LNCC), Paris, France
| | - Olivier Kosmider
- U1016, Institut Cochin, Inserm, Paris, France
- UMR8104, CNRS, Paris, France
- Université Paris Descartes,, Paris, France
- Equipe Labellisée Ligue Nationale Contre le Cancer (LNCC), Paris, France
| | - Benoit Viollet
- U1016, Department EMD, Institut Cochin, Inserm, Paris, France.
- UMR8104, CNRS, Paris, France.
- Université Paris Descartes, Paris, France.
| | - Jérôme Tamburini
- U1016, Institut Cochin, Inserm, Paris, France.
- UMR8104, CNRS, Paris, France.
- Université Paris Descartes,, Paris, France.
- Equipe Labellisée Ligue Nationale Contre le Cancer (LNCC), Paris, France.
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11
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Liu HX, Xu MQ, Li SP, Tian S, Guo MX, Qi JY, He CJ, Zhao XS. Jujube leaf green tea extracts inhibits hepatocellular carcinoma cells by activating AMPK. Oncotarget 2017; 8:110566-110575. [PMID: 29299169 PMCID: PMC5746404 DOI: 10.18632/oncotarget.22821] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 11/13/2017] [Indexed: 12/12/2022] Open
Abstract
Here we evaluated the anti-hepatocellular carcinoma activity by the Jujube leaf green tea extracts (JLGTE). We showed that JLGTE exerted anti-proliferative, cytotoxic and pro-apoptotic activities against HepG2 and primary human hepatocellular carcinoma cells. It was however non-cytotoxic to the normal hepatocytes. JLGTE activated AMP-activated protein kinase (AMPK) signaling, which was required for its cytotoxicity against hepatocellular carcinoma cells. Silence of AMPKα1, via targeted short hairpin RNAs or CRISPR-Cas9 genome editing, inhibited JLGTE-induced AMPK activation and HepG2 cell apoptosis. Further, in-activation of AMPK by a dominant negative AMPKα1 (T172A) also alleviated JLGTE's cytotoxicity against HepG2 cells. On the other hand, forced-activation of AMPK by introduction of a constitutively-active AMPKα1 (T172D) mimicked JLGTE's actions and led to HepG2 cell apoptosis. These results suggest that JLGTE inhibits human hepatocellular carcinoma cells possibly via activating AMPK.
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Affiliation(s)
- H X Liu
- Jujube Scientific Research and Applied Center, Life Science College, Luoyang Normal University, Luoyang, China
| | - M Q Xu
- Jujube Scientific Research and Applied Center, Life Science College, Luoyang Normal University, Luoyang, China
| | - S P Li
- Jujube Scientific Research and Applied Center, Life Science College, Luoyang Normal University, Luoyang, China
| | - S Tian
- Jujube Scientific Research and Applied Center, Life Science College, Luoyang Normal University, Luoyang, China
| | - M X Guo
- Jujube Scientific Research and Applied Center, Life Science College, Luoyang Normal University, Luoyang, China
| | - J Y Qi
- Jujube Scientific Research and Applied Center, Life Science College, Luoyang Normal University, Luoyang, China
| | - C J He
- Jujube Scientific Research and Applied Center, Life Science College, Luoyang Normal University, Luoyang, China
| | - X S Zhao
- Jujube Scientific Research and Applied Center, Life Science College, Luoyang Normal University, Luoyang, China
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12
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Liu H, Peng H, Xiang H, Guo L, Chen R, Zhao S, Chen W, Chen P, Lu H, Chen S. TWEAK/Fn14 promotes oxidative stress through AMPK/PGC‑1α/MnSOD signaling pathway in endothelial cells. Mol Med Rep 2017; 17:1998-2004. [PMID: 29257217 DOI: 10.3892/mmr.2017.8090] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 11/09/2017] [Indexed: 11/06/2022] Open
Abstract
Tumor necrosis factor-like weak inducer of apoptosis (TWEAK) contributes to dysfunction of endothelial cells via its receptor, Fn14. However, its role in the production of reactive oxygen species (ROS), particularly mitochondrial ROS (mtROS) and the subsequent decrease in nitric oxide (NO) in endothelial cells remains unclear. In this study, the effect of TWEAK/Fn14 on generation of ROS, mtROS and NO in endothelial cells and its potential mechanism was investigated. Human umbilical vein endothelial cells (HUVECs) were treated with TWEAK with Fn14 small interfering (si)RNA or negative control RNA. It was demonstrated that TWEAK induced the production of ROS and mtROS in HUVECs, which were detected by fluorescent microscope, and flow cytometry. In addition, TWEAK decreased the generation of NO as indicated using the Nitric Oxide Assay kit. Furthermore, TWEAK aggravated mtDNA damage as measured by quantitative polymerase chain reaction analysis. Inhibition of Fn14 by Fn14 siRNA decreased TWEAK‑induced ROS and mtROS production, as well as mtDNA damage, while it increased the production of NO in endothelial cells. In addition, TWEAK inhibited the expression of active AMP‑activated protein kinase (AMPK) and its downstream protein peroxisome proliferator‑activated receptor‑γ coactivator-1α (PGC‑1α) and manganese superoxide dismutase (MnSOD). Notably, Fn14 siRNA enhanced the expression of the aforementioned proteins. Taken together, TWEAK/Fn14 contributes to endothelial dysfunction through modulation of ROS and mtROS. In addition, the underlying mechanism is implicated in the AMPK/PGC‑1α/MnSOD signaling pathway.
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Affiliation(s)
- Hengdao Liu
- Center for Experimental Medical Research, The Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Hui Peng
- Center for Experimental Medical Research, The Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Hong Xiang
- Center for Experimental Medical Research, The Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Lingli Guo
- Department of Critical Care Medicine, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan 453100, P.R. China
| | - Ruifang Chen
- Center for Experimental Medical Research, The Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Shaoli Zhao
- Center for Experimental Medical Research, The Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Wei Chen
- Center for Experimental Medical Research, The Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Pan Chen
- Center for Experimental Medical Research, The Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Hongwei Lu
- Center for Experimental Medical Research, The Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, P.R. China
| | - Shuhua Chen
- Department of Biochemistry, School of Life Sciences, Central South University, Changsha, Hunan 410013, P.R. China
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13
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Wang J, Li Z, Gao L, Qi Y, Zhu H, Qin X. The regulation effect of AMPK in immune related diseases. SCIENCE CHINA-LIFE SCIENCES 2017; 61:523-533. [DOI: 10.1007/s11427-017-9169-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 08/28/2017] [Indexed: 12/12/2022]
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14
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Xu J, Wu L, Zhang Y, Gu H, Huang Z, Zhou K, Yin X. Activation of AMPK by OSU53 protects spinal cord neurons from oxidative stress. Oncotarget 2017; 8:112477-112486. [PMID: 29348841 PMCID: PMC5762526 DOI: 10.18632/oncotarget.22055] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 08/28/2017] [Indexed: 12/19/2022] Open
Abstract
The present study tested the potential effect of OSU53, a novel AMPK activator, against hydrogen peroxide (H2O2)-induced spinal cord neuron damages. Treatment with OSU53 attenuated H2O2-induced death and apoptosis of primary murine spinal cord neurons. OSU53 activated AMPK signaling, which is required for its actions in spinal cord neurons. The AMPK inhibitor Compound C or AMPKα1 siRNA almost abolished OSU53-mediated neuroprotection against H2O2. On the other hand, sustained-activation of AMPK by introducing the constitutive-active AMPKα1 mimicked OSU53's actions, and protected spinal cord neurons from oxidative stress. OSU53 significantly attenuated H2O2-induced reactive oxygen species production, lipid peroxidation and DNA damages in spinal cord neurons. Additionally, OSU53 increased NADPH content and heme oxygenase-1 mRNA expression in H2O2-treated spinal cord neurons. Together, we indicate that targeted-activation of AMPK by OSU53 protects spinal cord neurons from oxidative stress.
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Affiliation(s)
- Jun Xu
- Department of Orthopedics, Minhang Hospital, Fudan University, Shanghai, China
| | - Liang Wu
- Department of Orthopedics, Minhang Hospital, Fudan University, Shanghai, China
| | - Yiming Zhang
- Department of Orthopedics, Minhang Hospital, Fudan University, Shanghai, China
| | - Huijie Gu
- Department of Orthopedics, Minhang Hospital, Fudan University, Shanghai, China
| | - Zhongyue Huang
- Department of Orthopedics, Minhang Hospital, Fudan University, Shanghai, China
| | - Kaifeng Zhou
- Department of Orthopedics, Minhang Hospital, Fudan University, Shanghai, China
| | - Xiaofan Yin
- Department of Orthopedics, Minhang Hospital, Fudan University, Shanghai, China
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15
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Li P, Li X, Wu Y, Li M, Wang X. A novel AMPK activator hernandezine inhibits LPS-induced TNFα production. Oncotarget 2017; 8:67218-67226. [PMID: 28978028 PMCID: PMC5620168 DOI: 10.18632/oncotarget.18365] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Accepted: 05/03/2017] [Indexed: 12/27/2022] Open
Abstract
Here, we found that hernandezine, a novel AMPK activator, inhibited LPS-induced TNFα expression/production in human macrophage cells (THP-1 and U937 lines). Activation of AMPK is required for hernandezine-induced anti-LPS response. AMPKα shRNA or dominant negative mutation (T172A) blocked hernandezine-induced AMPK activation, which almost completely reversed anti-LPS activity by hernandezine. Exogenous expression of the constitutively activate AMPKα (T172D, caAMPKα) also suppressed TNFα production by LPS. Remarkably, hernandezine was unable to further inhibit LPS-mediated TNFα production in caAMPKα-expressing cells. Hernandezine inhibited LPS-induced reactive oxygen species (ROS) production and nuclear factor kappa B (NFκB) activation. Treatment of hernandezine in ex-vivo cultured primary human peripheral blood mononuclear cells (PBMCs) also largely attenuated LPS-induced TNFα production. Together, we conclude that AMPK activation by hernandezine inhibits LPS-induced TNFα production in macrophages/monocytes.
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Affiliation(s)
- Ping Li
- Department of Emergency, The Second Affiliated Hospital of Xi'an Jiao Tong University, Xi'an, China
| | - Xiaofang Li
- Department of Gastroenterology, The Third People's Hospital of Xi'an, Xi'an, China
| | - Yonghong Wu
- Staff Room of Clinical Immunology and Pathogen Detection, Medical Technology Department, Xi'an Medical College, Xi'an, China
| | - Manxiang Li
- Department of Respiratory Medicine, The First Affiliated Hospital of Xi'an Jiao Tong University, Xi'an, China
| | - Xiaochuang Wang
- Department of Critical Care Medicine, The Second Affiliated Hospital of Xi'an Jiao Tong University, Xi'an, China
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