1
|
Pangilinan C, Xu X, Herlyn M, Liang C. Autophagy Paradox: Strategizing Treatment Modality in Melanoma. Curr Treat Options Oncol 2023; 24:130-145. [PMID: 36670319 PMCID: PMC9883356 DOI: 10.1007/s11864-023-01053-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/21/2022] [Indexed: 01/22/2023]
Abstract
OPINION STATEMENT The primordial autophagy process, originally identified as a starvation response in baker's yeast, has since been shown to have a wide spectrum of functions other than survival. In many cases, it is accepted that autophagy operates as a key tumor suppressor mechanism that protects cells from adverse environmental cues by enforcing homeostasis and maintaining the functional and structural integrity of organelles. Paradoxically, heightened states of autophagy are also seen in some cancers, leading to the prevailing view that the pro-survival aspect of autophagy might be hijacked by some tumors to promote their fitness and pathogenesis. Notably, recent studies have revealed a broad range of cell-autonomous autophagy in reshaping tumor microenvironment and maintaining lineage integrity and immune homeostasis, calling for a renewed understanding of autophagy beyond its classical roles in cell survival. Here, we evaluate the increasing body of literature that argues the "double-edged" consequences of autophagy manipulation in cancer therapy, with a particular focus on highly plastic and mutagenic melanoma. We also discuss the caveats that must be considered when evaluating whether autophagy blockade is the effector mechanism of some anti-cancer therapy particularly associated with lysosomotropic agents. If autophagy proteins are to be properly exploited as targets for anticancer drugs, their diverse and complex roles should also be considered.
Collapse
Affiliation(s)
- Christian Pangilinan
- Molecular and Cellular Oncogenesis Program, The Wistar Institute, 3601 Spruce Street, Philadelphia, PA, 19104, USA
| | - Xiaowei Xu
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Meenhard Herlyn
- Molecular and Cellular Oncogenesis Program, The Wistar Institute, 3601 Spruce Street, Philadelphia, PA, 19104, USA
| | - Chengyu Liang
- Molecular and Cellular Oncogenesis Program, The Wistar Institute, 3601 Spruce Street, Philadelphia, PA, 19104, USA.
| |
Collapse
|
2
|
Buccinnà B, Ramondetti C, Piccinini M. Ampk Activation Attenuates Her3 Upregulation And Neuregulin-Mediated Rescue of Cell Proliferation in Her2-Overexpressing Breast Cancer Cell Lines Exposed to Lapatinib. Biochem Pharmacol 2022; 204:115228. [PMID: 36007575 DOI: 10.1016/j.bcp.2022.115228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 08/16/2022] [Accepted: 08/17/2022] [Indexed: 11/02/2022]
Abstract
Lapatinib is a highly selective reversible inhibitor of the tyrosine kinase domains of HER2 and EGFR, approved for the treatment of advanced stage HER2-overexpressing breast cancers. Although targeted therapy with lapatinib provides initial clinical advantage, cancer cells' adaptive responses can overcome the inhibitory effects of lapatinib. HER3 upregulation and autocrine induction of HER3 ligand neuregulin-1 (NRG), have been implicated in the restoration of AKT and ERK1/2 activity and rescue of cell proliferation. In this study we evaluated the effects of lapatinib alone and in combination with AMPK activator GSK-621 in HER2-overexpressing breast cancer cell lines SKBR3 and BT474. Our results show that in cells exposed to lapatinib and GSK-621 in combination, lapatinib-mediated HER3 upregulation was reduced and reactivation of AKT and ERK1/2 kinases was prevented. The two drugs in combination decreased cell viability in a synergistic manner and greatly reduced the ability of NRG to rescue cell proliferation. Finally, we provide evidence that in cells exposed to lapatinib and GSK-621 in combination the establishment of a transcriptionally permissive chromatin structure at the HER3 promoter is hampered. The results of this study highlight a potential role for AMPK activation in counteracting lapatinib-induced adaptive responses of HER2-overexpressing breast cancer cells.
Collapse
Affiliation(s)
- Barbara Buccinnà
- University of Turin, Department of Oncology, via Michelangelo Buonarroti 27/b, 10126 Torino, Italy.
| | - Cristina Ramondetti
- University of Turin, Department of Oncology, via Michelangelo Buonarroti 27/b, 10126 Torino, Italy.
| | - Marco Piccinini
- University of Turin, Department of Oncology, via Michelangelo Buonarroti 27/b, 10126 Torino, Italy.
| |
Collapse
|
3
|
Fan N, Sun Y, Yan L, Chen W, Wang Y, Wang S, Song Y. Itraconazole-Induced the Activation of Adenosine 5'-Monophosphate (Amp)-Activated Protein Kinase Inhibits Tumor Growth of Melanoma via Inhibiting ERK Signaling. Cell Biochem Biophys 2022; 80:331-340. [PMID: 35094205 DOI: 10.1007/s12013-021-01048-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 11/10/2021] [Indexed: 11/25/2022]
Abstract
Itraconazole, an effective broad-spectrum antifungal drug, has been well established for its anticancer activity in cancers including melanoma. However, details concerning its underlying mechanism in melanoma are unclear. This work investigated the function of itraconazole-induced 5'-monophosphate (AMP)-activated protein kinase alpha (AMPKα) in melanoma progression through ERK signaling. The AMPKα level in melanoma tissues and cells was assessed by RT-qPCR and western blot. Survival analysis of patients with melanoma based on the AMPKα expression level was performed according to TCGA database. Melanoma cell proliferation, migration, and invasion were examined using CCK-8, colony formation, wound healing, and Transwell assays. A xenograft tumor model was established to examine the effect of itraconazole on tumor growth in vivo. The AMPKα mRNA and protein levels were reduced in melanoma tissues and cells. A low expression of AMPKα indicated a poor prognosis. Functionally, itraconazole restrained melanoma cell proliferation, migration, and invasion by upregulating AMPKα. Itraconazole activated AMPK signaling and inhibited ERK signaling in melanoma cells. Activation of ERK signaling reversed the effect of itraconazole on cellular process in melanoma. Moreover, itraconazole-induced AMPKα inhibited melanoma tumor growth in vivo by inhibiting ERK signaling. Itraconazole-induced AMPKα inhibits the progression of melanoma by inhibition of ERK signaling.
Collapse
Affiliation(s)
- Ni Fan
- Department of Dermatology, The Affiliated Zhangjiagang Hospital of Soochow University, Suzhou, 215600, Jiangsu, China
| | - Yueping Sun
- Department of Gynaecology and Obstetrics, The Affiliated Zhangjiagang Hospital of Soochow University, Suzhou, 215600, Jiangsu, China
| | - Lv Yan
- Center of Translational Medicine, The Affiliated Zhangjiagang Hospital of Soochow University, Suzhou, 215600, Jiangsu, China
| | - Weining Chen
- Department of Dermatology, The Affiliated Zhangjiagang Hospital of Soochow University, Suzhou, 215600, Jiangsu, China
| | - Yueping Wang
- Department of Dermatology, The Affiliated Zhangjiagang Hospital of Soochow University, Suzhou, 215600, Jiangsu, China
| | - Shusheng Wang
- Department of General Surgery, The Affiliated Zhangjiagang Hospital of Soochow University, Suzhou, 215600, Jiangsu, China.
| | - Yu Song
- Department of Oncology, The Affiliated Zhangjiagang Hospital of Soochow University, Suzhou, 215600, Jiangsu, China.
| |
Collapse
|
4
|
Peng YC, Wang SR, Lai YF, Tsai NM, Lin KL, Lin SJ, Yang TP. Isoamylamine Induces B16-F1 Melanoma Cell Autophagy by Upregulating the 5' Adenosine Monophosphate-Activated Protein Pathway. J Med Food 2021; 24:188-196. [PMID: 33617363 DOI: 10.1089/jmf.2020.4777] [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] [Indexed: 11/13/2022] Open
Abstract
Isoamylamine (IA) is an aliphatic monoamine molecule present in cheese, eggs, and wine. It belongs to the family of polyamines and also can be synthesized endogenously. It has been known that regulation of polyamines in cells is related to cell cycle and tumor formation. Malignant melanoma is difficult to treat and easily resistant to chemotherapy/radiotherapy through autophagy. In this study, we aim to clarify whether IA has a growth control effect on melanoma tumor cells and the regulatory mechanism. We treated B16-F1 melanoma cells with IA at concentrations of 0, 200, 400, and 600 ppm for 24 h. The 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide (MTT) assay was checked for cell viability and results showed that IA has an inhibitory effect on B16-F1 melanoma cells. The signaling molecules, which included Raf/MEK/ERK, were activated, while MSK1 and protein kinase B (AKT) were suppressed. Autophagy was also confirmed to be induced by IA. The acridine orange stain-positive cells were increased and BECN-1/LC3 upregulated. The data also showed that the autophagy regulatory molecule, 5'-adenosine monophosphate-activated protein kinase (AMPK), was induced after IA treatment, so we used dorsomorphin to inhibit AMPK and found that it could suppress autophagy. In conclusion, IA has an effect of inducing autophagy in B16-F1 cells and it is regulated through AMPK.
Collapse
Affiliation(s)
- Yen-Chun Peng
- Department of Internal Medicine, Chiayi Branch of Taichung Veterans General Hospital, Chiayi, Taiwan.,Division of Gastroenterology, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan.,School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Soo-Ray Wang
- Department of Internal Medicine, Chung Shan Medical University Hospital, Taichung, Taiwan
| | - Yi-Fang Lai
- Department of Medical Laboratory and Biotechnology, Chung Shan Medical University, Taichung, Taiwan
| | - Nu-Man Tsai
- Department of Medical Laboratory and Biotechnology, Chung Shan Medical University, Taichung, Taiwan
| | - Keh-Liang Lin
- Department of Medical Laboratory and Biotechnology, Chung Shan Medical University, Taichung, Taiwan
| | - Shyh-Jye Lin
- Department of Medical Laboratory and Biotechnology, Chung Shan Medical University, Taichung, Taiwan
| | - Tzi-Peng Yang
- Department of Medical Laboratory and Biotechnology, Chung Shan Medical University, Taichung, Taiwan
| |
Collapse
|
5
|
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.
Collapse
|
6
|
Avagliano A, Fiume G, Pelagalli A, Sanità G, Ruocco MR, Montagnani S, Arcucci A. Metabolic Plasticity of Melanoma Cells and Their Crosstalk With Tumor Microenvironment. Front Oncol 2020; 10:722. [PMID: 32528879 PMCID: PMC7256186 DOI: 10.3389/fonc.2020.00722] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 04/16/2020] [Indexed: 12/21/2022] Open
Abstract
Cutaneous melanoma (CM) is a highly aggressive and drug resistant solid tumor, showing an impressive metabolic plasticity modulated by oncogenic activation. In particular, melanoma cells can generate adenosine triphosphate (ATP) during cancer progression by both cytosolic and mitochondrial compartments, although CM energetic request mostly relies on glycolysis. The upregulation of glycolysis is associated with constitutive activation of BRAF/MAPK signaling sustained by BRAFV600E kinase mutant. In this scenario, the growth and progression of CM are strongly affected by melanoma metabolic changes and interplay with tumor microenvironment (TME) that sustain tumor development and immune escape. Furthermore, CM metabolic plasticity can induce a metabolic adaptive response to BRAF/MEK inhibitors (BRAFi/MEKi), associated with the shift from glycolysis toward oxidative phosphorylation (OXPHOS). Therefore, in this review article we survey the metabolic alterations and plasticity of CM, its crosstalk with TME that regulates melanoma progression, drug resistance and immunosurveillance. Finally, we describe hallmarks of melanoma therapeutic strategies targeting the shift from glycolysis toward OXPHOS.
Collapse
Affiliation(s)
- Angelica Avagliano
- Department of Public Health, University of Naples Federico II, Naples, Italy
| | - Giuseppe Fiume
- Department of Experimental and Clinical Medicine, University "Magna Graecia" of Catanzaro, Catanzaro, Italy
| | - Alessandra Pelagalli
- Department of Advanced Biomedical Sciences, University of Naples Federico II, Naples, Italy.,Institute of Biostructures and Bioimages, National Research Council, Naples, Italy
| | - Gennaro Sanità
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, Naples, Italy
| | - Maria Rosaria Ruocco
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, Naples, Italy
| | - Stefania Montagnani
- Department of Public Health, University of Naples Federico II, Naples, Italy
| | - Alessandro Arcucci
- Department of Public Health, University of Naples Federico II, Naples, Italy
| |
Collapse
|
7
|
El-Houjeiri L, Possik E, Vijayaraghavan T, Paquette M, Martina JA, Kazan JM, Ma EH, Jones R, Blanchette P, Puertollano R, Pause A. The Transcription Factors TFEB and TFE3 Link the FLCN-AMPK Signaling Axis to Innate Immune Response and Pathogen Resistance. Cell Rep 2020; 26:3613-3628.e6. [PMID: 30917316 DOI: 10.1016/j.celrep.2019.02.102] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Revised: 10/22/2018] [Accepted: 02/25/2019] [Indexed: 12/11/2022] Open
Abstract
TFEB and TFE3 are transcriptional regulators of the innate immune response, but the mechanisms regulating their activation upon pathogen infection are poorly elucidated. Using C. elegans and mammalian models, we report that the master metabolic modulator 5'-AMP-activated protein kinase (AMPK) and its negative regulator Folliculin (FLCN) act upstream of TFEB/TFE3 in the innate immune response, independently of the mTORC1 signaling pathway. In nematodes, loss of FLCN or overexpression of AMPK confers pathogen resistance via activation of TFEB/TFE3-dependent antimicrobial genes, whereas ablation of total AMPK activity abolishes this phenotype. Similarly, in mammalian cells, loss of FLCN or pharmacological activation of AMPK induces TFEB/TFE3-dependent pro-inflammatory cytokine expression. Importantly, a rapid reduction in cellular ATP levels in murine macrophages is observed upon lipopolysaccharide (LPS) treatment accompanied by an acute AMPK activation and TFEB nuclear localization. These results uncover an ancient, highly conserved, and pharmacologically actionable mechanism coupling energy status with innate immunity.
Collapse
Affiliation(s)
- Leeanna El-Houjeiri
- Goodman Cancer Research Center, McGill University, Montréal, QC, Canada; Department of Biochemistry, McGill University, Montréal, QC, Canada
| | - Elite Possik
- Goodman Cancer Research Center, McGill University, Montréal, QC, Canada; Department of Biochemistry, McGill University, Montréal, QC, Canada
| | - Tarika Vijayaraghavan
- Goodman Cancer Research Center, McGill University, Montréal, QC, Canada; Department of Biochemistry, McGill University, Montréal, QC, Canada
| | - Mathieu Paquette
- Goodman Cancer Research Center, McGill University, Montréal, QC, Canada; Department of Biochemistry, McGill University, Montréal, QC, Canada
| | - José A Martina
- Cell Biology and Physiology Center, National Heart, Lung, and Blood Institute, NIH, Bethesda, MD, USA
| | - Jalal M Kazan
- Goodman Cancer Research Center, McGill University, Montréal, QC, Canada; Department of Biochemistry, McGill University, Montréal, QC, Canada
| | - Eric H Ma
- Goodman Cancer Research Center, McGill University, Montréal, QC, Canada; Department of Physiology, McGill University, Montréal, QC, Canada
| | - Russell Jones
- Goodman Cancer Research Center, McGill University, Montréal, QC, Canada; Department of Physiology, McGill University, Montréal, QC, Canada
| | - Paola Blanchette
- Goodman Cancer Research Center, McGill University, Montréal, QC, Canada; Department of Biochemistry, McGill University, Montréal, QC, Canada
| | - Rosa Puertollano
- Cell Biology and Physiology Center, National Heart, Lung, and Blood Institute, NIH, Bethesda, MD, USA
| | - Arnim Pause
- Goodman Cancer Research Center, McGill University, Montréal, QC, Canada; Department of Biochemistry, McGill University, Montréal, QC, Canada.
| |
Collapse
|
8
|
Neuronal AMP-activated protein kinase hyper-activation induces synaptic loss by an autophagy-mediated process. Cell Death Dis 2019; 10:221. [PMID: 30833547 PMCID: PMC6399353 DOI: 10.1038/s41419-019-1464-x] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 01/29/2019] [Accepted: 02/14/2019] [Indexed: 02/01/2023]
Abstract
Alzheimer’s disease (AD) is a neurodegenerative disorder characterized by synaptic loss that leads to the development of cognitive deficits. Synapses are neuronal structures that play a crucial role in memory formation and are known to consume most of the energy used in the brain. Interestingly, AMP-activated protein kinase (AMPK), the main intracellular energy sensor, is hyper-activated in degenerating neurons in several neurodegenerative diseases, including AD. In this context, we asked whether AMPK hyper-activation could influence synapses' integrity and function. AMPK hyper-activation in differentiated primary neurons led to a time-dependent decrease in pre- and post-synaptic markers, which was accompanied by a reduction in synapses number and a loss of neuronal networks functionality. The loss of post-synaptic proteins was mediated by an AMPK-regulated autophagy-dependent pathway. Finally, this process was also observed in vivo, where AMPK hyper-activation primed synaptic loss. Overall, our data demonstrate that during energetic stress condition, AMPK might play a fundamental role in the maintenance of synaptic integrity, at least in part through the regulation of autophagy. Thus, AMPK might represent a potential link between energetic failure and synaptic integrity in neurodegenerative conditions such as AD.
Collapse
|
9
|
Figarola JL, Singhal J, Singhal S, Kusari J, Riggs A. Bioenergetic modulation with the mitochondria uncouplers SR4 and niclosamide prevents proliferation and growth of treatment-naïve and vemurafenib-resistant melanomas. Oncotarget 2018; 9:36945-36965. [PMID: 30651927 PMCID: PMC6319337 DOI: 10.18632/oncotarget.26421] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 11/16/2018] [Indexed: 12/12/2022] Open
Abstract
BRAF mutations are detected in >50% of all melanomas. These mutations impair the LKB1-AMPK signaling, an important metabolic pathway associated with cell growth, proliferation and survival. Melanoma patients with BRAF mutations are usually treated with BRAF inhibitors such as vemurafenib, but responses are short-lived as drug resistant tumors metabolically switch to mitochondrial oxidative phosphorylation (OXPHOS) to escape metabolic stress-induced BRAF inhibition. Additionally, a large subset of melanoma utilizes OXPHOS in their metabolism, which can confer de novo resistance to BRAF inhibitors. Therefore, uncoupling of OXPHOS to perturb energy homeostasis and to indirectly stimulate AMPK could be a novel treatment for melanoma and to overcome intrinsic and acquired resistance to BRAF inhibitors. Here, we investigated the effects of SR4 and niclosamide, two small molecule mitochondria uncouplers, on the growth and proliferation of treatment-naïve and vemurafenib-resistant melanomas in vitro and in vivo. SR4 and niclosamide inhibited melanoma proliferation irrespective of BRAF/NRAS status. Melanomas with greater OXPHOS phenotype (higher OCR/ECAR), with LKB1 mutation, or with acquired resistance to vemurafenib displayed greater sensitivity to both uncouplers. More importantly, SR4 and niclosamide inhibited tumor growth in both treatment-naïve and vemurafenib-resistant xenograft mice models. Mechanistic studies indicate both uncouplers induced energetic stress, modulated the AMPK-mTOR pathway, and promoted apoptosis without affecting MEK-ERK MAPK signaling. These results suggest that uncouplers such as SR4 and niclosamide may be useful as first line treatment against melanoma regardless of BRAF/NRAS status, and as an adjuvant therapy for patients failing MAPK inhibitors.
Collapse
Affiliation(s)
- James L. Figarola
- Division of Diabetes and Metabolic Diseases Research, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA 91010, USA
| | - Jyotsana Singhal
- Division of Diabetes and Metabolic Diseases Research, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA 91010, USA
| | - Sharad Singhal
- Department of Medical Oncology, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA 91010, USA
| | - Jyotirmoy Kusari
- Division of Diabetes and Metabolic Diseases Research, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA 91010, USA
| | - Arthur Riggs
- Division of Diabetes and Metabolic Diseases Research, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA 91010, USA
| |
Collapse
|
10
|
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.
Collapse
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
| |
Collapse
|
11
|
Ladli M, Richard C, Aguilar LC, Ducamp S, Bondu S, Sujobert P, Tamburini J, Lacombe C, Azar N, Foretz M, Zermati Y, Mayeux P, Viollet B, Verdier F. Finely-tuned regulation of AMP-activated protein kinase is crucial for human adult erythropoiesis. Haematologica 2018; 104:907-918. [PMID: 30309849 PMCID: PMC6518903 DOI: 10.3324/haematol.2018.191403] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Accepted: 10/03/2018] [Indexed: 11/09/2022] Open
Abstract
AMP-activated protein kinase (AMPK) is a heterotrimeric complex containing α, β, and γ subunits involved in maintaining integrity and survival of murine red blood cells. Indeed, Ampk α1-/- , Ampk β1-/- and Ampk γ1-/- mice develop hemolytic anemia and the plasma membrane of their red blood cells shows elasticity defects. The membrane composition evolves continuously along erythropoiesis and during red blood cell maturation; defects due to the absence of Ampk could be initiated during erythropoiesis. We, therefore, studied the role of AMPK during human erythropoiesis. Our data show that AMPK activation had two distinct phases in primary erythroblasts. The phosphorylation of AMPK (Thr172) and its target acetyl CoA carboxylase (Ser79) was elevated in immature erythroblasts (glycophorin Alow), then decreased conjointly with erythroid differentiation. In erythroblasts, knockdown of the α1 catalytic subunit by short hairpin RNA led to a decrease in cell proliferation and alterations in the expression of membrane proteins (band 3 and glycophorin A) associated with an increase in phosphorylation of adducin (Ser726). AMPK activation in mature erythroblasts (glycophorin Ahigh), achieved through the use of direct activators (GSK621 and compound 991), induced cell cycle arrest in the S phase, the induction of autophagy and caspase-dependent apoptosis, whereas no such effects were observed in similarly treated immature erythroblasts. Thus, our work suggests that AMPK activation during the final stages of erythropoiesis is deleterious. As the use of direct AMPK activators is being considered as a treatment in several pathologies (diabetes, acute myeloid leukemia), this observation is pivotal. Our data highlighted the importance of the finely-tuned regulation of AMPK during human erythropoiesis.
Collapse
Affiliation(s)
- Meriem Ladli
- Institut Cochin, INSERM U1016.,CNRS UMR 8104, Paris.,Université Paris Descartes, Sorbonne Paris Cité.,Labex GREX
| | - Cyrielle Richard
- Institut Cochin, INSERM U1016.,CNRS UMR 8104, Paris.,Université Paris Descartes, Sorbonne Paris Cité.,Labex GREX
| | - Lilia Cantero Aguilar
- Institut Cochin, INSERM U1016.,CNRS UMR 8104, Paris.,Université Paris Descartes, Sorbonne Paris Cité.,Labex GREX
| | - Sarah Ducamp
- Institut Cochin, INSERM U1016.,CNRS UMR 8104, Paris.,Université Paris Descartes, Sorbonne Paris Cité.,Labex GREX
| | - Sabrina Bondu
- Institut Cochin, INSERM U1016.,CNRS UMR 8104, Paris.,Université Paris Descartes, Sorbonne Paris Cité.,Labex GREX
| | - Pierre Sujobert
- Institut Cochin, INSERM U1016.,CNRS UMR 8104, Paris.,Université Paris Descartes, Sorbonne Paris Cité
| | - Jérôme Tamburini
- Institut Cochin, INSERM U1016.,CNRS UMR 8104, Paris.,Université Paris Descartes, Sorbonne Paris Cité
| | - Catherine Lacombe
- Institut Cochin, INSERM U1016.,CNRS UMR 8104, Paris.,Université Paris Descartes, Sorbonne Paris Cité.,Labex GREX
| | - Nabih Azar
- Service d'Hémobiologie, Hôpital La Pitié Salpétrière, Paris, France
| | - Marc Foretz
- Institut Cochin, INSERM U1016.,CNRS UMR 8104, Paris.,Université Paris Descartes, Sorbonne Paris Cité.,Labex GREX
| | - Yael Zermati
- Institut Cochin, INSERM U1016.,CNRS UMR 8104, Paris.,Université Paris Descartes, Sorbonne Paris Cité.,Labex GREX
| | - Patrick Mayeux
- Institut Cochin, INSERM U1016.,CNRS UMR 8104, Paris.,Université Paris Descartes, Sorbonne Paris Cité.,Labex GREX
| | - Benoit Viollet
- Institut Cochin, INSERM U1016.,CNRS UMR 8104, Paris.,Université Paris Descartes, Sorbonne Paris Cité.,Labex GREX
| | - Frédérique Verdier
- Institut Cochin, INSERM U1016 .,CNRS UMR 8104, Paris.,Université Paris Descartes, Sorbonne Paris Cité.,Labex GREX
| |
Collapse
|
12
|
Wei YP, Wang XH, Liu G, Zhang JF, Yang YX, Zhang J, Song XL, Li ZD, Zhao LD. Matrine exerts inhibitory effects in melanoma through the regulation of miR-19b-3p/PTEN. Int J Oncol 2018; 53:791-800. [PMID: 29845233 DOI: 10.3892/ijo.2018.4414] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Accepted: 04/30/2018] [Indexed: 11/06/2022] Open
Abstract
Matrine, one of the main alkaloid components extracted from the traditional Chinese herb, Sophora flavescens Ait, has various pharmacological effects, and has been reported to exert antitumor activity in melanoma. In the current study, the molecular mechanisms underlying the inhibitory effects of matrine were investigated in melanoma cell line. It was initially confirmed that matrine inhibited proliferation, invasion and induced apoptosis in human A375 and SK-MEL-2 melanoma cell lines in vitro. Subsequently, reverse transcription-quantitative polymerase chain reaction (RT-qPCR) analysis demonstrated that the expression of microRNA (miR)-19b-3p was significantly increased in melanoma cells and was downregulated by treatment with matrine. Furthermore, downregulated miR-19b-3p exerted effects similar to 500 µg/ml matrine on cell proliferation, invasion and apoptosis. Phosphatase and tensin homolog (PTEN) mRNA was identified as a direct target of miR-19b-3p through bioinformatics analysis and a dual-luciferase reporter assay. Additionally, western blotting and RT-qPCR analysis demonstrated that the expression of PTEN protein and mRNA were increased by the treatment with matrine. Furthermore, silencing of PTEN expression reversed the effects of matrine and miR-19b-3p downregulation in A375 and SK-MEL-2 cells. Taken together, the results indicated that matrine may suppress cell proliferation and invasion and induce cell apoptosis partially via miR-19b-3p targeting of PTEN.
Collapse
Affiliation(s)
- Yan Ping Wei
- Department of Dermatology, The People's Hospital of Jiaozuo City, Jiaozuo, Henan 454000, P.R. China
| | - Xiang Hua Wang
- Department of Dermatology, The People's Hospital of Jiaozuo City, Jiaozuo, Henan 454000, P.R. China
| | - Gang Liu
- Department of Dermatology, The People's Hospital of Jiaozuo City, Jiaozuo, Henan 454000, P.R. China
| | - Jin Feng Zhang
- Department of Dermatology, The People's Hospital of Jiaozuo City, Jiaozuo, Henan 454000, P.R. China
| | - Yong Xian Yang
- Department of Dermatology, The People's Hospital of Jiaozuo City, Jiaozuo, Henan 454000, P.R. China
| | - Juan Zhang
- Department of Dermatology, The People's Hospital of Jiaozuo City, Jiaozuo, Henan 454000, P.R. China
| | - Xiao Li Song
- Department of Dermatology, The People's Hospital of Jiaozuo City, Jiaozuo, Henan 454000, P.R. China
| | - Zhong Dong Li
- Department of Hematology, The People's Hospital of Jiaozuo City, Jiaozuo, Henan 454000, P.R. China
| | - Lin Dong Zhao
- Department of Dermatology, The People's Hospital of Jiaozuo City, Jiaozuo, Henan 454000, P.R. China
| |
Collapse
|
13
|
Liu W, Mao L, Ji F, Chen F, Hao Y, Liu G. Targeted activation of AMPK by GSK621 ameliorates H2O2-induced damages in osteoblasts. Oncotarget 2018; 8:10543-10552. [PMID: 28060740 PMCID: PMC5354679 DOI: 10.18632/oncotarget.14454] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Accepted: 12/09/2016] [Indexed: 12/25/2022] Open
Abstract
GSK621 is a novel AMP-activated protein kinase (AMPK) activator. This study tested its potential cytoprotective effect in hydrogen peroxide (H2O2)-treated osteoblasts. In cultured MC3T3-E1 osteoblastic cells and primary murine osteoblasts, GSK621 significantly attenuated H2O2-induced cell death and apoptosis. AMPK activation was required for GSK621-induced osteoblast cytoprotection. Inhibition of AMPK, by AMPKα1 T172A mutation or shRNA silence, almost completely blocked GSK621-induced osteoblast cytoprotection. Reversely, introduction of a constitutively-active AMPKα1 (T172D) alleviated H2O2 injuries in MC3T3-E1 cells. Further, GSK621 increased nicotinamide adenine dinucleotide phosphate (NADPH) content in osteoblasts to inhibit H2O2-induced reactive oxygen species (ROS) production. Meanwhile, GSK621 activated cytoprotective autophagy in the osteoblasts. On the other hand, pharmacological inhibition of autophagy alleviated GSK621-mediated osteoblast cytoprotection against H2O2. These results suggest that targeted activation of AMPK by GSK621 ameliorates H2O2-induced osteoblast cell injuries.
Collapse
Affiliation(s)
- Weidong Liu
- Department of Orthopedics, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| | - Li Mao
- Department of Endocrinology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| | - Feng Ji
- Department of Orthopedics, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| | - Fengli Chen
- Clinical Laboratory, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| | - Yuedong Hao
- Department of Orthopedics, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| | - Gang Liu
- Department of Orthopedics, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, China
| |
Collapse
|
14
|
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.
Collapse
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.
| |
Collapse
|
15
|
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.
Collapse
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
| |
Collapse
|
16
|
Zhao Z, Feng L, Wang J, Cheng D, Liu M, Ling M, Xu W, Sun K. NPC-26 kills human colorectal cancer cells via activating AMPK signaling. Oncotarget 2017; 8:18312-18321. [PMID: 28407688 PMCID: PMC5392330 DOI: 10.18632/oncotarget.15436] [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: 12/01/2016] [Accepted: 01/11/2017] [Indexed: 12/25/2022] Open
Abstract
NPC-26 is novel mitochondrion-interfering compound. The current study tested its potential effect against colorectal cancer (CRC) cells. We demonstrated that NPC-26 induced potent anti-proliferative and cytotoxic activities against CRC cell lines (HCT-116, DLD-1 and HT-29). Activation of AMP-activated protein kinase (AMPK) signaling mediated NPC-26-induced CRC cell death. AMPKα1 shRNA knockdown or dominant negative mutation abolished NPC-26-induced AMPK activation and subsequent CRC cell death. NPC-26 disrupted mitochondrial function, causing mitochondrial permeability transition pore (mPTP) opening and reactive oxygen species (ROS) production. ROS scavengers (NAC or MnTBAP) and mPTP blockers (cyclosporin A or sanglifehrin A) blocked NPC-26-induced AMPK activation and attenuated CRC cell death. Significantly, intraperitoneal injection of NPC-26 potently inhibited HCT-116 tumor growth in severe combined immuno-deficient (SCID) mice. Yet, its anti-tumor activity was significantly weakened against AMPKα1-silenced HCT-116 tumors. Together, we conclude that NPC-26 kills CRC cells possibly via activating AMPK signaling.
Collapse
Affiliation(s)
- Zhen Zhao
- Clinical Laboratory, Minhang Hospital, Fudan University, Shanghai, China
| | - Li Feng
- Department of Gastroenterology, Minhang Hospital, Fudan University, Shanghai, China
| | - Jiqin Wang
- Emergency Department, Minhang Hospital, Fudan University, Shanghai, China
| | - Deshan Cheng
- Emergency Department, Minhang Hospital, Fudan University, Shanghai, China
| | - Mei Liu
- Emergency Department, Minhang Hospital, Fudan University, Shanghai, China
| | - Meirong Ling
- Emergency Department, Minhang Hospital, Fudan University, Shanghai, China
| | - Weiping Xu
- Shanghai University of Medicine & Health Sciences, Shanghai, China
| | - Keyu Sun
- Emergency Department, Minhang Hospital, Fudan University, Shanghai, China
| |
Collapse
|
17
|
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.
Collapse
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
| |
Collapse
|