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Yang X, Tian S, Min Z, Garbarino E, Ma J, Jia J, Tang H, Li L. AMPK restricts HHV-6A replication by inhibiting glycolysis and mTOR signaling. Virology 2024; 595:110080. [PMID: 38631099 DOI: 10.1016/j.virol.2024.110080] [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: 10/06/2023] [Revised: 03/22/2024] [Accepted: 04/03/2024] [Indexed: 04/19/2024]
Abstract
AMP-activated protein kinase (AMPK) is a cellular energy sensor regulating metabolic homeostasis. In this study, we investigated the role of AMPK in response to human herpesvirus 6A (HHV-6A) infection. We show that HHV-6A infection significantly downregulates the active phosphorylated state of AMPK in infected T cells. Pharmacological activation of AMPK highly attenuated HHV-6A propagation. Mechanistically, we found that the activation of AMPK by AICAR blocked HHV-6-induced glycolysis by inhibiting glucose metabolism and lactate secretion, as well as decreasing expressions of key glucose transporters and glycolytic enzymes. In addition, mTOR signaling has been inactivated in HHV-6A infected T cells by AICAR treatment. We also showed that HHV-6A infection of human umbilical cord blood mononuclear cells (CBMCs) reduced AMPK activity whereas the activation of AMPK by metformin drastically reduced HHV-6A DNA replication and virions production. Taken together, this study demonstrates that AMPK is a promising antiviral therapeutic target against HHV-6A infection.
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Affiliation(s)
- Xiaodi Yang
- Department of Medical Genetics, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, 211166, China
| | - Siyu Tian
- Department of Medical Genetics, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, 211166, China
| | - Zhujiang Min
- Department of Medical Genetics, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, 211166, China
| | - Emanuela Garbarino
- Department of Immunology, National Vaccine Innovation Platform, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, 211166, China
| | - Jingjing Ma
- Department of Immunology, National Vaccine Innovation Platform, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, 211166, China
| | - Junli Jia
- Department of Immunology, National Vaccine Innovation Platform, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, 211166, China
| | - Huamin Tang
- Department of Immunology, National Vaccine Innovation Platform, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, 211166, China; The Laboratory Center for Basic Medical Sciences, Nanjing Medical University, Nanjing, 211166, China.
| | - Lingyun Li
- Department of Medical Genetics, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, 211166, China.
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2
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Zhang P, Fu HJ, Lv LX, Liu CF, Han C, Zhao XF, Wang JX. WSSV exploits AMPK to activate mTORC2 signaling for proliferation by enhancing aerobic glycolysis. Commun Biol 2023; 6:361. [PMID: 37012372 PMCID: PMC10070494 DOI: 10.1038/s42003-023-04735-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 03/20/2023] [Indexed: 04/05/2023] Open
Abstract
AMPK plays significant roles in the modulation of metabolic reprogramming and viral infection. However, the detailed mechanism by which AMPK affects viral infection is unclear. The present study aims to determine how AMPK influences white spot syndrome virus (WSSV) infection in shrimp (Marsupenaeus japonicus). Here, we find that AMPK expression and phosphorylation are significantly upregulated in WSSV-infected shrimp. WSSV replication decreases remarkably after knockdown of Ampkα and the shrimp survival rate of AMPK-inhibitor injection shrimp increases significantly, suggesting that AMPK is beneficial for WSSV proliferation. Mechanistically, WSSV infection increases intracellular Ca2+ level, and activates CaMKK, which result in AMPK phosphorylation and partial nuclear translocation. AMPK directly activates mTORC2-AKT signaling pathway to phosphorylate key enzymes of glycolysis in the cytosol and promotes expression of Hif1α to mediate transcription of key glycolytic enzyme genes, both of which lead to increased glycolysis to provide energy for WSSV proliferation. Our findings reveal a novel mechanism by which WSSV exploits the host CaMKK-AMPK-mTORC2 pathway for its proliferation, and suggest that AMPK might be a target for WSSV control in shrimp aquaculture.
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Affiliation(s)
- Peng Zhang
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Sciences, Shandong University, 266237, Qingdao, Shandong, China
| | - Hai-Jing Fu
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Sciences, Shandong University, 266237, Qingdao, Shandong, China
| | - Li-Xia Lv
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Sciences, Shandong University, 266237, Qingdao, Shandong, China
| | - Chen-Fei Liu
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Sciences, Shandong University, 266237, Qingdao, Shandong, China
| | - Chang Han
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Sciences, Shandong University, 266237, Qingdao, Shandong, China
| | - Xiao-Fan Zhao
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Sciences, Shandong University, 266237, Qingdao, Shandong, China
| | - Jin-Xing Wang
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Sciences, Shandong University, 266237, Qingdao, Shandong, China.
- State Key Laboratory of Microbial Technology, Shandong University, 266237, Qingdao, Shandong, China.
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3
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Downregulation of miR-137 Facilitates CD4+ T Cell Pyroptosis in Systemic Lupus Erythematosus via Stimulating AMPK Pathway. J Immunol Res 2023; 2023:1241774. [PMID: 36815949 PMCID: PMC9936506 DOI: 10.1155/2023/1241774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 12/03/2022] [Accepted: 12/17/2022] [Indexed: 02/11/2023] Open
Abstract
Objective From the pathogenic mechanism point of view, systemic lupus erythematosus (SLE) features prominently in T lymphocyte apoptosis. Yet the regulatory mechanism underlying SLE cell apoptosis remains to be explored. This research intends to clarify the role played by miR-137 in SLE and the underlying mechanisms. Methods Twenty SLE patients (SLE group) and twenty healthy controls (control group) were selected, from whom peripheral blood CD4+ T cells were isolated via magnetic-activated cell sorting. Reverse transcription-polymerase chain reaction (RT-PCR) quantified miR-137 and AMP-activated protein kinase (AMPK) in CD4+ T cells. Further, transfection of miR-137 mimics and inhibitors into CD4+ T cells was carried out to alter miR levels. Levels of pyroptosis, apoptosis, and inflammatory- and pyroptosis-related proteins were determined through PI staining, flow cytometry, and Western blotting, respectively. A luciferase reporter gene assay identified the targeting relation between miR-137 and AMPK. Results SLE patients showed downregulated miR-137 and upregulated AMPK in CD4+ T cells than controls. miR-137 upregulation by miR-137 mimic transfection inhibited Jurkat cell pyroptosis and apoptosis at both mRNA and protein levels and suppressed NOD-like receptor thermal protein domain-associated protein 3 (NLRP3) inflammasome activity and pyroptosis-related protein gasdermin D (GSDMD), while miR-137 inhibitor transfection contributed to completely opposite effects. miR-137 directly targeted AMPK, as indicated by the luciferase reporter gene assay. Furthermore, miR-137 inhibitor intervention induced healthy CD4+ T cell pyroptosis and apoptosis via mediating AMPK, whereas miR-137 mimic transfection into CD4+ T cells of SLE patients leads to opposite results. Conclusion Upregulating miR-137 inhibits CD4+ T cell pyroptosis in SLE patients by modulating the AMPK pathway, suggesting the potential diagnostic and therapeutic role of miR-137 in SLE.
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Novel Anti-Cancer Products Targeting AMPK: Natural Herbal Medicine against Breast Cancer. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020740. [PMID: 36677797 PMCID: PMC9863744 DOI: 10.3390/molecules28020740] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 01/01/2023] [Accepted: 01/04/2023] [Indexed: 01/15/2023]
Abstract
Breast cancer is a common cancer in women worldwide. The existing clinical treatment strategies have been able to limit the progression of breast cancer and cancer metastasis, but abnormal metabolism, immunosuppression, and multidrug resistance involving multiple regulators remain the major challenges for the treatment of breast cancer. Adenosine 5'-monophosphate (AMP)-Activated Protein Kinase (AMPK) can regulate metabolic reprogramming and reverse the "Warburg effect" via multiple metabolic signaling pathways in breast cancer. Previous studies suggest that the activation of AMPK suppresses the growth and metastasis of breast cancer cells, as well as stimulating the responses of immune cells. However, some other reports claim that the development and poor prognosis of breast cancer are related to the overexpression and aberrant activation of AMPK. Thus, the role of AMPK in the progression of breast cancer is still controversial. In this review, we summarize the current understanding of AMPK, particularly the comprehensive bidirectional functions of AMPK in cancer progression; discuss the pharmacological activators of AMPK and some specific molecules, including the natural products (including berberine, curcumin, (-)-epigallocatechin-3-gallate, ginsenosides, and paclitaxel) that influence the efficacy of these activators in cancer therapy; and elaborate the role of AMPK as a potential therapeutic target for the treatment of breast cancer.
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Zhang W, Wang Y, Hu X, Zhou Z, Zhu Y, Liang X, Yang JL. AMPK Promotes Larval Metamorphosis of Mytilus coruscus. Genes (Basel) 2022; 13:genes13122384. [PMID: 36553651 PMCID: PMC9777882 DOI: 10.3390/genes13122384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 11/30/2022] [Accepted: 12/09/2022] [Indexed: 12/23/2022] Open
Abstract
Metamorphosis is a critical process in the transition from planktonic life to benthic life for marine invertebrates, which is accompanied by a large amount of energy consumption. Previous studies have proved that AMP-activated protein kinase (AMPK), as a vital energy regulator, plays a prominent role in mediating the growth and development of terrestrial animals. However, its function in the growth and development of marine invertebrates, especially in metamorphosis, remains elusive. This study explored the function of AMPK in the larval metamorphosis of Mytilus coruscus. The full-length cDNA of AMPK genes in M. coruscus was cloned and characterized, which is composed of three subunits, McAMPKα, McAMPKβ, and McAMPKγ. Pharmacological tests demonstrated that through the application of an AMPK activator, AMP substantially enhanced the larval metamorphosis rate (p < 0.05). By contrast, the larval metamorphosis rate decreased significantly after being treated with the AMPK inhibitor Compound C (p < 0.05). McAMPK gene knock-down resulted in a reduction in McAMPK gene expression (p < 0.05), and the larval metamorphosis of M. coruscus was significantly restrained (p < 0.05). These results indicated that AMPK signaling is vital in the larval metamorphosis of M. coruscus, which advances further understanding in exploring the molecular mechanisms in the metamorphosis of marine invertebrate larvae.
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Affiliation(s)
- Wen Zhang
- Shanghai Collaborative Innovation Center for Cultivating Elite Breeds and Green-Culture of Aquaculture animals, Shanghai 201306, China
- International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Yuyi Wang
- Shanghai Collaborative Innovation Center for Cultivating Elite Breeds and Green-Culture of Aquaculture animals, Shanghai 201306, China
- International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Xiaomeng Hu
- Shanghai Collaborative Innovation Center for Cultivating Elite Breeds and Green-Culture of Aquaculture animals, Shanghai 201306, China
- International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Zhongsheng Zhou
- Shanghai Collaborative Innovation Center for Cultivating Elite Breeds and Green-Culture of Aquaculture animals, Shanghai 201306, China
- International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Youting Zhu
- Shanghai Collaborative Innovation Center for Cultivating Elite Breeds and Green-Culture of Aquaculture animals, Shanghai 201306, China
- International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Xiao Liang
- Shanghai Collaborative Innovation Center for Cultivating Elite Breeds and Green-Culture of Aquaculture animals, Shanghai 201306, China
- International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Jin-Long Yang
- Shanghai Collaborative Innovation Center for Cultivating Elite Breeds and Green-Culture of Aquaculture animals, Shanghai 201306, China
- International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai 201306, China
- Correspondence:
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Xie Z, Enkhjargal B, Nathanael M, Wu L, Zhu Q, Zhang T, Tang J, Zhang JH. Exendin-4 Preserves Blood-Brain Barrier Integrity via Glucagon-Like Peptide 1 Receptor/Activated Protein Kinase-Dependent Nuclear Factor-Kappa B/Matrix Metalloproteinase-9 Inhibition After Subarachnoid Hemorrhage in Rat. Front Mol Neurosci 2022; 14:750726. [PMID: 35002615 PMCID: PMC8733623 DOI: 10.3389/fnmol.2021.750726] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Accepted: 11/26/2021] [Indexed: 11/15/2022] Open
Abstract
In this study, we investigated the role of Exendin-4 (Ex-4), a glucagon-like peptide 1 receptor (GLP-1R) agonist, in blood-brain barrier (BBB) disruption after subarachnoid hemorrhage (SAH) in rats. The endovascular perforation model of SAH was performed in Sprague-Dawley rats. Ex-4 was intraperitoneally injected 1 h after SAH induction. To elucidate the underlying molecular mechanism, small interfering ribonucleic acid (siRNA) for GLP-1R and Dorsomorphin, a specific inhibitor of adenosine monophosphate-activated protein kinase (AMPK), were intracerebroventricularly injected 48 h before induction of SAH correspondingly. Immunofluorescence results supported GLP-1R expressed on the endothelial cells of microvessels in the brain after SAH. Administration of Ex-4 significantly reduced brain water content and Evans blue extravasation in both hemispheres, which improved neurological scores at 24 h after SAH. In the mechanism study, Ex-4 treatment significantly increased the expression of GLP-1R, p-AMPK, IκB-α, Occludin, and Claudin-5, while the expression of p-nuclear factor-kappa B (NF-κB) p65, matrix metalloproteinase-9 (MMP-9), and albumin was significantly decreased. The effects of Ex-4 were reversed by the intervention of GLP-1R siRNA or Dorsomorphin, respectively. In conclusion, Ex-4 could preserve the BBB integrity through GLP-1R/AMPK-dependent NF-κB/MMP-9 inhibition after SAH, which should be further investigated as a potential therapeutic target in SAH.
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Affiliation(s)
- Zhiyi Xie
- Department of Neurosurgery, The Second Affiliated Hospital, Zhejiang University, Hangzhou, China.,Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, United States
| | - Budbazar Enkhjargal
- Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, United States
| | - Matei Nathanael
- Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, United States
| | - Lingyun Wu
- Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, United States
| | - Qiquan Zhu
- Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, United States
| | - Tongyu Zhang
- Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, United States
| | - Jiping Tang
- Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, United States
| | - John H Zhang
- Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, United States
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7
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Kim YK, Hong HK, Yoo HS, Park SP, Park KH. AICAR upregulates ABCA1/ABCG1 expression in the retinal pigment epithelium and reduces Bruch's membrane lipid deposit in ApoE deficient mice. Exp Eye Res 2021; 213:108854. [PMID: 34808137 DOI: 10.1016/j.exer.2021.108854] [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: 09/29/2021] [Revised: 11/15/2021] [Accepted: 11/16/2021] [Indexed: 11/26/2022]
Abstract
The etiology of age-related macular degeneration (AMD) is diverse; however, recent evidence suggests that the lipid metabolism-cholesterol pathway might be associated with the pathophysiology of AMD. The ATP-binding cassette (ABC) transporters, ABCA1 and ABCG1, are essential for the formation of high-density lipoprotein (HDL) and the regulation of macrophage cholesterol efflux. The failure of retinal or retinal pigment epithelium (RPE) cholesterol efflux to remove excess intracellular lipids causes morphological and functional damage to the retina. In this study, we investigated whether treatment with 5-aminoimidazole-4-carboxamide ribonucleotide (AICAR), an AMP-activated protein kinase (AMPK) activator, improves RPE cholesterol efflux and Bruch's membrane (BM) lipid deposits. The protein and mRNA levels of ABCA1 and ABCG1 in ARPE-19 cells and retinal and RPE/choroid tissue from apolipoprotein E-deficient (ApoE-/-) mice were evaluated after 24 weeks of AICAR treatment. The cholesterol efflux capacity of ARPE-19 cells and the cholesterol-accepting capacity of apoB-depleted serum from mice were measured. The thickness of the BM and the degree of lipid deposition were evaluated using electron microscopy. AICAR treatment increased the phosphorylation of AMPK and the protein and mRNA expression of ABCA1 and ABCG1 in vitro. It promoted cholesterol efflux from ARPE-19 cells and upregulated the protein and mRNA levels of ABCA1 and ABCG1 in the retina and RPE in vivo. ApoB-depleted serum from the AICAR-treated group showed enhanced cholesterol-accepting capacity. Long-term treatment with AICAR reduced BM thickening and lipid deposition in ApoE-/- mice. In conclusion, AICAR treatment increased the expression of lipid transporters in the retina and RPE in vivo, facilitated intracellular cholesterol efflux from the RPE in vitro, and improved the functionality of HDL to accept cholesterol effluxed from the cell, possibly via AMPK activation. Collectively, these effects might contribute to the improvement of early age-related pathologic changes in the BM. Pharmacological improvement of RPE cholesterol efflux via AMPK activation may be a potential treatment strategy for AMD.
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Affiliation(s)
- Yong-Kyu Kim
- Department of Ophthalmology, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, South Korea
| | - Hye Kyoung Hong
- Department of Ophthalmology, Seoul National University Bundang Hospital, Seongnam, South Korea
| | - Hyo Soon Yoo
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Bundang Hospital, Seongnam, South Korea; Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Hospital, Seoul, South Korea
| | - Sung Pyo Park
- Department of Ophthalmology, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, South Korea.
| | - Kyu Hyung Park
- Department of Ophthalmology, Seoul National University Bundang Hospital, Seongnam, South Korea; Department of Ophthalmology, Seoul National University College of Medicine, Seoul, South Korea.
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8
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Kong L, Zhang H, Lu C, Shi K, Huang H, Zheng Y, Wang Y, Wang D, Wang H, Huang W. AICAR, an AMP-Activated Protein Kinase Activator, Ameliorates Acute Pancreatitis-Associated Liver Injury Partially Through Nrf2-Mediated Antioxidant Effects and Inhibition of NLRP3 Inflammasome Activation. Front Pharmacol 2021; 12:724514. [PMID: 34531748 PMCID: PMC8438129 DOI: 10.3389/fphar.2021.724514] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Accepted: 08/12/2021] [Indexed: 12/13/2022] Open
Abstract
Acute pancreatitis (AP) is a highly fatal acute inflammation and is often accompanied by multiple organ dysfunction syndrome (MODS). The liver, one of the most vulnerable extrapancreatic organs in AP, is the major organ involved in the evolution of the disease and correlates strongly with the occurrence of MODS. However, the etiology of pancreatitis-associated liver injury (PALI) has not been clarified and currently lacks an effective treatment. 5-Aminoimidazole-4-carboxamide ribonucleotide (AICAR) is a cell permeable nucleoside with pleiotropic effects on anti-inflammatory and antioxidant stress that binds with adenosine monophosphate protein kinase (AMPK) and induces AMPK activation. However, the role of AICAR in PALI remains elusive. Here, we show that activation of AMPK by AICAR, a direct AMPK agonist, significantly ameliorates sodium taurocholate-induced PALI in rats, whereas treatment of PALI rats with the AMPK antagonist Compound C profoundly exacerbates the degree of liver injury, suggesting that hepatic AMPK activation exerts an essential protective role in PALI. Mechanistically, AICAR induces AMPK activation, which in turn activates nuclear factor erythroid 2-related factor 2(Nrf2) -regulated hepatic antioxidant capacity and inhibits NLRP3 inflammasome-mediated pyrolysis, protecting rats from sodium taurocholate-induced PALI. In addition, Nrf2 deficiency strikingly weakens the beneficial effects of AICAR on alleviation of liver injury, oxidative stress and NLRP3 inflammasome activation in L-arginine-induced PALI mice. Thus, AICAR protects against PALI in rodents by triggering AMPK, which is mediated at least in part by Nrf2-modulated antioxidant effects and NLRP3 inflammasome activation.
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Affiliation(s)
- Lijun Kong
- Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Hewei Zhang
- Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Chaosheng Lu
- Department of Pediatrics, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Keqing Shi
- Translational Medicine Laboratory, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Hongjian Huang
- Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Yushu Zheng
- Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Yongqiang Wang
- Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Dan Wang
- Department of Pediatrics, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Hongwei Wang
- Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Wei Huang
- Department of Nutrition, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
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9
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Mayer KA, Smole U, Zhu C, Derdak S, Minervina AA, Salnikova M, Witzeneder N, Christamentl A, Boucheron N, Waidhofer-Söllner P, Trauner M, Hoermann G, Schmetterer KG, Mamedov IZ, Bilban M, Ellmeier W, Pickl WF, Gualdoni GA, Zlabinger GJ. The energy sensor AMPK orchestrates metabolic and translational adaptation in expanding T helper cells. FASEB J 2021; 35:e21217. [PMID: 33715236 PMCID: PMC8252394 DOI: 10.1096/fj.202001763rr] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 11/04/2020] [Accepted: 11/10/2020] [Indexed: 12/21/2022]
Abstract
The importance of cellular metabolic adaptation in inducing robust T cell responses is well established. However, the mechanism by which T cells link information regarding nutrient supply to clonal expansion and effector function is still enigmatic. Herein, we report that the metabolic sensor adenosine monophosphate-activated protein kinase (AMPK) is a critical link between cellular energy demand and translational activity and, thus, orchestrates optimal expansion of T cells in vivo. AMPK deficiency did not affect T cell fate decision, activation, or T effector cell generation; however, the magnitude of T cell responses in murine in vivo models of T cell activation was markedly reduced. This impairment was global, as all T helper cell subsets were similarly sensitive to loss of AMPK which resulted in reduced T cell accumulation in peripheral organs and reduced disease severity in pathophysiologically as diverse models as T cell transfer colitis and allergic airway inflammation. T cell receptor repertoire analysis confirmed similar clonotype frequencies in different lymphoid organs, thereby supporting the concept of a quantitative impairment in clonal expansion rather than a skewed qualitative immune response. In line with these findings, in-depth metabolic analysis revealed a decrease in T cell oxidative metabolism, and gene set enrichment analysis indicated a major reduction in ribosomal biogenesis and mRNA translation in AMPK-deficient T cells. We, thus, provide evidence that through its interference with these delicate processes, AMPK orchestrates the quantitative, but not the qualitative, manifestation of primary T cell responses in vivo.
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Affiliation(s)
- Katharina A Mayer
- Institute of Immunology, Center of Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Ursula Smole
- Institute of Immunology, Center of Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Ci Zhu
- Institute of Immunology, Center of Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria.,Hans Popper Laboratory of Molecular Hepatology, Division of Gastroenterology and Hepatology, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria
| | - Sophia Derdak
- Core Facilities, Medical University of Vienna, Vienna, Austria
| | - Anastasia A Minervina
- Department of Genomics of Adaptive Immunity, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Moscow, Russia
| | - Maria Salnikova
- Department of Genomics of Adaptive Immunity, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Moscow, Russia
| | - Nadine Witzeneder
- Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria.,Division of Hematology and Hemostaseology, Department of Internal Medicine I, Medical University of Vienna, Vienna, Austria
| | - Anna Christamentl
- Institute of Immunology, Center of Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Nicole Boucheron
- Institute of Immunology, Center of Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Petra Waidhofer-Söllner
- Institute of Immunology, Center of Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Michael Trauner
- Hans Popper Laboratory of Molecular Hepatology, Division of Gastroenterology and Hepatology, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria
| | - Gregor Hoermann
- Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria.,MLL Munich Leukemia Laboratory, Munich, Germany
| | - Klaus G Schmetterer
- Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
| | - Ilgar Z Mamedov
- Department of Genomics of Adaptive Immunity, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Moscow, Russia.,Central European Institute of Technology, Masaryk University, Brno, Czech Republic
| | - Martin Bilban
- Core Facilities, Medical University of Vienna, Vienna, Austria.,Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
| | - Wilfried Ellmeier
- Institute of Immunology, Center of Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Winfried F Pickl
- Institute of Immunology, Center of Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Guido A Gualdoni
- Division of Nephrology and Dialysis, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria
| | - Gerhard J Zlabinger
- Institute of Immunology, Center of Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
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10
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Li B, Yang L. Creatine in T Cell Antitumor Immunity and Cancer Immunotherapy. Nutrients 2021; 13:nu13051633. [PMID: 34067957 PMCID: PMC8152274 DOI: 10.3390/nu13051633] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 05/03/2021] [Accepted: 05/11/2021] [Indexed: 12/25/2022] Open
Abstract
Creatine is a broadly used dietary supplement that has been extensively studied for its benefit on the musculoskeletal system. Yet, there is limited knowledge regarding the metabolic regulation of creatine in cells beyond the muscle. New insights concerning various regulatory functions for creatine in other physiological systems are developing. Here, we highlight the latest advances in understanding creatine regulation of T cell antitumor immunity, a topic that has previously gained little attention in the creatine research field. Creatine has been identified as an important metabolic regulator conserving bioenergy to power CD8 T cell antitumor reactivity in a tumor microenvironment; creatine supplementation has been shown to enhance antitumor T cell immunity in multiple preclinical mouse tumor models and, importantly, to synergize with other cancer immunotherapy modalities, such as the PD-1/PD-L1 blockade therapy, to improve antitumor efficacy. The potential application of creatine supplementation for cancer immunotherapy and the relevant considerations are discussed.
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Affiliation(s)
- Bo Li
- Department of Microbiology, Immunology & Molecular Genetics, University of California, Los Angeles, Los Angeles, CA 90095, USA
- Correspondence: (B.L.); (L.Y.)
| | - Lili Yang
- Department of Microbiology, Immunology & Molecular Genetics, University of California, Los Angeles, Los Angeles, CA 90095, USA
- Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California, Los Angeles, Los Angeles, CA 90095, USA
- Jonsson Comprehensive Cancer Center, The David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA
- Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA 90095, USA
- Correspondence: (B.L.); (L.Y.)
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11
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Sun G, Shvab A, Leclerc GJ, Li B, Beckedorff F, Shiekhattar R, Barredo JC. Protein Kinase D-Dependent Downregulation of Immediate Early Genes through Class IIA Histone Deacetylases in Acute Lymphoblastic Leukemia. Mol Cancer Res 2021; 19:1296-1307. [PMID: 33980612 DOI: 10.1158/1541-7786.mcr-20-0808] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 03/12/2021] [Accepted: 05/04/2021] [Indexed: 11/16/2022]
Abstract
Acute lymphoblastic leukemia (ALL) is a leading cause of cancer-related death in children and adolescents, and cure rates for relapsed/refractory ALL remain dismal, highlighting the need for novel targeted therapies. To identify genome-wide metabolic-stress regulated genes, we used RNA-sequencing in ALL cells treated with AICAR, an AMPK activator. RNA-sequencing identified the immediate early genes (IEGs) as a subset of genes downregulated by AICAR. We show that AICAR-induced IEGs downregulation was blocked by an adenosine uptake inhibitor indicating AICAR was responsible for IEGs reprogramming. Using pharmacologic and genetic models we established this mechanism was AMPK-independent. Further investigations using kinase assays, PKD/PKC inhibitors and rescue experiments, demonstrated that AICAR directly inhibited PKD kinase activity and identified PKD as responsible for IEGs downregulation. Mechanistically, PKD inhibition suppressed phosphorylation and nuclear export of class IIa HDACs, which lowered histone H3 acetylation and decreased NFκB(p65) recruitment to IEGs promoters. Finally, PKD inhibition induced apoptosis via DUSP1/DUSP6 downregulation eliciting a DNA damage response. More importantly, ALL patient cells exhibited the same PKD-HDACs-IEGs-mediated mechanism. As proof of principle of the therapeutic potential of targeting PKD, we established the in vivo relevance of our findings using an NSG ALL mouse model. In conclusion, we identified a previously unreported PKD-dependent survival mechanism in response to AICAR-induced cellular stress in ALL through regulation of DUSPs and IEGs' expression. IMPLICATIONS: PKD mediates early transcriptional responses in ALL cells as an adaptive survival mechanism to overcome cellular stress.
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Affiliation(s)
- Guangyan Sun
- Department of Pediatrics, University of Miami Miller School of Medicine, Miami, Florida
| | - Anna Shvab
- Cancer Biology Program, University of Miami Miller School of Medicine, Miami, Florida
| | - Guy J Leclerc
- Department of Pediatrics, University of Miami Miller School of Medicine, Miami, Florida
| | - Bin Li
- Stemsynergy Therapeutics, Inc, Miami, Florida
| | - Felipe Beckedorff
- Department of Human Genetics, University of Miami Miller School of Medicine, Miami, Florida
| | - Ramin Shiekhattar
- Department of Human Genetics, University of Miami Miller School of Medicine, Miami, Florida.,Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, Florida
| | - Julio C Barredo
- Department of Pediatrics, University of Miami Miller School of Medicine, Miami, Florida. .,Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, Florida.,Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, Florida.,Department of Medicine, University of Miami Miller School of Medicine, Miami, Florida
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12
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Chen TT, Zhou X, Xu YN, Li Y, Wu XY, Xiang Q, Fu LY, Hu XX, Tao L, Shen XC. Gastrodin ameliorates learning and memory impairment in rats with vascular dementia by promoting autophagy flux via inhibition of the Ca 2+/CaMKII signal pathway. Aging (Albany NY) 2021; 13:9542-9565. [PMID: 33714957 PMCID: PMC8064221 DOI: 10.18632/aging.202667] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Accepted: 11/30/2020] [Indexed: 12/12/2022]
Abstract
Vascular dementia (VD) is a common disease that occurs during human aging. Gastrodin (GAS) has potential benefits for the prevention and treatment of VD. In the present study, we investigated the effects of GAS on cognitive dysfunction in rats with VD induced by permanent middle cerebral artery occlusion (pMCAO) and explored the underlying mechanism. Immunohistochemical and western blot analyses revealed that GAS attenuated hippocampal levels of LC3 (microtubule-associated protein 1 light chain 3), p62, and phosphorylated CaMKII (Ca2+-calmodulin stimulated protein kinase II) in VD rats. Additionally, our results revealed that cobalt chloride blocked autophagic flux in HT22 cells, which was confirmed by increased levels of LC3 and p62 when combined with chloroquine. Notably, GAS ameliorated the impaired autophagic flux. Furthermore, we confirmed that GAS combined with KN93 (a CaMKII inhibitor) or CaMKII knockdown did not impact the reduced p62 levels when compared with GAS treatment alone. Furthermore, a co-immunoprecipitation assay demonstrated that endogenous p62 bound to CaMKII, as confirmed by mass spectrometric analysis after the immunoprecipitation of p62 from HT22 cells. These findings revealed that GAS attenuated autophagic flux dysfunction by inhibiting the Ca2+/CaMKII signaling pathway to ameliorate cognitive impairment in VD.
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Affiliation(s)
- Ting-Ting Chen
- The High Efficacy Application of Natural Medicinal Resources Engineering Center of Guizhou Province and The High Educational Key Laboratory of Guizhou Province for Natural Medicinal Pharmacology and Druggability, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, P.R. China.,Guiyang Maternal and Child Health-Care Hospital, Guiyang 550000, P.R. China.,The Key Laboratory of Optimal Utilization of Natural Medicine Resources and The Union Key Laboratory of Guiyang City, Guizhou Medical University, School of Pharmaceutical Sciences, Guiyang 550025, P.R. China
| | - Xue Zhou
- The High Efficacy Application of Natural Medicinal Resources Engineering Center of Guizhou Province and The High Educational Key Laboratory of Guizhou Province for Natural Medicinal Pharmacology and Druggability, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, P.R. China
| | - Yi-Ni Xu
- The High Efficacy Application of Natural Medicinal Resources Engineering Center of Guizhou Province and The High Educational Key Laboratory of Guizhou Province for Natural Medicinal Pharmacology and Druggability, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, P.R. China
| | - Yue Li
- Guiyang Maternal and Child Health-Care Hospital, Guiyang 550000, P.R. China
| | - Xiao-Ying Wu
- The High Efficacy Application of Natural Medicinal Resources Engineering Center of Guizhou Province and The High Educational Key Laboratory of Guizhou Province for Natural Medicinal Pharmacology and Druggability, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, P.R. China.,The Key Laboratory of Optimal Utilization of Natural Medicine Resources and The Union Key Laboratory of Guiyang City, Guizhou Medical University, School of Pharmaceutical Sciences, Guiyang 550025, P.R. China
| | - Quan Xiang
- The High Efficacy Application of Natural Medicinal Resources Engineering Center of Guizhou Province and The High Educational Key Laboratory of Guizhou Province for Natural Medicinal Pharmacology and Druggability, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, P.R. China.,The Key Laboratory of Endemic and Ethnic Diseases of Ministry of Education, Guizhou Medical University, Guiyang 550025, P.R. China
| | - Ling-Yun Fu
- The High Efficacy Application of Natural Medicinal Resources Engineering Center of Guizhou Province and The High Educational Key Laboratory of Guizhou Province for Natural Medicinal Pharmacology and Druggability, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, P.R. China.,The Key Laboratory of Endemic and Ethnic Diseases of Ministry of Education, Guizhou Medical University, Guiyang 550025, P.R. China
| | - Xiao-Xia Hu
- The High Efficacy Application of Natural Medicinal Resources Engineering Center of Guizhou Province and The High Educational Key Laboratory of Guizhou Province for Natural Medicinal Pharmacology and Druggability, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, P.R. China.,The Key Laboratory of Endemic and Ethnic Diseases of Ministry of Education, Guizhou Medical University, Guiyang 550025, P.R. China
| | - Ling Tao
- The High Efficacy Application of Natural Medicinal Resources Engineering Center of Guizhou Province and The High Educational Key Laboratory of Guizhou Province for Natural Medicinal Pharmacology and Druggability, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, P.R. China
| | - Xiang-Chun Shen
- The High Efficacy Application of Natural Medicinal Resources Engineering Center of Guizhou Province and The High Educational Key Laboratory of Guizhou Province for Natural Medicinal Pharmacology and Druggability, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, P.R. China.,The Key Laboratory of Optimal Utilization of Natural Medicine Resources and The Union Key Laboratory of Guiyang City, Guizhou Medical University, School of Pharmaceutical Sciences, Guiyang 550025, P.R. China.,The Key Laboratory of Endemic and Ethnic Diseases of Ministry of Education, Guizhou Medical University, Guiyang 550025, P.R. China
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13
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Lu Y, Ma J, Li P, Liu B, Wen X, Yang J. Ilexgenin A restrains CRTC2 in the cytoplasm to prevent SREBP1 maturation via AMP kinase activation in the liver. Br J Pharmacol 2021; 179:958-978. [PMID: 33434948 DOI: 10.1111/bph.15369] [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: 08/05/2020] [Revised: 10/02/2020] [Accepted: 12/21/2020] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND AND PURPOSE Ilexgenin A is a triterpenoid from ShanLv Cha with beneficial effects on metabolic homeostasis. We investigated whether ilexgenin A could inhibit hepatic de novo fatty acid synthesis via the interfering with SREBP1 maturation. EXPERIMENTAL APPROACH The effects of Ilexgenin A on CRTC2 translocation and SREBP1 maturation were investigated in the liver of fasted mice and hepatocytes exposed to saturated fatty acids. The effect of Iilexgenin A on hepatic lipid accumulation was also observed in high-fat diet fed mice. KEY RESULTS Sec23A and Sec31A are two subunits of COPII complex and their interaction is essential for the processing of SREBP1 maturation. Ilexgenin A activates AMPK by reducing cellular energy and preventing cytoplasmic CRTC2 to compete with Sec23A for binding to Sec31A under nutrient-rich conditions. Consequently, ilexgenin A impaired COPII-dependent SREBP1 maturation via disrupting Sec31A-Sec23A interaction, leading to the inhibition of de novo fatty acid synthesis in the liver. In contrast, mTORC1 phosphorylated Ser136 of CRTC2, facilitating the formation of Sec31A-Sec23A interaction to promote SREBP1 maturation, whereas this action was reversed by ilexgenin A in an AMPK-dependent manner. Ilexgenin A protected CRTC2 function and restrained hepatic lipogenic response in high fat diet-fed mice, providing in vivo evidence to support the beneficial effects of ilexgenin A on lipid metabolism. CONCLUSIONS AND IMPLICATIONS Ilexgenin A activated AMPK and restrained CRTC2 to the cytoplasm to prevent SREBP1 maturation via impairing COPII function in the liver. This suggests that CRTC2 might be a potential target for pharmacological intervention to prevent hepatic lipid deposition.
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Affiliation(s)
- Yawen Lu
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Jingjie Ma
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Ping Li
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Baolin Liu
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Xiaodong Wen
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Jie Yang
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
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14
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Saguyod SJU, Alhallak I, Simmen RCM, Velarde MC. Metformin regulation of progesterone receptor isoform-B expression in human endometrial cancer cells is glucose-dependent. Oncol Lett 2020; 20:249. [PMID: 32994812 PMCID: PMC7509689 DOI: 10.3892/ol.2020.12112] [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: 03/19/2020] [Accepted: 08/25/2020] [Indexed: 11/17/2022] Open
Abstract
Metformin (MET) constitutes the first-line treatment against type 2 diabetes. Growing evidence linking insulin resistance and cancer risk has expanded the therapeutic potential of MET to several cancer types. However, the oncostatic mechanisms of MET are not well understood. MET has been shown to promote the expression of progesterone receptor (PGR) and other antitumor biomarkers in patients with non-diabetic endometrial cancer (EC) and in Ishikawa EC cells cultured in normal glucose (5.5 mM) media. Therefore, the present study aimed to assess the effects of MET on EC cells under conditions simulating diabetes. Ishikawa cells treated with 10 nM 17β-estradiol (E2) and/or 100 µM MET and exposed to normal and high (17.5 mM) concentrations of glucose were evaluated for proliferative and PGR expression status. Under normal glucose conditions, MET attenuated E2-induced cell proliferation and cyclin D1 gene expression, and increased total PGR and PGR-B transcript levels. MET inhibited Ishikawa cell spheroid formation only in the absence of E2 treatment. In E2-treated cells under high glucose conditions, MET showed no effects on cell proliferation and spheroid formation, and increased total PGR but not PGR-B transcript levels. Transfection with Krüppel-like factor 9 small interfering RNA increased PGR-A transcript levels, irrespective of glucose environment. Medroxyprogesterone acetate downregulated PGR-A expression more effectively with metformin under high compared with normal glucose conditions. To evaluate the potential mechanisms underlying the targeting of PGR by MET, E2-treated cells were incubated with MET and the AMPK inhibitor Compound C, or with the AMPK activator 5-aminoimidazole-4-carboxamide ribonucleotide (AICAR), under normal glucose conditions. Compound C abrogated the effects of MET on PGR-B while AICAR increased PGR-B transcript levels, albeit less effectively compared with MET. The present results demonstrate the glucose-dependent effects of MET on PGR-B isoform expression, which may inform the response to progestin therapy in diabetic women with EC.
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Affiliation(s)
- Sofia Jade U Saguyod
- Institute of Biology, College of Science, University of the Philippines Diliman, Quezon City, PH 1101, Philippines
| | - Iad Alhallak
- Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Rosalia C M Simmen
- Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.,The Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Michael C Velarde
- Institute of Biology, College of Science, University of the Philippines Diliman, Quezon City, PH 1101, Philippines
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15
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Synphilin-1 Interacts with AMPK and Increases AMPK Phosphorylation. Int J Mol Sci 2020; 21:ijms21124352. [PMID: 32570982 PMCID: PMC7352261 DOI: 10.3390/ijms21124352] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 06/08/2020] [Accepted: 06/09/2020] [Indexed: 01/16/2023] Open
Abstract
A role for the cytoplasmic protein synphilin-1 in regulating energy balance has been demonstrated recently. Expression of synphilin-1 increases ATP levels in cultured cells. However, the mechanism by which synphilin-1 alters cellular energy status is unknown. Here, we used cell models and biochemical approaches to investigate the cellular functions of synphilin-1 on the AMP-activated protein kinase (AMPK) signaling pathway, which may affect energy balance. Overexpression of synphilin-1 increased AMPK phosphorylation (activation). Moreover, synphilin-1 interacted with AMPK by co-immunoprecipitation and GST (glutathione S-transferase) pull-down assays. Knockdown of synphilin-1 reduced AMPK phosphorylation. Overexpression of synphilin-1 also altered AMPK downstream signaling, i.e., a decrease in acetyl CoA carboxylase (ACC) phosphorylation, and an increase in p70S6K phosphorylation. Treatment of compound C (an AMPK inhibitor) reduced synphilin-1 binding with AMPK. In addition, compound C diminished synphilin-1-induced AMPK phosphorylation, and the increase in cellular ATP (adenosine triphosphate) levels. Our results demonstrated that synphilin-1 couples with AMPK, and they exert mutual effects on each other to regulate cellular energy status. These findings not only identify novel cellular actions of synphilin-1, but also provide new insights into the roles of synphilin-1 in regulating energy currency, ATP.
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16
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Chaib M, Chauhan SC, Makowski L. Friend or Foe? Recent Strategies to Target Myeloid Cells in Cancer. Front Cell Dev Biol 2020; 8:351. [PMID: 32509781 PMCID: PMC7249856 DOI: 10.3389/fcell.2020.00351] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 04/21/2020] [Indexed: 12/12/2022] Open
Abstract
The tumor microenvironment (TME) is a complex network of epithelial and stromal cells, wherein stromal components provide support to tumor cells during all stages of tumorigenesis. Among these stromal cell populations are myeloid cells, which are comprised mainly of tumor-associated macrophages (TAM), dendritic cells (DC), myeloid-derived suppressor cells (MDSC), and tumor-associated neutrophils (TAN). Myeloid cells play a major role in tumor growth through nurturing cancer stem cells by providing growth factors and metabolites, increasing angiogenesis, as well as promoting immune evasion through the creation of an immune-suppressive microenvironment. Immunosuppression in the TME is achieved by preventing critical anti-tumor immune responses by natural killer and T cells within the primary tumor and in metastatic niches. Therapeutic success in targeting myeloid cells in malignancies may prove to be an effective strategy to overcome chemotherapy and immunotherapy limitations. Current therapeutic approaches to target myeloid cells in various cancers include inhibition of their recruitment, alteration of function, or functional re-education to an antitumor phenotype to overcome immunosuppression. In this review, we describe strategies to target TAMs and MDSCs, consisting of single agent therapies, nanoparticle-targeted approaches and combination therapies including chemotherapy and immunotherapy. We also summarize recent molecular targets that are specific to myeloid cell populations in the TME, while providing a critical review of the limitations of current strategies aimed at targeting a single subtype of the myeloid cell compartment. The goal of this review is to provide the reader with an understanding of the critical role of myeloid cells in the TME and current therapeutic approaches including ongoing or recently completed clinical trials.
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Affiliation(s)
- Mehdi Chaib
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Tennessee Health Science Center, Memphis, TN, United States
| | - Subhash C Chauhan
- South Texas Center of Excellence in Cancer Research, School of Medicine, University of Texas Rio Grande Valley, Brownsville, TX, United States.,Department of Immunology and Microbiology, School of Medicine, University of Texas Rio Grande Valley, Brownsville, TX, United States
| | - Liza Makowski
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Tennessee Health Science Center, Memphis, TN, United States.,Division of Hematology Oncology, Department of Medicine, The University of Tennessee Health Science Center, Memphis, TN, United States.,Center for Cancer Research, The University of Tennessee Health Science Center, Memphis, TN, United States
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17
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Zhang Z, Li F, Tian Y, Cao L, Gao Q, Zhang C, Zhang K, Shen C, Ping Y, Maimela NR, Wang L, Zhang B, Zhang Y. Metformin Enhances the Antitumor Activity of CD8 + T Lymphocytes via the AMPK-miR-107-Eomes-PD-1 Pathway. THE JOURNAL OF IMMUNOLOGY 2020; 204:2575-2588. [PMID: 32221038 DOI: 10.4049/jimmunol.1901213] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 02/01/2020] [Indexed: 01/04/2023]
Abstract
Metformin has been studied for its anticancer effects by regulating T cell functions. However, the mechanisms through which metformin stimulates the differentiation of memory T cells remain unclear. We found that the frequencies of memory stem and central memory T cells increased for both in peripheral and tumor-infiltrating CD8+ T cells in metformin-treated lung cancer patients compared with those not taking the medication. An in vitro assay showed that metformin promoted the formation of memory CD8+ T cells and enhanced their antiapoptotic abilities. In addition, AMP-activated protein kinase (AMPK) activation decreased microRNA-107 expression, thus enhancing Eomesodermin expression, which suppressed the transcription of PDCD1 in metformin-treated CD8+ T cells. In the CAR-T cell therapy model, metformin also exhibited cytotoxicity-promoting effects that led to decreased tumor growth. Metformin could reprogram the differentiation of CD8+ T cells, which may benefit the clinical therapy of cancer patients by facilitating long-lasting cytotoxic functions.
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Affiliation(s)
- Zhen Zhang
- Biotherapy Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Feng Li
- Biotherapy Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Yonggui Tian
- Biotherapy Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China.,School of Life Sciences, Zhengzhou University, Zhengzhou 450052, Henan, China
| | - Ling Cao
- Biotherapy Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Qun Gao
- Biotherapy Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Chaoqi Zhang
- Biotherapy Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Kai Zhang
- Biotherapy Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Chunyi Shen
- Biotherapy Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Yu Ping
- Biotherapy Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China
| | | | - Liping Wang
- Cancer Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Bin Zhang
- Department of Hematology/Oncology, School of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL 60611; and
| | - Yi Zhang
- Biotherapy Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China; .,School of Life Sciences, Zhengzhou University, Zhengzhou 450052, Henan, China.,Cancer Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China.,Henan Key Laboratory for Tumor Immunology and Biotherapy, Zhengzhou, Henan 450052, China
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18
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Singh S, Singh PK, Suhail H, Arumugaswami V, Pellett PE, Giri S, Kumar A. AMP-Activated Protein Kinase Restricts Zika Virus Replication in Endothelial Cells by Potentiating Innate Antiviral Responses and Inhibiting Glycolysis. THE JOURNAL OF IMMUNOLOGY 2020; 204:1810-1824. [PMID: 32086387 DOI: 10.4049/jimmunol.1901310] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 01/18/2020] [Indexed: 12/17/2022]
Abstract
Viruses are known to perturb host cellular metabolism to enable their replication and spread. However, little is known about the interactions between Zika virus (ZIKV) infection and host metabolism. Using primary human retinal vascular endothelial cells and an established human endothelial cell line, we investigated the role of AMP-activated protein kinase (AMPK), a master regulator of energy metabolism, in response to ZIKV challenge. ZIKV infection caused a time-dependent reduction in the active phosphorylated state of AMPK and of its downstream target acetyl-CoA carboxylase. Pharmacological activation of AMPK using 5-aminoimidazole-4-carboxamide ribonucleotide (AICAR), metformin, and a specific AMPKα activator (GSK621) attenuated ZIKV replication. This activity was reversed by an AMPK inhibitor (compound C). Lentivirus-mediated knockdown of AMPK and the use of AMPKα-/- mouse embryonic fibroblasts provided further evidence that AMPK has an antiviral effect on ZIKV replication. Consistent with its antiviral effect, AMPK activation potentiated the expression of genes with antiviral properties (e.g., IFNs, OAS2, ISG15, and MX1) and inhibited inflammatory mediators (e.g., TNF-α and CCL5). Bioenergetic analysis showed that ZIKV infection evokes a glycolytic response, as evidenced by elevated extracellular acidification rate and increased expression of key glycolytic genes (GLUT1, HK2, TPI, and MCT4); activation of AMPK by AICAR treatment reduced this response. Consistent with this, 2-deoxyglucose, an inhibitor of glycolysis, augmented AMPK activity and attenuated ZIKV replication. Thus, our study demonstrates that the anti-ZIKV effect of AMPK signaling in endothelial cells is mediated by reduction of viral-induced glycolysis and enhanced innate antiviral responses.
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Affiliation(s)
- Sneha Singh
- Department of Ophthalmology, Visual, and Anatomical Sciences, Wayne State University, Detroit, MI 48201
| | - Pawan Kumar Singh
- Department of Ophthalmology, Visual, and Anatomical Sciences, Wayne State University, Detroit, MI 48201
| | - Hamid Suhail
- Department of Neurology, Henry Ford Health Systems, Detroit, MI 48202
| | | | - Philip E Pellett
- Department of Biochemistry, Microbiology, and Immunology, Wayne State University, Detroit, MI 48201
| | - Shailendra Giri
- Department of Neurology, Henry Ford Health Systems, Detroit, MI 48202
| | - Ashok Kumar
- Department of Ophthalmology, Visual, and Anatomical Sciences, Wayne State University, Detroit, MI 48201; .,Department of Biochemistry, Microbiology, and Immunology, Wayne State University, Detroit, MI 48201
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19
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Zhao DY, Yu DD, Ren L, Bi GR. Ligustilide protects PC12 cells from oxygen-glucose deprivation/reoxygenation-induced apoptosis via the LKB1-AMPK-mTOR signaling pathway. Neural Regen Res 2020; 15:473-481. [PMID: 31571659 PMCID: PMC6921349 DOI: 10.4103/1673-5374.266059] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Autophagy has been shown to have a protective effect against brain damage. Ligustilide (LIG) is a bioactive substance isolated from Ligusticum chuanxiong, a traditional Chinese medicine. LIG has a neuroprotective effect; however, it is unclear whether this neuroprotective effect involves autophagy. In this study, PC12 cells were treated with 1 × 10–5–1 × 10–9 M LIG for 0, 3, 12 or 24 hours, and cell proliferation was evaluated using the 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium (MTS) assay. Treatment with 1 × 10–6 M LIG for 3 hours had the greatest effect on cell proliferation, and was therefore used for subsequent experiments. PC12 cells were pre-treated with 1 × 10–6 M LIG for 3 hours, cultured in 95% N2/5% CO2 in Dulbecco’s modified Eagle’s medium without glucose or serum for 4 hours, and then cultured normally for 16 hours, to simulate oxygen-glucose deprivation/reoxygenation (OGD/R). Cell proliferation was assessed with the MTS assay. Apoptosis was detected by flow cytometry. The expression levels of apoptosis-related proteins, Bcl-2 and Bax, autophagy-related proteins, Beclin 1 and microtubule-associated protein l light chain 3B (LC3-II), and liver kinase B1 (LKB1)-5′-adenosine monophosphate-activated protein kinase (AMPK)-mammalian target of rapamycin (mTOR) signaling pathway-related proteins were assessed by western blot assay. Immunofluorescence staining was used to detect LC3-II expression. Autophagosome formation was observed by electron microscopy. LIG significantly decreased apoptosis, increased Bcl-2, Beclin 1 and LC3-II expression, decreased Bax expression, increased LC3-II immunoreactivity and the number of autophagosomes, and activated the LKB1-AMPK-mTOR signaling pathway in PC12 cells exposed to OGD/R. The addition of the autophagy inhibitor 3-methyladenine or dorsomorphin before OGD/R attenuated the activation of the LKB1-AMPK-mTOR signaling pathway in cells treated with LIG. Taken together, our findings show that LIG promotes autophagy and protects PC12 cells from apoptosis induced by OGD/R via the LKB1-AMPK-mTOR signaling pathway.
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Affiliation(s)
- Dan-Yang Zhao
- Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, China; The First People's Hospital of Shenyang, Shenyang, Liaoning Province, China
| | - Dong-Dong Yu
- The First Affiliated Hospital of Liaoning University of Traditional Chinese Medicine, Shenyang, Liaoning Province, China
| | - Li Ren
- The First People's Hospital of Shenyang, Shenyang, Liaoning Province, China
| | - Guo-Rong Bi
- Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, China
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20
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Bao H, Zhang Q, Liu X, Song Y, Li X, Wang Z, Li C, Peng A, Gong R. Lithium targeting of AMPK protects against cisplatin-induced acute kidney injury by enhancing autophagy in renal proximal tubular epithelial cells. FASEB J 2019; 33:14370-14381. [PMID: 31661633 DOI: 10.1096/fj.201901712r] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Autophagy has been demonstrated to be vital for kidney homeostasis and is centrally implicated in the pathogenesis of cisplatin-induced acute kidney injury (AKI). Lithium is a potent autophagy inducer in a number of cell types. However, it remains uncertain whether its autophagic activity is associated with a beneficial effect on renal tubular cells in AKI. This study aimed to examine the effect of lithium on renal autophagy in cisplatin-induced AKI. Mice or renal proximal tubular epithelial cells in culture were exposed to cisplatin-induced acute injury in the presence or absence of lithium treatment. AKI or tubular cell injury was evaluated, and cell signaling associated with autophagy was examined. Lithium pretreatment prominently ameliorated acute renal tubular damage in mice exposed to cisplatin insult, associated with enhanced autophagy in renal tubules, as assessed by measuring microtubule-associated protein 1A/1B-light chain 3 (LC3)BII/I expression and autophagosome formation. Consistently, in cisplatin-injured renal tubular cells in vitro, lithium enhanced autophagic activities, improved cell viability, and attenuated cell death. Mechanistically, lithium triggered AMPK-α phosphorylation and activation, which in turn positively correlated with the induced expression of autophagy-related molecules, like mammalian target of rapamycin and LC3BII/I. AMPK-α activation is likely required for lithium-induced tubular cell autophagy and protection in cisplatin-induced AKI because blockade of AMPK-α phosphorylation by compound C markedly abrogated lithium-induced autophagosome formation and mitigated the protective effect of lithium on AKI. Our findings suggest that lithium represents a promising therapeutic strategy for protecting renal tubular cells against cisplatin-induced AKI by enhancing autophagy via AMPK-α activation.-Bao, H., Zhang, Q., Liu, X., Song, Y., Li, X., Wang, Z., Li, C., Peng, A., Gong, R. Lithium targeting of AMPK protects against cisplatin-induced acute kidney injury by enhancing autophagy in renal proximal tubular epithelial cells.
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Affiliation(s)
- Hui Bao
- Department of Nephrology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China.,Center for Nephrology and Clinical Metabolomics, Tongji University School of Medicine, Shanghai, China.,Division of Kidney Disease and Hypertension, Department of Medicine, Rhode Island Hospital, Brown University School of Medicine, Providence, Rhode Island, USA
| | - Qianyun Zhang
- Department of Nephrology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China.,Center for Nephrology and Clinical Metabolomics, Tongji University School of Medicine, Shanghai, China
| | - Xinying Liu
- Department of Nephrology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China.,Center for Nephrology and Clinical Metabolomics, Tongji University School of Medicine, Shanghai, China
| | - Yaxiang Song
- Department of Nephrology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China.,Center for Nephrology and Clinical Metabolomics, Tongji University School of Medicine, Shanghai, China
| | - Xinhua Li
- Department of Nephrology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China.,Center for Nephrology and Clinical Metabolomics, Tongji University School of Medicine, Shanghai, China
| | - Zhen Wang
- Department of Nephrology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China.,Center for Nephrology and Clinical Metabolomics, Tongji University School of Medicine, Shanghai, China.,Division of Kidney Disease and Hypertension, Department of Medicine, Rhode Island Hospital, Brown University School of Medicine, Providence, Rhode Island, USA
| | - Changbin Li
- Department of Nephrology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China.,Center for Nephrology and Clinical Metabolomics, Tongji University School of Medicine, Shanghai, China.,Division of Kidney Disease and Hypertension, Department of Medicine, Rhode Island Hospital, Brown University School of Medicine, Providence, Rhode Island, USA
| | - Ai Peng
- Department of Nephrology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China.,Center for Nephrology and Clinical Metabolomics, Tongji University School of Medicine, Shanghai, China
| | - Rujun Gong
- Division of Kidney Disease and Hypertension, Department of Medicine, Rhode Island Hospital, Brown University School of Medicine, Providence, Rhode Island, USA.,Division of Nephrology, Department of Medicine, University of Toledo College of Medicine, Toledo, Ohio, USA
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21
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Di Biase S, Ma X, Wang X, Yu J, Wang YC, Smith DJ, Zhou Y, Li Z, Kim YJ, Clarke N, To A, Yang L. Creatine uptake regulates CD8 T cell antitumor immunity. J Exp Med 2019; 216:2869-2882. [PMID: 31628186 PMCID: PMC6888972 DOI: 10.1084/jem.20182044] [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: 11/03/2018] [Revised: 04/20/2019] [Accepted: 09/17/2019] [Indexed: 12/19/2022] Open
Abstract
Di Biase et al. show for the first time that creatine acts as a “molecular battery” conserving bioenergy to power CD8 T cell activities; that creatine uptake is critical in supporting antitumor T cell immunity; and that creatine supplementation holds promise for improving cancer immunotherapy. T cells demand massive energy to combat cancer; however, the metabolic regulators controlling antitumor T cell immunity have just begun to be unveiled. When studying nutrient usage of tumor-infiltrating immune cells in mice, we detected a sharp increase of the expression of a CrT (Slc6a8) gene, which encodes a surface transporter controlling the uptake of creatine into a cell. Using CrT knockout mice, we showed that creatine uptake deficiency severely impaired antitumor T cell immunity. Supplementing creatine to WT mice significantly suppressed tumor growth in multiple mouse tumor models, and the combination of creatine supplementation with a PD-1/PD-L1 blockade treatment showed synergistic tumor suppression efficacy. We further demonstrated that creatine acts as a “molecular battery” conserving bioenergy to power T cell activities. Therefore, our results have identified creatine as an important metabolic regulator controlling antitumor T cell immunity, underscoring the potential of creatine supplementation to improve T cell–based cancer immunotherapies.
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Affiliation(s)
- Stefano Di Biase
- Department of Microbiology, Immunology & Molecular Genetics, University of California, Los Angeles, Los Angeles, CA
| | - Xiaoya Ma
- Department of Microbiology, Immunology & Molecular Genetics, University of California, Los Angeles, Los Angeles, CA
| | - Xi Wang
- Department of Microbiology, Immunology & Molecular Genetics, University of California, Los Angeles, Los Angeles, CA
| | - Jiaji Yu
- Department of Microbiology, Immunology & Molecular Genetics, University of California, Los Angeles, Los Angeles, CA
| | - Yu-Chen Wang
- Department of Microbiology, Immunology & Molecular Genetics, University of California, Los Angeles, Los Angeles, CA
| | - Drake J Smith
- Department of Microbiology, Immunology & Molecular Genetics, University of California, Los Angeles, Los Angeles, CA
| | - Yang Zhou
- Department of Microbiology, Immunology & Molecular Genetics, University of California, Los Angeles, Los Angeles, CA
| | - Zhe Li
- Department of Microbiology, Immunology & Molecular Genetics, University of California, Los Angeles, Los Angeles, CA
| | - Yu Jeong Kim
- Department of Microbiology, Immunology & Molecular Genetics, University of California, Los Angeles, Los Angeles, CA
| | - Nicole Clarke
- Department of Microbiology, Immunology & Molecular Genetics, University of California, Los Angeles, Los Angeles, CA
| | - Angela To
- Department of Microbiology, Immunology & Molecular Genetics, University of California, Los Angeles, Los Angeles, CA
| | - Lili Yang
- Department of Microbiology, Immunology & Molecular Genetics, University of California, Los Angeles, Los Angeles, CA .,Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California, Los Angeles, Los Angeles, CA.,Jonsson Comprehensive Cancer Center, the David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA.,Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA
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22
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Takahara M, Takaki A, Hiraoka S, Adachi T, Shimomura Y, Matsushita H, Nguyen TTT, Koike K, Ikeda A, Takashima S, Yamasaki Y, Inokuchi T, Kinugasa H, Sugihara Y, Harada K, Eikawa S, Morita H, Udono H, Okada H. Berberine improved experimental chronic colitis by regulating interferon-γ- and IL-17A-producing lamina propria CD4 + T cells through AMPK activation. Sci Rep 2019; 9:11934. [PMID: 31417110 PMCID: PMC6695484 DOI: 10.1038/s41598-019-48331-w] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 08/02/2019] [Indexed: 01/04/2023] Open
Abstract
The herbal medicine berberine (BBR) has been recently shown to be an AMP-activated protein kinase (AMPK) productive activator with various properties that induce anti-inflammatory responses. We investigated the effects of BBR on the mechanisms of mucosal CD4+T cell activation in vitro and on the inflammatory responses in T cell transfer mouse models of inflammatory bowel disease (IBD). We examined the favorable effects of BBR in vitro, using lamina propria (LP) CD4+ T cells in T cell transfer IBD models in which SCID mice had been injected with CD4+CD45RBhigh T cells. BBR suppressed the frequency of IFN-γ- and Il-17A-producing LP CD4+ T cells. This effect was found to be regulated by AMPK activation possibly induced by oxidative phosphorylation inhibition. We then examined the effects of BBR on the same IBD models in vivo. BBR-fed mice showed AMPK activation in the LPCD4+ T cells and an improvement of colitis. Our study newly showed that the BBR-induced AMPK activation of mucosal CD4+ T cells resulted in an improvement of IBD and underscored the importance of AMPK activity in colonic inflammation.
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Affiliation(s)
- Masahiro Takahara
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan.
| | - Akinobu Takaki
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Sakiko Hiraoka
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Takuya Adachi
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Yasuyuki Shimomura
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Hiroshi Matsushita
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Tien Thi Thuy Nguyen
- Department of Animal Applied Microbiology, Okayama University Graduate School of Environmental and Life Science, 1-1-1 Tsushima-naka, Kita-ku, Okayama, 700-8530, Japan.,College of Agriculture and Forestry, Hue University, 3 Le Loi, Hue City, Vietnam
| | - Kazuko Koike
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Airi Ikeda
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Shiho Takashima
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Yasushi Yamasaki
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Toshihiro Inokuchi
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Hideaki Kinugasa
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Yusaku Sugihara
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Keita Harada
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Shingo Eikawa
- Department of Immunology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Hidetoshi Morita
- Department of Animal Applied Microbiology, Okayama University Graduate School of Environmental and Life Science, 1-1-1 Tsushima-naka, Kita-ku, Okayama, 700-8530, Japan
| | - Heiichiro Udono
- Department of Immunology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Hiroyuki Okada
- Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
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23
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Radu AG, Torch S, Fauvelle F, Pernet-Gallay K, Lucas A, Blervaque R, Delmas V, Schlattner U, Lafanechère L, Hainaut P, Tricaud N, Pingault V, Bondurand N, Bardeesy N, Larue L, Thibert C, Billaud M. LKB1 specifies neural crest cell fates through pyruvate-alanine cycling. SCIENCE ADVANCES 2019; 5:eaau5106. [PMID: 31328154 PMCID: PMC6636984 DOI: 10.1126/sciadv.aau5106] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 06/10/2019] [Indexed: 05/08/2023]
Abstract
Metabolic processes underlying the development of the neural crest, an embryonic population of multipotent migratory cells, are poorly understood. Here, we report that conditional ablation of the Lkb1 tumor suppressor kinase in mouse neural crest stem cells led to intestinal pseudo-obstruction and hind limb paralysis. This phenotype originated from a postnatal degeneration of the enteric nervous ganglia and from a defective differentiation of Schwann cells. Metabolomic profiling revealed that pyruvate-alanine conversion is enhanced in the absence of Lkb1. Mechanistically, inhibition of alanine transaminases restored glial differentiation in an mTOR-dependent manner, while increased alanine level directly inhibited the glial commitment of neural crest cells. Treatment with the metabolic modulator AICAR suppressed mTOR signaling and prevented Schwann cell and enteric defects of Lkb1 mutant mice. These data uncover a link between pyruvate-alanine cycling and the specification of glial cell fate with potential implications in the understanding of the molecular pathogenesis of neural crest diseases.
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Affiliation(s)
- Anca G. Radu
- Institute for Advanced Biosciences, INSERM U1209, CNRS UMR5309, Université Grenoble Alpes, 38000 Grenoble, France
| | - Sakina Torch
- Institute for Advanced Biosciences, INSERM U1209, CNRS UMR5309, Université Grenoble Alpes, 38000 Grenoble, France
| | - Florence Fauvelle
- Univ. Grenoble Alpes, INSERM, U1216, Grenoble Institute of Neurosciences GIN, 38000 Grenoble, France
- Univ. Grenoble Alpes, INSERM, US17, MRI facility IRMaGe, 38000 Grenoble, France
| | - Karin Pernet-Gallay
- Univ. Grenoble Alpes, INSERM, U1216, Grenoble Institute of Neurosciences GIN, 38000 Grenoble, France
| | - Anthony Lucas
- Institute for Advanced Biosciences, INSERM U1209, CNRS UMR5309, Université Grenoble Alpes, 38000 Grenoble, France
| | - Renaud Blervaque
- Institute for Advanced Biosciences, INSERM U1209, CNRS UMR5309, Université Grenoble Alpes, 38000 Grenoble, France
| | - Véronique Delmas
- Institut Curie, Normal and Pathological Development of Melanocytes, CNRS UMR3347; INSERM U1021; Equipe Labellisée–Ligue Nationale Contre le Cancer, Orsay, France
| | - Uwe Schlattner
- Laboratory of Fundamental and Applied Bioenergetics, Univ Grenoble Alpes, 38185 Grenoble, France
- INSERM U1055, 38041 Grenoble France
| | - Laurence Lafanechère
- Institute for Advanced Biosciences, INSERM U1209, CNRS UMR5309, Université Grenoble Alpes, 38000 Grenoble, France
| | - Pierre Hainaut
- Institute for Advanced Biosciences, INSERM U1209, CNRS UMR5309, Université Grenoble Alpes, 38000 Grenoble, France
| | - Nicolas Tricaud
- INSERM U1051, Institut des Neurosciences de Montpellier (INM), Université de Montpellier, Montpellier, France
| | | | | | - Nabeel Bardeesy
- Cancer Center, Massachusetts General Hospital, 185 Cambridge Street, Boston, MA 02114, USA
- Center for Regenerative Medicine, Massachusetts General Hospital, 185 Cambridge Street, Boston, MA 02114, USA
- Department of Medicine, Harvard Medical School, Boston, MA 02114, USA
| | - Lionel Larue
- Institut Curie, Normal and Pathological Development of Melanocytes, CNRS UMR3347; INSERM U1021; Equipe Labellisée–Ligue Nationale Contre le Cancer, Orsay, France
| | - Chantal Thibert
- Institute for Advanced Biosciences, INSERM U1209, CNRS UMR5309, Université Grenoble Alpes, 38000 Grenoble, France
- Corresponding author. (M.B.); (C.T.)
| | - Marc Billaud
- Institute for Advanced Biosciences, INSERM U1209, CNRS UMR5309, Université Grenoble Alpes, 38000 Grenoble, France
- “Clinical and experimental model of lymphomagenesis” Univ Lyon, Université Claude Bernard Lyon1, INSERM 1052, CNRS 5286, Centre Léon Bérard, Centre de recherche en cancérologie de Lyon, Lyon France
- Corresponding author. (M.B.); (C.T.)
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24
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Hall DT, Griss T, Ma JF, Sanchez BJ, Sadek J, Tremblay AMK, Mubaid S, Omer A, Ford RJ, Bedard N, Pause A, Wing SS, Di Marco S, Steinberg GR, Jones RG, Gallouzi IE. The AMPK agonist 5-aminoimidazole-4-carboxamide ribonucleotide (AICAR), but not metformin, prevents inflammation-associated cachectic muscle wasting. EMBO Mol Med 2019; 10:emmm.201708307. [PMID: 29844217 PMCID: PMC6034131 DOI: 10.15252/emmm.201708307] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Activation of AMPK has been associated with pro-atrophic signaling in muscle. However, AMPK also has anti-inflammatory effects, suggesting that in cachexia, a syndrome of inflammatory-driven muscle wasting, AMPK activation could be beneficial. Here we show that the AMPK agonist AICAR suppresses IFNγ/TNFα-induced atrophy, while the mitochondrial inhibitor metformin does not. IFNγ/TNFα impair mitochondrial oxidative respiration in myotubes and promote a metabolic shift to aerobic glycolysis, similarly to metformin. In contrast, AICAR partially restored metabolic function. The effects of AICAR were prevented by the AMPK inhibitor Compound C and were reproduced with A-769662, a specific AMPK activator. AICAR and A-769662 co-treatment was found to be synergistic, suggesting that the anti-cachectic effects of these drugs are mediated through AMPK activation. AICAR spared muscle mass in mouse models of cancer and LPS induced atrophy. Together, our findings suggest a dual function for AMPK during inflammation-driven atrophy, wherein it can play a protective role when activated exogenously early in disease progression, but may contribute to anabolic suppression and atrophy when activated later through mitochondrial dysfunction and subsequent metabolic stress.
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Affiliation(s)
- Derek T Hall
- Department of Biochemistry, McGill University, Montreal, QC, Canada.,Rosalind and Morris Goodman Cancer Centre, Montreal, QC, Canada
| | - Takla Griss
- Rosalind and Morris Goodman Cancer Centre, Montreal, QC, Canada.,Department of Physiology, McGill University, Montreal, QC, Canada
| | - Jennifer F Ma
- Department of Biochemistry, McGill University, Montreal, QC, Canada.,Rosalind and Morris Goodman Cancer Centre, Montreal, QC, Canada
| | - Brenda Janice Sanchez
- Department of Biochemistry, McGill University, Montreal, QC, Canada.,Rosalind and Morris Goodman Cancer Centre, Montreal, QC, Canada
| | - Jason Sadek
- Department of Biochemistry, McGill University, Montreal, QC, Canada.,Rosalind and Morris Goodman Cancer Centre, Montreal, QC, Canada
| | - Anne Marie K Tremblay
- Department of Biochemistry, McGill University, Montreal, QC, Canada.,Rosalind and Morris Goodman Cancer Centre, Montreal, QC, Canada
| | - Souad Mubaid
- Department of Biochemistry, McGill University, Montreal, QC, Canada.,Rosalind and Morris Goodman Cancer Centre, Montreal, QC, Canada
| | - Amr Omer
- Department of Biochemistry, McGill University, Montreal, QC, Canada.,Rosalind and Morris Goodman Cancer Centre, Montreal, QC, Canada
| | - Rebecca J Ford
- Division of Endocrinology and Metabolism, Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Nathalie Bedard
- Department of Medicine, McGill University and the Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Arnim Pause
- Department of Biochemistry, McGill University, Montreal, QC, Canada.,Rosalind and Morris Goodman Cancer Centre, Montreal, QC, Canada
| | - Simon S Wing
- Department of Medicine, McGill University and the Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Sergio Di Marco
- Department of Biochemistry, McGill University, Montreal, QC, Canada.,Rosalind and Morris Goodman Cancer Centre, Montreal, QC, Canada
| | - Gregory R Steinberg
- Division of Endocrinology and Metabolism, Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Russell G Jones
- Rosalind and Morris Goodman Cancer Centre, Montreal, QC, Canada.,Department of Physiology, McGill University, Montreal, QC, Canada
| | - Imed-Eddine Gallouzi
- Department of Biochemistry, McGill University, Montreal, QC, Canada .,Rosalind and Morris Goodman Cancer Centre, Montreal, QC, Canada.,Life Sciences Division, College of Sciences and Engineering, Hamad Bin Khalifa University (HBKU), Doha, Qatar
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25
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Abstract
The role of the energy sensor AMPK-activated protein kinase (AMPK) in the insulin-secreting β-cell remains unclear and a subject of intense research. With this chapter, we aim to provide a detailed description of the methods that our group routinely applies to the study of AMPK function in mouse and human pancreatic islets. Thus, we provide detailed protocols to isolate and/or culture mouse and human islets, to modulate and measure AMPK activity in isolated islets, and to evaluate its impact on islet function.
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26
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Lv Y, Ming Q, Hao J, Huang Y, Chen H, Wang Q, Yang X, Zhao P. Anti-diabetic activity of canophyllol fromCratoxylum cochinchinense(Lour.) Blume in type 2 diabetic mice by activation of AMP-activated kinase and regulation of PPARγ. Food Funct 2019; 10:964-977. [DOI: 10.1039/c8fo02169d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Our results indicated that CNPL exhibits anti-diabetic effects in KK-Ay miceviaactivating AMP-activated kinase and regulating PPARγ.
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Affiliation(s)
- Yibing Lv
- School of Pharmaceutical Sciences
- South-Central University for Nationalities
- Wuhan 430074
- China
| | - Qian Ming
- School of Life Sciences
- South-Central University for Nationalities
- Wuhan 430074
- China
| | - Ji Hao
- School of Pharmaceutical Sciences
- South-Central University for Nationalities
- Wuhan 430074
- China
| | - Yun Huang
- School of Pharmaceutical Sciences
- South-Central University for Nationalities
- Wuhan 430074
- China
| | - Hao Chen
- School of Pharmaceutical Sciences
- South-Central University for Nationalities
- Wuhan 430074
- China
| | - Qiang Wang
- School of Pharmaceutical Sciences
- South-Central University for Nationalities
- Wuhan 430074
- China
| | - Xinzhou Yang
- School of Pharmaceutical Sciences
- South-Central University for Nationalities
- Wuhan 430074
- China
| | - Ping Zhao
- School of Life Sciences
- South-Central University for Nationalities
- Wuhan 430074
- China
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27
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Oki K, Arias EB, Kanzaki M, Cartee GD. Prior treatment with the AMPK activator AICAR induces subsequently enhanced glucose uptake in isolated skeletal muscles from 24-month-old rats. Appl Physiol Nutr Metab 2018. [PMID: 29518344 DOI: 10.1139/apnm-2017-0858] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
5' AMP-activated protein kinase (AMPK) activation may be part of the exercise-induced process that enhances insulin sensitivity. Independent of exercise, acute prior treatment of skeletal muscles isolated from young rats with a pharmacological AMPK activator, 5-aminoimidazole-4-carboxamide-1-β-d-ribofuranoside (AICAR), causes subsequently improved insulin-stimulated glucose uptake (GU). However, efficacy of a single prior AICAR exposure on insulin-stimulated GU in muscles from old animals has not been studied. The purpose of this study was to determine whether brief, prior exposure to AICAR (3.5 h before GU assessment) leads to subsequently increased GU in insulin-stimulated skeletal muscles from old rats. Epitrochlearis muscles from 24-month-old male rats were isolated and initially incubated ±AICAR (60 min), followed by incubation without AICAR (3 h), then incubation ±insulin (50 min). Muscles were assessed for GU (via 3-O-methyl-[3H]-glucose accumulation) and site-specific phosphorylation of key proteins involved in enhanced GU, including AMPK, Akt, and Akt substrate of 160 kDa (AS160), via Western blotting. Prior ex vivo AICAR treatment resulted in greater GU by insulin-stimulated muscles from 24-month-old rats. Prior AICAR treatment also resulted in greater phosphorylation of AMPK (T172) and AS160 (S588, T642, and S704). Glucose transporter type 4 (GLUT4) protein abundance was unaffected by prior AICAR and/or insulin treatment. These findings demonstrate that skeletal muscles from older rats are susceptible to enhanced insulin-stimulated GU after brief activation of AMPK by prior AICAR. Consistent with earlier research using muscles from young rodents, increased phosphorylation of AS160 is implicated in this effect, which was not attributable to altered GLUT4 glucose transporter protein abundance.
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Affiliation(s)
- Kentaro Oki
- a Muscle Biology Laboratory, School of Kinesiology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Edward B Arias
- a Muscle Biology Laboratory, School of Kinesiology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Makoto Kanzaki
- b Graduate School of Biomedical Engineering, Tohoku University, Sendai, Miyagi, 980-8579, Japan
| | - Gregory D Cartee
- a Muscle Biology Laboratory, School of Kinesiology, University of Michigan, Ann Arbor, MI 48109, USA.,c Department of Molecular and Integrative Physiology and The Institute of Gerontology, University of Michigan, Ann Arbor, MI 48109, USA
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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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Effect of AMPK signal pathway on pathogenesis of abdominal aortic aneurysms. Oncotarget 2017; 8:92827-92840. [PMID: 29190959 PMCID: PMC5696225 DOI: 10.18632/oncotarget.21608] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Accepted: 08/26/2017] [Indexed: 12/13/2022] Open
Abstract
Background and aims Determine the effect of AMPK activation and inhibition on the development of AAA (abdominal aortic aneurysm). Methods AAA was induced in ApoE−/− mice by Ang II (Angiotensin II)-infusion. AICAR (5-aminoimidazole-4-carboxamide-1-β-d-ribofuranoside) was used as AMPK activator and Compound C was used as AMPK inhibitor. We further investigate the effect of metformin, a widely used anti-diabetic drug which could activate AMPK signal pathway, on the pathogenesis of aneurysm. Results Phospho-AMPK level was significantly decreased in AAA tissue compared with control aortas. AICAR significantly reduced the incidence, severity and mortality of aneurysm in the Ang II-infusion model. AICAR also alleviated macrophage infiltration and neovascularity in Ang II infusion model at day 28. The expression of pro-inflammatory factors, angiogenic factors and the activity of MMPs were also alleviated by AICAR during AAA induction. On the other hand, Compound C treatment did not exert obvious protective effect. AMPK activation may inhibit the activation of nuclear factor-κB (NF-κB) and signal transducer and activator of transcription-3 (STAT-3) during AAA induction. Administration of metformin also activated AMPK signal pathway and retarded AAA progression in Ang II infusion model. Conclusions Activation of AMPK signaling pathway may inhibit the Ang II-induced AAA in mice. Metformin may be a promising approach to the treatment of AAA.
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Mesenchymal Stromal Cells Accelerate Epithelial Tight Junction Assembly via the AMP-Activated Protein Kinase Pathway, Independently of Liver Kinase B1. Stem Cells Int 2017; 2017:9717353. [PMID: 28781597 PMCID: PMC5525096 DOI: 10.1155/2017/9717353] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 05/21/2017] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Mesenchymal stromal cells (MSC) are fibroblast-like multipotent cells capable of tissue-repair properties. Given the essentiality of tight junctions (TJ) in epithelial integrity, we hypothesized that MSC modulate TJ formation, via the AMP-activated kinase (AMPK) pathway. Liver kinase-β1 (LKB1) and Ca2+-calmodulin-dependent protein kinase kinase (CaMKK) represent the main kinases that activate AMPK. METHODS The in vitro Ca2+ switch from 5 μM to 1.8 mM was performed using epithelial Madin-Darby canine kidney (MDCK) cells cultured alone or cocultured with rat bone marrow-derived MSC or preexposed to MSC-conditioned medium. TJ assembly was measured by assessing ZO-1 relocation to cell-cell contacts. Experiments were conducted using MDCK stably expressing short-hairpin-RNA (shRNA) against LKB1 or luciferase (LUC, as controls). Compound STO-609 (50 μM) was used as CaMKK inhibitor. RESULTS Following Ca2+ switch, ZO-1 relocation and phosphorylation/activation of AMPK were significantly higher in MDCK/MSC compared to MDCK. No difference in AMPK phosphorylation was observed between LKB1-shRNA and Luc-shRNA MDCK following Ca2+ switch. Conversely, incubation with STO-609 prior to Ca2+ switch prevented AMPK phosphorylation and ZO-1 relocation. MSC-conditioned medium slightly but significantly increased AMPK activation and accelerated TJ-associated distribution of ZO-1 post Ca2+ switch in comparison to regular medium. CONCLUSIONS MSC modulate the assembly of epithelial TJ, via the CaMKK/AMPK pathway independently of LKB1.
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Guigas B, Viollet B. Targeting AMPK: From Ancient Drugs to New Small-Molecule Activators. ACTA ACUST UNITED AC 2017; 107:327-350. [PMID: 27812986 DOI: 10.1007/978-3-319-43589-3_13] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The AMP-activated protein kinase (AMPK) is an evolutionary conserved and ubiquitously expressed serine/threonine kinase mainly acting as a key regulator of cellular energy homeostasis. AMPK is a heterotrimeric protein complex, consisting of a catalytic α subunit and two regulatory β and γ subunits, whose activity is tightly regulated by changes in adenine nucleotides and several posttranslational modifications. Once activated in response to energy deficit, AMPK concomitantly inhibits ATP-consuming anabolic processes and promotes ATP-generating catabolic pathways via direct phosphorylation of multiple downstream effectors, leading to restoration of cellular energy balance. A growing number of energy/nutrient-independent functions of AMPK are also regularly reported, progressively expanding its role to regulation of non-metabolic cellular processes. Historically, AMPK as a therapeutic target has attracted much of interest due to its potential impact on metabolic disorders, such as obesity and type 2 diabetes, but has also recently received considerable renewed attention in the framework of cancer studies, highlighting the persistent need for selective, reversible, potent, and tissue-specific activators. In this chapter, we review the most recent advances in the understanding of the mechanism(s) of action of the current portfolio of AMPK activators, including plant-derived natural compounds and newly discovered small-molecule agonists directly targeting various AMPK subunits.
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Affiliation(s)
- Bruno Guigas
- Department of Molecular Cell Biology, Leiden University Medical Center, Leiden, The Netherlands.
- Department of Parasitology, Leiden University Medical Center, 9600, Postzone L40-Q, 2300 RC, Leiden, The Netherlands.
| | - Benoit Viollet
- INSERM, U1016, Institut Cochin, Paris, France
- CNRS, UMR8104, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, France
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Wei J, Raynor J, Nguyen TLM, Chi H. Nutrient and Metabolic Sensing in T Cell Responses. Front Immunol 2017; 8:247. [PMID: 28337199 PMCID: PMC5343023 DOI: 10.3389/fimmu.2017.00247] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 02/20/2017] [Indexed: 12/13/2022] Open
Abstract
T cells play pivotal roles in shaping host immune responses in infectious diseases, autoimmunity, and cancer. The activation of T cells requires immune and growth factor-derived signals. However, alterations in nutrients and metabolic signals tune T cell responses by impinging upon T cell fates and immune functions. In this review, we summarize how key nutrients, including glucose, amino acids, and lipids, and their sensors and transporters shape T cell responses. We also briefly discuss regulation of T cell responses by oxygen and energy sensing mechanisms.
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Affiliation(s)
- Jun Wei
- Department of Immunology, St. Jude Children's Research Hospital , Memphis, TN , USA
| | - Jana Raynor
- Department of Immunology, St. Jude Children's Research Hospital , Memphis, TN , USA
| | - Thanh-Long M Nguyen
- Department of Immunology, St. Jude Children's Research Hospital , Memphis, TN , USA
| | - Hongbo Chi
- Department of Immunology, St. Jude Children's Research Hospital , Memphis, TN , USA
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Santha S, Davaakhuu G, Basu A, Ke R, Das S, Rana A, Rana B. Modulation of glycogen synthase kinase-3β following TRAIL combinatorial treatment in cancer cells. Oncotarget 2016; 7:66892-66905. [PMID: 27602497 PMCID: PMC5341845 DOI: 10.18632/oncotarget.11834] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 08/29/2016] [Indexed: 12/12/2022] Open
Abstract
Glycogen Synthase Kinase-3β (GSK3β) is a serine/threonine kinase, known to regulate various cellular processes including proliferation, differentiation, survival, apoptosis as well as TRAIL-resistance. Thus pathways that can modulate GSK3β axis are important targets for cancer drug development. Our earlier studies have shown that combinatorial treatment with Troglitazone (TZD) and TRAIL can induce apoptosis in TRAIL-resistant cancer cells. The current studies were undertaken to investigate whether GSK3β pathway was modulated during this apoptosis. Our results indicated an increase in inhibitory GSK3βSer9 phosphorylation during apoptosis, mediated via AKT. At a later time, however, TZD alone and TRAIL-TZD combination produced a dramatic reduction of GSK3β expression, which was abolished by cycloheximide. Luciferase assays with GSK3β-luc promoter reporter showed that TZD can effectively antagonize GSK3β promoter activity. Since TZD is a ligand for transcription factor PPARγ and can activate AMPK, we determined their roles on antagonism of GSK3β. Knockdown of PPARγ was unable to restore GSK3β expression or antagonize GSK3βSer9 phosphorylation. Although pretreatment with Compound C (pharmacological inhibitor of AMPK) partially rescued GSK3β expression, knockdown of AMPKα1 or α2 alone or in combination were ineffective. These studies suggested a novel PPARγ-AMPK-independent mechanism of targeting GSK3β by TZD, elucidation of which might provide newer insights to improve our understanding of TRAIL-resistance.
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Affiliation(s)
- Sreevidya Santha
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Gantulga Davaakhuu
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Aninda Basu
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Rong Ke
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Subhasis Das
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Ajay Rana
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, Chicago, IL 60612, USA.,University of Illinois Hospital and Health Sciences System Cancer Center, University of Illinois at Chicago, Chicago, IL 60612, USA.,Jesse Brown VA Medical Center, Chicago, IL 60612, USA
| | - Basabi Rana
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, Chicago, IL 60612, USA.,University of Illinois Hospital and Health Sciences System Cancer Center, University of Illinois at Chicago, Chicago, IL 60612, USA.,Jesse Brown VA Medical Center, Chicago, IL 60612, USA
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Fang R, Zhu X, Zhu Y, Tong X, Li K, Bai H, Li X, Ben J, Zhang H, Yang Q, Chen Q. Miltefosine Suppresses Hepatic Steatosis by Activating AMPK Signal Pathway. PLoS One 2016; 11:e0163667. [PMID: 27681040 PMCID: PMC5040442 DOI: 10.1371/journal.pone.0163667] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 09/12/2016] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND AND PURPOSE It has been accepted that AMPK (Adenosine monophosphate-activated protein kinase) activation exhibits many beneficial effects on glucolipid metabolism. Lysophosphatidylcholine (LPC) is an important lysophospholipid which can improve blood glucose levels in diabetic mice and attenuate inflammation by activating AMPK signal pathway in macrophages. Synthetic alkylphospholipids (ALPs), such as miltefosine, is used as an alternate of LPC for the clinical application. Here, we investigated whether miltefosine could have an impact on hepatic steatosis and related metabolic disorders. EXPERIMENTAL APPROACH Mice were fed with high fat diet (HFD) for 16 weeks to generate an obese model. Next, the obese mice were randomly divided into three groups: saline-treated and miltefosine-treated (2.5 or 5 mg/kg/d) groups. Miltefosine was intraperitoneally administrated into mice for additional 4 weeks plus HFD treatment. KEY RESULTS It was shown that miltefosine treatment could substantially improve glucose metabolism, prevented hepatic lipid accumulation, and inhibited liver inflammation in HFD-fed mice by activating AMPK signal pathway. In vitro, miltefosine stimulated AMPKα phosphorylation both in time and dose dependent manner and decreased lipid accumulation in liver cells. When a specific AMPK inhibitor compound C was used to treat mice, the antagonistic effects of miltefosine on HFD-induced mouse hyperlipidaemia and liver steatosis were abolished. Treatment with miltefosine also dramatically inhibited the HFD-induced liver inflammation in mice. CONCLUSIONS AND IMPLICATIONS Here we demonstrated that miltefosine might be a new activator of AMPK signal pathway in vivo and in vitro and be useful for treatment of hepatic steatosis and related metabolic disorders.
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Affiliation(s)
- Ru Fang
- Atherosclerosis Research Center, Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing 210029, People’s Republic of China
| | - Xudong Zhu
- Atherosclerosis Research Center, Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing 210029, People’s Republic of China
| | - Yaqin Zhu
- Atherosclerosis Research Center, Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing 210029, People’s Republic of China
| | - Xing Tong
- Atherosclerosis Research Center, Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing 210029, People’s Republic of China
| | - Kexue Li
- Atherosclerosis Research Center, Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing 210029, People’s Republic of China
| | - Hui Bai
- Atherosclerosis Research Center, Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing 210029, People’s Republic of China
| | - Xiaoyu Li
- Atherosclerosis Research Center, Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing 210029, People’s Republic of China
| | - Jingjing Ben
- Atherosclerosis Research Center, Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing 210029, People’s Republic of China
| | - Hanwen Zhang
- Atherosclerosis Research Center, Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing 210029, People’s Republic of China
| | - Qing Yang
- Atherosclerosis Research Center, Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing 210029, People’s Republic of China
| | - Qi Chen
- Atherosclerosis Research Center, Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing 210029, People’s Republic of China
- * E-mail:
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