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Hu YX, Zhang DD, Chen C, Li A, Bai DP. Mechanism of fibroblast growth factor 1 regulating fatty liver disorder in mule ducks. Poult Sci 2024; 103:103818. [PMID: 38733755 PMCID: PMC11101971 DOI: 10.1016/j.psj.2024.103818] [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: 02/23/2024] [Revised: 04/18/2024] [Accepted: 04/26/2024] [Indexed: 05/13/2024] Open
Abstract
Mule ducks tend to accumulate abundant fat in their livers via feeding, which leads to the formation of a fatty liver that is several times larger than a normal liver. However, the mechanism underlying fatty liver formation has not yet been elucidated. Fibroblast growth factor 1 (FGF1), a member of the FGF superfamily, is involved in cellular lipid metabolism and mitosis. This study aims to investigate the regulatory effect of FGF1 on lipid metabolism disorders induced by complex fatty acids in primary mule duck liver cells and elucidate the underlying molecular mechanism. Hepatocytes were induced by adding 1,500:750 µmol/L oleic and palmitic acid concentrations for 36 h, which were stimulated with FGF1 concentrations of 0, 10, 100, and 1000 ng/mL for 12 h. The results showed that FGF1 significantly reduced the hepatic lipid droplet deposition and triglyceride content induced by complex fatty acids; it also reduced oxidative stress; decreased reactive oxygen species fluorescence intensity and malondialdehyde content; upregulated the expression of antioxidant factors nuclear factor erythroid 2 related factor 2 (Nrf2), HO-1, and NQO-1; significantly enhanced liver cell activity; promoted cell cycle progression; inhibited cell apoptosis; upregulated cyclin-dependent kinase 1 (CDK1) and BCL-2 mRNA expression; and downregulated Bax and Caspase-3 expression. In addition, FGF1 promoted AMPK phosphorylation, activated the AMPK pathway, upregulated AMPK gene expression, and downregulated the expression of SREBP1 and ACC1 genes, thereby alleviating excessive fat accumulation in liver cells induced by complex fatty acids. In summary, FGF1 may alleviate lipid metabolism disorders induced by complex fatty acids in primary mule duck liver cells by activating the AMPK signaling pathway.
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Affiliation(s)
- Ying-Xiu Hu
- Fujian Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health, College of Animal Sciences, Fujian Agricultural and Forestry University, Fuzhou 350002, China
| | - Ding-Ding Zhang
- Fujian Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health, College of Animal Sciences, Fujian Agricultural and Forestry University, Fuzhou 350002, China
| | - Chao Chen
- Fujian Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health, College of Animal Sciences, Fujian Agricultural and Forestry University, Fuzhou 350002, China
| | - Ang Li
- Fujian Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health, College of Animal Sciences, Fujian Agricultural and Forestry University, Fuzhou 350002, China
| | - Ding-Ping Bai
- Fujian Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health, College of Animal Sciences, Fujian Agricultural and Forestry University, Fuzhou 350002, China.
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2
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Dvorácskó S, Herrerias A, Oliverio A, Bhattacharjee P, Pommerolle L, Liu Z, Feng D, Lee YS, Hassan SA, Godlewski G, Cinar R, Iyer MR. Cannabinoformins: Designing Biguanide-Embedded, Orally Available, Peripherally Selective Cannabinoid-1 Receptor Antagonists for Metabolic Syndrome Disorders. J Med Chem 2023; 66:11985-12004. [PMID: 37611316 DOI: 10.1021/acs.jmedchem.3c00599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/25/2023]
Abstract
We have designed orally bioavailable, non-brain-penetrant antagonists of the cannabinoid-1 receptor (CB1R) with a built-in biguanide sensor to mimic 5'-adenosine monophosphate kinase (AMPK) activation for treating obesity-associated co-morbidities. A series of 3,4-diarylpyrazolines bearing rational pharmacophoric pendants designed to limit brain penetration were synthesized and evaluated in CB1R ligand binding assays and recombinant AMPK assays. The compounds displayed high CB1R binding affinity and potent CB1R antagonist activities and acted as AMPK activators. Select compounds showed good oral exposure, with compounds 36, 38-S, and 39-S showing <5% brain penetrance, attesting to peripheral restriction. In vivo studies of 38-S revealed decreased food intake and body weight reduction in diet-induced obese mice as well as oral in vivo efficacy of 38-S in ameliorating glucose tolerance and insulin resistance. The designed "cannabinoformin" four-arm CB1R antagonists could serve as potential leads for treatment of metabolic syndrome disorders with negligible neuropsychiatric side effects.
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Affiliation(s)
- Szabolcs Dvorácskó
- Section on Medicinal Chemistry, National Institute on Alcohol Abuse and Alcoholism (NIAAA), National Institutes of Health (NIH), 5625 Fishers Lane, Rockville, Maryland 20852, United States
- Section on Fibrotic Disorders, National Institute on Alcohol Abuse and Alcoholism (NIAAA), National Institutes of Health (NIH), 5625 Fishers Lane, Rockville, Maryland 20852, United States
| | - Alexa Herrerias
- Laboratory of Physiologic Studies, National Institute on Alcohol Abuse and Alcoholism (NIAAA), National Institutes of Health (NIH), 5625 Fishers Lane, Rockville, Maryland 20852, United States
| | - Anna Oliverio
- Laboratory of Physiologic Studies, National Institute on Alcohol Abuse and Alcoholism (NIAAA), National Institutes of Health (NIH), 5625 Fishers Lane, Rockville, Maryland 20852, United States
| | - Pinaki Bhattacharjee
- Section on Medicinal Chemistry, National Institute on Alcohol Abuse and Alcoholism (NIAAA), National Institutes of Health (NIH), 5625 Fishers Lane, Rockville, Maryland 20852, United States
| | - Lenny Pommerolle
- Section on Fibrotic Disorders, National Institute on Alcohol Abuse and Alcoholism (NIAAA), National Institutes of Health (NIH), 5625 Fishers Lane, Rockville, Maryland 20852, United States
| | - Ziyi Liu
- Section on Fibrotic Disorders, National Institute on Alcohol Abuse and Alcoholism (NIAAA), National Institutes of Health (NIH), 5625 Fishers Lane, Rockville, Maryland 20852, United States
- Laboratory of Physiologic Studies, National Institute on Alcohol Abuse and Alcoholism (NIAAA), National Institutes of Health (NIH), 5625 Fishers Lane, Rockville, Maryland 20852, United States
| | - Dechun Feng
- Laboratory of Liver Diseases, NIAAA, NIH, 5625 Fishers Lane, Rockville, Maryland 20852, United States
| | - Yong-Sok Lee
- Bioinformatics and Computational Biosciences Branch, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, Maryland 20892, United States
| | - Sergio A Hassan
- Bioinformatics and Computational Biosciences Branch, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, Maryland 20892, United States
| | - Grzegorz Godlewski
- Laboratory of Physiologic Studies, National Institute on Alcohol Abuse and Alcoholism (NIAAA), National Institutes of Health (NIH), 5625 Fishers Lane, Rockville, Maryland 20852, United States
| | - Resat Cinar
- Section on Fibrotic Disorders, National Institute on Alcohol Abuse and Alcoholism (NIAAA), National Institutes of Health (NIH), 5625 Fishers Lane, Rockville, Maryland 20852, United States
| | - Malliga R Iyer
- Section on Medicinal Chemistry, National Institute on Alcohol Abuse and Alcoholism (NIAAA), National Institutes of Health (NIH), 5625 Fishers Lane, Rockville, Maryland 20852, United States
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Singh S, De Carlo F, Ibrahim MA, Penfornis P, Mouton AJ, Tripathi SK, Agarwal AK, Eastham L, Pasco DS, Balachandran P, Claudio PP. The Oligostilbene Gnetin H Is a Novel Glycolysis Inhibitor That Regulates Thioredoxin Interacting Protein Expression and Synergizes with OXPHOS Inhibitor in Cancer Cells. Int J Mol Sci 2023; 24:ijms24097741. [PMID: 37175448 PMCID: PMC10178141 DOI: 10.3390/ijms24097741] [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: 02/14/2023] [Revised: 04/12/2023] [Accepted: 04/18/2023] [Indexed: 05/15/2023] Open
Abstract
Since aerobic glycolysis was first observed in tumors almost a century ago by Otto Warburg, the field of cancer cell metabolism has sparked the interest of scientists around the world as it might offer new avenues of treatment for malignant cells. Our current study claims the discovery of gnetin H (GH) as a novel glycolysis inhibitor that can decrease metabolic activity and lactic acid synthesis and displays a strong cytostatic effect in melanoma and glioblastoma cells. Compared to most of the other glycolysis inhibitors used in combination with the complex-1 mitochondrial inhibitor phenformin (Phen), GH more potently inhibited cell growth. RNA-Seq with the T98G glioblastoma cell line treated with GH showed more than an 80-fold reduction in thioredoxin interacting protein (TXNIP) expression, indicating that GH has a direct effect on regulating a key gene involved in the homeostasis of cellular glucose. GH in combination with phenformin also substantially enhances the levels of p-AMPK, a marker of metabolic catastrophe. These findings suggest that the concurrent use of the glycolytic inhibitor GH with a complex-1 mitochondrial inhibitor could be used as a powerful tool for inducing metabolic catastrophe in cancer cells and reducing their growth.
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Affiliation(s)
- Shivendra Singh
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Flavia De Carlo
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Mohamed A Ibrahim
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Patrice Penfornis
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
- Cancer Center & Research Institute, Department of Pharmacology & Toxicology, School of Medicine, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - Alan J Mouton
- Department of Physiology, School of Medicine, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - Siddharth K Tripathi
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Ameeta K Agarwal
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Linda Eastham
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - David S Pasco
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Premalatha Balachandran
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Pier Paolo Claudio
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
- Cancer Center & Research Institute, Department of Pharmacology & Toxicology, School of Medicine, University of Mississippi Medical Center, Jackson, MS 39216, USA
- Department of Biomolecular Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
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4
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Molecular mechanisms of exercise contributing to tissue regeneration. Signal Transduct Target Ther 2022; 7:383. [PMID: 36446784 PMCID: PMC9709153 DOI: 10.1038/s41392-022-01233-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 10/03/2022] [Accepted: 10/17/2022] [Indexed: 12/03/2022] Open
Abstract
Physical activity has been known as an essential element to promote human health for centuries. Thus, exercise intervention is encouraged to battle against sedentary lifestyle. Recent rapid advances in molecular biotechnology have demonstrated that both endurance and resistance exercise training, two traditional types of exercise, trigger a series of physiological responses, unraveling the mechanisms of exercise regulating on the human body. Therefore, exercise has been expected as a candidate approach of alleviating a wide range of diseases, such as metabolic diseases, neurodegenerative disorders, tumors, and cardiovascular diseases. In particular, the capacity of exercise to promote tissue regeneration has attracted the attention of many researchers in recent decades. Since most adult human organs have a weak regenerative capacity, it is currently a key challenge in regenerative medicine to improve the efficiency of tissue regeneration. As research progresses, exercise-induced tissue regeneration seems to provide a novel approach for fighting against injury or senescence, establishing strong theoretical basis for more and more "exercise mimetics." These drugs are acting as the pharmaceutical alternatives of those individuals who cannot experience the benefits of exercise. Here, we comprehensively provide a description of the benefits of exercise on tissue regeneration in diverse organs, mainly focusing on musculoskeletal system, cardiovascular system, and nervous system. We also discuss the underlying molecular mechanisms associated with the regenerative effects of exercise and emerging therapeutic exercise mimetics for regeneration, as well as the associated opportunities and challenges. We aim to describe an integrated perspective on the current advances of distinct physiological mechanisms associated with exercise-induced tissue regeneration on various organs and facilitate the development of drugs that mimics the benefits of exercise.
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5
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Edwards-Hicks J, Su H, Mangolini M, Yoneten KK, Wills J, Rodriguez-Blanco G, Young C, Cho K, Barker H, Muir M, Guerrieri AN, Li XF, White R, Manasterski P, Mandrou E, Wills K, Chen J, Abraham E, Sateri K, Qian BZ, Bankhead P, Arends M, Gammoh N, von Kriegsheim A, Patti GJ, Sims AH, Acosta JC, Brunton V, Kranc KR, Christophorou M, Pearce EL, Ringshausen I, Finch AJ. MYC sensitises cells to apoptosis by driving energetic demand. Nat Commun 2022; 13:4674. [PMID: 35945217 PMCID: PMC9363429 DOI: 10.1038/s41467-022-32368-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 07/27/2022] [Indexed: 12/27/2022] Open
Abstract
The MYC oncogene is a potent driver of growth and proliferation but also sensitises cells to apoptosis, which limits its oncogenic potential. MYC induces several biosynthetic programmes and primary cells overexpressing MYC are highly sensitive to glutamine withdrawal suggesting that MYC-induced sensitisation to apoptosis may be due to imbalance of metabolic/energetic supply and demand. Here we show that MYC elevates global transcription and translation, even in the absence of glutamine, revealing metabolic demand without corresponding supply. Glutamine withdrawal from MRC-5 fibroblasts depletes key tricarboxylic acid (TCA) cycle metabolites and, in combination with MYC activation, leads to AMP accumulation and nucleotide catabolism indicative of energetic stress. Further analyses reveal that glutamine supports viability through TCA cycle energetics rather than asparagine biosynthesis and that TCA cycle inhibition confers tumour suppression on MYC-driven lymphoma in vivo. In summary, glutamine supports the viability of MYC-overexpressing cells through an energetic rather than a biosynthetic mechanism.
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Affiliation(s)
- Joy Edwards-Hicks
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XR, UK
- Department of Immunometabolism, Max Planck Institute of Immunobiology and Epigenetics, Stübeweg 51, D-79108, Freiburg, Germany
| | - Huizhong Su
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XR, UK
| | - Maurizio Mangolini
- Wellcome Trust/MRC Cambridge Stem Cell Institute & Department of Haematology, University of Cambridge, Cambridge, CB2 0AH, UK
| | - Kubra K Yoneten
- Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, London, EC1M 6BQ, UK
| | - Jimi Wills
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XR, UK
| | - Giovanny Rodriguez-Blanco
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XR, UK
| | - Christine Young
- MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XR, UK
| | - Kevin Cho
- Department of Chemistry and Medicine, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Heather Barker
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XR, UK
| | - Morwenna Muir
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XR, UK
| | - Ania Naila Guerrieri
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XR, UK
| | - Xue-Feng Li
- MRC University of Edinburgh Centre for Reproductive Health, University of Edinburgh, Edinburgh, EH16 4TJ, UK
| | - Rachel White
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XR, UK
| | - Piotr Manasterski
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XR, UK
| | - Elena Mandrou
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XR, UK
| | - Karen Wills
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XR, UK
| | - Jingyu Chen
- Wellcome Trust/MRC Cambridge Stem Cell Institute & Department of Haematology, University of Cambridge, Cambridge, CB2 0AH, UK
| | - Emily Abraham
- Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, London, EC1M 6BQ, UK
| | - Kianoosh Sateri
- Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, London, EC1M 6BQ, UK
| | - Bin-Zhi Qian
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XR, UK
- MRC University of Edinburgh Centre for Reproductive Health, University of Edinburgh, Edinburgh, EH16 4TJ, UK
| | - Peter Bankhead
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XR, UK
| | - Mark Arends
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XR, UK
| | - Noor Gammoh
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XR, UK
| | - Alex von Kriegsheim
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XR, UK
| | - Gary J Patti
- Department of Chemistry and Medicine, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Andrew H Sims
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XR, UK
| | - Juan Carlos Acosta
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XR, UK
- Instituto de Biomedicina y Biotecnología de Cantabria, IBBTEC (CSIC, Universidad de Cantabria). C/ Albert Einstein 22, Santander, 39011, Spain
| | - Valerie Brunton
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XR, UK
| | - Kamil R Kranc
- Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, London, EC1M 6BQ, UK
- MRC Center for Regenerative Medicine, University of Edinburgh, Edinburgh, EH8 9YL, UK
| | - Maria Christophorou
- Wellcome Trust/MRC Cambridge Stem Cell Institute & Department of Haematology, University of Cambridge, Cambridge, CB2 0AH, UK
| | - Erika L Pearce
- Department of Immunometabolism, Max Planck Institute of Immunobiology and Epigenetics, Stübeweg 51, D-79108, Freiburg, Germany
- Department of Oncology, The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University, Baltimore, MD, USA
| | - Ingo Ringshausen
- Wellcome Trust/MRC Cambridge Stem Cell Institute & Department of Haematology, University of Cambridge, Cambridge, CB2 0AH, UK
| | - Andrew J Finch
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XR, UK.
- Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, London, EC1M 6BQ, UK.
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Bhattacharya S, Yin J, Yang C, Wang Y, Sims M, Pfeffer LM, Chaum E. STAT3 suppresses the AMPKα/ULK1-dependent induction of autophagy in glioblastoma cells. J Cell Mol Med 2022; 26:3873-3890. [PMID: 35670018 PMCID: PMC9279602 DOI: 10.1111/jcmm.17421] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 05/10/2022] [Accepted: 05/19/2022] [Indexed: 11/28/2022] Open
Abstract
Despite advances in molecular characterization, glioblastoma (GBM) remains the most common and lethal brain tumour with high mortality rates in both paediatric and adult patients. The signal transducer and activator of transcription 3 (STAT3) is an important oncogenic driver of GBM. Although STAT3 reportedly plays a role in autophagy of some cells, its role in cancer cell autophagy remains unclear. In this study, we found Serine-727 and Tyrosine-705 phosphorylation of STAT3 was constitutive in GBM cell lines. Tyrosine phosphorylation of STAT3 in GBM cells suppresses autophagy, whereas knockout (KO) of STAT3 increases ULK1 gene expression, increases TSC2-AMPKα-ULK1 signalling, and increases lysosomal Cathepsin D processing, leading to the stimulation of autophagy. Rescue of STAT3-KO cells by the enforced expression of wild-type (WT) STAT3 reverses these pathways and inhibits autophagy. Conversely, expression of Y705F- and S727A-STAT3 phosphorylation deficient mutants in STAT3-KO cells did not suppress autophagy. Inhibition of ULK1 activity (by treatment with MRT68921) or its expression (by siRNA knockdown) in STAT3-KO cells inhibits autophagy and sensitizes cells to apoptosis. Taken together, our findings suggest that serine and tyrosine phosphorylation of STAT3 play critical roles in STAT3-dependent autophagy in GBM, and thus are potential targets to treat GBM.
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Affiliation(s)
- Sujoy Bhattacharya
- Department of Ophthalmology and Visual Sciences, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Jinggang Yin
- Department of Ophthalmology and Visual Sciences, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Chuanhe Yang
- Department of Pathology and Laboratory Medicine, The Center for Cancer Research, College of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Yinan Wang
- Department of Pathology and Laboratory Medicine, The Center for Cancer Research, College of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Michelle Sims
- Department of Pathology and Laboratory Medicine, The Center for Cancer Research, College of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Lawrence M Pfeffer
- Department of Pathology and Laboratory Medicine, The Center for Cancer Research, College of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Edward Chaum
- Department of Ophthalmology and Visual Sciences, Vanderbilt University Medical Center, Nashville, Tennessee, USA
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7
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Drewe J, Boonen G, Culmsee C. Treat more than heat-New therapeutic implications of Cimicifuga racemosa through AMPK-dependent metabolic effects. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2022; 100:154060. [PMID: 35338990 DOI: 10.1016/j.phymed.2022.154060] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 02/18/2022] [Accepted: 03/14/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Cimicifuga racemosa extracts (CRE) have obtained a "well-established use status" in the treatment of postmenopausal (i.e., climacteric) complaints, which predominantly include vasomotor symptoms such as hot flushes and sweating, as well as nervousness, irritability, and metabolic changes. Although characteristic postmenopausal complaints are known for a very long time and the beneficial effects of CRE on climacteric symptoms are well accepted, both the pathophysiology of postmenopausal symptoms and the mechanism of action of CREs are not yet fully understood. In particular, current hypotheses suggest that changes in the α-adrenergic and serotonergic signaling pathways secondary to estrogen depletion are responsible for the development of hot flushes. PURPOSE Some of the symptoms associated with menopause cannot be explained by these hypotheses. Therefore, we attempted to extend our classic understanding of menopause by integrating of partly age-related metabolic impairments. METHODS A comprehensive literature survey was performed using the PubMed database for articles published through September 2021. The following search terms were used: (cimicifuga OR AMPK) AND (hot flush* OR hot flash* OR menopaus* OR osteoporos* OR cancer OR antioxida* OR cardiovasc*). No limits were set with respect to language, and the references cited in the articles retrieved were used to identify additional publications. RESULTS We found that menopause is a manifestation of the general aging process, with specific metabolic changes that aggravate menopausal symptoms, which are accelerated by estrogen depletion and associated neurotransmitter dysregulation. Cimicifuga extracts with their metabolic effects mitigate climacteric symptoms but may also modulate the aging process itself. Central to these effects are effects of CRE on the metabolic key regulator, the AMP-activated protein kinase (AMPK). CONCLUSIONS As an extension of this effect dimension, other off-label indications may appear attractive in the sense of repurposing of this herbal treatment.
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Affiliation(s)
- Jürgen Drewe
- Medical Department, Max Zeller Soehne AG, CH-8590 Romanshorn, Switzerland.
| | - Georg Boonen
- Medical Department, Max Zeller Soehne AG, CH-8590 Romanshorn, Switzerland
| | - Carsten Culmsee
- Institute of Pharmacology and Clinical Pharmacy, University of Marburg, D-35043 Marburg, Germany; Center for Mind, Brain and Behavior, D-35032 Marburg, Germany
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8
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A suite of in vitro and in vivo assays for monitoring the activity of the pseudokinase Bud32. Methods Enzymol 2022; 667:729-773. [PMID: 35525560 DOI: 10.1016/bs.mie.2022.03.052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Bud32 is a member of the protein kinase superfamily that is invariably conserved in all eukaryotic and archaeal organisms. In both of these kingdoms, Bud32 forms part of the KEOPS (Kinase, Endopeptidase and Other Proteins of Small size) complex together with the three other core subunits Kae1, Cgi121 and Pcc1. KEOPS functions to generate the universal and essential tRNA post-transcriptional modification N6-theronylcarbamoyl adenosine (t6A), which is present at position A37 in all tRNAs that bind to codons with an A in the first position (ANN decoding tRNAs) and is essential for the fidelity of translation. Mutations in KEOPS genes in humans underlie the severe genetic disease Galloway-Mowat syndrome, which results in childhood death. KEOPS activity depends on two major functions of Bud32. Firstly, Bud32 facilitates efficient tRNA substrate recruitment to KEOPS and helps in positioning the A37 site of the tRNA in the active site of Kae1, which carries out the t6A modification reaction. Secondly, the enzymatic activity of Bud32 is required for the ability of KEOPS to modify tRNA. Unlike conventional protein kinases, which employ their enzymatic activity for phosphorylation of protein substrates, Bud32 employs its enzymatic activity to function as an ATPase. Herein, we present a comprehensive suite of assays to monitor the activity of Bud32 in KEOPS in vitro and in vivo. We present protocols for the purification of the archaeal KEOPS proteins and of a tRNA substrate, as well as protocols for monitoring the ATPase activity of Bud32 and for analyzing its role in tRNA binding. We further present a complementary protocol for monitoring the role Bud32 has in cell growth in yeast.
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9
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Chemotherapy Resistance: Role of Mitochondrial and Autophagic Components. Cancers (Basel) 2022; 14:cancers14061462. [PMID: 35326612 PMCID: PMC8945922 DOI: 10.3390/cancers14061462] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 03/10/2022] [Accepted: 03/10/2022] [Indexed: 11/16/2022] Open
Abstract
Simple Summary Chemotherapy resistance is a common occurrence during cancer treatment that cancer researchers are attempting to understand and overcome. Mitochondria are a crucial intracellular signaling core that are becoming important determinants of numerous aspects of cancer genesis and progression, such as metabolic reprogramming, metastatic capability, and chemotherapeutic resistance. Mitophagy, or selective autophagy of mitochondria, can influence both the efficacy of tumor chemotherapy and the degree of drug resistance. Regardless of the fact that mitochondria are well-known for coordinating ATP synthesis from cellular respiration in cellular bioenergetics, little is known its mitophagy regulation in chemoresistance. Recent advancements in mitochondrial research, mitophagy regulatory mechanisms, and their implications for our understanding of chemotherapy resistance are discussed in this review. Abstract Cancer chemotherapy resistance is one of the most critical obstacles in cancer therapy. One of the well-known mechanisms of chemotherapy resistance is the change in the mitochondrial death pathways which occur when cells are under stressful situations, such as chemotherapy. Mitophagy, or mitochondrial selective autophagy, is critical for cell quality control because it can efficiently break down, remove, and recycle defective or damaged mitochondria. As cancer cells use mitophagy to rapidly sweep away damaged mitochondria in order to mediate their own drug resistance, it influences the efficacy of tumor chemotherapy as well as the degree of drug resistance. Yet despite the importance of mitochondria and mitophagy in chemotherapy resistance, little is known about the precise mechanisms involved. As a consequence, identifying potential therapeutic targets by analyzing the signal pathways that govern mitophagy has become a vital research goal. In this paper, we review recent advances in mitochondrial research, mitophagy control mechanisms, and their implications for our understanding of chemotherapy resistance.
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10
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Peeples ES, Sahar NE, Snyder W, Mirnics K. Early Brain microRNA/mRNA Expression is Region-Specific After Neonatal Hypoxic-Ischemic Injury in a Mouse Model. Front Genet 2022; 13:841043. [PMID: 35251138 PMCID: PMC8890746 DOI: 10.3389/fgene.2022.841043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 01/25/2022] [Indexed: 11/13/2022] Open
Abstract
Background: MicroRNAs (miRNAs) may be promising therapeutic targets for neonatal hypoxic-ischemic brain injury (HIBI) but targeting miRNA-based therapy will require more precise understanding of endogenous brain miRNA expression. Methods: Postnatal day 9 mouse pups underwent HIBI by unilateral carotid ligation + hypoxia or sham surgery. Next-generation miRNA sequencing and mRNA Neuroinflammation panels were performed on ipsilateral cortex, striatum/thalamus, and cerebellum of each group at 30 min after injury. Targeted canonical pathways were predicted by KEGG analysis. Results: Sixty-one unique miRNAs showed differential expression (DE) in at least one region; nine in more than one region, including miR-410-5p, -1264-3p, 1298-5p, -5,126, and -34b-3p. Forty-four mRNAs showed DE in at least one region; 16 in more than one region. MiRNAs showing DE primarily targeted metabolic pathways, while mRNAs targeted inflammatory and cell death pathways. Minimal miRNA-mRNA interactions were seen at 30 min after HIBI. Conclusion: This study identified miRNAs that deserve future study to assess their potential as therapeutic targets in neonatal HIBI. Additionally, the differences in miRNA expression between regions suggest that future studies assessing brain miRNA expression to guide therapy development should consider evaluating individual brain regions rather than whole brain to ensure the sensitivity needed for the development of targeted therapies.
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Affiliation(s)
- Eric S. Peeples
- Department of Pediatrics, University of Nebraska Medical Center, Omaha, NE, United States
- Department of Pediatrics, Children’s Hospital & Medical Center, Omaha, NE, United States
- Child Health Research Institute, Omaha, NE, United States
| | - Namood-e Sahar
- Department of Pediatrics, University of Nebraska Medical Center, Omaha, NE, United States
- Child Health Research Institute, Omaha, NE, United States
| | - William Snyder
- Department of Pediatrics, University of Nebraska Medical Center, Omaha, NE, United States
- Child Health Research Institute, Omaha, NE, United States
| | - Karoly Mirnics
- Child Health Research Institute, Omaha, NE, United States
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, United States
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, United States
- Munroe-Meyer Institute for Genetics and Rehabilitation, University of Nebraska Medical Center, Omaha, NE, United States
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11
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Pfeiffer S, Tomašcová A, Mamrak U, Haunsberger SJ, Connolly NMC, Resler A, Düssmann H, Weisová P, Jirström E, D'Orsi B, Chen G, Cremona M, Hennessy BT, Plesnila N, Prehn JHM. AMPK-regulated miRNA-210-3p is activated during ischaemic neuronal injury and modulates PI3K-p70S6K signalling. J Neurochem 2021; 159:710-728. [PMID: 33694332 DOI: 10.1111/jnc.15347] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 02/12/2021] [Accepted: 03/05/2021] [Indexed: 12/14/2022]
Abstract
Progressive neuronal injury following ischaemic stroke is associated with glutamate-induced depolarization, energetic stress and activation of AMP-activated protein kinase (AMPK). We here identify a molecular signature associated with neuronal AMPK activation, as a critical regulator of cellular response to energetic stress following ischaemia. We report a robust induction of microRNA miR-210-3p both in vitro in primary cortical neurons in response to acute AMPK activation and following ischaemic stroke in vivo. Bioinformatics and reverse phase protein array analysis of neuronal protein expression changes in vivo following administration of a miR-210-3p mimic revealed altered expression of phosphatase and tensin homolog (PTEN), 3-phosphoinositide-dependent protein kinase 1 (PDK1), ribosomal protein S6 kinase (p70S6K) and ribosomal protein S6 (RPS6) signalling in response to increasing miR-210-3p. In vivo, we observed a corresponding reduction in p70S6K activity following ischaemic stroke. Utilizing models of glutamate receptor over-activation in primary neurons, we demonstrated that induction of miR-210-3p was accompanied by sustained suppression of p70S6K activity and that this effect was reversed by miR-210-3p inhibition. Collectively, these results provide new molecular insight into the regulation of cell signalling during ischaemic injury, and suggest a novel mechanism whereby AMPK regulates miR-210-3p to control p70S6K activity in ischaemic stroke and excitotoxic injury.
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Affiliation(s)
- Shona Pfeiffer
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
- Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Anna Tomašcová
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
- Biomedical Centre Martin, Comenius University in Bratislava, Bratislava, Slovakia
| | - Uta Mamrak
- Institute for Stroke and Dementia Research (ISD), Munich, Germany
| | - Stefan J Haunsberger
- Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Niamh M C Connolly
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
- Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Alexa Resler
- Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Heiko Düssmann
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
- Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Petronela Weisová
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Elisabeth Jirström
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
- Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
- FutureNeuro SFI Research Center, Royal College of Surgeons Ireland, Dublin, Ireland
| | - Beatrice D'Orsi
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
- Institute of Neuroscience, Italian National Research Council (CNR), Pisa, Italy
| | - Gang Chen
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Mattia Cremona
- Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
- Dept of Molecular Medicine (Medical Oncology group), Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Bryan T Hennessy
- Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
- Dept of Molecular Medicine (Medical Oncology group), Royal College of Surgeons in Ireland, Dublin, Ireland
- Department of Medical Oncology, Beaumont Hospital, Dublin, Ireland
| | - Nikolaus Plesnila
- Institute for Stroke and Dementia Research (ISD), Munich, Germany
- Munich Cluster of Systems Neurology (Synergy), Munich, Germany
| | - Jochen H M Prehn
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
- Centre for Systems Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
- FutureNeuro SFI Research Center, Royal College of Surgeons Ireland, Dublin, Ireland
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12
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Muraleedharan R, Dasgupta B. AMPK in the brain: its roles in glucose and neural metabolism. FEBS J 2021; 289:2247-2262. [PMID: 34355526 DOI: 10.1111/febs.16151] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 07/22/2021] [Accepted: 08/04/2021] [Indexed: 11/28/2022]
Abstract
The adenosine monophosphate-activated protein kinase (AMPK) is an integrative metabolic sensor that maintains energy balance at the cellular level and plays an important role in orchestrating intertissue metabolic signaling. AMPK regulates cell survival, metabolism, and cellular homeostasis basally as well as in response to various metabolic stresses. Studies so far show that the AMPK pathway is associated with neurodegeneration and CNS pathology, but the mechanisms involved remain unclear. AMPK dysregulation has been reported in neurodegenerative diseases such as amyotrophic lateral sclerosis, multiple sclerosis, Alzheimer's disease, Parkinson's disease, Huntington's disease, and other neuropathies. AMPK activation appears to be both neuroprotective and pro-apoptotic, possibly dependent upon neural cell types, the nature of insults, and the intensity and duration of AMPK activation. While embryonic brain development in AMPK null mice appears to proceed normally without any overt structural abnormalities, our recent study confirmed the full impact of AMPK loss in the postnatal and aging brain. Our studies revealed that Ampk deletion in neurons increased basal neuronal excitability and reduced latency to seizure upon stimulation. Three major pathways, glycolysis, pentose phosphate shunt, and glycogen turnover, contribute to utilization of glucose in the brain. AMPK's regulation of aerobic glycolysis in astrocytic metabolism warrants further deliberation, particularly glycogen turnover and shuttling of glucose- and glycogen-derived lactate from astrocytes to neurons during activation. In this minireview, we focus on recent advances in AMPK and energy-sensing in the brain.
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Affiliation(s)
| | - Biplab Dasgupta
- Division of Oncology, Cincinnati Children's Hospital Medical Center, OH, USA
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Nascimento Mello AL, Sagrillo FS, de Souza AG, Costa ARP, Campos VR, Cunha AC, Imbroisi Filho R, da Costa Santos Boechat F, Sola-Penna M, de Souza MCBV, Zancan P. Selective AMPK activator leads to unfolded protein response downregulation and induces breast cancer cell death and autophagy. Life Sci 2021; 276:119470. [PMID: 33831423 DOI: 10.1016/j.lfs.2021.119470] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 03/18/2021] [Accepted: 03/25/2021] [Indexed: 12/25/2022]
Abstract
AIMS AMPK plays a critical role regulating cell metabolism, growth and survival. Interfering with this enzyme activity has been extensively studied as putative mechanism for cancer therapy. The present work aims to identify a specific AMPK activator for cancer cells among a series of novel heterocyclic compounds. MATERIALS AND METHODS A series of novel hybrid heterocyclic compounds, namely naphtoquinone-4-oxoquinoline and isoquinoline-5,8-quinone-4-oxoquinoline derivatives, were synthesized via Michael reaction and their structures confirmed by spectral data: infrared; 1H and 13C NMR spectroscopy (COSY, HSQC, HMBC); and high-resolution mass spectrometry (HRMS). The novel compounds were screened and tested for antitumoral activity and have part of their mechanism of action scrutinized. KEY FINDINGS Here, we identified a selective AMPK activator among the new hybrid heterocyclic compounds. This new compound presents selective cytotoxicity on breast cancer cells but not on non-cancer counterparts. We identified that by specifically activating AMPK in cancer cells, the drug downregulates unfolded protein response pathway, as well as inhibits mTOR signaling. SIGNIFICANCE These effects, that are selective for cancer cells, lead to activation of autophagy and, ultimately, to cancer cells death. Taken together, our data support the promising anticancer activity of this novel compound which is a strong modulator of metabolism.
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Affiliation(s)
- Angélica Lauria Nascimento Mello
- Laboratório de Oncobiologia Molecular (LabOMol), Departamento de Biotecnologia Farmacêutica, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil
| | - Fernanda Savacini Sagrillo
- Programa de Pós-Graduação em Química, Instituto de Química, Universidade Federal Fluminense, 24010-141, Outeiro de São João Batista, s/n, Niterói, Rio de Janeiro, Brazil
| | - Alan Gonçalves de Souza
- Programa de Pós-Graduação em Química, Instituto de Química, Universidade Federal Fluminense, 24010-141, Outeiro de São João Batista, s/n, Niterói, Rio de Janeiro, Brazil
| | - Amanda Rodrigues Pinto Costa
- Programa de Pós-Graduação em Química, Instituto de Química, Universidade Federal Fluminense, 24010-141, Outeiro de São João Batista, s/n, Niterói, Rio de Janeiro, Brazil
| | - Vinícius Rangel Campos
- Programa de Pós-Graduação em Química, Instituto de Química, Universidade Federal Fluminense, 24010-141, Outeiro de São João Batista, s/n, Niterói, Rio de Janeiro, Brazil
| | - Anna Claudia Cunha
- Programa de Pós-Graduação em Química, Instituto de Química, Universidade Federal Fluminense, 24010-141, Outeiro de São João Batista, s/n, Niterói, Rio de Janeiro, Brazil
| | - Ricardo Imbroisi Filho
- Laboratório de Oncobiologia Molecular (LabOMol), Departamento de Biotecnologia Farmacêutica, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil
| | - Fernanda da Costa Santos Boechat
- Programa de Pós-Graduação em Química, Instituto de Química, Universidade Federal Fluminense, 24010-141, Outeiro de São João Batista, s/n, Niterói, Rio de Janeiro, Brazil
| | - Mauro Sola-Penna
- Laboratório de Enzimologia e Controle do Metabolismo (LabECoM), Departamento de Biotecnologia Farmacêutica, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil
| | - Maria Cecília Bastos Vieira de Souza
- Programa de Pós-Graduação em Química, Instituto de Química, Universidade Federal Fluminense, 24010-141, Outeiro de São João Batista, s/n, Niterói, Rio de Janeiro, Brazil.
| | - Patricia Zancan
- Laboratório de Oncobiologia Molecular (LabOMol), Departamento de Biotecnologia Farmacêutica, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil.
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14
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He Y, Ao N, Yang J, Wang X, Jin S, Du J. The preventive effect of liraglutide on the lipotoxic liver injury via increasing autophagy. Ann Hepatol 2021; 19:44-52. [PMID: 31787541 DOI: 10.1016/j.aohep.2019.06.023] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 06/25/2019] [Accepted: 06/25/2019] [Indexed: 02/04/2023]
Abstract
INTRODUCTION AND OBJECTIVES The incidence of non-alcoholic fatty liver disease (NAFLD) is increasing. Previous studies indicated that Liraglutide, glucagon-like peptide-1 analogue, could regulate glucose homeostasis as a valuable treatment for Type 2 Diabetes. However, the precise effect of Liraglutide on NAFLD model in rats and the mechanism remains unknown. In this study, we investigated the molecular mechanism by which Liraglutide ameliorates hepatic steatosis in a high-fat diet (HFD)-induced rat model of NAFLD in vivo and in vitro. MATERIALS AND METHODS NALFD rat models and hepatocyte steatosis in HepG2 cells were induced by HFD and palmitate fatty acid treatment, respectively. AMPK inhibitor, Compound C was added in HepG2 cells. Autophagy-related proteins LC3, Beclin1 and Atg7, and AMPK pathway-associated proteins were evaluated by Western blot and RT-PCR. RESULTS Liraglutide enhanced autophagy as showed by the increased expression of the autophagy markers LC3, Beclin1 and Atg7 in HFD rats and HepG2 cells treated with palmitate fatty acid. In vitro, The AMPK inhibitor exhibited an inhibitory effect on Liraglutide-induced autophagy enhancement with the deceased expression of LC3, Beclin1 and Atg7. Additionally, Liraglutide treatment elevated AMPK levels and TSC1, decreased p-mTOR expression. CONCLUSIONS Liraglutide could upregulate autophagy to decrease lipid over-accumulation via the AMPK/mTOR pathway.
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Affiliation(s)
- Yini He
- Department of General Practice, The First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Na Ao
- Department of Endocrinology, The Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Jing Yang
- Department of Endocrinology, The Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Xiaochen Wang
- Department of Endocrinology, The People's Hospital of Liaoning Province, Shenyang, Liaoning, China
| | - Shi Jin
- Department of Endocrinology, The Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Jian Du
- Department of Endocrinology, The Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning, China.
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15
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Robles-Flores M, Moreno-Londoño AP, Castañeda-Patlán MC. Signaling Pathways Involved in Nutrient Sensing Control in Cancer Stem Cells: An Overview. Front Endocrinol (Lausanne) 2021; 12:627745. [PMID: 33828530 PMCID: PMC8020906 DOI: 10.3389/fendo.2021.627745] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 02/18/2021] [Indexed: 12/14/2022] Open
Abstract
Cancer cells characteristically have a high proliferation rate. Because tumor growth depends on energy-consuming anabolic processes, including biosynthesis of protein, lipid, and nucleotides, many tumor-associated conditions, including intermittent oxygen deficiency due to insufficient vascularization, oxidative stress, and nutrient deprivation, results from fast growth. To cope with these environmental stressors, cancer cells, including cancer stem cells, must adapt their metabolism to maintain cellular homeostasis. It is well- known that cancer stem cells (CSC) reprogram their metabolism to adapt to live in hypoxic niches. They usually change from oxidative phosphorylation to increased aerobic glycolysis even in the presence of oxygen. However, as opposed to most differentiated cancer cells relying on glycolysis, CSCs can be highly glycolytic or oxidative phosphorylation-dependent, displaying high metabolic plasticity. Although the influence of the metabolic and nutrient-sensing pathways on the maintenance of stemness has been recognized, the molecular mechanisms that link these pathways to stemness are not well known. Here in this review, we describe the most relevant signaling pathways involved in nutrient sensing and cancer cell survival. Among them, Adenosine monophosphate (AMP)-activated protein kinase (AMPK) pathway, mTOR pathway, and Hexosamine Biosynthetic Pathway (HBP) are critical sensors of cellular energy and nutrient status in cancer cells and interact in complex and dynamic ways.
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Affiliation(s)
- Martha Robles-Flores
- Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Mexico City, Mexico
| | - Angela P Moreno-Londoño
- Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Mexico City, Mexico
| | - M Cristina Castañeda-Patlán
- Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Mexico City, Mexico
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16
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Rostamian H, Fallah-Mehrjardi K, Khakpoor-Koosheh M, Pawelek JM, Hadjati J, Brown CE, Mirzaei HR. A metabolic switch to memory CAR T cells: Implications for cancer treatment. Cancer Lett 2020; 500:107-118. [PMID: 33290868 DOI: 10.1016/j.canlet.2020.12.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 12/01/2020] [Accepted: 12/02/2020] [Indexed: 12/27/2022]
Abstract
Therapeutic efficacy of chimeric antigen receptor (CAR) T cells is associated with their expansion, persistence and effector function. Although CAR T cell therapy has shown remarkable therapeutic effects in hematological malignancies, its therapeutic efficacy has been limited in some types of cancers - in particular, solid tumors - partially due to the cells' inability to persist and the acquisition of T cell dysfunction within a harsh immunosuppressive tumor microenvironment. Therefore, it would be expected that generation of CAR T cells with intrinsic properties for functional longevity, such as the cells with early-memory phenotypes, could beneficially enhance antitumor immunity. Furthermore, because the metabolic pathways of CAR T cells help determine cellular differentiation and lifespan, therapies targeting such pathways like glycolysis and oxidative phosphorylation, can alter CAR T cell fate and durability within tumors. Here we discuss how reprogramming of CAR T cell metabolism and metabolic switch to memory CAR T cells influences their antitumor activity. We also offer potential strategies for targeting these metabolic circuits in the setting of adoptive CAR T cell therapy, aiming to better unleash the potential of adoptive CAR T cell therapy in the clinic.
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Affiliation(s)
- Hosein Rostamian
- Department of Medical Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Keyvan Fallah-Mehrjardi
- Department of Medical Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Khakpoor-Koosheh
- Department of Medical Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - John M Pawelek
- Department of Dermatology and the Yale Cancer Center, Yale School of Medicine, New Haven, CT, USA
| | - Jamshid Hadjati
- Department of Medical Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Christine E Brown
- Department of Hematology & Hematopoietic Cell Transplantation, City of Hope Medical Center, Duarte, CA, 91010, USA; Department of Immuno-Oncology, City of Hope Beckman Research Institute, Duarte, CA, 91010, USA.
| | - Hamid R Mirzaei
- Department of Medical Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
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Xie H, Heier C, Kien B, Vesely PW, Tang Z, Sexl V, Schoiswohl G, Strießnig-Bina I, Hoefler G, Zechner R, Schweiger M. Adipose triglyceride lipase activity regulates cancer cell proliferation via AMP-kinase and mTOR signaling. Biochim Biophys Acta Mol Cell Biol Lipids 2020; 1865:158737. [PMID: 32404277 PMCID: PMC7397471 DOI: 10.1016/j.bbalip.2020.158737] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 04/15/2020] [Accepted: 05/06/2020] [Indexed: 12/25/2022]
Abstract
Aberrant fatty acid (FA) metabolism is a hallmark of proliferating cells, including untransformed fibroblasts or cancer cells. Lipolysis of intracellular triglyceride (TG) stores by adipose triglyceride lipase (ATGL) provides an important source of FAs serving as energy substrates, signaling molecules, and precursors for membrane lipids. To investigate if ATGL-mediated lipolysis impacts cell proliferation, we modified ATGL activity in murine embryonic fibroblasts (MEFs) and in five different cancer cell lines to determine the consequences on cell growth and metabolism. Genetic or pharmacological inhibition of ATGL in MEFs causes impaired FA oxidation, decreased ROS production, and a substrate switch from FA to glucose leading to decreased AMPK-mTOR signaling and higher cell proliferation rates. ATGL expression in these cancer cells is low when compared to MEFs. Additional ATGL knockdown in cancer cells did not significantly affect cellular lipid metabolism or cell proliferation whereas the ectopic overexpression of ATGL increased lipolysis and reduced proliferation. In contrast to ATGL silencing, pharmacological inhibition of ATGL by Atglistatin© impeded the proliferation of diverse cancer cell lines, which points at an ATGL-independent effect. Our data indicate a crucial role of ATGL-mediated lipolysis in the regulation of cell proliferation. The observed low ATGL activity in cancer cells may represent an evolutionary selection process and mechanism to sustain high cell proliferation rates. As the increasing ATGL activity decelerates proliferation of five different cancer cell lines this may represent a novel therapeutic strategy to counteract uncontrolled cell growth.
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Affiliation(s)
- Hao Xie
- Institute of Molecular Biosciences, University of Graz, Graz 8010, Austria
| | - Christoph Heier
- Institute of Molecular Biosciences, University of Graz, Graz 8010, Austria
| | - Benedikt Kien
- Institute of Molecular Biosciences, University of Graz, Graz 8010, Austria
| | - Paul W Vesely
- Institute of Pathology, Medical University of Graz, Graz 8010, Austria
| | - Zhiyuan Tang
- Department of Pharmacy, Affiliated Hospital of Nantong University, Nantong 226001, China
| | - Veronika Sexl
- Institute of Pharmacology and Toxicology, University of Veterinary Medicine, Vienna 1210, Austria
| | | | | | - Gerald Hoefler
- Institute of Pathology, Medical University of Graz, Graz 8010, Austria
| | - Rudolf Zechner
- Institute of Molecular Biosciences, University of Graz, Graz 8010, Austria; BioTechMed-Graz, Mozartgasse 12/II, Graz 8010, Austria.
| | - Martina Schweiger
- Institute of Molecular Biosciences, University of Graz, Graz 8010, Austria.
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18
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Matheson CJ, Casalvieri KA, Backos DS, Minhajuddin M, Jordan CT, Reigan P. Substituted oxindol-3-ylidenes as AMP-activated protein kinase (AMPK) inhibitors. Eur J Med Chem 2020; 197:112316. [PMID: 32334266 PMCID: PMC7409528 DOI: 10.1016/j.ejmech.2020.112316] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 12/05/2019] [Accepted: 04/06/2020] [Indexed: 12/22/2022]
Abstract
AMP-activated protein kinase (AMPK) is a central metabolic regulator that promotes cancer growth and survival under hypoxia and plays a role in the maintenance of cancer stem cells. A major challenge to interrogating the potential of targeting AMPK in cancer is the lack of potent and selective small molecule inhibitors. Compound C has been widely used as an AMPK inhibitor, but it lacks potency and has a poor selectivity profile. The multi-kinase inhibitor, sunitinib, has demonstrated potent nanomolar inhibition of AMPK activity and has scope for modification. Here, we have designed and synthesized several series of oxindoles to determine the structural requirements for AMPK inhibition and to improve selectivity. We identified two potent, novel oxindole-based AMPK inhibitors that were designed to interact with the DFG motif in the ATP-binding site of AMPK, this key feature evades interaction with the common recptor tyrosine kinase targets of sunitinib. Cellular engagement of AMPK by these oxindoles was confirmed by the inhibition of phosphorylation of acetyl-CoA carboxylase (ACC), a known substrate of AMPK, in myeloid leukemia cells. Interestingly, although AMPK is highly expressed and activated in K562 cells these oxindole-based AMPK inhibitors did not impact cell viability or result in significant cytotoxicity. Our studies serve as a platform for the further development of oxindole-based AMPK inhibitors with therapeutic potential.
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Affiliation(s)
- Christopher J Matheson
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, 12850 East Montview Boulevard, Aurora, CO, 80045, USA
| | - Kimberly A Casalvieri
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, 12850 East Montview Boulevard, Aurora, CO, 80045, USA
| | - Donald S Backos
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, 12850 East Montview Boulevard, Aurora, CO, 80045, USA
| | - Mohammed Minhajuddin
- Division of Hematology, University of Colorado Anschutz Medical Campus, 12700 E 19th Avenue, Aurora, CO, 80045, USA
| | - Craig T Jordan
- Division of Hematology, University of Colorado Anschutz Medical Campus, 12700 E 19th Avenue, Aurora, CO, 80045, USA
| | - Philip Reigan
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, 12850 East Montview Boulevard, Aurora, CO, 80045, USA.
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19
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Klepinin A, Zhang S, Klepinina L, Rebane-Klemm E, Terzic A, Kaambre T, Dzeja P. Adenylate Kinase and Metabolic Signaling in Cancer Cells. Front Oncol 2020; 10:660. [PMID: 32509571 PMCID: PMC7248387 DOI: 10.3389/fonc.2020.00660] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Accepted: 04/08/2020] [Indexed: 12/23/2022] Open
Abstract
A hallmark of cancer cells is the ability to rewire their bioenergetics and metabolic signaling circuits to fuel their uncontrolled proliferation and metastasis. Adenylate kinase (AK) is the critical enzyme in the metabolic monitoring of cellular adenine nucleotide homeostasis. It also directs AK→ AMP→ AMPK signaling controlling cell cycle and proliferation, and ATP energy transfer from mitochondria to distribute energy among cellular processes. The significance of AK isoform network in the regulation of a variety of cellular processes, which include cell differentiation and motility, is rapidly growing. Adenylate kinase 2 (AK2) isoform, localized in intermembrane and intra-cristae space, is vital for mitochondria nucleotide exchange and ATP export. AK2 deficiency disrupts cell energetics, causes severe human diseases, and is embryonically lethal in mice, signifying the importance of catalyzed phosphotransfer in cellular energetics. Suppression of AK phosphotransfer and AMP generation in cancer cells and consequently signaling through AMPK could be an important factor in the initiation of cancerous transformation, unleashing uncontrolled cell cycle and growth. Evidence also builds up that shift in AK isoforms is used later by cancer cells for rewiring energy metabolism to support their high proliferation activity and tumor progression. As cell motility is an energy-consuming process, positioning of AK isoforms to increased energy consumption sites could be an essential factor to incline cancer cells to metastases. In this review, we summarize recent advances in studies of the significance of AK isoforms involved in cancer cell metabolism, metabolic signaling, metastatic potential, and a therapeutic target.
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Affiliation(s)
- Aleksandr Klepinin
- Laboratory of Chemical Biology, National Institute of Chemical Physics and Biophysics, Tallinn, Estonia
| | - Song Zhang
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, United States
| | - Ljudmila Klepinina
- Laboratory of Chemical Biology, National Institute of Chemical Physics and Biophysics, Tallinn, Estonia
| | - Egle Rebane-Klemm
- Laboratory of Chemical Biology, National Institute of Chemical Physics and Biophysics, Tallinn, Estonia
| | - Andre Terzic
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, United States
| | - Tuuli Kaambre
- Laboratory of Chemical Biology, National Institute of Chemical Physics and Biophysics, Tallinn, Estonia
| | - Petras Dzeja
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, United States
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20
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Biondo LA, Teixeira AAS, de O. S. Ferreira KC, Neto JCR. Pharmacological Strategies for Insulin Sensitivity in Obesity and Cancer: Thiazolidinediones and Metformin. Curr Pharm Des 2020; 26:932-945. [DOI: 10.2174/1381612826666200122124116] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 12/21/2019] [Indexed: 12/19/2022]
Abstract
Background:
Chronic diseases, such as obesity and cancer, have high prevalence rates. Both diseases
have hyperinsulinemia, hyperglycemia, high levels of IGF-1 and inflammatory cytokines in common. Therefore,
these can be considered triggers for cancer development and growth. In addition, low-grade inflammation that
modulates the activation of immune cells, cellular metabolism, and production of cytokines and chemokines are
common in obesity, cancer, and insulin resistance. Pharmacological strategies are necessary when a change in
lifestyle does not improve glycemic homeostasis. In this regard, thiazolidinediones (TZD) possess multiple molecular
targets and regulate PPARγ in obesity and cancer related to insulin resistance, while metformin acts
through the AMPK pathway.
Objective:
The aim of this study was to review TZD and metformin as pharmacological treatments for insulin
resistance associated with obesity and cancer.
Conclusions:
Thiazolidinediones restored adiponectin secretion and leptin sensitivity, reduced lipid droplets in
hepatocytes and orexigen peptides in the hypothalamus. In cancer cells, TZD reduced proliferation, production of
reactive oxygen species, and inflammation by acting through the mTOR and NFκB pathways. Metformin has
similar effects, though these are AMPK-dependent. In addition, both drugs can be efficient against certain side
effects caused by chemotherapy.
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Affiliation(s)
- Luana A. Biondo
- Immunometabolism Research Group, Department of Cell Biology and Development, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Alexandre A. S. Teixeira
- Immunometabolism Research Group, Department of Cell Biology and Development, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Karen C. de O. S. Ferreira
- Immunometabolism Research Group, Department of Cell Biology and Development, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
| | - Jose C. R. Neto
- Immunometabolism Research Group, Department of Cell Biology and Development, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
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21
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Jin K, Ma Y, Manrique-Caballero CL, Li H, Emlet DR, Li S, Baty CJ, Wen X, Kim-Campbell N, Frank A, Menchikova EV, Pastor-Soler NM, Hallows KR, Jackson EK, Shiva S, Pinsky MR, Zuckerbraun BS, Kellum JA, Gómez H. Activation of AMP-activated protein kinase during sepsis/inflammation improves survival by preserving cellular metabolic fitness. FASEB J 2020; 34:7036-7057. [PMID: 32246808 DOI: 10.1096/fj.201901900r] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 01/24/2020] [Accepted: 03/18/2020] [Indexed: 01/08/2023]
Abstract
The purpose was to determine the role of AMPK activation in the renal metabolic response to sepsis, the development of sepsis-induced acute kidney injury (AKI) and on survival. In a prospective experimental study, 167 10- to 12-week-old C57BL/6 mice underwent cecal ligation and puncture (CLP) and human proximal tubule epithelial cells (TEC; HK2) were exposed to inflammatory mix (IM), a combination of lipopolysaccharide (LPS) and high mobility group box 1 (HMGB1). Renal/TEC metabolic fitness was assessed by monitoring the expression of drivers of oxidative phosphorylation (OXPHOS), the rates of utilization of OXPHOS/glycolysis in response to metabolic stress, and mitochondrial function by measuring O2 consumption rates (OCR) and the membrane potential (Δψm ). Sepsis/IM resulted in AKI, increased mortality, and in renal AMPK activation 6-24 hours after CLP/IM. Pharmacologic activation of AMPK with 5-aminoimidazole-4-carboxamide ribonucleotide (AICAR) or metformin during sepsis improved the survival, while AMPK inhibition with Compound C increased mortality, impaired mitochondrial respiration, decreased OCR, and disrupted TEC metabolic fitness. AMPK-driven protection was associated with increased Sirt 3 expression and restoration of metabolic fitness. Renal AMPK activation in response to sepsis/IM is an adaptive mechanism that protects TEC, organs, and the host by preserving mitochondrial function and metabolic fitness likely through Sirt3 signaling.
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Affiliation(s)
- Kui Jin
- Department of Critical Care, Anhui Provincial Hospital, He Fei, China
| | - Yujie Ma
- Department of Critical Care Medicine, Air Force Medical Center, Beijing, China
| | - Carlos L Manrique-Caballero
- Center for Critical Care Nephrology, Department of Critical Care Medicine, The CRISMA Center, University of Pittsburgh, Pittsburgh, PA, USA
| | - Hui Li
- Division of Nephrology and Hypertension and USC/UKRO Kidney Research Center, Department of Medicine, University of Southern California Keck School of Medicine, Los Angeles, CA, USA
| | - David R Emlet
- Center for Critical Care Nephrology, Department of Critical Care Medicine, The CRISMA Center, University of Pittsburgh, Pittsburgh, PA, USA
| | - Shengnan Li
- Department of Anesthesiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Catherine J Baty
- Renal Electrolyte Division, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Xiaoyan Wen
- Center for Critical Care Nephrology, Department of Critical Care Medicine, The CRISMA Center, University of Pittsburgh, Pittsburgh, PA, USA
| | - Nahmah Kim-Campbell
- Center for Critical Care Nephrology, Department of Critical Care Medicine, The CRISMA Center, University of Pittsburgh, Pittsburgh, PA, USA
| | - Alicia Frank
- Center for Critical Care Nephrology, Department of Critical Care Medicine, The CRISMA Center, University of Pittsburgh, Pittsburgh, PA, USA
| | - Elizabeth V Menchikova
- Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Nuria M Pastor-Soler
- Center for Critical Care Nephrology, Department of Critical Care Medicine, The CRISMA Center, University of Pittsburgh, Pittsburgh, PA, USA.,Division of Nephrology and Hypertension and USC/UKRO Kidney Research Center, Department of Medicine, University of Southern California Keck School of Medicine, Los Angeles, CA, USA
| | - Kenneth R Hallows
- Center for Critical Care Nephrology, Department of Critical Care Medicine, The CRISMA Center, University of Pittsburgh, Pittsburgh, PA, USA.,Division of Nephrology and Hypertension and USC/UKRO Kidney Research Center, Department of Medicine, University of Southern California Keck School of Medicine, Los Angeles, CA, USA
| | - Edwin K Jackson
- Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Sruti Shiva
- Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, PA, USA.,Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA, USA
| | - Michael R Pinsky
- Center for Critical Care Nephrology, Department of Critical Care Medicine, The CRISMA Center, University of Pittsburgh, Pittsburgh, PA, USA
| | - Brian S Zuckerbraun
- Center for Critical Care Nephrology, Department of Critical Care Medicine, The CRISMA Center, University of Pittsburgh, Pittsburgh, PA, USA.,Department of Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - John A Kellum
- Center for Critical Care Nephrology, Department of Critical Care Medicine, The CRISMA Center, University of Pittsburgh, Pittsburgh, PA, USA
| | - Hernando Gómez
- Center for Critical Care Nephrology, Department of Critical Care Medicine, The CRISMA Center, University of Pittsburgh, Pittsburgh, PA, USA.,Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA, USA
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22
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T cell metabolism: new insights in systemic lupus erythematosus pathogenesis and therapy. Nat Rev Rheumatol 2020; 16:100-112. [PMID: 31949287 DOI: 10.1038/s41584-019-0356-x] [Citation(s) in RCA: 155] [Impact Index Per Article: 38.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/05/2019] [Indexed: 12/12/2022]
Abstract
T cell subsets are critically involved in the development of systemic autoimmunity and organ inflammation in systemic lupus erythematosus (SLE). Each T cell subset function (such as effector, helper, memory or regulatory function) is dictated by distinct metabolic pathways requiring the availability of specific nutrients and intracellular enzymes. The activity of these enzymes or nutrient transporters influences the differentiation and function of T cells in autoimmune responses. Data are increasingly emerging on how metabolic processes control the function of various T cell subsets and how these metabolic processes are altered in SLE. Specifically, aberrant glycolysis, glutaminolysis, fatty acid and glycosphingolipid metabolism, mitochondrial hyperpolarization, oxidative stress and mTOR signalling underwrite the known function of T cell subsets in patients with SLE. A number of medications that are used in the care of patients with SLE affect cell metabolism, and the development of novel therapeutic approaches to control the activity of metabolic enzymes in T cell subsets represents a promising endeavour in the search for effective treatment of systemic autoimmune diseases.
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23
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Tang Q, Lu M, Xu B, Wang Y, Lu S, Yu Z, Jing X, Yuan J. Electroacupuncture Regulates Inguinal White Adipose Tissue Browning by Promoting Sirtuin-1-Dependent PPAR γ Deacetylation and Mitochondrial Biogenesis. Front Endocrinol (Lausanne) 2020; 11:607113. [PMID: 33551999 PMCID: PMC7859442 DOI: 10.3389/fendo.2020.607113] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Accepted: 12/04/2020] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Previous studies had suggested that electroacupuncture (EA) can promote white adipose tissue (WAT) browning to counter obesity. But the mechanism was still not very clear. AIM In this study, we aim to study the effect of EA on promoting inguinal WAT (iWAT) browning and its possible mechanism. METHOD Three-week-old rats were randomly divided into a normal diet (ND) group and a high-fat diet (HFD) group. After 10 weeks, the HFD rats were grouped into HFD + EA group and HFD control group. Rats in the EA group were electro-acupunctured for 4 weeks on Tianshu (ST25) acupoint under gas anesthesia with isoflurane, while the rats in HFD group were under gas anesthesia only. Body weight and cumulative food intake were monitored, and H&E staining was performed to assess adipocyte area. The effect of EA on WAT was assessed by qPCR, immunoblotting, immunoprecipitation and Co-immunoprecipitation. Mitochondria were isolated from IWAT to observe the expression of mitochondrial transcription factor A (TFAM). RESULTS The body weight, WAT/body weight ratio and cumulative food consumption obviously decreased (P < 0.05) in the EA group. The expressions of brown adipose tissue (BAT) markers were increased in the iWAT of EA rats. Nevertheless, the mRNA expressions of WAT genes were suppressed by 4-week EA treatment. Moreover, EA increased the protein expressions of SIRT-1, PPARγ, PGC-1α, UCP1 and PRDM16 which trigger the molecular conversion of iWAT browning. The decrease of PPARγ acetylation was also found in EA group, indicating EA could advance WAT-browning through SIRT-1 dependent PPARγ deacetylation pathway. Besides, we found that EA could activate AMPK to further regulate PGC-1α-TFAM-UCP1 pathway to induce mitochondrial biogenesis. CONCLUSION In conclusion, EA can remodel WAT to BAT through inducing SIRT-1 dependent PPARγ deacetylation, and regulating PGC-1α-TFAM-UCP1 pathway to induce mitochondrial biogenesis. This may be one of the mechanisms by which EA affects weight loss.
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Affiliation(s)
| | | | | | | | | | | | - Xinyue Jing
- *Correspondence: Xinyue Jing, ; Jinhong Yuan,
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24
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Michaeloudes C, Bhavsar PK, Mumby S, Xu B, Hui CKM, Chung KF, Adcock IM. Role of Metabolic Reprogramming in Pulmonary Innate Immunity and Its Impact on Lung Diseases. J Innate Immun 2019; 12:31-46. [PMID: 31786568 DOI: 10.1159/000504344] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 10/24/2019] [Indexed: 12/12/2022] Open
Abstract
Lung innate immunity is the first line of defence against inhaled allergens, pathogens and environmental pollutants. Cellular metabolism plays a key role in innate immunity. Catabolic pathways, including glycolysis and fatty acid oxidation (FAO), are interconnected with biosynthetic and redox pathways. Innate immune cell activation and differentiation trigger extensive metabolic changes that are required to support their function. Pro-inflammatory polarisation of macrophages and activation of dendritic cells, mast cells and neutrophils are associated with increased glycolysis and a shift towards the pentose phosphate pathway and fatty acid synthesis. These changes provide the macromolecules required for proliferation and inflammatory mediator production and reactive oxygen species for anti-microbial effects. Conversely, anti-inflammatory macrophages use primarily FAO and oxidative phosphorylation to ensure efficient energy production and redox balance required for prolonged survival. Deregulation of metabolic reprogramming in lung diseases, such as asthma and chronic obstructive pulmonary disease, may contribute to impaired innate immune cell function. Understanding how innate immune cell metabolism is altered in lung disease may lead to identification of new therapeutic targets. This is important as drugs targeting a number of metabolic pathways are already in clinical development for the treatment of other diseases such as cancer.
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Affiliation(s)
- Charalambos Michaeloudes
- Experimental Studies and Cell and Molecular Biology, Airway Disease Section, National Heart and Lung Institute, Imperial College London and Biomedical Research Unit, Royal Brompton Hospital, London, United Kingdom,
| | - Pankaj K Bhavsar
- Experimental Studies and Cell and Molecular Biology, Airway Disease Section, National Heart and Lung Institute, Imperial College London and Biomedical Research Unit, Royal Brompton Hospital, London, United Kingdom
| | - Sharon Mumby
- Experimental Studies and Cell and Molecular Biology, Airway Disease Section, National Heart and Lung Institute, Imperial College London and Biomedical Research Unit, Royal Brompton Hospital, London, United Kingdom
| | - Bingling Xu
- Respiratory and Critical Care Medicine, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Christopher Kim Ming Hui
- Respiratory and Critical Care Medicine, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Kian Fan Chung
- Experimental Studies and Cell and Molecular Biology, Airway Disease Section, National Heart and Lung Institute, Imperial College London and Biomedical Research Unit, Royal Brompton Hospital, London, United Kingdom
| | - Ian M Adcock
- Experimental Studies and Cell and Molecular Biology, Airway Disease Section, National Heart and Lung Institute, Imperial College London and Biomedical Research Unit, Royal Brompton Hospital, London, United Kingdom
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25
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Li Y, Sun R, Zou J, Ying Y, Luo Z. Dual Roles of the AMP-Activated Protein Kinase Pathway in Angiogenesis. Cells 2019; 8:E752. [PMID: 31331111 PMCID: PMC6678403 DOI: 10.3390/cells8070752] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 07/11/2019] [Accepted: 07/14/2019] [Indexed: 12/21/2022] Open
Abstract
Angiogenesis plays important roles in development, stress response, wound healing, tumorigenesis and cancer progression, diabetic retinopathy, and age-related macular degeneration. It is a complex event engaging many signaling pathways including vascular endothelial growth factor (VEGF), Notch, transforming growth factor-beta/bone morphogenetic proteins (TGF-β/BMPs), and other cytokines and growth factors. Almost all of them eventually funnel to two crucial molecules, VEGF and hypoxia-inducing factor-1 alpha (HIF-1α) whose expressions could change under both physiological and pathological conditions. Hypoxic conditions stabilize HIF-1α, while it is upregulated by many oncogenic factors under normaxia. HIF-1α is a critical transcription activator for VEGF. Recent studies have shown that intracellular metabolic state participates in regulation of sprouting angiogenesis, which may involve AMP-activated protein kinase (AMPK). Indeed, AMPK has been shown to exert both positive and negative effects on angiogenesis. On the one hand, activation of AMPK mediates stress responses to facilitate autophagy which stabilizes HIF-1α, leading to increased expression of VEGF. On the other hand, AMPK could attenuate angiogenesis induced by tumor-promoting and pro-metastatic factors, such as the phosphoinositide 3-kinase /protein kinase B (Akt)/mammalian target of rapamycin (PI3K/Akt/mTOR), hepatic growth factor (HGF), and TGF-β/BMP signaling pathways. Thus, this review will summarize research progresses on these two opposite effects and discuss the mechanisms behind the discrepant findings.
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Affiliation(s)
- Yuanjun Li
- Jiangxi Provincial Key Laboratory of Tumor Pathogens and Molecular Pathology, Department of Pathophysiology, School of Basic Medical Sciences, Nanchang University Jiangxi Medical College, Nanchang, Jiangxi, Post Code 330006, China
| | - Ruipu Sun
- Queen Mary School, Nanchang University Jiangxi Medical College, Nanchang, Jiangxi 30006, China
| | - Junrong Zou
- Jiangxi Provincial Key Laboratory of Tumor Pathogens and Molecular Pathology, Department of Pathophysiology, School of Basic Medical Sciences, Nanchang University Jiangxi Medical College, Nanchang, Jiangxi, Post Code 330006, China
| | - Ying Ying
- Jiangxi Provincial Key Laboratory of Tumor Pathogens and Molecular Pathology, Department of Pathophysiology, School of Basic Medical Sciences, Nanchang University Jiangxi Medical College, Nanchang, Jiangxi, Post Code 330006, China
| | - Zhijun Luo
- Jiangxi Provincial Key Laboratory of Tumor Pathogens and Molecular Pathology, Department of Pathophysiology, School of Basic Medical Sciences, Nanchang University Jiangxi Medical College, Nanchang, Jiangxi, Post Code 330006, China.
- Queen Mary School, Nanchang University Jiangxi Medical College, Nanchang, Jiangxi 30006, China.
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26
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Guo J, Yang Y, Zhang J, Guo M, Xiang L, Yu S, Ping H, Zhuo L. microRNA‐448 inhibits stemness maintenance and self‐renewal of hepatocellular carcinoma stem cells through the MAGEA6‐mediated AMPK signaling pathway. J Cell Physiol 2019; 234:23461-23474. [PMID: 31232474 DOI: 10.1002/jcp.28915] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 05/17/2019] [Accepted: 05/20/2019] [Indexed: 12/23/2022]
Affiliation(s)
- Jun‐Cheng Guo
- Affiliated Haikou Hospital, Xiangya School of Medicine Central South University Haikou China
- Graduate School Central South University Changsha China
| | - Yi‐Jun Yang
- Affiliated Haikou Hospital, Xiangya School of Medicine Central South University Haikou China
| | - Jian‐Quan Zhang
- Affiliated Haikou Hospital, Xiangya School of Medicine Central South University Haikou China
| | - Min Guo
- Psychological Research Center Hainan General Hospital Haikou China
| | - Li Xiang
- The Third People's Hospital of Hubei Province Wuhan China
| | - Shu‐Feng Yu
- Affiliated Haikou Hospital, Xiangya School of Medicine Central South University Haikou China
| | - Huang Ping
- Psychological Research Center Hainan General Hospital Haikou China
| | - Liu Zhuo
- Psychological Research Center Hainan General Hospital Haikou China
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27
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Yang H, Lv H, Li H, Ci X, Peng L. Oridonin protects LPS-induced acute lung injury by modulating Nrf2-mediated oxidative stress and Nrf2-independent NLRP3 and NF-κB pathways. Cell Commun Signal 2019; 17:62. [PMID: 31186013 PMCID: PMC6558832 DOI: 10.1186/s12964-019-0366-y] [Citation(s) in RCA: 143] [Impact Index Per Article: 28.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 05/14/2019] [Indexed: 12/24/2022] Open
Abstract
Background Oxidative stress and the resulting inflammation are essential pathological processes in acute lung injury (ALI). Nuclear factor erythroid 2-related factor 2 (Nrf2), a vital transcriptional factor, possesses antioxidative potential and has become a primary target to treat many diseases. Oridonin (Ori), isolated from the plant Rabdosia Rrubescens, is a natural substance that possesses antioxidative and anti-inflammatory effects. Our aim was to study whether the anti-inflammatory and antioxidant effects of Ori on LPS-induced ALI were mediated by Nrf2. Methods MTT assays, Western blotting analysis, a mouse model, and hematoxylin-eosin (H & E) staining were employed to explore the mechanisms by which Ori exerts a protective effect on LPS-induced lung injury in RAW264.7 cells and in a mouse model. Results Our results indicated that Ori increased the expression of Nrf2 and its downstream genes (HO-1, GCLM), which was mediated by the activation of Akt and MAPK. Additionally, Ori inhibited LPS-induced activation of the pro-inflammatory pathways NLRP3 inflammasome and NF-κB pathways. These two pathways were also proven to be Nrf2-independent by the use of a Nrf2 inhibitor. In keeping with these findings, Ori alleviated LPS-induced histopathological changes, the enhanced production of myeloperoxidase and malondialdehyde, and the depleted expression of GSH and superoxide dismutase in the lung tissue of mice. Furthermore, the expression of LPS-induced NLRP3 inflammasome and NF-κB pathways was more evident in Nrf2-deficient mice but could still be reversed by Ori. Conclusions Our results demonstrated that Ori exerted protective effects on LPS-induced ALI via Nrf2-independent anti-inflammatory and Nrf2-dependent antioxidative activities.
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Affiliation(s)
- Huahong Yang
- Institute of Translational Medicine, The First Hospital of Jilin University, Dongminzhu road 519, Changchun, Jilin, 130001, People's Republic of China.,Department of Respiratory Medicine, The First Hospital of Jilin University, Xinmin road 71, Changchun, Jilin, 130001, People's Republic of China
| | - Hongming Lv
- Institute of Translational Medicine, The First Hospital of Jilin University, Dongminzhu road 519, Changchun, Jilin, 130001, People's Republic of China
| | - Haijun Li
- Institute of Translational Medicine, The First Hospital of Jilin University, Dongminzhu road 519, Changchun, Jilin, 130001, People's Republic of China
| | - Xinxin Ci
- Institute of Translational Medicine, The First Hospital of Jilin University, Dongminzhu road 519, Changchun, Jilin, 130001, People's Republic of China. .,Department of Respiratory Medicine, The First Hospital of Jilin University, Xinmin road 71, Changchun, Jilin, 130001, People's Republic of China.
| | - Liping Peng
- Department of Respiratory Medicine, The First Hospital of Jilin University, Xinmin road 71, Changchun, Jilin, 130001, People's Republic of China.
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28
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de Groot S, Pijl H, van der Hoeven JJM, Kroep JR. Effects of short-term fasting on cancer treatment. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2019; 38:209. [PMID: 31113478 PMCID: PMC6530042 DOI: 10.1186/s13046-019-1189-9] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 04/22/2019] [Indexed: 12/14/2022]
Abstract
Growing preclinical evidence shows that short-term fasting (STF) protects from toxicity while enhancing the efficacy of a variety of chemotherapeutic agents in the treatment of various tumour types. STF reinforces stress resistance of healthy cells, while tumor cells become even more sensitive to toxins, perhaps through shortage of nutrients to satisfy their needs in the context of high proliferation rates and/or loss of flexibility to respond to extreme circumstances. In humans, STF may be a feasible approach to enhance the efficacy and tolerability of chemotherapy. Clinical research evaluating the potential of STF is in its infancy. This review focuses on the molecular background, current knowledge and clinical trials evaluating the effects of STF in cancer treatment. Preliminary data show that STF is safe, but challenging in cancer patients receiving chemotherapy. Ongoing clinical trials need to unravel if STF can also diminish toxicity and increase efficacy of chemotherapeutic regimes in daily practice.
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Affiliation(s)
- Stefanie de Groot
- Department of Medical Oncology, Leiden University Medical Center, Albinusdreef 2, P.O. Box 9600, 2300RC, Leiden, The Netherlands
| | - Hanno Pijl
- Department of Endocrinology, Leiden University Medical Center, P.O. Box 9600, 2300RC, Leiden, The Netherlands
| | - Jacobus J M van der Hoeven
- Department of Medical Oncology, Leiden University Medical Center, Albinusdreef 2, P.O. Box 9600, 2300RC, Leiden, The Netherlands
| | - Judith R Kroep
- Department of Medical Oncology, Leiden University Medical Center, Albinusdreef 2, P.O. Box 9600, 2300RC, Leiden, The Netherlands.
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29
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Jiang S, Wang Y, Luo L, Shi F, Zou J, Lin H, Ying Y, Luo Y, Zhan Z, Liu P, Zhu B, Huang D, Luo Z. AMP-activated protein kinase regulates cancer cell growth and metabolism via nuclear and mitochondria events. J Cell Mol Med 2019; 23:3951-3961. [PMID: 30993829 PMCID: PMC6533503 DOI: 10.1111/jcmm.14279] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Accepted: 02/25/2019] [Indexed: 12/18/2022] Open
Abstract
Adenine monophosphate‐activated protein kinase (AMPK) is a fuel sensing enzyme that is activated in shortage of energy and inhibited in its surplus. Cancer is a metabolic disease characteristic of aerobic glycolysis, namely Warburg effect, and possesses heterogeneity featured by spatiotemporal hypoxia and normoxia, where AMPK is deeply implicated. The present study delineates the regulation of mitochondrial functions by AMPK in cancer cells. On the one hand, AMPKα subunit binds to mitochondria independently of β subunit and targeting AMPK to mitochondria facilitates oxidative phosphorylation and fatty acid oxidation, and inhibits glycolysis. As such, mitochondrial AMPK inhibits the growth of cancer cells and tumorigenesis. On the other hand, ablation of the β subunits completely abolishes AMPK activity and simultaneously leads to decreases in mitochondria DNA and protein contents. The effect of the β deletion is rescued by overexpression of the active mutant of bulky AMPKα1 subunit. In conjunction, the transcriptional factors PGC1α and Nrf‐1 are up‐regulated by LKB1/AMPK, an event that is abolished in the absence of the β subunits. Intriguingly, the stimulation of mitochondria biogenesis is not achieved by mitochondria‐targeted AMPK. Therefore, our study suggests that AMPK inhibits cancer cell growth and tumorigenesis via regulation of mitochondria‐mediated metabolism.
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Affiliation(s)
- Shanshan Jiang
- Institute of Digestive Diseases, The First Affiliated Hospital, Nanchang, China.,Jiangxi Provincial Key Laboratory of Tumor Pathogens and Molecular Pathology, Department of Pathophysiology, Schools of Basic Sciences, Nanchang, China.,Institute of Hematological Research, Shaanxi Provincial People's Hospital, Xi'an, China
| | - Yan Wang
- Jiangxi Provincial Key Laboratory of Tumor Pathogens and Molecular Pathology, Department of Pathophysiology, Schools of Basic Sciences, Nanchang, China.,Pharmaceutical Sciences, Nanchang University Jiangxi Medical College, Nanchang, China
| | - Lingyu Luo
- Institute of Digestive Diseases, The First Affiliated Hospital, Nanchang, China
| | - Fuli Shi
- Institute of Digestive Diseases, The First Affiliated Hospital, Nanchang, China.,Pharmaceutical Sciences, Nanchang University Jiangxi Medical College, Nanchang, China
| | - Junrong Zou
- Jiangxi Provincial Key Laboratory of Tumor Pathogens and Molecular Pathology, Department of Pathophysiology, Schools of Basic Sciences, Nanchang, China.,Pharmaceutical Sciences, Nanchang University Jiangxi Medical College, Nanchang, China
| | - Hui Lin
- Jiangxi Provincial Key Laboratory of Tumor Pathogens and Molecular Pathology, Department of Pathophysiology, Schools of Basic Sciences, Nanchang, China
| | - Ying Ying
- Jiangxi Provincial Key Laboratory of Tumor Pathogens and Molecular Pathology, Department of Pathophysiology, Schools of Basic Sciences, Nanchang, China
| | - Yunfei Luo
- Jiangxi Provincial Key Laboratory of Tumor Pathogens and Molecular Pathology, Department of Pathophysiology, Schools of Basic Sciences, Nanchang, China
| | - Zhan Zhan
- Jiangxi Provincial Key Laboratory of Tumor Pathogens and Molecular Pathology, Department of Pathophysiology, Schools of Basic Sciences, Nanchang, China.,Pharmaceutical Sciences, Nanchang University Jiangxi Medical College, Nanchang, China
| | - Peijun Liu
- Center for Translational Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Bo Zhu
- Department of Pharmacology and Experimental Therapeutics, Boston University School of Medicine, Boston, Massachusetts
| | - Deqiang Huang
- Institute of Digestive Diseases, The First Affiliated Hospital, Nanchang, China
| | - Zhijun Luo
- Institute of Digestive Diseases, The First Affiliated Hospital, Nanchang, China.,Jiangxi Provincial Key Laboratory of Tumor Pathogens and Molecular Pathology, Department of Pathophysiology, Schools of Basic Sciences, Nanchang, China
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30
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Aledavood E, Moraes G, Lameira J, Castro A, Luque FJ, Estarellas C. Understanding the Mechanism of Direct Activation of AMP-Kinase: Toward a Fine Allosteric Tuning of the Kinase Activity. J Chem Inf Model 2019; 59:2859-2870. [PMID: 30924649 DOI: 10.1021/acs.jcim.8b00890] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Mammalian AMP-activated protein kinase (AMPK) is a Ser/Thr protein kinase with a key role as a sensor in cellular energy homeostasis. It has a major role in numerous metabolic disorders, such as type 2 diabetes, obesity, and cancer, and hence it has gained progressive interest as a potential therapeutic target. AMPK is a heterotrimeric enzyme composed by an α-catalytic subunit and two regulatory subunits, β and γ. It is regulated by several mechanisms, including indirect activators such as metformin and direct activators such as compound A-769662. The crystal structure of AMPK bound to A-769662 has been recently reported, suggesting a hypothetical allosteric mechanism of AMPK activation assisted by phosphorylated Ser108 at the β-subunit. Here, we have studied the direct activation mechanism of A-769662 by means of molecular dynamics simulations, suggesting that the activator may act as a glue, coupling the dynamical motion of the β-subunit and the N-terminal domain of the α-subunit, and assisting the preorganization of the ATP-binding site. This is achieved through the formation of an allosteric network that connects the activator and ATP-binding sites, particularly through key interactions formed between αAsp88 and βArg83 and between βpSer108 and αLys29. Overall, these studies shed light into key mechanistic determinants of the allosteric regulation of this cellular energy sensor, and pave the way for the fine-tuning of the rational design of direct activators of this cellular energy sensor.
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Affiliation(s)
- Elnaz Aledavood
- Department of Nutrition, Food Science and Gastronomy, Faculty of Pharmacy and Food Sciences, Institute of Biomedicina (IBUB) and Institute of Theoretical and Computational Chemistry (IQTCUB) , University of Barcelona , Santa Coloma de Gramenet 08921 , Spain
| | - Gleiciane Moraes
- Faculdade de Ciências Naturais , Campus Universitário do Marajó-Breves, Universidade Federal do Pará (CUMB-UFPA) , Breves , Brasil
| | - Jeronimo Lameira
- Faculdade de Ciências Naturais , Campus Universitário do Marajó-Breves, Universidade Federal do Pará (CUMB-UFPA) , Breves , Brasil
| | - Ana Castro
- Instituto de Química Médica, Consejo Superior de Investigaciones Científicas (IQM-CSIC) , 28006 Madrid , Spain
| | - F Javier Luque
- Department of Nutrition, Food Science and Gastronomy, Faculty of Pharmacy and Food Sciences, Institute of Biomedicina (IBUB) and Institute of Theoretical and Computational Chemistry (IQTCUB) , University of Barcelona , Santa Coloma de Gramenet 08921 , Spain
| | - Carolina Estarellas
- Department of Nutrition, Food Science and Gastronomy, Faculty of Pharmacy and Food Sciences, Institute of Biomedicina (IBUB) and Institute of Theoretical and Computational Chemistry (IQTCUB) , University of Barcelona , Santa Coloma de Gramenet 08921 , Spain
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31
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Jo EK, Silwal P, Yuk JM. AMPK-Targeted Effector Networks in Mycobacterial Infection. Front Microbiol 2019; 10:520. [PMID: 30930886 PMCID: PMC6429987 DOI: 10.3389/fmicb.2019.00520] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 02/28/2019] [Indexed: 12/22/2022] Open
Abstract
AMP-activated protein kinase (AMPK), a key metabolic regulator, plays an essential role in the maintenance of energy balance in response to stress. Tuberculosis (TB), primarily caused by the pathogen Mycobacterium tuberculosis (Mtb), remains one of the most important infectious diseases worldwide, characterized by both high incidence and mortality. Development of new preventive and therapeutic strategies against TB requires a profound understanding of the various host-pathogen interactions that occur during infection. Emerging data suggest that AMPK plays an essential regulatory role in host autophagy, mitochondrial biogenesis, metabolic reprogramming, fatty acid β-oxidation, and the control of pathologic inflammation in macrophages during Mtb infection. As described in this review, recent studies have begun to define the functional properties of AMPK modulators capable of restricting intracellular bacteria and promoting host defenses. Several host defense factors in the context of AMPK activation also participate in autophagic and non-autophagic pathways in a coordinated manner to enhance antimicrobial responses against Mtb infection. A better understanding of these AMPK-targeted effector networks offers significant potential for the development of novel therapeutics for human TB and other infectious diseases.
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Affiliation(s)
- Eun-Kyeong Jo
- Department of Microbiology, School of Medicine, Chungnam National University, Daejeon, South Korea.,Infection Control Convergence Research Center, School of Medicine, Chungnam National University, Daejeon, South Korea.,Department of Medical Science, School of Medicine, Chungnam National University, Daejeon, South Korea
| | - Prashanta Silwal
- Department of Microbiology, School of Medicine, Chungnam National University, Daejeon, South Korea.,Infection Control Convergence Research Center, School of Medicine, Chungnam National University, Daejeon, South Korea
| | - Jae-Min Yuk
- Infection Control Convergence Research Center, School of Medicine, Chungnam National University, Daejeon, South Korea.,Department of Medical Science, School of Medicine, Chungnam National University, Daejeon, South Korea.,Department of Infection Biology, School of Medicine, Chungnam National University, Daejeon, South Korea
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32
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Rezende LP, Galheigo MRU, Landim BC, Cruz AR, Botelho FV, Zanon RG, Góes RM, Ribeiro DL. Effect of glucose and palmitate environment on proliferation and migration of PC3‐prostate cancer cells. Cell Biol Int 2019; 43:373-383. [DOI: 10.1002/cbin.11066] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 10/07/2018] [Indexed: 01/28/2023]
Affiliation(s)
- Lívia Prometti Rezende
- Department of Cell Biology, Histology and EmbriologyInstitute of Biomedical Sciences—ICBIMFederal University of UberlândiaUberlândiaBrazil
| | - Maria Raquel Unterkircher Galheigo
- Department of Cell Biology, Histology and EmbriologyInstitute of Biomedical Sciences—ICBIMFederal University of UberlândiaUberlândiaBrazil
| | - Breno Costa Landim
- Department of Cell Biology, Histology and EmbriologyInstitute of Biomedical Sciences—ICBIMFederal University of UberlândiaUberlândiaBrazil
| | - Amanda Rodrigues Cruz
- Department of Cell Biology, Histology and EmbriologyInstitute of Biomedical Sciences—ICBIMFederal University of UberlândiaUberlândiaBrazil
| | | | - Renata Graciele Zanon
- Department of AnatomyInstitute of Biomedical Sciences—ICBIMFederal University of UberlândiaUberlândiaBrazil
| | - Rejane Maira Góes
- Department of BiologyInstitute of Biosciences, Humanities and Exact SciencesState University of São Paulo—UNESPSão PauloBrazil
| | - Daniele Lisboa Ribeiro
- Department of Cell Biology, Histology and EmbriologyInstitute of Biomedical Sciences—ICBIMFederal University of UberlândiaUberlândiaBrazil
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33
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Liu M, Zhang Z, Wang H, Chen X, Jin C. Activation of AMPK by metformin promotes renal cancer cell proliferation under glucose deprivation through its interaction with PKM2. Int J Biol Sci 2019; 15:617-627. [PMID: 30745848 PMCID: PMC6367591 DOI: 10.7150/ijbs.29689] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 10/31/2018] [Indexed: 01/03/2023] Open
Abstract
Metformin, a common therapeutics for type 2 diabetics, was recently demonstrated to possess antitumor activity in various cancer types. However, its therapy effect in renal cell carcinoma (RCC) still remains controversial. In this study, we found that metformin treatment in RCC cells lead to activation of AMPK, which suppressed the cell proliferation under normal condition, but enhanced cell proliferation under glucose deprivation (GD) condition. Depletion of AMPK by siRNA abolished the proliferation effect of MF under GD condition. Mechanistic investigations revealed that the effect of AMPK on cell proliferation under GD condition is dependent on its nuclear translocation. Moreover, the nuclear AMPK recruits PKM2 and β-Catenin to form a complex, which promotes the transcription of cell proliferation related genes, including CCND1 and c-Myc. Furthermore, depletion of PKM2 or β-Catenin abrogated the proliferative effects of metformin under GD condition. And inhibition of PKM2 also re-sensitized the A498 xenograft in response to metformin treatment. Together, our results suggested that combined of AMPK activation and PKM2 depletion or inhibition can achieve better therapeutic effect for RCC patients.
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Affiliation(s)
- Meihan Liu
- Department of Ultrasonography, China-Japan Union Hospital, Jilin University, Changchun, China
| | - Zhuo Zhang
- Department of Urology, China-Japan Union Hospital, Jilin University, Changchun, China
| | - Hui Wang
- Department of Ultrasonography, China-Japan Union Hospital, Jilin University, Changchun, China
| | - Xiaoliang Chen
- Department of Urology, China-Japan Union Hospital, Jilin University, Changchun, China
| | - Chunxiang Jin
- Department of Ultrasonography, China-Japan Union Hospital, Jilin University, Changchun, China
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34
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Silwal P, Kim JK, Yuk JM, Jo EK. AMP-Activated Protein Kinase and Host Defense against Infection. Int J Mol Sci 2018; 19:ijms19113495. [PMID: 30404221 PMCID: PMC6274990 DOI: 10.3390/ijms19113495] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 11/05/2018] [Accepted: 11/05/2018] [Indexed: 02/07/2023] Open
Abstract
5′-AMP-activated protein kinase (AMPK) plays diverse roles in various physiological and pathological conditions. AMPK is involved in energy metabolism, which is perturbed by infectious stimuli. Indeed, various pathogens modulate AMPK activity, which affects host defenses against infection. In some viral infections, including hepatitis B and C viral infections, AMPK activation is beneficial, but in others such as dengue virus, Ebola virus, and human cytomegaloviral infections, AMPK plays a detrimental role. AMPK-targeting agents or small molecules enhance the antiviral response and contribute to the control of microbial and parasitic infections. In addition, this review focuses on the double-edged role of AMPK in innate and adaptive immune responses to infection. Understanding how AMPK regulates host defenses will enable development of more effective host-directed therapeutic strategies against infectious diseases.
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Affiliation(s)
- Prashanta Silwal
- Department of Microbiology, Chungnam National University School of Medicine, Daejeon 35015, Korea.
- Infection Control Convergence Research Center, Chungnam National University School of Medicine, Daejeon 35015, Korea.
| | - Jin Kyung Kim
- Department of Microbiology, Chungnam National University School of Medicine, Daejeon 35015, Korea.
- Infection Control Convergence Research Center, Chungnam National University School of Medicine, Daejeon 35015, Korea.
- Department of Medical Science, Chungnam National University School of Medicine, Daejeon 35015, Korea.
| | - Jae-Min Yuk
- Department of Infection Biology, Chungnam National University School of Medicine, Daejeon 35015, Korea.
| | - Eun-Kyeong Jo
- Department of Microbiology, Chungnam National University School of Medicine, Daejeon 35015, Korea.
- Infection Control Convergence Research Center, Chungnam National University School of Medicine, Daejeon 35015, Korea.
- Department of Medical Science, Chungnam National University School of Medicine, Daejeon 35015, Korea.
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Schafer JR, Salzillo TC, Chakravarti N, Kararoudi MN, Trikha P, Foltz JA, Wang R, Li S, Lee DA. Education-dependent activation of glycolysis promotes the cytolytic potency of licensed human natural killer cells. J Allergy Clin Immunol 2018; 143:346-358.e6. [PMID: 30096390 DOI: 10.1016/j.jaci.2018.06.047] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 05/23/2018] [Accepted: 06/01/2018] [Indexed: 12/30/2022]
Abstract
BACKGROUND The mechanism by which natural killer (NK) cell education results in licensed NK cells with heightened effector function against missing self-targets is not known. OBJECTIVE We sought to identify potential mechanisms of enhanced function in licensed human NK cells. METHODS We used expanded human NK cells from killer immunoglobulin-like receptor (KIR)/HLA-genotyped donors sorted for single-KIR+ cells to generate pure populations of licensed and unlicensed NK cells. We performed proteomic and gene expression analysis of these cells before and after receptor cross-linking and performed functional and metabolic analysis before and after interference with selected metabolic pathways. We verified key findings using freshly isolated and sorted NK cells from peripheral blood. RESULTS We confirmed that licensed human NK cells are greater in number in peripheral blood and proliferate more in vitro than unlicensed NK cells. Using high-throughput protein analysis, we found that unstimulated licensed NK cells have increased expression of the glycolytic enzyme pyruvate kinase muscle isozyme M2 and after KIR cross-linking have increased phosphorylation of the metabolic modulators p38-α and 5' adenosine monophosphate-activated protein kinase α. After cytokine expansion and activation, unlicensed NK cells depended solely on mitochondrial respiration for cytolytic function, whereas licensed NK cells demonstrated metabolic reprogramming toward glycolysis and mitochondrial-dependent glutaminolysis, leading to accumulation of glycolytic metabolites and depletion of glutamate. As such, blocking both glycolysis and mitochondrial-dependent respiration was required to suppress the cytotoxicity of licensed NK cells. CONCLUSIONS Collectively, our data support an arming model of education in which enhanced glycolysis in licensed NK cells supports proliferative and cytotoxic capacity.
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Affiliation(s)
- Jolie R Schafer
- Graduate School of Biomedical Sciences, University of Texas MD Anderson Cancer Center-UT Health, Houston, Tex; Departments of Pediatrics Research, University of Texas MD Anderson Cancer Center, Houston, Tex
| | - Travis C Salzillo
- Graduate School of Biomedical Sciences, University of Texas MD Anderson Cancer Center-UT Health, Houston, Tex; Cancer Systems Imaging Houston, University of Texas MD Anderson Cancer Center, Houston, Tex
| | - Nitin Chakravarti
- Center for Childhood Cancer and Blood Diseases, Nationwide Children's Hospital, Columbus, Ohio
| | - Meisam Naeimi Kararoudi
- Center for Childhood Cancer and Blood Diseases, Nationwide Children's Hospital, Columbus, Ohio
| | - Prashant Trikha
- Center for Childhood Cancer and Blood Diseases, Nationwide Children's Hospital, Columbus, Ohio
| | - Jennifer A Foltz
- Center for Childhood Cancer and Blood Diseases, Nationwide Children's Hospital, Columbus, Ohio
| | - Ruoning Wang
- Center for Childhood Cancer and Blood Diseases, Nationwide Children's Hospital, Columbus, Ohio; Department of Pediatrics, Ohio State University, Columbus, Ohio
| | - Shulin Li
- Graduate School of Biomedical Sciences, University of Texas MD Anderson Cancer Center-UT Health, Houston, Tex; Departments of Pediatrics Research, University of Texas MD Anderson Cancer Center, Houston, Tex
| | - Dean A Lee
- Center for Childhood Cancer and Blood Diseases, Nationwide Children's Hospital, Columbus, Ohio; Department of Pediatrics, Ohio State University, Columbus, Ohio.
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36
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Zhao H, Chen D, Cao R, Wang S, Yu D, Liu Y, Jiang Y, Xu M, Luo J, Wang S. Alcohol consumption promotes colorectal carcinoma metastasis via a CCL5-induced and AMPK-pathway-mediated activation of autophagy. Sci Rep 2018; 8:8640. [PMID: 29872080 PMCID: PMC5988731 DOI: 10.1038/s41598-018-26856-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 05/21/2018] [Indexed: 12/11/2022] Open
Abstract
There is a definite relationship between alcohol consumption and colorectal cancer (CRC) development. We investigated effect of alcohol consumption on CRC patients’ progression and prognosis by utilizing epidemiological data and found patients with alcohol consumption increased risks of tumor-node-metastasis (TNM), organ metastasis and poorer prognosis. Because their tumor tissues displayed increased expression of C-C chemokine ligand 5 (CCL5), we hypothesized CCL5 might participate in cancer progression in such patients. Ethanol increased the secretion of CCL5 in two CRC cell lines, HT29 and DLD-1. Treatment with CCL5 directly increased migratory ability of these cells, whereas neutralization or knockdown of CCL5 can partially block alcohol-stimulated migration. We further investigated underlying mechanism of CCL5-induced migration. Our results indicated that effects of CCL5 on migration are mediated by the ability of CCL5 to induce autophagy, a cellular process known to be critical for migration. Using high-throughput sequencing and western blotting, we found induction of autophagy by CCL5 takes place via AMPK pathway. Aforementioned ethanol increases CCL5 secretion, CCL5 activates autophagy through AMPK pathway, and autophagy increases migration was confirmed by experiments with autophagy or AMPK inhibitors. To sum up, our study demonstrates that chronic alcohol consumption may promote metastasis of CRC through CCL5-induced autophagy.
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Affiliation(s)
- Haodong Zhao
- Department of Pathophysiology, School of Basic Medicine, Anhui Medical University, Hefei, 230032, China
| | - Danlei Chen
- Department of Pathophysiology, School of Basic Medicine, Anhui Medical University, Hefei, 230032, China
| | - Rui Cao
- Department of Pathophysiology, School of Basic Medicine, Anhui Medical University, Hefei, 230032, China
| | - Shiqing Wang
- Department of Pathophysiology, School of Basic Medicine, Anhui Medical University, Hefei, 230032, China
| | - Dandan Yu
- Department of Pathophysiology, School of Basic Medicine, Anhui Medical University, Hefei, 230032, China
| | - Yakun Liu
- Department of Pathophysiology, School of Basic Medicine, Anhui Medical University, Hefei, 230032, China
| | - Yu Jiang
- Department of Pathophysiology, School of Basic Medicine, Anhui Medical University, Hefei, 230032, China
| | - Mei Xu
- Department of Pharmacology and Nutritional Sciences, University of Kentucky College of Medicine, Lexington, Kentucky, 40536, USA
| | - Jia Luo
- Department of Pharmacology and Nutritional Sciences, University of Kentucky College of Medicine, Lexington, Kentucky, 40536, USA.
| | - Siying Wang
- Department of Pathophysiology, School of Basic Medicine, Anhui Medical University, Hefei, 230032, China.
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37
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Gao J, Ye J, Ying Y, Lin H, Luo Z. Negative regulation of TGF-β by AMPK and implications in the treatment of associated disorders. Acta Biochim Biophys Sin (Shanghai) 2018; 50:523-531. [PMID: 29873702 DOI: 10.1093/abbs/gmy028] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Indexed: 01/18/2023] Open
Abstract
Transforming growth factor beta (TGF-β) regulates a large number of biological processes, including proliferation, differentiation, immune response, and development. In addition, TGF-β plays important roles in some pathological processes, for instance, it is upregulated and activated in fibrosis and advanced cancer. Adenosine monophosphate-activated protein kinase (AMPK) acts as a fuel gauge that is activated when cells sense shortage of ATP and increase in AMP or AMP:ATP ratio. Activation of AMPK slows down anabolic processes and stimulates catabolic processes, leading to increased production of ATP. Furthermore, the functions of AMPK have been extended beyond energy homeostasis. In fact, AMPK has been shown to exert a tumor suppressive effect. Recent studies have demonstrated negative impacts of AMPK on TGF-β function. Therefore, in this review, we will discuss the differences in the biological functions of TGF-β and AMPK, and some pathological processes such as fibrosis, epithelial-mesenchymal transition (EMT) and cancer metastasis, as well as angiogenesis and heterotopic ossifications where TGF-β and AMPK exert opposite effects.
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Affiliation(s)
- Jiayu Gao
- Jiangxi Province Key Laboratory of Tumor Pathogens and Molecular Pathology, Nanchang University Jiangxi Medical College, Nanchang 330000, China
- Department of Pathology, Schools of Basic Sciences, Nanchang University Jiangxi Medical College, Nanchang 330000, China
| | - Jinhui Ye
- Jiangxi Province Key Laboratory of Tumor Pathogens and Molecular Pathology, Nanchang University Jiangxi Medical College, Nanchang 330000, China
| | - Ying Ying
- Jiangxi Province Key Laboratory of Tumor Pathogens and Molecular Pathology, Nanchang University Jiangxi Medical College, Nanchang 330000, China
| | - Hui Lin
- Jiangxi Province Key Laboratory of Tumor Pathogens and Molecular Pathology, Nanchang University Jiangxi Medical College, Nanchang 330000, China
| | - Zhijun Luo
- Jiangxi Province Key Laboratory of Tumor Pathogens and Molecular Pathology, Nanchang University Jiangxi Medical College, Nanchang 330000, China
- Department of Pathology, Schools of Basic Sciences, Nanchang University Jiangxi Medical College, Nanchang 330000, China
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38
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Zhang BB, Gao CF. d-Fagomine Attenuates High Glucose-Induced Endothelial Cell Oxidative Damage by Upregulating the Expression of PGC-1α. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:2758-2764. [PMID: 29489344 DOI: 10.1021/acs.jafc.7b05942] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
d-Fagomine, an analogue of 1-deoxynojirimycin (DNJ), has been shown to have hypoglycemic activity. This study is aimed at investigating if d-fagomine could attenuate high glucose-induced oxidative stress in human umbilical vein endothelial cells (HUVECs) and elucidate the underlying mechanism. Our results showed that d-fagomine reduced intracellular reactive oxygen species (ROS) production and malondialdehyde (MDA) levels. It also reversed the decrease of superoxide dismutases (SOD) and glutathione reductase (GR) activity, suggesting an inhibitory effect of d-fagomine on oxidative damage in HUVECs. d-Fagomine restored the loss of mitochondrial membrane potential, implying its protective role on mitochondrial function. In addition, d-fagomine activated the AMPK signaling pathway through LKB1, increased the expression of SIRT1 and PGC-1α, and attenuated the inhibitory effect on SIRT1 and PGC-1α activity caused by AMPK and SIRT1 inhibitor. d-Fagomine attenuated high glucose-induced oxidative stress in HUVECs through the AMPK/SIRT1/PGC-1α pathway.
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Affiliation(s)
- Bo-Bo Zhang
- College of Food Science and Engineering , Northwest A&F University , 712100 Yangling , P. R. China
| | - Cai-Feng Gao
- College of Food Science and Engineering , Northwest A&F University , 712100 Yangling , P. R. China
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39
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Saha M, Kumar S, Bukhari S, Balaji SA, Kumar P, Hindupur SK, Rangarajan A. AMPK-Akt Double-Negative Feedback Loop in Breast Cancer Cells Regulates Their Adaptation to Matrix Deprivation. Cancer Res 2018; 78:1497-1510. [PMID: 29339542 PMCID: PMC6033311 DOI: 10.1158/0008-5472.can-17-2090] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 11/17/2017] [Accepted: 01/10/2018] [Indexed: 12/11/2022]
Abstract
Cell detachment from the extracellular matrix triggers anoikis. Disseminated tumor cells must adapt to survive matrix deprivation, while still retaining the ability to attach at secondary sites and reinitiate cell division. In this study, we elucidate mechanisms that enable reversible matrix attachment by breast cancer cells. Matrix deprival triggered AMPK activity and concomitantly inhibited AKT activity by upregulating the Akt phosphatase PHLPP2. The resultant pAMPKhigh/pAktlow state was critical for cell survival in suspension, as PHLPP2 silencing also increased anoikis while impairing autophagy and metastasis. In contrast, matrix reattachment led to Akt-mediated AMPK inactivation via PP2C-α-mediated restoration of the pAkthigh/pAMPKlow state. Clinical specimens of primary and metastatic breast cancer displayed an Akt-associated gene expression signature, whereas circulating breast tumor cells displayed an elevated AMPK-dependent gene expression signature. Our work establishes a double-negative feedback loop between Akt and AMPK to control the switch between matrix-attached and matrix-detached states needed to coordinate cell growth and survival during metastasis.Significance: These findings reveal a molecular switch that regulates cancer cell survival during metastatic dissemination, with the potential to identify targets to prevent metastasis in breast cancer. Cancer Res; 78(6); 1497-510. ©2018 AACR.
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Affiliation(s)
- Manipa Saha
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bangalore, India
| | - Saurav Kumar
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bangalore, India
| | - Shoiab Bukhari
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bangalore, India
| | - Sai A Balaji
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bangalore, India
| | - Prashant Kumar
- Institute of Bioinformatics, International Technology Park, Whitefield, Bangalore, India
| | - Sravanth K Hindupur
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bangalore, India
| | - Annapoorni Rangarajan
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bangalore, India.
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40
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Zhou PT, Li B, Liu FR, Zhang MC, Wang Q, Li YY, Xu C, Liu YH, Yao Y, Li D. Metformin is associated with survival benefit in pancreatic cancer patients with diabetes: a systematic review and meta-analysis. Oncotarget 2018; 8:25242-25250. [PMID: 28445955 PMCID: PMC5421925 DOI: 10.18632/oncotarget.15692] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Accepted: 01/24/2017] [Indexed: 01/02/2023] Open
Abstract
Background Pancreatic cancer is a highly lethal disease with a poor prognosis while metformin has been associated with a decreased risk of pancreatic cancer. Although the benefit of metformin was observed for pancreatic cancer prevention, it is not clear whether it can also affect the survival of pancreatic cancer patients with type 2 diabetes mellitus. A systematic review and meta-analysis was conducted to assess the effect of metformin on the survival of pancreatic cancer patients with type 2 diabetes mellitus. Methods Two independent authors searched PubMed and Web of science up to 08/07/2016. We assessed studies for eligibility, extracted data, and examined their quality, with the primary outcome as overall survival. We used published hazard ratio (HR) available or estimated based on other survival data. We pooled the data and used a random-effect model to combine direct comparisons from included articles. We also investigated treatment effects by different countries, quality and the time of metformin initiation. RESULTS We found that there was a relative survival benefit associated with metformin treatment compared with non-metformin treatment in both overall survival (OS) ([HR] 0.84; 95% confidence interval [CI]: 0.73 – 0.96). These associations were also observed in subgroups of Asian countries and high quality articles. Conclusions Our results support the notion that metformin maybe the best anti-diabetic medicine of choice in patients with pancreatic cancer and concurrent type 2 diabetes mellitus. The perspectives of enhancing survival of pancreatic cancer patients with diabetes mellitus by the use of metformin deserve more attention in future research and clinical practice.
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Affiliation(s)
- Ping-Ting Zhou
- Department of Oncology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Bo Li
- Department of Bone Tumor Surgery, Changzheng Hospital, Second Military Medical University, Shanghai, China
| | - Fu-Rao Liu
- Department of Oncology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Mei-Chao Zhang
- Department of Oncology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Qian Wang
- Department of Oncology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yan-Yan Li
- Department of Oncology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Ci Xu
- Department of Oncology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yuan-Hua Liu
- Department of Chemotherapy, Nanjing Medical University Affiliated Cancer Hospital, Cancer Institute of Jiangsu Province, Nanjing, Jiangsu, China
| | - Yuan Yao
- Department of Radiation Oncology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Dong Li
- Department of Oncology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
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Compound C enhances tau phosphorylation at Serine396 via PI3K activation in an AMPK and rapamycin independent way in differentiated SH-SY5Y cells. Neurosci Lett 2018; 670:53-61. [DOI: 10.1016/j.neulet.2018.01.049] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 01/19/2018] [Accepted: 01/24/2018] [Indexed: 11/21/2022]
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42
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Miao X, Gu Z, Liu Y, Jin M, Lu Y, Gong Y, Li L, Li C. The glucagon-like peptide-1 analogue liraglutide promotes autophagy through the modulation of 5'-AMP-activated protein kinase in INS-1 β-cells under high glucose conditions. Peptides 2018; 100:127-139. [PMID: 28712893 DOI: 10.1016/j.peptides.2017.07.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 07/04/2017] [Accepted: 07/07/2017] [Indexed: 01/07/2023]
Abstract
Glucagon-like peptide-1 (GLP-1) is a potent therapeutic agent for the treatment of diabetes and has been proven to protect pancreatic β-cells from glucotoxicity; however, its mechanisms of action are not entirely understood. Autophagy is a dynamic lysosomal degradation process that can protect organisms against metabolic stress. Studies have shown that autophagy plays a protective role in the survival of pancreatic β-cells under high glucose conditions. In the present study, we explored the role of autophagy in GLP-1-induced protection of pancreatic β-cells exposed to high glucose. We demonstrated that the GLP-1 analogue liraglutide increased autophagy in rat INS-1 β-cells, and inhibition of autophagy abated the anti-apoptosis effect of liraglutide under high glucose conditions. Our results also showed that activation of 5'-AMP-activated protein kinase (AMPK) reduced liraglutide-induced autophagy enhancement and inhibited liraglutide-induced protection of INS-1 β-cells from high glucose. These data suggest that GLP-1 may protect β-cells from glucotoxicity through promoting autophagy by the modulation of AMPK. Deeper insight into the molecular mechanisms linking autophagy and GLP-1-induced β-cell protection may reveal novel therapeutic targets to preserve β-cell mass.
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Affiliation(s)
- Xinyu Miao
- Department of Geriatric Endocrinology, General Hospital of PLA, Beijing, China
| | - Zhaoyan Gu
- Department of Geriatric Endocrinology, General Hospital of PLA, Beijing, China
| | - Yu Liu
- Department of Geriatric Endocrinology, General Hospital of PLA, Beijing, China
| | - Mengmeng Jin
- Department of Geriatric Endocrinology, General Hospital of PLA, Beijing, China
| | - Yanhui Lu
- Department of Geriatric Endocrinology, General Hospital of PLA, Beijing, China
| | - Yanping Gong
- Department of Geriatric Endocrinology, General Hospital of PLA, Beijing, China
| | - Lin Li
- Department of Endocrinology, General Hospital of The PLA Rocket Force, Beijing, China
| | - Chunlin Li
- Department of Geriatric Endocrinology, General Hospital of PLA, Beijing, China.
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Chinese olive extract ameliorates hepatic lipid accumulation in vitro and in vivo by regulating lipid metabolism. Sci Rep 2018; 8:1057. [PMID: 29348600 PMCID: PMC5773498 DOI: 10.1038/s41598-018-19553-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 01/03/2018] [Indexed: 12/20/2022] Open
Abstract
Chinese olive contains plenty of polyphenols, which possess a wide range of biological actions. In this study, we aimed to investigate the role of the ethyl acetate fraction of Chinese olive fruit extract (CO-EtOAc) in the modulation of lipid accumulation in vitro and in vivo. In cellular studies, CO-EtOAc attenuated oleic acid-induced lipid accumulation; we then elucidated the molecular mechanisms of CO-EtOAc in FL83B mouse hepatocytes. CO-EtOAc suppressed the mRNA levels of fatty acid transporter genes (CD36 and FABP) and lipogenesis genes (SREBP-1c, FAS, and ACC1), but upregulated genes that govern lipolysis (HSL) and lipid oxidation (PPARα, CPT-1, and ACOX). Moreover, CO-EtOAc increased the protein expression of phosphorylated AMPK, ACC1, CPT-1, and PPARα, but downregulated the expression of mature SREBP-1c and FAS. AMPK plays an essential role in CO-EtOAc-mediated amelioration of lipid accumulation. Furthermore, we confirmed that CO-EtOAc significantly inhibited body weight gain, epididymal adipose tissue weight, and hepatic lipid accumulation via regulation of the expression of fatty acid transporter, lipogenesis, and fatty acid oxidation genes and proteins in C57BL/6 mice fed a 60% high-fat diet. Therefore, Chinese olive fruits may have the potential to improve the metabolic abnormalities associated with fatty liver under high fat challenge.
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Lukitasari M, Nugroho DA, Widodo N. Chlorogenic Acid: The Conceivable Chemosensitizer Leading to Cancer Growth Suppression. J Evid Based Integr Med 2018; 23:2515690X18789628. [PMID: 30051721 PMCID: PMC6073821 DOI: 10.1177/2515690x18789628] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 04/05/2018] [Accepted: 06/26/2018] [Indexed: 12/22/2022] Open
Abstract
New paradigm in cancer pathogenesis revealed that microenvironmental conditions significantly contribute to cancer. Hence, Warburg stated that cancer is a metabolic disease. Chlorogenic acid (CGA) is a polyphenol that is found abundantly in coffee. This compound has proven ability in ameliorating some metabolic diseases through various pathways. This article will elaborate the potency of CGA as a chemosensitizer in suppressing tumor growth through a metabolic pathway. AMPK pathway is the main cell metabolic pathway that is activated by CGA in some studies. Moreover, CGA inhibited EGFR/PI3K/mTOR, HIF, VEGF pathways and MAPK/ERK pathway that may suppress tumor cell growth. Furthermore, CGA induced intracellular DNA damage and topoisomerase I- and II-DNA complexes formation that plays a key role in apoptosis. Conclusively, based on the ability of CGA in activate and inhibit some important pathways in cancer metabolism, it may act as a chemosensitizing agent leading to cancer growth suppression.
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Affiliation(s)
- Mifetika Lukitasari
- Department of Nursing, Faculty of Medicine, Brawijaya University
- Brawijaya Cardiovascular Research Center, Faculty of Medicine, Brawijaya University, Malang, Indonesia
| | - Dwi Adi Nugroho
- Brawijaya Cardiovascular Research Center, Faculty of Medicine, Brawijaya University, Malang, Indonesia
| | - Nashi Widodo
- Brawijaya Cardiovascular Research Center, Faculty of Medicine, Brawijaya University, Malang, Indonesia
- Biology Department, Faculty of Mathematics and Sciences, Brawijaya University, Malang, Indonesia
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45
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Guillén C, Benito M. mTORC1 Overactivation as a Key Aging Factor in the Progression to Type 2 Diabetes Mellitus. Front Endocrinol (Lausanne) 2018; 9:621. [PMID: 30386301 PMCID: PMC6198057 DOI: 10.3389/fendo.2018.00621] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 09/27/2018] [Indexed: 01/06/2023] Open
Abstract
Type 2 Diabetes Mellitus (T2DM), a worldwide epidemics, is a progressive disease initially developing an insulin resistant state, with manifest pancreatic beta islet overwork and hyperinsulinemia. As the disease progresses, pancreatic β cells are overwhelmed and fails in their capacity to compensate insulin resistance. In addition, it is usually associated with other metabolic diseases such as hyperlipidemia, obesity and the metabolic syndrome. During the progression to T2DM there is a chronic activation of mTORC1 signaling pathway, which induces aging and acts as an endogenous inhibitor of autophagy. The complex 1 of mTOR (mTORC1) controls cell proliferation, cell growth as well as metabolism in a variety of cell types through a complex signaling network. Autophagy is involved in the recycling of cellular components for energy generation under nutrient deprivation, and serves as a complementary degradation system to the ubiquitin-proteasome pathway. Autophagy represents a protective mechanism for different cell types, including pancreatic β cells, and potentiates β cell survival across the progression to T2DM. Here, we focus our attention on the chronic overactivation of mTORC1 signaling pathway in β islets from prediabetics patients, making these cells more prone to trigger apoptosis upon several cellular stressors and allowing the progression from prediabetes to type 2 diabetes status.
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Affiliation(s)
- Carlos Guillén
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Complutense University of Madrid, Madrid, Spain
- Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM), Instituto de Salud Carlos III, Madrid, Spain
- *Correspondence: Carlos Guillén
| | - Manuel Benito
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Complutense University of Madrid, Madrid, Spain
- Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM), Instituto de Salud Carlos III, Madrid, Spain
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46
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Wang Z, Ka SO, Han YT, Bae EJ. Dihydropyranoaurone compound damaurone D inhibits LPS-induced inflammation and liver injury by inhibiting NF-κB and MAPK signaling independent of AMPK. Arch Pharm Res 2017; 41:314-323. [DOI: 10.1007/s12272-017-1001-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 12/14/2017] [Indexed: 12/25/2022]
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Iommarini L, Porcelli AM, Gasparre G, Kurelac I. Non-Canonical Mechanisms Regulating Hypoxia-Inducible Factor 1 Alpha in Cancer. Front Oncol 2017; 7:286. [PMID: 29230384 PMCID: PMC5711814 DOI: 10.3389/fonc.2017.00286] [Citation(s) in RCA: 153] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Accepted: 11/13/2017] [Indexed: 12/21/2022] Open
Abstract
Hypoxia-inducible factor 1 alpha (HIF-1α) orchestrates cellular adaptation to low oxygen and nutrient-deprived environment and drives progression to malignancy in human solid cancers. Its canonical regulation involves prolyl hydroxylases (PHDs), which in normoxia induce degradation, whereas in hypoxia allow stabilization of HIF-1α. However, in certain circumstances, HIF-1α regulation goes beyond the actual external oxygen levels and involves PHD-independent mechanisms. Here, we gather and discuss the evidence on the non-canonical HIF-1α regulation, focusing in particular on the consequences of mitochondrial respiratory complexes damage on stabilization of this pleiotropic transcription factor.
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Affiliation(s)
- Luisa Iommarini
- Dipartimento di Farmacia e Biotecnologie, Università di Bologna, Bologna, Italy
| | - Anna Maria Porcelli
- Dipartimento di Farmacia e Biotecnologie, Università di Bologna, Bologna, Italy
| | - Giuseppe Gasparre
- Dipartimento di Scienze Mediche e Chirurgiche, Università di Bologna, Bologna, Italy
| | - Ivana Kurelac
- Dipartimento di Scienze Mediche e Chirurgiche, Università di Bologna, Bologna, Italy
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48
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Huang J, Zhou Y, Wan B, Wang Q, Wan X. Green tea polyphenols alter lipid metabolism in the livers of broiler chickens through increased phosphorylation of AMP-activated protein kinase. PLoS One 2017; 12:e0187061. [PMID: 29073281 PMCID: PMC5658135 DOI: 10.1371/journal.pone.0187061] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 10/12/2017] [Indexed: 01/18/2023] Open
Abstract
Our previous results showed that green tea polyphenols (GTPs) significantly altered the expression of lipid-metabolizing genes in the liver of chickens. However, the underlying mechanism was not elucidated. In this study, we further characterized how GTPs influence AMP-activated protein kinase (AMPK) in the regulation of hepatic fat metabolism. Thirty-six male chickens were fed GTPs at a daily dose of 0, 80 or 160 mg/kg of body weight for 4 weeks. The results demonstrated that oral administration of GTPs significantly reduced hepatic lipid content and abdominal fat mass, enhanced the phosphorylation levels of AMPKα and ACACA, and altered the mRNA levels and enzymatic activities of lipid-metabolizing enzymes in the liver. These results suggested that the activation of AMPK is a potential mechanism by which GTPs regulate hepatic lipid metabolism in such a way that lipid synthesis is reduced and fat oxidation is stimulated.
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Affiliation(s)
- Jinbao Huang
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science and Technology, Anhui Agricultural University, Hefei, Anhui Province, People's Republic of China
- International Joint Research Laboratory of Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui Province, People's Republic of China
| | - Yibin Zhou
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science and Technology, Anhui Agricultural University, Hefei, Anhui Province, People's Republic of China
| | - Bei Wan
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science and Technology, Anhui Agricultural University, Hefei, Anhui Province, People's Republic of China
| | - Qiushi Wang
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science and Technology, Anhui Agricultural University, Hefei, Anhui Province, People's Republic of China
| | - Xiaochun Wan
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science and Technology, Anhui Agricultural University, Hefei, Anhui Province, People's Republic of China
- International Joint Research Laboratory of Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui Province, People's Republic of China
- * E-mail:
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49
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Abstract
In healthy individuals, metabolically quiescent T cells survey lymph nodes and peripheral tissues in search of cognate antigens. During infection, T cells that encounter cognate antigens are activated and - in a context-specific manner - proliferate and/or differentiate to become effector T cells. This process is accompanied by important changes in cellular metabolism (known as metabolic reprogramming). The magnitude and spectrum of metabolic reprogramming as it occurs in T cells in the context of acute infection ensure host survival. By contrast, altered T cell metabolism, and hence function, is also observed in various disease states, in which T cells actively contribute to pathology. In this Review, we introduce the idea that the spectrum of immune cell metabolic states can provide a basis for categorizing human diseases. Specifically, we first summarize the metabolic and interlinked signalling requirements of T cells responding to acute infection. We then discuss how metabolic reprogramming of T cells is linked to disease.
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50
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Bao W, Luo Y, Wang D, Li J, Wu X, Mei W. Sodium salicylate modulates inflammatory responses through AMP-activated protein kinase activation in LPS-stimulated THP-1 cells. J Cell Biochem 2017; 119:850-860. [PMID: 28661045 PMCID: PMC5724678 DOI: 10.1002/jcb.26249] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2016] [Accepted: 06/28/2017] [Indexed: 12/27/2022]
Abstract
Sodium salicylate (NaSal) is a nonsteroidal anti-inflammatory drug. The putative mechanisms for NaSal's pharmacologic actions include the inhibition of cyclooxygenases, platelet-derived thromboxane A2, and NF-κB signaling. Recent studies demonstrated that salicylate could activate AMP-activated protein kinase (AMPK), an energy sensor that maintains the balance between ATP production and consumption. The anti-inflammatory action of AMPK has been reported to be mediated by promoting mitochondrial biogenesis and fatty acid oxidation. However, the exact signals responsible for salicylate-mediated inflammation through AMPK are not well-understood. In the current study, we examined the potential effects of NaSal on inflammation-like responses of THP-1 monocytes to lipopolysaccharide (LPS) challenge. THP-1 cells were stimulated with or without 10 ug/mL LPS for 24 h in the presence or absence of 5 mM NaSal. Apoptosis was measured by flow cytometry using Annexin V/PI staining and by Western blotting for the Bcl-2 anti-apoptotic protein. Cell proliferation was detected by EdU incorporation and by Western blot analysis for proliferating cell nuclear antigen (PCNA). Secretion of pro-inflammatory cytokines (TNF-α, IL-1β, IL-6) was determined by enzyme-linked immunosorbent assay (ELISA). We observed that the activation of AMPK by NaSal was accompanied by induction of apoptosis, inhibition of cell proliferation, and increasing secretion of TNF-α and IL-1β. These effects were reversed by Compound C, an inhibitor of AMPK. In addition, NaSal/AMPK activation inhibited LPS-induced STAT3 phosphorylation, which was reversed by Compound C treatment. We conclude that AMPK activation is important for NaSal-mediated inflammation by inducing apoptosis, reducing cell proliferation, inhibiting STAT3 activity, and producing TNF-α and IL-1β.
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Affiliation(s)
- Weiwei Bao
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.,Department of Anesthesiology, Xinqiao Hospital, The Third Military Medical University, Chongqing, China
| | - Yaru Luo
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.,Department of Anesthesiology, Renmin Hospital of Wuhan University, Hubei Province, Wuhan, Hubei, China
| | - Dan Wang
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Jian Li
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.,Department of Anesthesiology, Shenzhen Second People's Hospital, Guangdong Province, Shenzhen, China
| | - Xi Wu
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Wei Mei
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
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