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Calado CRC. Bridging the gap between target-based and phenotypic-based drug discovery. Expert Opin Drug Discov 2024; 19:789-798. [PMID: 38747562 DOI: 10.1080/17460441.2024.2355330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 05/10/2024] [Indexed: 06/26/2024]
Abstract
INTRODUCTION The unparalleled progress in science of the last decades has brought a better understanding of the molecular mechanisms of diseases. This promoted drug discovery processes based on a target approach. However, despite the high promises associated, a critical decrease in the number of first-in-class drugs has been observed. AREAS COVERED This review analyses the challenges, advances, and opportunities associated with the main strategies of the drug discovery process, i.e. based on a rational target approach and on an empirical phenotypic approach. This review also evaluates how the gap between these two crossroads can be bridged toward a more efficient drug discovery process. EXPERT OPINION The critical lack of knowledge of the complex biological networks is leading to targets not relevant for the clinical context or to drugs that present undesired adverse effects. The phenotypic systems designed by considering available molecular mechanisms can mitigate these knowledge gaps. Associated with the expansion of the chemical space and other technologies, these designs can lead to more efficient drug discoveries. Technological and scientific knowledge should also be applied to identify, as early as possible, both drug targets and mechanisms of action, leading to a more efficient drug discovery pipeline.
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Affiliation(s)
- Cecília R C Calado
- ISEL-Instituto Superior de Engenharia de Lisboa, Instituto Politécnico de Lisboa, Lisboa, Portugal
- iBB - Institute for Bioengineering and Biosciences, i4HB - The Associate Laboratory Institute for Health and Bioeconomy, IST - Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
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2
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Antasouras G, Dakanalis A, Chrysafi M, Papadopoulou SK, Trifonidi I, Spanoudaki M, Alexatou O, Pritsa A, Louka A, Giaginis C. Could Insulin Be a Better Regulator of Appetite/Satiety Balance and Body Weight Maintenance in Response to Glucose Exposure Compared to Sucrose Substitutes? Unraveling Current Knowledge and Searching for More Appropriate Choices. Med Sci (Basel) 2024; 12:29. [PMID: 38921683 PMCID: PMC11205552 DOI: 10.3390/medsci12020029] [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: 04/13/2024] [Revised: 06/04/2024] [Accepted: 06/05/2024] [Indexed: 06/27/2024] Open
Abstract
BACKGROUND Insulin exerts a crucial impact on glucose control, cellular growing, function, and metabolism. It is partially modulated by nutrients, especially as a response to the intake of foods, including carbohydrates. Moreover, insulin can exert an anorexigenic effect when inserted into the hypothalamus of the brain, in which a complex network of an appetite/hunger control system occurs. The current literature review aims at thoroughly summarizing and scrutinizing whether insulin release in response to glucose exposure may be a better choice to control body weight gain and related diseases compared to the use of sucrose substitutes (SSs) in combination with a long-term, well-balanced diet. METHODS This is a comprehensive literature review, which was performed through searching in-depth for the most accurate scientific databases and applying effective and relevant keywords. RESULTS The insulin action can be inserted into the hypothalamic orexigenic/anorexigenic complex system, activating several anorexigenic peptides, increasing the hedonic aspect of food intake, and effectively controlling the human body weight. In contrast, SSs appear not to affect the orexigenic/anorexigenic complex system, resulting in more cases of uncontrolled body weight maintenance while also increasing the risk of developing related diseases. CONCLUSIONS Most evidence, mainly derived from in vitro and in vivo animal studies, has reinforced the insulin anorexigenic action in the hypothalamus of the brain. Simultaneously, most available clinical studies showed that SSs during a well-balanced diet either maintain or even increase body weight, which may indirectly be ascribed to the fact that they cannot cover the hedonic aspect of food intake. However, there is a strong demand for long-term longitudinal surveys to effectively specify the impact of SSs on human metabolic health.
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Affiliation(s)
- Georgios Antasouras
- Department of Food Science and Nutrition, School of Environment, University of Aegean, 81400 Lemnos, Greece; (G.A.); (M.C.); (O.A.); (A.L.)
| | - Antonios Dakanalis
- Department of Mental Health, Fondazione IRCCS San Gerardo dei Tintori, Via G.B. Pergolesi 33, 20900 Monza, Italy;
- Department of Medicine and Surgery, University of Milan Bicocca, Via Cadore 38, 20900 Monza, Italy
| | - Maria Chrysafi
- Department of Food Science and Nutrition, School of Environment, University of Aegean, 81400 Lemnos, Greece; (G.A.); (M.C.); (O.A.); (A.L.)
| | - Sousana K. Papadopoulou
- Department of Nutritional Sciences and Dietetics, School of Health Sciences, International Hellenic University, 57400 Thessaloniki, Greece; (S.K.P.); (M.S.); (A.P.)
| | - Ioulia Trifonidi
- Department of Clinical Biochemistry, KAT General Hospital, 14561 Athens, Greece;
| | - Maria Spanoudaki
- Department of Nutritional Sciences and Dietetics, School of Health Sciences, International Hellenic University, 57400 Thessaloniki, Greece; (S.K.P.); (M.S.); (A.P.)
| | - Olga Alexatou
- Department of Food Science and Nutrition, School of Environment, University of Aegean, 81400 Lemnos, Greece; (G.A.); (M.C.); (O.A.); (A.L.)
| | - Agathi Pritsa
- Department of Nutritional Sciences and Dietetics, School of Health Sciences, International Hellenic University, 57400 Thessaloniki, Greece; (S.K.P.); (M.S.); (A.P.)
| | - Aikaterini Louka
- Department of Food Science and Nutrition, School of Environment, University of Aegean, 81400 Lemnos, Greece; (G.A.); (M.C.); (O.A.); (A.L.)
| | - Constantinos Giaginis
- Department of Food Science and Nutrition, School of Environment, University of Aegean, 81400 Lemnos, Greece; (G.A.); (M.C.); (O.A.); (A.L.)
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Sun D, Luo G, Zhang Q, Wang M, Yang T, Wang Y, Pang J. Sub-chronic exposure to hexaconazole affects the lipid metabolism of rats through mTOR-PPAR-γ/SREBP1 signaling pathway mediated by oxidative stress. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2023; 197:105646. [PMID: 38072521 DOI: 10.1016/j.pestbp.2023.105646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 09/21/2023] [Accepted: 10/11/2023] [Indexed: 12/18/2023]
Abstract
Hexaconazole (Hex) is a widely used and high frequency detected triazole fungicide in agricultural products and environment which may pose potential toxicity to the nontargeted organisms. Hex had been reported to affect lipid homeostasis while the mechanism was undefined. This study aims to explore the characteristic lipidomic profiles and clarify the underlying signaling pathways of Hex-induced lipid metabolism disorder in rat liver. The results showed that sub-chronic exposure to environmental related concentrations of Hex caused histopathological changes, oxidative stress, fat accumulation, lipid biochemical parameter increase in rats. Moreover, the untargeted lipidomic analysis showed that the levels of TAG, PC, and PE and the pathway of glycerophospholipid metabolism were heavily altered by Hex. We further analyzed the lipid metabolism related genes and proteins which revealed that Hex exposure increased amount of lipogenesis by activating oxidative stress-mediated mTOR-PPAR-γ/SREBP1 signaling pathways. The imbalance of lipid homeostasis induced by Hex exposure might further lead to obesity, cardiovascular diseases (CVDs), and hyperlipidemia. Our results provided systematic and comprehensive evidence for the mechanism of Hex-induced lipid metabolism disorder at environmental concentrations and supplied a certain basis for its health risks assessment.
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Affiliation(s)
- Dali Sun
- The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Provincial Engineering Research Center of Ecological Food Innovation, School of Public Health, Guizhou Medical University, Guiyang 550025, China
| | - Guofei Luo
- The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Provincial Engineering Research Center of Ecological Food Innovation, School of Public Health, Guizhou Medical University, Guiyang 550025, China
| | - Qinghai Zhang
- The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Provincial Engineering Research Center of Ecological Food Innovation, School of Public Health, Guizhou Medical University, Guiyang 550025, China
| | - Min Wang
- The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Provincial Engineering Research Center of Ecological Food Innovation, School of Public Health, Guizhou Medical University, Guiyang 550025, China
| | - Tianming Yang
- The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Provincial Engineering Research Center of Ecological Food Innovation, School of Public Health, Guizhou Medical University, Guiyang 550025, China
| | - Yao Wang
- The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Provincial Engineering Research Center of Ecological Food Innovation, School of Public Health, Guizhou Medical University, Guiyang 550025, China
| | - Junxiao Pang
- College of Food Science and Engineering, Guiyang University, Guiyang 550005, China.
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Soriano-Baguet L, Grusdat M, Kurniawan H, Benzarti M, Binsfeld C, Ewen A, Longworth J, Bonetti L, Guerra L, Franchina DG, Kobayashi T, Horkova V, Verschueren C, Helgueta S, Gérard D, More TH, Henne A, Dostert C, Farinelle S, Lesur A, Gérardy JJ, Jäger C, Mittelbronn M, Sinkkonen L, Hiller K, Meiser J, Brenner D. Pyruvate dehydrogenase fuels a critical citrate pool that is essential for Th17 cell effector functions. Cell Rep 2023; 42:112153. [PMID: 36848289 DOI: 10.1016/j.celrep.2023.112153] [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: 04/05/2022] [Revised: 12/05/2022] [Accepted: 02/07/2023] [Indexed: 02/27/2023] Open
Abstract
Pyruvate dehydrogenase (PDH) is the central enzyme connecting glycolysis and the tricarboxylic acid (TCA) cycle. The importance of PDH function in T helper 17 (Th17) cells still remains to be studied. Here, we show that PDH is essential for the generation of a glucose-derived citrate pool needed for Th17 cell proliferation, survival, and effector function. In vivo, mice harboring a T cell-specific deletion of PDH are less susceptible to developing experimental autoimmune encephalomyelitis. Mechanistically, the absence of PDH in Th17 cells increases glutaminolysis, glycolysis, and lipid uptake in a mammalian target of rapamycin (mTOR)-dependent manner. However, cellular citrate remains critically low in mutant Th17 cells, which interferes with oxidative phosphorylation (OXPHOS), lipid synthesis, and histone acetylation, crucial for transcription of Th17 signature genes. Increasing cellular citrate in PDH-deficient Th17 cells restores their metabolism and function, identifying a metabolic feedback loop within the central carbon metabolism that may offer possibilities for therapeutically targeting Th17 cell-driven autoimmunity.
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Affiliation(s)
- Leticia Soriano-Baguet
- Experimental and Molecular Immunology, Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg; Immunology and Genetics, Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 7, Avenue des Hauts Fourneaux, Esch-sur-Alzette, Luxembourg
| | - Melanie Grusdat
- Experimental and Molecular Immunology, Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg; Immunology and Genetics, Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 7, Avenue des Hauts Fourneaux, Esch-sur-Alzette, Luxembourg
| | - Henry Kurniawan
- Experimental and Molecular Immunology, Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg; Immunology and Genetics, Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 7, Avenue des Hauts Fourneaux, Esch-sur-Alzette, Luxembourg
| | - Mohaned Benzarti
- Cancer Metabolism Group, Department of Cancer Research, Luxembourg Institute of Health, Luxembourg, Luxembourg; Faculty of Science, Technology, and Medicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Carole Binsfeld
- Experimental and Molecular Immunology, Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg; Immunology and Genetics, Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 7, Avenue des Hauts Fourneaux, Esch-sur-Alzette, Luxembourg
| | - Anouk Ewen
- Experimental and Molecular Immunology, Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg; Immunology and Genetics, Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 7, Avenue des Hauts Fourneaux, Esch-sur-Alzette, Luxembourg
| | - Joseph Longworth
- Experimental and Molecular Immunology, Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg; Immunology and Genetics, Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 7, Avenue des Hauts Fourneaux, Esch-sur-Alzette, Luxembourg
| | - Lynn Bonetti
- Experimental and Molecular Immunology, Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg; Immunology and Genetics, Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 7, Avenue des Hauts Fourneaux, Esch-sur-Alzette, Luxembourg
| | - Luana Guerra
- Experimental and Molecular Immunology, Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg; Immunology and Genetics, Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 7, Avenue des Hauts Fourneaux, Esch-sur-Alzette, Luxembourg
| | - Davide G Franchina
- Experimental and Molecular Immunology, Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg; Immunology and Genetics, Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 7, Avenue des Hauts Fourneaux, Esch-sur-Alzette, Luxembourg
| | - Takumi Kobayashi
- Experimental and Molecular Immunology, Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg; Immunology and Genetics, Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 7, Avenue des Hauts Fourneaux, Esch-sur-Alzette, Luxembourg
| | - Veronika Horkova
- Experimental and Molecular Immunology, Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg; Immunology and Genetics, Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 7, Avenue des Hauts Fourneaux, Esch-sur-Alzette, Luxembourg
| | - Charlène Verschueren
- Experimental and Molecular Immunology, Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg; Immunology and Genetics, Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 7, Avenue des Hauts Fourneaux, Esch-sur-Alzette, Luxembourg
| | - Sergio Helgueta
- Luxembourg Center of Neuropathology, 3555 Dudelange, Luxembourg; Epigenetics Team, Systems Biology Group, Department of Life Sciences and Medicine, University of Luxembourg, Belvaux, Luxembourg
| | - Deborah Gérard
- Epigenetics Team, Systems Biology Group, Department of Life Sciences and Medicine, University of Luxembourg, Belvaux, Luxembourg
| | - Tushar H More
- Department of Bioinformatics and Biochemistry, Braunschweig Integrated Center of Systems Biology, Technische Universität Braunschweig, Rebenring 56, 38106 Braunschweig, Germany
| | - Antonia Henne
- Department of Bioinformatics and Biochemistry, Braunschweig Integrated Center of Systems Biology, Technische Universität Braunschweig, Rebenring 56, 38106 Braunschweig, Germany
| | - Catherine Dostert
- Experimental and Molecular Immunology, Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg; Immunology and Genetics, Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 7, Avenue des Hauts Fourneaux, Esch-sur-Alzette, Luxembourg
| | - Sophie Farinelle
- Experimental and Molecular Immunology, Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg; Immunology and Genetics, Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 7, Avenue des Hauts Fourneaux, Esch-sur-Alzette, Luxembourg
| | - Antoine Lesur
- Metabolomics Platform, Department of Cancer Research, Luxembourg Institute of Health, Luxembourg, Luxembourg
| | - Jean-Jacques Gérardy
- Luxembourg Center of Neuropathology, 3555 Dudelange, Luxembourg; National Center of Pathology, Laboratoire National de Santé (LNS), Dudelange, Luxembourg
| | - Christian Jäger
- Luxembourg Center for Systems Biomedicine, University of Luxembourg, 4362 Esch-sur-Alzette, Luxembourg
| | - Michel Mittelbronn
- Faculty of Science, Technology, and Medicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg; Luxembourg Center of Neuropathology, 3555 Dudelange, Luxembourg; National Center of Pathology, Laboratoire National de Santé (LNS), Dudelange, Luxembourg; Luxembourg Center for Systems Biomedicine, University of Luxembourg, 4362 Esch-sur-Alzette, Luxembourg; Department of Life Sciences and Medicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg; Department of Cancer Research, Luxembourg Institute of Health, 1526 Luxembourg, Luxembourg
| | - Lasse Sinkkonen
- Epigenetics Team, Systems Biology Group, Department of Life Sciences and Medicine, University of Luxembourg, Belvaux, Luxembourg
| | - Karsten Hiller
- Department of Bioinformatics and Biochemistry, Braunschweig Integrated Center of Systems Biology, Technische Universität Braunschweig, Rebenring 56, 38106 Braunschweig, Germany
| | - Johannes Meiser
- Cancer Metabolism Group, Department of Cancer Research, Luxembourg Institute of Health, Luxembourg, Luxembourg; Metabolomics Platform, Department of Cancer Research, Luxembourg Institute of Health, Luxembourg, Luxembourg
| | - Dirk Brenner
- Experimental and Molecular Immunology, Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg; Immunology and Genetics, Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 7, Avenue des Hauts Fourneaux, Esch-sur-Alzette, Luxembourg; Odense Research Center for Anaphylaxis, Department of Dermatology and Allergy Center, Odense University Hospital, University of Southern Denmark, Odense, Denmark.
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Structure-based discovery and in vitro validation of inhibitors of chloride intracellular channel 4 protein. Comput Struct Biotechnol J 2022; 21:688-701. [PMID: 36659928 PMCID: PMC9826898 DOI: 10.1016/j.csbj.2022.12.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 12/22/2022] [Accepted: 12/23/2022] [Indexed: 12/25/2022] Open
Abstract
The use of computer-aided methods have continued to propel accelerated drug discovery across various disease models, interestingly allowing the specific inhibition of pathogenic targets. Chloride Intracellular Channel Protein 4 (CLIC4) is a novel class of intracellular ion channel highly implicated in tumor and vascular biology. It regulates cell proliferation, apoptosis and angiogenesis; and is involved in multiple pathologic signaling pathways. Absence of specific inhibitors however impedes its advancement to translational research. Here, we integrate structural bioinformatics and experimental research approaches for the discovery and validation of small-molecule inhibitors of CLIC4. High-affinity allosteric binders were identified from a library of 1615 Food and Drug Administration (FDA)-approved drugs via a high-performance computing-powered blind-docking approach, resulting in the selection of amphotericin B and rapamycin. NMR assays confirmed the binding and conformational disruptive effects of both drugs while they also reversed stress-induced membrane translocation of CLIC4 and inhibited endothelial cell migration. Structural and dynamics simulation studies further revealed that the inhibitory mechanisms of these compounds were hinged on the allosteric modulation of the catalytic glutathione (GSH)-like site loop and the extended catalytic β loop which may elicit interference with the catalytic activities of CLIC4. Structure-based insights from this study provide the basis for the selective targeting of CLIC4 to treat the associated pathologies.
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Key Words
- A9C, 9-Anthracenecarboxylic acid
- AMPhB, Amphotericin B
- Ad, Adenovirus
- Allosteric inhibition
- Bad, BCL2 associated agonist of cell death
- Bcl-2, B-cell lymphoma 2
- Bcl-xL, B-cell lymphoma-extra large
- CDK, Cyclin-dependent kinases
- CLIC, Chloride intracellular channel protein
- Chloride intracellular channel protein 4
- Computational high-throughput screening
- DAPI, 4′,6-diamidino-2-phenylindole
- DIDS, 4,4′-Diisothiocyano-2,2′-stilbenedisulfonic acid
- DMSO, Dimethyl sulfoxide
- DOPE, Discrete optimized protein energy
- GPU, Graphics Processing Unit
- GSH-like catalytic site
- GST, glutathione S-transferases
- GUI, Graphical User Interface
- HEPES, (4-(2-hydroxyethyl)− 1-piperazineethanesulfonic acid;
- HIF, Hypoxia-inducible factor
- HSQC, Heteronuclear single quantum coherence spectroscopy
- HUVEC, Human umbilical vein endothelial cells
- IKKβ, Inhibitor of nuclear kappa-B-kinase subunit beta
- JNK, c-Jun N-terminal kinase
- MKK6, Mitogen-activated protein kinase kinase-6
- MOI, Multiplicity of infection
- NF-κB, Nuclear factor kappa-light-chain-enhancer of activated B cells
- NMR, Nuclear magnetic resonance
- NPT, The constant-temperature, constant-pressure ensemble
- NaCL, Sodium chloride
- Nuclear magnetic resonance
- PAH, Pulmonary arterial hypertension
- RAPA, Rapamycin
- SASA, Solvent accessible surface area
- SEK1, Dual specificity mitogen-activated protein kinase kinase 4
- Smad, Suppressor of Mothers against Decapentaplegic
- Structure-based drug discovery
- TEV, Tobacco etch virus
- TIP3P, Transferable intermolecular potential 3 P
- TROSY, Transverse relaxation optimized spectroscopy
- UCSF, University of California, San Francisco
- VEGF, Vascular endothelial growth factor
- p38, Mitogen activated protein kinases
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Su R, Wei X, Wei Q, Lu D, Lin Z, Wang S, Shao C, Xu X. Extrahepatic organs in the development of non-alcoholic fatty liver disease in liver transplant patients. Hepatobiliary Surg Nutr 2022; 11:400-411. [PMID: 35693397 PMCID: PMC9186206 DOI: 10.21037/hbsn-20-568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 09/23/2020] [Indexed: 08/30/2023]
Abstract
BACKGROUND AND OBJECTIVE Non-alcoholic fatty liver disease (NAFLD) is highly prevalent in patients who undergo liver transplantation (LT). Whereas there is huge data on NAFLD, little is known about NAFLD in LT. In this review, we aim to explore extrahepatic organs and their potential mechanisms in the development of NAFLD in LT patients and discuss current limitations in preclinical and clinical scenarios with suggestions for future study. METHODS The following keywords, such as NAFLD, NASH, liver transplant, therapy, pathogenesis and biomarkers, were set for literature retrieval. The articles which were published articles in English till 25th June 2020 in PubMed database were included, and there is no limit for the study design type. KEY CONTENT AND FINDINGS Following LT, there are significant shifts in the microbiota and farnesoid X receptor may be a potential therapeutic target for NAFLD in LT settings. The roles of probiotics and diet on NALFD remain inconclusive in LT background. Nevertheless, the adipokines and cytokines disorder and local insulin resistance of adipose tissue may contribute to NAFLD process. Bariatric surgeries are promising in controlling de novo and recurrent NAFLD with significant reduction in abdominal adipose tissue, despite the optimal timing is inconclusive in LT cases. Furthermore, circumstantial evidence indicates that miRNA-33a may function as a mediator bridging sarcopenia and NAFLD of post-LT. β-Hydroxy-β-Methyl-Butyrate treatment could improve muscle status in graft recipients and shows protective potential for NAFLD in LT settings. CONCLUSIONS Gut, adipose tissue and muscle are intricately intertwined in promoting NAFLD in LT cases. Further animal studies are needed to deepen our understanding of mechanisms in multi-organ crosstalk. High quality clinical trials are warrant for making guidelines and developing management strategies on NAFLD after LT.
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Affiliation(s)
- Renyi Su
- Department of Hepatobiliary and Pancreatic Surgery, Affiliated Hangzhou First People’s Hospital, Zhejiang University School of Medicine, Hangzhou, China
- NHC Key Laboratory of Combined Multi-Organ Transplantation, Hangzhou, China
| | - Xuyong Wei
- Department of Hepatobiliary and Pancreatic Surgery, Affiliated Hangzhou First People’s Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Qiang Wei
- Department of Hepatobiliary and Pancreatic Surgery, Affiliated Hangzhou First People’s Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Di Lu
- NHC Key Laboratory of Combined Multi-Organ Transplantation, Hangzhou, China
| | - Zuyuan Lin
- NHC Key Laboratory of Combined Multi-Organ Transplantation, Hangzhou, China
| | - Shuo Wang
- Department of Hepatobiliary and Pancreatic Surgery, Shu Lan Hospital, Shu Lan International Medical College of Zhejiang Shuren University, Hangzhou, China
| | - Chuxiao Shao
- Department of Hepatobiliary and Pancreatic Surgery, Affiliated Lishui Hospital, Zhejiang University School of Medicine, Lishui, China
| | - Xiao Xu
- Department of Hepatobiliary and Pancreatic Surgery, Affiliated Hangzhou First People’s Hospital, Zhejiang University School of Medicine, Hangzhou, China
- NHC Key Laboratory of Combined Multi-Organ Transplantation, Hangzhou, China
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Peng Y, Wang Y, Zhou C, Mei W, Zeng C. PI3K/Akt/mTOR Pathway and Its Role in Cancer Therapeutics: Are We Making Headway? Front Oncol 2022; 12:819128. [PMID: 35402264 PMCID: PMC8987494 DOI: 10.3389/fonc.2022.819128] [Citation(s) in RCA: 151] [Impact Index Per Article: 75.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Accepted: 03/04/2022] [Indexed: 12/12/2022] Open
Abstract
Cancer is a severe public health issue that is a leading cause of mortality globally. It is also an impediment to improving life expectancy worldwide. Furthermore, the global burden of cancer incidence and death is continuously growing. Current therapeutic options are insufficient for patients, and tumor complexity and heterogeneity necessitate customized medicine or targeted therapy. It is critical to identify potential cancer therapeutic targets. Aberrant activation of the PI3K/AKT/mTOR pathway has a significant role in carcinogenesis. This review summarized oncogenic PI3K/Akt/mTOR pathway alterations in cancer and various cancer hallmarks associated with the PI3K/AKT/mTOR pathway, such as cell proliferation, autophagy, apoptosis, angiogenesis, epithelial-to-mesenchymal transition (EMT), and chemoresistance. Importantly, this review provided recent advances in PI3K/AKT/mTOR inhibitor research. Overall, an in-depth understanding of the association between the PI3K/AKT/mTOR pathway and tumorigenesis and the development of therapies targeting the PI3K/AKT/mTOR pathway will help make clinical decisions.
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Affiliation(s)
- Yan Peng
- Department of Obstetrics, Longhua District Central Hospital, Shenzhen, China
| | - Yuanyuan Wang
- Xianning Medical College, Hubei University of Science and Technology, Xianning, China
| | - Cheng Zhou
- Department of Medical Laboratory, Shenzhen Longhua District Central Hospital, Guangdong Medical University, Shenzhen, China
| | - Wuxuan Mei
- Xianning Medical College, Hubei University of Science and Technology, Xianning, China
| | - Changchun Zeng
- Department of Medical Laboratory, Shenzhen Longhua District Central Hospital, Guangdong Medical University, Shenzhen, China
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Zhang X, Mao M, Zuo Z. Palmitate Induces Mitochondrial Energy Metabolism Disorder and Cellular Damage via the PPAR Signaling Pathway in Diabetic Cardiomyopathy. Diabetes Metab Syndr Obes 2022; 15:2287-2299. [PMID: 35936050 PMCID: PMC9355343 DOI: 10.2147/dmso.s360931] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Accepted: 06/28/2022] [Indexed: 01/13/2023] Open
Abstract
PURPOSE To establish an in vitro lipotoxicity model with mouse cardiomyocytes (MCMs) and investigate the molecular mechanism of the peroxisome proliferator-activated receptors (PPAR) signaling on mitochondrial energy metabolism disorder and cellular injury in diabetic cardiomyopathy (DCM). METHODS Gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses were performed on the differentially expressed genes (DEGs) of DCM. CCK-8 method was used to detect the proliferation inhibition effect of palmitate (PA) on MCMs. Oil red O staining and mRNA levels of CD36 were used to verify intracellular lipid accumulation. DCFH-DA method was used to determine the content of intracellular reactive oxygen species (ROS), and ATP levels were detected by the ATP Detection Kit. Transmission electron microscope (TEM) was used to observe the mitochondrial structure. Western blot was used to detect the expression levels of PPARα, PPARγ, P-mTOR, mTOR, PGC-1α, UCP2, and BNP. In addition, the expression of PPARγ was also detected by cellular immunofluorescence staining. BNP levels were detected by qRT-PCR and the ELISA Kit. RESULTS KEGG pathway analysis combined with GO analysis has shown that PPAR signaling played a significant regulatory role in mitochondrial biogenesis and fatty acid metabolism in DCM. Then, MCMs stimulated with PA for 24 h were selected as an in vitro lipotoxicity model. PA decreased cell viability, cell membrane shrinkage, and lipid accumulation. Meanwhile, PA-induced increase in cellular ROS led to ATP generation reduction and mitochondrial damage. Furthermore, the expression levels of p-mTOR- PPARα/γ were decreased, and the expressions of PGC-1α and UCP2 were increased. The levels of BNP were elevated, demonstrating PA impaired cardiomyocytes. CONCLUSION Mitochondrial energy metabolism obstacle and cell injury appeared in cardiac lipotoxicity of DCM, associated with lipid accumulation and increased ROS, indicating a crosstalk with the PPAR pathway mediated mechanism.
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Affiliation(s)
- Xianyu Zhang
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, People’s Republic of China
| | - Min Mao
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, People’s Republic of China
| | - Zhong Zuo
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, People’s Republic of China
- Correspondence: Zhong Zuo, Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, No. 1, Medical College Road, Yuzhong District, Chongqing, 400016, People’s Republic of China, Email
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9
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Pietropaolo S, Marsicano G. The role of the endocannabinoid system as a therapeutic target for autism spectrum disorder: Lessons from behavioral studies on mouse models. Neurosci Biobehav Rev 2021; 132:664-678. [PMID: 34813825 DOI: 10.1016/j.neubiorev.2021.11.031] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 11/02/2021] [Accepted: 11/19/2021] [Indexed: 12/17/2022]
Abstract
Recent years have seen an impressive amount of research devoted to understanding the etiopathology of Autism Spectrum Disorder (ASD) and developing therapies for this syndrome. Because of the lack of biomarkers of ASD, this work has been largely based on the behavioral characterization of rodent models, based on a multitude of genetic and environmental manipulations. Here we highlight how the endocannabinoid system (ECS) has recently emerged within this context of mouse behavioral studies as an etiopathological factor in ASD and a valid potential therapeutic target. We summarize the most recent results showing alterations of the ECS in rodent models of ASD, and demonstrating ASD-like behaviors in mice with altered ECS, induced either by genetic or pharmacological manipulations. We also give a critical overview of the most relevant advances in designing treatments and novel mouse models for ASD targeting the ECS, highlighting the relevance of thorough and innovative behavioral approaches to investigate the mechanisms acting underneath the complex features of ASD.
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Affiliation(s)
| | - Giovanni Marsicano
- INSERM, U1215 NeuroCentre Magendie, 146 rue Léo Saignat, 33077, Bordeaux Cedex, France
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10
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Devilliers M, Garrido D, Poidevin M, Rubin T, Le Rouzic A, Montagne J. Differential metabolic sensitivity of insulin-like-response- and TORC1-dependent overgrowth in Drosophila fat cells. Genetics 2021; 217:1-12. [PMID: 33683355 DOI: 10.1093/genetics/iyaa010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 11/02/2020] [Indexed: 12/19/2022] Open
Abstract
Glycolysis and fatty acid (FA) synthesis directs the production of energy-carrying molecules and building blocks necessary to support cell growth, although the absolute requirement of these metabolic pathways must be deeply investigated. Here, we used Drosophila genetics and focus on the TOR (Target of Rapamycin) signaling network that controls cell growth and homeostasis. In mammals, mTOR (mechanistic-TOR) is present in two distinct complexes, mTORC1 and mTORC2; the former directly responds to amino acids and energy levels, whereas the latter sustains insulin-like-peptide (Ilp) response. The TORC1 and Ilp signaling branches can be independently modulated in most Drosophila tissues. We show that TORC1 and Ilp-dependent overgrowth can operate independently in fat cells and that ubiquitous over-activation of TORC1 or Ilp signaling affects basal metabolism, supporting the use of Drosophila as a powerful model to study the link between growth and metabolism. We show that cell-autonomous restriction of glycolysis or FA synthesis in fat cells retrains overgrowth dependent on Ilp signaling but not TORC1 signaling. Additionally, the mutation of FASN (Fatty acid synthase) results in a drop in TORC1 but not Ilp signaling, whereas, at the cell-autonomous level, this mutation affects none of these signals in fat cells. These findings thus reveal differential metabolic sensitivity of TORC1- and Ilp-dependent growth and suggest that cell-autonomous metabolic defects might elicit local compensatory pathways. Conversely, enzyme knockdown in the whole organism results in animal death. Importantly, our study weakens the use of single inhibitors to fight mTOR-related diseases and strengthens the use of drug combination and selective tissue-targeting.
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Affiliation(s)
- Maelle Devilliers
- Institute for Integrative Biology of the Cell (I2BC), CNRS, Université Paris-Saclay, CEA, F-91190 Gif-sur-Yvette, France
| | - Damien Garrido
- Institute for Integrative Biology of the Cell (I2BC), CNRS, Université Paris-Saclay, CEA, F-91190 Gif-sur-Yvette, France
| | - Mickael Poidevin
- Institute for Integrative Biology of the Cell (I2BC), CNRS, Université Paris-Saclay, CEA, F-91190 Gif-sur-Yvette, France
| | - Thomas Rubin
- Institute for Integrative Biology of the Cell (I2BC), CNRS, Université Paris-Saclay, CEA, F-91190 Gif-sur-Yvette, France
| | - Arnaud Le Rouzic
- Laboratoire Evolution, Génomes, Comportement et Ecologie, CNRS, Université Paris-Saclay, UMR 9191, F-91190 Gif-sur-Yvette, France
| | - Jacques Montagne
- Institute for Integrative Biology of the Cell (I2BC), CNRS, Université Paris-Saclay, CEA, F-91190 Gif-sur-Yvette, France
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Inhibition of Fibrotic Contraction by Sirolimus (Rapamycin) in an Ex Vivo Model of Thyroid Eye Disease. Ophthalmic Plast Reconstr Surg 2021; 37:366-371. [PMID: 33237667 DOI: 10.1097/iop.0000000000001876] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Thyroid eye disease (TED) is characterized by orbital inflammation and complicated by extraocular muscle fibrosis. Treatment with rapamycin/sirolimus has been reported to improve ocular motility and disease manifestations in TED. Whether this resulted from a primary antifibrotic effect on fibroblasts or was secondary to immune-suppression is unclear. METHODS In vitro contractility studies of primary orbital fibroblasts. Cells from patients with TED and controls were treated with rapamycin [mechanistic target of rapamycin an (mTOR) inhibitor] and MHY1485 (an mTOR stimulator) as well as inhibitors upstream in the same signaling cascade (saracatinib and befatinib). RESULTS At concentrations consistent with the therapeutic dosing range in humans, rapamycin/sirolimus significantly reduces fibrosis in orbital fibroblasts from TED patients and controls in vitro. This effect is separate from, and in addition to, its immune suppressive effect. mTOR-driven fibrotic activity is greater in TED-derived fibroblasts and can be blocked also upstream of mTOR by inhibition of src. There was no adverse effect on cell survival. CONCLUSION The authors present evidence for a direct antifibrotic effect of rapamycin/sirolimus in primary orbital fibroblasts. Targeting mTOR signaling presents a further and adjunctive treatment of TED alongside other immune-suppressive agents. By acting downstream of IGF1-R, sirolimus may offer a cost-effective alternative to teprotumumab therapy. Clinical case reports, now supplemented by this in vitro evidence, support the initiation of a clinical trial to treat the fibrotic sequelae of TED with this already-approved agent. Such an "off-the-shelf" therapy is a welcome prospect for TED treatment, particularly one available at a low price.
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12
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Chang GR, Hou PH, Wang CM, Wu CF, Su HK, Liao HJ, Chen TP. Chronic everolimus treatment of high-fat diet mice leads to a reduction in obesity but impaired glucose tolerance. Pharmacol Res Perspect 2021; 9:e00732. [PMID: 33715287 PMCID: PMC7955951 DOI: 10.1002/prp2.732] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 01/21/2021] [Accepted: 01/27/2021] [Indexed: 12/13/2022] Open
Abstract
Everolimus, which inhibits mTOR kinase activity and is clinically used in graft rejection treatment, may have a two‐sided influence on metabolic syndrome; its role in obesity and hyperglycemic in animals and humans, however, has been explored insufficiently. This study further determined how continual everolimus treatment affects glucose homeostasis and body weight control in C57BL6/J mice with obesity. An obesity mouse model was developed by administering a high‐fat diet (HFD) to C57BL6/J mice over 12 weeks. The experimental group, while continuing their HFD consumption, were administered everolimus daily for 8 weeks. Metabolic parameters, glucose tolerance, fatty liver score, endocrine profile, insulin sensitivity index (ISI), insulin resistance (IR) index, and Akt phosphorylation, GLUT4, TNF‐α, and IL‐1 levels were measured in vivo. Compared with the control group, the everolimus group gained less body weight and had smaller adipocytes and lower fat pad weight; triglyceride (serum and hepatic), patatin‐like phospholipase domain‐containing 3, and fatty acid synthase levels; fatty liver scores; and glucose tolerance test values—all despite consuming more food. However, the everolimus group exhibited decreased ISI and muscle Akt phosphorylation and GLUT4 expression as well as impaired glucose tolerance and serum TNF‐α and IL‐1β levels—even when insulin levels were high. In conclusion, continual everolimus treatment may lead to diabetes with glucose intolerance and IR.
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Affiliation(s)
- Geng-Ruei Chang
- Department of Veterinary Medicine, National Chiayi University, Chiayi, Taiwan
| | - Po-Hsun Hou
- Department of Psychiatry, Taichung Veterans General Hospital, Taichung, Taiwan.,Faculty of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Chao-Min Wang
- Department of Veterinary Medicine, National Chiayi University, Chiayi, Taiwan
| | - Ching-Feng Wu
- Division of Thoracic and Cardiovascular Surgery, Department of Surgery, Chang Gung University, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Huang-Kai Su
- Department of Veterinary Medicine, National Chiayi University, Chiayi, Taiwan
| | - Huei-Jyuan Liao
- Department of Veterinary Medicine, National Chiayi University, Chiayi, Taiwan
| | - To-Pang Chen
- Division of Endocrinology and Metabolism, Show Chwan Memorial Hospital, Changhua, Taiwan
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13
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Fachi JL, Pral LP, dos Santos JAC, Codo AC, de Oliveira S, Felipe JS, Zambom FFF, Câmara NOS, Vieira PMMM, Colonna M, Vinolo MAR. Hypoxia enhances ILC3 responses through HIF-1α-dependent mechanism. Mucosal Immunol 2021; 14:828-841. [PMID: 33446906 PMCID: PMC8221997 DOI: 10.1038/s41385-020-00371-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 12/08/2020] [Accepted: 12/08/2020] [Indexed: 02/04/2023]
Abstract
Group 3 innate lymphoid cells (ILC3) have a prominent role in the maintenance of intestine mucosa homeostasis. The hypoxia-inducible factor (HIF) is an important modulator of immune cell activation and a key mechanism for cellular adaptation to oxygen deprivation. However, its role on ILC3 is not well known. In this study, we investigated how a hypoxic environment modulates ILC3 response and the subsequent participation of HIF-1 signaling in this process. We found increased proliferation and activation of intestinal ILC3 at low oxygen levels, a response that was phenocopied when HIF-1α was chemically stabilized and was reversed when HIF-1 was blocked. The increased activation of ILC3 relied on a HIF-1α-dependent transcriptional program, but not on mTOR-signaling or a switch to glycolysis. HIF-1α deficiency in RORyt compartment resulted in impaired IL-17 and IL-22 production by ILC3 in vivo, which reflected in a lower expression of their target genes in the intestinal epithelium and an increased susceptibility to Clostridiodes difficile infection. Taken together, our results show that HIF-1α activation in intestinal ILC3 is relevant for their functions in steady state and infectious conditions.
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Affiliation(s)
- J. L. Fachi
- grid.411087.b0000 0001 0723 2494Laboratory of Immunoinflammation, Department of Genetics, Evolution, Microbiology and Immunology, Institute of Biology, University of Campinas, Campinas, Brazil ,grid.4367.60000 0001 2355 7002Department of Pathology and Immunology, Washington University School of Medicine, Saint Louis, MO USA
| | - L. P. Pral
- grid.411087.b0000 0001 0723 2494Laboratory of Immunoinflammation, Department of Genetics, Evolution, Microbiology and Immunology, Institute of Biology, University of Campinas, Campinas, Brazil
| | - J. A. C. dos Santos
- grid.411087.b0000 0001 0723 2494Laboratory of Immunoinflammation, Department of Genetics, Evolution, Microbiology and Immunology, Institute of Biology, University of Campinas, Campinas, Brazil
| | - A. C. Codo
- grid.411087.b0000 0001 0723 2494Laboratory of Immunometabolism, Department of Genetics and Evolution, Microbiology and Immunology, Institute of Biology, University of Campinas, Campinas, Brazil
| | - S. de Oliveira
- grid.411087.b0000 0001 0723 2494Laboratory of Immunoinflammation, Department of Genetics, Evolution, Microbiology and Immunology, Institute of Biology, University of Campinas, Campinas, Brazil
| | - J. S. Felipe
- grid.411087.b0000 0001 0723 2494Laboratory of Immunoinflammation, Department of Genetics, Evolution, Microbiology and Immunology, Institute of Biology, University of Campinas, Campinas, Brazil
| | - F. F. F. Zambom
- grid.11899.380000 0004 1937 0722Renal Division, Department of Clinical Medicine, Faculty of Medicine, University of São Paulo, São Paulo, Brazil
| | - N. O. S. Câmara
- grid.11899.380000 0004 1937 0722Renal Division, Department of Clinical Medicine, Faculty of Medicine, University of São Paulo, São Paulo, Brazil ,grid.11899.380000 0004 1937 0722Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - P. M. M. M. Vieira
- grid.411087.b0000 0001 0723 2494Laboratory of Immunometabolism, Department of Genetics and Evolution, Microbiology and Immunology, Institute of Biology, University of Campinas, Campinas, Brazil ,Experimental Medicine Research Cluster, Campinas, Brazil ,grid.411087.b0000 0001 0723 2494Obesity and Comorbolities Research Center (OCRC), University of Campinas, Campinas, Brazil
| | - M. Colonna
- grid.4367.60000 0001 2355 7002Department of Pathology and Immunology, Washington University School of Medicine, Saint Louis, MO USA
| | - M. A. R. Vinolo
- grid.411087.b0000 0001 0723 2494Laboratory of Immunoinflammation, Department of Genetics, Evolution, Microbiology and Immunology, Institute of Biology, University of Campinas, Campinas, Brazil ,Experimental Medicine Research Cluster, Campinas, Brazil ,grid.411087.b0000 0001 0723 2494Obesity and Comorbolities Research Center (OCRC), University of Campinas, Campinas, Brazil
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Pignatti C, D’Adamo S, Stefanelli C, Flamigni F, Cetrullo S. Nutrients and Pathways that Regulate Health Span and Life Span. Geriatrics (Basel) 2020; 5:geriatrics5040095. [PMID: 33228041 PMCID: PMC7709628 DOI: 10.3390/geriatrics5040095] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 11/10/2020] [Accepted: 11/17/2020] [Indexed: 02/07/2023] Open
Abstract
Both life span and health span are influenced by genetic, environmental and lifestyle factors. With the genetic influence on human life span estimated to be about 20–25%, epigenetic changes play an important role in modulating individual health status and aging. Thus, a main part of life expectance and healthy aging is determined by dietary habits and nutritional factors. Excessive or restricted food consumption have direct effects on health status. Moreover, some dietary interventions including a reduced intake of dietary calories without malnutrition, or a restriction of specific dietary component may promote health benefits and decrease the incidence of aging-related comorbidities, thus representing intriguing potential approaches to improve healthy aging. However, the relationship between nutrition, health and aging is still not fully understood as well as the mechanisms by which nutrients and nutritional status may affect health span and longevity in model organisms. The broad effect of different nutritional conditions on health span and longevity occurs through multiple mechanisms that involve evolutionary conserved nutrient-sensing pathways in tissues and organs. These pathways interacting each other include the evolutionary conserved key regulators mammalian target of rapamycin, AMP-activated protein kinase, insulin/insulin-like growth factor 1 pathway and sirtuins. In this review we provide a summary of the main molecular mechanisms by which different nutritional conditions, i.e., specific nutrient abundance or restriction, may affect health span and life span.
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Affiliation(s)
- Carla Pignatti
- Department of Biomedical and Neuromotor Sciences, Alma Mater Studiorum, University of Bologna, 40126 Bologna, Italy; (C.P.); (F.F.)
| | - Stefania D’Adamo
- Department of Medical and Surgical Sciences, Alma Mater Studiorum, University of Bologna, 40136 Bologna, Italy;
- Laboratory of Immunorheumatology and Tissue Regeneration, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
| | - Claudio Stefanelli
- Department for Life Quality Studies, Alma Mater Studiorum, University of Bologna, 47921 Rimini, Italy;
| | - Flavio Flamigni
- Department of Biomedical and Neuromotor Sciences, Alma Mater Studiorum, University of Bologna, 40126 Bologna, Italy; (C.P.); (F.F.)
| | - Silvia Cetrullo
- Department of Biomedical and Neuromotor Sciences, Alma Mater Studiorum, University of Bologna, 40126 Bologna, Italy; (C.P.); (F.F.)
- Correspondence: ; Tel.: +39-051-209-1241
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15
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Zemel MB. Modulation of Energy Sensing by Leucine Synergy with Natural Sirtuin Activators: Effects on Health Span. J Med Food 2020; 23:1129-1135. [PMID: 32758058 DOI: 10.1089/jmf.2020.0105] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Sirt1 and 5' adenosine monophosphate-activated protein kinase (AMPK) are energy-sensing systems that work cooperatively and regulate mitochondrial biogenesis and fuel metabolism, and mediate, in part, the salutary effects of caloric restriction on lifespan and healthspan. We have shown that leucine activates Sirt1 and enables synergy with sirtuin co-activators. Resveratrol is a widely recognized activator of Sirt1; however, poor bioavailability and rapid metabolism limit effective clinical translation of promising animal data. However, we found that combining low resveratrol doses with leucine increased skeletal muscle and adipocyte Sirt1 activity, mitochondrial biogenesis and fatty acid oxidation; these effects result in increased lifespan and marked reductions in insulin resistance, inflammatory markers, body weight, and visceral adiposity in preclinical models. To translate these data to humans, we assessed the effects of resveratrol (50 mg)/leucine (1.11 g) on glucose dynamics in a 4-week placebo-controlled trial of 36 prediabetic subjects. Leucine-resveratrol reduced insulin resistance (homeostatic model assessment for insulin resistance) 33% with corresponding reductions in glucose and insulin area under the curve in oral glucose tolerance tests. We extended these concepts in preclinical studies using both direct Sirt1 activators and Sirt1 pathway activators. Low-dose (10 nM) NAD+ precursors (nicotinic acid, nicotinamide mononucleotide, and nicotinamide riboside) synergized with leucine to increase Sirt1 activity in adipocytes, hepatocytes, and muscle cells (30-100%, P < .01) and lifespan in Caenorhabditis elegans (25%, P = .025) and to significantly regress atherosclerotic lesion size and macrophage infiltration in a mouse model of atherosclerosis. Thus, synergistic activation of Sirt1 using leucine and a co-activator exerts pleiotropic effects impacting cardiometabolic endpoints.
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Affiliation(s)
- Michael B Zemel
- NuSirt Biopharma, Research and Development, Knoxville, Tennessee, USA
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16
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Abstract
An experiment of divergent selection for intramuscular fat was carried out at Universitat Politècnica de València. The high response of selection in intramuscular fat content, after nine generations of selection, and a multidimensional scaling analysis showed a high degree of genomic differentiation between the two divergent populations. Therefore, local genomic differences could link genomic regions, encompassing selective sweeps, to the trait used as selection criterion. In this sense, the aim of this study was to identify genomic regions related to intramuscular fat through three methods for detection of selection signatures and to generate a list of candidate genes. The methods implemented in this study were Wright's fixation index, cross population composite likelihood ratio and cross population - extended haplotype homozygosity. Genomic data came from the 9th generation of the two populations divergently selected, 237 from Low line and 240 from High line. A high single nucleotide polymorphism (SNP) density array, Affymetrix Axiom OrcunSNP Array (around 200k SNPs), was used for genotyping samples. Several genomic regions distributed along rabbit chromosomes (OCU) were identified as signatures of selection (SNPs having a value above cut-off of 1%) within each method. In contrast, 8 genomic regions, harbouring 80 SNPs (OCU1, OCU3, OCU6, OCU7, OCU16 and OCU17), were identified by at least 2 methods and none by the 3 methods. In general, our results suggest that intramuscular fat selection influenced multiple genomic regions which can be a consequence of either only selection effect or the combined effect of selection and genetic drift. In addition, 73 genes were retrieved from the 8 selection signatures. After functional and enrichment analyses, the main genes into the selection signatures linked to energy, fatty acids, carbohydrates and lipid metabolic processes were ACER2, PLIN2, DENND4C, RPS6, RRAGA (OCU1), ST8SIA6, VIM (OCU16), RORA, GANC and PLA2G4B (OCU17). This genomic scan is the first study using rabbits from a divergent selection experiment. Our results pointed out a large polygenic component of the intramuscular fat content. Besides, promising positional candidate genes would be analysed in further studies in order to bear out their contributions to this trait and their feasible implications for rabbit breeding programmes.
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Han X, Guo J, You Y, Zhan J, Huang W. p-Coumaric acid prevents obesity via activating thermogenesis in brown adipose tissue mediated by mTORC1-RPS6. FASEB J 2020; 34:7810-7824. [PMID: 32350925 DOI: 10.1096/fj.202000333r] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 03/25/2020] [Accepted: 03/26/2020] [Indexed: 12/24/2022]
Abstract
Brown adipose tissue (BAT) has long been recognized as an energy-consuming organ and a possible target for combating metabolism disorder. Although numerous studies have demonstrated the ability of phytochemical phenolic acids to improve obesity by activating BAT, the underlying mechanism or mechanism therein remain obscure. In this study, diet-induced obese mice, genetically obese mice, and C3H10T1/2 cells were used to examine the effects of p-Coumaric acid (CA) on metabolism profiles. The results showed that CA prevented metabolic syndromes in the two mice models through the activation of BAT. This phenomenon was closely linked to the upregulation of uncoupling protein 1 (UCP1) and the accelerated burning of fatty acids and glucose, which consequently enhanced the energy expenditure and thermogenesis. Similar results were also obtained in vitro. Importantly, these effects were mediated by the mammalian target of rapamycin complex 1 (mTORC1)-RPS6 pathway. These findings reveal, to the best of our knowledge for the first time, the close correlation between mTORC1-RPS6 and BAT-mediated thermogenesis, and, in addition, the key role played by mTORC1-RPS6 in mediating phenolic acids-induced activation of BAT, thus preventing obesity.
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Affiliation(s)
- Xue Han
- Beijing Key Laboratory of Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Jielong Guo
- Beijing Key Laboratory of Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Yilin You
- Beijing Key Laboratory of Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Jicheng Zhan
- Beijing Key Laboratory of Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Weidong Huang
- Beijing Key Laboratory of Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
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Trubitsyn AG. The Mechanism of Programmed Aging: The Way to Create a Real Remedy for Senescence. Curr Aging Sci 2020; 13:31-41. [PMID: 31660847 PMCID: PMC7403645 DOI: 10.2174/1874609812666191014111422] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 09/17/2019] [Accepted: 09/18/2019] [Indexed: 12/30/2022]
Abstract
BACKGROUND Accumulation of various damages is considered the primary cause of aging throughout the history of gerontology. No progress has been made in extending animal lifespan under the guidance of this concept. This concept denies the existence of longevity genes, but it has been experimentally shown that manipulating genes that affect cell division rates can increase the maximum lifespan of animals. These methods of prolonging life are unsuitable for humans because of dangerous side effects, but they undoubtedly indicate the programmed nature of aging. OBJECTIVE The objective was to understand the mechanism of programmed aging to determine how to solve the problem of longevity. METHODS Fundamental research has already explored key details relating to the mechanism of programmed aging, but they are scattered across different fields of knowledge. The way was to recognize and combine them into a uniform mechanism. RESULTS Only a decrease in bioenergetics is under direct genetic control. This causes many different harmful processes that serve as the execution mechanism of the aging program. The aging rate and, therefore, lifespan are determined by the rate of cell proliferation and the magnitude of the decrease in bioenergetics per cell division in critical tissues. CONCLUSION The mechanism of programmed aging points the way to achieving an unlimited healthy life; it is necessary to develop a means for managing bioenergetics. It has already been substantially studied by molecular biologists and is now waiting for researchers from gerontology.
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Affiliation(s)
- Alexander G. Trubitsyn
- Institute of Biology of Far Eastern Branch of Russian Academy of Sciences, pr. 100-letiya Vladivostoka 159, Vladivostok, 690022, Russia
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Prioretti L, Carriere F, Field B, Avilan L, Montané MH, Menand B, Gontero B. Targeting TOR signaling for enhanced lipid productivity in algae. Biochimie 2019; 169:12-17. [PMID: 31265860 DOI: 10.1016/j.biochi.2019.06.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 06/26/2019] [Indexed: 01/21/2023]
Abstract
Microalgae can produce large quantities of triacylglycerols (TAGs) and other neutral lipids that are suitable for making biofuels and as feedstocks for green chemistry. However, TAGs accumulate under stress conditions that also stop growth, leading to a trade-off between biomass production and TAG yield. Recently, in the model marine diatom Phaeodactylum tricornutum it was shown that inhibition of the target of rapamycin (TOR) kinase boosts lipid productivity by promoting TAG production without stopping growth. We believe that basic knowledge in this emerging field is required to develop innovative strategies to improve neutral lipid accumulation in oleaginous microalgae. In this minireview, we discuss current research on the TOR signaling pathway with a focus on its control on lipid homeostasis. We first provide an overview of the well characterized roles of TOR in mammalian lipogenesis, adipogenesis and lipolysis. We then present evidence of a role for TOR in controlling TAG accumulation in microalgae, and draw parallels between the situation in animals, plants and microalgae to propose a model of TOR signaling for TAG accumulation in microalgae.
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Affiliation(s)
- Laura Prioretti
- Aix Marseille Univ, CNRS, BIP UMR 7281, 31 Chemin Joseph Aiguier, 13402, Marseille, Cedex 09, France
| | - Frédéric Carriere
- Aix Marseille Univ, CNRS, BIP UMR 7281, 31 Chemin Joseph Aiguier, 13402, Marseille, Cedex 09, France
| | - Ben Field
- Aix Marseille Univ, CEA, CNRS, UMR 7265 BIAM, 163 Avenue de Luminy, 13288, Marseille, France
| | - Luisana Avilan
- Aix Marseille Univ, CNRS, BIP UMR 7281, 31 Chemin Joseph Aiguier, 13402, Marseille, Cedex 09, France
| | - Marie-Hélène Montané
- Aix Marseille Univ, CEA, CNRS, UMR 7265 BIAM, 163 Avenue de Luminy, 13288, Marseille, France
| | - Benoît Menand
- Aix Marseille Univ, CEA, CNRS, UMR 7265 BIAM, 163 Avenue de Luminy, 13288, Marseille, France.
| | - Brigitte Gontero
- Aix Marseille Univ, CNRS, BIP UMR 7281, 31 Chemin Joseph Aiguier, 13402, Marseille, Cedex 09, France.
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