1351
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Abstract
The incidence and prevalence of cardiac diseases, which are the main cause of death worldwide, are likely to increase because of population ageing. Prevailing theories about the mechanisms of ageing feature the gradual derailment of cellular protein homeostasis (proteostasis) and loss of protein quality control as central factors. In the heart, loss of protein patency, owing to flaws in genetically-determined design or because of environmentally-induced 'wear and tear', can overwhelm protein quality control, thereby triggering derailment of proteostasis and contributing to cardiac ageing. Failure of protein quality control involves impairment of chaperones, ubiquitin-proteosomal systems, autophagy, and loss of sarcomeric and cytoskeletal proteins, all of which relate to induction of cardiomyocyte senescence. Targeting protein quality control to maintain cardiac proteostasis offers a novel therapeutic strategy to promote cardiac health and combat cardiac disease. Currently marketed drugs are available to explore this concept in the clinical setting.
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Affiliation(s)
- Robert H Henning
- Department of Clinical Pharmacy and Pharmacology, University Medical Centre Groningen, University of Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
| | - Bianca J J M Brundel
- Department of Physiology, Amsterdam Cardiovascular Sciences, VU University Medical Center, De Boelelaan 1117, 1081 HZ Amsterdam, The Netherlands
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1352
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Heiss C, Spyridopoulos I, Haendeler J. Interventions to slow cardiovascular aging: Dietary restriction, drugs and novel molecules. Exp Gerontol 2017; 109:108-118. [PMID: 28658611 DOI: 10.1016/j.exger.2017.06.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2017] [Revised: 06/16/2017] [Accepted: 06/21/2017] [Indexed: 02/05/2023]
Abstract
Cardiovascular aging is a highly dynamic process. Despite the fact that cardiovascular function and structure change with age, they can still be modulated even in aged humans. The most prominent approaches to improve age-dependent vascular changes include dietary restriction and pharmacologic agents interacting with signaling pathways implicated in this context. These include inhibition of TOR, glycolysis, and GH/IGF-1, activation of sirtuins, and AMPK, as well as modulators of inflammation, epigenetic pathways, and telomeres. Promising nutritional approaches include Mediterranean diet and novel dietary bioactives including flavanols, anthocyanins, and lignins. Many plant bioactives improve cardiovascular parameters implied in vascular healthy aging including endothelial function, arterial stiffness, blood pressure, cholesterol, and glycemic control. However, the mechanism of action of most bioactives is not established and it remains to be elucidated whether they act as dietary restriction mimetics or via other modes of action. Even more importantly, whether these interventions can slow or even reverses components of cardiovascular aging itself and can increase healthspan or longevity in humans needs to be determined.
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Affiliation(s)
- Christian Heiss
- Division of Cardiology, Pulmonology and Vascular Medicine, Medical Faculty, University Duesseldorf, Moorenstr. 5, 40225 Duesseldorf, Germany.
| | - Ioakim Spyridopoulos
- Institute of Genetic Medicine, Medical Faculty, Newcastle University, Central Parkway, Newcastle upon Tyne NE1 3BZ, UK.
| | - Judith Haendeler
- Central Institute of Clinical Chemistry and Laboratory Medicine, Medical Faculty, University of Duesseldorf, Moorenstr. 5, 40225 Duesseldorf, Germany; IUF-Leibniz Research Institute for Environmental Medicine, Auf'm Hennekamp 50, 40225 Duesseldorf, Germany.
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1353
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Lozano-Torres B, Galiana I, Rovira M, Garrido E, Chaib S, Bernardos A, Muñoz-Espín D, Serrano M, Martínez-Máñez R, Sancenón F. An OFF–ON Two-Photon Fluorescent Probe for Tracking Cell Senescence in Vivo. J Am Chem Soc 2017. [DOI: 10.1021/jacs.7b04985] [Citation(s) in RCA: 102] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Beatriz Lozano-Torres
- Instituto
Interuniversitario de Investigación de Reconocimiento Molecular
y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat de València, Valencia, Spain
- Unidad
Mixta UPV-CIPF de Investigación en Mecanismos de Enfermedades
y Nanomedicina, Universitat Politècnica de València, Centro de Investigación Príncipe Felipe, Valencia, Spain
- CIBER de Bioingeniería,
Biomateriales y Nanomedicina (CIBER-BBN)
- Unidad
Mixta de Investigación en Nanomedicina y Sensores. Universitat Politècnica de València, IIS La Fe, Valencia, Spain
| | - Irene Galiana
- Instituto
Interuniversitario de Investigación de Reconocimiento Molecular
y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat de València, Valencia, Spain
- Unidad
Mixta UPV-CIPF de Investigación en Mecanismos de Enfermedades
y Nanomedicina, Universitat Politècnica de València, Centro de Investigación Príncipe Felipe, Valencia, Spain
- CIBER de Bioingeniería,
Biomateriales y Nanomedicina (CIBER-BBN)
- Unidad
Mixta de Investigación en Nanomedicina y Sensores. Universitat Politècnica de València, IIS La Fe, Valencia, Spain
| | - Miguel Rovira
- Tumor
Suppression Group, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Eva Garrido
- Instituto
Interuniversitario de Investigación de Reconocimiento Molecular
y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat de València, Valencia, Spain
- Unidad
Mixta UPV-CIPF de Investigación en Mecanismos de Enfermedades
y Nanomedicina, Universitat Politècnica de València, Centro de Investigación Príncipe Felipe, Valencia, Spain
- CIBER de Bioingeniería,
Biomateriales y Nanomedicina (CIBER-BBN)
- Unidad
Mixta de Investigación en Nanomedicina y Sensores. Universitat Politècnica de València, IIS La Fe, Valencia, Spain
| | - Selim Chaib
- Tumor
Suppression Group, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Andrea Bernardos
- Instituto
Interuniversitario de Investigación de Reconocimiento Molecular
y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat de València, Valencia, Spain
- Unidad
Mixta UPV-CIPF de Investigación en Mecanismos de Enfermedades
y Nanomedicina, Universitat Politècnica de València, Centro de Investigación Príncipe Felipe, Valencia, Spain
- CIBER de Bioingeniería,
Biomateriales y Nanomedicina (CIBER-BBN)
- Unidad
Mixta de Investigación en Nanomedicina y Sensores. Universitat Politècnica de València, IIS La Fe, Valencia, Spain
| | - Daniel Muñoz-Espín
- Tumor
Suppression Group, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
- CRUK
Cancer Centre Early Detection Programme, Department of Oncology, University of Cambridge, Hutchison/MRC Research Centre, Cambridge, U.K
| | - Manuel Serrano
- Tumor
Suppression Group, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Ramón Martínez-Máñez
- Instituto
Interuniversitario de Investigación de Reconocimiento Molecular
y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat de València, Valencia, Spain
- Unidad
Mixta UPV-CIPF de Investigación en Mecanismos de Enfermedades
y Nanomedicina, Universitat Politècnica de València, Centro de Investigación Príncipe Felipe, Valencia, Spain
- CIBER de Bioingeniería,
Biomateriales y Nanomedicina (CIBER-BBN)
- Unidad
Mixta de Investigación en Nanomedicina y Sensores. Universitat Politècnica de València, IIS La Fe, Valencia, Spain
| | - Félix Sancenón
- Instituto
Interuniversitario de Investigación de Reconocimiento Molecular
y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat de València, Valencia, Spain
- Unidad
Mixta UPV-CIPF de Investigación en Mecanismos de Enfermedades
y Nanomedicina, Universitat Politècnica de València, Centro de Investigación Príncipe Felipe, Valencia, Spain
- CIBER de Bioingeniería,
Biomateriales y Nanomedicina (CIBER-BBN)
- Unidad
Mixta de Investigación en Nanomedicina y Sensores. Universitat Politècnica de València, IIS La Fe, Valencia, Spain
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1354
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Baar MP, Brandt RMC, Putavet DA, Klein JDD, Derks KWJ, Bourgeois BRM, Stryeck S, Rijksen Y, van Willigenburg H, Feijtel DA, van der Pluijm I, Essers J, van Cappellen WA, van IJcken WF, Houtsmuller AB, Pothof J, de Bruin RWF, Madl T, Hoeijmakers JHJ, Campisi J, de Keizer PLJ. Targeted Apoptosis of Senescent Cells Restores Tissue Homeostasis in Response to Chemotoxicity and Aging. Cell 2017; 169:132-147.e16. [PMID: 28340339 DOI: 10.1016/j.cell.2017.02.031] [Citation(s) in RCA: 862] [Impact Index Per Article: 123.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 12/29/2016] [Accepted: 02/22/2017] [Indexed: 02/06/2023]
Abstract
The accumulation of irreparable cellular damage restricts healthspan after acute stress or natural aging. Senescent cells are thought to impair tissue function, and their genetic clearance can delay features of aging. Identifying how senescent cells avoid apoptosis allows for the prospective design of anti-senescence compounds to address whether homeostasis can also be restored. Here, we identify FOXO4 as a pivot in senescent cell viability. We designed a FOXO4 peptide that perturbs the FOXO4 interaction with p53. In senescent cells, this selectively causes p53 nuclear exclusion and cell-intrinsic apoptosis. Under conditions where it was well tolerated in vivo, this FOXO4 peptide neutralized doxorubicin-induced chemotoxicity. Moreover, it restored fitness, fur density, and renal function in both fast aging XpdTTD/TTD and naturally aged mice. Thus, therapeutic targeting of senescent cells is feasible under conditions where loss of health has already occurred, and in doing so tissue homeostasis can effectively be restored.
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Affiliation(s)
- Marjolein P Baar
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Renata M C Brandt
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Diana A Putavet
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Julian D D Klein
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Kasper W J Derks
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Benjamin R M Bourgeois
- Institute of Molecular Biology & Biochemistry, Center of Molecular Medicine, Medical University of Graz, 8010 Graz, Austria
| | - Sarah Stryeck
- Institute of Molecular Biology & Biochemistry, Center of Molecular Medicine, Medical University of Graz, 8010 Graz, Austria
| | - Yvonne Rijksen
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Hester van Willigenburg
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Danny A Feijtel
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Ingrid van der Pluijm
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands; Department of Vascular Surgery, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Jeroen Essers
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands; Department of Vascular Surgery, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands; Department of Radiation Oncology, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Wiggert A van Cappellen
- Erasmus Optical Imaging Center and Department of Pathology, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Wilfred F van IJcken
- Department of Cell Biology, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Adriaan B Houtsmuller
- Erasmus Optical Imaging Center and Department of Pathology, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Joris Pothof
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Ron W F de Bruin
- Department of Surgery, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Tobias Madl
- Institute of Molecular Biology & Biochemistry, Center of Molecular Medicine, Medical University of Graz, 8010 Graz, Austria
| | - Jan H J Hoeijmakers
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Judith Campisi
- The Buck Institute for Research on Aging, 8001 Redwood Blvd., Novato, CA 94945, USA; Lawrence Berkeley National Laboratories, Berkeley, CA 94720, USA
| | - Peter L J de Keizer
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands; The Buck Institute for Research on Aging, 8001 Redwood Blvd., Novato, CA 94945, USA.
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1355
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Ogrodnik M, Miwa S, Tchkonia T, Tiniakos D, Wilson CL, Lahat A, Day CP, Burt A, Palmer A, Anstee QM, Grellscheid SN, Hoeijmakers JHJ, Barnhoorn S, Mann DA, Bird TG, Vermeij WP, Kirkland JL, Passos JF, von Zglinicki T, Jurk D. Cellular senescence drives age-dependent hepatic steatosis. Nat Commun 2017; 8:15691. [PMID: 28608850 PMCID: PMC5474745 DOI: 10.1038/ncomms15691] [Citation(s) in RCA: 612] [Impact Index Per Article: 87.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Accepted: 04/20/2017] [Indexed: 02/06/2023] Open
Abstract
The incidence of non-alcoholic fatty liver disease (NAFLD) increases with age. Cellular senescence refers to a state of irreversible cell-cycle arrest combined with the secretion of proinflammatory cytokines and mitochondrial dysfunction. Senescent cells contribute to age-related tissue degeneration. Here we show that the accumulation of senescent cells promotes hepatic fat accumulation and steatosis. We report a close correlation between hepatic fat accumulation and markers of hepatocyte senescence. The elimination of senescent cells by suicide gene-meditated ablation of p16Ink4a-expressing senescent cells in INK-ATTAC mice or by treatment with a combination of the senolytic drugs dasatinib and quercetin (D+Q) reduces overall hepatic steatosis. Conversely, inducing hepatocyte senescence promotes fat accumulation in vitro and in vivo. Mechanistically, we show that mitochondria in senescent cells lose the ability to metabolize fatty acids efficiently. Our study demonstrates that cellular senescence drives hepatic steatosis and elimination of senescent cells may be a novel therapeutic strategy to reduce steatosis.
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Affiliation(s)
- Mikolaj Ogrodnik
- Newcastle University Institute for Ageing, Institute for Cell and Molecular Biosciences, Campus for Ageing and Vitality, Newcastle University, Newcastle upon Tyne NE4 5PL, UK
| | - Satomi Miwa
- Newcastle University Institute for Ageing, Institute for Cell and Molecular Biosciences, Campus for Ageing and Vitality, Newcastle University, Newcastle upon Tyne NE4 5PL, UK
| | - Tamar Tchkonia
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, 200 First Street SW, Rochester, Minnesota 55905, USA
| | - Dina Tiniakos
- Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
- Department of Pathology, Aretaieio Hospital, Medical School, National & Kapodistrian University of Athens, Athens 11528, Greece
| | - Caroline L. Wilson
- Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
| | - Albert Lahat
- Department of Biosciences, Durham University, Durham DH1 3LE, UK
| | - Christoper P. Day
- Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
- Liver Unit, Newcastle upon Tyne Hospitals NHS Trust, Freeman Hospital, Newcastle upon Tyne NE7 7DN, UK
| | - Alastair Burt
- Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
- The University of Adelaide, Faculty of Health Science, North Terrace, Adelaide, South Australia 5005, Australia
| | - Allyson Palmer
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, 200 First Street SW, Rochester, Minnesota 55905, USA
| | - Quentin M. Anstee
- Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
| | | | - Jan H J. Hoeijmakers
- Department of Molecular Genetics, Erasmus University Medical Center, PO Box 2040, Rotterdam 3000 CA, The Netherlands
- CECAD Forschungszentrum, Universität zu Köln, Joseph-Stelzmann-Straße 26, Köln 50931, Germany
| | - Sander Barnhoorn
- Department of Molecular Genetics, Erasmus University Medical Center, PO Box 2040, Rotterdam 3000 CA, The Netherlands
| | - Derek A. Mann
- Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
| | - Thomas G. Bird
- MRC Centre for Inflammation Research, The Queen’s Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, UK
- Cancer Research UK Beatson Institute, Glasgow G61 1BD, UK
| | - Wilbert P. Vermeij
- Department of Molecular Genetics, Erasmus University Medical Center, PO Box 2040, Rotterdam 3000 CA, The Netherlands
| | - James L. Kirkland
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, 200 First Street SW, Rochester, Minnesota 55905, USA
| | - João F. Passos
- Newcastle University Institute for Ageing, Institute for Cell and Molecular Biosciences, Campus for Ageing and Vitality, Newcastle University, Newcastle upon Tyne NE4 5PL, UK
| | - Thomas von Zglinicki
- Newcastle University Institute for Ageing, Institute for Cell and Molecular Biosciences, Campus for Ageing and Vitality, Newcastle University, Newcastle upon Tyne NE4 5PL, UK
| | - Diana Jurk
- Newcastle University Institute for Ageing, Institute for Cell and Molecular Biosciences, Campus for Ageing and Vitality, Newcastle University, Newcastle upon Tyne NE4 5PL, UK
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1356
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Salmonowicz H, Passos JF. Detecting senescence: a new method for an old pigment. Aging Cell 2017; 16:432-434. [PMID: 28185406 PMCID: PMC5418201 DOI: 10.1111/acel.12580] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/17/2017] [Indexed: 01/23/2023] Open
Abstract
Cellular senescence is a state of irreversible cell cycle arrest induced by different types of cellular stresses. The field of senescence has made significant advances in the understanding of many of the mechanisms governing this phenomenon; however, a universal biomarker that unambiguously distinguishes senescent from proliferating cells has not been found. In this issue of Aging Cell, Evangelou and colleagues developed a sensitive method for identification of senescent cells in different types of biological material based on the detection of lipofuscin using an analogue of Sudan Black B (SBB) histochemical dye coupled with biotin, which they named GL13. The authors propose that this method is more sensitive and versatile than using SBB alone. Lipofuscin, a nondegradable oxidation product of lipids, proteins and metals, is found in senescent cells. Detection of lipofuscin using GL13 staining may be a more feasible method than others currently used for identification of senescent cells both in cell culture and tissues.
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Affiliation(s)
- Hanna Salmonowicz
- Institute for Cell and Molecular Biosciences & Newcastle University Institute for Ageing; Newcastle upon Tyne NE4 5PL UK
| | - João F. Passos
- Institute for Cell and Molecular Biosciences & Newcastle University Institute for Ageing; Newcastle upon Tyne NE4 5PL UK
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1357
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Cortese FAB, Aguiar S, Santostasi G. Induced Cell Turnover: A Novel Therapeutic Modality for In Situ Tissue Regeneration. Hum Gene Ther 2017; 28:703-716. [PMID: 28557533 DOI: 10.1089/hum.2016.167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Induced cell turnover (ICT) is a theoretical intervention in which the targeted ablation of damaged, diseased, and/or nonfunctional cells is coupled with replacement by partially differentiated induced pluripotent stem cells in a gradual and multiphasic manner. Tissue-specific ablation can be achieved using pro-apoptotic small molecule cocktails, peptide mimetics, and/or tissue-tropic adeno-associated virus-delivered suicide genes driven by cell type-specific promoters. Replenishment with new cells can be mediated by systemic administration of cells engineered for homing, robustness, and even enhanced function and disease resistance. Otherwise, the controlled release of cells can be achieved using implanted biodegradable scaffolds, hydrogels, and polymer matrixes. In theory, ICT would enable in situ tissue regeneration without the need for surgical transplantation of organs produced ex vivo, and addresses non-transplantable tissues (such as the vasculature, lymph nodes, and the nervous system). This article outlines several complimentary strategies for overcoming barriers to ICT in an effort to stimulate further research at this promising interface of cell therapy, tissue engineering, and regenerative medicine.
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Affiliation(s)
- Francesco Albert Bosco Cortese
- 1 Biogerontology Research Foundation, Oxford, United Kingdom .,2 Department of Biomedical and Molecular Sciences, Queen's University School of Medicine, Queen's University, Kingston, Canada
| | - Sebastian Aguiar
- 3 Neurobiology Department, Swammerdam Institute of Life Sciences, University of Amsterdam, Amsterdam, The Netherlands
| | - Giovanni Santostasi
- 4 Department of Neurology, Feinberg School of Medicine, Northwestern University , Chicago, Illinois
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1358
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Samaraweera L, Adomako A, Rodriguez-Gabin A, McDaid HM. A Novel Indication for Panobinostat as a Senolytic Drug in NSCLC and HNSCC. Sci Rep 2017; 7:1900. [PMID: 28507307 PMCID: PMC5432488 DOI: 10.1038/s41598-017-01964-1] [Citation(s) in RCA: 95] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Accepted: 04/07/2017] [Indexed: 01/07/2023] Open
Abstract
Panobinostat (pano) is an FDA-approved histone deacetylase inhibitor. There is interest in evaluating alternate dosing schedules and novel combinations of pano for the treatment of upper aerodigestive and lung malignancies; thus we evaluated it in combination with Taxol, a chemotherapeutic with activity in both diseases. Dose-dependent synergy was observed in Non-Small Cell Lung Cancer (NSCLC) and Head and Neck Squamous Cell Carcinoma (HNSCC) cell lines and was due to senescence rather than potentiation of cell death. Senescence occurred following cisplatin- or Taxol-treatment in cell lines from both cancer types and was associated with decreased histone 3 (H3) acetylation and increased Bcl-xL expression: the latter a biomarker of senescence and target of anti-senescence therapeutics, or senolytics. Since H3 acetylation and Bcl-xL expression were altered in senescence, we subsequently evaluated pano as a senolytic in chemotherapy-treated cancer cells enriched for senescent cells. Pano caused cell death at significantly higher rates compared to repeat dosing with chemotherapy. This was associated with decreased expression of Bcl-xL and increased acetylated H3, reversing the expression patterns observed in senescence. These data support evaluating pano as a post-chemotherapy senolytic with the potential to kill persistent senescent cells that accumulate during standard chemotherapy in NSCLC and HNSCC.
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Affiliation(s)
- Leleesha Samaraweera
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, 10461, USA
| | - Alfred Adomako
- Department of Pathology, Albert Einstein College of Medicine, Bronx, NY, 10461, USA
| | - Alicia Rodriguez-Gabin
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, 10461, USA
| | - Hayley M McDaid
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, 10461, USA.
- Medicine (Oncology), Albert Einstein College of Medicine, Bronx, NY, 10461, USA.
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1359
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1360
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Menendez JA, Alarcón T. Senescence-Inflammatory Regulation of Reparative Cellular Reprogramming in Aging and Cancer. Front Cell Dev Biol 2017; 5:49. [PMID: 28529938 PMCID: PMC5418360 DOI: 10.3389/fcell.2017.00049] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Accepted: 04/18/2017] [Indexed: 12/16/2022] Open
Abstract
The inability of adult tissues to transitorily generate cells with functional stem cell-like properties is a major obstacle to tissue self-repair. Nuclear reprogramming-like phenomena that induce a transient acquisition of epigenetic plasticity and phenotype malleability may constitute a reparative route through which human tissues respond to injury, stress, and disease. However, tissue rejuvenation should involve not only the transient epigenetic reprogramming of differentiated cells, but also the committed re-acquisition of the original or alternative committed cell fate. Chronic or unrestrained epigenetic plasticity would drive aging phenotypes by impairing the repair or the replacement of damaged cells; such uncontrolled phenomena of in vivo reprogramming might also generate cancer-like cellular states. We herein propose that the ability of senescence-associated inflammatory signaling to regulate in vivo reprogramming cycles of tissue repair outlines a threshold model of aging and cancer. The degree of senescence/inflammation-associated deviation from the homeostatic state may delineate a type of thresholding algorithm distinguishing beneficial from deleterious effects of in vivo reprogramming. First, transient activation of NF-κB-related innate immunity and senescence-associated inflammatory components (e.g., IL-6) might facilitate reparative cellular reprogramming in response to acute inflammatory events. Second, para-inflammation switches might promote long-lasting but reversible refractoriness to reparative cellular reprogramming. Third, chronic senescence-associated inflammatory signaling might lock cells in highly plastic epigenetic states disabled for reparative differentiation. The consideration of a cellular reprogramming-centered view of epigenetic plasticity as a fundamental element of a tissue's capacity to undergo successful repair, aging degeneration or malignant transformation should provide challenging stochastic insights into the current deterministic genetic paradigm for most chronic diseases, thereby increasing the spectrum of therapeutic approaches for physiological aging and cancer.
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Affiliation(s)
- Javier A Menendez
- Metabolism and Cancer Group, Program Against Cancer Therapeutic Resistance, Catalan Institute of OncologyGirona, Spain.,Molecular Oncology Group, Girona Biomedical Research Institute (IDIBGI)Girona, Spain.,METABOSTEMBarcelona, Spain
| | - Tomás Alarcón
- Institució Catalana de Recerca i Estudis Avançats (ICREA)Barcelona, Spain.,Computational and Mathematical Biology Research Group, Centre de Recerca MatemàticaBarcelona, Spain.,Departament de Matemàtiques, Universitat Autònoma de BarcelonaBarcelona, Spain.,Barcelona Graduate School of MathematicsBarcelona, Spain
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1361
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Bettio LEB, Rajendran L, Gil-Mohapel J. The effects of aging in the hippocampus and cognitive decline. Neurosci Biobehav Rev 2017; 79:66-86. [PMID: 28476525 DOI: 10.1016/j.neubiorev.2017.04.030] [Citation(s) in RCA: 337] [Impact Index Per Article: 48.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 03/15/2017] [Accepted: 04/10/2017] [Indexed: 02/06/2023]
Abstract
Aging is a natural process that is associated with cognitive decline as well as functional and social impairments. One structure of particular interest when considering aging and cognitive decline is the hippocampus, a brain region known to play an important role in learning and memory consolidation as well as in affective behaviours and mood regulation, and where both functional and structural plasticity (e.g., neurogenesis) occur well into adulthood. Neurobiological alterations seen in the aging hippocampus including increased oxidative stress and neuroinflammation, altered intracellular signalling and gene expression, as well as reduced neurogenesis and synaptic plasticity, are thought to be associated with age-related cognitive decline. Non-invasive strategies such as caloric restriction, physical exercise, and environmental enrichment have been shown to counteract many of the age-induced alterations in hippocampal signalling, structure, and function. Thus, such approaches may have therapeutic value in counteracting the deleterious effects of aging and protecting the brain against age-associated neurodegenerative processes.
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Affiliation(s)
- Luis E B Bettio
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
| | - Luckshi Rajendran
- Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Joana Gil-Mohapel
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada; UBC Island Medical program, University of Victoria, Victoria, BC, Canada.
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1362
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Sarcopenic obesity or obese sarcopenia: A cross talk between age-associated adipose tissue and skeletal muscle inflammation as a main mechanism of the pathogenesis. Ageing Res Rev 2017; 35:200-221. [PMID: 27702700 DOI: 10.1016/j.arr.2016.09.008] [Citation(s) in RCA: 434] [Impact Index Per Article: 62.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 08/23/2016] [Accepted: 09/26/2016] [Indexed: 02/08/2023]
Abstract
Sarcopenia, an age-associated decline in skeletal muscle mass coupled with functional deterioration, may be exacerbated by obesity leading to higher disability, frailty, morbidity and mortality rates. In the combination of sarcopenia and obesity, the state called sarcopenic obesity (SOB), some key age- and obesity-mediated factors and pathways may aggravate sarcopenia. This review will analyze the mechanisms underlying the pathogenesis of SOB. In obese adipose tissue (AT), adipocytes undergo hypertrophy, hyperplasia and activation resulted in accumulation of pro-inflammatory macrophages and other immune cells as well as dysregulated production of various adipokines that together with senescent cells and the immune cell-released cytokines and chemokines create a local pro-inflammatory status. In addition, obese AT is characterized by excessive production and disturbed capacity to store lipids, which accumulate ectopically in skeletal muscle. These intramuscular lipids and their derivatives induce mitochondrial dysfunction characterized by impaired β-oxidation capacity and increased reactive oxygen species formation providing lipotoxic environment and insulin resistance as well as enhanced secretion of some pro-inflammatory myokines capable of inducing muscle dysfunction by auto/paracrine manner. In turn, by endocrine manner, these myokines may exacerbate AT inflammation and also support chronic low grade systemic inflammation (inflammaging), overall establishing a detrimental vicious circle maintaining AT and skeletal muscle inflammation, thus triggering and supporting SOB development. Under these circumstances, we believe that AT inflammation dominates over skeletal muscle inflammation. Thus, in essence, it redirects the vector of processes from "sarcopenia→obesity" to "obesity→sarcopenia". We therefore propose that this condition be defined as "obese sarcopenia", to reflect the direction of the pathological pathway.
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1363
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Sritharen Y, Enriquez-Sarano M, Schaff HV, Casaclang-Verzosa G, Miller JD. Pathophysiology of Aortic Valve Stenosis: Is It Both Fibrocalcific and Sex Specific? Physiology (Bethesda) 2017; 32:182-196. [PMID: 28404735 PMCID: PMC6148342 DOI: 10.1152/physiol.00025.2016] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Revised: 02/10/2017] [Accepted: 02/10/2017] [Indexed: 12/24/2022] Open
Abstract
Our understanding of the fundamental biology and identification of efficacious therapeutic targets in aortic valve stenosis has lagged far behind the fields of atherosclerosis and heart failure. In this review, we highlight the most clinically relevant problems facing men and women with fibrocalcific aortic valve stenosis, discuss the fundamental biology underlying valve calcification and fibrosis, and identify key molecular points of intersection with sex hormone signaling.
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Affiliation(s)
- Yoginee Sritharen
- Department of Cardiovascular Surgery, Mayo Clinic, Rochester, Minnesota
| | | | - Hartzell V Schaff
- Department of Cardiovascular Surgery, Mayo Clinic, Rochester, Minnesota
| | - Grace Casaclang-Verzosa
- Department of Cardiovascular Surgery, Mayo Clinic, Rochester, Minnesota
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota
| | - Jordan D Miller
- Department of Cardiovascular Surgery, Mayo Clinic, Rochester, Minnesota;
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota
- Department of Surgery, Mayo Clinic, Rochester, Minnesota; and the
- Kogod Center on Aging, Mayo Clinic, Rochester, Minnesota
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1364
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Niedernhofer LJ, Kirkland JL, Ladiges W. Molecular pathology endpoints useful for aging studies. Ageing Res Rev 2017; 35:241-249. [PMID: 27721062 DOI: 10.1016/j.arr.2016.09.012] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 09/15/2016] [Accepted: 09/30/2016] [Indexed: 12/12/2022]
Abstract
The first clinical trial aimed at targeting fundamental processes of aging will soon be launched (TAME: Targeting Aging with Metformin). In its wake is a robust pipeline of therapeutic interventions that have been demonstrated to extend lifespan or healthspan of preclinical models, including rapalogs, antioxidants, anti-inflammatory agents, and senolytics. This ensures that if the TAME trial is successful, numerous additional clinical trials are apt to follow. But a significant impediment to these trials remains the question of what endpoints should be measured? The design of the TAME trial very cleverly skirts around this based on the fact that there are decades of data on metformin in humans, providing unequaled clarity of what endpoints are most likely to yield a positive outcome. But for a new chemical entity, knowing what endpoints to measure remains a formidable challenge. For economy's sake, and to achieve results in a reasonable time frame, surrogate markers of lifespan and healthy aging are desperately needed. This review provides a comprehensive analysis of molecular endpoints that are currently being used as indices of age-related phenomena (e.g., morbidity, frailty, mortality) and proposes an approach for validating and prioritizing these endpoints.
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Affiliation(s)
- L J Niedernhofer
- Department of Metabolism and Aging, The Scripps Research Institute, Jupiter, FL 33458, United States.
| | - J L Kirkland
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, MN 55905, United States
| | - W Ladiges
- Department of Comparative Medicine, School of Medicine, University of Washington, Seattle, WA 98195, United States
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1365
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Alfaras I, Di Germanio C, Bernier M, Csiszar A, Ungvari Z, Lakatta EG, de Cabo R. Pharmacological Strategies to Retard Cardiovascular Aging. Circ Res 2017; 118:1626-42. [PMID: 27174954 DOI: 10.1161/circresaha.116.307475] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Accepted: 04/08/2016] [Indexed: 01/10/2023]
Abstract
Aging is the major risk factor for cardiovascular diseases, which are the leading cause of death in the United States. Traditionally, the effort to prevent cardiovascular disease has been focused on addressing the conventional risk factors, including hypertension, hyperglycemia, hypercholesterolemia, and high circulating levels of triglycerides. However, recent preclinical studies have identified new approaches to combat cardiovascular disease. Calorie restriction has been reproducibly shown to prolong lifespan in various experimental model animals. This has led to the development of calorie restriction mimetics and other pharmacological interventions capable to delay age-related diseases. In this review, we will address the mechanistic effects of aging per se on the cardiovascular system and focus on the prolongevity benefits of various therapeutic strategies that support cardiovascular health.
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Affiliation(s)
- Irene Alfaras
- From the Experimental Gerontology Section, Translational Gerontology Branch (I.A., C.D.G., M.B., R.d.C.) and Laboratory of Cardiovascular Science (E.G.L.), National Institute on Aging, National Institutes of Health, Baltimore, MD; Faculty of Veterinary Medicine, University of Teramo, Teramo, Italy (C.D.G.); and Reynolds Oklahoma Center on Aging, Department of Geriatric Medicine, University of Oklahoma Health Science Center, Oklahoma City, OK (A.C., Z.U.)
| | - Clara Di Germanio
- From the Experimental Gerontology Section, Translational Gerontology Branch (I.A., C.D.G., M.B., R.d.C.) and Laboratory of Cardiovascular Science (E.G.L.), National Institute on Aging, National Institutes of Health, Baltimore, MD; Faculty of Veterinary Medicine, University of Teramo, Teramo, Italy (C.D.G.); and Reynolds Oklahoma Center on Aging, Department of Geriatric Medicine, University of Oklahoma Health Science Center, Oklahoma City, OK (A.C., Z.U.)
| | - Michel Bernier
- From the Experimental Gerontology Section, Translational Gerontology Branch (I.A., C.D.G., M.B., R.d.C.) and Laboratory of Cardiovascular Science (E.G.L.), National Institute on Aging, National Institutes of Health, Baltimore, MD; Faculty of Veterinary Medicine, University of Teramo, Teramo, Italy (C.D.G.); and Reynolds Oklahoma Center on Aging, Department of Geriatric Medicine, University of Oklahoma Health Science Center, Oklahoma City, OK (A.C., Z.U.)
| | - Anna Csiszar
- From the Experimental Gerontology Section, Translational Gerontology Branch (I.A., C.D.G., M.B., R.d.C.) and Laboratory of Cardiovascular Science (E.G.L.), National Institute on Aging, National Institutes of Health, Baltimore, MD; Faculty of Veterinary Medicine, University of Teramo, Teramo, Italy (C.D.G.); and Reynolds Oklahoma Center on Aging, Department of Geriatric Medicine, University of Oklahoma Health Science Center, Oklahoma City, OK (A.C., Z.U.)
| | - Zoltan Ungvari
- From the Experimental Gerontology Section, Translational Gerontology Branch (I.A., C.D.G., M.B., R.d.C.) and Laboratory of Cardiovascular Science (E.G.L.), National Institute on Aging, National Institutes of Health, Baltimore, MD; Faculty of Veterinary Medicine, University of Teramo, Teramo, Italy (C.D.G.); and Reynolds Oklahoma Center on Aging, Department of Geriatric Medicine, University of Oklahoma Health Science Center, Oklahoma City, OK (A.C., Z.U.)
| | - Edward G Lakatta
- From the Experimental Gerontology Section, Translational Gerontology Branch (I.A., C.D.G., M.B., R.d.C.) and Laboratory of Cardiovascular Science (E.G.L.), National Institute on Aging, National Institutes of Health, Baltimore, MD; Faculty of Veterinary Medicine, University of Teramo, Teramo, Italy (C.D.G.); and Reynolds Oklahoma Center on Aging, Department of Geriatric Medicine, University of Oklahoma Health Science Center, Oklahoma City, OK (A.C., Z.U.)
| | - Rafael de Cabo
- From the Experimental Gerontology Section, Translational Gerontology Branch (I.A., C.D.G., M.B., R.d.C.) and Laboratory of Cardiovascular Science (E.G.L.), National Institute on Aging, National Institutes of Health, Baltimore, MD; Faculty of Veterinary Medicine, University of Teramo, Teramo, Italy (C.D.G.); and Reynolds Oklahoma Center on Aging, Department of Geriatric Medicine, University of Oklahoma Health Science Center, Oklahoma City, OK (A.C., Z.U.).
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1366
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Watanabe S, Kawamoto S, Ohtani N, Hara E. Impact of senescence-associated secretory phenotype and its potential as a therapeutic target for senescence-associated diseases. Cancer Sci 2017; 108:563-569. [PMID: 28165648 PMCID: PMC5406532 DOI: 10.1111/cas.13184] [Citation(s) in RCA: 206] [Impact Index Per Article: 29.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Revised: 01/19/2017] [Accepted: 01/31/2017] [Indexed: 12/12/2022] Open
Abstract
"Cellular senescence" is a state in which cells undergo irreversible cell cycle arrest in response to a variety of cellular stresses. Once cells senesce, they are strongly resistant to any mitogens, including oncogenic stimuli. Therefore, cellular senescence has been assumed to be a potent anticancer mechanism. Although irreversible cell-cycle arrest is traditionally considered the major characteristic of senescent cells, recent studies have revealed some additional functions. Most noteworthy is the increased secretion of various secretory proteins, such as inflammatory cytokines, chemokines, growth factors, and MMPs, into the surrounding extracellular fluid. These newly recognized senescent phenotypes, termed senescence-associated secretory phenotypes (SASPs), reportedly contribute to tumor suppression, wound healing, embryonic development, and even tumorigenesis promotion. Thus, SASPs appear to be beneficial or deleterious, depending on the biological context. As senescent cells are known to accumulate during the aging process in vivo, it is quite possible that their accumulation in aged tissues promotes age-associated functional decline and various diseases, including cancers, at least to some extent. Here, we focus on and discuss the functional and regulatory network of SASPs toward opening up new possibilities for controlling aging and aging-associated diseases.
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Affiliation(s)
- Sugiko Watanabe
- Department of Molecular Microbiology, Research Institute for Microbial Diseases, Osaka University, Suita, Japan
| | - Shimpei Kawamoto
- Department of Molecular Microbiology, Research Institute for Microbial Diseases, Osaka University, Suita, Japan
| | - Naoko Ohtani
- Department of Applied Biological Science, Faculty of Science and Technology, Tokyo University of Science, Noda, Japan
| | - Eiji Hara
- Department of Molecular Microbiology, Research Institute for Microbial Diseases, Osaka University, Suita, Japan.,The Cancer Institute, Japanese Foundation for Cancer Research, Tokyo, Japan
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1367
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Cellular Senescence: A Translational Perspective. EBioMedicine 2017; 21:21-28. [PMID: 28416161 PMCID: PMC5514381 DOI: 10.1016/j.ebiom.2017.04.013] [Citation(s) in RCA: 611] [Impact Index Per Article: 87.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 04/06/2017] [Accepted: 04/06/2017] [Indexed: 12/17/2022] Open
Abstract
Cellular senescence entails essentially irreversible replicative arrest, apoptosis resistance, and frequently acquisition of a pro-inflammatory, tissue-destructive senescence-associated secretory phenotype (SASP). Senescent cells accumulate in various tissues with aging and at sites of pathogenesis in many chronic diseases and conditions. The SASP can contribute to senescence-related inflammation, metabolic dysregulation, stem cell dysfunction, aging phenotypes, chronic diseases, geriatric syndromes, and loss of resilience. Delaying senescent cell accumulation or reducing senescent cell burden is associated with delay, prevention, or alleviation of multiple senescence-associated conditions. We used a hypothesis-driven approach to discover pro-survival Senescent Cell Anti-apoptotic Pathways (SCAPs) and, based on these SCAPs, the first senolytic agents, drugs that cause senescent cells to become susceptible to their own pro-apoptotic microenvironment. Several senolytic agents, which appear to alleviate multiple senescence-related phenotypes in pre-clinical models, are beginning the process of being translated into clinical interventions that could be transformative. Cellular senescence is among the aging processes underlying chronic diseases, loss of resilience, and geriatric syndromes. Senolytics selectively induce senescent cell apoptosis. They delay or alleviate multiple disorders in preclinical studies. If senolytics are demonstrated to be effective and safe in clinical trials, they could be transformative.
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1368
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Toutfaire M, Bauwens E, Debacq-Chainiaux F. The impact of cellular senescence in skin ageing: A notion of mosaic and therapeutic strategies. Biochem Pharmacol 2017; 142:1-12. [PMID: 28408343 DOI: 10.1016/j.bcp.2017.04.011] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 04/07/2017] [Indexed: 02/07/2023]
Abstract
Cellular senescence is now recognized as one of the nine hallmarks of ageing. Recent data show the involvement of senescent cells in tissue ageing and some age-related diseases. Skin represents an ideal model for the study of ageing. Indeed, skin ageing varies between individuals depending on their chronological age but also on their exposure to various exogenous factors (mainly ultraviolet rays). If senescence traits can be detected with ageing in the skin, the senescent phenotype varies among the various skin cell types. Moreover, the origin of cellular senescence in the skin is still unknown, and multiple origins are possible. This reflects the mosaic of skin ageing. Senescent cells can interfere with their microenvironment, either via the direct secretion of factors (the senescence-associated secretory phenotype) or via other methods of communication, such as extracellular vesicles. Knowledge regarding the impact of cellular senescence on skin ageing could be integrated into dermatology research, especially to limit the appearance of senescent cells after photo(chemo)therapy or in age-related skin diseases. Therapeutic approaches include the clearance of senescent cells via the use of senolytics or via the cooperation with the immune system.
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Affiliation(s)
- Marie Toutfaire
- URBC, NAmur Research Institute for LIfe Science (NARILIS), University of Namur, Namur, Belgium
| | - Emilie Bauwens
- URBC, NAmur Research Institute for LIfe Science (NARILIS), University of Namur, Namur, Belgium
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1369
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Senotherapy: growing old and staying young? Pflugers Arch 2017; 469:1051-1059. [PMID: 28389776 DOI: 10.1007/s00424-017-1972-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 03/29/2017] [Indexed: 12/16/2022]
Abstract
Cellular senescence, which has been linked to age-related diseases, occurs during normal aging or as a result of pathological cell stress. Due to their incapacity to proliferate, senescent cells cannot contribute to normal tissue maintenance and tissue repair. Instead, senescent cells disturb the microenvironment by secreting a plethora of bioactive factors that may lead to inflammation, regenerative dysfunction and tumor progression. Recent understanding of stimuli and pathways that induce and maintain cellular senescence offers the possibility to selectively eliminate senescent cells. This novel strategy, which so far has not been tested in humans, has been coined senotherapy or senolysis. In mice, senotherapy proofed to be effective in models of accelerated aging and also during normal chronological aging. Senotherapy prolonged lifespan, rejuvenated the function of bone marrow, muscle and skin progenitor cells, improved vasomotor function and slowed down atherosclerosis progression. While initial studies used genetic approaches for the killing of senescent cells, recent approaches showed similar effects with senolytic drugs. These observations open up exciting possibilities with a great potential for clinical development. However, before the integration of senotherapy into patient care can be considered, we need further research to improve our insight into the safety and efficacy of this strategy during short- and long-term use.
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1370
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The role of cellular senescence in ageing of the placenta. Placenta 2017; 52:139-145. [DOI: 10.1016/j.placenta.2017.01.116] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 01/06/2017] [Accepted: 01/10/2017] [Indexed: 12/25/2022]
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1371
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McCulloch K, Litherland GJ, Rai TS. Cellular senescence in osteoarthritis pathology. Aging Cell 2017; 16:210-218. [PMID: 28124466 PMCID: PMC5334539 DOI: 10.1111/acel.12562] [Citation(s) in RCA: 229] [Impact Index Per Article: 32.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/25/2016] [Indexed: 12/19/2022] Open
Abstract
Cellular senescence is a state of stable proliferation arrest of cells. The senescence pathway has many beneficial effects and is seen to be activated in damaged/stressed cells, as well as during embryonic development and wound healing. However, the persistence and accumulation of senescent cells in various tissues can also impair function and have been implicated in the pathogenesis of many age‐related diseases. Osteoarthritis (OA), a severely debilitating chronic condition characterized by progressive tissue remodeling and loss of joint function, is the most prevalent disease of the synovial joints, and increasing age is the primary OA risk factor. The profile of inflammatory and catabolic mediators present during the pathogenesis of OA is strikingly similar to the secretory profile observed in ‘classical’ senescent cells. During OA, chondrocytes (the sole cell type present within articular cartilage) exhibit increased levels of various senescence markers, such as senescence‐associated beta‐galactosidase (SAβGal) activity, telomere attrition, and accumulation of p16ink4a. This suggests the hypothesis that senescence of cells within joint tissues may play a pathological role in the causation of OA. In this review, we discuss the mechanisms by which senescent cells may predispose synovial joints to the development and/or progression of OA, as well as touching upon various epigenetic alterations associated with both OA and senescence.
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Affiliation(s)
- Kendal McCulloch
- Institute of Biomedical and Environmental Health Research; University of the West of Scotland; Paisley PA1 2BE UK
| | - Gary J. Litherland
- Institute of Biomedical and Environmental Health Research; University of the West of Scotland; Paisley PA1 2BE UK
| | - Taranjit Singh Rai
- Institute of Biomedical and Environmental Health Research; University of the West of Scotland; Paisley PA1 2BE UK
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1372
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Telomeres and Cell Senescence - Size Matters Not. EBioMedicine 2017; 21:14-20. [PMID: 28347656 PMCID: PMC5514392 DOI: 10.1016/j.ebiom.2017.03.027] [Citation(s) in RCA: 203] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 03/17/2017] [Accepted: 03/17/2017] [Indexed: 12/31/2022] Open
Abstract
Telomeres are protective structures present at the ends of linear chromosomes that are important in preventing genome instability. Telomeres shorten as a result of cellular replication, leading to a permanent cell cycle arrest, also known as replicative senescence. Senescent cells have been shown to accumulate in mammalian tissue with age and in a number of age-related diseases, suggesting that they might contribute to the loss of tissue function observed with age. In this review, we will first describe evidence suggesting a key role for senescence in the ageing process and elaborate on some of the mechanisms by which telomeres can induce cellular senescence. Furthermore, we will present multiple lines of evidence suggesting that telomeres can act as sensors of both intrinsic and extrinsic stress as well as recent data indicating that telomere–induced senescence may occur irrespectively of the length of telomeres. Telomere shortening occurs with cell division and limits replicative capacity of cells, also known as replicative senescence. Senescent cells accumulate with age and in age-related diseases, and are associated with loss of tissue function with aging. Telomere damage can occur independently of length, and this has been shown to contribute to the senescent phenotype.
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1373
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Li B, Hou D, Guo H, Zhou H, Zhang S, Xu X, Liu Q, Zhang X, Zou Y, Gong Y, Shao C. Resveratrol sequentially induces replication and oxidative stresses to drive p53-CXCR2 mediated cellular senescence in cancer cells. Sci Rep 2017; 7:208. [PMID: 28303009 PMCID: PMC5428242 DOI: 10.1038/s41598-017-00315-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 02/20/2017] [Indexed: 12/11/2022] Open
Abstract
Resveratrol (RSV) acts either as an antioxidant or a pro-oxidant depending on contexts. RSV-treated cancer cells may experience replication stress that can lead to cellular senescence or apoptosis. While both oxidative and replication stresses may mediate the anti-proliferation effect of RSV, to what extent each contributes to the impaired proliferation in response to RSV remains uncharacterized. We here report the study of the roles of replication and oxidative stresses in mediating cellular senescence in cancer cells treated with RSV. RSV induced S-phase arrest and cellular senescence in a dose-dependent manner in U2OS and A549 cancer cells as well as in normal human fibroblasts. We observed that nucleosides significantly alleviated RSV-induced replication stress and DNA damage response, and consequently attenuating cellular senescence. While the elevation of reactive oxygen species (ROS) also mediated the pro-senescent effect of RSV, it occurred after S-phase arrest. However, the induction of ROS by RSV was independent of S-phase arrest and actually reinforced the latter. We also demonstrated a critical role of the p53-CXCR2 axis in mediating RSV-induced senescence. Interestingly, CXCR2 also functioned as a barrier to apoptosis. Together, our results provided more insights into the biology of RSV-induced stress and its cellular consequences.
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Affiliation(s)
- Boxuan Li
- Key Laboratory of Experimental Teratology, Ministry of Education/Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, 250012, China
| | - Dong Hou
- Key Laboratory of Experimental Teratology, Ministry of Education/Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, 250012, China
| | - Haiyang Guo
- Key Laboratory of Experimental Teratology, Ministry of Education/Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, 250012, China
| | - Haibin Zhou
- Key Laboratory of Experimental Teratology, Ministry of Education/Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, 250012, China
| | - Shouji Zhang
- Key Laboratory of Experimental Teratology, Ministry of Education/Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, 250012, China
| | - Xiuhua Xu
- Key Laboratory of Experimental Teratology, Ministry of Education/Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, 250012, China
| | - Qiao Liu
- Key Laboratory of Experimental Teratology, Ministry of Education/Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, 250012, China
| | - Xiyu Zhang
- Key Laboratory of Experimental Teratology, Ministry of Education/Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, 250012, China
| | - Yongxin Zou
- Key Laboratory of Experimental Teratology, Ministry of Education/Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, 250012, China
| | - Yaoqin Gong
- Key Laboratory of Experimental Teratology, Ministry of Education/Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, 250012, China
| | - Changshun Shao
- Key Laboratory of Experimental Teratology, Ministry of Education/Department of Molecular Medicine and Genetics, Shandong University School of Medicine, Jinan, Shandong, 250012, China. .,Department of Genetics/Human Genetics Institute of New Jersey, Rutgers University, Piscataway, NJ, 08854, USA.
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1374
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Cellular senescence mediates fibrotic pulmonary disease. Nat Commun 2017; 8:14532. [PMID: 28230051 PMCID: PMC5331226 DOI: 10.1038/ncomms14532] [Citation(s) in RCA: 942] [Impact Index Per Article: 134.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Accepted: 01/09/2017] [Indexed: 11/09/2022] Open
Abstract
Idiopathic pulmonary fibrosis (IPF) is a fatal disease characterized by interstitial remodelling, leading to compromised lung function. Cellular senescence markers are detectable within IPF lung tissue and senescent cell deletion rejuvenates pulmonary health in aged mice. Whether and how senescent cells regulate IPF or if their removal may be an efficacious intervention strategy is unknown. Here we demonstrate elevated abundance of senescence biomarkers in IPF lung, with p16 expression increasing with disease severity. We show that the secretome of senescent fibroblasts, which are selectively killed by a senolytic cocktail, dasatinib plus quercetin (DQ), is fibrogenic. Leveraging the bleomycin-injury IPF model, we demonstrate that early-intervention suicide-gene-mediated senescent cell ablation improves pulmonary function and physical health, although lung fibrosis is visibly unaltered. DQ treatment replicates benefits of transgenic clearance. Thus, our findings establish that fibrotic lung disease is mediated, in part, by senescent cells, which can be targeted to improve health and function.
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1375
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Birch J, Passos JF. Targeting the SASP to combat ageing: Mitochondria as possible intracellular allies? Bioessays 2017; 39. [DOI: 10.1002/bies.201600235] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Jodie Birch
- Institute for Cell and Molecular Biosciences, Campus for Ageing and Vitality, Newcastle University Institute for Ageing; Newcastle University; Newcastle Upon Tyne UK
| | - João F. Passos
- Institute for Cell and Molecular Biosciences, Campus for Ageing and Vitality, Newcastle University Institute for Ageing; Newcastle University; Newcastle Upon Tyne UK
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1376
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Stenvinkel P, Luttropp K, McGuinness D, Witasp A, Rashid Qureshi A, Wernerson A, Nordfors L, Schalling M, Ripsweden J, Wennberg L, Söderberg M, Bárány P, Olauson H, Shiels PG. CDKN2A/p16INK4a expression is associated with vascular progeria in chronic kidney disease. Aging (Albany NY) 2017; 9:494-507. [PMID: 28192277 PMCID: PMC5361677 DOI: 10.18632/aging.101173] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2016] [Accepted: 02/03/2017] [Indexed: 04/08/2023]
Abstract
Patients with chronic kidney disease (CKD) display a progeric vascular phenotype linked to apoptosis, cellular senescence and osteogenic transformation. This has proven intractable to modelling appropriately in model organisms. We have therefore investigated this directly in man, using for the first time validated cellular biomarkers of ageing (CDKN2A/p16INK4a, SA-β-Gal) in arterial biopsies from 61 CKD patients undergoing living donor renal transplantation. We demonstrate that in the uremic milieu, increased arterial expression of CDKN2A/p16INK4a associated with vascular progeria in CKD, independently of chronological age. The arterial expression of CDKN2A/p16INK4a was significantly higher in patients with coronary calcification (p=0.01) and associated cardiovascular disease (CVD) (p=0.004). The correlation between CDKN2A/p16INK4a and media calcification was statistically significant (p=0.0003) after correction for chronological age. We further employed correlate expression of matrix Gla protein (MGP) and runt-related transcription factor 2 (RUNX2) as additional pathognomonic markers. Higher expression of CDKN2A/p16INK4a, RUNX2 and MGP were observed in arteries with severe media calcification. The number of p16INK4a and SA-β-Gal positive cells was higher in biopsies with severe media calcification. A strong inverse correlation was observed between CDKN2A/p16INK4a expression and carboxylated osteocalcin levels. Thus, impaired vitamin K mediated carboxylation may contribute to premature vascular senescence.
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Affiliation(s)
- Peter Stenvinkel
- Division of Renal Medicine, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Karin Luttropp
- Department of Molecular Medicine and Surgery and Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Dagmara McGuinness
- Wolfson Wohl Translational Research Centre, Institute of Cancer Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Anna Witasp
- Division of Renal Medicine, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Abdul Rashid Qureshi
- Division of Renal Medicine, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Annika Wernerson
- Division of Renal Medicine, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Louise Nordfors
- Division of Renal Medicine, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
- Department of Molecular Medicine and Surgery and Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Martin Schalling
- Department of Molecular Medicine and Surgery and Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Jonaz Ripsweden
- Division of Radiology, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Stockholm, Sweden
| | - Lars Wennberg
- Division of Transplantation Surgery, Department of Clinical Science, Intervention and Technology, Karolinska University Hospital, Stockholm, Sweden
| | - Magnus Söderberg
- Pathology, Drug Safety and Metabolism, AstraZeneca, Mölndal, Sweden
| | - Peter Bárány
- Division of Renal Medicine, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Hannes Olauson
- Division of Renal Medicine, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Paul G Shiels
- Wolfson Wohl Translational Research Centre, Institute of Cancer Sciences, University of Glasgow, Glasgow, United Kingdom
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1377
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Mora AL, Bueno M, Rojas M. Mitochondria in the spotlight of aging and idiopathic pulmonary fibrosis. J Clin Invest 2017; 127:405-414. [PMID: 28145905 DOI: 10.1172/jci87440] [Citation(s) in RCA: 153] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Idiopathic pulmonary fibrosis (IPF) is a chronic age-related lung disease with high mortality that is characterized by abnormal scarring of the lung parenchyma. There has been a recent attempt to define the age-associated changes predisposing individuals to develop IPF. Age-related perturbations that are increasingly found in epithelial cells and fibroblasts from IPF lungs compared with age-matched cells from normal lungs include defective autophagy, telomere attrition, altered proteostasis, and cell senescence. These divergent processes seem to converge in mitochondrial dysfunction and metabolic distress, which potentiate maladaptation to stress and susceptibility to age-related diseases such as IPF. Therapeutic approaches that target aging processes may be beneficial for halting the progression of disease and improving quality of life in IPF patients.
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1378
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Soto-Gamez A, Demaria M. Therapeutic interventions for aging: the case of cellular senescence. Drug Discov Today 2017; 22:786-795. [PMID: 28111332 DOI: 10.1016/j.drudis.2017.01.004] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 11/30/2016] [Accepted: 01/10/2017] [Indexed: 12/19/2022]
Abstract
Organismal aging is a multifactorial process characterized by the onset of degenerative conditions and cancer. One of the key drivers of aging is cellular senescence, a state of irreversible growth arrest induced by many pro-tumorigenic stresses. Senescent cells accumulate late in life and at sites of age-related pathologies, where they contribute to disease onset and progression through complex cell and non-cell autonomous effects. Here, we summarize the mechanisms by which cellular senescence can promote aging, and we offer an extensive description of current potential pharmacological interventions for senescent cells, highlighting limitations and suggesting alternatives.
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Affiliation(s)
- Abel Soto-Gamez
- University of Groningen, European Institute for the Biology of Aging (ERIBA), University Medical Center Groningen (UMCG), Groningen, The Netherlands
| | - Marco Demaria
- University of Groningen, European Institute for the Biology of Aging (ERIBA), University Medical Center Groningen (UMCG), Groningen, The Netherlands.
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1379
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Calcinotto A, Alimonti A. Aging tumour cells to cure cancer: “pro-senescence” therapy for cancer. Swiss Med Wkly 2017; 147:w14367. [DOI: 10.57187/smw.2017.14367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Robust scientific evidence demonstrates that senescence induction in cancer works as a potent weapon to eradicate tumorigenesis. Therapies that enhance senescence not only promote a stable cell growth arrest but also work as a strong stimulus for the activation of the antitumour immune response. However, recent advances suggest that if senescent tumour cells are not cleared from the tumours, they may promote tumour progression and metastasis. In this article, we focus on concepts that are relevant to a pro-senescence therapeutic approach, including caveats, and we propose therapeutic strategies that involve the combined use of pro-senescence therapies with immunotherapies to promote the clearance of senescent tumour cells. In our opinion, these approaches may avoid potential negative effects of pro-senescence therapies and may also enhance the efficacy of currently available immunotherapies.
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1380
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Zhao J, Fuhrmann‐Stroissnigg H, Gurkar AU, Flores RR, Dorronsoro A, Stolz DB, St. Croix CM, Niedernhofer LJ, Robbins PD. Quantitative Analysis of Cellular Senescence in Culture and In Vivo. ACTA ACUST UNITED AC 2017; 79:9.51.1-9.51.25. [DOI: 10.1002/cpcy.16] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Jing Zhao
- Department of Metabolism and Aging, The Scripps Research Institute Jupiter Florida
| | | | - Aditi U. Gurkar
- Department of Metabolism and Aging, The Scripps Research Institute Jupiter Florida
| | - Rafael R. Flores
- Department of Metabolism and Aging, The Scripps Research Institute Jupiter Florida
| | - Akaitz Dorronsoro
- Department of Metabolism and Aging, The Scripps Research Institute Jupiter Florida
| | - Donna B. Stolz
- Department of Cell Biology, University of Pittsburgh School of Medicine Pittsburgh Pennsylvania
| | - Claudette M. St. Croix
- Department of Cell Biology, University of Pittsburgh School of Medicine Pittsburgh Pennsylvania
| | | | - Paul D. Robbins
- Department of Metabolism and Aging, The Scripps Research Institute Jupiter Florida
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1381
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de Keizer PL. The Fountain of Youth by Targeting Senescent Cells? Trends Mol Med 2017; 23:6-17. [DOI: 10.1016/j.molmed.2016.11.006] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Revised: 11/16/2016] [Accepted: 11/17/2016] [Indexed: 12/19/2022]
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1382
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Fielder E, von Zglinicki T, Jurk D. The DNA Damage Response in Neurons: Die by Apoptosis or Survive in a Senescence-Like State? J Alzheimers Dis 2017; 60:S107-S131. [PMID: 28436392 DOI: 10.3233/jad-161221] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Neurons are exposed to high levels of DNA damage from both physiological and pathological sources. Neurons are post-mitotic and their loss cannot be easily recovered from; to cope with DNA damage a complex pathway called the DNA damage response (DDR) has evolved. This recognizes the damage, and through kinases such as ataxia-telangiectasia mutated (ATM) recruits and activates downstream factors that mediate either apoptosis or survival. This choice between these opposing outcomes integrates many inputs primarily through a number of key cross-road proteins, including ATM, p53, and p21. Evidence of re-entry into the cell-cycle by neurons can be seen in aging and diseases such as Alzheimer's disease. This aberrant cell-cycle re-entry is lethal and can lead to the apoptotic death of the neuron. Many downstream factors of the DDR promote cell-cycle arrest in response to damage and appear to protect neurons from apoptotic death. However, neurons surviving with a persistently activated DDR show all the features known from cell senescence; including metabolic dysregulation, mitochondrial dysfunction, and the hyper-production of pro-oxidant, pro-inflammatory and matrix-remodeling factors. These cells, termed senescence-like neurons, can negatively influence the extracellular environment and may promote induction of the same phenotype in surrounding cells, as well as driving aging and age-related diseases. Recently developed interventions targeting the DDR and/or the senescent phenotype in a range of non-neuronal tissues are being reviewed as they might become of therapeutic interest in neurodegenerative diseases.
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Affiliation(s)
- Edward Fielder
- The Ageing Biology Centre and Institute for Cell and Molecular Biology, Newcastle University, Newcastle Upon Tyne, UK
| | - Thomas von Zglinicki
- The Ageing Biology Centre and Institute for Cell and Molecular Biology, Newcastle University, Newcastle Upon Tyne, UK
| | - Diana Jurk
- The Ageing Biology Centre and Institute for Cell and Molecular Biology, Newcastle University, Newcastle Upon Tyne, UK
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1383
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Mária J, Ingrid Ž. Effects of bioactive compounds on senescence and components of senescence associated secretory phenotypes in vitro. Food Funct 2017; 8:2394-2418. [DOI: 10.1039/c7fo00161d] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Senescence is a permanent cell cycle arrest that is accompanied by changes in cell morphology and physiology occurringin vitroandin vivo.
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Affiliation(s)
- Janubová Mária
- Institute of Medical Chemistry
- Biochemistry and Clinical Biochemistry
- Medical Faculty
- Comenius University
- 813 72 Bratislava
| | - Žitňanová Ingrid
- Institute of Medical Chemistry
- Biochemistry and Clinical Biochemistry
- Medical Faculty
- Comenius University
- 813 72 Bratislava
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1384
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Shiloh Y, Lederman HM. Ataxia-telangiectasia (A-T): An emerging dimension of premature ageing. Ageing Res Rev 2017; 33:76-88. [PMID: 27181190 DOI: 10.1016/j.arr.2016.05.002] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 05/02/2016] [Accepted: 05/10/2016] [Indexed: 12/28/2022]
Abstract
A-T is a prototype genome instability syndrome and a multifaceted disease. A-T leads to neurodegeneration - primarily cerebellar atrophy, immunodeficiency, oculocutaneous telangiectasia (dilated blood vessels), vestigial thymus and gonads, endocrine abnormalities, cancer predisposition and varying sensitivity to DNA damaging agents, particularly those that induce DNA double-strand breaks. With the recent increase in life expectancy of A-T patients, the premature ageing component of this disease is gaining greater awareness. The complex A-T phenotype reflects the ever growing number of functions assigned to the protein encoded by the responsible gene - the homeostatic protein kinase, ATM. The quest to thoroughly understand the complex A-T phenotype may reveal yet elusive ATM functions.
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1385
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Abstract
Usually, cells balance their growth with their division. Coordinating growth inputs with cell division ensures the proper timing of division when sufficient cell material is available and affects the overall rate of cell proliferation. At a very fundamental level, cellular replicative lifespan-defined as the number of times a cell can divide, is a manifestation of cell cycle control. Hence, control of mitotic cell divisions, especially when the commitment is made to a new round of cell division, is intimately linked to replicative aging of cells. In this chapter, we review our current understanding, and its shortcomings, of how unbalanced growth and division, can dramatically influence the proliferative potential of cells, often leading to cellular and organismal aging phenotypes. The interplay between growth and division also underpins cellular senescence (i.e., inability to divide) and quiescence, when cells exit the cell cycle but still retain their ability to divide.
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1386
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Barzilai A, Schumacher B, Shiloh Y. Genome instability: Linking ageing and brain degeneration. Mech Ageing Dev 2017; 161:4-18. [DOI: 10.1016/j.mad.2016.03.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 03/23/2016] [Accepted: 03/26/2016] [Indexed: 02/06/2023]
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1387
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Sturmlechner I, Durik M, Sieben CJ, Baker DJ, van Deursen JM. Cellular senescence in renal ageing and disease. Nat Rev Nephrol 2016; 13:77-89. [DOI: 10.1038/nrneph.2016.183] [Citation(s) in RCA: 184] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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1388
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Chiche A, Le Roux I, von Joest M, Sakai H, Aguín SB, Cazin C, Salam R, Fiette L, Alegria O, Flamant P, Tajbakhsh S, Li H. Injury-Induced Senescence Enables In Vivo Reprogramming in Skeletal Muscle. Cell Stem Cell 2016; 20:407-414.e4. [PMID: 28017795 DOI: 10.1016/j.stem.2016.11.020] [Citation(s) in RCA: 202] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Revised: 07/26/2016] [Accepted: 11/29/2016] [Indexed: 12/22/2022]
Abstract
In vivo reprogramming is a promising approach for tissue regeneration in response to injury. Several examples of in vivo reprogramming have been reported in a variety of lineages, but some including skeletal muscle have so far proven refractory. Here, we show that acute and chronic injury enables transcription-factor-mediated reprogramming in skeletal muscle. Lineage tracing indicates that this response frequently originates from Pax7+ muscle stem cells. Injury is associated with accumulation of senescent cells, and advanced aging or local irradiation further enhanced in vivo reprogramming, while selective elimination of senescent cells reduced reprogramming efficiency. The effect of senescence appears to be, at least in part, due to the release of interleukin 6 (IL-6), suggesting a potential link with the senescence-associated secretory phenotype. Collectively, our findings highlight a beneficial paracrine effect of injury-induced senescence on cellular plasticity, which will be important for devising strategies for reprogramming-based tissue repair.
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Affiliation(s)
- Aurélie Chiche
- Cellular Plasticity & Disease Modelling, Department of Developmental & Stem Cell Biology, Institut Pasteur, 25 Rue du Dr Roux, Paris 75015, France; CNRS, UMR3738, Rue du Dr Roux, Paris 75015, France
| | - Isabelle Le Roux
- Stem Cells & Development, Department of Developmental & Stem Cell Biology, Institut Pasteur, 25 Rue du Dr Roux, Paris 75015, France
| | - Mathieu von Joest
- Cellular Plasticity & Disease Modelling, Department of Developmental & Stem Cell Biology, Institut Pasteur, 25 Rue du Dr Roux, Paris 75015, France; CNRS, UMR3738, Rue du Dr Roux, Paris 75015, France
| | - Hiroshi Sakai
- Stem Cells & Development, Department of Developmental & Stem Cell Biology, Institut Pasteur, 25 Rue du Dr Roux, Paris 75015, France; CNRS, UMR3738, Rue du Dr Roux, Paris 75015, France
| | - Sabela Búa Aguín
- Cellular Plasticity & Disease Modelling, Department of Developmental & Stem Cell Biology, Institut Pasteur, 25 Rue du Dr Roux, Paris 75015, France; CNRS, UMR3738, Rue du Dr Roux, Paris 75015, France
| | - Coralie Cazin
- Cellular Plasticity & Disease Modelling, Department of Developmental & Stem Cell Biology, Institut Pasteur, 25 Rue du Dr Roux, Paris 75015, France; CNRS, UMR3738, Rue du Dr Roux, Paris 75015, France
| | - Rana Salam
- Cellular Plasticity & Disease Modelling, Department of Developmental & Stem Cell Biology, Institut Pasteur, 25 Rue du Dr Roux, Paris 75015, France
| | - Laurence Fiette
- Human Histopathology and Animal Models, Department of Infection & Epidemiology, Institut Pasteur, 25 Rue du Dr Roux, Paris 75015, France
| | - Olinda Alegria
- Cellular Plasticity & Disease Modelling, Department of Developmental & Stem Cell Biology, Institut Pasteur, 25 Rue du Dr Roux, Paris 75015, France; CNRS, UMR3738, Rue du Dr Roux, Paris 75015, France
| | - Patricia Flamant
- Human Histopathology and Animal Models, Department of Infection & Epidemiology, Institut Pasteur, 25 Rue du Dr Roux, Paris 75015, France
| | - Shahragim Tajbakhsh
- Stem Cells & Development, Department of Developmental & Stem Cell Biology, Institut Pasteur, 25 Rue du Dr Roux, Paris 75015, France; CNRS, UMR3738, Rue du Dr Roux, Paris 75015, France.
| | - Han Li
- Cellular Plasticity & Disease Modelling, Department of Developmental & Stem Cell Biology, Institut Pasteur, 25 Rue du Dr Roux, Paris 75015, France; CNRS, UMR3738, Rue du Dr Roux, Paris 75015, France.
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1389
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James EL, Lane JAE, Michalek RD, Karoly ED, Parkinson EK. Replicatively senescent human fibroblasts reveal a distinct intracellular metabolic profile with alterations in NAD+ and nicotinamide metabolism. Sci Rep 2016; 6:38489. [PMID: 27924925 PMCID: PMC5141431 DOI: 10.1038/srep38489] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 11/11/2016] [Indexed: 12/30/2022] Open
Abstract
Cellular senescence occurs by proliferative exhaustion (PEsen) or following multiple cellular stresses but had not previously been subject to detailed metabolomic analysis. Therefore, we compared PEsen fibroblasts with proliferating and transiently growth arrested controls using a combination of different mass spectroscopy techniques. PEsen cells showed many specific alterations in both the NAD+ de novo and salvage pathways including striking accumulations of nicotinamide mononucleotide (NMN) and nicotinamide riboside (NR) in the amidated salvage pathway despite no increase in nicotinamide phosphoribosyl transferase or in the NR transport protein, CD73. Extracellular nicotinate was depleted and metabolites of the deamidated salvage pathway were reduced but intracellular NAD+ and nicotinamide were nevertheless maintained. However, sirtuin 1 was downregulated and so the accumulation of NMN and NR was best explained by reduced flux through the amidated arm of the NAD+ salvage pathway due to reduced sirtuin activity. PEsen cells also showed evidence of increased redox homeostasis and upregulated pathways used to generate energy and cellular membranes; these included nucleotide catabolism, membrane lipid breakdown and increased creatine metabolism. Thus PEsen cells upregulate several different pathways to sustain their survival which may serve as pharmacological targets for the elimination of senescent cells in age-related disease.
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Affiliation(s)
- Emma L James
- Centre for Clinical &Diagnostic Oral Sciences, Institute of Dentistry, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, Turner Street, London, E1 2AD, UK
| | - James A E Lane
- Centre for Clinical &Diagnostic Oral Sciences, Institute of Dentistry, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, Turner Street, London, E1 2AD, UK
| | - Ryan D Michalek
- Metabolon, Inc. 617 Davis Drive, Suite 400, Durham, NC, 27713, USA
| | - Edward D Karoly
- Metabolon, Inc. 617 Davis Drive, Suite 400, Durham, NC, 27713, USA
| | - E Kenneth Parkinson
- Centre for Clinical &Diagnostic Oral Sciences, Institute of Dentistry, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, Turner Street, London, E1 2AD, UK
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1390
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Kohanski RA, Deeks SG, Gravekamp C, Halter JB, High K, Hurria A, Fuldner R, Green P, Huebner R, Macchiarini F, Sierra F. Reverse geroscience: how does exposure to early diseases accelerate the age-related decline in health? Ann N Y Acad Sci 2016; 1386:30-44. [PMID: 27907230 DOI: 10.1111/nyas.13297] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 10/21/2016] [Indexed: 02/07/2023]
Abstract
Aging is the major risk factor for both the development of chronic diseases and loss of functional capacity. Geroscience provides links among the biology of aging, the biology of disease, and the physiology of frailty, three fields where enormous progress has been made in the last few decades. While, previously, the focus was on the role of aging in susceptibility to disease and disability, the other side of this relationship, which is the contribution of disease to aging, has been less explored at the molecular/cellular level. Indeed, the role of childhood or early adulthood exposure to chronic disease and/or treatment on accelerating aging phenotypes is well known in epidemiology, but the biological basis is poorly understood. A recent summit co-organized by the National Institutes of Health GeroScience Interest Group and the New York Academy of Sciences explored these relationships, using three chronic diseases as examples: cancer, HIV/AIDS, and diabetes. The epidemiological literature clearly indicates that early exposure to any of these diseases and/or their treatments results in an acceleration of the appearance of aging phenotypes, including loss of functional capacity and accelerated appearance of clinical symptoms of aging-related diseases not obviously related to the earlier event. The discussions at the summit focused on the molecular and cellular relationships between each of these diseases and the recently defined molecular and cellular pillars of aging. Two major conclusions from the meeting include the desire to refine an operational definition of aging and to concomitantly develop biomarkers of aging, in order to move from chronological to physiological age. The discussion also opened a dialogue on the possibility of improving late-life outcomes in patients affected by chronic disease by including age-delaying modalities along with the standard care for the disease in question.
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Affiliation(s)
- Ronald A Kohanski
- Division of Aging Biology, National Institute on Aging, NIH, Bethesda, Maryland
| | - Steven G Deeks
- Department of Medicine, University of California San Francisco, San Francisco, California
| | - Claudia Gravekamp
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, New York
| | - Jeffrey B Halter
- Geriatrics Center and Institute of Gerontology, University of Michigan, Ann Arbor, Michigan
| | - Kevin High
- Department of Internal Medicine, Section on Infectious Diseases, Wake Forest School of Medicine, Winston-Salem, North Carolina
| | - Arti Hurria
- City of Hope Comprehensive Cancer Center and Beckman Research Institute, Duarte, California
| | - Rebecca Fuldner
- Division of Aging Biology, National Institute on Aging, NIH, Bethesda, Maryland
| | - Paige Green
- Biobehavioral and Psychologic Branch, National Cancer Institute, NIH, Bethesda, Maryland
| | - Robin Huebner
- Division of AIDS, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland
| | | | - Felipe Sierra
- Division of Aging Biology, National Institute on Aging, NIH, Bethesda, Maryland
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1391
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Figueira I, Fernandes A, Mladenovic Djordjevic A, Lopez-Contreras A, Henriques CM, Selman C, Ferreiro E, Gonos ES, Trejo JL, Misra J, Rasmussen LJ, Xapelli S, Ellam T, Bellantuono I. Interventions for age-related diseases: Shifting the paradigm. Mech Ageing Dev 2016; 160:69-92. [DOI: 10.1016/j.mad.2016.09.009] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2016] [Revised: 09/18/2016] [Accepted: 09/28/2016] [Indexed: 12/14/2022]
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1392
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Petrova NV, Velichko AK, Razin SV, Kantidze OL. Small molecule compounds that induce cellular senescence. Aging Cell 2016; 15:999-1017. [PMID: 27628712 PMCID: PMC6398529 DOI: 10.1111/acel.12518] [Citation(s) in RCA: 129] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/19/2016] [Indexed: 12/12/2022] Open
Abstract
To date, dozens of stress‐induced cellular senescence phenotypes have been reported. These cellular senescence states may differ substantially from each other, as well as from replicative senescence through the presence of specific senescence features. Here, we attempted to catalog virtually all of the cellular senescence‐like states that can be induced by low molecular weight compounds. We summarized biological markers, molecular pathways involved in senescence establishment, and specific traits of cellular senescence states induced by more than fifty small molecule compounds.
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Affiliation(s)
| | - Artem K. Velichko
- Institute of Gene Biology RAS 34/5 Vavilova Street 119334 Moscow Russia
| | - Sergey V. Razin
- Institute of Gene Biology RAS 34/5 Vavilova Street 119334 Moscow Russia
- Department of Molecular Biology Lomonosov Moscow State University 119991 Moscow Russia
- LIA 1066 French‐Russian Joint Cancer Research Laboratory 94805 Villejuif France
| | - Omar L. Kantidze
- Institute of Gene Biology RAS 34/5 Vavilova Street 119334 Moscow Russia
- LIA 1066 French‐Russian Joint Cancer Research Laboratory 94805 Villejuif France
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1393
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Chen NC, Partridge AT, Sell C, Torres C, Martín-García J. Fate of microglia during HIV-1 infection: From activation to senescence? Glia 2016; 65:431-446. [PMID: 27888531 DOI: 10.1002/glia.23081] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 09/12/2016] [Accepted: 09/20/2016] [Indexed: 12/14/2022]
Abstract
Microglia support productive human immunodeficiency virus type 1 (HIV-1) infection and disturbed microglial function could contribute to the development of HIV-associated neurocognitive disorders (HAND). Better understanding of how HIV-1 infection and viral protein exposure modulate microglial function during the course of infection could lead to the identification of novel therapeutic targets for both the eradication of HIV-1 reservoir and treatment of neurocognitive deficits. This review first describes microglial origins and function in the normal central nervous system (CNS), and the changes that occur during aging. We then critically discuss how HIV-1 infection and exposure to viral proteins such as Tat and gp120 affect various aspects of microglial homeostasis including activation, cellular metabolism and cell cycle regulation, through pathways implicated in cellular stress responses including p38 mitogen-activated protein kinase (MAPK) and nuclear factor κB (NF-κB). We thus propose that the functions of human microglia evolve during both healthy and pathological aging. Aging-associated dysfunction of microglia comprises phenotypes resembling cellular senescence, which could contribute to cognitive impairments observed in various neurodegenerative diseases. In addition, microglia seems to develop characteristics that could be related to cellular senescence post-HIV-1 infection and after exposure to HIV-1 viral proteins. However, despite its potential role as a component of HAND and likely other neurocognitive disorders, microglia senescence has not been well characterized and should be the focus of future studies, which could have high translational relevance. GLIA 2017;65:431-446.
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Affiliation(s)
- Natalie C Chen
- Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, Pennsylvania.,MD/PhD Program, Drexel University College of Medicine, Philadelphia, Pennsylvania.,Molecular and Cell Biology and Genetics Graduate Program, Drexel University College of Medicine, Philadelphia, Pennsylvania
| | - Andrea T Partridge
- Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, Pennsylvania.,Microbiology and Immunology Graduate Program, Drexel University College of Medicine, Philadelphia, Pennsylvania
| | - Christian Sell
- Department of Pathology and Laboratory Medicine, Drexel University College of Medicine, Philadelphia, Pennsylvania
| | - Claudio Torres
- Department of Pathology and Laboratory Medicine, Drexel University College of Medicine, Philadelphia, Pennsylvania
| | - Julio Martín-García
- Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, Pennsylvania.,Center for Molecular Virology and Translational Neuroscience, Institute for Molecular Medicine and Infectious Disease, Drexel University College of Medicine, Philadelphia, Pennsylvania
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1394
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Wang Y, Chang J, Liu X, Zhang X, Zhang S, Zhang X, Zhou D, Zheng G. Discovery of piperlongumine as a potential novel lead for the development of senolytic agents. Aging (Albany NY) 2016; 8:2915-2926. [PMID: 27913811 PMCID: PMC5191878 DOI: 10.18632/aging.101100] [Citation(s) in RCA: 161] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 11/04/2016] [Indexed: 04/16/2023]
Abstract
Accumulating evidence indicates that senescent cells play an important role in many age-associated diseases. The pharmacological depletion of senescent cells (SCs) with a "senolytic agent", a small molecule that selectively kills SCs, is a potential novel therapeutic approach for these diseases. Recently, we discovered ABT-263, a potent and highly selective senolytic agent, by screening a library of rationally-selected compounds. With this screening approach, we also identified a second senolytic agent called piperlongumine (PL). PL is a natural product that is reported to have many pharmacological effects, including anti-tumor activity. We show here that PL preferentially killed senescent human WI-38 fibroblasts when senescence was induced by ionizing radiation, replicative exhaustion, or ectopic expression of the oncogene Ras. PL killed SCs by inducing apoptosis, and this process did not require the induction of reactive oxygen species. In addition, we found that PL synergistically killed SCs in combination with ABT-263, and initial structural modifications to PL identified analogs with improved potency and/or selectivity in inducing SC death. Overall, our studies demonstrate that PL is a novel lead for developing senolytic agents.
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Affiliation(s)
- Yingying Wang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
- Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Jianhui Chang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
- Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Xingui Liu
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Xuan Zhang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Suping Zhang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
- Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Xin Zhang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
- Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Daohong Zhou
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
- Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Guangrong Zheng
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
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1395
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Abstract
Individuals age >65 years old are the fastest expanding population demographic throughout the developed world. Consequently, more aged patients than before are receiving diagnoses of impaired renal function and nephrosclerosis-age-associated histologic changes in the kidneys. Recent studies have shown that the aged kidney undergoes a range of structural changes and has altered transcriptomic, hemodynamic, and physiologic behavior at rest and in response to renal insults. These changes impair the ability of the kidney to withstand and recover from injury, contributing to the high susceptibility of the aged population to AKI and their increased propensity to develop subsequent progressive CKD. In this review, we examine these features of the aged kidney and explore the various validated and putative pathways contributing to the changes observed with aging in both experimental animal models and humans. We also discuss the potential for additional study to increase understanding of the aged kidney and lead to novel therapeutic strategies.
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Affiliation(s)
- Eoin D O'Sullivan
- Department of Renal Medicine, Royal Infirmary of Edinburgh, Edinburgh, United Kingdom;
| | - Jeremy Hughes
- Department of Renal Medicine, Royal Infirmary of Edinburgh, Edinburgh, United Kingdom.,MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom; and
| | - David A Ferenbach
- Department of Renal Medicine, Royal Infirmary of Edinburgh, Edinburgh, United Kingdom.,MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom; and.,Renal and.,Biomedical Engineering Divisions, Brigham and Women's Hospital, Department of Medicine, Harvard Medical School, Boston, Massachusetts
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1396
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Farr JN, Fraser DG, Wang H, Jaehn K, Ogrodnik MB, Weivoda MM, Drake MT, Tchkonia T, LeBrasseur NK, Kirkland JL, Bonewald LF, Pignolo RJ, Monroe DG, Khosla S. Identification of Senescent Cells in the Bone Microenvironment. J Bone Miner Res 2016; 31:1920-1929. [PMID: 27341653 PMCID: PMC5289710 DOI: 10.1002/jbmr.2892] [Citation(s) in RCA: 321] [Impact Index Per Article: 40.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Revised: 06/04/2016] [Accepted: 06/20/2016] [Indexed: 12/27/2022]
Abstract
Cellular senescence is a fundamental mechanism by which cells remain metabolically active yet cease dividing and undergo distinct phenotypic alterations, including upregulation of p16Ink4a , profound secretome changes, telomere shortening, and decondensation of pericentromeric satellite DNA. Because senescent cells accumulate in multiple tissues with aging, these cells and the dysfunctional factors they secrete, termed the senescence-associated secretory phenotype (SASP), are increasingly recognized as promising therapeutic targets to prevent age-related degenerative pathologies, including osteoporosis. However, the cell type(s) within the bone microenvironment that undergoes senescence with aging in vivo has remained poorly understood, largely because previous studies have focused on senescence in cultured cells. Thus in young (age 6 months) and old (age 24 months) mice, we measured senescence and SASP markers in vivo in highly enriched cell populations, all rapidly isolated from bone/marrow without in vitro culture. In both females and males, p16Ink4a expression by real-time quantitative polymerase chain reaction (rt-qPCR) was significantly higher with aging in B cells, T cells, myeloid cells, osteoblast progenitors, osteoblasts, and osteocytes. Further, in vivo quantification of senescence-associated distension of satellites (SADS), ie, large-scale unraveling of pericentromeric satellite DNA, revealed significantly more senescent osteocytes in old compared with young bone cortices (11% versus 2%, p < 0.001). In addition, primary osteocytes from old mice had sixfold more (p < 0.001) telomere dysfunction-induced foci (TIFs) than osteocytes from young mice. Corresponding with the age-associated accumulation of senescent osteocytes was significantly higher expression of multiple SASP markers in osteocytes from old versus young mice, several of which also showed dramatic age-associated upregulation in myeloid cells. These data show that with aging, a subset of cells of various lineages within the bone microenvironment become senescent, although senescent myeloid cells and senescent osteocytes predominantly develop the SASP. Given the critical roles of osteocytes in orchestrating bone remodeling, our findings suggest that senescent osteocytes and their SASP may contribute to age-related bone loss. © 2016 American Society for Bone and Mineral Research.
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Affiliation(s)
- Joshua N Farr
- Robert and Arlene Kogod Center on Aging and Endocrine Research Unit, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Daniel G Fraser
- Robert and Arlene Kogod Center on Aging and Endocrine Research Unit, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Haitao Wang
- Departments of Orthopaedic Surgery and Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Katharina Jaehn
- Department of Oral Biology, University of Missouri-Kansas City, School of Dentistry, Kansas City, MO, USA
| | - Mikolaj B Ogrodnik
- Robert and Arlene Kogod Center on Aging and Endocrine Research Unit, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Megan M Weivoda
- Robert and Arlene Kogod Center on Aging and Endocrine Research Unit, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Matthew T Drake
- Robert and Arlene Kogod Center on Aging and Endocrine Research Unit, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Tamara Tchkonia
- Robert and Arlene Kogod Center on Aging and Endocrine Research Unit, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Nathan K LeBrasseur
- Robert and Arlene Kogod Center on Aging and Endocrine Research Unit, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - James L Kirkland
- Robert and Arlene Kogod Center on Aging and Endocrine Research Unit, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Lynda F Bonewald
- Department of Oral Biology, University of Missouri-Kansas City, School of Dentistry, Kansas City, MO, USA
| | - Robert J Pignolo
- Departments of Orthopaedic Surgery and Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - David G Monroe
- Robert and Arlene Kogod Center on Aging and Endocrine Research Unit, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Sundeep Khosla
- Robert and Arlene Kogod Center on Aging and Endocrine Research Unit, Mayo Clinic College of Medicine, Rochester, MN, USA
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1397
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Sims NA. Senescent Osteocytes: Do They Cause Damage and Can They Be Targeted to Preserve the Skeleton? J Bone Miner Res 2016; 31:1917-1919. [PMID: 27653182 DOI: 10.1002/jbmr.2994] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 09/09/2016] [Accepted: 09/13/2016] [Indexed: 02/01/2023]
Affiliation(s)
- Natalie A Sims
- St. Vincent's Institute of Medical Research, Fitzroy, Australia.,Department of Medicine at St. Vincent's Hospital, The University of Melbourne, Fitzroy, Australia
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1398
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Pazoki-Toroudi H, Amani H, Ajami M, Nabavi SF, Braidy N, Kasi PD, Nabavi SM. Targeting mTOR signaling by polyphenols: A new therapeutic target for ageing. Ageing Res Rev 2016; 31:55-66. [PMID: 27453478 DOI: 10.1016/j.arr.2016.07.004] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Revised: 06/19/2016] [Accepted: 07/15/2016] [Indexed: 12/19/2022]
Abstract
Current ageing research is aimed not only at the promotion of longevity, but also at improving health span through the discovery and development of new therapeutic strategies by investigating molecular and cellular pathways involved in cellular senescence. Understanding the mechanism of action of polyphenolic compounds targeting mTOR (mechanistic target of rapamycin) and related pathways opens up new directions to revolutionize ways to slow down the onset and development of age-dependent degeneration. Herein, we will discuss the mechanisms by which polyphenols can delay the molecular pathogenesis of ageing via manipulation or more specifically inhibition of mTOR-signaling pathways. We will also discuss the implications of polyphenols in targeting mTOR and its related pathways on health life span extension and longevity..
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1399
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Bochenek ML, Schütz E, Schäfer K. Endothelial cell senescence and thrombosis: Ageing clots. Thromb Res 2016; 147:36-45. [DOI: 10.1016/j.thromres.2016.09.019] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 09/16/2016] [Accepted: 09/17/2016] [Indexed: 01/28/2023]
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1400
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Vaiserman AM, Lushchak OV, Koliada AK. Anti-aging pharmacology: Promises and pitfalls. Ageing Res Rev 2016; 31:9-35. [PMID: 27524412 DOI: 10.1016/j.arr.2016.08.004] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2016] [Revised: 08/06/2016] [Accepted: 08/09/2016] [Indexed: 12/12/2022]
Abstract
Life expectancy has grown dramatically in modern times. This increase, however, is not accompanied by the same increase in healthspan. Efforts to extend healthspan through pharmacological agents targeting aging-related pathological changes are now in the spotlight of geroscience, the main idea of which is that delaying of aging is far more effective than preventing the particular chronic disorders. Currently, anti-aging pharmacology is a rapidly developing discipline. It is a preventive field of health care, as opposed to conventional medicine which focuses on treating symptoms rather than root causes of illness. A number of pharmacological agents targeting basic aging pathways (i.e., calorie restriction mimetics, autophagy inducers, senolytics etc.) are now under investigation. This review summarizes the literature related to advances, perspectives and challenges in the field of anti-aging pharmacology.
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Affiliation(s)
| | - Oleh V Lushchak
- Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
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