1
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Riddle NC, Biga PR, Bronikowski AM, Walters JR, Wilkinson GS. Comparative analysis of animal lifespan. GeroScience 2024; 46:171-181. [PMID: 37889438 PMCID: PMC10828364 DOI: 10.1007/s11357-023-00984-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 10/15/2023] [Indexed: 10/28/2023] Open
Abstract
Comparative studies of aging are a promising approach to identifying general properties of and processes leading to aging. While to date, many comparative studies of aging in animals have focused on relatively narrow species groups, methodological innovations now allow for studies that include evolutionary distant species. However, comparative studies of aging across a wide range of species that have distinct life histories introduce additional challenges in experimental design. Here, we discuss these challenges, highlight the most pressing problems that need to be solved, and provide suggestions based on current approaches to successfully carry out comparative aging studies across the animal kingdom.
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Affiliation(s)
- Nicole C Riddle
- Department of Biology, University of Alabama at Birmingham, Birmingham, AL, USA.
| | - Peggy R Biga
- Department of Biology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Anne M Bronikowski
- Department of Integrative Biology, Kellogg Biological Station, Michigan State University, Hickory Corners, MI, USA
| | - James R Walters
- Department of Ecology and Evolutionary Biology, The University of Kansas, Lawrence, KS, USA
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2
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Gaertner K, Michell C, Tapanainen R, Goffart S, Saari S, Soininmäki M, Dufour E, Pohjoismäki JLO. Molecular phenotyping uncovers differences in basic housekeeping functions among closely related species of hares (
Lepus
spp., Lagomorpha: Leporidae). Mol Ecol 2022. [PMID: 36320183 DOI: 10.1111/mec.16755] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 09/16/2022] [Accepted: 10/06/2022] [Indexed: 11/15/2022]
Abstract
Speciation is a fundamental evolutionary process, which results in genetic differentiation of populations and manifests as discrete morphological, physiological and behavioural differences. Each species has travelled its own evolutionary trajectory, influenced by random drift and driven by various types of natural selection, making the association of genetic differences between the species with the phenotypic differences extremely complex to dissect. In the present study, we have used an in vitro model to analyse in depth the genetic and gene regulation differences between fibroblasts of two closely related mammals, the arctic/subarctic mountain hare (Lepus timidus Linnaeus) and the temperate steppe-climate adapted brown hare (Lepus europaeus Pallas). We discovered the existence of a species-specific expression pattern of 1623 genes, manifesting in differences in cell growth, cell cycle control, respiration, and metabolism. Interspecific differences in the housekeeping functions of fibroblast cells suggest that speciation acts on fundamental cellular processes, even in these two interfertile species. Our results help to understand the molecular constituents of a species difference on a cellular level, which could contribute to the maintenance of the species boundary.
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Affiliation(s)
- Kateryna Gaertner
- Mitochondrial Bioenergetics and Metabolism, Faculty of Medicine and Health Technology FI‐33014 Tampere University Tampere Finland
| | - Craig Michell
- Department of Environmental and Biological Sciences FI‐80101 University of Eastern Finland Kuopio Finland
- Red Sea Research Center, Division of Biological and Environmental Science and Engineering King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia
| | - Riikka Tapanainen
- Department of Environmental and Biological Sciences FI‐80101 University of Eastern Finland Kuopio Finland
| | - Steffi Goffart
- Department of Environmental and Biological Sciences FI‐80101 University of Eastern Finland Kuopio Finland
| | - Sina Saari
- Mitochondrial Bioenergetics and Metabolism, Faculty of Medicine and Health Technology FI‐33014 Tampere University Tampere Finland
| | - Manu Soininmäki
- Department of Environmental and Biological Sciences FI‐80101 University of Eastern Finland Kuopio Finland
| | - Eric Dufour
- Mitochondrial Bioenergetics and Metabolism, Faculty of Medicine and Health Technology FI‐33014 Tampere University Tampere Finland
| | - Jaakko L. O. Pohjoismäki
- Department of Environmental and Biological Sciences FI‐80101 University of Eastern Finland Kuopio Finland
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3
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Harper JM, Holmes DJ. New Perspectives on Avian Models for Studies of Basic Aging Processes. Biomedicines 2021; 9:biomedicines9060649. [PMID: 34200297 PMCID: PMC8230007 DOI: 10.3390/biomedicines9060649] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/28/2021] [Accepted: 05/29/2021] [Indexed: 12/18/2022] Open
Abstract
Avian models have the potential to elucidate basic cellular and molecular mechanisms underlying the slow aging rates and exceptional longevity typical of this group of vertebrates. To date, most studies of avian aging have focused on relatively few of the phenomena now thought to be intrinsic to the aging process, but primarily on responses to oxidative stress and telomere dynamics. But a variety of whole-animal and cell-based approaches to avian aging and stress resistance have been developed-especially the use of primary cell lines and isolated erythrocytes-which permit other processes to be investigated. In this review, we highlight newer studies using these approaches. We also discuss recent research on age-related changes in neural function in birds in the context of sensory changes relevant to homing and navigation, as well as the maintenance of song. More recently, with the advent of "-omic" methodologies, including whole-genome studies, new approaches have gained momentum for investigating the mechanistic basis of aging in birds. Overall, current research suggests that birds exhibit an enhanced resistance to the detrimental effects of oxidative damage and maintain higher than expected levels of cellular function as they age. There is also evidence that genetic signatures associated with cellular defenses, as well as metabolic and immune function, are enhanced in birds but data are still lacking relative to that available from more conventional model organisms. We are optimistic that continued development of avian models in geroscience, especially under controlled laboratory conditions, will provide novel insights into the exceptional longevity of this animal taxon.
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Affiliation(s)
- James M. Harper
- Department of Biological Sciences, Sam Houston State University, Huntsville, TX 77341, USA
- Correspondence: ; Tel.: +1-936-294-1543
| | - Donna J. Holmes
- Department of Biological Sciences and WWAMI Medical Education Program, University of Idaho, Moscow, ID 83844, USA;
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4
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Gangloff EJ, Schwartz TS, Klabacka R, Huebschman N, Liu AY, Bronikowski AM. Mitochondria as central characters in a complex narrative: Linking genomics, energetics, pace-of-life, and aging in natural populations of garter snakes. Exp Gerontol 2020; 137:110967. [DOI: 10.1016/j.exger.2020.110967] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 04/11/2020] [Accepted: 05/01/2020] [Indexed: 12/18/2022]
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5
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Bernard C, Compagnoni A, Salguero‐Gómez R. Testing Finch's hypothesis: The role of organismal modularity on the escape from actuarial senescence. Funct Ecol 2020. [DOI: 10.1111/1365-2435.13486] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Aldo Compagnoni
- Martin Luther University Halle‐Wittenberg German Centre for Integrative Biodiversity Research Leipzig Germany
| | - Roberto Salguero‐Gómez
- Department of Zoology University of Oxford Oxford UK
- Centre for Biodiversity and Conservation Science University of Queensland St. Lucia QLD Australia
- Evolutionary Demography laboratory Max Plank Institute for Demographic Research Rostock Germany
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6
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Affiliation(s)
- Jean‐Michel Gaillard
- Laboratoire de Biométrie et Biologie Evolutive UMR5558 CNRS Université Lyon 1 University of Lyon Villeurbanne France
| | - Jean‐François Lemaître
- Laboratoire de Biométrie et Biologie Evolutive UMR5558 CNRS Université Lyon 1 University of Lyon Villeurbanne France
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7
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Hoekstra LA, Schwartz TS, Sparkman AM, Miller DAW, Bronikowski AM. The untapped potential of reptile biodiversity for understanding how and why animals age. Funct Ecol 2020; 34:38-54. [PMID: 32921868 PMCID: PMC7480806 DOI: 10.1111/1365-2435.13450] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 09/03/2019] [Indexed: 12/12/2022]
Abstract
1. The field of comparative aging biology has greatly expanded in the past 20 years. Longitudinal studies of populations of reptiles with a range of maximum lifespans have accumulated and been analyzed for evidence of mortality senescence and reproductive decline. While not as well represented in studies of amniote senescence, reptiles have been the subjects of many recent demographic and mechanistic studies of the biology of aging. 2. We review recent literature on reptile demographic senescence, mechanisms of senescence, and identify unanswered questions. Given the ecophysiological and demographic diversity of reptiles, what is the expected range of reptile senescence rates? Are known mechanisms of aging in reptiles consistent with canonical hallmarks of aging in model systems? What are the knowledge gaps in our understanding of reptile aging? 3. We find ample evidence of increasing mortality with advancing age in many reptiles. Testudines stand out as slower aging than other orders, but data on crocodilians and tuatara are sparse. Sex-specific analyses are generally not available. Studies of female reproduction suggest that reptiles are less likely to have reproductive decline with advancing age than mammals. 4. Reptiles share many physiological and molecular pathways of aging with mammals, birds, and laboratory model organisms. Adaptations related to stress physiology coupled with reptilian ectothermy suggest novel comparisons and contrasts that can be made with canonical aging phenotypes in mammals. These include stem cell and regeneration biology, homeostatic mechanisms, IIS/TOR signaling, and DNA repair. 5. To overcome challenges to the study of reptile aging, we recommend extending and expanding long-term monitoring of reptile populations, developing reptile cell lines to aid cellular biology, conducting more comparative studies of reptile morphology and physiology sampled along relevant life-history axes, and sequencing more reptile genomes for comparative genomics. Given the diversity of reptile life histories and adaptations, achieving these directives will likely greatly benefit all aging biology.
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Affiliation(s)
- Luke A Hoekstra
- Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, Iowa, 50010, USA
| | - Tonia S Schwartz
- Department of Biological Sciences, Auburn University, Auburn, Alabama 36849, USA
| | - Amanda M Sparkman
- Department of Biology, Westmont College, Santa Barbara, California, 93108, USA
| | - David A W Miller
- Department of Ecosystem Science and Management, Pennsylvania State University, University Park, PA 16802, USA
| | - Anne M Bronikowski
- Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, Iowa, 50010, USA
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8
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Running out of developmental program and selfish anti-aging: a new hypothesis explaining the aging process in primates. GeroScience 2019; 41:243-253. [PMID: 30915631 DOI: 10.1007/s11357-019-00060-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 03/08/2019] [Indexed: 01/05/2023] Open
Abstract
Of the three complementary theories of aging, two (mutation accumulation and antagonistic pleiotropy) were formulated over fifty years ago before the introduction of molecular biology, and the third (disposable soma) is over thirty years old. Despite rigorous research in the past fifty years, none have gained substantial experimental support. Here, I review these theories and introduce a new hypothesis called the selfish anti-aging (SAA). Aging happens because natural selection is indifferent to the organism's life beyond reproduction; however, many mammalian species acquired anti-aging genes, which are providing instructions following completion of developmental, ontogeny, program. Such instructor-genes might be responsible for the elongation of lifespans of primates as a byproduct of parental care program. According to the SAA hypothesis, the animal models used in aging research could be divided into three groups, based on the degree of perceived presence and action of instructor-genes in each group. This new hypothesis is grounded in evolutionary theory and describes the unique primate aging process.
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9
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de Medina P. Deciphering the metabolic secret of longevity through the analysis of metabolic response to stress on long-lived species. Med Hypotheses 2018; 122:62-67. [PMID: 30593426 DOI: 10.1016/j.mehy.2018.10.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 09/30/2018] [Accepted: 10/20/2018] [Indexed: 02/06/2023]
Abstract
Despite intensive research, no satisfactory therapeutic options have been found for aging and age-related diseases. The British scientist Leslie Orgel stated that evolution is cleverer than we are. This assumption seems correct considering that some species are naturally able to resist the age-related diseases that remain unsolved by our modern medicine. Indeed, bowhead whales can live for more than two hundred years and are suspected to possess efficient antitumor mechanisms. Naked mole-rats are exceptionally long-lived compared to similar-sized mammals and are protected from senescence and age-related diseases. Consequently, the characterization of protective molecular mechanisms in long-lived species (i.e. bowhead whale, naked mole-rat, microbat) could be of great interest for therapeutic applications in human. Cellular stress response is considered to be an anti-aging process dedicated to the prevention of damage accumulation and the maintenance of homeostasis. Interestingly, cellular stress response in plants and animals involves the production of health-promoting metabolites such as resveratrol, nicotinamide adenine dinucleotide and spermidine. Do anti-aging metabolites formed during stress exposure differ between human and extreme longevity species in terms of their nature, their quantity or their production? These questions remain unsolved and deserve to be considered. Indeed, the mimicking of anti-aging strategies selected throughout evolution in long-lived species could be of high therapeutic value for humans. This paper suggests that metabolomic studies on extreme longevity species cells exposed to mild stressors may lead to the characterization of health-promoting metabolites. If confirmed, this would provide new avenues of research for the development of innovative anti-aging strategies for humans.
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10
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Ryder OA, Onuma M. Viable Cell Culture Banking for Biodiversity Characterization and Conservation. Annu Rev Anim Biosci 2018; 6:83-98. [DOI: 10.1146/annurev-animal-030117-014556] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Because living cells can be saved for indefinite periods, unprecedented opportunities for characterizing, cataloging, and conserving biological diversity have emerged as advanced cellular and genetic technologies portend new options for preventing species extinction. Crucial to realizing the potential impacts of stem cells and assisted reproductive technologies on biodiversity conservation is the cryobanking of viable cell cultures from diverse species, especially those identified as vulnerable to extinction in the near future. The advent of in vitro cell culture and cryobanking is reviewed here in the context of biodiversity collections of viable cell cultures that represent the progress and limitations of current efforts. The prospects for incorporating collections of frozen viable cell cultures into efforts to characterize the genetic changes that have produced the diversity of species on Earth and contribute to new initiatives in conservation argue strongly for a global network of facilities for establishing and cryobanking collections of viable cells.
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Affiliation(s)
- Oliver A. Ryder
- San Diego Institute for Conservation Research, San Diego Zoo Global, Escondido, California 92027-7000, USA
| | - Manabu Onuma
- Ecological Risk Assessment and Control Section, Center for Environmental Biology and Ecosystem, National Institute for Environmental Studies, 16-2, Onogawa, Tsukuba, Ibaraki, 305-8506, Japan
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11
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Maunder RJ, Baron MG, Owen SF, Jha AN. Investigations to extend viability of a rainbow trout primary gill cell culture. ECOTOXICOLOGY (LONDON, ENGLAND) 2017; 26:1314-1326. [PMID: 29127661 DOI: 10.1007/s10646-017-1856-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 09/12/2017] [Indexed: 06/07/2023]
Abstract
The primary culture of fish gill cells can provide functional, cell diverse, model in vitro platforms able to tolerate an aqueous exposure analogous to in vivo tissues. The utility of such models could be extended to a variety of longer term exposure scenarios if a method could be established to extend culture viability when exposed to water for longer periods. Here we report findings of a series of experiments to establish increased longevity, as monitored by culture transepithelial electrical resistance (TEER) and concurrent histological developments. Experimental cultures improved TEER during apical freshwater exposure for a mean of twelve days, compared to previous viabilities of up to 3 days. Cultures with larger surface areas and the use of trout serum rather than foetal bovine serum (FBS) contributed to the improvement, while perfusion of the intact gill prior to cell harvest resulted in a significantly faster preparation. Detailed scanning electron microscopy analysis of cultures revealed diverse surface structures that changed with culture age. Cultures grown on membranes with an increased porosity, collagen coating or 3D structure were of no benefit compared to standard membranes. Increased culture longevity, achieved in this study and reported for the first time, is a significant breakthrough and opens up a variety of future experimentation that has previously not been possible. The extended viability facilitates exploration of in vitro chronic or pulse-exposure test paradigms, longer term physiological and environmental monitoring studies and the potential for interactive co-culture with other organoid micro-tissues.
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Affiliation(s)
- Richard J Maunder
- School of Biological and Marine Sciences, University of Plymouth, Devon, PL4 8AA, UK
| | - Matthew G Baron
- School of Biological and Marine Sciences, University of Plymouth, Devon, PL4 8AA, UK
| | - Stewart F Owen
- AstraZeneca, Alderley Park, Macclesfield, Cheshire, SK10 4TF, UK
| | - Awadhesh N Jha
- School of Biological and Marine Sciences, University of Plymouth, Devon, PL4 8AA, UK.
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12
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Dhillon RS, Denu JM. Using comparative biology to understand how aging affects mitochondrial metabolism. Mol Cell Endocrinol 2017; 455:54-61. [PMID: 28025033 DOI: 10.1016/j.mce.2016.12.020] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 08/24/2016] [Accepted: 12/16/2016] [Indexed: 02/06/2023]
Abstract
Lifespan varies considerably among even closely related species, as exemplified by rodents and primates. Despite these disparities in lifespan, most studies have focused on intra-specific aging pathologies, primarily within a select few systems. While mice have provided much insight into aging biology, it is unclear if such a short-lived species lack defences against senescence that may have evolved in related longevous species. Many age-related diseases have been linked to mitochondrial dysfunction that are measured by decreased energy generation, structural damage to cellular components, and even cell death. Post translational modifications (PTMs) orchestrate many of the pathways associated with cellular metabolism, and are thought to be a key regulator in biological senescence. We propose hyperacylation as one such modification that may be implicated in numerous mitochondrial impairments affecting energy metabolism.
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Affiliation(s)
- Rashpal S Dhillon
- Department of Biomolecular Chemistry, University of Wisconsin- Madison, Madison, WI 53715, USA.
| | - John M Denu
- Department of Biomolecular Chemistry, University of Wisconsin- Madison, Madison, WI 53715, USA
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13
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Miller BF, Seals DR, Hamilton KL. A viewpoint on considering physiological principles to study stress resistance and resilience with aging. Ageing Res Rev 2017; 38:1-5. [PMID: 28676286 DOI: 10.1016/j.arr.2017.06.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 06/22/2017] [Accepted: 06/23/2017] [Indexed: 12/30/2022]
Abstract
Adaptation to stress is identified as one of the seven pillars of aging research. Our viewpoint discusses the importance of the distinction between stress resistance and resilience, highlights how integration of physiological principles is critical for further understanding in vivo stress resistance and resilience, and advocates for the use of early warning signs to prevent a tipping point in stress resistance and resilience.
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Affiliation(s)
- Benjamin F Miller
- Department of Health and Exercise Science, 201 Moby B Complex, Colorado State University, Fort Collins, CO, 80523-1582, USA.
| | - Douglas R Seals
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO, 80309,USA.
| | - Karyn L Hamilton
- Department of Health and Exercise Science, 201 Moby B Complex, Colorado State University, Fort Collins, CO, 80523-1582, USA.
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14
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Hamilton KL, Miller BF. What is the evidence for stress resistance and slowed aging? Exp Gerontol 2016; 82:67-72. [DOI: 10.1016/j.exger.2016.06.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Revised: 05/03/2016] [Accepted: 06/03/2016] [Indexed: 12/20/2022]
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15
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Triana-Martínez F, Pedraza-Vázquez G, Maciel-Barón LA, Königsberg M. Reflections on the role of senescence during development and aging. Arch Biochem Biophys 2016; 598:40-9. [PMID: 27059850 DOI: 10.1016/j.abb.2016.04.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 04/02/2016] [Accepted: 04/04/2016] [Indexed: 01/07/2023]
Abstract
New and stimulating results have challenged the concept that cellular senescence might not be synonymous with aging. It is indisputable that during aging, senescent cell accumulation has an impact on organismal health. Nevertheless, senescent cells are now known to display physiological roles during embryonic development, during wound healing repair and as a cellular response to stress. The fact that senescence has been found in cells that did not attain their maximal round of replications, nor have metabolic alterations or DNA damage, also challenges the paradigm that senescence is cellular aging, and it is in favor of the idea that cellular senescence is a phenomenon that has a function by itself. Therefore, in order to understand this phenomenon it is important to analyze the relationship between senescence and other cellular responses that have many features in common, such as apoptosis, cancer and autophagy, particularly highlighting their role during development and adulthood.
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Affiliation(s)
- F Triana-Martínez
- Dept. Ciencias de la Salud, DCBS, Universidad Autónoma Metropolitana Iztapalapa, México D.F. 09340, Mexico
| | - G Pedraza-Vázquez
- Dept. Ciencias de la Salud, DCBS, Universidad Autónoma Metropolitana Iztapalapa, México D.F. 09340, Mexico
| | - L A Maciel-Barón
- Dept. Ciencias de la Salud, DCBS, Universidad Autónoma Metropolitana Iztapalapa, México D.F. 09340, Mexico
| | - M Königsberg
- Dept. Ciencias de la Salud, DCBS, Universidad Autónoma Metropolitana Iztapalapa, México D.F. 09340, Mexico.
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Archer CR, Hempenstall S, Royle NJ, Selman C, Willis S, Rapkin J, Blount JD, Hunt J. Testing the Effects of DL-Alpha-Tocopherol Supplementation on Oxidative Damage, Total Antioxidant Protection and the Sex-Specific Responses of Reproductive Effort and Lifespan to Dietary Manipulation in Australian Field Crickets (Teleogryllus commodus). Antioxidants (Basel) 2015; 4:768-92. [PMID: 26783958 PMCID: PMC4712936 DOI: 10.3390/antiox4040768] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 11/16/2015] [Accepted: 11/18/2015] [Indexed: 12/15/2022] Open
Abstract
The oxidative stress theory predicts that the accumulation of oxidative damage causes aging. More generally, oxidative damage could be a cost of reproduction that reduces survival. Both of these hypotheses have mixed empirical support. To better understand the life-history consequences of oxidative damage, we fed male and female Australian field crickets (Teleogryllus commodus) four diets differing in their protein and carbohydrate content, which have sex-specific effects on reproductive effort and lifespan. We supplemented half of these crickets with the vitamin E isoform DL-alpha-tocopherol and measured the effects of nutrient intake on lifespan, reproduction, oxidative damage and antioxidant protection. We found a clear trade-off between reproductive effort and lifespan in females but not in males. In direct contrast to the oxidative stress theory, crickets fed diets that improved their lifespan had high levels of oxidative damage to proteins. Supplementation with DL-alpha-tocopherol did not significantly improve lifespan or reproductive effort. However, males fed diets that increased their reproductive investment experienced high oxidative damage to proteins. While this suggests that male reproductive effort could elevate oxidative damage, this was not associated with reduced male survival. Overall, these results provide little evidence that oxidative damage plays a central role in mediating life-history trade-offs in T. commodus.
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Affiliation(s)
- C Ruth Archer
- Max Planck Research Group, Laboratory of Survival and Longevity, Max Planck Institute for Demographic Research Konrad-Zuse-Str. 1, 18057 Rostock, Germany.
- MaxNetAging School, Max Planck Institute for Demographic Research, Konrad-Zuse-Straße 1, 18057 Rostock, Germany.
- Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Tremough Campus, Cornwall TR10 9FE, UK.
| | - Sarah Hempenstall
- Leiden University Medical Center, Postzone S4-P, P.O. Box 9600, 2300 RC Leiden, The Netherlands.
| | - Nick J Royle
- Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Tremough Campus, Cornwall TR10 9FE, UK.
| | - Colin Selman
- Institute of Biodiversity, Animal Health and Comparative Medicine, College of Medical, Veterinary & Life Sciences, Graham Kerr Building, University of Glasgow, Glasgow G12 8QQ, UK.
| | - Sheridan Willis
- Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Tremough Campus, Cornwall TR10 9FE, UK.
| | - James Rapkin
- Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Tremough Campus, Cornwall TR10 9FE, UK.
| | - Jon D Blount
- Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Tremough Campus, Cornwall TR10 9FE, UK.
| | - John Hunt
- Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Tremough Campus, Cornwall TR10 9FE, UK.
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17
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Fletcher QE, Selman C. Aging in the wild: Insights from free-living and non-model organisms. Exp Gerontol 2015; 71:1-3. [PMID: 26403678 DOI: 10.1016/j.exger.2015.09.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Quinn E Fletcher
- Department of Biology, University of Winnipeg, Winnipeg, MB R3B 2E9, Canada.
| | - Colin Selman
- Glasgow Ageing Research Network (GARNER), Institute of Biodiversity, Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8QQ, UK.
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