1
|
Matteini F, Montserrat-Vazquez S, Florian MC. Rejuvenating aged stem cells: therapeutic strategies to extend health and lifespan. FEBS Lett 2024. [PMID: 38604982 DOI: 10.1002/1873-3468.14865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 02/03/2024] [Accepted: 03/07/2024] [Indexed: 04/13/2024]
Abstract
Aging is associated with a global decline in stem cell function. To date, several strategies have been proposed to rejuvenate aged stem cells: most of these result in functional improvement of the tissue where the stem cells reside, but the impact on the lifespan of the whole organism has been less clearly established. Here, we review some of the most recent work dealing with interventions that improve the regenerative capacity of aged somatic stem cells in mammals and that might have important translational possibilities. Overall, we underscore that somatic stem cell rejuvenation represents a strategy to improve tissue homeostasis upon aging and present some recent approaches with the potential to affect health span and lifespan of the whole organism.
Collapse
Affiliation(s)
- Francesca Matteini
- Stem Cell Aging Group, Regenerative Medicine Program, The Bellvitge Institute for Biomedical Research (IDIBELL), Barcelona, Spain
- Program for Advancing the Clinical Translation of Regenerative Medicine of Catalonia (P-CMR[C]), Barcelona, Spain
| | - Sara Montserrat-Vazquez
- Stem Cell Aging Group, Regenerative Medicine Program, The Bellvitge Institute for Biomedical Research (IDIBELL), Barcelona, Spain
- Program for Advancing the Clinical Translation of Regenerative Medicine of Catalonia (P-CMR[C]), Barcelona, Spain
| | - M Carolina Florian
- Stem Cell Aging Group, Regenerative Medicine Program, The Bellvitge Institute for Biomedical Research (IDIBELL), Barcelona, Spain
- Program for Advancing the Clinical Translation of Regenerative Medicine of Catalonia (P-CMR[C]), Barcelona, Spain
- Center for Networked Biomedical Research on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
- The Catalan Institution for Research and Advanced Studies (ICREA), Barcelona, Spain
| |
Collapse
|
2
|
Wang Z, Sim HJ, Liu W, Kim JC, Lee JC, Kook SH, Kim SH. Differential Effects of Endurance Exercise on Musculoskeletal and Hematopoietic Modulation in Old Mice. Aging Dis 2024; 15:755-766. [PMID: 37548936 PMCID: PMC10917547 DOI: 10.14336/ad.2023.0713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 07/13/2023] [Indexed: 08/08/2023] Open
Abstract
One of the most important strategies for successful aging is exercise. However, the effect of exercise can differ among individuals, even with exercise of the same type and intensity. Therefore, this study aims to confirm whether endurance training (ETR) has the same health-promoting effects on the musculoskeletal and hematopoietic systems regardless of age. Ten weeks of ETR improved endurance exercise capacity, with increased skeletal muscle mitochondrial enzymes in both young and old mice. In addition, age-related deterioration of muscle fiber size and bone microstructure was improved. The expression levels of myostatin, muscle RING-finger protein-1, and muscle atrophy F-box in skeletal muscle and peroxisome proliferator-activated receptor-γ in the femur increased with age but decreased after ETR. ETR differentially modulated hematopoietic stem cells (HSCs) depending on age; ETR induced HSC quiescence in young mice but caused HSC senescence in old mice. ETR has differential effects on modulation of the musculoskeletal and hematopoietic systems in old mice. In other words, endurance exercise is a double-edged sword for successful aging, and great effort is required to establish exercise strategies for healthy aging.
Collapse
Affiliation(s)
- Zilin Wang
- Department of Sports Science, College of Natural Science, Jeonbuk National University, Jeonju 54896, Korea.
| | - Hyun-Jaung Sim
- Department of Bioactive Material Sciences, Research Center of Bioactive Materials, Jeonbuk National University, Jeonju 54896, Korea.
- Cluster for Craniofacial Development and Regeneration Research, Institute of Oral Biosciences and School of Dentistry, Jeonbuk National University, Jeonju 54896, Korea.
| | - Wenduo Liu
- Department of Sports Science, College of Natural Science, Jeonbuk National University, Jeonju 54896, Korea.
| | - Jae Cheol Kim
- Department of Sports Science, College of Natural Science, Jeonbuk National University, Jeonju 54896, Korea.
| | - Jeong-Chae Lee
- Department of Bioactive Material Sciences, Research Center of Bioactive Materials, Jeonbuk National University, Jeonju 54896, Korea.
- Cluster for Craniofacial Development and Regeneration Research, Institute of Oral Biosciences and School of Dentistry, Jeonbuk National University, Jeonju 54896, Korea.
| | - Sung-Ho Kook
- Department of Bioactive Material Sciences, Research Center of Bioactive Materials, Jeonbuk National University, Jeonju 54896, Korea.
- Cluster for Craniofacial Development and Regeneration Research, Institute of Oral Biosciences and School of Dentistry, Jeonbuk National University, Jeonju 54896, Korea.
| | - Sang Hyun Kim
- Department of Sports Science, College of Natural Science, Jeonbuk National University, Jeonju 54896, Korea.
| |
Collapse
|
3
|
Pajski ML, Byrd C, Nandigama N, Seguin E, Seguin A, Fennell A, Graber TG. Endurance exercise preserves physical function in adult and older male C57BL/6 mice: high intensity interval training (HIIT) versus voluntary wheel running (VWR). FRONTIERS IN AGING 2024; 5:1356954. [PMID: 38523671 PMCID: PMC10958787 DOI: 10.3389/fragi.2024.1356954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Accepted: 02/23/2024] [Indexed: 03/26/2024]
Abstract
Exercise has been shown to improve physical function, mitigate aspects of chronic disease and to potentially alter the trajectory of age-related onset of frailty and sarcopenia. Reliable and valid preclinical models are necessary to elucidate the underlying mechanisms at the intersection of age, exercise, and functional decline. The purpose of this study was to compare, head to head, the effects of two common pre-clinical models of endurance exercise: high intensity interval training (HIIT) and voluntary wheel running (VWR). The hypothesis was that a prescribed and regimented exercise program, HIIT, would prove to be a superior training method to unregulated voluntary exercise, VWR. To investigate this hypothesis, we evaluated adult (n = 24, designated 10 m, aged 6 months at the beginning of the study, 10 months at its completion) and older adult (n = 18, designated 26 m, aging from 22 months to 26 months over the course of the study) C57BL/6 male mice. These mice were randomly assigned (with selection criteria) to a 13-week program of voluntary wheel running (VWR), high intensity interval training (HIIT), or sedentary control (SED). The functional aptitude of each mouse was determined pre- and post-training using our composite CFAB (comprehensive functional assessment battery) scoring system consisting of voluntary wheel running (volitional exercise and activity rate), treadmill (endurance), rotarod (overall motor function), grip meter (forelimb strength), and inverted cling (whole body strength/endurance). To measure sarcopenia, we tracked body mass, body composition (with EchoMRI), plantar flexor torque (in 10 m), and measured muscle wet mass post-training. Overall, adult CFAB scores decreased while body mass and percent body fat increased as they matured; however, exercise significantly mitigated the changes (p < 0.05) compared to SED. Older adults demonstrated preservation of function (CFAB) and reduced body fat (p < 0.05) compared to SED. To conclude, both types of exercise maintained physical function equally in older mice.
Collapse
Affiliation(s)
- Megan L. Pajski
- Department of Physical Therapy, East Carolina University, Greenville, NC, United States
| | - Chris Byrd
- Department of Physical Therapy, East Carolina University, Greenville, NC, United States
| | - Nainika Nandigama
- Department of Public Health, East Carolina University, Greenville, NC, United States
| | - Emily Seguin
- Department of Kinesiology, East Carolina University, Greenville, NC, United States
| | - Anna Seguin
- Department of Kinesiology, East Carolina University, Greenville, NC, United States
| | - Alyssa Fennell
- Department of Kinesiology, East Carolina University, Greenville, NC, United States
| | - Ted G. Graber
- Department of Physical Therapy, East Carolina University, Greenville, NC, United States
- Department of Kinesiology, East Carolina University, Greenville, NC, United States
- Department of Physiology, East Carolina University, Greenville, NC, United States
- East Carolina Obesity and Diabetes Institute, East Carolina University, Greenville, NC, United States
| |
Collapse
|
4
|
Viguier C, Bullich S, Botella M, Fasseu L, Alfonso A, Rekik K, Gauzin S, Guiard BP, Davezac N. Impact of physical activity on brain oxidative metabolism and intrinsic capacities in young swiss mice fed a high fat diet. Neuropharmacology 2023; 241:109730. [PMID: 37758019 DOI: 10.1016/j.neuropharm.2023.109730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 09/22/2023] [Accepted: 09/23/2023] [Indexed: 10/03/2023]
Abstract
Type 2 diabetes and obesity characterized by hallmarks of insulin resistance along with an imbalance in brain oxidative metabolism would impair intrinsic capacities (ICs), a new concept for assessing mental and physical functioning. Here, we explored the impact of physical activity on antioxidant responses and oxidative metabolism in discrete brain areas of HFD or standard diet (STD) fed mice but also its consequences on specific domains of ICs. 6-week-old Swiss male mice were exposed to a STD or a HFD for 16 weeks and half of the mice in each group had access to an activity wheel and the other half did not. As expected HFD mice displayed peripheral insulin resistance but also a persistent inhibition of aconitase activity in cortices revealing an increase in mitochondrial reactive oxygen species (ROS) production. Animals with access to the running wheel displayed an improvement of insulin sensitivity regardless of the diet factor whereas ROS production remained impaired. Moreover, although the access of the running wheel did not influence mitochondrial biomass, in the oxidative metabolism area, it produced a slight decrease in brain SOD1 and catalase expression notably in HFD fed mice. At the behavioural level, physical exercise produced anxiolytic/antidepressant-like responses and improved motor coordination in both STD and HFD fed mice. However, this non-pharmacological intervention failed to enhance cognitive performance. These findings paint a contrasting landscape about physical exercise as a non-pharmacological intervention for positively orienting the aging trajectory.
Collapse
Affiliation(s)
- Clémence Viguier
- Remember Team, Research Center on Animal Cognition (CRCA), Center of Integrative Biology (CBI), CNRS - University of Toulouse, CNRS, UPS, 31 067, Toulouse, France
| | - Sébastien Bullich
- Remember Team, Research Center on Animal Cognition (CRCA), Center of Integrative Biology (CBI), CNRS - University of Toulouse, CNRS, UPS, 31 067, Toulouse, France
| | - Marlene Botella
- Minding Team, Research Center on Animal Cognition (CRCA), Center of Integrative Biology (CBI), CNRS - University of Toulouse, CNRS, UPS, 31 067, Toulouse, France; INSPIRE Consortium, France
| | - Laure Fasseu
- Minding Team, Research Center on Animal Cognition (CRCA), Center of Integrative Biology (CBI), CNRS - University of Toulouse, CNRS, UPS, 31 067, Toulouse, France; INSPIRE Consortium, France
| | - Amélie Alfonso
- Remember Team, Research Center on Animal Cognition (CRCA), Center of Integrative Biology (CBI), CNRS - University of Toulouse, CNRS, UPS, 31 067, Toulouse, France; INSPIRE Consortium, France
| | - Khaoula Rekik
- Remember Team, Research Center on Animal Cognition (CRCA), Center of Integrative Biology (CBI), CNRS - University of Toulouse, CNRS, UPS, 31 067, Toulouse, France
| | - Sébastien Gauzin
- Remember Team, Research Center on Animal Cognition (CRCA), Center of Integrative Biology (CBI), CNRS - University of Toulouse, CNRS, UPS, 31 067, Toulouse, France; INSPIRE Consortium, France
| | - Bruno P Guiard
- Remember Team, Research Center on Animal Cognition (CRCA), Center of Integrative Biology (CBI), CNRS - University of Toulouse, CNRS, UPS, 31 067, Toulouse, France; INSPIRE Consortium, France.
| | - Noélie Davezac
- Minding Team, Research Center on Animal Cognition (CRCA), Center of Integrative Biology (CBI), CNRS - University of Toulouse, CNRS, UPS, 31 067, Toulouse, France; INSPIRE Consortium, France.
| |
Collapse
|
5
|
Hamilton KL, Selman C. Can exercise prevent the age-related decline in adaptive homeostasis? Evidence across organisms and tissues. J Physiol 2023. [PMID: 37130065 DOI: 10.1113/jp284583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023] Open
Affiliation(s)
- Karyn L Hamilton
- Department of Health and Exercise Science and The Columbine Health Systems Center for Healthy Aging, Colorado State University, Fort Collins, CO, USA
| | - Colin Selman
- School of Biodiversity, One Health and Veterinary Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| |
Collapse
|
6
|
Dhillon RS, Qin Y(A, van Ginkel PR, Fu VX, Vann JM, Lawton AJ, Green CL, Manchado‐Gobatto FB, Gobatto CA, Lamming DW, Prolla TA, Denu JM. SIRT3 deficiency decreases oxidative metabolism capacity but increases lifespan in male mice under caloric restriction. Aging Cell 2022; 21:e13721. [PMID: 36199173 PMCID: PMC9741511 DOI: 10.1111/acel.13721] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 09/11/2022] [Accepted: 09/12/2022] [Indexed: 12/14/2022] Open
Abstract
Mitochondrial NAD+ -dependent protein deacetylase Sirtuin3 (SIRT3) has been proposed to mediate calorie restriction (CR)-dependent metabolic regulation and lifespan extension. Here, we investigated the role of SIRT3 in CR-mediated longevity, mitochondrial function, and aerobic fitness. We report that SIRT3 is required for whole-body aerobic capacity but is dispensable for CR-dependent lifespan extension. Under CR, loss of SIRT3 (Sirt3-/- ) yielded a longer overall and maximum lifespan as compared to Sirt3+/+ mice. This unexpected lifespan extension was associated with altered mitochondrial protein acetylation in oxidative metabolic pathways, reduced mitochondrial respiration, and reduced aerobic exercise capacity. Also, Sirt3-/- CR mice exhibit lower spontaneous activity and a trend favoring fatty acid oxidation during the postprandial period. This study shows the uncoupling of lifespan and healthspan parameters (aerobic fitness and spontaneous activity) and provides new insights into SIRT3 function in CR adaptation, fuel utilization, and aging.
Collapse
Affiliation(s)
- Rashpal S. Dhillon
- Department of Biomolecular ChemistryUniversity of Wisconsin‐MadisonMadisonWisconsinUSA,Wisconsin Institute for DiscoveryUniversity of Wisconsin‐MadisonMadisonWisconsinUSA
| | - Yiming (Amy) Qin
- Department of Biomolecular ChemistryUniversity of Wisconsin‐MadisonMadisonWisconsinUSA,Wisconsin Institute for DiscoveryUniversity of Wisconsin‐MadisonMadisonWisconsinUSA,Interdepartmental Graduate Program in Nutritional SciencesUniversity of Wisconsin‐MadisonMadisonWisconsinUSA
| | - Paul R. van Ginkel
- Department of Genetics and Medical GeneticsUniversity of Wisconsin‐MadisonMadisonWisconsinUSA
| | - Vivian X. Fu
- Department of Genetics and Medical GeneticsUniversity of Wisconsin‐MadisonMadisonWisconsinUSA
| | - James M. Vann
- Department of Genetics and Medical GeneticsUniversity of Wisconsin‐MadisonMadisonWisconsinUSA
| | - Alexis J. Lawton
- Department of Biomolecular ChemistryUniversity of Wisconsin‐MadisonMadisonWisconsinUSA,Wisconsin Institute for DiscoveryUniversity of Wisconsin‐MadisonMadisonWisconsinUSA
| | - Cara L. Green
- Department of Medicine, SMPHUniversity of Wisconsin‐MadisonMadisonWisconsinUSA,William S. Middleton Memorial Veterans HospitalMadisonWisconsinUSA
| | | | - Claudio A. Gobatto
- Laboratory of Applied Sport Physiology, School of Applied SciencesUniversity of CampinasLimeiraBrazil
| | - Dudley W. Lamming
- Interdepartmental Graduate Program in Nutritional SciencesUniversity of Wisconsin‐MadisonMadisonWisconsinUSA,Department of Medicine, SMPHUniversity of Wisconsin‐MadisonMadisonWisconsinUSA,William S. Middleton Memorial Veterans HospitalMadisonWisconsinUSA
| | - Tomas A. Prolla
- Department of Genetics and Medical GeneticsUniversity of Wisconsin‐MadisonMadisonWisconsinUSA
| | - John M. Denu
- Department of Biomolecular ChemistryUniversity of Wisconsin‐MadisonMadisonWisconsinUSA,Wisconsin Institute for DiscoveryUniversity of Wisconsin‐MadisonMadisonWisconsinUSA,Interdepartmental Graduate Program in Nutritional SciencesUniversity of Wisconsin‐MadisonMadisonWisconsinUSA
| |
Collapse
|
7
|
Effects of lifespan-extending interventions on cognitive healthspan. Expert Rev Mol Med 2022; 25:e2. [PMID: 36377361 DOI: 10.1017/erm.2022.36] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Ageing is known to be the primary risk factor for most neurodegenerative diseases, including Alzheimer's disease, Parkinson's disease and Huntington's disease. They are currently incurable and worsen over time, which has broad implications in the context of lifespan and healthspan extension. Adding years to life and even to physical health is suboptimal or even insufficient, if cognitive ageing is not adequately improved. In this review, we will examine how interventions that have the potential to extend lifespan in animals affect the brain, and if they would be able to thwart or delay the development of cognitive dysfunction and/or neurodegeneration. These interventions range from lifestyle (caloric restriction, physical exercise and environmental enrichment) through pharmacological (nicotinamide adenine dinucleotide precursors, resveratrol, rapamycin, metformin, spermidine and senolytics) to epigenetic reprogramming. We argue that while many of these interventions have clear potential to improve cognitive health and resilience, large-scale and long-term randomised controlled trials are needed, along with studies utilising washout periods to determine the effects of supplementation cessation, particularly in aged individuals.
Collapse
|
8
|
Culig L, Chu X, Bohr VA. Neurogenesis in aging and age-related neurodegenerative diseases. Ageing Res Rev 2022; 78:101636. [PMID: 35490966 PMCID: PMC9168971 DOI: 10.1016/j.arr.2022.101636] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 04/14/2022] [Accepted: 04/25/2022] [Indexed: 12/11/2022]
Abstract
Adult neurogenesis, the process by which neurons are generated in certain areas of the adult brain, declines in an age-dependent manner and is one potential target for extending cognitive healthspan. Aging is a major risk factor for neurodegenerative diseases and, as lifespans are increasing, these health challenges are becoming more prevalent. An age-associated loss in neural stem cell number and/or activity could cause this decline in brain function, so interventions that reverse aging in stem cells might increase the human cognitive healthspan. In this review, we describe the involvement of adult neurogenesis in neurodegenerative diseases and address the molecular mechanistic aspects of neurogenesis that involve some of the key aggregation-prone proteins in the brain (i.e., tau, Aβ, α-synuclein, …). We summarize the research pertaining to interventions that increase neurogenesis and regulate known targets in aging research, such as mTOR and sirtuins. Lastly, we share our outlook on restoring the levels of neurogenesis to physiological levels in elderly individuals and those with neurodegeneration. We suggest that modulating neurogenesis represents a potential target for interventions that could help in the fight against neurodegeneration and cognitive decline.
Collapse
Affiliation(s)
- Luka Culig
- Section on DNA Repair, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, USA
| | - Xixia Chu
- Section on DNA Repair, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, USA
| | - Vilhelm A Bohr
- Section on DNA Repair, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, USA.
| |
Collapse
|
9
|
Acosta-Rodríguez V, Rijo-Ferreira F, Izumo M, Xu P, Wight-Carter M, Green CB, Takahashi JS. Circadian alignment of early onset caloric restriction promotes longevity in male C57BL/6J mice. Science 2022; 376:1192-1202. [PMID: 35511946 PMCID: PMC9262309 DOI: 10.1126/science.abk0297] [Citation(s) in RCA: 135] [Impact Index Per Article: 67.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Caloric restriction (CR) prolongs lifespan, yet the mechanisms by which it does so remain poorly understood. Under CR, mice self-impose chronic cycles of 2-hour-feeding and 22-hour-fasting, raising the question whether calories, fasting, or time of day are causal. We show that 30%-CR is sufficient to extend lifespan 10%; however, a daily fasting interval and circadian-alignment of feeding act together to extend lifespan 35% in male C57BL/6J mice. These effects are independent of body weight. Aging induces widespread increases in gene expression associated with inflammation and decreases in expression of genes encoding components of metabolic pathways in liver from ad lib fed mice. CR at night ameliorates these aging-related changes. Thus, circadian interventions promote longevity and provide a perspective to further explore mechanisms of aging. Timed caloric restriction at night enhances longevity.
Collapse
Affiliation(s)
- Victoria Acosta-Rodríguez
- Department of Neuroscience, Peter O'Donnell Jr. Brain Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Filipa Rijo-Ferreira
- Department of Neuroscience, Peter O'Donnell Jr. Brain Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.,Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Mariko Izumo
- Department of Neuroscience, Peter O'Donnell Jr. Brain Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Pin Xu
- Department of Neuroscience, Peter O'Donnell Jr. Brain Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Mary Wight-Carter
- Animal Resources Center, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Carla B Green
- Department of Neuroscience, Peter O'Donnell Jr. Brain Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Joseph S Takahashi
- Department of Neuroscience, Peter O'Donnell Jr. Brain Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.,Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| |
Collapse
|
10
|
Longevity interventions temporally scale healthspan in Caenorhabditis elegans. iScience 2022; 25:103983. [PMID: 35310333 PMCID: PMC8924689 DOI: 10.1016/j.isci.2022.103983] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 12/30/2021] [Accepted: 02/21/2022] [Indexed: 01/14/2023] Open
Abstract
Human centenarians and longevity mutants of model organisms show lower incidence rates of late-life morbidities than the average population. However, whether longevity is caused by a compression of the portion of life spent in a state of morbidity, i.e., "sickspan," is highly debated even in isogenic Caenorhabditis elegans. Here, we developed a microfluidic device that employs acoustophoretic force fields to quantify the maximum muscle strength and dynamic power in aging C. elegans. Together with different biomarkers for healthspan, we found a stochastic onset of morbidity, starting with a decline in dynamic muscle power and structural integrity, culminating in frailty. Surprisingly, we did not observe a compression of sickspan in longevity mutants but instead observed a temporal scaling of healthspan. Given the conservation of these longevity interventions, this raises the question of whether the healthspan of mammalian longevity interventions is also temporally scaled.
Collapse
|
11
|
Polidori MC, Mecocci P. Modeling the dynamics of energy imbalance: The free radical theory of aging and frailty revisited. Free Radic Biol Med 2022; 181:235-240. [PMID: 35151828 DOI: 10.1016/j.freeradbiomed.2022.02.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 01/15/2022] [Accepted: 02/08/2022] [Indexed: 12/12/2022]
Abstract
The role of oxidative stress in aging and the newly conceptualized vision of frailty is of great interest for the possibility to define a framework able to explain the several modifications observed in all biological molecules along with age. In this review, the impact of oxidative stress is considered in aging processes as well as in frailty, the geriatric concept of declined capacity to cope with any stressor, leading to a status of reduced ability to maintain the homeostatic balance. Although some pharmacological and behavioral approaches have been proposed, we are still lacking efficacious management able to prevent and avoid frailty. This represents a fundamental challenge for future research in this field.
Collapse
Affiliation(s)
- Maria Cristina Polidori
- Department II of Internal Medicine and Center for Molecular Medicine Cologne, University of Cologne, Faculty of Medicine and University Hospital Cologne, Kerpener Str. 62, 50937, Cologne, Germany.
| | - Patrizia Mecocci
- Institute of Gerontology and Geriatrics, Department of Medicine and Surgery, University of Perugia, Perugia Hospital, Building C Floor 4, Piazzale Menghini, 1 - 06132, Perugia, Italy.
| |
Collapse
|
12
|
Bisset ES, Heinze-Milne S, Grandy SA, Howlett SE. Aerobic Exercise Attenuates Frailty in Aging Male and Female C57Bl/6 Mice and Effects Systemic Cytokines Differentially by Sex. J Gerontol A Biol Sci Med Sci 2022; 77:41-46. [PMID: 34610102 PMCID: PMC8751786 DOI: 10.1093/gerona/glab297] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Indexed: 12/19/2022] Open
Abstract
Aerobic exercise is a promising intervention to attenuate frailty, but preclinical studies have used only male animals. We investigated the impact of voluntary aerobic exercise on frailty, biological age (FRailty Inferred Geriatric Health Timeline [FRIGHT] clock), predicted life expectancy (Analysis of FRAIlty and Death [AFRAID] clock), and mortality in both sexes and determined whether exercise was associated with changes in inflammation. Older (21-23 months) male (n = 12) and female (n = 22) C57Bl/6 mice matched for baseline frailty scores were randomized into exercise (running wheel) and sedentary (no wheel) groups. Frailty index scores were measured biweekly (13 weeks), and 23 serum cytokines were measured at midpoint and end point. Exercise levels varied between mice but not between the sexes. Exercise had no effect on mortality, but it attenuated the development of frailty in both sexes (female = 0.32 ± 0.04 vs 0.21 ± 0.01; p = .005; male = 0.30 ± 0.02 vs 0.22 ± 0.02; p = .042) and reduced frailty in older females after 10 weeks. FRIGHT scores were unaffected by exercise but increased with time in sedentary males indicating increased biological age. Exercise prevented the age-associated decline in AFRAID scores in older females such that exercised females had a longer life expectancy. We investigated whether aerobic exercise was associated with changes in systemic inflammation. Cytokine levels were not affected by exercise in males, but levels of pro-inflammatory cytokines were positively correlated with the frequency of exercise in females. Despite increases in systemic inflammation, exercise reduced frailty and increased life span in older females. Thus, voluntary aerobic exercise, even late in life, has beneficial effects on health in both sexes but may be especially helpful in older females.
Collapse
Affiliation(s)
- Elise S Bisset
- Department of Pharmacology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Stefan Heinze-Milne
- Department of Pharmacology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Scott A Grandy
- Department of Pharmacology, Dalhousie University, Halifax, Nova Scotia, Canada
- School of Health and Human Performance, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Susan E Howlett
- Department of Pharmacology, Dalhousie University, Halifax, Nova Scotia, Canada
- Department of Medicine (Geriatric Medicine), Dalhousie University, Halifax, Nova Scotia, Canada
| |
Collapse
|
13
|
Hoffman JM, Hernandez CM, Hernandez AR, Bizon JL, Burke SN, Carter CS, Buford TW. Bridging the Gap: A Geroscience Primer for Neuroscientists With Potential Collaborative Applications. J Gerontol A Biol Sci Med Sci 2022; 77:e10-e18. [PMID: 34653247 PMCID: PMC8751800 DOI: 10.1093/gerona/glab314] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Indexed: 11/13/2022] Open
Abstract
While neurodegenerative diseases can strike at any age, the majority of afflicted individuals are diagnosed at older ages. Due to the important impact of age in disease diagnosis, the field of neuroscience could greatly benefit from the many of the theories and ideas from the biology of aging-now commonly referred as geroscience. As discussed in our complementary perspective on the topic, there is often a "silo-ing" between geroscientists who work on understanding the mechanisms underlying aging and neuroscientists who are studying neurodegenerative diseases. While there have been some strong collaborations between the biology of aging and neuroscientists, there is still great potential for enhanced collaborative effort between the 2 fields. To this end, here, we review the state of the geroscience field, discuss how neuroscience could benefit from thinking from a geroscience perspective, and close with a brief discussion on some of the "missing links" between geroscience and neuroscience and how to remedy them. Notably, we have a corresponding, concurrent review from the neuroscience perspective. Our overall goal is to "bridge the gap" between geroscience and neuroscience such that more efficient, reproducible research with translational potential can be conducted.
Collapse
Affiliation(s)
- Jessica M Hoffman
- Department of Biology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Caesar M Hernandez
- Department of Cellular, Development, and Integrative Biology, The University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Abbi R Hernandez
- Department of Medicine, Division of Gerontology, Geriatrics and Palliative Care, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Jennifer L Bizon
- Department of Neuroscience and Center for Cognitive Aging and Memory, McKnight Brain Institute, University of Florida College of Medicine, Gainesville, Florida, USA
| | - Sara N Burke
- Department of Neuroscience and Center for Cognitive Aging and Memory, McKnight Brain Institute, University of Florida College of Medicine, Gainesville, Florida, USA
| | - Christy S Carter
- Department of Medicine, Division of Gerontology, Geriatrics and Palliative Care, University of Alabama at Birmingham, Birmingham, Alabama, USA.,Nathan Shock Center for Excellence in the Basic Biology of Aging, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Thomas W Buford
- Department of Medicine, Division of Gerontology, Geriatrics and Palliative Care, University of Alabama at Birmingham, Birmingham, Alabama, USA.,Geriatric Research Education and Clinical Center, Birmingham Veteran's Affairs Medical Center, Birmingham, Alabama, USA
| |
Collapse
|
14
|
The active grandparent hypothesis: Physical activity and the evolution of extended human healthspans and lifespans. Proc Natl Acad Sci U S A 2021; 118:2107621118. [PMID: 34810239 DOI: 10.1073/pnas.2107621118] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The proximate mechanisms by which physical activity (PA) slows senescence and decreases morbidity and mortality have been extensively documented. However, we lack an ultimate, evolutionary explanation for why lifelong PA, particularly during middle and older age, promotes health. As the growing worldwide epidemic of physical inactivity accelerates the prevalence of noncommunicable diseases among aging populations, integrating evolutionary and biomedical perspectives can foster new insights into how and why lifelong PA helps preserve health and extend lifespans. Building on previous life-history research, we assess the evidence that humans were selected not just to live several decades after they cease reproducing but also to be moderately physically active during those postreproductive years. We next review the longstanding hypothesis that PA promotes health by allocating energy away from potentially harmful overinvestments in fat storage and reproductive tissues and propose the novel hypothesis that PA also stimulates energy allocation toward repair and maintenance processes. We hypothesize that selection in humans for lifelong PA, including during postreproductive years to provision offspring, promoted selection for both energy allocation pathways which synergistically slow senescence and reduce vulnerability to many forms of chronic diseases. As a result, extended human healthspans and lifespans are both a cause and an effect of habitual PA, helping explain why lack of lifelong PA in humans can increase disease risk and reduce longevity.
Collapse
|
15
|
Wolf AM. Rodent diet aids and the fallacy of caloric restriction. Mech Ageing Dev 2021; 200:111584. [PMID: 34673082 DOI: 10.1016/j.mad.2021.111584] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 10/01/2021] [Accepted: 10/05/2021] [Indexed: 12/14/2022]
Abstract
Understanding the molecular mechanisms of normal aging is a prerequisite to significantly improving human health span. Caloric restriction (CR) can delay aging and has served as a yardstick to evaluate interventions extending life span. However, mice given unlimited access to food suffer severe obesity. Health gains from CR depend on control mice being sufficiently overweight and less obese mouse strains benefit far less from CR. Pharmacologic interventions that increase life span, including resveratrol, rapamycin, nicotinamide mononucleotide and metformin, also reduce body weight. In primates, CR does not delay aging unless the control group is eating enough to suffer from obesity-related disease. Human survival is optimal at a body mass index achievable without CR, and the above interventions are merely diet aids that shouldn't slow aging in healthy weight individuals. CR in humans of optimal weight can safely be declared useless, since there is overwhelming evidence that hunger, underweight and starvation reduce fitness, survival, and quality of life. Against an obese control, CR does, however, truly delay aging through a mechanism laid out in the following tumor suppression theory of aging.
Collapse
Affiliation(s)
- Alexander M Wolf
- Laboratory for Morphological and Biomolecular Imaging, Faculty of Medicine, Nippon Medical School, Japan.
| |
Collapse
|
16
|
Wiley CD, Campisi J. The metabolic roots of senescence: mechanisms and opportunities for intervention. Nat Metab 2021; 3:1290-1301. [PMID: 34663974 PMCID: PMC8889622 DOI: 10.1038/s42255-021-00483-8] [Citation(s) in RCA: 183] [Impact Index Per Article: 61.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 09/13/2021] [Indexed: 12/14/2022]
Abstract
Cellular senescence entails a permanent proliferative arrest, coupled to multiple phenotypic changes. Among these changes is the release of numerous biologically active molecules collectively known as the senescence-associated secretory phenotype, or SASP. A growing body of literature indicates that both senescence and the SASP are sensitive to cellular and organismal metabolic states, which in turn can drive phenotypes associated with metabolic dysfunction. Here, we review the current literature linking senescence and metabolism, with an eye toward findings at the cellular level, including both metabolic inducers of senescence and alterations in cellular metabolism associated with senescence. Additionally, we consider how interventions that target either metabolism or senescent cells might influence each other and mitigate some of the pro-aging effects of cellular senescence. We conclude that the most effective interventions will likely break a degenerative feedback cycle by which cellular senescence promotes metabolic diseases, which in turn promote senescence.
Collapse
Affiliation(s)
- Christopher D Wiley
- Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, CA, USA.
- Buck Institute for Research on Aging, Novato, CA, USA.
| | - Judith Campisi
- Buck Institute for Research on Aging, Novato, CA, USA
- Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| |
Collapse
|
17
|
Hoffman JM, Valencak TG. Sex differences and aging: Is there a role of brown adipose tissue? Mol Cell Endocrinol 2021; 531:111310. [PMID: 33989715 PMCID: PMC8195864 DOI: 10.1016/j.mce.2021.111310] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 03/31/2021] [Accepted: 04/28/2021] [Indexed: 12/12/2022]
Abstract
In every population across the world, women live significantly longer than men; however, the underlying physiological processes that drive these sex differences in age-specific mortality are largely unknown. Recently, the role of adipose tissue in aging and longevity has been a focus of biomedical research in both humans and rodent models. Specifically, brown adipose tissue, a thermoregulatory tissue originally thought to not exist past infancy in humans, has been shown to potentially play a role in health throughout the lifespan. Females have larger adult brown adipose depots that are not just larger in size but also more efficient in non-shivering thermogenesis. This improved functioning of the brown adipose tissue may potentially lead to improved female health, and we hypothesize that this advantage may be of even bigger significance in the older population. Here, we briefly review what is known about sex differences in aging and how sex differences in brown adipose tissue may be contributing to the female lifespan advantage. These questions have usually been addressed in large experimental studies in rodents as a translational model of human aging. Overall, we propose that a better understanding of the thermogenesis-metabolism nexus is necessary in biomedical research, and sex differences in these factors may contribute to the female longevity bias seen in human populations.
Collapse
Affiliation(s)
- Jessica M Hoffman
- Department of Biology, University of Alabama at Birmingham, 1300 University Blvd., CH464, Birmingham, AL, 35294, USA.
| | - Teresa G Valencak
- College of Animal Sciences, Zhejiang University, Zijingang Campus, 866 Yuhangtang Road, 310058, Hangzhou, PR China.
| |
Collapse
|
18
|
Chugh D, Iyer CC, Bobbili P, Blatnik AJ, Kaspar BK, Meyer K, Burghes AH, Clark BC, Arnold WD. Voluntary wheel running with and without follistatin overexpression improves NMJ transmission but not motor unit loss in late life of C57BL/6J mice. Neurobiol Aging 2021; 101:285-296. [PMID: 33678425 PMCID: PMC8122043 DOI: 10.1016/j.neurobiolaging.2021.01.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 12/23/2020] [Accepted: 01/16/2021] [Indexed: 01/17/2023]
Abstract
Sarcopenia, or pathological loss of muscle mass and strength during aging, is an important contributor to loss of physical function in older adults. Sarcopenia is a multifactorial syndrome associated with intrinsic muscle and upstream neurological dysfunction. Exercise is well-established as an effective intervention for sarcopenia, but less is known about the long-term neurobiological impact of exercise. The goals of this study were to investigate the effects of exercise, alone or in combination with follistatin (FST) overexpression (antagonist of myostatin), on neuromuscular junction transmission and motor unit numbers in mice between the age of 22 and 27 months, ages at which prior studies have demonstrated that some motor unit loss is already evident. C57BL/6J mice underwent baseline assessment and were randomized to housing with or without voluntary running wheels and injection with adeno-associated virus to overexpress FST or vehicle. Groups for comparison included sedentary and running with and without FST. Longitudinal assessments showed significantly increased muscle mass and contractility in the 'running plus FST' group, but running, with and without FST, showed no effect on motor unit degeneration. In contrast, running, with and without FST, demonstrated marked improvement of neuromuscular junction transmission stability.
Collapse
Affiliation(s)
- Deepti Chugh
- Department of Neurology, Neuromuscular Division, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Chitra C Iyer
- Department of Neurology, Neuromuscular Division, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Prameela Bobbili
- Department of Neurology, Neuromuscular Division, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Anton J Blatnik
- Department of Biological Chemistry and Pharmacology, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Brian K Kaspar
- The Research Institute, Nationwide Children's Hospital, Columbus, OH, USA
| | - Kathrin Meyer
- The Research Institute, Nationwide Children's Hospital, Columbus, OH, USA; Department of Pediatrics, The Ohio State University, Columbus, OH, USA
| | - Arthur Hm Burghes
- Department of Biological Chemistry and Pharmacology, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Brian C Clark
- Ohio Musculoskeletal and Neurological Institute & the Department of Biomedical Sciences, Athens, OH, USA
| | - W David Arnold
- Department of Neurology, Neuromuscular Division, The Ohio State University Wexner Medical Center, Columbus, OH, USA; Department of Physical Medicine and Rehabilitation, The Ohio State University Wexner Medical Center, Columbus, OH, USA; Department of Neuroscience, The Ohio State University Wexner Medical Center, Columbus, OH, USA; Department of Physiology and Cell Biology, The Ohio State University Wexner Medical Center, Columbus, OH, USA.
| |
Collapse
|
19
|
Health and longevity studies in C. elegans: the "healthy worm database" reveals strengths, weaknesses and gaps of test compound-based studies. Biogerontology 2021; 22:215-236. [PMID: 33683565 PMCID: PMC7973913 DOI: 10.1007/s10522-021-09913-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 02/20/2021] [Indexed: 12/11/2022]
Abstract
Several biogerontology databases exist that focus on genetic or gene expression data linked to health as well as survival, subsequent to compound treatments or genetic manipulations in animal models. However, none of these has yet collected experimental results of compound-related health changes. Since quality of life is often regarded as more valuable than length of life, we aim to fill this gap with the “Healthy Worm Database” (http://healthy-worm-database.eu). Literature describing health-related compound studies in the aging model Caenorhabditis elegans was screened, and data for 440 compounds collected. The database considers 189 publications describing 89 different phenotypes measured in 2995 different conditions. Besides enabling a targeted search for promising compounds for further investigations, this database also offers insights into the research field of studies on healthy aging based on a frequently used model organism. Some weaknesses of C. elegans-based aging studies, like underrepresented phenotypes, especially concerning cognitive functions, as well as the convenience-based use of young worms as the starting point for compound treatment or phenotype measurement are discussed. In conclusion, the database provides an anchor for the search for compounds affecting health, with a link to public databases, and it further highlights some potential shortcomings in current aging research.
Collapse
|
20
|
García-Giménez JL, Mena-Molla S, Tarazona-Santabalbina FJ, Viña J, Gomez-Cabrera MC, Pallardó FV. Implementing Precision Medicine in Human Frailty through Epigenetic Biomarkers. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:1883. [PMID: 33672064 PMCID: PMC7919465 DOI: 10.3390/ijerph18041883] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 02/08/2021] [Accepted: 02/09/2021] [Indexed: 12/15/2022]
Abstract
The main epigenetic features in aging are: reduced bulk levels of core histones, altered pattern of histone post-translational modifications, changes in the pattern of DNA methylation, replacement of canonical histones with histone variants, and altered expression of non-coding RNA. The identification of epigenetic mechanisms may contribute to the early detection of age-associated subclinical changes or deficits at the molecular and/or cellular level, to predict the development of frailty, or even more interestingly, to improve health trajectories in older adults. Frailty reflects a state of increased vulnerability to stressors as a result of decreased physiologic reserves, and even dysregulation of multiple physiologic systems leading to adverse health outcomes for individuals of the same chronological age. A key approach to overcome the challenges of frailty is the development of biomarkers to improve early diagnostic accuracy and to predict trajectories in older individuals. The identification of epigenetic biomarkers of frailty could provide important support for the clinical diagnosis of frailty, or more specifically, to the evaluation of its associated risks. Interventional studies aimed at delaying the onset of frailty and the functional alterations associated with it, would also undoubtedly benefit from the identification of frailty biomarkers. Specific to the article yet reasonably common within the subject discipline.
Collapse
Affiliation(s)
- José Luis García-Giménez
- U733, Centre for Biomedical Network Research on Rare Diseases (CIBERER-ISCIII), 28029 Madrid, Spain; (J.L.G.-G.); (F.V.P.)
- Mixed Unit for Rare Diseases INCLIVA-CIPF, INCLIVA Health Research Institute, 46010 Valencia, Spain
- Department of Physiology, Faculty of Medicine, University of Valencia, 46003 Valencia, Spain;
- EpiDisease S.L., Parc Cientific de la Universitat de València, 46980 Paterna, Spain
| | - Salvador Mena-Molla
- Department of Physiology, Faculty of Medicine, University of Valencia, 46003 Valencia, Spain;
- EpiDisease S.L., Parc Cientific de la Universitat de València, 46980 Paterna, Spain
| | | | - Jose Viña
- Freshage Research Group, Department of Physiology, Faculty of Medicine, Institute of Health Research-INCLIVA, University of Valencia and CIBERFES, 46010 Valencia, Spain;
| | - Mari Carmen Gomez-Cabrera
- Freshage Research Group, Department of Physiology, Faculty of Medicine, Institute of Health Research-INCLIVA, University of Valencia and CIBERFES, 46010 Valencia, Spain;
| | - Federico V. Pallardó
- U733, Centre for Biomedical Network Research on Rare Diseases (CIBERER-ISCIII), 28029 Madrid, Spain; (J.L.G.-G.); (F.V.P.)
- Mixed Unit for Rare Diseases INCLIVA-CIPF, INCLIVA Health Research Institute, 46010 Valencia, Spain
- Department of Physiology, Faculty of Medicine, University of Valencia, 46003 Valencia, Spain;
- EpiDisease S.L., Parc Cientific de la Universitat de València, 46980 Paterna, Spain
| |
Collapse
|
21
|
Baek KW, Lee DI, Jeong MJ, Kang SA, Choe Y, Yoo JI, Yu HS, Kim JS. Effects of lifelong spontaneous exercise on the M1/M2 macrophage polarization ratio and gene expression in adipose tissue of super-aged mice. Exp Gerontol 2020; 141:111091. [PMID: 32931843 DOI: 10.1016/j.exger.2020.111091] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 08/31/2020] [Accepted: 09/08/2020] [Indexed: 02/04/2023]
Abstract
In the adipose tissue (AT), an increase in the M1 macrophage (M1Ø)/M2 macrophage (M2Ø) polarization ratio can be a risk factor enhancing the inflammatory response during aging, as well as increasing the risk of chronic disease, thereby reducing lifespan, or at least reducing "healthy" lifespan. The purpose of this study was to analyze and compare the AT M1Ø/M2Ø polarization ratio at the final lifespan stage in aged and control animals performing lifelong spontaneous wheel running. Based on flow cytometric analysis, the AT ratio of macrophages revealed M2Ø polarization following lifelong spontaneous exercise (LSE) regardless of age. However, for Icam1 and Tnf, the qPCR analysis showed no difference in gene expressions in young mice; Arg1 expression was higher in Young-EXE (exercising) than in Young-CON (control) mice (p < .0001). In Old-EXE, Icam1 (p < .0001) and Tnf (p < .0001) expression were lower than in Old-CON; for Arg1, gene expression in Old-EXE was higher than in Old-CON (p < .0001). LSE prevents deterioration of physical fitness owing to aging, maintaining high M2Ø polarization levels in the AT. Additionally, LSE does not downregulate Icam1 and Tnf in the AT but appears to suppress the increased M1Ø polarization ratio attributed to aging by upregulating Arg1.
Collapse
Affiliation(s)
- Kyung-Wan Baek
- Department of Physical Education, Gyeongsang National University, Jinju, Republic of Korea; Department of Parasitology and Tropical Medicine, Pusan National University School of Medicine, Yangsan, Republic of Korea; Department of Orthopaedic Surgery, Gyeongsang National University Hospital, Jinju, Republic of Korea
| | - Da-In Lee
- Department of Parasitology and Tropical Medicine, Pusan National University School of Medicine, Yangsan, Republic of Korea
| | - Mi-Jin Jeong
- Department of Parasitology and Tropical Medicine, Pusan National University School of Medicine, Yangsan, Republic of Korea
| | - Shin Ae Kang
- Department of Parasitology and Tropical Medicine, Pusan National University School of Medicine, Yangsan, Republic of Korea
| | - Yongho Choe
- Department of Veterinary Medicine, Gyeongsang National University, Jinju, Republic of Korea
| | - Jun-Il Yoo
- Department of Orthopaedic Surgery, Gyeongsang National University Hospital, Jinju, Republic of Korea
| | - Hak Sun Yu
- Department of Parasitology and Tropical Medicine, Pusan National University School of Medicine, Yangsan, Republic of Korea; Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Republic of Korea..
| | - Ji-Seok Kim
- Department of Physical Education, Gyeongsang National University, Jinju, Republic of Korea.
| |
Collapse
|
22
|
Álvarez-Satta M, Berna-Erro A, Carrasco-Garcia E, Alberro A, Saenz-Antoñanzas A, Vergara I, Otaegui D, Matheu A. Relevance of oxidative stress and inflammation in frailty based on human studies and mouse models. Aging (Albany NY) 2020; 12:9982-9999. [PMID: 32461379 PMCID: PMC7288972 DOI: 10.18632/aging.103295] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 04/28/2020] [Indexed: 12/16/2022]
Abstract
Frailty represents a state of vulnerability and increases the risk of negative health outcomes, which is becoming an important public health problem. Over recent years, multiple independent studies have attempted to identify biomarkers that can predict, diagnose, and monitor frailty at the biological level. Among them, several promising candidates have been associated with frailty status including antioxidants and free radicals, and also inflammatory response biomarkers. In this review, we will summarize the more recent advances in this field. Moreover, the identification of scales and measurements to detect and quantify frailty in aged mice, as well as the generation of mouse models, have started to unravel the underlying biological and molecular mechanisms of frailty. We will discuss them here with an emphasis on murine models with overexpression of glucose-6-phosphate dehydrogenase and loss of function of superoxide dismutase and interleukin 10, which reveal that altered oxidative stress and inflammation pathways are involved in the physiopathology of frailty. In summary, we provide the current available evidence, from both human cohorts and experimental animal models, that highlights oxidative damage and inflammation as relevant biomarkers and drivers of frailty.
Collapse
Affiliation(s)
- María Álvarez-Satta
- Group of Cellular Oncology, Biodonostia Health Research Institute, San Sebastian, Spain.,CIBER of Frailty and Healthy Aging (CIBERfes), Spain
| | - Alejandro Berna-Erro
- Group of Cellular Oncology, Biodonostia Health Research Institute, San Sebastian, Spain
| | - Estefania Carrasco-Garcia
- Group of Cellular Oncology, Biodonostia Health Research Institute, San Sebastian, Spain.,CIBER of Frailty and Healthy Aging (CIBERfes), Spain
| | - Ainhoa Alberro
- Group of Multiple Sclerosis, Biodonostia Health Research Institute, San Sebastian, Spain
| | | | - Itziar Vergara
- Group of Primary Health, Biodonostia Health Research Institute, San Sebastian, Spain, Health Services Research on Chronic Patients Network (REDISSEC), Spain
| | - David Otaegui
- Group of Multiple Sclerosis, Biodonostia Health Research Institute, San Sebastian, Spain.,Spanish Network of Multiple Sclerosis, Spain
| | - Ander Matheu
- Group of Cellular Oncology, Biodonostia Health Research Institute, San Sebastian, Spain.,CIBER of Frailty and Healthy Aging (CIBERfes), Spain.,IKERBASQUE, Basque Foundation, Bilbao, Spain
| |
Collapse
|
23
|
Singh PP, Demmitt BA, Nath RD, Brunet A. The Genetics of Aging: A Vertebrate Perspective. Cell 2020; 177:200-220. [PMID: 30901541 DOI: 10.1016/j.cell.2019.02.038] [Citation(s) in RCA: 136] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 02/21/2019] [Accepted: 02/22/2019] [Indexed: 02/07/2023]
Abstract
Aging negatively impacts vitality and health. Many genetic pathways that regulate aging were discovered in invertebrates. However, the genetics of aging is more complex in vertebrates because of their specialized systems. This Review discusses advances in the genetic regulation of aging in vertebrates from work in mice, humans, and organisms with exceptional lifespans. We highlight challenges for the future, including sex-dependent differences in lifespan and the interplay between genes and environment. We also discuss how the identification of reliable biomarkers of age and development of new vertebrate models can be leveraged for personalized interventions to counter aging and age-related diseases.
Collapse
Affiliation(s)
- Param Priya Singh
- Department of Genetics, Stanford University, Stanford, CA 94305, USA
| | | | - Ravi D Nath
- Department of Genetics, Stanford University, Stanford, CA 94305, USA
| | - Anne Brunet
- Department of Genetics, Stanford University, Stanford, CA 94305, USA; Glenn Laboratories for the Biology of Aging, Stanford, CA 94305, USA.
| |
Collapse
|
24
|
Kim YJ, Kim HJ, Lee WJ, Seong JK. A comparison of the metabolic effects of treadmill and wheel running exercise in mouse model. Lab Anim Res 2020; 36:3. [PMID: 32206610 PMCID: PMC7081706 DOI: 10.1186/s42826-019-0035-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Accepted: 12/27/2019] [Indexed: 02/02/2023] Open
Abstract
Aerobic exercise is well known to have a positive impact on body composition, muscle strength, and oxidative capacity. In animal model, both treadmill and wheel running exercise modalities have become more popular, in order to study physiological adaptation associated with aerobic exercise. However, few studies have compared physiological adaptations in response to either treadmill exercise (TE), or voluntary wheel running exercise (WE). We therefore compared each exercise intervention on body composition and oxidative markers in male C57BL/6 N mice. The total distance run was remarkably higher in the WE group than in the TE group. Both forms of exercise resulted in the reduction of body weight, fat mass, and adipocyte size. However, the average for grip strength of WE was higher than for control and TE. Interestingly, PGC-1α expression was increased in the gastrocnemius (glycolytic-oxidative) and soleus (oxidative) muscle of TE group, whereas WE showed a significant effect on PGC-1α expression only in the soleus muscle. However, muscle fiber type composition was not shifted remarkably in either type of exercise. These results suggest that TE and WE may exert beneficial effects in suppressing metabolic risks in mouse model through attenuating body weight, fat mass, size, and increase in mitochondria biogenesis marker, PGC-1α.
Collapse
Affiliation(s)
- Youn Ju Kim
- 1Laboratory of Developmental Biology and Genomics, BK21 Program for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, South Korea.,2The Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, 08826 Republic of Korea.,3Korea Mouse Phenotyping Center (KMPC), Seoul National University, 08826 Seoul, Republic of Korea
| | - Hye Jin Kim
- 2The Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, 08826 Republic of Korea.,3Korea Mouse Phenotyping Center (KMPC), Seoul National University, 08826 Seoul, Republic of Korea
| | - Won Jun Lee
- 4Severance Biomedical Science Institute, Yonsei University College of Medicine, Seoul, 03722 South Korea
| | - Je Kyung Seong
- 1Laboratory of Developmental Biology and Genomics, BK21 Program for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, South Korea.,2The Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, 08826 Republic of Korea.,3Korea Mouse Phenotyping Center (KMPC), Seoul National University, 08826 Seoul, Republic of Korea.,5Interdisciplinary Program for Bioinformatics, Program for Cancer Biology, BIO-MAX/N-Bio Institute, Seoul National University, 08826 Seoul, Republic of Korea
| |
Collapse
|
25
|
Kim M, Sujkowski A, Namkoong S, Gu B, Cobb T, Kim B, Kowalsky AH, Cho CS, Semple I, Ro SH, Davis C, Brooks SV, Karin M, Wessells RJ, Lee JH. Sestrins are evolutionarily conserved mediators of exercise benefits. Nat Commun 2020; 11:190. [PMID: 31929512 PMCID: PMC6955242 DOI: 10.1038/s41467-019-13442-5] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 11/06/2019] [Indexed: 01/04/2023] Open
Abstract
Exercise is among the most effective interventions for age-associated mobility decline and metabolic dysregulation. Although long-term endurance exercise promotes insulin sensitivity and expands respiratory capacity, genetic components and pathways mediating the metabolic benefits of exercise have remained elusive. Here, we show that Sestrins, a family of evolutionarily conserved exercise-inducible proteins, are critical mediators of exercise benefits. In both fly and mouse models, genetic ablation of Sestrins prevents organisms from acquiring metabolic benefits of exercise and improving their endurance through training. Conversely, Sestrin upregulation mimics both molecular and physiological effects of exercise, suggesting that it could be a major effector of exercise metabolism. Among the various targets modulated by Sestrin in response to exercise, AKT and PGC1α are critical for the Sestrin effects in extending endurance. These results indicate that Sestrin is a key integrating factor that drives the benefits of chronic exercise to metabolism and physical endurance.
Collapse
Affiliation(s)
- Myungjin Kim
- Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Alyson Sujkowski
- Department of Physiology, Wayne State University School of Medicine, Detroit, MI, 48201, USA
| | - Sim Namkoong
- Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI, 48109, USA
- Department of Biochemistry, College of Natural Sciences, Kangwon National University, Chuncheon, Gangwon, 24341, Republic of Korea
| | - Bondong Gu
- Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Tyler Cobb
- Department of Physiology, Wayne State University School of Medicine, Detroit, MI, 48201, USA
| | - Boyoung Kim
- Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Allison H Kowalsky
- Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Chun-Seok Cho
- Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Ian Semple
- Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Seung-Hyun Ro
- Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI, 48109, USA
- Department of Biochemistry, University of Nebraska, Lincoln, NE, 68588, USA
| | - Carol Davis
- Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Susan V Brooks
- Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Michael Karin
- Department of Pharmacology, University of California San Diego, La Jolla, CA, 92093, USA
| | - Robert J Wessells
- Department of Physiology, Wayne State University School of Medicine, Detroit, MI, 48201, USA.
| | - Jun Hee Lee
- Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI, 48109, USA.
| |
Collapse
|
26
|
Arc-Chagnaud C, Millan F, Salvador-Pascual A, Correas A, Olaso-Gonzalez G, De la Rosa A, Carretero A, Gomez-Cabrera M, Viña J. Reversal of age-associated frailty by controlled physical exercise: The pre-clinical and clinical evidences. SPORTS MEDICINE AND HEALTH SCIENCE 2019; 1:33-39. [PMID: 35782461 PMCID: PMC9219339 DOI: 10.1016/j.smhs.2019.08.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Demographic aging is one of the most serious challenges facing our society. Although we live longer, we do not live better because it is considered that approximately 16–20% of our life is spent in late-life morbidity. Older people have the greatest risk of developing frailty increasing the risk of presenting various adverse health events such as low quality of life, disability, hospitalization and even death. Frail men and women over 65 years old have lower muscle quality and muscle mass and higher percentage of body fat than non-frail people of the same age. In this review we will address the main physiological changes in the muscular and nervous system associated to aging. More specifically we will review the changes in muscle mass, quality, and strength relating them with the decrease in capillarization and muscular oxidative capacity as well as with the alterations in protein synthesis in the muscle with aging. The last section of the manuscript will be devoted to the animal models of frailty and the indexes developed to measure frailty in these models. We will finally address the importance of exercise training as an intervention to delay or even reverse frailty.
Collapse
Affiliation(s)
- C. Arc-Chagnaud
- Freshage Research Group, Department of Physiology, Faculty of Medicine, University of Valencia and CIBERFES, Fundación Investigación Hospital Clínico Universitario/INCLIVA, Valencia, Spain
- INRA, UMR866 Dynamique Musculaire et Métabolisme, Université de Montpellier, F-34060, Montpellier, France
| | - F. Millan
- Freshage Research Group, Department of Physiology, Faculty of Medicine, University of Valencia and CIBERFES, Fundación Investigación Hospital Clínico Universitario/INCLIVA, Valencia, Spain
| | - A. Salvador-Pascual
- Freshage Research Group, Department of Physiology, Faculty of Medicine, University of Valencia and CIBERFES, Fundación Investigación Hospital Clínico Universitario/INCLIVA, Valencia, Spain
| | - A.G. Correas
- Freshage Research Group, Department of Physiology, Faculty of Medicine, University of Valencia and CIBERFES, Fundación Investigación Hospital Clínico Universitario/INCLIVA, Valencia, Spain
| | - G. Olaso-Gonzalez
- Freshage Research Group, Department of Physiology, Faculty of Medicine, University of Valencia and CIBERFES, Fundación Investigación Hospital Clínico Universitario/INCLIVA, Valencia, Spain
| | - A. De la Rosa
- Freshage Research Group, Department of Physiology, Faculty of Medicine, University of Valencia and CIBERFES, Fundación Investigación Hospital Clínico Universitario/INCLIVA, Valencia, Spain
| | - A. Carretero
- Freshage Research Group, Department of Physiology, Faculty of Medicine, University of Valencia and CIBERFES, Fundación Investigación Hospital Clínico Universitario/INCLIVA, Valencia, Spain
| | - M.C. Gomez-Cabrera
- Freshage Research Group, Department of Physiology, Faculty of Medicine, University of Valencia and CIBERFES, Fundación Investigación Hospital Clínico Universitario/INCLIVA, Valencia, Spain
- Corresponding author. Av. Blasco Ibañez 15, 46010, Valencia, Spain.
| | - J. Viña
- Freshage Research Group, Department of Physiology, Faculty of Medicine, University of Valencia and CIBERFES, Fundación Investigación Hospital Clínico Universitario/INCLIVA, Valencia, Spain
| |
Collapse
|
27
|
Abstract
To objectively assess physical activity levels and sedentary behavior in a cohort of Spanish centenarians and their nonagenarian peers. Physical activity and sedentary behavior patterns were objectively measured by an ActiGraph GT3X accelerometer in centenarians (n = 18; 83% women; 100.8 ± 0.8 [100-103] years) and nonagenarians (n = 11; 91% women; 93.3 ± 2.5 [90-98] years). Centenarians showed less counts per minute (17.6 ± 7.1 vs. 46.1 ± 23.7, p = .003, d = 1.851) and steps per day (455 ± 237 vs. 1,249 ± 776, p = .007, d = 1.587) than nonagenarians. The daily number of sedentary breaks was also lower in the former (5.0 ± 1.5 vs. 6.7 ± 2.0, p = .019, d = 0.971). When observing time distribution, the most active day period in both groups was the morning, with a peak between 10:00 and 11:59. This data suggest that the decline in physical activity levels continues to worsen until the end of the human lifespan.
Collapse
|
28
|
Fragilidad en pacientes mayores de 65 años ingresados en cuidados intensivos (FRAIL-ICU). Med Intensiva 2019; 43:395-401. [DOI: 10.1016/j.medin.2019.01.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 01/26/2019] [Accepted: 01/28/2019] [Indexed: 11/16/2022]
|
29
|
LAV-BPIFB4 associates with reduced frailty in humans and its transfer prevents frailty progression in old mice. Aging (Albany NY) 2019; 11:6555-6568. [PMID: 31461407 PMCID: PMC6738439 DOI: 10.18632/aging.102209] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 08/12/2019] [Indexed: 12/24/2022]
Abstract
Background: There is an increasing concern about age-related frailty because of the growing number of elderly people in the general population. The Longevity-Associated Variant (LAV) of the human BPIFB4 gene was found to correct endothelial dysfunction, one of the mechanisms underlying frailty, in aging mice whereas the RV-BPIFB4 variant induced opposite effects. Thus, we newly hypothesize that, besides being associated with life expectancy, BPIFB4 polymorphisms can predict frailty. Aim and Results: Here we investigated if the BPIFB4 haplotypes, LAV, wild-type (WT) and RV, differentially associate with frailty in a cohort of 237 elderly subjects from Calabria region in Southern Italy. Moreover, we studied the effect of systemic adeno-associated viral vector-mediated LAV-BPIFB4 gene transfer on the progression of frailty in aging mice. We found an inverse correlation of the homozygous LAV-BPIFB4 haplotype with frailty in elderly subjects. Conversely, carriers of the RV-BPIFB4 haplotype showed an increase in the frailty status and risk of death. Moreover, in old mice, LAV-BPIFB4 gene transfer delayed frailty progression. Conclusions: These data indicate that specific BPIFB4 haplotypes could represent useful genetic markers of frailty. In addition, horizontal transfer of a healthy gene variant can attenuate frailty in aging organisms.
Collapse
|
30
|
McKie GL, Medak KD, Knuth CM, Shamshoum H, Townsend LK, Peppler WT, Wright DC. Housing temperature affects the acute and chronic metabolic adaptations to exercise in mice. J Physiol 2019; 597:4581-4600. [PMID: 31297830 DOI: 10.1113/jp278221] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 06/14/2019] [Indexed: 12/21/2022] Open
Abstract
KEY POINTS Mice are commonly housed at room temperatures below their thermoneutral zone meaning they are exposed to chronic thermal stress. Endurance exercise induces browning and mitochondrial biogenesis in white adipose tissue of rodents, but there are conflicting reports of this phenomenon in humans. We hypothesized that the ambient room temperature at which mice are housed could partially explain these discrepant reports between humans and rodents. We housed mice at room temperature or thermoneutrality and studied their physiological responses to acute and chronic exercise. We found that thermoneutral housing altered running behaviour and glucose homeostasis, and further, that exercise-induced markers of mitochondrial biogenesis and the browning of white adipose tissue were reduced in mice housed at thermoneutrality. ABSTRACT Mice are often housed at temperatures below their thermoneutral zone resulting in compensatory increases in thermogenesis. Despite this, many studies report housing mice at room temperature (RT), likely for the convenience of the researchers studying them. As such, the conflicting reports between humans and rodents regarding the ability of exercise to increase mitochondrial and thermogenic markers in white adipose tissue may be explained by the often-overlooked variable, housing temperature. To test this hypothesis, we housed male C57BL/6 mice at RT (22°C) or thermoneutrality (TN) (29°C) with or without access to a voluntary running wheel for 6 weeks or subjected them to an acute exhaustive bout of treadmill running. We examined the gene expression and protein content of select mitochondrial and thermogenic markers in skeletal muscle, epididymal white adipose tissue (eWAT), inguinal white adipose tissue (iWAT) and brown adipose tissue (BAT). We also assessed adipocyte morphology and indices of glucose homeostasis. Housing temperature influenced glucose tolerance and insulin action in vivo, yet the beneficial effects of exercise, both acute and chronic, remained intact in eWAT, BAT and skeletal muscle irrespective of housing temperature. Housing mice at TN led to an attenuation of some of the effects of exercise on iWAT. Collectively, we present data characterizing the acute and chronic metabolic adaptations to exercise at different housing temperatures and demonstrate, for the first time, that temperature influences the ability of exercise to increase markers of mitochondrial biogenesis and the browning of white adipose tissue.
Collapse
Affiliation(s)
- Greg L McKie
- Department of Human Health & Nutritional Sciences, University of Guelph, Guelph, ON, Canada
| | - Kyle D Medak
- Department of Human Health & Nutritional Sciences, University of Guelph, Guelph, ON, Canada
| | - Carly M Knuth
- Department of Human Health & Nutritional Sciences, University of Guelph, Guelph, ON, Canada.,Sunnybrook Research Institute, University of Toronto, Toronto, ON, Canada
| | - Hesham Shamshoum
- Department of Human Health & Nutritional Sciences, University of Guelph, Guelph, ON, Canada
| | - Logan K Townsend
- Department of Human Health & Nutritional Sciences, University of Guelph, Guelph, ON, Canada
| | - Willem T Peppler
- Department of Human Health & Nutritional Sciences, University of Guelph, Guelph, ON, Canada.,Toronto General Hospital Research Institute, University Health Network, Toronto, ON, Canada
| | - David C Wright
- Department of Human Health & Nutritional Sciences, University of Guelph, Guelph, ON, Canada
| |
Collapse
|
31
|
Rusanova I, Fernández-Martínez J, Fernández-Ortiz M, Aranda-Martínez P, Escames G, García-García FJ, Mañas L, Acuña-Castroviejo D. Involvement of plasma miRNAs, muscle miRNAs and mitochondrial miRNAs in the pathophysiology of frailty. Exp Gerontol 2019; 124:110637. [PMID: 31199979 DOI: 10.1016/j.exger.2019.110637] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 06/06/2019] [Accepted: 06/10/2019] [Indexed: 02/08/2023]
Abstract
Frailty is a geriatric syndrome that leads not only to the loss of physical functions, but also to a generalized decline of the organism and a high risk of disability and dependency. Frailty's detection and management represent important goals for current gerontology. The advance in its rapid diagnosis could play a relevant role in taking measures to reduce the negative consequences it exerts on the body and to take preventive measures. microRNAs are the one of multiple epigenetic biomarkers that reflect functional changes in aged subject. In this review we analyze microRNAs as molecules involved in the control of the pathways leading to the development of frailty. miRNAs can be present in different body fluids, including plasma/serum and saliva, can be associated with organelles like the mitochondria, and can be expressed in tissues. Based on the multifactorial physiopathology of frailty, we analyzed here the microRNAs linked to "inflammaging" (inflamma-miRs), to musculoskeletal health (myomiRs), and microRNAs that can directly or indirectly affect the mitochondria (mitomiRs). Subsequently, we analyze those microRNAs that can be modified by physical exercise. In this review we will analyze the latest experimental studies carried out in animals, cell cultures, and human samples, with the aim to identify gaps in the research and in order to try to dazzle the information about the pathways regulated by each miRNA. Multiple studies revised here suggest that several miRs can be considered as possible markers of frailty, including miR-1, miR-21, miR-34a, miR-146a, miR-185, and miR-206, miR-223, among others. Normalization of miRNAs data and standardization of the protocols used for their measurement to avoid confounding variables influencing the results, are important to use miRNAs as disease biomarkers.
Collapse
Affiliation(s)
- Iryna Rusanova
- Departamento de Fisiología, Facultad de Medicina, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Granada, Spain; CIBERfes, Ibs.Granada, and UGC de Laboratorios Clínicos, Complejo Hospitalario de Granada, Granada, Spain.
| | - José Fernández-Martínez
- Departamento de Fisiología, Facultad de Medicina, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Granada, Spain
| | - Marisol Fernández-Ortiz
- Departamento de Fisiología, Facultad de Medicina, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Granada, Spain
| | - Paula Aranda-Martínez
- Departamento de Fisiología, Facultad de Medicina, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Granada, Spain
| | - Germaine Escames
- Departamento de Fisiología, Facultad de Medicina, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Granada, Spain; CIBERfes, Ibs.Granada, and UGC de Laboratorios Clínicos, Complejo Hospitalario de Granada, Granada, Spain
| | - Francisco J García-García
- CIBERfes, División de Medicina Geriátrica, Hospital Virgen del Valle, Complejo Hospitalario de Toledo, Toledo, Spain
| | - Leocadio Mañas
- CIBERfes, Servicio de Geriatría, Hospital Universitario de Getafe, Madrid, Spain
| | - Darío Acuña-Castroviejo
- Departamento de Fisiología, Facultad de Medicina, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Granada, Spain; CIBERfes, Ibs.Granada, and UGC de Laboratorios Clínicos, Complejo Hospitalario de Granada, Granada, Spain.
| |
Collapse
|
32
|
Salamon A, Torok R, Sumegi E, Boros F, Pesei ZG, Fort Molnar M, Veres G, Zadori D, Vecsei L, Klivenyi P. The effect of physical stimuli on the expression level of key elements in mitochondrial biogenesis. Neurosci Lett 2019; 698:13-18. [PMID: 30611892 DOI: 10.1016/j.neulet.2019.01.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 12/22/2018] [Accepted: 01/02/2019] [Indexed: 12/12/2022]
Abstract
Proper mitochondrial function is crucial for intact cellular homeostasis. Mitochondrial dysfunction is clearly involved in the pathogenesis of most neurodegenerative- and age-related chronic disorders. The aim of this study is to stimulate cellular production of important compounds of mitochondrial biogenesis, namely in the peroxisome proliferator-activated receptor-gamma coactivator (PGC)- and Sirtuin (SIRT)-systems. We studied the effect of cold challenge and training on the mRNA expression levels of some compounds of these systems in different brain areas of mice. With regard to the PGC-system, the mRNA levels of the full- and N-truncated isoforms, and those of the two promoters (brain-specific, reference) were measured. In case of Sirtuins, the mRNA levels of SIRT1 and SIRT3-M1/M2/M3 were assessed. We found the following expression level alterations: cooling resulted in the elevation of cortical SIRT3-M1 levels and the decrease of cerebellar SIRT3-M3 levels after 200 min. 900 min of cold exposure resulted in the reduction of cortical SIRT1 and striatal SIRT3-M1 levels. A prominent elevation could be observed in the levels of all PGC-1α isoforms in the cerebellum after 12 days of training. The 12 days of exercise resulted in increased cerebellar SIRT3-M1 and SIRT3-M2 mRNA levels as well. Although the efficacy of cooling core body and brain temperature is questionable, we found that training exerted a clear effect. The cause of the prominent cerebellar elevation of PGC-, and Sirtuin isoforms could be an increase in synaptic plasticity between Purkinje cells, which facilitates better motor coordination and more precise movement integration. We propose that these systems may serve as promising targets for future therapeutic studies in neurodegenerative diseases.
Collapse
Affiliation(s)
- Andras Salamon
- Department of Neurology, University of Szeged, Semmelweis u. 6, H-6725, Szeged, Hungary
| | - Rita Torok
- Department of Neurology, University of Szeged, Semmelweis u. 6, H-6725, Szeged, Hungary
| | - Evelin Sumegi
- Department of Neurology, University of Szeged, Semmelweis u. 6, H-6725, Szeged, Hungary
| | - Fanni Boros
- Department of Neurology, University of Szeged, Semmelweis u. 6, H-6725, Szeged, Hungary
| | | | - Mate Fort Molnar
- Department of Neurology, University of Szeged, Semmelweis u. 6, H-6725, Szeged, Hungary
| | - Gabor Veres
- Department of Neurology, University of Szeged, Semmelweis u. 6, H-6725, Szeged, Hungary
| | - Denes Zadori
- Department of Neurology, University of Szeged, Semmelweis u. 6, H-6725, Szeged, Hungary
| | - Laszlo Vecsei
- Department of Neurology, University of Szeged, Semmelweis u. 6, H-6725, Szeged, Hungary; MTA-SZTE Neuroscience Research Group of the Hungarian Academy of Sciences and University of Szeged, Semmelweis u. 6, H-6725, Szeged, Hungary
| | - Peter Klivenyi
- Department of Neurology, University of Szeged, Semmelweis u. 6, H-6725, Szeged, Hungary.
| |
Collapse
|
33
|
Nilsson MI, Bourgeois JM, Nederveen JP, Leite MR, Hettinga BP, Bujak AL, May L, Lin E, Crozier M, Rusiecki DR, Moffatt C, Azzopardi P, Young J, Yang Y, Nguyen J, Adler E, Lan L, Tarnopolsky MA. Lifelong aerobic exercise protects against inflammaging and cancer. PLoS One 2019; 14:e0210863. [PMID: 30682077 PMCID: PMC6347267 DOI: 10.1371/journal.pone.0210863] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2018] [Accepted: 01/03/2019] [Indexed: 12/16/2022] Open
Abstract
Biological aging is associated with progressive damage accumulation, loss of organ reserves, and systemic inflammation ('inflammaging'), which predispose for a wide spectrum of chronic diseases, including several types of cancer. In contrast, aerobic exercise training (AET) reduces inflammation, lowers all-cause mortality, and enhances both health and lifespan. In this study, we examined the benefits of early-onset, lifelong AET on predictors of health, inflammation, and cancer incidence in a naturally aging mouse model (C57BL/J6). Lifelong, voluntary wheel-running (O-AET; 26-month-old) prevented age-related declines in aerobic fitness and motor coordination vs. age-matched, sedentary controls (O-SED). AET also provided partial protection against sarcopenia, dynapenia, testicular atrophy, and overall organ pathology, hence augmenting the 'physiologic reserve' of lifelong runners. Systemic inflammation, as evidenced by a chronic elevation in 17 of 18 pro- and anti-inflammatory cytokines and chemokines (P < 0.05 O-SED vs. 2-month-old Y-CON), was potently mitigated by lifelong AET (P < 0.05 O-AET vs. O-SED), including master regulators of the cytokine cascade and cancer progression (IL-1β, TNF-α, and IL-6). In addition, circulating SPARC, previously known to be upregulated in metabolic disease, was elevated in old, sedentary mice, but was normalized to young control levels in lifelong runners. Remarkably, malignant tumours were also completely absent in the O-AET group, whereas they were present in the brain (pituitary), liver, spleen, and intestines of sedentary mice. Collectively, our results indicate that early-onset, lifelong running dampens inflammaging, protects against multiple cancer types, and extends healthspan of naturally-aged mice.
Collapse
Affiliation(s)
- Mats I. Nilsson
- Department of Pathology and Molecular Medicine, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
- Exerkine Corporation, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Jacqueline M. Bourgeois
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Joshua P. Nederveen
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Marlon R. Leite
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Bart P. Hettinga
- Exerkine Corporation, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Adam L. Bujak
- Exerkine Corporation, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Linda May
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Ethan Lin
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Michael Crozier
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Daniel R. Rusiecki
- Exerkine Corporation, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Chris Moffatt
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Paul Azzopardi
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Jacob Young
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Yifan Yang
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Jenny Nguyen
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Ethan Adler
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Lucy Lan
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| | - Mark A. Tarnopolsky
- Exerkine Corporation, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
- Department of Pediatrics, McMaster University Medical Center (MUMC), Hamilton, Ontario, Canada
| |
Collapse
|
34
|
Ji N, Zhao W, Qian H, Yan X, Zong R, Zhang Y, Lao K. Aerobic exercise promotes the expression of ERCC1 to prolong lifespan: A new possible mechanism. Med Hypotheses 2018; 122:22-25. [PMID: 30593415 DOI: 10.1016/j.mehy.2018.10.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 09/22/2018] [Accepted: 10/16/2018] [Indexed: 12/25/2022]
Abstract
Aerobic exercise can delay aging and extend lifespan, but its specific mechanism still remains unclear. One popular theory is that with age and the cell division times increasing, DNA damage will inevitably accumulate, leading to dysfunction and failure of various tissues and organs, which will eventually lead to aging. Thus, repairing damaged DNA is a key strategy to extend lifespan. Excision repair cross-complementary gene 1 (ERCC1) is a DNA repair enzyme that recognizes, excises and repairs damaged DNA. Defects or reduced activity of the enzyme can lead to DNA damage accumulation. This study provides that aerobic exercise can significantly extend rats' lifespan and increase the expression of ERCC1 in heart, brain, liver and kidney. Therefore, based on our experiments, we propose the following scientific hypothesis: aerobic exercise can up-regulate the expression of ERCC1 and then may reduce DNA damage accumulation to maintain genomic integrity and stability, thereby delaying aging and prolonging lifespan in humans.
Collapse
Affiliation(s)
- Naichun Ji
- Department of Physical Education & Shaanxi Key Laboratory of Brain Disorders & Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an 710021, China
| | - Wenpeng Zhao
- Department of Physical Education & Shaanxi Key Laboratory of Brain Disorders & Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an 710021, China
| | - Huiming Qian
- Department of Physical Education & Shaanxi Key Laboratory of Brain Disorders & Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an 710021, China
| | - Xinyu Yan
- Department of Physical Education & Shaanxi Key Laboratory of Brain Disorders & Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an 710021, China
| | - Rong Zong
- Department of Physical Education & Shaanxi Key Laboratory of Brain Disorders & Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an 710021, China
| | - Yuelin Zhang
- Department of Physical Education & Shaanxi Key Laboratory of Brain Disorders & Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an 710021, China
| | - Kejing Lao
- Department of Physical Education & Shaanxi Key Laboratory of Brain Disorders & Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an 710021, China.
| |
Collapse
|
35
|
Teo E, Batchu KC, Barardo D, Xiao L, Cazenave-Gassiot A, Tolwinski N, Wenk M, Halliwell B, Gruber J. A novel vibration-induced exercise paradigm improves fitness and lipid metabolism of Caenorhabditis elegans. Sci Rep 2018; 8:9420. [PMID: 29925926 PMCID: PMC6010440 DOI: 10.1038/s41598-018-27330-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 05/08/2018] [Indexed: 12/11/2022] Open
Abstract
Exercise has been known to reduce the risk of obesity and metabolic syndrome, but the mechanisms underlying many exercise benefits remain unclear. This is, in part, due to a lack of exercise paradigms in invertebrate model organisms that would allow rapid mechanistic studies to be conducted. Here we report a novel exercise paradigm in Caenorhabditis elegans (C. elegans) that can be implemented under standard laboratory conditions. Mechanical stimulus in the form of vibration was transduced to C. elegans grown on solid agar media using an acoustic actuator. One day post-exercise, the exercised animals showed greater physical fitness compared to the un-exercised controls. Despite having higher mitochondrial reactive oxygen species levels, no mitohormetic adaptations and lifespan extension were observed in the exercised animals. Nonetheless, exercised animals showed lower triacylglycerides (TAG) accumulation than the controls. Among the individual TAG species, the most significant changes were found in mono- and polyunsaturated fatty acid residues. Such alteration resulted in an overall lower double bond index and peroxidation index which measure susceptibility towards lipid peroxidation. These observations are consistent with findings from mammalian exercise literature, suggesting that exercise benefits are largely conserved across different animal models.
Collapse
Affiliation(s)
- Emelyne Teo
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore, Singapore
| | | | - Diogo Barardo
- Department of Biochemistry, National University of Singapore, Singapore, Singapore
- Science Division, Yale-NUS College, Singapore, Singapore
| | - Linfan Xiao
- Science Division, Yale-NUS College, Singapore, Singapore
| | - Amaury Cazenave-Gassiot
- Singapore Lipidomics Incubator, National University of Singapore, Singapore, Singapore
- Department of Biochemistry, National University of Singapore, Singapore, Singapore
| | | | - Markus Wenk
- Singapore Lipidomics Incubator, National University of Singapore, Singapore, Singapore
- Department of Biochemistry, National University of Singapore, Singapore, Singapore
| | - Barry Halliwell
- Department of Biochemistry, National University of Singapore, Singapore, Singapore
| | - Jan Gruber
- Department of Biochemistry, National University of Singapore, Singapore, Singapore.
- Science Division, Yale-NUS College, Singapore, Singapore.
| |
Collapse
|
36
|
Induction of prolonged natural lifespans in mice exposed to acoustic environmental enrichment. Sci Rep 2018; 8:7909. [PMID: 29786063 PMCID: PMC5962611 DOI: 10.1038/s41598-018-26302-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Accepted: 05/08/2018] [Indexed: 01/19/2023] Open
Abstract
We investigated the effect of acoustic environmental enrichment (EE) on the lifespans and behaviours of mice to the end of their natural lifespan in different acoustic environments. Acoustic EE induced a significantly prolonged natural lifespan (nearly 17% longer) and was associated with increased voluntary movements. However, no correlation between lifespan and voluntary movements was detected, suggesting that increased voluntary movements are not a primary cause of lifespan prolongation. Analyses of individual differences in lifespan demonstrated that lifespan extension induced by acoustic EE could be related to changes in social relationships (e.g., reduction of social conflict) among individuals kept within a cage. Therefore, an acoustic component may be an important factor inducing the positive effects of EE.
Collapse
|
37
|
Kujala UM. Is physical activity a cause of longevity? It is not as straightforward as some would believe. A critical analysis. Br J Sports Med 2018; 52:914-918. [PMID: 29545237 DOI: 10.1136/bjsports-2017-098639] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/13/2018] [Indexed: 11/04/2022]
Abstract
There are discrepant findings between (A) observational follow-ups and (B) interventional studies that investigate possible causal association between high physical activity and low mortality. Participation in vigorous physical activity at a specific time-point is an indicator of good fitness and health, and is associated with a reduced risk of death. However, neither randomised controlled trials nor experimental animal studies have provided conclusive evidence to show that physical activity started during adulthood extends lifespan. Consequently, the undisputed health-related benefits of exercise have yet to translate into any proven causal relationship with longevity. Physical activity improves fitness and physical function, and confers other health-related effects. These outcomes have a greater basis in evidence-based data than any claims of a reduced risk of death, especially when recommending physical activity for previously physically inactive middle-aged and elderly adults.
Collapse
Affiliation(s)
- Urho M Kujala
- Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
| |
Collapse
|
38
|
Seldeen KL, Lasky G, Leiker MM, Pang M, Personius KE, Troen BR. High Intensity Interval Training Improves Physical Performance and Frailty in Aged Mice. J Gerontol A Biol Sci Med Sci 2018; 73:429-437. [PMID: 28633487 DOI: 10.1093/gerona/glx120] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 06/16/2017] [Indexed: 10/08/2023] Open
Abstract
Sarcopenia and frailty are highly prevalent in older individuals, increasing the risk of disability and loss of independence. High intensity interval training (HIIT) may provide a robust intervention for both sarcopenia and frailty by achieving both strength and endurance benefits with lower time commitments than other exercise regimens. To better understand the impacts of HIIT during aging, we compared 24-month-old C57BL/6J sedentary mice with those that were administered 10-minute uphill treadmill HIIT sessions three times per week over 16 weeks. Baseline and end point assessments included body composition, physical performance, and frailty based on criteria from the Fried physical frailty scale. HIIT-trained mice demonstrated dramatic improvement in grip strength (HIIT 10.9% vs -3.9% in sedentary mice), treadmill endurance (32.6% vs -2.0%), and gait speed (107.0% vs 39.0%). Muscles from HIIT mice also exhibited greater mass, larger fiber size, and an increase in mitochondrial biomass. Furthermore, HIIT exercise led to a dramatic reduction in frailty scores in five of six mice that were frail or prefrail at baseline, with four ultimately becoming nonfrail. The uphill treadmill HIIT exercise sessions were well tolerated by aged mice and led to performance gains, improvement in underlying muscle physiology, and reduction in frailty.
Collapse
Affiliation(s)
- Kenneth Ladd Seldeen
- Division of Geriatrics and Palliative Medicine, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo and Research Service, Veterans Affairs Western New York Healthcare System
| | - Ginger Lasky
- Division of Geriatrics and Palliative Medicine, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo and Research Service, Veterans Affairs Western New York Healthcare System
| | - Merced Marie Leiker
- Division of Geriatrics and Palliative Medicine, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo and Research Service, Veterans Affairs Western New York Healthcare System
| | - Manhui Pang
- Division of Geriatrics and Palliative Medicine, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo and Research Service, Veterans Affairs Western New York Healthcare System
| | - Kirkwood Ely Personius
- Department of Rehabilitation Science, School of Public Health and Health Professionals, University at Buffalo, New York
| | - Bruce Robert Troen
- Division of Geriatrics and Palliative Medicine, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo and Research Service, Veterans Affairs Western New York Healthcare System
| |
Collapse
|
39
|
Metabolic shift from glycogen to trehalose promotes lifespan and healthspan in Caenorhabditis elegans. Proc Natl Acad Sci U S A 2018; 115:E2791-E2800. [PMID: 29511104 DOI: 10.1073/pnas.1714178115] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
As Western diets continue to include an ever-increasing amount of sugar, there has been a rise in obesity and type 2 diabetes. To avoid metabolic diseases, the body must maintain proper metabolism, even on a high-sugar diet. In both humans and Caenorhabditis elegans, excess sugar (glucose) is stored as glycogen. Here, we find that animals increased stored glycogen as they aged, whereas even young adult animals had increased stored glycogen on a high-sugar diet. Decreasing the amount of glycogen storage by modulating the C. elegans glycogen synthase, gsy-1, a key enzyme in glycogen synthesis, can extend lifespan, prolong healthspan, and limit the detrimental effects of a high-sugar diet. Importantly, limiting glycogen storage leads to a metabolic shift whereby glucose is now stored as trehalose. Two additional means to increase trehalose show similar longevity extension. Increased trehalose is entirely dependent on a functional FOXO transcription factor DAF-16 and autophagy to promote lifespan and healthspan extension. Our results reveal that when glucose is stored as glycogen, it is detrimental, whereas, when stored as trehalose, animals live a longer, healthier life if DAF-16 is functional. Taken together, these results demonstrate that trehalose modulation may be an avenue for combatting high-sugar-diet pathology.
Collapse
|
40
|
Gomez-Cabrera MC, Garcia-Valles R, Rodriguez-Mañas L, Garcia-Garcia FJ, Olaso-Gonzalez G, Salvador-Pascual A, Tarazona-Santabalbina FJ, Viña J. A New Frailty Score for Experimental Animals Based on the Clinical Phenotype: Inactivity as a Model of Frailty. J Gerontol A Biol Sci Med Sci 2017; 72:885-891. [PMID: 28329258 DOI: 10.1093/gerona/glw337] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Accepted: 12/29/2016] [Indexed: 01/01/2023] Open
Abstract
The development of animal models to study human frailty is important to test interventions to be translated to the clinical practice. The aim of this work was to develop a score for frailty in experimental animals based in the human frailty phenotype. We also tested the effect of physical inactivity in the development of frailty as determined by our score. Male C57Bl/6J mice, individually caged, were randomly assigned to one of two groups: sedentary (inactive) or spontaneous wheel-runners. We compared the sedentary versus the active lifestyle in terms of frailty by evaluating the clinical criteria used in humans: unintentional weight loss; poor endurance (running time); slowness (running speed); weakness (grip strength), and low activity level (motor coordination) at five different ages: 17, 20, 23, 26 and 28 months of age. Each criterion had a designated cut-off point to identify the mice with the lowest performance. Lifelong spontaneous exercise significantly retards frailty. On the contrary sedentary animals become frail as they age. Thus, physical inactivity is a model of frailty in experimental animals. Our frailty score provides a tool to evaluate interventions in mice prior to translating them to clinical practice.
Collapse
Affiliation(s)
- Mari Carmen Gomez-Cabrera
- Department of Physiology, University of Valencia, Fundación Investigación Hospital Clínico Universitario/INCLIVA, Spain
| | - Rebeca Garcia-Valles
- Department of Physiology, University of Valencia, Fundación Investigación Hospital Clínico Universitario/INCLIVA, Spain
| | - Leocadio Rodriguez-Mañas
- Servicio de Geriatría, Hospital Universitario de Getafe, Ministerio de Sanidad y Consumo, Madrid, Spain. Red Temática de Investigación Cooperativa en Envejecimiento y Fragilidad (RETICEF), Instituto de Salud Carlos III
| | | | - Gloria Olaso-Gonzalez
- Department of Physiology, University of Valencia, Fundación Investigación Hospital Clínico Universitario/INCLIVA, Spain
| | - Andrea Salvador-Pascual
- Department of Physiology, University of Valencia, Fundación Investigación Hospital Clínico Universitario/INCLIVA, Spain
| | - Francisco Jose Tarazona-Santabalbina
- Department of Geriatric Medicine, Hospital Universitario de la Ribera, Alzira, Spain.,Faculty of Nursing and Medicine, Catholic University of Valencia San Vicente Mártir, Spain
| | - Jose Viña
- Department of Physiology, University of Valencia, Fundación Investigación Hospital Clínico Universitario/INCLIVA, Spain
| |
Collapse
|
41
|
Tyml K, Swarbreck S, Pape C, Secor D, Koropatnick J, Feng Q, Veldhuizen RAW, Gill SE. Voluntary running exercise protects against sepsis-induced early inflammatory and pro-coagulant responses in aged mice. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2017; 21:210. [PMID: 28789683 PMCID: PMC5549433 DOI: 10.1186/s13054-017-1783-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 06/29/2017] [Indexed: 01/10/2023]
Abstract
Background Despite many animal studies and clinical trials, mortality in sepsis remains high. This may be due to the fact that most experimental studies of sepsis employ young animals, whereas the majority of septic patients are elderly (60 − 70 years). The objective of the present study was to examine the sepsis-induced inflammatory and pro-coagulant responses in aged mice. Since running exercise protects against a variety of diseases, we also examined the effect of voluntary running on septic responses in aged mice. Methods Male C57BL/6 mice were housed in our institute from 2–3 to 22 months (an age mimicking that of the elderly). Mice were prevented from becoming obese by food restriction (given 70–90% of ad libitum consumption amount). Between 20 and 22 months, a subgroup of mice ran voluntarily on wheels, alternating 1–3 days of running with 1–2 days of rest. At 22 months, mice were intraperitoneally injected with sterile saline (control) or 3.75 g/kg fecal slurry (septic). At 7 h post injection, we examined (1) neutrophil influx in the lung and liver by measuring myeloperoxidase and/or neutrophil elastase in the tissue homogenates by spectrophotometry, (2) interleukin 6 (IL6) and KC in the lung lavage by ELISA, (3) pulmonary surfactant function by measuring percentage of large aggregates, (4) capillary plugging (pro-coagulant response) in skeletal muscle by intravital microscopy, (5) endothelial nitric oxide synthase (eNOS) protein in skeletal muscle (eNOS-derived NO is putative inhibitor of capillary plugging) by immunoblotting, and (6) systemic blood platelet counts by hemocytometry. Results Sepsis caused high levels of pulmonary myeloperoxidase, elastase, IL6, KC, liver myeloperoxidase, and capillary plugging. Sepsis also caused low levels of surfactant function and platelet counts. Running exercise increased eNOS protein and attenuated the septic responses. Conclusions Voluntary running protects against exacerbated sepsis-induced inflammatory and pro-coagulant responses in aged mice. Protection against pro-coagulant responses may involve eNOS upregulation. The present discovery in aged mice calls for clinical investigation into potential beneficial effects of exercise on septic outcomes in the elderly. Electronic supplementary material The online version of this article (doi:10.1186/s13054-017-1783-1) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Karel Tyml
- Centre for Critical Illness Research, London, Ontario, Canada.,Department of Medical Biophysics, University of Western Ontario, London, Ontario, Canada
| | - Scott Swarbreck
- Centre for Critical Illness Research, London, Ontario, Canada
| | - Cynthia Pape
- Centre for Critical Illness Research, London, Ontario, Canada.,Department of Medicine, University of Western Ontario, London, Ontario, Canada
| | - Dan Secor
- Centre for Critical Illness Research, London, Ontario, Canada
| | - James Koropatnick
- Cancer Research Program, Lawson Health Research Institute, London, Ontario, Canada.,Department of Physiology and Pharmacology, University of Western Ontario, London, Ontario, Canada.,Department of Oncology, University of Western Ontario, London, Ontario, Canada.,Department of Pathology, University of Western Ontario, London, Ontario, Canada
| | - Qingping Feng
- Centre for Critical Illness Research, London, Ontario, Canada.,Department of Physiology and Pharmacology, University of Western Ontario, London, Ontario, Canada
| | - Ruud A W Veldhuizen
- Centre for Critical Illness Research, London, Ontario, Canada.,Division of Respirology, University of Western Ontario, London, Ontario, Canada.,Department of Medicine, University of Western Ontario, London, Ontario, Canada.,Department of Physiology and Pharmacology, University of Western Ontario, London, Ontario, Canada
| | - Sean E Gill
- Centre for Critical Illness Research, London, Ontario, Canada. .,Division of Respirology, University of Western Ontario, London, Ontario, Canada. .,Department of Medicine, University of Western Ontario, London, Ontario, Canada. .,Department of Physiology and Pharmacology, University of Western Ontario, London, Ontario, Canada.
| |
Collapse
|
42
|
Horowitz AM, Villeda SA. Therapeutic potential of systemic brain rejuvenation strategies for neurodegenerative disease. F1000Res 2017; 6:1291. [PMID: 28815019 PMCID: PMC5539850 DOI: 10.12688/f1000research.11437.1] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/26/2017] [Indexed: 12/18/2022] Open
Abstract
Neurodegenerative diseases are a devastating group of conditions that cause progressive loss of neuronal integrity, affecting cognitive and motor functioning in an ever-increasing number of older individuals. Attempts to slow neurodegenerative disease advancement have met with little success in the clinic; however, a new therapeutic approach may stem from classic interventions, such as caloric restriction, exercise, and parabiosis. For decades, researchers have reported that these systemic-level manipulations can promote major functional changes that extend organismal lifespan and healthspan. Only recently, however, have the functional effects of these interventions on the brain begun to be appreciated at a molecular and cellular level. The potential to counteract the effects of aging in the brain, in effect rejuvenating the aged brain, could offer broad therapeutic potential to combat dementia-related neurodegenerative disease in the elderly. In particular, results from heterochronic parabiosis and young plasma administration studies indicate that pro-aging and rejuvenating factors exist in the circulation that can independently promote or reverse age-related phenotypes. The recent demonstration that human umbilical cord blood similarly functions to rejuvenate the aged brain further advances this work to clinical translation. In this review, we focus on these blood-based rejuvenation strategies and their capacity to delay age-related molecular and functional decline in the aging brain. We discuss new findings that extend the beneficial effects of young blood to neurodegenerative disease models. Lastly, we explore the translational potential of blood-based interventions, highlighting current clinical trials aimed at addressing therapeutic applications for the treatment of dementia-related neurodegenerative disease in humans.
Collapse
Affiliation(s)
- Alana M. Horowitz
- Biomedical Sciences Graduate Program, University of California San Francisco, San Francisco, California, 94143, USA
- Department of Anatomy, University of California San Francisco, San Francisco, California, 94143, USA
| | - Saul A. Villeda
- Biomedical Sciences Graduate Program, University of California San Francisco, San Francisco, California, 94143, USA
- Department of Anatomy, University of California San Francisco, San Francisco, California, 94143, USA
- The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California San Francisco, San Francisco, California, 94143, USA
| |
Collapse
|
43
|
Impact of Aging and Exercise on Mitochondrial Quality Control in Skeletal Muscle. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:3165396. [PMID: 28656072 PMCID: PMC5471566 DOI: 10.1155/2017/3165396] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Accepted: 05/03/2017] [Indexed: 12/17/2022]
Abstract
Mitochondria are characterized by its pivotal roles in managing energy production, reactive oxygen species, and calcium, whose aging-related structural and functional deteriorations are observed in aging muscle. Although it is still unclear how aging alters mitochondrial quality and quantity in skeletal muscle, dysregulation of mitochondrial biogenesis and dynamic controls has been suggested as key players for that. In this paper, we summarize current understandings on how aging regulates muscle mitochondrial biogenesis, while focusing on transcriptional regulations including PGC-1α, AMPK, p53, mtDNA, and Tfam. Further, we review current findings on the muscle mitochondrial dynamic systems in aging muscle: fusion/fission, autophagy/mitophagy, and protein import. Next, we also discuss how endurance and resistance exercises impact on the mitochondrial quality controls in aging muscle, suggesting possible effective exercise strategies to improve/maintain mitochondrial health.
Collapse
|
44
|
Sponton AC, Silva FH, Araujo HN, Valgas da Silva CP, de Moraes C, Antunes E, Zanesco A, Delbin MA. Circulating Concentrations of Adipocytokines and Their Receptors in the Isolated Corpus Cavernosum and Femoral Artery from Trained Rats on a High-Fat Diet. J Vasc Res 2017; 54:33-50. [DOI: 10.1159/000457800] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 01/21/2017] [Indexed: 12/14/2022] Open
|
45
|
Niel R, Ayachi M, Mille-Hamard L, Le Moyec L, Savarin P, Clement MJ, Besse S, Launay T, Billat VL, Momken I. A new model of short acceleration-based training improves exercise performance in old mice. Scand J Med Sci Sports 2016; 27:1576-1587. [PMID: 28000342 DOI: 10.1111/sms.12809] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/31/2016] [Indexed: 12/14/2022]
Abstract
In order to identify a more appealing exercise strategy for the elderly, we studied a mouse model to determine whether a less time-consuming training program would improve exercise performance, enzyme activities, mitochondrial respiration, and metabolomic parameters. We compared the effects of short-session (acceleration-based) training with those of long-session endurance training in 23-month-old mice. The short-session training consisted of five acceleration-based treadmill running sessions over 2 weeks (the acceleration group), whereas the endurance training consisted of five-one-hour treadmill sessions per week for 4 weeks (the endurance group). A control group of mice was also studied. In the acceleration group, the post-training maximum running speed and time to exhaustion were significantly improved, relative to pretraining values (+8% for speed, P<.05; +10% for time to exhaustion, P<.01). The post-training maximum running speed was higher in the acceleration group than in the endurance group (by 23%; P<.001) and in the control group (by 15%; P<.05). In skeletal muscle samples, the enzymatic activities of citrate synthase, lactate dehydrogenase, and creatine kinase were significantly higher in the acceleration group than in the endurance group. Furthermore, mitochondrial respiratory activity in the gastrocnemius was higher in the acceleration group than in the control group. A metabolomic urine analysis revealed a higher mean taurine concentration and a lower mean branched amino acid concentration in the acceleration group. In old mice, acceleration-based training appears to be an efficient way of increasing performance by improving both aerobic and anaerobic metabolism, and possibly by enhancing antioxidant defenses and maintaining muscle protein balance.
Collapse
Affiliation(s)
- R Niel
- Unité de Biologie Intégrative des Adaptations à l'Exercice (EA7362), Université Evry-Val d'Essonne, Evry, France
| | - M Ayachi
- Unité de Biologie Intégrative des Adaptations à l'Exercice (EA7362), Université Evry-Val d'Essonne, Evry, France
| | - L Mille-Hamard
- Unité de Biologie Intégrative des Adaptations à l'Exercice (EA7362), Université Evry-Val d'Essonne, Evry, France
| | - L Le Moyec
- Unité de Biologie Intégrative des Adaptations à l'Exercice (EA7362), Université Evry-Val d'Essonne, Evry, France
| | - P Savarin
- Laboratoire Chimie, Structures, Propriétés de Biomatériaux et d'Agents Thérapeutiques (CSPBAT), Unité Mixte de Recherche (UMR) 7244, Centre National de Recherche Scientifique (CNRS), Equipe Spectroscopie des Biomolécules et des Milieux Biologiques (SBMB), Université Paris 13, Bobigny, France
| | - M-J Clement
- Laboratoire Structure-Activité des Biomolécules Normales et Pathologiques, INSERM U1204 and Université Evry-Val d'Essonne, Evry, France
| | - S Besse
- Unité de Biologie Intégrative des Adaptations à l'Exercice (EA7362), Université Evry-Val d'Essonne, Evry, France.,Université Paris Descartes, COMUE Sorbonne Paris Cité, Paris, France
| | - T Launay
- Unité de Biologie Intégrative des Adaptations à l'Exercice (EA7362), Université Evry-Val d'Essonne, Evry, France.,Université Paris Descartes, COMUE Sorbonne Paris Cité, Paris, France
| | - V L Billat
- Unité de Biologie Intégrative des Adaptations à l'Exercice (EA7362), Université Evry-Val d'Essonne, Evry, France
| | - I Momken
- Unité de Biologie Intégrative des Adaptations à l'Exercice (EA7362), Université Evry-Val d'Essonne, Evry, France
| |
Collapse
|
46
|
White Z, Terrill J, White RB, McMahon C, Sheard P, Grounds MD, Shavlakadze T. Voluntary resistance wheel exercise from mid-life prevents sarcopenia and increases markers of mitochondrial function and autophagy in muscles of old male and female C57BL/6J mice. Skelet Muscle 2016; 6:45. [PMID: 27964759 PMCID: PMC5155391 DOI: 10.1186/s13395-016-0117-3] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 12/01/2016] [Indexed: 12/22/2022] Open
Abstract
Background There is much interest in the capacity of resistance exercise to prevent the age-related loss of skeletal muscle mass and function, known as sarcopenia. This study investigates the molecular basis underlying the benefits of resistance exercise in aging C57BL/6J mice of both sexes. Results This study is the first to demonstrate that long-term (34 weeks) voluntary resistance wheel exercise (RWE) initiated at middle age, from 15 months, prevents sarcopenia in selected hindlimb muscles and causes hypertrophy in soleus, by 23 months of age in both male and female C57BL/6J mice. Compared with 23-month-old sedentary (SED) controls, RWE (0–6 g of resistance) increased intramuscular mitochondrial density and oxidative capacity (measured by citrate synthase and NADH-TR) and increased LC3II/I ratios (a marker of autophagy) in exercised mice of both sexes. RWE also reduced mRNA expression of Gadd45α (males only) and Runx1 (females only) but had no effect on other markers of denervation including Chrng, Chrnd, Musk, and Myog. RWE increased heart mass in all mice, with a more pronounced increase in females. Significant sex differences were also noted among SED mice, with Murf1 mRNA levels increasing in male, but decreasing in old female mice between 15 and 23 months. Conclusions Overall, long-term RWE initiated from 15 month of age significantly improved some markers of the mitochondrial and autophagosomal pathways and prevented age-related muscle wasting. Electronic supplementary material The online version of this article (doi:10.1186/s13395-016-0117-3) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Zoe White
- School of Anatomy, Physiology and Human Biology, The University of Western Australia (UWA), 35 Stirling Highway, Crawley, WA, 6009, Australia.,Centre for Cell Therapy and Regenerative Medicine, School of Medicine and Pharmacology, UWA and Harry Perkins Institute of Medical Research, Crawley, 6009, WA, Australia
| | - Jessica Terrill
- School of Anatomy, Physiology and Human Biology, The University of Western Australia (UWA), 35 Stirling Highway, Crawley, WA, 6009, Australia.,School of Chemistry and Biochemistry, UWA, Crawley, 6009, WA, Australia
| | - Robert B White
- School of Anatomy, Physiology and Human Biology, The University of Western Australia (UWA), 35 Stirling Highway, Crawley, WA, 6009, Australia
| | | | - Phillip Sheard
- Department of Physiology, University of Otago, Dunedin, 9010, New Zealand
| | - Miranda D Grounds
- School of Anatomy, Physiology and Human Biology, The University of Western Australia (UWA), 35 Stirling Highway, Crawley, WA, 6009, Australia.
| | - Tea Shavlakadze
- School of Anatomy, Physiology and Human Biology, The University of Western Australia (UWA), 35 Stirling Highway, Crawley, WA, 6009, Australia
| |
Collapse
|
47
|
McMullan RC, Kelly SA, Hua K, Buckley BK, Faber JE, Pardo-Manuel de Villena F, Pomp D. Long-term exercise in mice has sex-dependent benefits on body composition and metabolism during aging. Physiol Rep 2016; 4:4/21/e13011. [PMID: 27905293 PMCID: PMC5112492 DOI: 10.14814/phy2.13011] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2016] [Accepted: 09/22/2016] [Indexed: 12/19/2022] Open
Abstract
Aging is associated with declining exercise and unhealthy changes in body composition. Exercise ameliorates certain adverse age‐related physiological changes and protects against many chronic diseases. Despite these benefits, willingness to exercise and physiological responses to exercise vary widely, and long‐term exercise and its benefits are difficult and costly to measure in humans. Furthermore, physiological effects of aging in humans are confounded with changes in lifestyle and environment. We used C57BL/6J mice to examine long‐term patterns of exercise during aging and its physiological effects in a well‐controlled environment. One‐year‐old male (n = 30) and female (n = 30) mice were divided into equal size cohorts and aged for an additional year. One cohort was given access to voluntary running wheels while another was denied exercise other than home cage movement. Body mass, composition, and metabolic traits were measured before, throughout, and after 1 year of treatment. Long‐term exercise significantly prevented gains in body mass and body fat, while preventing loss of lean mass. We observed sex‐dependent differences in body mass and composition trajectories during aging. Wheel running (distance, speed, duration) was greater in females than males and declined with age. We conclude that long‐term exercise may serve as a preventive measure against age‐related weight gain and body composition changes, and that mouse inbred strains can be used to characterize effects of long‐term exercise and factors (e.g. sex, age) modulating these effects. These findings will facilitate studies on relationships between exercise and health in aging populations, including genetic predisposition and genotype‐by‐environment interactions.
Collapse
Affiliation(s)
- Rachel C McMullan
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Scott A Kelly
- Department of Zoology, Ohio Wesleyan University, Delaware, Ohio
| | - Kunjie Hua
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Brian K Buckley
- Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - James E Faber
- Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Fernando Pardo-Manuel de Villena
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.,Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Daniel Pomp
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| |
Collapse
|
48
|
Zhang WB, Sinha DB, Pittman WE, Hvatum E, Stroustrup N, Pincus Z. Extended Twilight among Isogenic C. elegans Causes a Disproportionate Scaling between Lifespan and Health. Cell Syst 2016; 3:333-345.e4. [PMID: 27720632 PMCID: PMC5111811 DOI: 10.1016/j.cels.2016.09.003] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 07/30/2016] [Accepted: 09/08/2016] [Indexed: 12/21/2022]
Abstract
Although many genetic factors and lifestyle interventions are known to affect the mean lifespan of animal populations, the physiological variation displayed by individuals across their lifespans remains largely uncharacterized. Here, we use a custom culture apparatus to continuously monitor five aspects of aging physiology across hundreds of isolated Caenorhabditis elegans individuals kept in a constant environment from hatching until death. Aggregating these measurements into an overall estimate of senescence, we find two chief differences between longer- and shorter-lived individuals. First, though long- and short-lived individuals are physiologically equivalent in early adulthood, longer-lived individuals experience a lower rate of physiological decline throughout life. Second, and counter-intuitively, long-lived individuals have a disproportionately extended "twilight" period of low physiological function. While longer-lived individuals experience more overall days of good health, their proportion of good to bad health, and thus their average quality of life, is systematically lower than that of shorter-lived individuals. We conclude that, within a homogeneous population reared under constant conditions, the period of early-life good health is comparatively uniform, and the most plastic period in the aging process is end-of-life senescence.
Collapse
Affiliation(s)
- William B Zhang
- Department of Genetics, Washington University in St. Louis, St. Louis, MO 63110, USA; Department of Developmental Biology, Washington University in St. Louis, St. Louis, MO 63110, USA
| | - Drew B Sinha
- Department of Genetics, Washington University in St. Louis, St. Louis, MO 63110, USA; Department of Developmental Biology, Washington University in St. Louis, St. Louis, MO 63110, USA; Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - William E Pittman
- Department of Genetics, Washington University in St. Louis, St. Louis, MO 63110, USA; Department of Developmental Biology, Washington University in St. Louis, St. Louis, MO 63110, USA; Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Erik Hvatum
- Department of Genetics, Washington University in St. Louis, St. Louis, MO 63110, USA; Department of Developmental Biology, Washington University in St. Louis, St. Louis, MO 63110, USA
| | - Nicholas Stroustrup
- Department of Systems Biology, Harvard Medical School, Boston, MA 02115, USA
| | - Zachary Pincus
- Department of Genetics, Washington University in St. Louis, St. Louis, MO 63110, USA; Department of Developmental Biology, Washington University in St. Louis, St. Louis, MO 63110, USA.
| |
Collapse
|
49
|
Affiliation(s)
- Benjamin F Miller
- Department of Health and Exercise Science, Colorado State University, Fort Collins, Colorado
| | - Karyn L Hamilton
- Department of Health and Exercise Science, Colorado State University, Fort Collins, Colorado
| |
Collapse
|
50
|
Huffman DM, Schafer MJ, LeBrasseur NK. Energetic interventions for healthspan and resiliency with aging. Exp Gerontol 2016; 86:73-83. [PMID: 27260561 DOI: 10.1016/j.exger.2016.05.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 05/03/2016] [Accepted: 05/24/2016] [Indexed: 12/16/2022]
Abstract
Several behavioral and pharmacological strategies improve longevity, which is indicative of delayed organismal aging, with the most effective interventions extending both life- and healthspan. In free living creatures, maintaining health and function into old age requires resilience against a multitude of stressors. Conversely, in experimental settings, conventional housing of rodents limits exposure to such challenges, thereby obscuring an accurate assessment of resilience. Caloric restriction (CR) and exercise, as well as pharmacologic strategies (resveratrol, rapamycin, metformin, senolytics), are well established to improve indices of health and aging, but some paradoxical effects have been observed on resilience. For instance, CR potently retards the onset of age-related diseases, and improves lifespan to a greater extent than exercise in a variety of models. However, exercise has proven more consistently beneficial to organismal resilience against a broad array of stressors, including infections, surgery, wound healing and frailty. CR can improve cellular stress defenses and protect from frailty, but also impairs the response to infections, bed rest and healing. How an intervention will impact not only longevity, health and function, but also resiliency, is critical to better understanding translational implications. Thus, organismal robustness represents a critical, albeit understudied aspect of aging, which needs more careful attention in order to better inform on how putative age-delaying strategies will impact preservation of health and function in response to stressors with aging in humans.
Collapse
Affiliation(s)
- Derek M Huffman
- Department of Molecular Pharmacology and Medicine, Albert Einstein College of Medicine, Bronx, NY, USA; Institute for Aging Research, Albert Einstein College of Medicine, Bronx, NY, USA.
| | - Marissa J Schafer
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, MN, USA
| | | |
Collapse
|