1
|
Liu M, Lu F, Feng J. Aging and homeostasis of the hypodermis in the age-related deterioration of skin function. Cell Death Dis 2024; 15:443. [PMID: 38914551 PMCID: PMC11196735 DOI: 10.1038/s41419-024-06818-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 02/01/2024] [Accepted: 06/10/2024] [Indexed: 06/26/2024]
Abstract
Adipose tissues in the hypodermis, the crucial stem cell reservoir in the skin and the endocrine organ for the maintenance of skin homeostasis undergo significant changes during skin aging. Dermal white adipose tissue (dWAT) has recently been recognized as an important organ for both non-metabolic and metabolic health in skin regeneration and rejuvenation. Defective differentiation, adipogenesis, improper adipocytokine production, and immunological dissonance dysfunction in dWAT lead to age-associated clinical changes. Here, we review age-related alterations in dWAT across levels, emphasizing the mechanisms underlying the regulation of aging. We also discuss the pathogenic changes involved in age-related fat dysfunction and the unfavorable consequences of accelerated skin aging, such as chronic inflammaging, immunosenescence, delayed wound healing, and fibrosis. Research has shown that adipose aging is an early initiation event and a potential target for extending longevity. We believe that adipose tissues play an essential role in aging and form a potential therapeutic target for the treatment of age-related skin diseases. Further research is needed to improve our understanding of this phenomenon.
Collapse
Affiliation(s)
- Meiqi Liu
- Department of Plastic Surgery, Nanfang Hospital, Southern Medical University, 1838 Guangzhou North Road, Guangzhou, Guangdong, 510515, People's Republic of China
| | - Feng Lu
- Department of Plastic Surgery, Nanfang Hospital, Southern Medical University, 1838 Guangzhou North Road, Guangzhou, Guangdong, 510515, People's Republic of China
| | - Jingwei Feng
- Department of Plastic Surgery, Nanfang Hospital, Southern Medical University, 1838 Guangzhou North Road, Guangzhou, Guangdong, 510515, People's Republic of China.
| |
Collapse
|
2
|
Zhao Y, Yue R. Aging adipose tissue, insulin resistance, and type 2 diabetes. Biogerontology 2024; 25:53-69. [PMID: 37725294 DOI: 10.1007/s10522-023-10067-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Accepted: 08/28/2023] [Indexed: 09/21/2023]
Abstract
With the increase of population aging, the prevalence of type 2 diabetes (T2D) is also rising. Aging affects the tissues and organs of the whole body, which is the result of various physiological and pathological processes. Adipose tissue has a high degree of plasticity and changes with aging. Aging changes the distribution of adipose tissue, affects adipogenesis, browning characteristics, inflammatory status and adipokine secretion, and increases lipotoxicity. These age-dependent changes in adipose tissue are an important cause of insulin resistance and T2D. Understanding adipose tissue changes can help promote healthy aging process. This review summarizes changes in adipose tissue ascribable to aging, with a focus on the role of aging adipose tissue in insulin resistance and T2D.
Collapse
Affiliation(s)
- Yixuan Zhao
- Hospital of Chengdu University of Traditional Chinese Medicine, NO. 39 Shi-Er-Qiao Road, Chengdu, 610072, Sichuan Province, People's Republic of China
| | - Rensong Yue
- Hospital of Chengdu University of Traditional Chinese Medicine, NO. 39 Shi-Er-Qiao Road, Chengdu, 610072, Sichuan Province, People's Republic of China.
| |
Collapse
|
3
|
Aversa Z, White TA, Heeren AA, Hulshizer CA, Saul D, Zhang X, Molina AJA, Redman LM, Martin CK, Racette SB, Huffman KM, Bhapkar M, Khosla S, Das SK, Fielding RA, Atkinson EJ, LeBrasseur NK. Calorie restriction reduces biomarkers of cellular senescence in humans. Aging Cell 2024; 23:e14038. [PMID: 37961856 PMCID: PMC10861196 DOI: 10.1111/acel.14038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 10/19/2023] [Accepted: 10/22/2023] [Indexed: 11/15/2023] Open
Abstract
Calorie restriction (CR) with adequate nutrient intake is a potential geroprotective intervention. To advance this concept in humans, we tested the hypothesis that moderate CR in healthy young-to-middle-aged individuals would reduce circulating biomarkers of cellular senescence, a fundamental mechanism of aging and aging-related conditions. Using plasma specimens from the Comprehensive Assessment of Long-term Effects of Reducing Intake of Energy (CALERIE™) phase 2 study, we found that CR significantly reduced the concentrations of several senescence biomarkers at 12 and 24 months compared to an ad libitum diet. Using machine learning, changes in biomarker concentrations emerged as important predictors of the change in HOMA-IR and insulin sensitivity index at 12 and 24 months, and the change in resting metabolic rate residual at 12 months. Finally, using adipose tissue RNA-sequencing data from a subset of participants, we observed a significant reduction in a senescence-focused gene set in response to CR at both 12 and 24 months compared to baseline. Our results advance the understanding of the effects of CR in humans and further support a link between cellular senescence and metabolic health.
Collapse
Affiliation(s)
- Zaira Aversa
- Robert and Arlene Kogod Center on Aging, Mayo ClinicRochesterMinnesotaUSA
- Department of Physical Medicine and RehabilitationMayo ClinicRochesterMinnesotaUSA
| | - Thomas A. White
- Robert and Arlene Kogod Center on Aging, Mayo ClinicRochesterMinnesotaUSA
| | - Amanda A. Heeren
- Robert and Arlene Kogod Center on Aging, Mayo ClinicRochesterMinnesotaUSA
| | | | - Dominik Saul
- Robert and Arlene Kogod Center on Aging, Mayo ClinicRochesterMinnesotaUSA
- Department of Trauma and Reconstructive SurgeryEberhard Karls University Tübingen, BG Trauma Center TübingenTübingenGermany
| | - Xu Zhang
- Robert and Arlene Kogod Center on Aging, Mayo ClinicRochesterMinnesotaUSA
| | | | | | - Corby K. Martin
- Pennington Biomedical Research CenterBaton RougeLouisianaUSA
| | - Susan B. Racette
- College of Health SolutionsArizona State UniversityPhoenixArizonaUSA
- Program in Physical TherapyWashington University School of MedicineSt. LouisMissouriUSA
| | - Kim M. Huffman
- Duke Clinical Research Institute and Molecular Physiology Institute, School of MedicineDurhamNorth CarolinaUSA
| | - Manjushri Bhapkar
- Duke Clinical Research Institute and Molecular Physiology Institute, School of MedicineDurhamNorth CarolinaUSA
| | - Sundeep Khosla
- Robert and Arlene Kogod Center on Aging, Mayo ClinicRochesterMinnesotaUSA
- Division of EndocrinologyMayo Clinic College of MedicineRochesterMinnesotaUSA
| | - Sai Krupa Das
- Energy Metabolism Team, Jean Mayer USDA Human Nutrition Research Center on AgingTufts UniversityBostonMassachusettsUSA
| | - Roger A. Fielding
- Nutrition, Exercise Physiology and Sarcopenia Laboratory, Jean Mayer USDA Human Nutrition Research Center on AgingTufts UniversityBostonMassachusettsUSA
| | | | - Nathan K. LeBrasseur
- Robert and Arlene Kogod Center on Aging, Mayo ClinicRochesterMinnesotaUSA
- Department of Physical Medicine and RehabilitationMayo ClinicRochesterMinnesotaUSA
- Paul F. Glenn Center for the Biology of Aging at Mayo ClinicRochesterMinnesotaUSA
| |
Collapse
|
4
|
Zhu H, Shen F, Liao T, Qian H, Liu Y. Immunosenescence and macrophages: From basics to therapeutics. Int J Biochem Cell Biol 2023; 165:106479. [PMID: 37866656 DOI: 10.1016/j.biocel.2023.106479] [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: 06/28/2023] [Revised: 10/06/2023] [Accepted: 10/18/2023] [Indexed: 10/24/2023]
Abstract
Ageing decreases the function of the immune system and increases susceptibility to some chronic, infectious, and autoimmune diseases. Senescence cells, which produce senescence-associated secretory phenotypes (SASPs), can activate the innate and adaptive immune responses. Macrophages are among the most abundant innate immune cell types in senescent microenvironments. Senescence-associated macrophages, recruited by SASPs, play a vital role in establishing the essential microenvironments for maintaining tissue homeostasis. However, it's important to note that these senescence-associated macrophages can also influence senescent processes, either by enhancing or impeding the functions of tissue-resident senescent cells. In this discussion, we describe the potential targets of immunosenescence and shed light on the probable mechanisms by which macrophages influence cellular senescence. Furthermore, we analyze their dual function in both clearing senescent cells and modulating age-related diseases. This multifaceted influence operates through processes including heightened inflammation, phagocytosis, efferocytosis, and autophagy. Given the potential off-target effects and immune evasion mechanisms associated with traditional anti-ageing strategies (senolytics and senomorphics), 'resetting' immune system tolerance or targeting senescence-related macrophage functions (i.e., phagocytotic capacity and immunosurveillance) will inform treatment of age-related diseases. Therefore, we review recent advances in the use of macrophage therapeutics to treat ageing and age-associated disorders, and outline the key gaps in this field.
Collapse
Affiliation(s)
- Hongkang Zhu
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, China
| | | | - Tingting Liao
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, China
| | - He Qian
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, China.
| | - Yu Liu
- Wuxi 9th People's Hospital Affiliated to Soochow University, Wuxi 214062, China.
| |
Collapse
|
5
|
Diaz-Ruiz A, Price NL, Ferrucci L, de Cabo R. Obesity and lifespan, a complex tango. Sci Transl Med 2023; 15:eadh1175. [PMID: 37992154 DOI: 10.1126/scitranslmed.adh1175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2023]
Abstract
Obesity and aging share comorbidities, phenotypes, and deleterious effects on health that are associated with chronic diseases. However, distinct features set them apart, with underlying biology that should be explored and exploited, especially given the demographic shifts and the obesity epidemic that the world is facing.
Collapse
Affiliation(s)
- Alberto Diaz-Ruiz
- Translational Gerontology Branch, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, USA
- Laboratory of Cellular and Molecular Gerontology, Precision Nutrition and Aging, IMDEA Food, CEI UAM + CSIC, 028049 Madrid, Spain
- CIBER Physiopathology of Obesity and Nutrition (CIBERobn), E28029 Madrid, Spain
| | - Nathan L Price
- Translational Gerontology Branch, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, USA
| | - Luigi Ferrucci
- Translational Gerontology Branch, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, USA
| | - Rafael de Cabo
- Translational Gerontology Branch, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, USA
- Group of Nutritional Interventions, Precision Nutrition and Aging, IMDEA Food, CEI UAM+CSIC, E28049 Madrid, Spain
| |
Collapse
|
6
|
Xie K, Ehninger D. Ageing-associated phenotypes in mice. Mech Ageing Dev 2023; 214:111852. [PMID: 37454704 DOI: 10.1016/j.mad.2023.111852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 06/22/2023] [Accepted: 07/10/2023] [Indexed: 07/18/2023]
Abstract
Ageing is a continuous process in life featuring progressive damage accumulation that leads to physiological decline, functional deterioration and ultimately death of an organism. Based on the relatively close anatomical and physiological similarity to humans, the mouse has been proven as a valuable model organism in ageing research over the last decades. In this review, we survey methods and tools currently in use to assess ageing phenotypes in mice. We summarize a range of ageing-associated alterations detectable at two major levels of analysis: (1) physiology and pathophysiology and (2) molecular biomarkers. Age-sensitive phenotypes provided in this article may serve to inform future studies targeting various aspects of organismal ageing in mice. In addition, we discuss conceptual and technical challenges faced by previous ageing studies in mice and, where possible, provide recommendations on how to resolve some of these issues.
Collapse
Affiliation(s)
- Kan Xie
- Translational Biogerontology Lab, German Center for Neurodegenerative Diseases (DZNE), Venusberg-Campus 1/99, 53127 Bonn, Germany
| | - Dan Ehninger
- Translational Biogerontology Lab, German Center for Neurodegenerative Diseases (DZNE), Venusberg-Campus 1/99, 53127 Bonn, Germany.
| |
Collapse
|
7
|
Tarantini S, Subramanian M, Butcher JT, Yabluchanskiy A, Li X, Miller RA, Balasubramanian P. Revisiting adipose thermogenesis for delaying aging and age-related diseases: Opportunities and challenges. Ageing Res Rev 2023; 87:101912. [PMID: 36924940 PMCID: PMC10164698 DOI: 10.1016/j.arr.2023.101912] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 03/03/2023] [Accepted: 03/13/2023] [Indexed: 03/17/2023]
Abstract
Adipose tissue undergoes significant changes in structure, composition, and function with age including altered adipokine secretion, decreased adipogenesis, altered immune cell profile and increased inflammation. Considering the role of adipose tissue in whole-body energy homeostasis, age-related dysfunction in adipose metabolism could potentially contribute to an increased risk for metabolic diseases and accelerate the onset of other age-related diseases. Increasing cellular energy expenditure in adipose tissue, also referred to as thermogenesis, has emerged as a promising strategy to improve adipose metabolism and treat obesity-related metabolic disorders. However, translating this strategy to the aged population comes with several challenges such as decreased thermogenic response and the paucity of safe pharmacological agents to activate thermogenesis. This mini-review aims to discuss the current body of knowledge on aging and thermogenesis and highlight the unexplored opportunities (cellular mechanisms and secreted factors) to target thermogenic mechanisms for delaying aging and age-related diseases. Finally, we also discuss the emerging role of thermogenic adipocytes in healthspan and lifespan extension.
Collapse
Affiliation(s)
- Stefano Tarantini
- Vascular Cognitive Impairment, Neurodegeneration and Healthy Brain Aging Program, Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA; Oklahoma Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA; Department of Health Promotion Sciences, College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA; The Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Madhan Subramanian
- Department of Physiological Sciences, College of Veterinary Medicine, Oklahoma State University, Stillwater, OK, USA
| | - Joshua T Butcher
- Department of Physiological Sciences, College of Veterinary Medicine, Oklahoma State University, Stillwater, OK, USA
| | - Andriy Yabluchanskiy
- Vascular Cognitive Impairment, Neurodegeneration and Healthy Brain Aging Program, Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA; Oklahoma Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA; Department of Health Promotion Sciences, College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA; The Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Xinna Li
- Department of Pathology and Geriatrics Center, University of Michigan, Ann Arbor, MI, USA
| | - Richard A Miller
- Department of Pathology and Geriatrics Center, University of Michigan, Ann Arbor, MI, USA
| | - Priya Balasubramanian
- Vascular Cognitive Impairment, Neurodegeneration and Healthy Brain Aging Program, Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA; Oklahoma Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA; The Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA.
| |
Collapse
|
8
|
Zhang YX, Ou MY, Yang ZH, Sun Y, Li QF, Zhou SB. Adipose tissue aging is regulated by an altered immune system. Front Immunol 2023; 14:1125395. [PMID: 36875140 PMCID: PMC9981968 DOI: 10.3389/fimmu.2023.1125395] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 01/30/2023] [Indexed: 02/19/2023] Open
Abstract
Adipose tissue is a widely distributed organ that plays a critical role in age-related physiological dysfunctions as an important source of chronic sterile low-grade inflammation. Adipose tissue undergoes diverse changes during aging, including fat depot redistribution, brown and beige fat decrease, functional decline of adipose progenitor and stem cells, senescent cell accumulation, and immune cell dysregulation. Specifically, inflammaging is common in aged adipose tissue. Adipose tissue inflammaging reduces adipose plasticity and pathologically contributes to adipocyte hypertrophy, fibrosis, and ultimately, adipose tissue dysfunction. Adipose tissue inflammaging also contributes to age-related diseases, such as diabetes, cardiovascular disease and cancer. There is an increased infiltration of immune cells into adipose tissue, and these infiltrating immune cells secrete proinflammatory cytokines and chemokines. Several important molecular and signaling pathways mediate the process, including JAK/STAT, NFκB and JNK, etc. The roles of immune cells in aging adipose tissue are complex, and the underlying mechanisms remain largely unclear. In this review, we summarize the consequences and causes of inflammaging in adipose tissue. We further outline the cellular/molecular mechanisms of adipose tissue inflammaging and propose potential therapeutic targets to alleviate age-related problems.
Collapse
Affiliation(s)
- Yi-Xiang Zhang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Min-Yi Ou
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zi-Han Yang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yu Sun
- Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Qing-Feng Li
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shuang-Bai Zhou
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| |
Collapse
|
9
|
Tian Y, Liu X, Pei X, Gao H, Pan P, Yang Y. Mechanism of Mitochondrial Homeostasis Controlling Ovarian Physiology. Endocrinology 2022; 164:6828017. [PMID: 36378567 DOI: 10.1210/endocr/bqac189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Indexed: 11/17/2022]
Abstract
Ovarian cells, including oocytes, granulosa/cumulus cells, theca cells, and stromal cells, contain abundant mitochondria, which play indispensable roles in the processes of ovarian follicle development. Ovarian function is closely controlled by mitochondrial proteostasis and mitostasis. While mitochondrial proteostasis and mitostasis are disturbed by several factors, leading to dysfunction of ovarian function and initiating the mitochondrial unfolded protein response (UPRmt) and mitophagy to maintain or recover ovarian function and mitochondrial function, clear interactions between the 2 pathways in the ovary have not been fully elucidated. Here, we comprehensively summarize the molecular networks or regulatory mechanisms behind further mitochondrial research in the ovary. This review provides novel insights into the interactions between the UPRmt and mitophagy in ovarian functions.
Collapse
Affiliation(s)
- Yuan Tian
- Clinical Medical College, Key Laboratory of Fertility Preservation and Maintenance of Ministry of Education, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan 750004, China
| | - Xinrui Liu
- Clinical Medical College, Key Laboratory of Fertility Preservation and Maintenance of Ministry of Education, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan 750004, China
| | - Xiuying Pei
- Clinical Medical College, Key Laboratory of Fertility Preservation and Maintenance of Ministry of Education, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan 750004, China
| | - Hui Gao
- Clinical Medical College, Key Laboratory of Fertility Preservation and Maintenance of Ministry of Education, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan 750004, China
| | - Pengge Pan
- Clinical Medical College, Key Laboratory of Fertility Preservation and Maintenance of Ministry of Education, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan 750004, China
| | - Yanzhou Yang
- Clinical Medical College, Key Laboratory of Fertility Preservation and Maintenance of Ministry of Education, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan 750004, China
| |
Collapse
|
10
|
Wink L, Miller RA, Garcia GG. Rapamycin, Acarbose and 17α-estradiol share common mechanisms regulating the MAPK pathways involved in intracellular signaling and inflammation. Immun Ageing 2022; 19:8. [PMID: 35105357 PMCID: PMC8805398 DOI: 10.1186/s12979-022-00264-1] [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: 11/08/2021] [Accepted: 01/19/2022] [Indexed: 01/24/2023]
Abstract
BACKGROUND Rapamycin (Rapa), acarbose (ACA), and 17α-estradiol (17aE2, males only) have health benefits that increase lifespan of mice. Little is known about how these three agents alter the network of pathways downstream of insulin/IGF1 signals as well as inflammatory/stress responses. RESULTS ACA, Rapa, and 17aE2 (in males, but not in females) oppose age-related increases in the MEK1- ERK1/2-MNK1/2 cascade, and thus reduce phosphorylation of eIF4E, a key component of cap-dependent translation. In parallel, these treatments (in both sexes) reduce age-related increases in the MEK3-p38MAPK-MK2 pathway, to decrease levels of the acute phase response proteins involved in inflammation. CONCLUSION Each of three drugs converges on the regulation of both the ERK1/2 signaling pathway and the p38-MAPK pathway. The changes induced by treatments in ERK1/2 signaling are seen in both sexes, but the 17aE2 effects are male-specific, consistent with the effects on lifespan. However, the inhibition of age-dependent p38MAPK pathways and acute phase responses is triggered in both sexes by all three drugs, suggesting new approaches to prevention or reversal of age-related inflammatory changes in a clinical setting independent of lifespan effects.
Collapse
Affiliation(s)
- Lily Wink
- grid.214458.e0000000086837370Department of Chemistry, University of Michigan College of Literature Science and The Arts, Ann Arbor, USA
| | - Richard A. Miller
- grid.214458.e0000000086837370Department of Pathology, University of Michigan School of Medicine, Ann Arbor, USA ,grid.214458.e0000000086837370University of Michigan Geriatrics Center, Room 3005 BSRB, Box 2200, 109 Zina Pitcher Place, Ann Arbor, MI 48109-2200 USA
| | - Gonzalo G. Garcia
- grid.214458.e0000000086837370Department of Pathology, University of Michigan School of Medicine, Ann Arbor, USA
| |
Collapse
|
11
|
Wu B, Yan J, Yang J, Xia Y, Li D, Zhang F, Cao H. Extension of the Life Span by Acarbose: Is It Mediated by the Gut Microbiota? Aging Dis 2022; 13:1005-1014. [PMID: 35855337 PMCID: PMC9286917 DOI: 10.14336/ad.2022.0117] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 01/17/2022] [Indexed: 11/17/2022] Open
Abstract
Acarbose can extend the life span of mice through a process involving the gut microbiota. Several factors affect the life span, including mitochondrial function, cellular senescence, telomere length, immune function, and expression of longevity-related genes. In this review, the effects of acarbose-regulated gut microbiota on the life span-influencing factors have been discussed. In addition, a novel theoretical basis for improving our understanding of the mechanisms by which acarbose extends the life span of mice has been suggested.
Collapse
Affiliation(s)
- Baiyun Wu
- Nutritional Department, Affiliated Hospital of Jiangnan University, Wuxi, China.
- School of Medicine, Nantong University, Nantong, China.
| | - Jiai Yan
- Nutritional Department, Affiliated Hospital of Jiangnan University, Wuxi, China.
- Clinical Assessment Center of Functional Food, Affiliated Hospital of Jiangnan University, Wuxi, China.
| | - Ju Yang
- Nutritional Department, Affiliated Hospital of Jiangnan University, Wuxi, China.
- Clinical Assessment Center of Functional Food, Affiliated Hospital of Jiangnan University, Wuxi, China.
| | - Yanping Xia
- Nutritional Department, Affiliated Hospital of Jiangnan University, Wuxi, China.
- Clinical Assessment Center of Functional Food, Affiliated Hospital of Jiangnan University, Wuxi, China.
| | - Dan Li
- Nutritional Department, Affiliated Hospital of Jiangnan University, Wuxi, China.
- Clinical Assessment Center of Functional Food, Affiliated Hospital of Jiangnan University, Wuxi, China.
| | - Feng Zhang
- Nutritional Department, Affiliated Hospital of Jiangnan University, Wuxi, China.
- Clinical Assessment Center of Functional Food, Affiliated Hospital of Jiangnan University, Wuxi, China.
- Correspondence should be addressed to: Dr. Hong Cao, () and Dr. Feng Zhang (), Nutritional Department, Affiliated Hospital of Jiangnan University, Wuxi, China
| | - Hong Cao
- Nutritional Department, Affiliated Hospital of Jiangnan University, Wuxi, China.
- Clinical Assessment Center of Functional Food, Affiliated Hospital of Jiangnan University, Wuxi, China.
- Department of Endocrinology, Affiliated Hospital of Jiangnan University, Wuxi, China.
- Correspondence should be addressed to: Dr. Hong Cao, () and Dr. Feng Zhang (), Nutritional Department, Affiliated Hospital of Jiangnan University, Wuxi, China
| |
Collapse
|
12
|
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: 203] [Impact Index Per Article: 67.7] [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
|
13
|
Bitto A, Tatom N, Krivak T, Grotz P, Kaeberlein M. Evidence that C/EBP-β LAP Increases Fat Metabolism and Protects Against Diet-Induced Obesity in Response to mTOR Inhibition. FRONTIERS IN AGING 2021; 2:738512. [PMID: 35822052 PMCID: PMC9261321 DOI: 10.3389/fragi.2021.738512] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 09/01/2021] [Indexed: 01/07/2023]
Abstract
Aging and obesity are common risk factors for numerous chronic pathologies, and the compounding effects of old age and increased adiposity pose a serious threat to public health. Starting from the assumption that aging and obesity may have shared underpinnings, we investigated the antiobesogenic potential of a successful longevity intervention, the mTORC1 inhibitor rapamycin. We find that rapamycin prevents diet-induced obesity in mice and increases the activity of C/EBP-β LAP, a transcription factor that regulates the metabolic shift to lipid catabolism observed in response to calorie restriction. Independent activation of C/EBP-β LAP with the antiretroviral drug adefovir dipivoxil recapitulates the anti-obesogenic effects of rapamycin without reducing signaling through mTORC1 and increases markers of fat catabolism in the liver. Our findings support a model that C/EBP-β LAP acts downstream of mTORC1 signaling to regulate fat metabolism and identifies a novel drug that may be exploited to treat obesity and decrease the incidence of age-related disease.
Collapse
|
14
|
Age and Sex: Impact on adipose tissue metabolism and inflammation. Mech Ageing Dev 2021; 199:111563. [PMID: 34474078 DOI: 10.1016/j.mad.2021.111563] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 08/19/2021] [Accepted: 08/26/2021] [Indexed: 02/08/2023]
Abstract
Age associated chronic inflammation is a major contributor to diseases with advancing age. Adipose tissue function is at the nexus of processes contributing to age-related metabolic disease and mediating longevity. Hormonal fluctuations in aging potentially regulate age-associated visceral adiposity and metabolic dysfunction. Visceral adiposity in aging is linked to aberrant adipogenesis, insulin resistance, lipotoxicity and altered adipokine secretion. Age-related inflammatory phenomena depict sex differences in macrophage polarization, changes in T and B cell numbers, and types of dendritic cells. Sex differences are also observed in adipose tissue remodeling and cellular senescence suggesting a role for sex steroid hormones in the regulation of the adipose tissue microenvironment. It is crucial to investigate sex differences in aging clinical outcomes to identify and better understand physiology in at-risk individuals. Early interventions aimed at targets involved in adipose tissue adipogenesis, remodeling and inflammation in aging could facilitate a profound impact on health span and overcome age-related functional decline.
Collapse
|
15
|
Shen Z, Hinson A, Miller RA, Garcia GG. Cap-independent translation: A shared mechanism for lifespan extension by rapamycin, acarbose, and 17α-estradiol. Aging Cell 2021; 20:e13345. [PMID: 33742521 PMCID: PMC8135077 DOI: 10.1111/acel.13345] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 02/10/2021] [Accepted: 02/21/2021] [Indexed: 01/24/2023] Open
Abstract
We hypothesized that rapamycin (Rapa), acarbose (ACA), which both increase mouse lifespan, and 17α-estradiol, which increases lifespan in males (17aE2) all share common intracellular signaling pathways with long-lived Snell dwarf, PAPPA-KO, and Ghr-/- mice. The long-lived mutant mice exhibit reduction in mTORC1 activity, declines in cap-dependent mRNA translation, and increases in cap-independent translation (CIT). Here, we report that Rapa and ACA prevent age-related declines in CIT target proteins in both sexes, while 17aE2 has the same effect only in males, suggesting increases in CIT. mTORC1 activity showed the reciprocal pattern, with age-related increases blocked by Rapa, ACA, and 17aE2 (in males only). METTL3, required for addition of 6-methyl-adenosine to mRNA and thus a trigger for CIT, also showed an age-dependent increase blunted by Rapa, ACA, and 17aE2 (in males). Diminution of mTORC1 activity and increases in CIT-dependent proteins may represent a shared pathway for both long-lived-mutant mice and drug-induced lifespan extension in mice.
Collapse
Affiliation(s)
- Ziqian Shen
- Department of Molecular, Cellular, and Developmental BiologyUniversity of Michigan College of Literature, Science, and the ArtsAnn ArborMichiganUSA
| | - Abby Hinson
- Department of Molecular, Cellular, and Developmental BiologyUniversity of Michigan College of Literature, Science, and the ArtsAnn ArborMichiganUSA
| | - Richard A. Miller
- Department of PathologyUniversity of Michigan School of MedicineAnn ArborMichiganUSA,University of Michigan Geriatrics CenterAnn ArborMichiganUSA
| | - Gonzalo G. Garcia
- Department of PathologyUniversity of Michigan School of MedicineAnn ArborMichiganUSA
| |
Collapse
|
16
|
Moreno Fernández-Ayala DJ, Navas P, López-Lluch G. Age-related mitochondrial dysfunction as a key factor in COVID-19 disease. Exp Gerontol 2020; 142:111147. [PMID: 33171276 PMCID: PMC7648491 DOI: 10.1016/j.exger.2020.111147] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 11/03/2020] [Accepted: 11/04/2020] [Indexed: 02/07/2023]
Abstract
SARS-CoV-2 causes a severe pneumonia (COVID-19) that affects essentially elderly people. In COVID-19, macrophage infiltration into the lung causes a rapid and intense cytokine storm leading finally to a multi-organ failure and death. Comorbidities such as metabolic syndrome, obesity, type 2 diabetes, lung and cardiovascular diseases, all of them age-associated diseases, increase the severity and lethality of COVID-19. Mitochondrial dysfunction is one of the hallmarks of aging and COVID-19 risk factors. Dysfunctional mitochondria is associated with defective immunological response to viral infections and chronic inflammation. This review discuss how mitochondrial dysfunction is associated with defective immune response in aging and different age-related diseases, and with many of the comorbidities associated with poor prognosis in the progression of COVID-19. We suggest here that chronic inflammation caused by mitochondrial dysfunction is responsible of the explosive release of inflammatory cytokines causing severe pneumonia, multi-organ failure and finally death in COVID-19 patients. Preventive treatments based on therapies improving mitochondrial turnover, dynamics and activity would be essential to protect against COVID-19 severity.
Collapse
Affiliation(s)
- Daniel J Moreno Fernández-Ayala
- Centro Andaluz de Biología del Desarrollo, Universidad Pablo de Olavide-CSIC, CIBERER, Instituto de Salud Carlos III, 41013 Sevilla, Spain
| | - Plácido Navas
- Centro Andaluz de Biología del Desarrollo, Universidad Pablo de Olavide-CSIC, CIBERER, Instituto de Salud Carlos III, 41013 Sevilla, Spain
| | - Guillermo López-Lluch
- Centro Andaluz de Biología del Desarrollo, Universidad Pablo de Olavide-CSIC, CIBERER, Instituto de Salud Carlos III, 41013 Sevilla, Spain.
| |
Collapse
|
17
|
Khosla S, Farr JN, Tchkonia T, Kirkland JL. The role of cellular senescence in ageing and endocrine disease. Nat Rev Endocrinol 2020; 16:263-275. [PMID: 32161396 PMCID: PMC7227781 DOI: 10.1038/s41574-020-0335-y] [Citation(s) in RCA: 259] [Impact Index Per Article: 64.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/14/2020] [Indexed: 12/19/2022]
Abstract
With the ageing of the global population, interest is growing in the 'geroscience hypothesis', which posits that manipulation of fundamental ageing mechanisms will delay (in parallel) the appearance or severity of multiple chronic, non-communicable diseases, as these diseases share the same underlying risk factor - namely, ageing. In this context, cellular senescence has received considerable attention as a potential target in preventing or treating multiple age-related diseases and increasing healthspan. Here we review mechanisms of cellular senescence and approaches to target this pathway therapeutically using 'senolytic' drugs that kill senescent cells or inhibitors of the senescence-associated secretory phenotype (SASP). Furthermore, we highlight the evidence that cellular senescence has a causative role in multiple diseases associated with ageing. Finally, we focus on the role of cellular senescence in a number of endocrine diseases, including osteoporosis, metabolic syndrome and type 2 diabetes mellitus, as well as other endocrine conditions. Although much remains to be done, considerable preclinical evidence is now leading to the initiation of proof-of-concept clinical trials using senolytics for several endocrine and non-endocrine diseases.
Collapse
Affiliation(s)
- Sundeep Khosla
- Division of Endocrinology, Mayo Clinic, Rochester, MN, USA.
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, MN, USA.
| | - Joshua N Farr
- Division of Endocrinology, Mayo Clinic, Rochester, MN, USA
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, MN, USA
| | - Tamara Tchkonia
- Division of Endocrinology, Mayo Clinic, Rochester, MN, USA
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, MN, USA
| | - James L Kirkland
- Division of Endocrinology, Mayo Clinic, Rochester, MN, USA.
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, MN, USA.
| |
Collapse
|