1
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Gabrawy MM, Westbrook R, King A, Khosravian N, Ochaney N, DeCarvalho T, Wang Q, Yu Y, Huang Q, Said A, Abadir M, Zhang C, Khare P, Fairman JE, Le A, Milne GL, Vonhoff FJ, Walston JD, Abadir PM. Dual treatment with kynurenine pathway inhibitors and NAD + precursors synergistically extends life span in Drosophila. Aging Cell 2024; 23:e14102. [PMID: 38481042 PMCID: PMC11019140 DOI: 10.1111/acel.14102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 01/19/2024] [Accepted: 01/24/2024] [Indexed: 04/17/2024] Open
Abstract
Tryptophan catabolism is highly conserved and generates important bioactive metabolites, including kynurenines, and in some animals, NAD+. Aging and inflammation are associated with increased levels of kynurenine pathway (KP) metabolites and depleted NAD+, factors which are implicated as contributors to frailty and morbidity. Contrastingly, KP suppression and NAD+ supplementation are associated with increased life span in some animals. Here, we used DGRP_229 Drosophila to elucidate the effects of KP elevation, KP suppression, and NAD+ supplementation on physical performance and survivorship. Flies were chronically fed kynurenines, KP inhibitors, NAD+ precursors, or a combination of KP inhibitors with NAD+ precursors. Flies with elevated kynurenines had reduced climbing speed, endurance, and life span. Treatment with a combination of KP inhibitors and NAD+ precursors preserved physical function and synergistically increased maximum life span. We conclude that KP flux can regulate health span and life span in Drosophila and that targeting KP and NAD+ metabolism can synergistically increase life span.
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Affiliation(s)
- Mariann M. Gabrawy
- School of Medicine, Division of Geriatric Medicine and Gerontology, Biology of Healthy Aging ProgramJohns Hopkins UniversityBaltimoreMarylandUSA
| | - Reyhan Westbrook
- School of Medicine, Division of Geriatric Medicine and Gerontology, Biology of Healthy Aging ProgramJohns Hopkins UniversityBaltimoreMarylandUSA
| | - Austin King
- School of Medicine, Division of Geriatric Medicine and Gerontology, Biology of Healthy Aging ProgramJohns Hopkins UniversityBaltimoreMarylandUSA
- Department of Biological SciencesUniversity of Maryland, Baltimore CountyBaltimoreMarylandUSA
| | - Nick Khosravian
- School of Medicine, Division of Geriatric Medicine and Gerontology, Biology of Healthy Aging ProgramJohns Hopkins UniversityBaltimoreMarylandUSA
- Department of Biological SciencesUniversity of Maryland, Baltimore CountyBaltimoreMarylandUSA
| | - Neeraj Ochaney
- School of Medicine, Division of Geriatric Medicine and Gerontology, Biology of Healthy Aging ProgramJohns Hopkins UniversityBaltimoreMarylandUSA
- Department of Biological SciencesUniversity of Maryland, Baltimore CountyBaltimoreMarylandUSA
| | - Tagide DeCarvalho
- Department of Biological SciencesUniversity of Maryland, Baltimore CountyBaltimoreMarylandUSA
| | - Qinchuan Wang
- School of Medicine, Division of Geriatric Medicine and Gerontology, Biology of Healthy Aging ProgramJohns Hopkins UniversityBaltimoreMarylandUSA
| | - Yuqiong Yu
- School of Medicine, Division of Geriatric Medicine and Gerontology, Biology of Healthy Aging ProgramJohns Hopkins UniversityBaltimoreMarylandUSA
| | - Qiao Huang
- School of Medicine, Division of Geriatric Medicine and Gerontology, Biology of Healthy Aging ProgramJohns Hopkins UniversityBaltimoreMarylandUSA
| | - Adam Said
- School of Medicine, Division of Geriatric Medicine and Gerontology, Biology of Healthy Aging ProgramJohns Hopkins UniversityBaltimoreMarylandUSA
- Emory UniversityAtlantaGeorgiaUSA
| | - Michael Abadir
- School of Medicine, Division of Geriatric Medicine and Gerontology, Biology of Healthy Aging ProgramJohns Hopkins UniversityBaltimoreMarylandUSA
- University of Maryland, College ParkCollege ParkMarylandUSA
| | | | | | - Jennifer E. Fairman
- Department of Arts as Applied to MedicineJohns Hopkins UniversityBaltimoreMarylandUSA
| | - Anne Le
- Gigantest Inc.BaltimoreMarylandUSA
| | - Ginger L. Milne
- Vanderbilt UniversityVanderbilt Brain Institute, Neurochemistry CoreNashvilleTennesseeUSA
| | - Fernando J. Vonhoff
- Department of Biological SciencesUniversity of Maryland, Baltimore CountyBaltimoreMarylandUSA
| | - Jeremy D. Walston
- School of Medicine, Division of Geriatric Medicine and Gerontology, Biology of Healthy Aging ProgramJohns Hopkins UniversityBaltimoreMarylandUSA
| | - Peter M. Abadir
- School of Medicine, Division of Geriatric Medicine and Gerontology, Biology of Healthy Aging ProgramJohns Hopkins UniversityBaltimoreMarylandUSA
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Chung T, Bopp T, Ward C, Notarangelo FM, Schwarcz R, Westbrook R, Xue Q, Walston J, Hoke A. Deletion of quinolinate phosphoribosyltransferase gene accelerates frailty phenotypes and neuromuscular decline with aging in a sex-specific pattern. Aging Cell 2023; 22:e13849. [PMID: 37078472 PMCID: PMC10352574 DOI: 10.1111/acel.13849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 03/28/2023] [Accepted: 03/30/2023] [Indexed: 04/21/2023] Open
Abstract
Decline in neuromuscular function with aging is known to be a major determinant of disability and all-cause mortality in late life. Despite the importance of the problem, the neurobiology of age-associated muscle weakness is poorly understood. In a previous report, we performed untargeted metabolomics on frail older adults and discovered prominent alteration in the kynurenine pathway, the major route of dietary tryptophan degradation that produces neurotoxic intermediate metabolites. We also showed that neurotoxic kynurenine pathway metabolites are correlated with increased frailty score. For the present study, we sought to further examine the neurobiology of these neurotoxic intermediates by utilizing a mouse model that has a deletion of the quinolinate phosphoribosyltransferase (QPRT) gene, a rate-limiting step of the kynurenine pathway. QPRT-/- mice have elevated neurotoxic quinolinic acid level in the nervous system throughout their lifespan. We found that QPRT-/- mice have accelerated declines in neuromuscular function in an age- and sex-specific manner compared to control strains. In addition, the QPRT-/- mice show premature signs of frailty and body composition changes that are typical for metabolic syndrome. Our findings suggest that the kynurenine pathway may play an important role in frailty and age-associated muscle weakness.
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Affiliation(s)
- Tae Chung
- Department of Physical Medicine and RehabilitationJohns Hopkins University School of MedicineBaltimoreMarylandUSA
- Department of NeurologyNeuromuscular DivisionJohns Hopkins University School of MedicineBaltimoreMarylandUSA
| | - Taylor Bopp
- Department of Physical Medicine and RehabilitationJohns Hopkins University School of MedicineBaltimoreMarylandUSA
| | - Chris Ward
- Department of OrthopedicsUniversity of Maryland School of MedicineBaltimoreMarylandUSA
| | - Francesca M. Notarangelo
- Maryland Psychiatric Research CenterDepartment of PsychiatryUniversity of Maryland School of MedicineBaltimoreMarylandUSA
| | - Robert Schwarcz
- Maryland Psychiatric Research CenterDepartment of PsychiatryUniversity of Maryland School of MedicineBaltimoreMarylandUSA
| | - Reyhan Westbrook
- Department of Geriatric Medicine and GerontologyJohns Hopkins University School of MedicineBaltimoreMarylandUSA
| | - Qian‐Li Xue
- Department of Geriatric Medicine and GerontologyJohns Hopkins University School of MedicineBaltimoreMarylandUSA
| | - Jeremy Walston
- Department of Geriatric Medicine and GerontologyJohns Hopkins University School of MedicineBaltimoreMarylandUSA
| | - Ahmet Hoke
- Department of NeurologyNeuromuscular DivisionJohns Hopkins University School of MedicineBaltimoreMarylandUSA
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3
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Lee JL, Zhang C, Westbrook R, Gabrawy MM, Nidadavolu L, Yang H, Marx R, Wu Y, Anders NM, Ma L, Bichara MD, Kwak MJ, Buta B, Khadeer M, Yenokyan G, Tian J, Xue QL, Siragy HM, Carey RM, de Cabo R, Ferrucci L, Moaddel R, Rudek MA, Le A, Walston JD, Abadir PM. Serum Concentrations of Losartan Metabolites Correlate With Improved Physical Function in a Pilot Study of Prefrail Older Adults. J Gerontol A Biol Sci Med Sci 2022; 77:2356-2366. [PMID: 35511890 PMCID: PMC9799219 DOI: 10.1093/gerona/glac102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Indexed: 01/20/2023] Open
Abstract
Losartan is an oral antihypertensive agent that is rapidly metabolized to EXP3174 (angiotensin-subtype-1-receptor blocker) and EXP3179 (peroxisome proliferator-activated receptor gamma [PPARγ] agonist), which was shown in animal studies to reduce inflammation, enhance mitochondrial energetics, and improve muscle repair and physical performance. We conducted an exploratory pilot study evaluating losartan treatment in prefrail older adults (age 70-90 years, N = 25). Participants were randomized to control (placebo) or treatment (daily oral losartan beginning at 25 mg per day and increasing every 8 weeks) for a total of 6 months. Fatigue, hyperkalemia, and hypotension were the most observed side effects of losartan treatment. Participants in the losartan group had an estimated 89% lower odds of frailty (95% confidence interval [CI]: 18% to 99% lower odds, p = .03), with a 0.3-point lower frailty score than the placebo group (95% CI: 0.01-0.5 lower odds, p = .04). Frailty score was also negatively associated with serum losartan and EXP3179 concentrations. For every one standard deviation increase in EXP3179 (ie, 0.0011 ng/μL, based on sample values above detection limit) and EXP3174 (ie, 0.27 ng/μL, based on sample values above detection limit), there was a 0.0035 N (95% CI: 0.0019-0.0051, p < .001) and a 0.0027 N (95% CI: 0.00054-0.0043, p = .007) increase in average knee strength, respectively.
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Affiliation(s)
- Jessica L Lee
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland,USA
- Department of Internal Medicine, Division of Geriatric and Palliative Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas, USA
| | - Cissy Zhang
- Department of Oncology, Division of Cancer Chemical and Structural Biology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Reyhan Westbrook
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Mariann M Gabrawy
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Lolita Nidadavolu
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Huanle Yang
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Ruth Marx
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Yuqiong Wu
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Nicole M Anders
- Department of Oncology, Division of Cancer Chemical and Structural Biology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- The Johns Hopkins Analytical Pharmacology Core Laboratory, Clinical Pharmacology, Baltimore, MD, USA
| | - Lina Ma
- Department of Geriatrics, Xuanwu Hospital, Capital Medical University, China National Clinical Research Center for Geriatric Disorders, Beijing, China
| | - Marcela-Dávalos Bichara
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Min-Ji Kwak
- Department of Internal Medicine, Division of Geriatric and Palliative Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas, USA
| | - Brian Buta
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Mohammed Khadeer
- Translational Gerontology Branch, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, USA
| | - Gayane Yenokyan
- Johns Hopkins Biostatistics Center, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Jing Tian
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Qian-Li Xue
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Helmy M Siragy
- Department of Medicine, Division of Endocrine and Metabolism, University of Virginia, Charlottesville, Virginia, USA
| | - Robert M Carey
- Department of Medicine, Division of Endocrine and Metabolism, University of Virginia, Charlottesville, Virginia, USA
| | - Rafael de Cabo
- Translational Gerontology Branch, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, USA
| | - Luigi Ferrucci
- Translational Gerontology Branch, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, USA
| | - Ruin Moaddel
- Translational Gerontology Branch, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, USA
| | - Michelle A Rudek
- The Johns Hopkins Analytical Pharmacology Core Laboratory, Clinical Pharmacology, Baltimore, MD, USA
- Department of Medicine, Division of Clinical Pharmacology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Anne Le
- The Johns Hopkins Analytical Pharmacology Core Laboratory, Clinical Pharmacology, Baltimore, MD, USA
- Department of Pathology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Jeremy D Walston
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Peter M Abadir
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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4
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Westbrook R, Zhang C, Yang H, Tian J, Guo S, Xue QL, Walston J, Le A, Abadir PM. Metabolomics-Based Identification of Metabolic Dysfunction in Frailty. J Gerontol A Biol Sci Med Sci 2022; 77:2367-2372. [PMID: 36580380 PMCID: PMC9799179 DOI: 10.1093/gerona/glab315] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Indexed: 12/30/2022] Open
Abstract
Dysregulation of energy producing metabolic pathways has been observed in older adults with frailty. In this study, we used liquid chromatography-mass spectrometry technology to identify aging- and frailty-related differences in metabolites involved in glycolysis, the tricarboxylic (TCA) cycle, and other energy metabolism-related pathways in the serum of a cohort of community-dwelling adults aged 20-97 (n = 146). We also examined the relationship between serum levels of metabolites and functional measures, physical frailty, and risk status for adverse health outcomes. We observed elevated levels of TCA cycle and glycolytic intermediates in frail subjects; however, the differences in the levels of ATP and other energy metabolites between young, nonfrail, and frail adults were not significant. Instead, we found that serum levels of neurotransmitters N-acetyl-aspartyl-glutamate, glutamate, and γ-aminobutyric acid were significantly elevated in older adults with frailty. These elevations of glycolytic and TCA cycle intermediates, and neurotransmitters may be part of the biological signature of frailty.
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Affiliation(s)
- Reyhan Westbrook
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Cissy Zhang
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Huanle Yang
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Jing Tian
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Shenghao Guo
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Qian-Li Xue
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Jeremy Walston
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Department of Family Medicine, Kyung Hee University, Seoul, South Korea
| | - Anne Le
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland, USA
| | - Peter M Abadir
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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5
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Westbrook R, Abadir PM. Metabolomics Captures the Biological Signatures of Aging and Health Span and Identifies Pathway Targets for Intervention. J Gerontol A Biol Sci Med Sci 2022; 77:2343-2345. [PMID: 36041017 PMCID: PMC9799213 DOI: 10.1093/gerona/glac176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Indexed: 01/20/2023] Open
Affiliation(s)
- Reyhan Westbrook
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Peter M Abadir
- Department of Medicine, Division of Geriatric Medicine and Gerontology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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6
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Selvarajah K, Hulme A, Westbrook R, Ali S, Harrison S. P.81 Anaesthetic challenges of decompensated cirrhosis & COVID-19 in emergency caesarean section. Int J Obstet Anesth 2022. [DOI: 10.1016/j.ijoa.2022.103377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Gananandan K, Thomas R, Burke N, Jameie-Oskooei S, Singh A, Westbrook R, Ryan J. Adult-onset Still's disease with secondary haemophagocytic lymphohistiocytosis induced acute liver failure: A case series. Journal of Liver Transplantation 2022. [DOI: 10.1016/j.liver.2021.100059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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8
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Ma L, Nidadavolu LS, Yang H, Langdon J, Westbrook R, Tsui BMW, Lee TS, Hinson J, Ling S, Marx-Rattner R, Wu Y, Nguyen T, Tan J, Khadeer M, Moaddel R, Le A, Walston JD, Abadir PM. Targeted Deletion of Interleukin-6 in a Mouse Model of Chronic Inflammation Demonstrates Opposing Roles in Aging: Benefit and Harm. J Gerontol A Biol Sci Med Sci 2021; 76:211-215. [PMID: 32585682 PMCID: PMC7812426 DOI: 10.1093/gerona/glaa156] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Indexed: 01/17/2023] Open
Abstract
Chronic inflammation (CI) in older adults is associated with reduced health span and life span. Interleukin-6 (IL-6) is one CI marker that is strongly associated with adverse health outcomes and mortality in aging. We have previously characterized a mouse model of frailty and chronic inflammatory pathway activation (IL-10tm/tm, IL-10 KO) that demonstrates the upregulation of numerous proinflammatory cytokines, including IL-6. We sought to identify a more specific role for IL-6 within the context of CI and aging and developed a mouse with targeted deletion of both IL-10 and IL-6 (IL-10tm/tm/IL-6tm/tm, DKO). Phenotypic characteristics, cytokine measurements, cardiac myocardial oxygen consumption, physical function, and survival were measured in DKO mice and compared to age- and gender-matched IL-10 KO and wild-type mice. Our findings demonstrate that selective knockdown of IL-6 in a frail mouse with CI resulted in the reversal of some of the CI-associated changes. We observed increased protective mitochondrial-associated lipid metabolites, decreased cardiac oxaloacetic acid, improved myocardial oxidative metabolism, and better short-term functional performance in DKO mice. However, the DKO mice also demonstrated higher mortality. This work shows the pleiotropic effects of IL-6 on aging and frailty.
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Affiliation(s)
- Lina Ma
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Department of Geriatrics, Xuanwu Hospital, Capital Medical University, China National Clinical Research Center for Geriatric Disorders, Beijing, China
| | - Lolita S Nidadavolu
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Huanle Yang
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Jackie Langdon
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Reyhan Westbrook
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Benjamin M W Tsui
- Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Taek-Soo Lee
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Jared Hinson
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Shizhang Ling
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Ruth Marx-Rattner
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Yuqiong Wu
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Tu Nguyen
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Jessica Tan
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Mohammed Khadeer
- Laboratory of Clinical Investigation, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, Maryland
| | - Ruin Moaddel
- Laboratory of Clinical Investigation, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, Maryland
| | - Anne Le
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Jeremy D Walston
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Peter M Abadir
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland
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Ge N, Westbrook R, Langdon J, Yang H, Marx R, Abadir P, Xue QL, Walston JD. Plasma levels of corticosterone, tumor necrosis factor receptor 1 and interleukin 6 are influenced by age, sex and chronic inflammation in mice treated with acute temperature stress. Exp Gerontol 2020; 142:111136. [PMID: 33164891 DOI: 10.1016/j.exger.2020.111136] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 10/01/2020] [Accepted: 10/21/2020] [Indexed: 02/05/2023]
Abstract
Resiliency is the ability to respond to, adapt to and recover from stressors. Deterioration of resiliency in older adults has been hypothesized to be regulated by age-related changes in stress response systems, including the Hypothalamic Pituitary Adrenal (HPA) axis and the innate immune system response. Although age-related chronic inflammation is strongly related to lack of resiliency, the impact of chronic inflammation on acute stress response is unclear. Here we describe the impact of a five-hour exposure to cold temperature acute stressor, on immune and corticosterone response using older and younger IL-10tm/tm mice, a mouse model with chronic inflammatory pathway activation, and age and gender matched C57/Bl6 background control (WT) mice. Overall, mice exposed to 4 °C for 5 h had significantly higher plasma corticosterone levels compared to those that remained at room temperature (25 °C), with the exception of the WT females. Cold stressed mice had lower plasma tumor necrosis factor receptor 1 (TNFR1) levels with varying significance, in all ages and phenotypes, with the exception of the old female WT mice. In contrast, the effects of cold stress on pro-inflammatory cytokine interleukin 6 (IL-6) levels were inconsistent and not significant, with the exception of the female IL-10tm/tm mice. In conclusion, these findings demonstrate that sex, age and chronic inflammatory pathway activation all influence corticosterone secretion and inflammatory processes in the face of acute cold stress.
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Affiliation(s)
- Ning Ge
- Department of Medicine, Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, MD 21224, USA; The Center of Gerontology and Geriatrics, West China Hospital, Sichuan University, Chengdu 610041, PR China
| | - Reyhan Westbrook
- Department of Medicine, Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, MD 21224, USA
| | - Jacqueline Langdon
- Department of Medicine, Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, MD 21224, USA
| | - Huanle Yang
- Department of Medicine, Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, MD 21224, USA
| | - Ruth Marx
- Department of Medicine, Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, MD 21224, USA
| | - Peter Abadir
- Department of Medicine, Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, MD 21224, USA
| | - Qian-Li Xue
- Department of Medicine, Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, MD 21224, USA
| | - Jeremy D Walston
- Department of Medicine, Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, MD 21224, USA.
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10
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Westbrook R, Chung T, Lovett J, Ward C, Joca H, Yang H, Khadeer M, Tian J, Xue QL, Le A, Ferrucci L, Moaddel R, de Cabo R, Hoke A, Walston J, Abadir PM. Kynurenines link chronic inflammation to functional decline and physical frailty. JCI Insight 2020; 5:136091. [PMID: 32814718 PMCID: PMC7455140 DOI: 10.1172/jci.insight.136091] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Accepted: 07/15/2020] [Indexed: 12/27/2022] Open
Abstract
Chronic inflammation is associated with physical frailty and functional decline in older adults; however, the molecular mechanisms of this linkage are not understood. A mouse model of chronic inflammation showed reduced motor function and partial denervation at the neuromuscular junction. Metabolomic profiling of these mice and further validation in frail human subjects showed significant dysregulation in the tryptophan degradation pathway, including decreased tryptophan and serotonin, and increased levels of some neurotoxic kynurenines. In humans, kynurenine strongly correlated with age, frailty status, TNF-αR1 and IL-6, weaker grip strength, and slower walking speed. To study the effects of elevated neurotoxic kynurenines on motor neuronal cell viability and axonal degeneration, we used motor neuronal cells treated with 3-hydroxykynurenine and quinolinic acid and observed neurite degeneration in a dose-dependent manner and potentiation of toxicity between 3-hydroxykynurenine and quinolinic acid. These results suggest that kynurenines mediate neuromuscular dysfunction associated with chronic inflammation and aging. Tryptophan-related toxic metabolites known as kynurenines are altered with chronic inflammation, which damages nerves in aged and frail mice and humans.
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Affiliation(s)
| | - Tae Chung
- Department of Physical Medicine and Rehabilitation, and.,Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | | | - Chris Ward
- Department of Orthopedics and Biomedical Engineering and Technology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Humberto Joca
- Department of Orthopedics and Biomedical Engineering and Technology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Huanle Yang
- Division of Geriatric Medicine and Gerontology
| | | | - Jing Tian
- Division of Geriatric Medicine and Gerontology
| | - Qian-Li Xue
- Division of Geriatric Medicine and Gerontology
| | - Anne Le
- Department of Oncology and.,Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Luigi Ferrucci
- National Institute on Aging, NIH, Baltimore, Maryland, USA
| | - Ruin Moaddel
- National Institute on Aging, NIH, Baltimore, Maryland, USA
| | - Rafa de Cabo
- National Institute on Aging, NIH, Baltimore, Maryland, USA
| | - Ahmet Hoke
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Jeremy Walston
- Division of Geriatric Medicine and Gerontology.,Department of Medicine, Kyung Hee University, Seoul, South Korea
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11
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Malinina A, Dikeman D, Westbrook R, Moats M, Gidner S, Poonyagariyagorn H, Walston J, Neptune ER. IL10 deficiency promotes alveolar enlargement and lymphoid dysmorphogenesis in the aged murine lung. Aging Cell 2020; 19:e13130. [PMID: 32170906 PMCID: PMC7189990 DOI: 10.1111/acel.13130] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 12/22/2019] [Accepted: 02/04/2020] [Indexed: 12/13/2022] Open
Abstract
The connection between aging-related immune dysfunction and the lung manifestations of aging is poorly understood. A detailed characterization of the aging IL10-deficient murine lung, a model of accelerated aging and frailty, reconciles features of both immunosenescence and lung aging in a coherent model. Airspace enlargement developed in the middle-aged (12 months old) and aged (20-22 months old) IL10-deficient lung punctuated by an expansion of macrophages and alveolar cell apoptosis. Compared to wild-type (WT) controls, the IL10-deficient lungs from young (4-month-old) mice showed increased oxidative stress which was enhanced in both genotypes by aging. Active caspase 3 staining was increased in the alveolar epithelial cells of aged WT and mutant lungs but was greater in the IL10-deficient milieu. Lung macrophages were increased in the aged IL10-deficient lungs with exuberant expression of MMP12. IL10 treatment of naïve and M2-polarized bone marrow-derived WT macrophages reduced MMP12 expression. Conditioned media studies demonstrated the secretome of aged mutant macrophages harbors reduced AECII prosurvival factors, specifically keratinocyte growth factor (KGF) and hepatocyte growth factor (HGF), promotes cell death, and reduces survival of primary alveolar epithelial cells. Compared to WT controls, aged IL10-deficient mice have increased parenchymal lymphoid collections comprised of a reduced number of apoptotic cells and B cells. We establish that IL10 is a key modulator of airspace homeostasis and lymphoid morphogenesis in the aging lung enabling macrophage-mediated alveolar epithelial cell survival and B-cell survival within tertiary lymphoid structures.
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Affiliation(s)
- Alla Malinina
- Pulmonary and Critical Care Medicine Johns Hopkins School of Medicine Baltimore MD USA
| | - Dustin Dikeman
- Pulmonary and Critical Care Medicine Johns Hopkins School of Medicine Baltimore MD USA
| | - Reyhan Westbrook
- Division of Geriatrics Johns Hopkins School of Medicine Baltimore MD USA
| | - Michelle Moats
- Pulmonary and Critical Care Medicine Johns Hopkins School of Medicine Baltimore MD USA
- Departments of Biology and Chemistry and Biochemistry Florida International University Miami FL USA
| | - Sarah Gidner
- Pulmonary and Critical Care Medicine Johns Hopkins School of Medicine Baltimore MD USA
| | | | - Jeremy Walston
- Division of Geriatrics Johns Hopkins School of Medicine Baltimore MD USA
| | - Enid R. Neptune
- Pulmonary and Critical Care Medicine Johns Hopkins School of Medicine Baltimore MD USA
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Cauldwell M, Mackie FL, Steer PJ, Henehghan MA, Baalman JH, Brennand J, Johnston T, Dockree S, Hedley C, Jarvis S, Khan S, McAuliffe FM, Mackillop L, Penna L, Smith B, Trivedi P, Verma S, Westbrook R, Winifield S, Williamson C. Pregnancy outcomes in women with primary biliary cholangitis and primary sclerosing cholangitis: a retrospective cohort study. BJOG 2020; 127:876-884. [DOI: 10.1111/1471-0528.16119] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/20/2020] [Indexed: 12/17/2022]
Affiliation(s)
- M Cauldwell
- Academic Department of Obstetrics and Gynaecology Chelsea and Westminster Hospital London UK
| | - FL Mackie
- Academic Department of Obstetrics and Gynaecology Birmingham Women’s and Children’s NHS Foundation Trust Birmingham UK
| | - PJ Steer
- Academic Department of Obstetrics and Gynaecology Chelsea and Westminster Hospital London UK
| | | | - JH Baalman
- UCD Perinatal Research Centre School of Medicine University College Dublin National Maternity Hospital Dublin Ireland
| | - J Brennand
- Department of Obstetrics Queen Elizabeth Hospital Glasgow Glasgow UK
| | - T Johnston
- Academic Department of Obstetrics and Gynaecology Birmingham Women’s and Children’s NHS Foundation Trust Birmingham UK
| | - S Dockree
- Women’s Centre Oxford University Hospitals NHS Foundation Trust Oxford UK
| | - C Hedley
- Department of Obstetrics King’s College Hospital London UK
| | - S Jarvis
- Department of Obstetrics Queen Charlotte’s and Chelsea Hospital London UK
| | - S Khan
- Liver Unit Queen Elizabeth Hospital Birmingham UK
| | - FM McAuliffe
- UCD Perinatal Research Centre School of Medicine University College Dublin National Maternity Hospital Dublin Ireland
| | - L Mackillop
- Women’s Centre Oxford University Hospitals NHS Foundation Trust Oxford UK
| | - L Penna
- Department of Obstetrics King’s College Hospital London UK
| | - B Smith
- Department of Hepatology Hammersmith Hospital London UK
| | - P Trivedi
- Liver Unit Queen Elizabeth Hospital Birmingham UK
| | - S Verma
- Department of Clinical and Experimental Medicine Brighton and Sussex Medical School Brighton UK
- Department of Gastroenterology and Hepatology Brighton and Sussex University Hospitals Brighton UK
| | - R Westbrook
- Department of Hepatology Royal Free Hospital London UK
| | - S Winifield
- Department of Obstetrics Leeds Teaching Hospitals Leeds UK
| | - C Williamson
- Department of Women and Children’s Health King’s College London London UK
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13
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Westbrook R, Chung T, Lovett J, Ward C, Khadeer M, Moaddel R, Walston J, Abadir P. ALTERED TRYPTOPHAN DEGRADATION LINKS CHRONIC INFLAMMATION TO FUNCTIONAL DECLINE & FRAILTY IN MICE AND HUMANS. Innov Aging 2019. [PMCID: PMC6845122 DOI: 10.1093/geroni/igz038.3473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Chronic inflammation is associated with frailty and functional decline in older adults but the molecular mechanisms of this linkage are not well understood. We sought to examine metabolic and physiologic states associated with aging and frailty by analyzing the composition of metabolites in the blood of a population of community dwelling young, and older adults. Serum inflammatory cytokines and demographic and physiological covariates were collected in a set of community-dwelling adults age 20-97 (n=166). We then used LC/MS technology to profile 121 metabolites from five substance classes. Associations of the cytokines and metabolites with grip strength, walking speed, falls and outcomes were assessed in young, robust, pre-frail and frail participants. Age and frailty status positively correlated with IL6, TNFα, TNFαR1, IL1β (p<0.0001). Analysis of metabolites revealed significant alterations in tryptophan degradation pathway with aging and frailty. Among the top metabolites to correlate with age and frailty status were kynurenine (p<0.0001) and the kynurenine/tryptophan ratio (p<0.0001). The kynurenine/tryptophan ratio also tightly correlated with serum inflammatory cytokines TNFαR1 (p<0.0001) and IL-6 (p<0.0001). Higher kynurenine/tryptophan levels were associated with weaker grip strength and slower walking speed, even after adjusting for age, gender, BMI and blood pressure. Further dissection of the pathway revealed the accumulation of 3-hydroxykynurenine, a cytotoxic and neurotoxic intermediate from the kynurenine pathway, with frailty. The increased levels of cytotoxic and neurotoxic molecules in this pathway may in part explain the link between inflammation and cognitive and physical decline in frailty.
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Affiliation(s)
- Reyhan Westbrook
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
| | - Tae Chung
- Department of Physical Medicine and Rehabilitation, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
| | - Jacqueline Lovett
- National Institute on Aging, National Institutes of Health, Baltimore, Maryland, United States
| | - Chris Ward
- Department of Orthopedics, University of Maryland School of Medicine, Baltimore, Maryland, United States
| | - Mohammed Khadeer
- National Institute on Aging, National Institutes of Health, Baltimore, Maryland, United States
| | - Ruin Moaddel
- National Institute on Aging, National Institutes of Health, Baltimore, Maryland, United States
| | - Jeremy Walston
- Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
| | - Peter Abadir
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
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14
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Abstract
Human and animal studies suggest that inflammation occurring outside the central nervous system (systemic inflammation) may play a key role in promoting neurodegeneration, Alzheimer's disease pathology, and cognitive decline in older adults. Systemic inflammation, which is marked by increased blood levels of circulating proinflammatory cytokines and chemokines, may occur as a result of events such as infection, chronic disease, and physical and psychological stress, but may also occur outside the context of these conditions as a result of subclinical processes such as cellular senescence. Proinflammatory cytokines within the body can promote a proinflammatory environment in the central nervous system by crossing the blood-brain barrier, signaling through endothelial cells or circumventricular organs, and by stimulating the vagus nerve, which signals the detection of inflammatory proteins via direct afferent connections to the brain stem. Through each of these routes, systemic inflammation is believed to induce reactive, proinflammatory microglia and astrocytic phenotypes which can promote tau hyperphosphorylation, β-amyloid oligomerization, complement activation, and the breakdown of neurotransmitters into potentially harmful bioactive metabolites. Together, these molecular changes are believed initiate or exacerbate neurodegenerative processes that can eventually lead to cognitive decline and dementia in vulnerable older adults.
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Affiliation(s)
- Keenan A. Walker
- Department of Neurology, Johns Hopkins University, Baltimore, Maryland 21287-0010, United States
| | - Bronte N. Ficek
- Department of Neurology, Johns Hopkins University, Baltimore, Maryland 21287-0010, United States
| | - Reyhan Westbrook
- Department of Medicine, Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, Maryland 21224, United States
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15
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Abstract
Human and animal studies suggest that inflammation occurring outside the central nervous system (systemic inflammation) may play a key role in promoting neurodegeneration, Alzheimer's disease pathology, and cognitive decline in older adults. Systemic inflammation, which is marked by increased blood levels of circulating proinflammatory cytokines and chemokines, may occur as a result of events such as infection, chronic disease, and physical and psychological stress, but may also occur outside the context of these conditions as a result of subclinical processes such as cellular senescence. Proinflammatory cytokines within the body can promote a proinflammatory environment in the central nervous system by crossing the blood-brain barrier, signaling through endothelial cells or circumventricular organs, and by stimulating the vagus nerve, which signals the detection of inflammatory proteins via direct afferent connections to the brain stem. Through each of these routes, systemic inflammation is believed to induce reactive, proinflammatory microglia and astrocytic phenotypes which can promote tau hyperphosphorylation, β-amyloid oligomerization, complement activation, and the breakdown of neurotransmitters into potentially harmful bioactive metabolites. Together, these molecular changes are believed initiate or exacerbate neurodegenerative processes that can eventually lead to cognitive decline and dementia in vulnerable older adults.
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Affiliation(s)
- Keenan A Walker
- Department of Neurology , Johns Hopkins University , Baltimore , Maryland 21287-0010 , United States
| | - Bronte N Ficek
- Department of Neurology , Johns Hopkins University , Baltimore , Maryland 21287-0010 , United States
| | - Reyhan Westbrook
- Department of Medicine, Division of Geriatric Medicine and Gerontology , Johns Hopkins University , Baltimore , Maryland 21224 , United States
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16
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Westbrook R, Le A, Lovett J, Khadeer M, Ferrucci L, Moaddel R, Walston J, Abadir P. ALTERED FRAILTY METABOLOME LINKS CHRONIC INFLAMMATION TO FUNCTIONAL DECLINE. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.228] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- R Westbrook
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, MD, Baltimore, Maryland, United States
| | - A Le
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - J Lovett
- Bioanalytical Chemistry and Drug Discovery Section, National Institute on Aging, National Institutes of Health, Baltimore, MD
| | - M Khadeer
- Bioanalytical Chemistry and Drug Discovery Section, National Institute on Aging, National Institutes of Health, Baltimore, MD
| | - L Ferrucci
- Bioanalytical Chemistry and Drug Discovery Section, National Institute on Aging, National Institutes of Health, Baltimore, MD
| | - R Moaddel
- Bioanalytical Chemistry and Drug Discovery Section, National Institute on Aging, National Institutes of Health, Baltimore, MD
| | - J Walston
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - P Abadir
- Bioanalytical Chemistry and Drug Discovery Section, National Institute on Aging, National Institutes of Health, Baltimore, MD
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17
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Ma L, Westbrook R, Davalos M, Yang H, Walston J, Abadir P. CIRCULATING CELL-FREE APOPTOTIC MITOCHONDRIAL DNA FRAGMENTS IN FRAIL OLD ADULTS. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- L Ma
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, USA, Baltimore, Maryland, United States
| | - R Westbrook
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - M Davalos
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine
| | - H Yang
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - J Walston
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - P Abadir
- Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, Baltimore, MD
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18
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Ge N, Yang H, Westbrook R, Marx-Rattner R, Burks T, Langdon J, Abadir P, Walston J. BLUNTED RESPONSE TO STRESS IN YOUNG IL-10TM/TM MICE: IMPLICATION FOR THE VULNERABILITY IN FRAILTY. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Affiliation(s)
- N. Ge
- Department of Medicine Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, Maryland
- Center of Geriatric Medicine and Gerontology, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - H. Yang
- Department of Medicine Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, Maryland
| | - R. Westbrook
- Department of Medicine Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, Maryland
| | - R. Marx-Rattner
- Department of Medicine Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, Maryland
| | - T. Burks
- Department of Medicine Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, Maryland
| | - J. Langdon
- Department of Medicine Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, Maryland
| | - P. Abadir
- Department of Medicine Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, Maryland
| | - J.D. Walston
- Department of Medicine Division of Geriatric Medicine and Gerontology, Johns Hopkins University, Baltimore, Maryland
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19
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Ko F, Abadir P, Marx R, Westbrook R, Cooke C, Yang H, Walston J. Impaired mitochondrial degradation by autophagy in the skeletal muscle of the aged female interleukin 10 null mouse. Exp Gerontol 2015; 73:23-7. [PMID: 26596403 DOI: 10.1016/j.exger.2015.11.010] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 11/09/2015] [Accepted: 11/17/2015] [Indexed: 10/22/2022]
Abstract
Mitochondrial dysfunction, chronic inflammation and muscle aging are closely linked. Mitochondrial clearance is a process to dampen inflammation and is a critical pre-requisite to mitobiogenesis. The combined effect of aging and chronic inflammation on mitochondrial degradation by autophagy is understudied. In interleukin 10 null mouse (IL-10(tm/tm)), a rodent model of chronic inflammation, we studied the effects of aging and inflammation on mitochondrial clearance. We show that aging in IL-10(tm/tm) is associated with reduced skeletal muscle mitochondrial death signaling and altered formation of autophagosomes, compared to age-matched C57BL/6 controls. Moreover, skeletal muscles of old IL-10(tm/tm) mice have the highest levels of damaged mitochondria with disrupted mitochondrial ultrastructure and autophagosomes compared to all other groups. These observations highlight the interface between chronic inflammation and aging on altered mitochondrial biology in skeletal muscles.
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Affiliation(s)
- Fred Ko
- Icahn School of Medicine at Mount Sinai, Brookdale Department of Geriatrics and Palliative Medicine, USA.
| | - Peter Abadir
- Johns Hopkins University, Division of Geriatrics Medicine and Gerontology, USA
| | - Ruth Marx
- Johns Hopkins University, Division of Geriatrics Medicine and Gerontology, USA
| | - Reyhan Westbrook
- Johns Hopkins University, Division of Geriatrics Medicine and Gerontology, USA
| | - Carol Cooke
- Johns Hopkins University, Cellular and Molecular Medicine, Microscope Facility, Department of Medicine, USA
| | - Huanle Yang
- Johns Hopkins University, Division of Geriatrics Medicine and Gerontology, USA
| | - Jeremy Walston
- Johns Hopkins University, Division of Geriatrics Medicine and Gerontology, USA
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20
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Sun LY, Spong A, Swindell WR, Fang Y, Hill C, Huber JA, Boehm JD, Westbrook R, Salvatori R, Bartke A. Growth hormone-releasing hormone disruption extends lifespan and regulates response to caloric restriction in mice. eLife 2013; 2:e01098. [PMID: 24175087 PMCID: PMC3810783 DOI: 10.7554/elife.01098] [Citation(s) in RCA: 102] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Accepted: 09/25/2013] [Indexed: 12/18/2022] Open
Abstract
We examine the impact of targeted disruption of growth hormone-releasing hormone (GHRH) in mice on longevity and the putative mechanisms of delayed aging. GHRH knockout mice are remarkably long-lived, exhibiting major shifts in the expression of genes related to xenobiotic detoxification, stress resistance, and insulin signaling. These mutant mice also have increased adiponectin levels and alterations in glucose homeostasis consistent with the removal of the counter-insulin effects of growth hormone. While these effects overlap with those of caloric restriction, we show that the effects of caloric restriction (CR) and the GHRH mutation are additive, with lifespan of GHRH-KO mutants further increased by CR. We conclude that GHRH-KO mice feature perturbations in a network of signaling pathways related to stress resistance, metabolic control and inflammation, and therefore provide a new model that can be used to explore links between GHRH repression, downregulation of the somatotropic axis, and extended longevity. DOI:http://dx.doi.org/10.7554/eLife.01098.001 There is increasing evidence that the hormonal systems involved in growth, the metabolism of glucose, and the processes that balance energy intake and expenditure might also be involved in the aging process. In rodents, mutations in genes involved in these hormone-signaling pathways can substantially increase lifespan, as can a diet that is low in calories but which avoids malnutrition. As well as living longer, such mice also show reductions in age-related conditions such as diabetes, memory loss and cancer. Many of these effects appear to involve the actions of growth hormone. Mice with mutations that disrupt the development of the pituitary gland, which produces growth hormone, show increased longevity, as do mice that lack the receptor for growth hormone. However, these animals also show changes in a number of other hormones, making it difficult to be sure that the reduction in growth hormone signaling is responsible for their increased lifespan. Now, Sun et al. have studied mutant mice that lack a gene called GHRH, which promotes the release of growth hormone. These mice, which have normal levels of all other pituitary hormones, lived for up to 50% longer than their wild-type littermates. They were more active than normal mice and had more body fat, and showed greatly increased sensitivity to insulin. Some of the changes in these mutant mice resembled those seen in animals with a restricted calorie intake, suggesting that the same mechanisms may be implicated in both. However, Sun et al. found that caloric restriction further increased the lifespans of their GHRH knockout mice, indicating that at least some of the effects of caloric restriction are independent of disrupted growth hormone signaling. The results of this study are an important step forward for understanding how growth hormone signaling and caloric restriction regulate aging, both individually and in combination. The GHRH knockout mice are likely to become an important model system for studying these processes and for understanding the complex interactions between diet and hormonal pathways. DOI:http://dx.doi.org/10.7554/eLife.01098.002
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Affiliation(s)
- Liou Y Sun
- Department of Internal Medicine , Southern Illinois University School of Medicine , Springfield , United States
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21
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Westbrook R, Bonkowski MS, Arum O, Strader AD, Bartke A. Metabolic alterations due to caloric restriction and every other day feeding in normal and growth hormone receptor knockout mice. J Gerontol A Biol Sci Med Sci 2013; 69:25-33. [PMID: 23833202 DOI: 10.1093/gerona/glt080] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Mutations causing decreased somatotrophic signaling are known to increase insulin sensitivity and extend life span in mammals. Caloric restriction and every other day (EOD) dietary regimens are associated with similar improvements to insulin signaling and longevity in normal mice; however, these interventions fail to increase insulin sensitivity or life span in growth hormone receptor knockout (GHRKO) mice. To investigate the interactions of the GHRKO mutation with caloric restriction and EOD dietary interventions, we measured changes in the metabolic parameters oxygen consumption (VO2) and respiratory quotient produced by either long-term caloric restriction or EOD in male GHRKO and normal mice. GHRKO mice had increased VO2, which was unaltered by diet. In normal mice, EOD diet caused a significant reduction in VO2 compared with ad libitum (AL) mice during fed and fasted conditions. In normal mice, caloric restriction increased both the range of VO2 and the difference in minimum VO2 between fed and fasted states, whereas EOD diet caused a relatively static VO2 pattern under fed and fasted states. No diet significantly altered the range of VO2 of GHRKO mice under fed conditions. This provides further evidence that longevity-conferring diets cause major metabolic changes in normal mice, but not in GHRKO mice.
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Affiliation(s)
- Reyhan Westbrook
- Department of Internal Medicine, Division of Geriatric Research, Southern Illinois University School of Medicine, PO Box 19628, Springfield, IL 62794-9628.
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22
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Fang Y, Westbrook R, Hill C, Boparai RK, Arum O, Spong A, Wang F, Javors MA, Chen J, Sun LY, Bartke A. Duration of rapamycin treatment has differential effects on metabolism in mice. Cell Metab 2013; 17:456-62. [PMID: 23473038 PMCID: PMC3658445 DOI: 10.1016/j.cmet.2013.02.008] [Citation(s) in RCA: 145] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Revised: 09/21/2012] [Accepted: 02/08/2013] [Indexed: 12/31/2022]
Abstract
The evolutionarily conserved target of rapamycin (TOR) signaling controls growth, metabolism, and aging. In the first robust demonstration of pharmacologically-induced life extension in mammals, longevity was extended in mice treated with rapamycin, an inhibitor of mechanistic TOR (mTOR). However, detrimental metabolic effects of rapamycin treatment were also reported, presenting a paradox of improved survival despite metabolic impairment. How rapamycin extended lifespan in mice with such paradoxical effects was unclear. Here we show that detrimental effects of rapamycin treatment were only observed during the early stages of treatment. These effects were reversed or diminished in mice treated for 20 weeks, with better metabolic profiles, increased oxygen consumption and ketogenesis, and markedly enhanced insulin sensitivity. Thus, prolonged rapamycin treatment lead to beneficial metabolic alterations, consistent with life extension previously observed. Our findings provide a likely explanation of the "rapamycin paradox" and support the potential causal importance of these metabolic alterations in longevity.
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Affiliation(s)
- Yimin Fang
- Geriatrics Laboratory, Department of Internal Medicine, Southern Illinois University School of Medicine, Springfield, IL 62794, USA.
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23
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Bartke A, Westbrook R, Sun L, Ratajczak M. Links between growth hormone and aging. Endokrynol Pol 2013; 64:46-52. [PMID: 23450447 PMCID: PMC3647466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Studies in mutant, gene knock-out and transgenic mice have demonstrated that growth hormone (GH) signalling has a major impact on ageing and longevity. Growth hormone-resistant and GH-deficient animals live much longer than their normal siblings, while transgenic mice overexpressing GH are short lived. Actions of GH in juvenile animals appear to be particularly important for life extension and responsible for various phenotypic characteristics of long-lived hypopituitary mutants. Available evidence indicates that reduced GH signalling is linked to extended longevity by multiple interacting mechanisms including increased stress resistance, reduced growth, altered profiles of cytokines produced by the adipose tissue, and various metabolic adjustments such as enhanced insulin sensitivity, increased oxygen consumption (VO2/g) and reduced respiratory quotient. The effects of removing visceral fat indicate that increased levels of adiponectin and reduced levels of pro-inflammatory cytokines in GH-resistant mice are responsible for their increased insulin sensitivity. Increased VO2 apparently represents increased energy expenditure for thermogenesis, because VO2 of mutant and normal mice does not differ at thermoneutral temperature. Recent studies identified GH- and IGF-1-dependent maintenance of bone marrow populations of very small embryonic-like stem cells (VSELs) as another likely mechanism of delayed ageing and increased longevity of GH-deficient and GH-resistant animals. Many of the physiological characteristics of long-lived, GH-related mouse mutants are shared by exceptionally long-lived people and by individuals genetically predisposed to longevity.
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Affiliation(s)
- Andrzej Bartke
- Department of Internal Medicine, Southern Illinois University School of Medicine, Springfield, IL 62794, United States.
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24
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Abstract
Genetic suppression of insulin/insulin-like growth factor signaling (IIS) can extend longevity in worms, insects, and mammals. In laboratory mice, mutations with the greatest, most consistent, and best documented positive impact on lifespan are those that disrupt growth hormone (GH) release or actions. These mutations lead to major alterations in IIS but also have a variety of effects that are not directly related to the actions of insulin or insulin-like growth factor I. Long-lived GH-resistant GHR-KO mice with targeted disruption of the GH receptor gene, as well as Ames dwarf (Prop1df) and Snell dwarf (Pit1dw) mice lacking GH (along with prolactin and TSH), are diminutive in size and have major alterations in body composition and metabolic parameters including increased subcutaneous adiposity, increased relative brain weight, small liver, hypoinsulinemia, mild hypoglycemia, increased adiponectin levels and insulin sensitivity, and reduced serum lipids. Body temperature is reduced in Ames, Snell, and female GHR-KO mice. Indirect calorimetry revealed that both Ames dwarf and GHR-KO mice utilize more oxygen per gram (g) of body weight than sex- and age-matched normal animals from the same strain. They also have reduced respiratory quotient, implying greater reliance on fats, as opposed to carbohydrates, as an energy source. Differences in oxygen consumption (VO2) were seen in animals fed or fasted during the measurements as well as in animals that had been exposed to 30% calorie restriction or every-other-day feeding. However, at the thermoneutral temperature of 30°C, VO2 did not differ between GHR-KO and normal mice. Thus, the increased metabolic rate of the GHR-KO mice, at a standard animal room temperature of 23°C, is apparently related to increased energy demands for thermoregulation in these diminutive animals. We suspect that increased oxidative metabolism combined with enhanced fatty acid oxidation contribute to the extended longevity of GHR-KO mice.
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Affiliation(s)
- Andrzej Bartke
- Division of Geriatrics Research, Department of Internal Medicine, Southern Illinois University School of Medicine Springfield, IL, USA
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Masternak MM, Bartke A, Wang F, Spong A, Gesing A, Fang Y, Salmon AB, Hughes LF, Liberati T, Boparai R, Kopchick JJ, Westbrook R. Metabolic effects of intra-abdominal fat in GHRKO mice. Aging Cell 2012; 11:73-81. [PMID: 22040032 DOI: 10.1111/j.1474-9726.2011.00763.x] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Mice with targeted deletion of the growth hormone receptor (GHRKO mice) are growth hormone (GH) resistant, small, obese, hypoinsulinemic, highly insulin sensitive and remarkably long-lived. To elucidate the unexpected coexistence of adiposity with improved insulin sensitivity and extended longevity, we examined effects of surgical removal of visceral (epididymal and perinephric) fat on metabolic traits related to insulin signaling and longevity. Comparison of results obtained in GHRKO mice and in normal animals from the same strain revealed disparate effects of visceral fat removal (VFR) on insulin and glucose tolerance, adiponectin levels, accumulation of ectopic fat, phosphorylation of insulin signaling intermediates, body temperature, and respiratory quotient (RQ). Overall, VFR produced the expected improvements in insulin sensitivity and reduced body temperature and RQ in normal mice and had opposite effects in GHRKO mice. Some of the examined parameters were altered by VFR in opposite directions in GHRKO and normal mice, and others were affected in only one genotype or exhibited significant genotype × treatment interactions. Functional differences between visceral fat of GHRKO and normal mice were confirmed by measurements of adipokine secretion, lipolysis, and expression of genes related to fat metabolism. We conclude that in the absence of GH signaling, the secretory activity of visceral fat is profoundly altered and unexpectedly promotes enhanced insulin sensitivity. The apparent beneficial effects of visceral fat in GHRKO mice may also explain why reducing adiposity by calorie restriction fails to improve insulin signaling or further extend longevity in these animals.
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Affiliation(s)
- Michal M Masternak
- College of Medicine, Burnett School of Biomedical Sciences, University of Central Florida, Orlando, FL 32827, USA.
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Gesing A, Masternak MM, Wang F, Joseph AM, Leeuwenburgh C, Westbrook R, Lewinski A, Karbownik-Lewinska M, Bartke A. Expression of key regulators of mitochondrial biogenesis in growth hormone receptor knockout (GHRKO) mice is enhanced but is not further improved by other potential life-extending interventions. J Gerontol A Biol Sci Med Sci 2011; 66:1062-76. [PMID: 21788651 DOI: 10.1093/gerona/glr080] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Mitochondrial biogenesis is essential for cell viability. Growth hormone receptor knockout (GHRKO), calorie restriction, and surgical visceral fat removal constitute experimental interventions to delay aging and increase life span. We examined the expression of known regulators of mitochondriogenesis: peroxisome proliferator-activated receptor γ co-activator 1α (PGC-1α), adenosine monophosphate (AMP)-activated protein kinase (AMPK), sirtuin-1 (SIRT-1) and sirtuin-3 (SIRT-3), endothelial nitric oxide synthase (eNOS), nuclear respiratory factor-1, mitochondrial transcription factor A (TFAM), and mitofusin-2 (MFN-2) in the skeletal muscles and hearts of control and calorie-restricted female GHRKO mice and in the kidneys of male GHRKOs after visceral fat removal or sham surgery. Expression of PGC-1α in skeletal muscles, AMPK, SIRT-1, SIRT-3, eNOS, and MFN-2 in the heart and PGC-1α, AMPK, SIRT-3, eNOS, and MFN-2 in kidneys was increased in GHRKO mice but was not affected by calorie restriction or visceral fat removal. GHRKO mice have increased expression of key regulators of mitochondriogenesis, which is not improved further by calorie restriction or visceral fat removal.
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Affiliation(s)
- Adam Gesing
- Department of Oncological Endocrinology, Medical University of Lodz, Zeligowski St., No 7/9, 90-752 Lodz, Poland.
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Westbrook R, Bonkowski MS, Strader AD, Bartke A. Alterations in oxygen consumption, respiratory quotient, and heat production in long-lived GHRKO and Ames dwarf mice, and short-lived bGH transgenic mice. J Gerontol A Biol Sci Med Sci 2009; 64:443-51. [PMID: 19286975 DOI: 10.1093/gerona/gln075] [Citation(s) in RCA: 111] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Growth hormone (GH) signaling influences longevity in mice, with decreased GH signaling associated with longer life span and increased GH signaling with shortened life span. A proposed mechanism through which GH signaling influences life span postulates that decreased GH signaling lowers metabolic rate, thus slowing aging by decreasing production of damaging free radicals. The influence of altered GH signaling on metabolism was tested by monitoring oxygen consumption (VO(2)), respiratory quotient (RQ), and heat production in long-lived GH receptor knockout (GHRKO) and Ames dwarf mice, and short-lived bovine GH-overexpressing transgenic (bGH TG) mice. Intriguingly, both GHRKO and Ames dwarf mice have increased VO(2) and heat per gram body weight, and decreased RQ, whereas bGH TG mice have decreased VO(2) and heat per gram body weight and increased RQ. In conclusion, decreased GH signaling associates with increased metabolism per body weight and may beneficially affect mitochondrial flexibility by increasing the capacity for fat oxidation; generally, GH excess produces opposite metabolic effects.
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Affiliation(s)
- Reyhan Westbrook
- Department of Internal Medicine, Division of Geriatric Research, Southern Illinois University School of Medicine, 801 North Rutledge Street, Springfield, IL 62794-9628, USA.
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Bonkowski MS, Dominici FP, Arum O, Rocha JS, Al Regaiey KA, Westbrook R, Spong A, Panici J, Masternak MM, Kopchick JJ, Bartke A. Disruption of growth hormone receptor prevents calorie restriction from improving insulin action and longevity. PLoS One 2009; 4:e4567. [PMID: 19234595 PMCID: PMC2639640 DOI: 10.1371/journal.pone.0004567] [Citation(s) in RCA: 108] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2008] [Accepted: 12/09/2008] [Indexed: 01/23/2023] Open
Abstract
Most mutations that delay aging and prolong lifespan in the mouse are related to somatotropic and/or insulin signaling. Calorie restriction (CR) is the only intervention that reliably increases mouse longevity. There is considerable phenotypic overlap between long-lived mutant mice and normal mice on chronic CR. Therefore, we investigated the interactive effects of CR and targeted disruption or knock out of the growth hormone receptor (GHRKO) in mice on longevity and the insulin signaling cascade. Every other day feeding corresponds to a mild (i.e. 15%) CR which increased median lifespan in normal mice but not in GHRKO mice corroborating our previous findings on the effects of moderate (30%) CR on the longevity of these animals. To determine why insulin sensitivity improves in normal but not GHRKO mice in response to 30% CR, we conducted insulin stimulation experiments after one year of CR. In normal mice, CR increased the insulin stimulated activation of the insulin signaling cascade (IR/IRS/PI3K/AKT) in liver and muscle. Livers of GHRKO mice responded to insulin by increased activation of the early steps of insulin signaling, which was dissipated by altered PI3K subunit abundance which putatively inhibited AKT activation. In the muscle of GHRKO mice, there was elevated downstream activation of the insulin signaling cascade (IRS/PI3K/AKT) in the absence of elevated IR activation. Further, we found a major reduction of inhibitory Ser phosphorylation of IRS-1 seen exclusively in GHRKO muscle which may underpin their elevated insulin sensitivity. Chronic CR failed to further modify the alterations in insulin signaling in GHRKO mice as compared to normal mice, likely explaining or contributing to the absence of CR effects on insulin sensitivity and longevity in these long-lived mice.
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Affiliation(s)
- Michael S. Bonkowski
- Department of Internal Medicine – Geriatrics Research, Southern Illinois University School of Medicine, Springfield, Illinois, United States of America
- Department of Pharmacology, and Physiology, Southern Illinois University School of Medicine, Springfield, Illinois, United States of America
| | - Fernando P. Dominici
- Instituto de Química y Fisicoquímica Biológicas (IQUIFIB), Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Oge Arum
- Department of Internal Medicine – Geriatrics Research, Southern Illinois University School of Medicine, Springfield, Illinois, United States of America
| | - Juliana S. Rocha
- Department of Internal Medicine – Geriatrics Research, Southern Illinois University School of Medicine, Springfield, Illinois, United States of America
- Department of Morphology, Laboratory of Cellular Biology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Khalid A. Al Regaiey
- Department of Internal Medicine – Geriatrics Research, Southern Illinois University School of Medicine, Springfield, Illinois, United States of America
- Department of Physiology, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Reyhan Westbrook
- Department of Internal Medicine – Geriatrics Research, Southern Illinois University School of Medicine, Springfield, Illinois, United States of America
| | - Adam Spong
- Department of Internal Medicine – Geriatrics Research, Southern Illinois University School of Medicine, Springfield, Illinois, United States of America
| | - Jacob Panici
- Department of Internal Medicine – Geriatrics Research, Southern Illinois University School of Medicine, Springfield, Illinois, United States of America
| | - Michal M. Masternak
- Department of Internal Medicine – Geriatrics Research, Southern Illinois University School of Medicine, Springfield, Illinois, United States of America
| | - John J. Kopchick
- Department of Biomedical Sciences, Edison Biotechnology Institute, Ohio University, Athens, Ohio, United States of America
| | - Andrzej Bartke
- Department of Internal Medicine – Geriatrics Research, Southern Illinois University School of Medicine, Springfield, Illinois, United States of America
- Department of Pharmacology, and Physiology, Southern Illinois University School of Medicine, Springfield, Illinois, United States of America
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Abstract
Transforming growth factor-beta (TGF-beta) is a multifunctional polypeptide that regulates cell growth, differentiation, and extracellular matrix formation. Studies on genetically engineered animal models have demonstrated that TGF-beta-mediated signaling pathway plays a critical role in both normal development and tumorigenesis of the breast. In pathogenesis of breast cancer, the role of TGF-beta appears featured with growth-inhibitory effects at early stages of carcinogenesis, but aggressive oncogenesis with transition to more advanced malignant states. The TGF-beta signaling pathway is also tissue-context and ligand content-dependent. Therein, therapeutic modulation of TGF-beta signaling may be a multifactorial event.
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Affiliation(s)
- Ching-Fang Chang
- Department of Medical Microbiology, Immunology, and Cell Biology, SimmonsCooper Cancer Institute, Southern Illinois University School of Medicine, Springfield, IL 62702, USA
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Abstract
We reviewed 564 consecutive psychiatric inpatient admissions. In support of previous studies, we found 51.9% to have significant medical disorders, nearly half of them "new" or previously unsuspected. Women, the elderly, substance abusers, and patients with nonschizophrenic functional psychoses had a higher prevalence of medical disorders. Using this information as a starting point, further work should be done to define a profile of the psychiatric patients at highest risk for medical illnesses.
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Abstract
A retrospective review was made of 30 patients who had failed multiple traditional surgical procedures for low-back pain, sciatic pain, or both. The most common cause of the poor results appeared to be failure of initial selection, even though all patients appeared to meet traditional indications for operative intervention. Psychosocial problems (eg, drug abuse, alcoholism, marital discord, personality disturbances) were prevalent, but were not initially recognized. Thoughtful assessment of patients being considered for initial lumbar spine surgery, which includes objective psychological testing, may reduce the incidence of unsuccessful lumbar spine surgery.
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Sandler H, McCutcheon EP, Fryer TB, Rositano S, Westbrook R, Haro P. Recent NASA contributions to biomedical telemetry. American Psychologist 1975; 30:257-64. [PMID: 1137217 DOI: 10.1037/0003-066x.30.3.257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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