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Lotfi A, Abbasi M, Karami N, Arghavanfar H, Kazeminasab F, Rosenkranz SK. Effects of treadmill training on myelin proteomic markers and cerebellum morphology in a rat model of cuprizone-induced toxic demyelination. J Neuroimmunol 2024; 387:578286. [PMID: 38215583 DOI: 10.1016/j.jneuroim.2024.578286] [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: 11/24/2023] [Revised: 01/05/2024] [Accepted: 01/06/2024] [Indexed: 01/14/2024]
Abstract
BACKGROUND Multiple sclerosis (MS) is the most common demyelinating disease of the central nervous system (CNS). If demyelination is persistent, it will result in irreversible axonal injury and loss. The purpose of the current study was to investigate the effects of treadmill training on myelin proteomic markers and cerebellum morphology in a rat model of cuprizone-induced toxic demyelination. METHODS Thirty male rats were randomly assigned to five groups (n = 6 per group), consisting of a healthy control group (Control), a cuprizone (CPZ) group, and three exercise training groups: exercise training before and during the CPZ administration (EX-CPZ-EX), exercise training before the CPZ administration (EX-CPZ), and exercise training during the CPZ administration (CPZ-EX). A rat model of CPZ-induced toxic demyelination consisted of feeding the rats cuprizone pellets (0.2%) for 6 weeks. All exercise groups performed a treadmill training protocol 5 days/week for 6 weeks. Levels of Myelin proteolipid protein (PLP), Myelin oligodendrocyte glycoprotein (MOG), axonal injury in the cerebellar tissue, and volume, weight, and length of the cerebellum were determined. RESULTS Results indicated a significant decrease in PLP and MOG in the CPZ groups compared to the Control group (****p < 0.0001). There was a significant increase in PLP and MOG and a significant decrease in axonal injury in the EX-CPZ-EX group as compared to other CPZ groups (****p < 0.0001), and CPZ-MS and CPZ-EX were not significantly different from one another. However, there were no significant differences between the groups for the volume, weight, or length of the cerebellum. CONCLUSION Treadmill training improved myelin sheath structural proteins and axonal injury in cerebellar tissue in a rat model of CPZ-induced toxic demyelination.
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Affiliation(s)
- Alireza Lotfi
- Department of Exercise Physiology, Ilam Branch, Islamic Azad University, Ilam, Iran
| | - Maryam Abbasi
- Department of Exercise Physiology, Ilam Branch, Islamic Azad University, Ilam, Iran.
| | - Nasrin Karami
- Department of Exercise Physiology, Ilam Branch, Islamic Azad University, Ilam, Iran
| | - Hadis Arghavanfar
- Department of Exercise Physiology, Ilam Branch, Islamic Azad University, Ilam, Iran
| | - Fatemeh Kazeminasab
- Department of Physical Education and Sport Sciences, Faculty of Humanities, University of Kashan, Kashan, Iran
| | - Sara K Rosenkranz
- Department of Kinesiology and Nutrition Sciences, School of Integrated Health Sciences, University of Nevada Las Vegas, Las Vegas, NV, USA
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Luthra NS, Christou DD, Clow A, Corcos DM. Targeting neuroendocrine abnormalities in Parkinson's disease with exercise. Front Neurosci 2023; 17:1228444. [PMID: 37746149 PMCID: PMC10514367 DOI: 10.3389/fnins.2023.1228444] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 08/22/2023] [Indexed: 09/26/2023] Open
Abstract
Parkinson's Disease (PD) is a prevalent and complex age-related neurodegenerative condition for which there are no disease-modifying treatments currently available. The pathophysiological process underlying PD remains incompletely understood but increasing evidence points to multiple system dysfunction. Interestingly, the past decade has produced evidence that exercise not only reduces signs and symptoms of PD but is also potentially neuroprotective. Characterizing the mechanistic pathways that are triggered by exercise and lead to positive outcomes will improve understanding of how to counter disease progression and symptomatology. In this review, we highlight how exercise regulates the neuroendocrine system, whose primary role is to respond to stress, maintain homeostasis and improve resilience to aging. We focus on a group of hormones - cortisol, melatonin, insulin, klotho, and vitamin D - that have been shown to associate with various non-motor symptoms of PD, such as mood, cognition, and sleep/circadian rhythm disorder. These hormones may represent important biomarkers to track in clinical trials evaluating effects of exercise in PD with the aim of providing evidence that patients can exert some behavioral-induced control over their disease.
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Affiliation(s)
- Nijee S. Luthra
- Department of Neurology, University of California, San Francisco, San Francisco, CA, United States
| | - Demetra D. Christou
- Department of Applied Physiology and Kinesiology, College of Health and Human Performance, University of Florida, Gainesville, FL, United States
| | - Angela Clow
- Department of Psychology, School of Social Sciences, University of Westminster, London, United Kingdom
| | - Daniel M. Corcos
- Department of Physical Therapy and Human Movement Sciences, Feinberg School of Medicine, McCormick School of Engineering, Northwestern University, Chicago, IL, United States
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Carreras-Badosa G, Puerto-Carranza E, Mas-Parés B, Gómez-Vilarrubla A, Gómez-Herrera B, Díaz-Roldán F, Riera-Pérez E, de Zegher F, Ibañez L, Bassols J, López-Bermejo A. Higher levels of serum α-Klotho are longitudinally associated with less central obesity in girls experiencing weight gain. Front Endocrinol (Lausanne) 2023; 14:1218949. [PMID: 37522130 PMCID: PMC10382686 DOI: 10.3389/fendo.2023.1218949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 06/27/2023] [Indexed: 08/01/2023] Open
Abstract
Introduction Klotho is an anti-aging protein that reduces adiposity and increases caloric expenditure, among others. Although associations between secreted α-Klotho levels and obesity have been described, its relationship with central obesity and visceral fat accumulation during childhood is poorly understood. Our objective was to study the longitudinal associations between serum α-Klotho concentrations and obesity-related parameters in apparently healthy children. Subjects and methods We studied a cohort of 208 apparently healthy school-age children (107 girls and 101 boys) assessed at baseline (mean age 8.5 ± 1.8 years) and at follow-up 4 years later. Serum α-Klotho concentrations were measured at baseline in all subjects. Obesity-related parameters, such as BMI, waist circumference, body fat, visceral fat, triglyceride levels, HOMA-IR index, and C-reactive protein were studied. Boys and girls were classified into 3 groups according to weight change between baseline and follow-up visits: weight loss, stable weight, or weight gain (based on a BMI-SDS change cut-off > 0.35 SD). Results In girls (N=107), but not in boys, we observed negative associations of serum α-Klotho protein with BMI, waist circumference, body fat, visceral fat, HOMA IR index, and C-reactive protein at baseline and also at follow-up. The associations of α-Klotho and obesity-related parameters were more evident in girls who exhibited weight gain. In such girls, multivariate regression analyses (adjusting for age, puberty and baseline weight/height ratio) showed that α-Klotho protein was negatively associated with follow-up BMI, waist circumference, and visceral fat (p = 0.003 to 0.028). For each 1 SD-increase in baseline α-Klotho, follow-up waist circumference decreased by 4.15 cm and visceral fat by 1.38 mm. Conclusions In school-age girls, serum α-Klotho concentrations are longitudinally related to a more favorable metabolic profile. In girls experiencing weight gain, α-Klotho may prove to be a protective factor against the accumulation of visceral fat.
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Affiliation(s)
| | | | - Berta Mas-Parés
- Pediatric Endocrinology Group, Girona Biomedical Research Institute, Girona, Spain
| | | | | | | | | | - Francis de Zegher
- Department of Development & Regeneration, University of Leuven, Leuven, Belgium
| | - Lourdes Ibañez
- Sant Joan de Déu Children’s Hospital Pediatric Research Institute, University of Barcelona, Barcelona, Spain
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas, Instituto de Salud Carlos III, Madrid, Spain
| | - Judit Bassols
- Maternal-Fetal Metabolic Group, Girona Biomedical Research Institute, Girona, Spain
| | - Abel López-Bermejo
- Pediatric Endocrinology Group, Girona Biomedical Research Institute, Girona, Spain
- Pediatrics, Dr. JosepTrueta Hospital, Girona, Spain
- Department of Medical Sciences, University of Girona, Girona, Spain
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Serum klotho concentrations in older men with hypertension or type 2 diabetes during prolonged exercise in temperate and hot conditions. Eur J Appl Physiol 2023:10.1007/s00421-023-05171-x. [PMID: 36929016 DOI: 10.1007/s00421-023-05171-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 02/27/2023] [Indexed: 03/18/2023]
Abstract
PURPOSE Klotho is a cytoprotective protein that increases during acute physiological stressors (e.g., exercise heat stress), although age-related declines in klotho may underlie cellular vulnerability to heat stress. The present study aimed to compare serum klotho in healthy older men and men with type 2 diabetes (T2D) or hypertension (HTN) during prolonged exercise in temperate or hot conditions. METHODS We evaluated serum klotho in 12 healthy older men (mean [SD]; 59 years [4]), 10 men with HTN (60 years [4]), and 9 men with T2D (60 years [5]) before and after 180 min of moderate-intensity (fixed metabolic rate of 200 W/m2; ~ 3.4 METs) exercise and 60 min of recovery in temperate (wet-bulb globe temperature (WBGT) 16 °C) and hot (WBGT 32 °C) environments. Core temperature (rectal), heart rate (HR), and heart rate reserve (HRR) were measured continuously while klotho was measured at the end of baseline, exercise, and recovery. RESULTS Total exercise duration was reduced during the hot condition in older men with HTN and T2D than healthy older men (both p ≤ 0.049), despite similar core temperatures, HR, and HRR. Klotho was higher than rest following exercise in the heat in healthy older men (+ 191 pg/mL [189]; p < 0.001) and responses were greater (p = 0.036) than men with HTN (+ 118 pg/mL [49]; p = 0.030), although klotho did not increase in men with T2D (+ 4 pg/mL [71]; p ≥ 0.638). CONCLUSION Given klotho's role in cytoprotection, older men with HTN and especially T2D may be at increased cellular vulnerability to prolonged exercise or physically demanding exercise in the heat.
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Ercan Z, Deniz G, Yentur SB, Arikan FB, Karatas A, Alkan G, Koca SS. Effects of acute aerobic exercise on cytokines, klotho, irisin, and vascular endothelial growth factor responses in rheumatoid arthritis patients. Ir J Med Sci 2023; 192:491-497. [PMID: 35296975 DOI: 10.1007/s11845-022-02970-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 03/09/2022] [Indexed: 02/04/2023]
Abstract
BACKGROUND Rheumatoid arthritis (RA) is a chronic inflammatory joint disease that causes cartilage and bone damage as well as disability. AIMS : The aim of this study was to examine the effects of acute aerobic exercise on cytokines such as serum interleukin-6 (IL-6), interleukin-1β (IL-1β), Tumor Necrosis Factor-α (TNF-α) and irisin, vascular endothelial growth factor(VEGF) and klotho in RA patients. METHODS: Forty RA patient and 40 healthy volunteers of the same age participated in this study. All participants walked on the treadmill for 30 minutes at 60-80% of maximal heart rate. Blood samples were taken before and immediately after the exercise. Serum levels of IL-6, IL1β, TNF-α and irisin, VEGF and klotho were measured by enzyme-linked immunosorbent analysis. RESULTS: Baseline levels of inflammatory cytokines, irisin, VEGF and klotho were found to be higher in RA patients compared to the control group. In both groups, there was an increase in serum klotho levels after exercise compared to baseline (p<0.05), while a decrease in IL1β, TNF-α levels were observed. While serum VEGF level decreased in RA group, it increased in the control group(p<0.05). Irisin levels decreased in both groups. IL-6 level did not change in the control group, while it increased in RA group. A single exercise session had an acute anti-inflammatory effect in RA patients. CONCLUSION It can be concluded that acute aerobic exercise can be beneficial for patients with RA through cytokine, irisin, klotho and VEGF levels, and also it can be safely implemented to the RA rehabilitation program for additional anti-inflammatory effects. Trial registration ClinicalTrials.gov: NCT04439682.
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Affiliation(s)
- Zubeyde Ercan
- Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Firat University, Elazig, Turkey.
| | - Gulnihal Deniz
- Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Erzurum Technical University, Erzurum, Turkey
| | - Songül Baglan Yentur
- Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Firat University, Elazig, Turkey
| | - Funda Bulut Arikan
- Department of Physiology, Faculty of Medicine, Kirikkale University, Kirikkale, Turkey
| | - Ahmet Karatas
- Department of Rheumatology, Faculty of Medicine, Firat University, Elazig, Turkey
| | - Gokhan Alkan
- Department of Physical Therapy and Rehabilitation, Faculty of Medicine, Firat University, Elazig, Turkey
| | - Suleyman Serdar Koca
- Department of Rheumatology, Faculty of Medicine, Firat University, Elazig, Turkey
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Luthra NS, Clow A, Corcos DM. The Interrelated Multifactorial Actions of Cortisol and Klotho: Potential Implications in the Pathogenesis of Parkinson's Disease. Brain Sci 2022; 12:1695. [PMID: 36552155 PMCID: PMC9775285 DOI: 10.3390/brainsci12121695] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 12/06/2022] [Accepted: 12/07/2022] [Indexed: 12/14/2022] Open
Abstract
The pathogenesis of Parkinson's disease (PD) is complex, multilayered, and not fully understood, resulting in a lack of effective disease-modifying treatments for this prevalent neurodegenerative condition. Symptoms of PD are heterogenous, including motor impairment as well as non-motor symptoms such as depression, cognitive impairment, and circadian disruption. Aging and stress are important risk factors for PD, leading us to explore pathways that may either accelerate or protect against cellular aging and the detrimental effects of stress. Cortisol is a much-studied hormone that can disrupt mitochondrial function and increase oxidative stress and neuroinflammation, which are recognized as key underlying disease mechanisms in PD. The more recently discovered klotho protein, considered a general aging-suppressor, has a similarly wide range of actions but in the opposite direction to cortisol: promoting mitochondrial function while reducing oxidative stress and inflammation. Both hormones also converge on pathways of vitamin D metabolism and insulin resistance, also implicated to play a role in PD. Interestingly, aging, stress and PD associate with an increase in cortisol and decrease in klotho, while physical exercise and certain genetic variations lead to a decrease in cortisol response and increased klotho. Here, we review the interrelated opposite actions of cortisol and klotho in the pathogenesis of PD. Together they impact powerful and divergent mechanisms that may go on to influence PD-related symptoms. Better understanding of these hormones in PD would facilitate the design of effective interventions that can simultaneously impact the multiple systems involved in the pathogenesis of PD.
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Affiliation(s)
- Nijee S. Luthra
- Department of Neurology, University of California San Francisco, San Francisco, CA 94127, USA
| | - Angela Clow
- Department of Psychology, School of Social Sciences, University of Westminster, London W1B 2HW, UK
| | - Daniel M. Corcos
- Department of Physical Therapy & Human Movement Sciences, Feinberg School of Medicine, Northwestern University, Chicago, IL 60208, USA
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Prud’homme GJ, Kurt M, Wang Q. Pathobiology of the Klotho Antiaging Protein and Therapeutic Considerations. FRONTIERS IN AGING 2022; 3:931331. [PMID: 35903083 PMCID: PMC9314780 DOI: 10.3389/fragi.2022.931331] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 06/06/2022] [Indexed: 12/06/2022]
Abstract
The α-Klotho protein (henceforth denoted Klotho) has antiaging properties, as first observed in mice homozygous for a hypomorphic Klotho gene (kl/kl). These mice have a shortened lifespan, stunted growth, renal disease, hyperphosphatemia, hypercalcemia, vascular calcification, cardiac hypertrophy, hypertension, pulmonary disease, cognitive impairment, multi-organ atrophy and fibrosis. Overexpression of Klotho has opposite effects, extending lifespan. In humans, Klotho levels decline with age, chronic kidney disease, diabetes, Alzheimer’s disease and other conditions. Low Klotho levels correlate with an increase in the death rate from all causes. Klotho acts either as an obligate coreceptor for fibroblast growth factor 23 (FGF23), or as a soluble pleiotropic endocrine hormone (s-Klotho). It is mainly produced in the kidneys, but also in the brain, pancreas and other tissues. On renal tubular-cell membranes, it associates with FGF receptors to bind FGF23. Produced in bones, FGF23 regulates renal excretion of phosphate (phosphaturic effect) and vitamin D metabolism. Lack of Klotho or FGF23 results in hyperphosphatemia and hypervitaminosis D. With age, human renal function often deteriorates, lowering Klotho levels. This appears to promote age-related pathology. Remarkably, Klotho inhibits four pathways that have been linked to aging in various ways: Transforming growth factor β (TGF-β), insulin-like growth factor 1 (IGF-1), Wnt and NF-κB. These can induce cellular senescence, apoptosis, inflammation, immune dysfunction, fibrosis and neoplasia. Furthermore, Klotho increases cell-protective antioxidant enzymes through Nrf2 and FoxO. In accord, preclinical Klotho therapy ameliorated renal, cardiovascular, diabetes-related and neurodegenerative diseases, as well as cancer. s-Klotho protein injection was effective, but requires further investigation. Several drugs enhance circulating Klotho levels, and some cross the blood-brain barrier to potentially act in the brain. In clinical trials, increased Klotho was noted with renin-angiotensin system inhibitors (losartan, valsartan), a statin (fluvastatin), mTOR inhibitors (rapamycin, everolimus), vitamin D and pentoxifylline. In preclinical work, antidiabetic drugs (metformin, GLP-1-based, GABA, PPAR-γ agonists) also enhanced Klotho. Several traditional medicines and/or nutraceuticals increased Klotho in rodents, including astaxanthin, curcumin, ginseng, ligustilide and resveratrol. Notably, exercise and sport activity increased Klotho. This review addresses molecular, physiological and therapeutic aspects of Klotho.
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Affiliation(s)
- Gérald J. Prud’homme
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
- Department of Laboratory Medicine, Keenan Research Centre for Biomedical Science, Unity Health Toronto, Toronto, ON, Canada
- *Correspondence: Gérald J. Prud’homme,
| | - Mervé Kurt
- Department of Laboratory Medicine, Keenan Research Centre for Biomedical Science, Unity Health Toronto, Toronto, ON, Canada
| | - Qinghua Wang
- Department of Endocrinology and Metabolism, Huashan Hospital, Shanghai Medical School, Fudan University, Shanghai, China
- Shanghai Yinuo Pharmaceutical Co., Ltd., Shanghai, China
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Rahimpour Z, Hoseini R, Behpour N. Effect of Short-term Vitamin D Supplementation on the Alterations of Glycemic Variables in Response to Exhaustive Eccentric Exercise in Patients with Non-alcoholic Fatty Liver. Middle East J Dig Dis 2022; 14:229-234. [PMID: 36619147 PMCID: PMC9489312 DOI: 10.34172/mejdd.2022.277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 02/19/2022] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND: Exhaustive eccentric exercise (EEE), along with a positive role in weight loss and physiological adaptation, increases liver enzymes and disturbs glucose homeostasis. Many studies have been considered to neutralize the adverse effects of EEE, including vitamin D (Vit D) supplementation. The present study aimed to investigate the effect of short-term Vit D supplementation on the alteration of glycemic variables in response to EEE in patients with non-alcoholic fatty liver disease (NAFLD). METHODS: In this clinical trial, 22 overweight women with NAFLD were randomly assigned to control (C; n=11) and experimental (Exp; n=11) groups. C group received a lactose placebo daily with the same color, shape, and warmth percentage; Exp group received 2000 IU of Vit D daily for 6 weeks (42 days). Blood samples were taken to measure the liver enzymes, lipid profile, and Vit D levels alteration at four stages: Pre1(before the first EEE session), post 1 (after the first EEE session), pre 2 (before the second EEE session), and post 2 (after the second EEE session). Repeated measures ANOVA and independent t test were used to analyze the data using SPSS software (version 26) at a significance level of P < 0.05. RESULTS: The results show a significant increase in glucose, insulin, and homeostatic model assessment for insulin resistance (HOMA-IR) levels in both C and Exp groups following the EEE (comparing pre 1 and post 1). Also, after 6 weeks of Vit D supplementation, glucose, insulin, and HOMA-IR increased significantly in both C (P = 0.001, P = 0.001, and P = 0.001, respectively) and Exp (P = 0.001, P = 0.001, and P = 0.001, respectively) groups following EEE (comparison of pre 2 and post 2). However, these increases were significantly lower in Exp group compared with the C group (comparing post 2). CONCLUSION: Short-term Vit D supplementation downregulates the increased glucose, insulin, and insulin resistance induced by EEE in patients with NAFLD.
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Affiliation(s)
- Zahra Rahimpour
- MSc of Exercise Physiology, Department of Exercise Physiology, Faculty of Sport Sciences, Razi University, Kermanshah, Iran
| | - Rastegar Hoseini
- Assistant Professor of Exercise Physiology, Department of Exercise Physiology, Faculty of Sport Sciences, Razi University, Kermanshah, Iran,Corresponding Author: Rastegar Hoseini, PhD Department of Exercise Physiology, Faculty of Sport Sciences, Razi University, Kermanshah, Iran, P.O.Box. 6714414971 Tel: + 98 83 34283267 Fax: + 98 83 34279245
| | - Nasser Behpour
- Associate Professor of Exercise Physiology, Department of Exercise Physiology, Faculty of Sport Sciences, Razi University, Kermanshah, Iran
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Arroyo E, Troutman AD, Moorthi RN, Avin KG, Coggan AR, Lim K. Klotho: An Emerging Factor With Ergogenic Potential. FRONTIERS IN REHABILITATION SCIENCES 2022; 2:807123. [PMID: 36188832 PMCID: PMC9397700 DOI: 10.3389/fresc.2021.807123] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 12/10/2021] [Indexed: 11/13/2022]
Abstract
Sarcopenia and impaired cardiorespiratory fitness are commonly observed in older individuals and patients with chronic kidney disease (CKD). Declines in skeletal muscle function and aerobic capacity can progress into impaired physical function and inability to perform activities of daily living. Physical function is highly associated with important clinical outcomes such as hospitalization, functional independence, quality of life, and mortality. While lifestyle modifications such as exercise and dietary interventions have been shown to prevent and reverse declines in physical function, the utility of these treatment strategies is limited by poor widespread adoption and adherence due to a wide variety of both perceived and actual barriers to exercise. Therefore, identifying novel treatment targets to manage physical function decline is critically important. Klotho, a remarkable protein with powerful anti-aging properties has recently been investigated for its role in musculoskeletal health and physical function. Klotho is involved in several key processes that regulate skeletal muscle function, such as muscle regeneration, mitochondrial biogenesis, endothelial function, oxidative stress, and inflammation. This is particularly important for older adults and patients with CKD, which are known states of Klotho deficiency. Emerging data support the existence of Klotho-related benefits to exercise and for potential Klotho-based therapeutic interventions for the treatment of sarcopenia and its progression to physical disability. However, significant gaps in our understanding of Klotho must first be overcome before we can consider its potential ergogenic benefits. These advances will be critical to establish the optimal approach to future Klotho-based interventional trials and to determine if Klotho can regulate physical dysfunction.
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Affiliation(s)
- Eliott Arroyo
- Division of Nephrology & Hypertension, Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Ashley D. Troutman
- Department of Physical Therapy, School of Health and Human Sciences, Indiana University Purdue University, Indianapolis, IN, United States
| | - Ranjani N. Moorthi
- Division of Nephrology & Hypertension, Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Keith G. Avin
- Division of Nephrology & Hypertension, Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, United States
- Department of Physical Therapy, School of Health and Human Sciences, Indiana University Purdue University, Indianapolis, IN, United States
| | - Andrew R. Coggan
- Department of Kinesiology, School of Health and Human Sciences, Indiana University Purdue University Indianapolis, Indianapolis, IN, United States
| | - Kenneth Lim
- Division of Nephrology & Hypertension, Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, United States
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Effect of combined aerobic and resistance exercise on serum Klotho secretion in healthy young men -a pilot study-. Curr Res Physiol 2022; 5:246-250. [PMID: 35756695 PMCID: PMC9218281 DOI: 10.1016/j.crphys.2022.06.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 05/28/2022] [Accepted: 06/08/2022] [Indexed: 11/21/2022] Open
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Morishima T, Ochi E. Impact of a single bout of resistance exercise on serum Klotho in healthy young men. Physiol Rep 2021; 9:e15087. [PMID: 34713986 PMCID: PMC8554772 DOI: 10.14814/phy2.15087] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 10/05/2021] [Accepted: 10/06/2021] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND It has been shown that Klotho protects vascular endothelial function. Given that a single bout of resistance-exercise-induced hypertensive stimulus causes endothelial dysfunction, we postulated that acute resistance exercise would reduce serum Klotho levels. In this respect, the reduction in serum Klotho levels would be associated with the response of flow-mediated dilation (FMD). Therefore, the purpose of this study was to investigate the impact of acute resistance exercise on the Klotho response in serum. In addition, we examined the relationship between the serum Klotho and FMD responses following acute resistance exercise. METHODS Twelve untrained men participated in this study (20.4 ± 0.3 years). Following baseline measurements (blood pressure, blood collection, FMD), subjects performed leg extensions, which consisted of 10 repetitions for five sets at 70% of one-repetition maximum. After the exercise, measurement of blood pressure, blood collection, and FMD assessment were repeated for 60 min. We analyzed Klotho and endothelin-1 (ET-1) concentrations in blood serum. RESULTS As expected, the exercise significantly elevated blood pressure and led to decreased FMD (p < 0.05). However, Klotho concentrations were significantly increased following exercise (p < 0.05). No correlation was observed in Klotho and FMD responses following acute resistance exercise. However, there was a significant positive correlation between Klotho and ET-1 in response to resistance exercise (p < 0.05). CONCLUSION In conclusion, the present study reveals that serum Klotho significantly increased following a single bout of resistance exercise. However, the increase in Klotho may not associate with the acute reduction in endothelial function.
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Affiliation(s)
| | - Eisuke Ochi
- Faculty of Bioscience and Applied ChemistryHosei UniversityTokyoJapan
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Iturriaga T, Yvert T, Sanchez-Lorente IM, Diez-Vega I, Fernandez-Elias VE, Sanchez-Barroso L, Dominguez-Balmaseda D, Larrosa M, Perez-Ruiz M, Santiago C. Acute Impacts of Different Types of Exercise on Circulating α-Klotho Protein Levels. Front Physiol 2021; 12:716473. [PMID: 34539440 PMCID: PMC8440965 DOI: 10.3389/fphys.2021.716473] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 08/03/2021] [Indexed: 11/13/2022] Open
Abstract
Introduction: Elevated plasma α-klotho (αKl) protects against several ageing phenotypes and has been proposed as a biomarker of a good prognosis for different diseases. The beneficial health effects of elevated plasma levels of soluble αKl (SαKl) have been likened to the positive effects of exercise on ageing and chronic disease progression. It has also been established that molecular responses and adaptations differ according to exercise dose. The aim of this study is to compare the acute SαKl response to different exercise interventions, cardiorespiratory, and strength exercise in healthy, physically active men and to examine the behavior of SαKl 72h after acute strength exercise. Methods: In this quasi-experimental study, plasma SαKl was measured before and after a cardiorespiratory exercise session (CR) in 43 men, and strength exercise session (ST) in 39 men. The behavior of SαKl was also examined 24, 48, and 72h after ST. Results: Significant differences (time×group) were detected in SαKl levels (p=0.001; d=0.86) between CR and ST. After the ST intervention, SαKl behavior varied significantly (p=0.009; d=0.663) in that levels dropped between pre- and post-exercises (p=0.025; d=0.756) and were also significantly higher compared to pre ST values at 24h (p=0.033; d=0.717) and at 48h (p=0.015; d=0.827). Conclusions: SαKl levels increased in response to a single bout of cardiorespiratory exercise; while they decreased immediately after strength exercise, levels were elevated after 24h indicating different klotho protein responses to different forms of exercise.
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Affiliation(s)
- Tamara Iturriaga
- Faculty of Physical Activity, Sport Sciences and Physiotherapy, Universidad Europea de Madrid, Madrid, Spain
| | - Thomas Yvert
- Faculty of Physical Activity, Sport Sciences and Physiotherapy, Universidad Europea de Madrid, Madrid, Spain
| | - Isabel M Sanchez-Lorente
- Faculty of Physical Activity, Sport Sciences and Physiotherapy, Universidad Europea de Madrid, Madrid, Spain
| | - Ignacio Diez-Vega
- Faculty of Physical Activity, Sport Sciences and Physiotherapy, Universidad Europea de Madrid, Madrid, Spain.,Departamento de Enfermería y Fisioterapia, Facultad de Ciencias de la salud, Universidad de Leon, Ponferrada, Spain
| | - Valentin E Fernandez-Elias
- Faculty of Physical Activity, Sport Sciences and Physiotherapy, Universidad Europea de Madrid, Madrid, Spain
| | - Lara Sanchez-Barroso
- Facultad de Enfermería, Fisioterapia y Podología, Universidad Complutense de Madrid, Madrid, Spain.,Faculty of Biomedical and Health Sciences, Universidad Europea de Madrid, Madrid, Spain
| | - Diego Dominguez-Balmaseda
- Faculty of Physical Activity, Sport Sciences and Physiotherapy, Universidad Europea de Madrid, Madrid, Spain
| | - Mar Larrosa
- Faculty of Biomedical and Health Sciences, Universidad Europea de Madrid, Madrid, Spain
| | - Margarita Perez-Ruiz
- Faculty of Physical Activity, Sport Sciences and Physiotherapy, Universidad Europea de Madrid, Madrid, Spain.,Servicio de Medicina Física y Rehabilitación, Hospital General Universitario Gregorio Marañón, Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
| | - Catalina Santiago
- Faculty of Physical Activity, Sport Sciences and Physiotherapy, Universidad Europea de Madrid, Madrid, Spain
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13
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Alavi SS, Joukar S, Rostamzadeh F, Najafipour H, Darvishzadeh-mahani F, Mortezaeizade A. Involvement of Sirtuins and Klotho in Cardioprotective Effects of Exercise Training Against Waterpipe Tobacco Smoking-Induced Heart Dysfunction. Front Physiol 2021; 12:680005. [PMID: 34354599 PMCID: PMC8329540 DOI: 10.3389/fphys.2021.680005] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 05/24/2021] [Indexed: 01/06/2023] Open
Abstract
Despite its negative effect on the cardiovascular system, waterpipe smoking (WPS) is currently popular worldwide, especially among youth. This study investigated the effects of moderate endurance exercise on heart function of rats exposed to WPS and its possible mechanism. The animals were randomly divided into four groups: control group (CTL), the exercise group (Ex) which trained for 8 weeks, the waterpipe tobacco smoking group (S) exposed to smoke inhalation (30 min per day, 5 days each week, for 8 weeks), and the group that did exercise training and received waterpipe tobacco smoke inhalation together (Ex + S). One day after the last session of Ex and WPS, cardiac pressures and functional indices were recorded and calculated. The levels of SIRT1, SIRT3, Klotho, Bax, and Bcl-2 in the serum and heart, the expression of phosphorylated GSK3β of heart tissue, and cardiac histopathological changes were assessed. WPS reduced systolic pressure, +dP/dt max, -dP/dt max, and heart contractility indices (P < 0.001 vs. CTL) and increased cardiac tissue lesions (P < 0.05 vs. CTL) and end diastolic pressure and Tau index (P < 0.001 vs. CTL) of the left ventricle. Exercise training normalized the left ventricular end diastolic pressure, +dP/dt max, and contractility index. Also, exercise improved the levels of SIRT1, SIRT3, Klotho, and Bcl-2 and reduced Bax level in the heart. The findings showed that WPS causes left ventricular dysfunction. Moderate exercise prevented WPS-induced heart dysfunction partly through its anti-apoptotic features and activation of the sirtuins and Klotho pathways.
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Affiliation(s)
- Samaneh Sadat Alavi
- Neuroscience Research Center, Institute of Neuropharmacology and Cardiovascular Research Center, Institute of Basic and Clinical Physiology Sciences and Department of Physiology and Pharmacology, Afzalipour School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Siyavash Joukar
- Cardiovascular Research Center, Institute of Basic and Clinical Physiology Sciences and Department of Physiology and Pharmacology, Afzalipour School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Farzaneh Rostamzadeh
- Physiology Research Center, Institute of Basic and Clinical Physiology Sciences, Kerman University of Medical Sciences, Kerman, Iran
| | - Hamid Najafipour
- Physiology Research Center, Institute of Basic and Clinical Physiology Sciences, Kerman University of Medical Sciences, Kerman, Iran
| | - Fatemeh Darvishzadeh-mahani
- Neuroscience Research Center, Institute of Neuropharmacology and Cardiovascular Research Center, Institute of Basic and Clinical Physiology Sciences and Department of Physiology and Pharmacology, Afzalipour School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Abbas Mortezaeizade
- Pathology and Stem Cell Research Center, Kerman University of Medical Sciences, Kerman, Iran
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14
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Hanson K, Fisher K, Hooper N. Exploiting the neuroprotective effects of α-klotho to tackle ageing- and neurodegeneration-related cognitive dysfunction. Neuronal Signal 2021; 5:NS20200101. [PMID: 34194816 PMCID: PMC8204227 DOI: 10.1042/ns20200101] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 05/24/2021] [Accepted: 05/25/2021] [Indexed: 12/26/2022] Open
Abstract
Cognitive dysfunction is a key symptom of ageing and neurodegenerative disorders, such as Alzheimer's disease (AD). Strategies to enhance cognition would impact the quality of life for a significant proportion of the ageing population. The α-klotho protein may protect against cognitive decline through multiple mechanisms: such as promoting optimal synaptic function via activation of N-methyl-d-aspartate (NMDA) receptor signalling; stimulating the antioxidant defence system; reducing inflammation; promoting autophagy and enhancing clearance of amyloid-β. However, the molecular and cellular pathways by which α-klotho mediates these neuroprotective functions have yet to be fully elucidated. Key questions remain unanswered: which form of α-klotho (transmembrane, soluble or secreted) mediates its cognitive enhancing properties; what is the neuronal receptor for α-klotho and which signalling pathways are activated by α-klotho in the brain to enhance cognition; how does peripherally administered α-klotho mediate neuroprotection; and what is the molecular basis for the beneficial effect of the VS variant of α-klotho? In this review, we summarise the recent research on neuronal α-klotho and discuss how the neuroprotective properties of α-klotho could be exploited to tackle age- and neurodegeneration-associated cognitive dysfunction.
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Affiliation(s)
- Kelsey Hanson
- Division of Neuroscience and Experimental Psychology, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, U.K
| | - Kate Fisher
- Division of Neuroscience and Experimental Psychology, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, U.K
| | - Nigel M. Hooper
- Division of Neuroscience and Experimental Psychology, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, U.K
- Geoffrey Jefferson Brain Research Centre, Manchester Academic Health Science Centre, Northern Care Alliance and University of Manchester, Manchester, U.K
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15
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Gaitán JM, Moon HY, Stremlau M, Dubal DB, Cook DB, Okonkwo OC, van Praag H. Effects of Aerobic Exercise Training on Systemic Biomarkers and Cognition in Late Middle-Aged Adults at Risk for Alzheimer's Disease. Front Endocrinol (Lausanne) 2021; 12:660181. [PMID: 34093436 PMCID: PMC8173166 DOI: 10.3389/fendo.2021.660181] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 04/30/2021] [Indexed: 12/11/2022] Open
Abstract
Increasing evidence indicates that physical activity and exercise training may delay or prevent the onset of Alzheimer's disease (AD). However, systemic biomarkers that can measure exercise effects on brain function and that link to relevant metabolic responses are lacking. To begin to address this issue, we utilized blood samples of 23 asymptomatic late middle-aged adults, with familial and genetic risk for AD (mean age 65 years old, 50% female) who underwent 26 weeks of supervised treadmill training. Systemic biomarkers implicated in learning and memory, including the myokine Cathepsin B (CTSB), brain-derived neurotrophic factor (BDNF), and klotho, as well as metabolomics were evaluated. Here we show that aerobic exercise training increases plasma CTSB and that changes in CTSB, but not BDNF or klotho, correlate with cognitive performance. BDNF levels decreased with exercise training. Klotho levels were unchanged by training, but closely associated with change in VO2peak. Metabolomic analysis revealed increased levels of polyunsaturated free fatty acids (PUFAs), reductions in ceramides, sphingo- and phospholipids, as well as changes in gut microbiome metabolites and redox homeostasis, with exercise. Multiple metabolites (~30%) correlated with changes in BDNF, but not CSTB or klotho. The positive association between CTSB and cognition, and the modulation of lipid metabolites implicated in dementia, support the beneficial effects of exercise training on brain function. Overall, our analyses indicate metabolic regulation of exercise-induced plasma BDNF changes and provide evidence that CTSB is a marker of cognitive changes in late middle-aged adults at risk for dementia.
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Affiliation(s)
- Julian M. Gaitán
- Wisconsin Alzheimer’s Disease Research Center and Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - Hyo Youl Moon
- Lab of Neurosciences, National Institute on Aging (NIA), Baltimore, MD, United States
- Department of Education, Seoul National University, Seoul, South Korea
- Institute of Sport Science, Seoul National University, Seoul, South Korea
- Institute on Aging, Seoul National University, Seoul, South Korea
| | - Matthew Stremlau
- Lab of Neurosciences, National Institute on Aging (NIA), Baltimore, MD, United States
| | - Dena B. Dubal
- Department of Neurology and Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, CA, United States
| | - Dane B. Cook
- Department of Kinesiology, University of Wisconsin School of Education, Madison, WI, United States
- Research Service, William S. Middleton Memorial Veterans Hospital, Madison, WI, United States
| | - Ozioma C. Okonkwo
- Wisconsin Alzheimer’s Disease Research Center and Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
- Geriatric Research Education and Clinical Center, William S. Middleton Memorial Veterans Hospital, Madison, WI, United States
- Wisconsin Alzheimer’s Institute, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - Henriette van Praag
- Lab of Neurosciences, National Institute on Aging (NIA), Baltimore, MD, United States
- Brain Institute and Charles E. Schmidt College of Medicine, Florida Atlantic University, Jupiter, FL, United States
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16
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Exercise intensity regulates cytokine and klotho responses in men. Nutr Diabetes 2021; 11:5. [PMID: 33414377 PMCID: PMC7791135 DOI: 10.1038/s41387-020-00144-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 11/03/2020] [Accepted: 11/16/2020] [Indexed: 12/15/2022] Open
Abstract
Background Short-term exercise training programs that consist of moderate intensity endurance training or high intensity interval training have become popular choices for healthy lifestyle modifications, with as little as two weeks of training being shown to improve cardiorespiratory fitness and whole-body glucose metabolism. An emerging concept in exercise biology is that exercise stimulates the release of cytokines and other factors into the blood that contribute to the beneficial effects of exercise on metabolism, but whether these factors behave similarly in response to moderate and high intensity short term training is not known. Here, we determined the effects of two short-term exercise training programs on the concentrations of select secreted cytokines and Klotho, a protein involved in anti-aging. Methods Healthy, sedentary men (n = 22) were randomized to moderate intensity training (MIT) or sprint intensity training (SIT) treatment groups. SIT consisted of 6 sessions over 2 weeks of 6 × 30 s all out cycle ergometer sprints with 4 min of recovery between sprints. MIT consisted of 6 sessions over 2 weeks of cycle ergometer exercise at 60% VO2peak, gradually increasing in duration from 40 to 60 min. Blood was taken before the intervention and 48 h after the last training session, and glucose uptake was measured using [18F]FDG‐PET/CT scanning. Cytokines were measured by multiplex and Klotho concentrations by ELISA. Results Both training protocols similarly increased VO2peak and decreased fat percentage and visceral fat (P < 0.05). MIT and SIT training programs both reduced the concentrations of IL-6, Hepatocyte Growth Factor (HGF) and Leptin. Interestingly, MIT, but not SIT increased monocyte chemoattractant protein-1 (MCP-1) concentrations, an exercise-induced cytokine, as well as Klotho concentrations. Conclusion Short-term exercise training at markedly different intensities similarly improves cardiovascular fitness but results in intensity-specific changes in cytokine responses to exercise.
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17
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Vatner SF, Zhang J, Oydanich M, Berkman T, Naftalovich R, Vatner DE. Healthful aging mediated by inhibition of oxidative stress. Ageing Res Rev 2020; 64:101194. [PMID: 33091597 PMCID: PMC7710569 DOI: 10.1016/j.arr.2020.101194] [Citation(s) in RCA: 100] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 09/29/2020] [Accepted: 10/12/2020] [Indexed: 12/14/2022]
Abstract
The progressive increase in lifespan over the past century carries with it some adversity related to the accompanying burden of debilitating diseases prevalent in the older population. This review focuses on oxidative stress as a major mechanism limiting longevity in general, and healthful aging, in particular. Accordingly, the first goal of this review is to discuss the role of oxidative stress in limiting longevity, and compare healthful aging and its mechanisms in different longevity models. Secondly, we discuss common signaling pathways involved in protection against oxidative stress in aging and in the associated diseases of aging, e.g., neurological, cardiovascular and metabolic diseases, and cancer. Much of the literature has focused on murine models of longevity, which will be discussed first, followed by a comparison with human models of longevity and their relationship to oxidative stress protection. Finally, we discuss the extent to which the different longevity models exhibit the healthful aging features through physiological protective mechanisms related to exercise tolerance and increased β-adrenergic signaling and also protection against diabetes and other metabolic diseases, obesity, cancer, neurological diseases, aging-induced cardiomyopathy, cardiac stress and osteoporosis.
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Affiliation(s)
- Stephen F Vatner
- Department of Cell Biology and Molecular Medicine, New Jersey Medical School, Newark, New Jersey, USA.
| | - Jie Zhang
- Department of Cell Biology and Molecular Medicine, New Jersey Medical School, Newark, New Jersey, USA
| | - Marko Oydanich
- Department of Cell Biology and Molecular Medicine, New Jersey Medical School, Newark, New Jersey, USA
| | - Tolga Berkman
- Department of Cell Biology and Molecular Medicine, New Jersey Medical School, Newark, New Jersey, USA
| | - Rotem Naftalovich
- Department of Anesthesiology, New Jersey Medical School, Newark, New Jersey, USA
| | - Dorothy E Vatner
- Department of Cell Biology and Molecular Medicine, New Jersey Medical School, Newark, New Jersey, USA.
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18
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Law JP, Price AM, Pickup L, Radhakrishnan A, Weston C, Jones AM, McGettrick HM, Chua W, Steeds RP, Fabritz L, Kirchhof P, Pavlovic D, Townend JN, Ferro CJ. Clinical Potential of Targeting Fibroblast Growth Factor-23 and αKlotho in the Treatment of Uremic Cardiomyopathy. J Am Heart Assoc 2020; 9:e016041. [PMID: 32212912 PMCID: PMC7428638 DOI: 10.1161/jaha.120.016041] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Chronic kidney disease is highly prevalent, affecting 10% to 15% of the adult population worldwide and is associated with increased cardiovascular morbidity and mortality. As chronic kidney disease worsens, a unique cardiovascular phenotype develops characterized by heart muscle disease, increased arterial stiffness, atherosclerosis, and hypertension. Cardiovascular risk is multifaceted, but most cardiovascular deaths in patients with advanced chronic kidney disease are caused by heart failure and sudden cardiac death. While the exact drivers of these deaths are unknown, they are believed to be caused by uremic cardiomyopathy: a specific pattern of myocardial hypertrophy, fibrosis, with both diastolic and systolic dysfunction. Although the pathogenesis of uremic cardiomyopathy is likely to be multifactorial, accumulating evidence suggests increased production of fibroblast growth factor-23 and αKlotho deficiency as potential major drivers of cardiac remodeling in patients with uremic cardiomyopathy. In this article we review the increasing understanding of the physiology and clinical aspects of uremic cardiomyopathy and the rapidly increasing knowledge of the biology of both fibroblast growth factor-23 and αKlotho. Finally, we discuss how dissection of these pathological processes is aiding the development of therapeutic options, including small molecules and antibodies, directly aimed at improving the cardiovascular outcomes of patients with chronic kidney disease and end-stage renal disease.
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Affiliation(s)
- Jonathan P. Law
- Birmingham Cardio‐Renal GroupUniversity Hospitals BirminghamUniversity of BirminghamUnited Kingdom
- Institute of Cardiovascular SciencesUniversity of BirminghamUnited Kingdom
- Department of NephrologyUniversity Hospitals Birmingham NHS Foundation TrustBirminghamUnited Kingdom
| | - Anna M. Price
- Birmingham Cardio‐Renal GroupUniversity Hospitals BirminghamUniversity of BirminghamUnited Kingdom
- Institute of Cardiovascular SciencesUniversity of BirminghamUnited Kingdom
- Department of NephrologyUniversity Hospitals Birmingham NHS Foundation TrustBirminghamUnited Kingdom
| | - Luke Pickup
- Birmingham Cardio‐Renal GroupUniversity Hospitals BirminghamUniversity of BirminghamUnited Kingdom
- Institute of Cardiovascular SciencesUniversity of BirminghamUnited Kingdom
| | - Ashwin Radhakrishnan
- Birmingham Cardio‐Renal GroupUniversity Hospitals BirminghamUniversity of BirminghamUnited Kingdom
| | - Chris Weston
- Institute of Immunology and ImmunotherapyUniversity of BirminghamUnited Kingdom
- NIHR Birmingham Biomedical Research CentreUniversity Hospitals Birmingham NHS Foundation Trust and University of BirminghamUnited Kingdom
| | - Alan M. Jones
- School of PharmacyUniversity of BirminghamUnited Kingdom
| | | | - Winnie Chua
- Birmingham Cardio‐Renal GroupUniversity Hospitals BirminghamUniversity of BirminghamUnited Kingdom
- Institute of Cardiovascular SciencesUniversity of BirminghamUnited Kingdom
| | - Richard P. Steeds
- Birmingham Cardio‐Renal GroupUniversity Hospitals BirminghamUniversity of BirminghamUnited Kingdom
- Institute of Cardiovascular SciencesUniversity of BirminghamUnited Kingdom
- Department of CardiologyUniversity Hospitals Birmingham NHS Foundation TrustBirminghamUnited Kingdom
| | - Larissa Fabritz
- Birmingham Cardio‐Renal GroupUniversity Hospitals BirminghamUniversity of BirminghamUnited Kingdom
- Institute of Cardiovascular SciencesUniversity of BirminghamUnited Kingdom
- Department of CardiologyUniversity Hospitals Birmingham NHS Foundation TrustBirminghamUnited Kingdom
| | - Paulus Kirchhof
- Birmingham Cardio‐Renal GroupUniversity Hospitals BirminghamUniversity of BirminghamUnited Kingdom
- Institute of Cardiovascular SciencesUniversity of BirminghamUnited Kingdom
| | - Davor Pavlovic
- Birmingham Cardio‐Renal GroupUniversity Hospitals BirminghamUniversity of BirminghamUnited Kingdom
- Institute of Cardiovascular SciencesUniversity of BirminghamUnited Kingdom
| | - Jonathan N. Townend
- Birmingham Cardio‐Renal GroupUniversity Hospitals BirminghamUniversity of BirminghamUnited Kingdom
- Institute of Cardiovascular SciencesUniversity of BirminghamUnited Kingdom
- Department of CardiologyUniversity Hospitals Birmingham NHS Foundation TrustBirminghamUnited Kingdom
| | - Charles J. Ferro
- Birmingham Cardio‐Renal GroupUniversity Hospitals BirminghamUniversity of BirminghamUnited Kingdom
- Institute of Cardiovascular SciencesUniversity of BirminghamUnited Kingdom
- Department of NephrologyUniversity Hospitals Birmingham NHS Foundation TrustBirminghamUnited Kingdom
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19
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Rao Z, Zheng L, Huang H, Feng Y, Shi R. α-Klotho Expression in Mouse Tissues Following Acute Exhaustive Exercise. Front Physiol 2019; 10:1498. [PMID: 31920703 PMCID: PMC6919267 DOI: 10.3389/fphys.2019.01498] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 11/25/2019] [Indexed: 12/22/2022] Open
Abstract
α-Klotho, a multifunctional protein, has been demonstrated to protect tissues from injury via anti-oxidation and anti-inflammatory effects. The expression of α-klotho is regulated by several physiological and pathological factors, including acute inflammatory stress, oxidative stress, hypertension, and chronic renal failure. Exhaustive exercise has been reported to result in tissue damage, which is induced by inflammation, oxidative stress, and energy metabolism disturbance. However, little is known about the effects of exhaustive exercise on the expression of α-klotho in various tissues. To determine the effects, the treadmill exhaustion test in mice was performed and the mice were sacrificed at different time points following exhaustive exercise. Our results confirmed that the full-length (130 kDa) and shorter-form (65 kDa) α-klotho were primarily expressed in the kidneys. Moreover, we found that, except for the kidneys and brain, other tissues primarily expressed the shorter-form α-klotho, including liver, which was in contrast to previous reports. Furthermore, the shorter-form α-klotho was decreased immediately following the acute exhaustive exercise and was then restored to the pre-exercise level or even higher levels in the next few days. Our results indicate that α-klotho may play a key role in the body exhaustion and recovery following exhaustive exercise.
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Affiliation(s)
- Zhijian Rao
- College of Physical Education, Shanghai Normal University, Shanghai, China.,School of Kinesiology, Shanghai University of Sport, Shanghai, China.,Department of Kinesiology and Physiology, East Carolina University, Greenville, NC, United States
| | - Lifang Zheng
- School of Kinesiology, Shanghai University of Sport, Shanghai, China
| | - Hu Huang
- Department of Kinesiology and Physiology, East Carolina University, Greenville, NC, United States
| | - Yu Feng
- School of Kinesiology, Shanghai University of Sport, Shanghai, China
| | - Rengfei Shi
- School of Kinesiology, Shanghai University of Sport, Shanghai, China
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20
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Association of physical activity and fitness with S-Klotho plasma levels in middle-aged sedentary adults: The FIT-AGEING study. Maturitas 2019; 123:25-31. [DOI: 10.1016/j.maturitas.2019.02.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 01/30/2019] [Accepted: 02/04/2019] [Indexed: 12/14/2022]
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21
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Affiliation(s)
- J E Morley
- John E. Morley, MB, BCh, Division of Geriatric Medicine, Saint Louis University School of Medicine, 1402 S. Grand Blvd., M238, St. Louis, MO 63104,
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