1
|
Hoffman AJ, Finger JW, Kavazis AN, Wada H. Early life thermal conditioning alters heat-shock protein expression in response to an adult thermal stressor. JOURNAL OF EXPERIMENTAL ZOOLOGY. PART A, ECOLOGICAL AND INTEGRATIVE PHYSIOLOGY 2024. [PMID: 39005228 DOI: 10.1002/jez.2858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 06/27/2024] [Accepted: 06/28/2024] [Indexed: 07/16/2024]
Abstract
Developmental environmental stressors can have instructive effects on an organism's phenotype. This developmental plasticity can prepare organisms for potentially stressful future environments, circumventing detrimental effects on fitness. However, the physiological mechanisms underlying such adaptive plasticity are understudied, especially in vertebrates. We hypothesized that captive male zebra finches (Taeniopygia castanotis) exposed to a mild heat conditioning during development would acquire a persisting thermotolerance, and exhibit increased heat-shock protein (HSP) levels associated with a decrease in oxidative damage when exposed to a high-intensity stressor in adulthood. To test this, we exposed male finches to a prolonged mild heat conditioning (38°C) or control (22°C) treatment as juveniles. Then in a 2 × 2 factorial manner, these finches were exposed to a high heat stressor (42°C) or control (22°C) treatment as adults. Following the adult treatment, we collected testes and liver tissue and measured HSP70, HSP90, and HSP60 protein levels. In the testes, finches exhibited lower levels of HSP90 and HSP60 when exposed to the high heat stressor in adulthood if they were exposed to the mild heat conditioning as juveniles. In the liver, finches exposed to the high heat stressor in adulthood had reduced HSP90 and HSP60 levels, regardless of whether they were conditioned as juveniles. In some cases, elevated testes HSP60 levels were associated with increased liver oxidative damage and diminishment of a condition-dependent trait, indicating potential stress-induced tradeoffs. Our results indicate that a mild conditioning during development can have persisting effects on HSP expression and acquired thermotolerance.
Collapse
Affiliation(s)
| | - John W Finger
- Department of Biological Sciences, Auburn University, Auburn, Alabama, USA
- Biomedical Sciences Department, Missouri State University, Springfield, Missouri, USA
| | | | - Haruka Wada
- Department of Biological Sciences, Auburn University, Auburn, Alabama, USA
| |
Collapse
|
2
|
Gonzalez-Armenta JL, Bergstrom J, Lee J, Furdui CM, Nicklas BJ, Molina AJA. Serum factors mediate changes in mitochondrial bioenergetics associated with diet and exercise interventions. GeroScience 2024; 46:349-365. [PMID: 37368157 PMCID: PMC10828137 DOI: 10.1007/s11357-023-00855-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 06/15/2023] [Indexed: 06/28/2023] Open
Abstract
Mitochondrial improvements resulting from behavioral interventions, such as diet and exercise, are systemic and apparent across multiple tissues. Here, we test the hypothesis that factors present in serum, and therefore circulating throughout the body, can mediate changes in mitochondrial function in response to intervention. To investigate this, we used stored serum from a clinical trial comparing resistance training (RT) and RT plus caloric restriction (RT + CR) to examine effects of blood borne circulating factors on myoblasts in vitro. We report that exposure to dilute serum is sufficient to mediate bioenergetic benefits of these interventions. Additionally, serum-mediated bioenergetic changes can differentiate between interventions, recapitulate sex differences in bioenergetic responses, and is linked to improvements in physical function and inflammation. Using metabolomics, we identified circulating factors associated with changes in mitochondrial bioenergetics and the effects of interventions. This study provides new evidence that circulating factors play a role in the beneficial effects of interventions that improve healthspan among older adults. Understanding the factors that drive improvements in mitochondrial function is a key step towards predicting intervention outcomes and developing strategies to countermand systemic age-related bioenergetic decline.
Collapse
Affiliation(s)
- Jenny L Gonzalez-Armenta
- Section On Gerontology and Geriatrics, Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Jaclyn Bergstrom
- Division of Geriatrics, Gerontology, and Palliative Care, Department of Medicine, University of California San Diego School of Medicine, 9500 Gilman Drive, MC 0665, La Jolla, CA, 92093-0665, USA
| | - Jingyun Lee
- Proteomics and Metabolomics Shared Resource, Comprehensive Cancer Center, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Cristina M Furdui
- Section On Molecular Medicine, Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Barbara J Nicklas
- Section On Gerontology and Geriatrics, Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Anthony J A Molina
- Division of Geriatrics, Gerontology, and Palliative Care, Department of Medicine, University of California San Diego School of Medicine, 9500 Gilman Drive, MC 0665, La Jolla, CA, 92093-0665, USA.
| |
Collapse
|
3
|
Heo J, Schifino AG, McFaline‐Figueroa J, Miller DL, Hoffman JR, Noble EE, Greising SM, Call JA. Differential effects of Western diet and traumatic muscle injury on skeletal muscle metabolic regulation in male and female mice. J Cachexia Sarcopenia Muscle 2023; 14:2835-2850. [PMID: 37879629 PMCID: PMC10751418 DOI: 10.1002/jcsm.13361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 09/19/2023] [Accepted: 09/20/2023] [Indexed: 10/27/2023] Open
Abstract
BACKGROUND This study was designed to develop an understanding of the pathophysiology of traumatic muscle injury in the context of Western diet (WD; high fat and high sugar) and obesity. The objective was to interrogate the combination of WD and injury on skeletal muscle mass and contractile and metabolic function. METHODS Male and female C57BL/6J mice were randomized into four groups based on a two-factor study design: (1) injury (uninjured vs. volumetric muscle loss [VML]) and (2) diet (WD vs. normal chow [NC]). Electrophysiology was used to test muscle strength and metabolic function in cohorts of uninjured + NC, uninjured + WD, VML + NC and VML + WD at 8 weeks of intervention. RESULTS VML-injured male and female mice both exhibited decrements in muscle mass (-17%, P < 0.001) and muscle strength (-28%, P < 0.001); however, VML + WD females had a 28% greater muscle mass compared to VML + NC females (P = 0.034), a compensatory response not detected in males. VML-injured male and female mice both had lower carbohydrate- and fat-supported muscle mitochondrial respiration (JO2 ) and less electron conductance through the electron transport system (ETS); however, male VML-WD had 48% lower carbohydrate-supported JO2 (P = 0.014) and 47% less carbohydrate-supported electron conductance (P = 0.026) compared to male VML + NC, and this diet-injury phenotype was not present in females. ETS electron conductance starts with complex I and complex II dehydrogenase enzymes at the inner mitochondrial membrane, and male VML + WD had 31% less complex I activity (P = 0.004) and 43% less complex II activity (P = 0.005) compared to male VML + NC. This was a diet-injury phenotype not present in females. Pyruvate dehydrogenase (PDH), β-hydroxyacyl-CoA dehydrogenase, citrate synthase, α-ketoglutarate dehydrogenase and malate dehydrogenase metabolic enzyme activities were evaluated as potential drivers of impaired JO2 in the context of diet and injury. There were notable male and female differential effects in the enzyme activity and post-translational regulation of PDH. PDH enzyme activity was 24% less in VML-injured males, independent of diet (P < 0.001), but PDH enzyme activity was not influenced by injury in females. PDH enzyme activity is inhibited by phosphorylation at serine-293 by PDH kinase 4 (PDK4). In males, there was greater total PDH, phospho-PDHser293 and phospho-PDH-to-total PDH ratio in WD mice compared to NC, independent of injury (P ≤ 0.041). In females, PDK4 was 51% greater in WD compared to NC, independent of injury (P = 0.025), and was complemented by greater phospho-PDHser293 (P = 0.001). CONCLUSIONS Males are more susceptible to muscle metabolic dysfunction in the context of combined WD and traumatic injury compared to females, and this may be due to impaired metabolic enzyme functions.
Collapse
Affiliation(s)
- Junwon Heo
- Department of Physiology and PharmacologyUniversity of GeorgiaAthensGAUSA
- Regenerative Bioscience CenterUniversity of GeorgiaAthensGAUSA
| | - Albino G. Schifino
- Regenerative Bioscience CenterUniversity of GeorgiaAthensGAUSA
- Department of KinesiologyUniversity of GeorgiaAthensGAUSA
| | - Jennifer McFaline‐Figueroa
- Department of Physiology and PharmacologyUniversity of GeorgiaAthensGAUSA
- Regenerative Bioscience CenterUniversity of GeorgiaAthensGAUSA
| | - David L. Miller
- Department of Physiology and PharmacologyUniversity of GeorgiaAthensGAUSA
- Regenerative Bioscience CenterUniversity of GeorgiaAthensGAUSA
| | - Jessica R. Hoffman
- Department of Physiology and PharmacologyUniversity of GeorgiaAthensGAUSA
- Regenerative Bioscience CenterUniversity of GeorgiaAthensGAUSA
| | - Emily E. Noble
- Department of Nutritional ScienceUniversity of GeorgiaAthensGAUSA
| | | | - Jarrod A. Call
- Department of Physiology and PharmacologyUniversity of GeorgiaAthensGAUSA
- Regenerative Bioscience CenterUniversity of GeorgiaAthensGAUSA
| |
Collapse
|
4
|
Tan Q, Zhang X, Li S, Liu W, Yan J, Wang S, Cui F, Li D, Li J. DMT1 differentially regulates mitochondrial complex activities to reduce glutathione loss and mitigate ferroptosis. Free Radic Biol Med 2023; 207:32-44. [PMID: 37419216 DOI: 10.1016/j.freeradbiomed.2023.06.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 06/23/2023] [Accepted: 06/23/2023] [Indexed: 07/09/2023]
Abstract
Mitochondria are vital for energy production and redox homeostasis, yet knowledge of relevant mechanisms remains limited. Here, through a genome-wide CRISPR-Cas9 knockout screening, we have identified DMT1 as a major regulator of mitochondria membrane potential. Our findings demonstrate that DMT1 deficiency increases the activity of mitochondrial complex I and reduces that of complex III. Enhanced complex I activity leads to increased NAD+ production, which activates IDH2 by promoting its deacetylation via SIRT3. This results in higher levels of NADPH and GSH, which improve antioxidant capacity during Erastin-induced ferroptosis. Meanwhile, loss of complex III activity impairs mitochondrial biogenesis and promotes mitophagy, contributing to suppression of ferroptosis. Thus, DMT1 differentially regulates activities of mitochondrial complex I and III to cooperatly suppress Erastin-induced ferroptosis. Furthermore, NMN, an alternative method of increasing mitochondrial NAD+, exhibits similar protective effects against ferroptosis by boosting GSH in a manner similar to DMT1 deficiency, shedding a light on potential therapeutic strategy for ferroptosis-related pathologies.
Collapse
Affiliation(s)
- Qing Tan
- State Key Laboratory of Common Mechanism Research for Major Diseases, Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100005, China
| | - Xiaoqian Zhang
- State Key Laboratory of Common Mechanism Research for Major Diseases, Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100005, China
| | - Shuxiang Li
- State Key Laboratory of Common Mechanism Research for Major Diseases, Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100005, China
| | - Wenbin Liu
- State Key Laboratory of Common Mechanism Research for Major Diseases, Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100005, China
| | - Jiaqi Yan
- State Key Laboratory of Common Mechanism Research for Major Diseases, Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100005, China
| | - Siqi Wang
- State Key Laboratory of Common Mechanism Research for Major Diseases, Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100005, China
| | - Feng Cui
- State Key Laboratory of Common Mechanism Research for Major Diseases, Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100005, China
| | - Dan Li
- Department of Obstetrics and Gynecology, Maternal and Child Health Hospital of Qinhuangdao, Qinhuangdao, 066000, China.
| | - Jun Li
- State Key Laboratory of Common Mechanism Research for Major Diseases, Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100005, China.
| |
Collapse
|
5
|
Khouri H, Ussher JR, Aguer C. Exogenous Ketone Supplementation and Ketogenic Diets for Exercise: Considering the Effect on Skeletal Muscle Metabolism. Nutrients 2023; 15:4228. [PMID: 37836512 PMCID: PMC10574738 DOI: 10.3390/nu15194228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 09/23/2023] [Accepted: 09/25/2023] [Indexed: 10/15/2023] Open
Abstract
In recent years, ketogenic diets and ketone supplements have increased in popularity, particularly as a mechanism to improve exercise performance by modifying energetics. Since the skeletal muscle is a major metabolic and locomotory organ, it is important to take it into consideration when considering the effect of a dietary intervention, and the impact of physical activity on the body. The goal of this review is to summarize what is currently known and what still needs to be investigated concerning the relationship between ketone body metabolism and exercise, specifically in the skeletal muscle. Overall, it is clear that increased exposure to ketone bodies in combination with exercise can modify skeletal muscle metabolism, but whether this effect is beneficial or detrimental remains unclear and needs to be further interrogated before ketogenic diets or exogenous ketone supplementation can be recommended.
Collapse
Affiliation(s)
- Hannah Khouri
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, ON K1N 6N5, Canada
- Institut du Savoir Montfort, Hôpital Montfort, Ottawa, ON K1K 0T2, Canada
| | - John R Ussher
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, AB T6G 2H5, Canada
| | - Céline Aguer
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, ON K1N 6N5, Canada
- Institut du Savoir Montfort, Hôpital Montfort, Ottawa, ON K1K 0T2, Canada
- Department of Physiology, Faculty of Medicine and Health Sciences, McGill University-Campus Outaouais, Gatineau, QC J8V 3T4, Canada
| |
Collapse
|
6
|
Taş E, Ülgen KO. Understanding the ADHD-Gut Axis by Metabolic Network Analysis. Metabolites 2023; 13:metabo13050592. [PMID: 37233633 DOI: 10.3390/metabo13050592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Revised: 04/19/2023] [Accepted: 04/19/2023] [Indexed: 05/27/2023] Open
Abstract
Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental disorder diagnosed with hyperactivity, impulsivity, and a lack of attention inconsistent with the patient's development level. The fact that people with ADHD frequently experience gastrointestinal (GI) dysfunction highlights the possibility that the gut microbiome may play a role in this condition. The proposed research aims to determine a biomarker for ADHD by reconstructing a model of the gut-microbial community. Genome-scale metabolic models (GEM) considering the relationship between gene-protein-reaction associations are used to simulate metabolic activities in organisms of gut. The production rates of dopamine and serotonin precursors and the key short chain fatty acids which affect the health status are determined under three diets (Western, Atkins', Vegan) and compared with those of healthy people. Elasticities are calculated to understand the sensitivity of exchange fluxes to changes in diet and bacterial abundance at the species level. The presence of Bacillota (genus Coprococcus and Subdoligranulum), Actinobacteria (genus Collinsella), Bacteroidetes (genus Bacteroides), and Bacteroidota (genus Alistipes) may be possible gut microbiota indicators of ADHD. This type of modeling approach taking microbial genome-environment interactions into account helps us understand the gastrointestinal mechanisms behind ADHD, and establish a path to improve the quality of life of ADHD patients.
Collapse
Affiliation(s)
- Ezgi Taş
- Department of Chemical Engineering, Bogazici University, Istanbul 34342, Turkey
| | - Kutlu O Ülgen
- Department of Chemical Engineering, Bogazici University, Istanbul 34342, Turkey
| |
Collapse
|
7
|
Yakupova EI, Bocharnikov AD, Plotnikov EY. Effects of Ketogenic Diet on Muscle Metabolism in Health and Disease. Nutrients 2022; 14:nu14183842. [PMID: 36145218 PMCID: PMC9505561 DOI: 10.3390/nu14183842] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 09/09/2022] [Accepted: 09/11/2022] [Indexed: 11/16/2022] Open
Abstract
Dietary intervention is widely used as a therapeutic approach ranging from the treatment of neurological disorders to attempts to extend lifespan. The most important effect of various diets is a change in energy metabolism. Since muscles constitute 40% of total body mass and are one of the major sites of glucose and energy uptake, various diets primarily affect their metabolism, causing both positive and negative changes in physiology and signaling pathways. In this review, we discuss changes in the energy metabolism of muscles under conditions of the low-carbohydrate, high-fat diet/ketogenic diet (KD), fasting, or administration of exogenous ketone bodies, which are all promising approaches to the treatment of various diseases. KD's main influence on the muscle is expressed through energy metabolism changes, particularly decreased carbohydrate and increased fat oxidation. This affects mitochondrial quantity, oxidative metabolism, antioxidant capacity, and activity of enzymes. The benefits of KD for muscles stay controversial, which could be explained by its different effects on various fiber types, including on muscle fiber-type ratio. The impacts of KD or of its mimetics are largely beneficial but could sometimes induce adverse effects such as cardiac fibrosis.
Collapse
Affiliation(s)
- Elmira I. Yakupova
- A.N. Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119234 Moscow, Russia
- Correspondence: (E.I.Y.); (E.Y.P.)
| | - Alexey D. Bocharnikov
- International School of Medicine of the Future, Sechenov First Moscow State Medical University, 119992 Moscow, Russia
| | - Egor Y. Plotnikov
- A.N. Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119234 Moscow, Russia
- V.I. Kulakov National Medical Research Center of Obstetrics, Gynecology, and Perinatology, 117997 Moscow, Russia
- Correspondence: (E.I.Y.); (E.Y.P.)
| |
Collapse
|
8
|
Finger JW, Kelley MD, Zhang Y, Ka C, Hamilton MT, Elsey RM, Kavazis A, Mendonca MT. Relationships of Brain Glucocorticoid Receptors and Commonly Used Stress Parameters with Body Condition of Juvenile American Alligators (Alligator mississippiensis). SOUTH AMERICAN JOURNAL OF HERPETOLOGY 2022. [DOI: 10.2994/sajh-d-20-00008.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- John W. Finger
- Department of Biological Sciences, Auburn University, Auburn, AL 36849, USA
| | - Meghan D. Kelley
- Department of Biological Sciences, Auburn University, Auburn, AL 36849, USA
| | - Yufeng Zhang
- School of Health Studies, University of Memphis, Memphis, TN 38152, USA
| | - Cheikhouna Ka
- Department of Biological Sciences, Auburn University, Auburn, AL 36849, USA
| | - Matthew T. Hamilton
- Department of Forestry and Natural Resources, Purdue University, West Lafayette, IN 47907, USA
| | - Ruth M. Elsey
- Louisiana Department of Wildlife and Fisheries, Rockefeller Wildlife Refuge, Grand Chenier, LA 70643, USA
| | - Andreas Kavazis
- School of Kinesiology, Auburn University, Auburn, AL 36849, USA
| | - Mary T. Mendonca
- Department of Biological Sciences, Auburn University, Auburn, AL 36849, USA
| |
Collapse
|
9
|
Finger JW, Kelley M, Hamilton M, Zhang Y, Elsey R, Mendonca M, Kavazis AN. Changes in antioxidant enzyme levels following capture in juvenile American Alligators (Alligator mississippiensis) are tissue dependent. CAN J ZOOL 2022. [DOI: 10.1139/cjz-2021-0231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Many parameters used to investigate stress in vertebrates are temporally sensitive. The act of capture and sampling can influence them, hindering their functionality for evaluating the effects of stressors. Consequently, the investigation and subsequent incorporation of less time sensitive parameters are necessary to better evaluate stressors affecting vertebrates. In this study, we investigated how capture stress and handling associated with sampling influences antioxidant status in American Alligators (Alligator mississippiensis, Daudin, 1802; hereafter Alligator), long-lived, top-trophic carnivores found in the southeastern United States, by measuring levels of two antioxidant enzymes in destructive (brain and pancreas) and nondestructive (tail scutes) tissues: superoxide-dismutase-1 (SOD1) and glutathione peroxidase-1 (GPX1). Capture stress had no effect on pancreatic SOD1 and no effect on brain and pancreatic GPX1 (all p > 0.05). However, brain SOD1, scute SOD1, and scute GPX1 were all impacted by capture stress. These disparate results illustrate that the influence of capture stress on antioxidant enzymes in Alligators is tissue and marker dependent, necessitating further investigation. Our results provide a firm foundation to further investigate oxidative status in crocodilians.
Collapse
Affiliation(s)
- John W. Finger
- Auburn University, 1383, Department of Biological Sciences, Auburn, United States, 36849-5412
| | - Meghan Kelley
- Auburn University, 1383, Auburn, Alabama, United States
| | - Matthew Hamilton
- Purdue University, 311308, West Lafayette, Indiana, United States
| | - Yufeng Zhang
- The University of Memphis, 5415, Memphis, Tennessee, United States
| | - Ruth Elsey
- Departement of wildlife and fisheries, Louisiana, USA, 5476 Grand Chenier Highway, Grand Chenier, United States, 70643
| | - Mary Mendonca
- Auburn University, 1383, Auburn, Alabama, United States
| | | |
Collapse
|
10
|
Finger JW, Kelley MD, Zhang Y, Hamilton MT, Elsey RM, Mendonca MT, Kavazis A. Short-term capture stress and its effects on corticosterone levels and heat shock proteins in captive American Alligators (Alligator mississippiensis). CAN J ZOOL 2021. [DOI: 10.1139/cjz-2021-0014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Heat shock proteins (HSPs) are important mediators of the normal cellular function and the cellular stress response. As such, HSPs are often utilized to measure the effects of stressors on organisms in vivo. However, multiple variables can influence their expression, including time or season, confounding results. To investigate the utility of HSPs in measuring effects of stressors in a top-trophic carnivore, we captured 20 American Alligators (Alligator mississippiensis (Daudin, 1802)), placed them in burlap sacks for 2 h and collected blood samples over four time points (baseline, 1 and 2 h after placement into burlap sacks, and 24 h after initial capture) to measure plasma corticosterone (the main crocodilian glucocorticoid) and levels of HSP60, HSP70, and HSP90. Time point significantly affected plasma corticosterone levels in Alligators (p < 0.0001), with levels significantly elevated at 1, 2, and 24 h, relative to baseline (all p < 0.05). However, capture stress did not affect HSP60, HSP70, or HSP90 in red blood cells (all p > 0.05). Our results suggest HSPs may be important biomarkers for investigating the impacts of stressors on captive and wild crocodilians, as they are not acutely elevated by capture or handling stress.
Collapse
Affiliation(s)
- John W. Finger
- Department of Biological Sciences, Auburn University, Auburn, AL 36849, USA
| | - Meghan D. Kelley
- Department of Biological Sciences, Auburn University, Auburn, AL 36849, USA
| | - Yufeng Zhang
- College of Health Sciences, University of Memphis, Memphis, TN 38152, USA
| | - Matthew T. Hamilton
- Department of Forestry and Natural Resources, Purdue University, West Lafayette, IN 47907, USA
| | - Ruth M. Elsey
- Louisiana Department of Wildlife and Fisheries, Rockefeller Wildlife Refuge, Grand Chenier, LA 70643, USA
| | - Mary T. Mendonca
- Department of Biological Sciences, Auburn University, Auburn, AL 36849, USA
| | - Andreas Kavazis
- School of Kinesiology, Auburn University, Auburn, AL 36849, USA
| |
Collapse
|
11
|
Zhou Z, Vidales J, González-Reyes JA, Shibata B, Baar K, Rutkowsky JM, Ramsey JJ. A 1-Month Ketogenic Diet Increased Mitochondrial Mass in Red Gastrocnemius Muscle, but Not in the Brain or Liver of Middle-Aged Mice. Nutrients 2021; 13:nu13082533. [PMID: 34444693 PMCID: PMC8401881 DOI: 10.3390/nu13082533] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Revised: 07/10/2021] [Accepted: 07/21/2021] [Indexed: 01/05/2023] Open
Abstract
Alterations in markers of mitochondrial content with ketogenic diets (KD) have been reported in tissues of rodents, but morphological quantification of mitochondrial mass using transmission electron microscopy (TEM), the gold standard for mitochondrial quantification, is needed to further validate these findings and look at specific regions of interest within a tissue. In this study, red gastrocnemius muscle, the prefrontal cortex, the hippocampus, and the liver left lobe were used to investigate the impact of a 1-month KD on mitochondrial content in healthy middle-aged mice. The results showed that in red gastrocnemius muscle, the fractional area of both subsarcolemmal (SSM) and intermyofibrillar (IMM) mitochondria was increased, and this was driven by an increase in the number of mitochondria. Mitochondrial fractional area or number was not altered in the liver, prefrontal cortex, or hippocampus following 1 month of a KD. These results demonstrate tissue-specific changes in mitochondrial mass with a short-term KD and highlight the need to study different muscle groups or tissue regions with TEM to thoroughly determine the effects of a KD on mitochondrial mass.
Collapse
Affiliation(s)
- Zeyu Zhou
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA; (Z.Z.); (J.V.)
| | - Jocelyn Vidales
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA; (Z.Z.); (J.V.)
| | - José A. González-Reyes
- Department of Cell Biology, Physiology and Immunology, Campus de Excelencia Internacional Agroalimentario, CeiA3, University of Córdoba, 14071 Córdoba, Spain;
| | - Bradley Shibata
- Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, CA 95616, USA;
| | - Keith Baar
- Department of Neurobiology, Physiology, and Behavior, University of California, Davis, CA 95616, USA;
| | - Jennifer M. Rutkowsky
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA; (Z.Z.); (J.V.)
- Correspondence: (J.M.R.); (J.J.R.)
| | - Jon J. Ramsey
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA; (Z.Z.); (J.V.)
- Correspondence: (J.M.R.); (J.J.R.)
| |
Collapse
|
12
|
Kuter KZ, Olech Ł, Głowacka U, Paleczna M. Increased Beta-Hydroxybutyrate Level Is Not Sufficient for the Neuroprotective Effect of Long-Term Ketogenic Diet in an Animal Model of Early Parkinson's Disease. Exploration of Brain and Liver Energy Metabolism Markers. Int J Mol Sci 2021; 22:ijms22147556. [PMID: 34299176 PMCID: PMC8307513 DOI: 10.3390/ijms22147556] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 07/09/2021] [Accepted: 07/12/2021] [Indexed: 12/25/2022] Open
Abstract
The benefits of a ketogenic diet in childhood epilepsy steered up hope for neuroprotective effects of hyperketonemia in Parkinson’s disease (PD). There are multiple theoretical reasons but very little actual experimental proof or clinical trials. We examined the long-term effects of the ketogenic diet in an animal model of early PD. A progressive, selective dopaminergic medium size lesion was induced by 6-OHDA injection into the medial forebrain bundle. Animals were kept on the stringent ketogenic diet (1% carbohydrates, 8% protein, 70% fat) for 3 weeks prior and 4 weeks after the brain operation. Locomotor activity, neuron count, dopaminergic terminal density, dopamine level, and turnover were analyzed at three time-points post-lesion, up to 4 weeks after the operation. Energy metabolism parameters (glycogen, mitochondrial complex I and IV, lactate, beta-hydroxybutyrate, glucose) were analyzed in the brain and liver or plasma. Protein expression of enzymes essential for gluconeogenesis (PEPCK, G6PC) and glucose utilization (GCK) was analyzed in the liver. Despite long-term hyperketonemia pre- and post-lesion, the ketogenic diet did not protect against 6-OHDA-induced dopaminergic neuron lesions. The ketogenic diet only tended to improve locomotor activity and normalize DA turnover in the striatum. Rats fed 7 weeks in total with a restrictive ketogenic diet maintained normoglycemia, and neither gluconeogenesis nor glycogenolysis in the liver was responsible for this effect. Therefore, potentially, the ketogenic diet could be therapeutically helpful to support the late compensatory mechanisms active via glial cells but does not necessarily act against the oxidative stress-induced parkinsonian neurodegeneration itself. A word of caution is required as the stringent ketogenic diet itself also carries the risk of unwanted side effects, so it is important to study the long-term effects of such treatments. More detailed metabolic long-term studies using unified diet parameters are required, and human vs. animal differences should be taken under consideration.
Collapse
|
13
|
Huang TY, Linden MA, Fuller SE, Goldsmith FR, Simon J, Batdorf HM, Scott MC, Essajee NM, Brown JM, Noland RC. Combined effects of a ketogenic diet and exercise training alter mitochondrial and peroxisomal substrate oxidative capacity in skeletal muscle. Am J Physiol Endocrinol Metab 2021; 320:E1053-E1067. [PMID: 33843280 PMCID: PMC8285595 DOI: 10.1152/ajpendo.00410.2020] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Ketogenic diets (KDs) are reported to improve body weight, fat mass, and exercise performance in humans. Unfortunately, most rodent studies have used a low-protein KD, which does not recapitulate diets used by humans. Since skeletal muscle plays a critical role in responding to macronutrient perturbations induced by diet and exercise, the purpose of this study was to test if a normal-protein KD (NPKD) impacts shifts in skeletal muscle substrate oxidative capacity in response to exercise training (ExTr). A high fat, carbohydrate-deficient NPKD (16.1% protein, 83.9% fat, 0% carbohydrate) was given to C57BL/6J male mice for 6 wk, whereas controls (Con) received a low-fat diet with similar protein (15.9% protein, 11.9% fat, 72.2% carbohydrate). After 3 wk on the diet, mice began treadmill training 5 days/wk, 60 min/day for 3 wks. The NPKD increased body weight and fat mass, whereas ExTr negated a continued rise in adiposity. ExTr increased intramuscular glycogen, whereas the NPKD increased intramuscular triglycerides. Neither the NPKD nor ExTr alone altered mitochondrial content; however, in combination, the NPKD-ExTr group showed increases in PGC-1α and markers of mitochondrial fission/fusion. Pyruvate oxidative capacity was unchanged by either intervention, whereas ExTr increased leucine oxidation in NPKD-fed mice. Lipid metabolism pathways had the most notable changes as the NPKD and ExTr interventions both enhanced mitochondrial and peroxisomal lipid oxidation and many adaptations were additive or synergistic. Overall, these results suggest that a combination of a NPKD and ExTr induces additive and/or synergistic adaptations in skeletal muscle oxidative capacity.NEW & NOTEWORTHY A ketogenic diet with normal protein content (NPKD) increases body weight and fat mass, increases intramuscular triglyceride storage, and upregulates pathways related to protein metabolism. In combination with exercise training, a NPKD induces additive and/or synergistic activation of AMPK, PGC-1α, mitochondrial fission/fusion genes, mitochondrial fatty acid oxidation, and peroxisomal adaptations in skeletal muscle. Collectively, results from this study provide mechanistic insight into adaptations in skeletal muscle relevant to keto-adaptation.
Collapse
Affiliation(s)
- Tai-Yu Huang
- Skeletal Muscle Metabolism Laboratory, Pennington Biomedical Research Center, Baton Rouge, Louisiana
| | - Melissa A Linden
- Skeletal Muscle Metabolism Laboratory, Pennington Biomedical Research Center, Baton Rouge, Louisiana
| | - Scott E Fuller
- Skeletal Muscle Metabolism Laboratory, Pennington Biomedical Research Center, Baton Rouge, Louisiana
| | - Felicia R Goldsmith
- Skeletal Muscle Metabolism Laboratory, Pennington Biomedical Research Center, Baton Rouge, Louisiana
| | - Jacob Simon
- Skeletal Muscle Metabolism Laboratory, Pennington Biomedical Research Center, Baton Rouge, Louisiana
| | - Heidi M Batdorf
- Skeletal Muscle Metabolism Laboratory, Pennington Biomedical Research Center, Baton Rouge, Louisiana
| | - Matthew C Scott
- Skeletal Muscle Metabolism Laboratory, Pennington Biomedical Research Center, Baton Rouge, Louisiana
| | - Nabil M Essajee
- Skeletal Muscle Metabolism Laboratory, Pennington Biomedical Research Center, Baton Rouge, Louisiana
| | - John M Brown
- Skeletal Muscle Metabolism Laboratory, Pennington Biomedical Research Center, Baton Rouge, Louisiana
| | - Robert C Noland
- Skeletal Muscle Metabolism Laboratory, Pennington Biomedical Research Center, Baton Rouge, Louisiana
| |
Collapse
|
14
|
Finger JW, Kelley MD, Zhang Y, Hamilton MT, Elsey RM, Mendonca MT, Kavazis AN. Antioxidant Enzymes in Destructible and Non-Destructible Tissues in American Alligators (Alligator mississippiensis). SOUTH AMERICAN JOURNAL OF HERPETOLOGY 2021. [DOI: 10.2994/sajh-d-19-00118.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- John W. Finger
- Department of Biological Sciences, Auburn University, Auburn, AL 36849, USA
| | - Meghan D. Kelley
- Department of Biological Sciences, Auburn University, Auburn, AL 36849, USA
| | - Yufeng Zhang
- School of Health Studies, University of Memphis, Memphis, TN 38152, USA
| | - Matthew T. Hamilton
- Department of Forestry and Natural Resources, Purdue University, West Lafayette, IN 47907, USA
| | - Ruth M. Elsey
- Louisiana Department of Wildlife and Fisheries, Rockefeller Wildlife Refuge, Grand Chenier, LA 70643, USA
| | - Mary T. Mendonca
- Department of Biological Sciences, Auburn University, Auburn, AL 36849, USA
| | | |
Collapse
|
15
|
Wallace MA, Aguirre NW, Marcotte GR, Marshall AG, Baehr LM, Hughes DC, Hamilton KL, Roberts MN, Lopez‐Dominguez JA, Miller BF, Ramsey JJ, Baar K. The ketogenic diet preserves skeletal muscle with aging in mice. Aging Cell 2021; 20:e13322. [PMID: 33675103 PMCID: PMC8045940 DOI: 10.1111/acel.13322] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 01/11/2021] [Accepted: 01/23/2021] [Indexed: 12/20/2022] Open
Abstract
The causes of the decline in skeletal muscle mass and function with age, known as sarcopenia, are poorly understood. Nutrition (calorie restriction) interventions impact many cellular processes and increase lifespan and preserve muscle mass and function with age. As we previously observed an increase in life span and muscle function in aging mice on a ketogenic diet (KD), we aimed to investigate the effect of a KD on the maintenance of skeletal muscle mass with age and the potential molecular mechanisms of this action. Twelve‐month‐old mice were assigned to an isocaloric control or KD until 16 or 26 months of age, at which time skeletal muscle was collected for evaluating mass, morphology, and biochemical properties. Skeletal muscle mass was significantly greater at 26 months in the gastrocnemius of mice on the KD. This result in KD mice was associated with a shift in fiber type from type IIb to IIa fibers and a range of molecular parameters including increased markers of NMJ remodeling, mitochondrial biogenesis, oxidative metabolism, and antioxidant capacity, while decreasing endoplasmic reticulum (ER) stress, protein synthesis, and proteasome activity. Overall, this study shows the effectiveness of a long‐term KD in mitigating sarcopenia. The diet preferentially preserved oxidative muscle fibers and improved mitochondrial and antioxidant capacity. These adaptations may result in a healthier cellular environment, decreasing oxidative and ER stress resulting in less protein turnover. These shifts allow mice to better maintain muscle mass and function with age.
Collapse
Affiliation(s)
- Marita A. Wallace
- Department of Neurobiology, Physiology and Behavior University of California Davis CA USA
- CellMet Performance Health Perth WA Australia
| | - Nicholas W. Aguirre
- Department of Neurobiology, Physiology and Behavior University of California Davis CA USA
| | - George R. Marcotte
- Department of Neurobiology, Physiology and Behavior University of California Davis CA USA
| | - Andrea G. Marshall
- Department of Neurobiology, Physiology and Behavior University of California Davis CA USA
| | - Leslie M. Baehr
- Department of Neurobiology, Physiology and Behavior University of California Davis CA USA
| | - David C. Hughes
- Department of Neurobiology, Physiology and Behavior University of California Davis CA USA
| | - Karyn L. Hamilton
- Department of Health and Exercise Science Colorado State University Fort Collins CO USA
| | - Megan N. Roberts
- Department of Molecular Biosciences School of Veterinary Medicine University of California Davis CA USA
| | | | - Benjamin F. Miller
- Aging and Metabolism Research Program Oklahoma Medical Research Foundation Oklahoma City OK USA
| | - Jon J. Ramsey
- Department of Molecular Biosciences School of Veterinary Medicine University of California Davis CA USA
| | - Keith Baar
- Department of Neurobiology, Physiology and Behavior University of California Davis CA USA
- Department of Physiology and Membrane Biology School of Medicine University of California Davis CA USA
| |
Collapse
|
16
|
Zhou Z, Hagopian K, López-Domínguez JA, Kim K, Jasoliya M, Roberts MN, Cortopassi GA, Showalter MR, Roberts BS, González-Reyes JA, Baar K, Rutkowsky J, Ramsey JJ. A ketogenic diet impacts markers of mitochondrial mass in a tissue specific manner in aged mice. Aging (Albany NY) 2021; 13:7914-7930. [PMID: 33735837 PMCID: PMC8034930 DOI: 10.18632/aging.202834] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Accepted: 02/16/2021] [Indexed: 12/14/2022]
Abstract
Declines in mitochondrial mass are thought to be a hallmark of mammalian aging, and a ketogenic diet (KD) may prevent the age-related decreases in mitochondrial content. The objective of this study was to investigate the impact of a KD on markers of mitochondrial mass. Mice were fed an isocaloric control diet (CD) or KD from 12 months of age. Tissues were collected after 1 month and 14 months of intervention, and a panel of commonly used markers of mitochondrial mass (mitochondrial enzyme activities and levels, mitochondrial to nuclear DNA ratio, and cardiolipin content) were measured. Our results showed that a KD stimulated activities of marker mitochondrial enzymes including citrate synthase, Complex I, and Complex IV in hindlimb muscle in aged mice. KD also increased the activity of citrate synthase and prevented an age-related decrease in Complex IV activity in aged brain. No other markers were increased in these tissues. Furthermore, the impacts of a KD on liver and kidney were mixed with no pattern indicative of a change in mitochondrial mass. In conclusion, results of the present study suggest that a KD induces tissue-specific changes in mitochondrial enzyme activities, or structure, rather than global changes in mitochondrial mass across tissues.
Collapse
Affiliation(s)
- Zeyu Zhou
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - Kevork Hagopian
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - José A López-Domínguez
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - Kyoungmi Kim
- Department of Public Health Sciences, School of Medicine, University of California, Davis, CA 95617, USA
| | - Mittal Jasoliya
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - Megan N Roberts
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - Gino A Cortopassi
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - Megan R Showalter
- NIH-West Coast Metabolomics Center, University of California, Davis, CA 95616, USA
| | - Bryan S Roberts
- NIH-West Coast Metabolomics Center, University of California, Davis, CA 95616, USA
| | - José A González-Reyes
- Department of Cell Biology, Physiology and Immunology, Campus de Excelencia Internacional Agroalimentario, ceiA3, University of Córdoba, Córdoba, Spain
| | - Keith Baar
- Department of Neurobiology, Physiology, and Behavior, University of California, Davis, CA 95616, USA
| | - Jennifer Rutkowsky
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - Jon J Ramsey
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| |
Collapse
|
17
|
Stefan M, Sharp M, Gheith R, Lowery R, Wilson J. The Effect of Exogenous Beta-Hydroxybutyrate Salt Supplementation on Metrics of Safety and Health in Adolescents. Nutrients 2021; 13:854. [PMID: 33807731 PMCID: PMC8000900 DOI: 10.3390/nu13030854] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 02/23/2021] [Accepted: 03/03/2021] [Indexed: 12/19/2022] Open
Abstract
The ketogenic diet is a high-fat, very low-carbohydrate, moderate-protein diet that will induce a state of ketosis, but because of its restrictive nature, it may be difficult to adhere to, especially in adolescents. Supplementing with exogenous beta-hydroxybutyrate salts may induce a state of temporary ketosis without any undesirable side effects, thereby promoting the benefits of ketosis and minimizing adherence requirements to a ketogenic diet. To date, beta-hydroxybutyrate supplementation in healthy adolescents has not been explored. Therefore, the purpose of this study was to examine the safety of exogenous beta-hydroxybutyrate salt supplementation in a healthy adolescent population. In the present study, 22 healthy male and female adolescents consumed 3.75 g of beta-hydroxybutyrate salts or maltodextrin placebo twice daily for 90 days. Comprehensive blood safety analysis, bone densitometry, happiness and emotional intelligence surveys, and blood pressure were assessed at Pre, Day 45, and Day 90. There were no significant differences detected in subjects supplementing with beta-hydroxybutyrate salts, indicating that exogenous beta-hydroxybutyrate salts had no detrimental impact on fasting blood safety metrics, bone density, happiness, emotional intelligence, or blood pressure. We conclude that supplementing with exogenous beta-hydroxybutyrate salts is safe and well-tolerated by healthy adolescents.
Collapse
Affiliation(s)
- Matthew Stefan
- The Applied Science and Performance Institute, Research Division, Tampa, FL 33607, USA; (M.S.); (R.G.); (R.L.); (J.W.)
| | | | | | | | | |
Collapse
|
18
|
Porcelli S, Rasica L, Ferguson BS, Kavazis AN, McDonald J, Hogan MC, Grassi B, Gladden LB. Effect of acute nitrite infusion on contractile economy and metabolism in isolated skeletal muscle in situ during hypoxia. J Physiol 2021; 598:2371-2384. [PMID: 32537774 DOI: 10.1113/jp279789] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 04/14/2020] [Indexed: 01/02/2023] Open
Abstract
KEY POINTS Increased plasma nitrite concentrations may have beneficial effects on skeletal muscle function. The physiological basis explaining these observations has not been clearly defined and it may involve positive effects on muscle contraction force, microvascular O2 delivery and skeletal muscle oxidative metabolism. In the isolated canine gastrocnemius model, we evaluated the effects of acute nitrite infusion on muscle force and skeletal muscle oxidative metabolism. Under hypoxic conditions, but in the presence of normal convective O2 delivery, an elevated plasma nitrite concentration affects neither muscle force, nor muscle contractile economy. In accordance with previous results suggesting limited or no effects of nitrate/nitrite administrations in highly oxidative and highly perfused muscle, our data suggest that neither mitochondrial respiration, nor muscle force generation are affected by acute increased concentrations of NO precursors in hypoxia. ABSTRACT Contrasting findings have been reported concerning the effects of augmented nitric oxide (NO) on skeletal muscle force production and oxygen consumption ( V ̇ O 2 ). The present study examined skeletal muscle mitochondrial respiration and contractile economy in an isolated muscle preparation during hypoxia (but normal convective O2 delivery) with nitrite infusion. Isolated canine gastrocnemius muscles in situ (n = 8) were studied during 3 min of electrically stimulated isometric tetanic contractions corresponding to ∼35% of V ̇ O 2 peak . During contractions, sodium nitrite (NITRITE) or sodium chloride (SALINE) was infused into the popliteal artery. V ̇ O 2 was calculated from the Fick principle. Experiments were carried out in hypoxia ( F I O 2 = 0.12), whereas convective O2 delivery was maintained at normal levels under both conditions by pump-driven blood flow ( Q ̇ ). Muscle biopsies were taken and mitochondrial respiration was evaluated by respirometry. Nitrite infusion significantly increased both nitrite and nitrate concentrations in plasma. No differences in force were observed between conditions. V ̇ O 2 was not significantly different between NITRITE (6.1 ± 1.8 mL 100 g-1 min-1 ) and SALINE (6.2 ± 1.8 mL 100 g-1 min-1 ), even after being 'normalized' per unit of developed force (muscle contractile economy). No differences between conditions were found for maximal ADP-stimulated mitochondrial respiration (both for complex I and complex II), leak respiration and oxidative phosphorylation coupling. In conclusion, in the absence of changes in convective O2 delivery, muscle force, muscle contractile economy and mitochondrial respiration were not affected by acute infusion of nitrite. The previously reported positive effects of elevated plasma nitrite concentrations are presumably mediated by the increased microvascular O2 availability.
Collapse
Affiliation(s)
- Simone Porcelli
- Institute of Biomedical Technologies, National Research Council, Segrate, Italy.,Department of Molecular Medicine, University of Pavia, Pavia, Italy
| | - Letizia Rasica
- Institute of Biomedical Technologies, National Research Council, Segrate, Italy.,Department of Biomedical Sciences for Health, University of Milan, Milan, Italy
| | | | | | - James McDonald
- School of Kinesiology, Auburn University, Auburn, AL, USA
| | - Michael C Hogan
- Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Bruno Grassi
- Department of Medicine, University of Udine, Udine, Italy
| | | |
Collapse
|
19
|
Abstract
: Neurological coordination is essential for performing biological and mechanical activities achieved by the cooperation of biomolecules such as carbohydrates, lipids, and proteins. It plays an important role in energy production, which can be fascinatingly improved by ketone bodies. Ketone bodies are small, water-soluble lipid molecules by shifting the glycolytic phase KBs directly enters into the tricarboxylic acid cycle for ATP synthesis. It leads to the production of much more energy levels than a single molecule of glucose. Therefore, it could have a profound effect on neuro-metabolism as well as bioenergetics of ATP production. These neuro-enhancement properties are useful for epilepsy, Alzheimer's, and several neurocognitive disorders treatment. Interestingly, the cancer cells cannot use it for efficiently energy production results in decreasing cancer cells viability. This review summarized ketone bodies generation, related imperative effects on normal cells, and more importantly its application in various neurological disorders treatment by rising neuronal functions.
Collapse
|
20
|
Morris G, Puri BK, Carvalho A, Maes M, Berk M, Ruusunen A, Olive L. Induced Ketosis as a Treatment for Neuroprogressive Disorders: Food for Thought? Int J Neuropsychopharmacol 2020; 23:366-384. [PMID: 32034911 PMCID: PMC7311648 DOI: 10.1093/ijnp/pyaa008] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 01/05/2020] [Accepted: 02/06/2020] [Indexed: 12/12/2022] Open
Abstract
Induced ketosis (or ketone body ingestion) can ameliorate several changes associated with neuroprogressive disorders, including schizophrenia, bipolar disorder, and major depressive disorder. Thus, the effects of glucose hypometabolism can be bypassed through the entry of beta-hydroxybutyrate, providing an alternative source of energy to glucose. The weight of evidence suggests that induced ketosis reduces levels of oxidative stress, mitochondrial dysfunction, and inflammation-core features of the above disorders. There are also data to suggest that induced ketosis may be able to target other molecules and signaling pathways whose levels and/or activity are also known to be abnormal in at least some patients suffering from these illnesses such as peroxisome proliferator-activated receptors, increased activity of the Kelch-like ECH-associated protein/nuclear factor erythroid 2-related factor 2, Sirtuin-1 nuclear factor-κB p65, and nicotinamide adenine dinucleotide (NAD). This review explains the mechanisms by which induced ketosis might reduce mitochondrial dysfunction, inflammation, and oxidative stress in neuropsychiatric disorders and ameliorate abnormal levels of molecules and signaling pathways that also appear to contribute to the pathophysiology of these illnesses. This review also examines safety data relating to induced ketosis over the long term and discusses the design of future studies.
Collapse
Affiliation(s)
- Gerwyn Morris
- The Institute for Mental and Physical Health and Clinical Translation, School of Medicine, Deakin University, Australia
| | - Basant K Puri
- C.A.R., Cambridge, United Kingdom,Hammersmith Hospital, London, United Kingdom
| | - Andre Carvalho
- Centre for Addiction and Mental Health (CAMH), Toronto, ON, Canada,Department of Psychiatry, University of Toronto, Toronto, ON, Canada
| | - Michael Maes
- Department of Psychiatry and Medical Psychology, Medical Faculty, Medical University of Plovdiv, Plovdiv, Bulgaria,Department of Psychiatry, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Michael Berk
- The Institute for Mental and Physical Health and Clinical Translation, School of Medicine, Deakin University, Australia,Orygen, The National Centre of Excellence in Youth Mental Health, the Department of Psychiatry, and the Florey Institute for Neuroscience and Mental Health, University of Melbourne, Australia,Correspondence: Michael Berk, PO Box 281 Geelong, Victoria 3220 Australia ()
| | - Anu Ruusunen
- The Institute for Mental and Physical Health and Clinical Translation, School of Medicine, Deakin University, Australia
| | - Lisa Olive
- The Institute for Mental and Physical Health and Clinical Translation, School of Medicine, Deakin University, Australia
| |
Collapse
|
21
|
Morris G, Maes M, Berk M, Carvalho AF, Puri BK. Nutritional ketosis as an intervention to relieve astrogliosis: Possible therapeutic applications in the treatment of neurodegenerative and neuroprogressive disorders. Eur Psychiatry 2020; 63:e8. [PMID: 32093791 PMCID: PMC8057392 DOI: 10.1192/j.eurpsy.2019.13] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Nutritional ketosis, induced via either the classical ketogenic diet or the use of emulsified medium-chain triglycerides, is an established treatment for pharmaceutical resistant epilepsy in children and more recently in adults. In addition, the use of oral ketogenic compounds, fractionated coconut oil, very low carbohydrate intake, or ketone monoester supplementation has been reported to be potentially helpful in mild cognitive impairment, Parkinson’s disease, schizophrenia, bipolar disorder, and autistic spectrum disorder. In these and other neurodegenerative and neuroprogressive disorders, there are detrimental effects of oxidative stress, mitochondrial dysfunction, and neuroinflammation on neuronal function. However, they also adversely impact on neurone–glia interactions, disrupting the role of microglia and astrocytes in central nervous system (CNS) homeostasis. Astrocytes are the main site of CNS fatty acid oxidation; the resulting ketone bodies constitute an important source of oxidative fuel for neurones in an environment of glucose restriction. Importantly, the lactate shuttle between astrocytes and neurones is dependent on glycogenolysis and glycolysis, resulting from the fact that the astrocytic filopodia responsible for lactate release are too narrow to accommodate mitochondria. The entry into the CNS of ketone bodies and fatty acids, as a result of nutritional ketosis, has effects on the astrocytic glutamate–glutamine cycle, glutamate synthase activity, and on the function of vesicular glutamate transporters, EAAT, Na+, K+-ATPase, Kir4.1, aquaporin-4, Cx34 and KATP channels, as well as on astrogliosis. These mechanisms are detailed and it is suggested that they would tend to mitigate the changes seen in many neurodegenerative and neuroprogressive disorders. Hence, it is hypothesized that nutritional ketosis may have therapeutic applications in such disorders.
Collapse
Affiliation(s)
- Gerwyn Morris
- Deakin University, IMPACT Strategic Research Centre, Barwon Health, School of Medicine, Geelong, Victoria, Australia
| | - Michael Maes
- Deakin University, IMPACT Strategic Research Centre, Barwon Health, School of Medicine, Geelong, Victoria, Australia.,Department of Psychiatry, Chulalongkorn University, Faculty of Medicine, Bangkok, Thailand
| | - Michael Berk
- Deakin University, IMPACT Strategic Research Centre, Barwon Health, School of Medicine, Geelong, Victoria, Australia.,Deakin University, CMMR Strategic Research Centre, School of Medicine, Geelong, Victoria, Australia.,Orygen, The National Centre of Excellence in Youth Mental Health, The Department of Psychiatry and the Florey Institute for Neuroscience and Mental Health, University of Melbourne, Parkville, Victoria, Australia
| | - André F Carvalho
- Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada.,Centre for Addiction and Mental Health (CAMH), Toronto, Ontario, Canada
| | | |
Collapse
|
22
|
McAllister MJ, Basham SA, Smith JW, Fountain BJ, Krings BM, Waldman HS. Effect of carbohydrate restriction on oxidative stress response to high‐intensity resistance exercise. TRANSLATIONAL SPORTS MEDICINE 2019. [DOI: 10.1002/tsm2.98] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Matthew John McAllister
- Metabolic and Applied Physiology Lab, Department of Health and Human Performance Texas State University San Marcos Texas
| | - Steven A. Basham
- Applied Physiology Lab, Department of Kinesiology Mississippi State University Starkville Mississippi
| | - JohnEric W. Smith
- Applied Physiology Lab, Department of Kinesiology Mississippi State University Starkville Mississippi
| | - Brent J. Fountain
- Department of Food Science, Nutrition, and Health Promotion Mississippi State University Starkville Mississippi
| | - Benjamin M. Krings
- Department of Health and Human Performance University of Wisconsin‐Platteville Platteville Wisconsin
| | - Hunter S. Waldman
- Human Performance Lab, Department of Kinesiology University of North Alabama Florence Alabama
| |
Collapse
|
23
|
Romero MA, Mumford PW, Roberson PA, Osburn SC, Parry HA, Kavazis AN, Gladden LB, Schwartz TS, Baker BA, Toedebusch RG, Childs TE, Booth FW, Roberts MD. Five months of voluntary wheel running downregulates skeletal muscle LINE-1 gene expression in rats. Am J Physiol Cell Physiol 2019; 317:C1313-C1323. [PMID: 31618076 DOI: 10.1152/ajpcell.00301.2019] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Transposable elements (TEs) are mobile DNA and constitute approximately half of the human genome. LINE-1 (L1) is the only active autonomous TE in the mammalian genome and has been implicated in a number of diseases as well as aging. We have previously reported that skeletal muscle L1 expression is lower following acute and chronic exercise training in humans. Herein, we used a rodent model of voluntary wheel running to determine whether long-term exercise training affects markers of skeletal muscle L1 regulation. Selectively bred high-running female Wistar rats (n = 11 per group) were either given access to a running wheel (EX) or not (SED) at 5 wk of age, and these conditions were maintained until 27 wk of age. Thereafter, mixed gastrocnemius tissue was harvested and analyzed for L1 mRNA expression and DNA content along with other L1 regulation markers. We observed significantly (P < 0.05) lower L1 mRNA expression, higher L1 DNA methylation, and less L1 DNA in accessible chromatin regions in EX versus SED rats. We followed these experiments with 3-h in vitro drug treatments in L6 myotubes to mimic transient exercise-specific signaling events. The AMP-activated protein kinase (AMPK) agonist 5-aminoimidazole-4-carboxamide ribonucleotide (AICAR; 4 mM) significantly decreased L1 mRNA expression in L6 myotubes. However, this effect was not facilitated through increased L1 DNA methylation. Collectively, these data suggest that long-term voluntary wheel running downregulates skeletal muscle L1 mRNA, and this may occur through chromatin modifications. Enhanced AMPK signaling with repetitive exercise bouts may also decrease L1 mRNA expression, although the mechanism of action remains unknown.
Collapse
Affiliation(s)
| | | | | | | | - Hailey A Parry
- School of Kinesiology, Auburn University, Auburn, Alabama
| | | | | | - Tonia S Schwartz
- Department of Biological Sciences, Auburn University, Auburn, Alabama
| | - Brent A Baker
- National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, West Virginia
| | - Ryan G Toedebusch
- Department of Biomedical Sciences, University of Missouri, Columbia, Missouri
| | - Thomas E Childs
- Department of Biomedical Sciences, University of Missouri, Columbia, Missouri
| | - Frank W Booth
- Department of Biomedical Sciences, University of Missouri, Columbia, Missouri
| | - Michael D Roberts
- School of Kinesiology, Auburn University, Auburn, Alabama.,Edward Via College of Osteopathic Medicine-Auburn Campus, Auburn, Alabama
| |
Collapse
|
24
|
Mumford PW, Romero MA, Osburn SC, Roberson PA, Vann CG, Mobley CB, Brown MD, Kavazis AN, Young KC, Roberts MD. Skeletal muscle LINE-1 retrotransposon activity is upregulated in older versus younger rats. Am J Physiol Regul Integr Comp Physiol 2019; 317:R397-R406. [PMID: 31188650 DOI: 10.1152/ajpregu.00110.2019] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Long interspersed element-1 (LINE-1) is a retrotransposon capable of replicating and inserting LINE-1 copies into the genome. Others have reported skeletal muscle LINE-1 markers are higher in older versus younger mice, but data are lacking in other species. Herein, gastrocnemius muscle from male Fischer 344 rats that were 3, 12, and 24 mo old (n = 9 per group) were analyzed for LINE-1 mRNA, DNA, promoter methylation and DNA accessibility. qPCR primers were designed for active (L1.3) and inactive (L1.Tot) LINE-1 elements as well as part of the ORF1 sequence. L1.3, L1.Tot, and ORF1 mRNAs were higher (P < 0.05) in 12/24 versus 3-mo-old rats. L1.3 DNA was higher in the 24-mo-old rats versus other groups, and ORF1 DNA was greater in 12/24 versus 3-mo-old rats. ORF1 protein was higher in 12/24 versus 3-mo-old rats. RNA-sequencing indicated mRNAs related to DNA methylation (Tet1) and histone acetylation (Hdac2) were lower in 24 versus 3-mo-old rats. L1.3 DNA accessibility was higher in 24-mo-old versus 3-mo-old rats. No age-related differences in nuclear histone deacetylase (HDAC) activity existed, although nuclear DNA methyltransferase (DNMT) activity was lower in 12/24 versus 3-mo-old rats (P < 0.05). In summary, markers of skeletal muscle LINE-1 activity increase across the age spectrum of rats, and this may be related to deficits in DNMT activity and/or increased LINE-1 DNA accessibility.
Collapse
Affiliation(s)
| | | | | | | | | | - Christopher B Mobley
- Department of Physiology, College of Medicine, University of Kentucky, Lexington, Kentucky
| | | | - Andreas N Kavazis
- School of Kinesiology, Auburn University, Auburn, Alabama.,Edward Via College of Osteopathic Medicine, Auburn, Alabama
| | - Kaelin C Young
- School of Kinesiology, Auburn University, Auburn, Alabama.,Edward Via College of Osteopathic Medicine, Auburn, Alabama
| | - Michael D Roberts
- School of Kinesiology, Auburn University, Auburn, Alabama.,Edward Via College of Osteopathic Medicine, Auburn, Alabama
| |
Collapse
|
25
|
Moore MP, Cunningham RP, Kelty TJ, Boccardi LR, Nguyen NY, Booth FW, Rector RS. Ketogenic diet in combination with voluntary exercise impacts markers of hepatic metabolism and oxidative stress in male and female Wistar rats. Appl Physiol Nutr Metab 2019; 45:35-44. [PMID: 31116955 DOI: 10.1139/apnm-2019-0042] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Ketogenic diets (KDs) are shown to benefit hepatic metabolism; however, their effect on the liver when combined with exercise is unknown. We investigated the effects of a KD versus a "western" diet (WD) on markers of hepatic lipid metabolism and oxidative stress in exercising rats. Male and female Wistar rats with access to voluntary running wheels were randomized to 3 groups (n = 8-14 per group): standard chow (SC; 17% fat), WD (42% fat), or KD (90.5% fat) for 7 weeks. Body fat percentage (BF%) was increased in WD and KD versus SC, although KD females displayed lower BF% versus WD (p ≤ 0.05). Liver triglycerides were higher in KD and WD versus SC but were attenuated in KD females versus WD (p ≤ 0.05). KD suppressed hepatic markers of de novo lipogenesis (fatty acid synthase, acetyl coenzyme A carboxylase) and increased markers of mitochondrial biogenesis/content (peroxisome proliferator activated receptor-1α, mitochondrial transcription factor A (TFAM), and citrate synthase activity). KD also increased hepatic glutathione peroxidase 1 and lowered oxidized glutathione. Female rats exhibited elevated hepatic markers of mitochondrial biogenesis (TFAM), mitophagy (light chain 3 II/I ratio, autophagy-related protein 12:5), and cellular energy homeostasis (phosphorylated 5'AMP-activated protein kinase/5'AMP-activated protein kinase) versus males. These data highlight that KD and exercise beneficially impacts hepatic metabolism and oxidative stress and merits further investigation. Novelty KD feeding combined with exercise improved hepatic oxidative stress, suppressed markers of de novo lipogenesis, and increased markers of mitochondrial content versus WD feeding. Males and females responded similarly to combined KD feeding and exercise. Female rats exhibited elevated hepatic markers of autophagy/mitophagy and energy homeostasis compared with male rats.
Collapse
Affiliation(s)
- Mary P Moore
- Research Service, Harry S Truman Memorial Veterans Medical Center, Columbia, MO 65201, USA.,Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO 65203, USA
| | - Rory P Cunningham
- Research Service, Harry S Truman Memorial Veterans Medical Center, Columbia, MO 65201, USA.,Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO 65203, USA
| | - Taylor J Kelty
- Biomedical Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Luigi R Boccardi
- Research Service, Harry S Truman Memorial Veterans Medical Center, Columbia, MO 65201, USA.,Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO 65203, USA.,Division of Gastroenterology and Hepatology, University of Missouri, Columbia, MO 65212, USA
| | - Nhu Y Nguyen
- Research Service, Harry S Truman Memorial Veterans Medical Center, Columbia, MO 65201, USA.,Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO 65203, USA
| | - Frank W Booth
- Biomedical Sciences, University of Missouri, Columbia, MO 65211, USA
| | - R Scott Rector
- Research Service, Harry S Truman Memorial Veterans Medical Center, Columbia, MO 65201, USA.,Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO 65203, USA.,Division of Gastroenterology and Hepatology, University of Missouri, Columbia, MO 65212, USA
| |
Collapse
|
26
|
Impact of Ketone Salt Containing Supplement on Cardiorespiratory and Oxidative Stress Response in Firefighters Exercising in Personal Protective Equipment. Asian J Sports Med 2019. [DOI: 10.5812/asjsm.82404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
|
27
|
Parry HA, Kephart WC, Mumford PW, Romero MA, Mobley CB, Zhang Y, Roberts MD, Kavazis AN. Ketogenic diet increases mitochondria volume in the liver and skeletal muscle without altering oxidative stress markers in rats. Heliyon 2018; 4:e00975. [PMID: 30533548 PMCID: PMC6260463 DOI: 10.1016/j.heliyon.2018.e00975] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 08/22/2018] [Accepted: 11/21/2018] [Indexed: 01/27/2023] Open
Abstract
Ketogenic diets (KD) consist of high fat, moderate protein and low carbohydrates. Studies have suggested that KD may influence oxidative stress by affecting mitochondrial quantity and/or quality, and perhaps lengthen lifespan. Therefore, we determined the effects of KD on multi-organ mitochondria volume and oxidative stress markers in rats. Ten month-old male Fisher 344 rats (n = 8 per group) were provided with one of two isocaloric diets: standard chow (SC) or KD. Rats were euthanized if: a) vitality scores exceeded a score of 16, b) rapid weight loss, or c) veterinarian deemed euthanasia necessary. The median lifespan of rats was higher in KD (762 days) compared to SC (624 days). Citrate synthase activity (i.e. estimate of mitochondria volume) was higher in the liver (p = 0.034) and gastrocnemius (p = 0.041) of KD compared to SC. Liver superoxide dismutase 1 and catalase antioxidant protein levels were higher in KD, albeit not significant (p = 0.094 and p = 0.062, respectively). No significant differences in protein levels of other antioxidants or markers of lipid and protein oxidative damage were observed in either the gastrocnemius, liver, or brain. In summary, KD increased mitochondria volume in liver and gastrocnemius and median lifespan in rats. Additionally, our data show that the increase in mitochondrial volume occurred without changes in oxidative damage or antioxidant protein levels in the gastrocnemius, liver, or brain.
Collapse
|
28
|
Finger JW, Hamilton MT, Kelley MD, Zhang Y, Kavazis AN, Glenn TC, Tuberville TD. Dietary Selenomethionine Administration and Its Effects on the American Alligator (Alligator mississippiensis): Oxidative Status and Corticosterone Levels. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2018; 75:37-44. [PMID: 29737374 DOI: 10.1007/s00244-018-0530-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Accepted: 04/21/2018] [Indexed: 06/08/2023]
Abstract
Selenium (Se) is an essential nutrient which in excess causes toxicity. The disposal of incompletely combusted coal, which often is rich in Se, into aquatic settling basins is increasing the risk of Se exposure worldwide. However, very few studies have looked at the physiological effects of Se exposure on long-lived, top trophic vertebrates, such as the American alligator (Alligator mississippiensis). During a 7-week period, alligators were fed one of three dietary treatments: mice injected with deionized water or mice injected with water containing 1000 or 2000 ppm selenomethionine (SeMet). One week after the last feeding alligators were bled within 3 min of capture for plasma corticosterone (CORT). A few days later, all alligators were euthanized and whole blood and tail tissue were harvested to measure oxidative damage, an antioxidant-associated transcription factor, and antioxidant enzymes [glutathione peroxidase-1 (GPX1), superoxide dismutase-1 (SOD1), and SOD2] by Western blotting. There was a dose-dependent increase in baseline CORT levels in alligators administered SeMet. Except for blood SOD2 levels, SeMet treatment had no effect (p > 0.05 for all) on oxidative status: oxidative damage, GPX1, SOD1, and muscle SOD2 levels were similar among treatments. Our results illustrate that high levels of Se may act as a stressor to crocodilians. Future studies should investigate further the physiological effects of Se accumulation in long-lived, top-trophic vertebrates.
Collapse
Affiliation(s)
- John W Finger
- Department of Environmental Health Science, University of Georgia, Athens, GA, 30602, USA.
- Savannah River Ecology Laboratory, University of Georgia, PO Drawer E, Aiken, SC, 29802, USA.
- Department of Biological Sciences, Auburn University, Auburn, AL, 36849, USA.
| | - Matthew T Hamilton
- Savannah River Ecology Laboratory, University of Georgia, PO Drawer E, Aiken, SC, 29802, USA
| | - Meghan D Kelley
- Department of Biological Sciences, Auburn University, Auburn, AL, 36849, USA
| | - Yufeng Zhang
- Department of Biological Sciences, Auburn University, Auburn, AL, 36849, USA
- Buck Institute for Research on Aging, Novato, CA, 94945, USA
| | | | - Travis C Glenn
- Department of Environmental Health Science, University of Georgia, Athens, GA, 30602, USA
| | - Tracey D Tuberville
- Savannah River Ecology Laboratory, University of Georgia, PO Drawer E, Aiken, SC, 29802, USA
| |
Collapse
|
29
|
An 8-Week Ketogenic Low Carbohydrate, High Fat Diet Enhanced Exhaustive Exercise Capacity in Mice. Nutrients 2018; 10:nu10060673. [PMID: 29799502 PMCID: PMC6024661 DOI: 10.3390/nu10060673] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 05/15/2018] [Accepted: 05/21/2018] [Indexed: 01/02/2023] Open
Abstract
Current fueling tactics for endurance exercise encourage athletes to ingest a high carbohydrate diet. However, athletes are not generally encouraged to use fat, the largest energy reserve in the human body. A low carbohydrate, high fat ketogenic diet (KD) is a nutritional approach ensuring that the body utilizes lipids. Although KD has been associated with weight-loss, enhanced fat utilization in muscle and other beneficial effects, there is currently no clear proof whether it could lead to performance advantage. To evaluate the effects of KD on endurance exercise capacity, we studied the performance of mice subjected to a running model after consuming KD for eight weeks. Weight dropped dramatically in KD-feeding mice, even though they ate more calories. KD-feeding mice showed enhanced running time without aggravated muscle injury. Blood biochemistry and correlation analysis indicated the potential mechanism is likely to be a keto-adaptation enhanced capacity to transport and metabolize fat. KD also showed a potential preventive effect on organ injury caused by acute exercise, although KD failed to exert protection from muscle injury. Ultimately, KD may contribute to prolonged exercise capacity.
Collapse
|
30
|
Zhang Y, Brasher AL, Park NR, Taylor HA, Kavazis AN, Hood WR. High activity before breeding improves reproductive performance by enhancing mitochondrial function and biogenesis. J Exp Biol 2018; 221:jeb177469. [PMID: 29487162 PMCID: PMC5963833 DOI: 10.1242/jeb.177469] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 02/19/2018] [Indexed: 12/11/2022]
Abstract
Understanding of physiological responses of organisms is typically based on data collected during an isolated event. Although many fundamental insights have been gained from these studies, evaluating the response to a single event ignores the fact that each individual has experienced a unique set of events throughout its life that may have altered its physiology. The idea that prior experiences can influence subsequent performance is known as a carry-over effect. Carry-over effects may explain much of the variation in performance found among individuals. For example, high physical activity has been shown to improve mitochondrial respiratory function and biogenesis and reduce oxidative stress, and has been linked to improved health and longevity. In this study, we asked whether the bioenergetic differences between active and inactive individuals carry over to impact performance in a subsequent reproductive event and alter a female's reproductive outcome. Female mice that had access to a running wheel for a month before mating gave birth to a larger litter and weaned a heavier litter, indicating that high physical activity had a positive carry-over effect to reproduction. Mice that ran also displayed higher mitochondrial respiration and biogenesis with no changes in endogenous antioxidant enzymes. These results provide a mechanistic framework for how the conditions that animals experience before breeding can impact reproductive outcomes.
Collapse
Affiliation(s)
- Yufeng Zhang
- Department of Biological Sciences, Auburn University, Auburn, AL 36830, USA
| | - Adam L Brasher
- Department of Biological Sciences, Auburn University, Auburn, AL 36830, USA
| | - Noel R Park
- Department of Biological Sciences, Auburn University, Auburn, AL 36830, USA
| | - Halie A Taylor
- Department of Biological Sciences, Auburn University, Auburn, AL 36830, USA
| | | | - Wendy R Hood
- Department of Biological Sciences, Auburn University, Auburn, AL 36830, USA
| |
Collapse
|
31
|
Hyatt HW, Zhang Y, Hood WR, Kavazis AN. Changes in Metabolism, Mitochondrial Function, and Oxidative Stress Between Female Rats Under Nonreproductive and 3 Reproductive Conditions. Reprod Sci 2018; 26:114-127. [PMID: 29621953 DOI: 10.1177/1933719118766264] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Women who do not lactate display increased incidence of obesity, type II diabetes, and cancer. Stuebe and Rich-Edwards proposed that these effects occur because physiological changes that ensue during pregnancy are not reversed without lactation. To empirically test this hypothesis, we compared markers of metabolism, mitochondrial function, and oxidative stress between 4 groups of Sprague-Dawley rats: (1) nonreproductive (NR) rats, (2) rats killed at day 20 of gestation, (3) rats that gave birth but were not allowed to suckle their pups (nonlactating), and (4) rats that suckled their young for 14 days. Nonlactating females displayed higher body fat compared to all other groups. Peroxisome proliferator-activated receptor δ (PPARδ) in skeletal muscle and white adipose tissue of nonlactating rats was lower than the other groups. The PPARδ is associated with lipid metabolism suggesting that the higher fat mass in nonlactating females was not associated with the retention of a physiological state that was set during pregnancy but instead an independent drop in PPARδ. Relative mitochondrial respiratory function and complex activity in the liver and skeletal muscle of nonlactating mice were not predictive of higher body mass, and measures of oxidative stress displayed minimal variation between groups.
Collapse
Affiliation(s)
- Hayden W Hyatt
- 1 School of Kinesiology, Auburn University, Auburn, AL, USA
| | - Yufeng Zhang
- 2 Department of Biological Sciences, Auburn University, Auburn, AL, USA
| | - Wendy R Hood
- 2 Department of Biological Sciences, Auburn University, Auburn, AL, USA
| | | |
Collapse
|
32
|
Veyrat-Durebex C, Reynier P, Procaccio V, Hergesheimer R, Corcia P, Andres CR, Blasco H. How Can a Ketogenic Diet Improve Motor Function? Front Mol Neurosci 2018; 11:15. [PMID: 29434537 PMCID: PMC5790787 DOI: 10.3389/fnmol.2018.00015] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 01/10/2018] [Indexed: 12/12/2022] Open
Abstract
A ketogenic diet (KD) is a normocaloric diet composed by high fat (80-90%), low carbohydrate, and low protein consumption that induces fasting-like effects. KD increases ketone body (KBs) production and its concentration in the blood, providing the brain an alternative energy supply that enhances oxidative mitochondrial metabolism. In addition to its profound impact on neuro-metabolism and bioenergetics, the neuroprotective effect of specific polyunsaturated fatty acids and KBs involves pleiotropic mechanisms, such as the modulation of neuronal membrane excitability, inflammation, or reactive oxygen species production. KD is a therapy that has been used for almost a century to treat medically intractable epilepsy and has been increasingly explored in a number of neurological diseases. Motor function has also been shown to be improved by KD and/or medium-chain triglyceride diets in rodent models of Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis, and spinal cord injury. These studies have proposed that KD may induce a modification in synaptic morphology and function, involving ionic channels, glutamatergic transmission, or synaptic vesicular cycling machinery. However, little is understood about the molecular mechanisms underlying the impact of KD on motor function and the perspectives of its use to acquire the neuromuscular effects. The aim of this review is to explore the conditions through which KD might improve motor function. First, we will describe the main consequences of KD exposure in tissues involved in motor function. Second, we will report and discuss the relevance of KD in pre-clinical and clinical trials in the major diseases presenting motor dysfunction.
Collapse
Affiliation(s)
- Charlotte Veyrat-Durebex
- Département de Biochimie et Génétique, Centre Hospitalier Universitaire, Angers, France
- INSERM 1083, CNRS, Equipe Mitolab, Institut MITOVASC, UMR 6015, Université d’Angers, Angers, France
| | - Pascal Reynier
- Département de Biochimie et Génétique, Centre Hospitalier Universitaire, Angers, France
- INSERM 1083, CNRS, Equipe Mitolab, Institut MITOVASC, UMR 6015, Université d’Angers, Angers, France
| | - Vincent Procaccio
- Département de Biochimie et Génétique, Centre Hospitalier Universitaire, Angers, France
- INSERM 1083, CNRS, Equipe Mitolab, Institut MITOVASC, UMR 6015, Université d’Angers, Angers, France
| | | | - Philippe Corcia
- INSERM U930, Université François Rabelais de Tours, Tours, France
- Service de Neurologie, Centre Hospitalier Universitaire de Tours, Tours, France
| | - Christian R. Andres
- INSERM U930, Université François Rabelais de Tours, Tours, France
- Laboratoire de Biochimie et Biologie Moléculaire, Centre Hospitalier Universitaire de Tours, Tours, France
| | - Hélène Blasco
- INSERM 1083, CNRS, Equipe Mitolab, Institut MITOVASC, UMR 6015, Université d’Angers, Angers, France
- INSERM U930, Université François Rabelais de Tours, Tours, France
- Laboratoire de Biochimie et Biologie Moléculaire, Centre Hospitalier Universitaire de Tours, Tours, France
| |
Collapse
|
33
|
Hyatt HW, Zhang Y, Hood WR, Kavazis AN. Physiological, mitochondrial, and oxidative stress differences in the presence or absence of lactation in rats. Reprod Biol Endocrinol 2018; 16:2. [PMID: 29316934 PMCID: PMC5761103 DOI: 10.1186/s12958-017-0317-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Accepted: 12/25/2017] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Human epidemiological data show that breastfeeding reduces the mother's probability of developing several disease conditions, including obesity and type II diabetes compared to mothers that give birth but do not breastfeed. The goal of this investigation was to characterize how lactation changes a rat's body composition, metabolism, mitochondrial function, and oxidative stress. METHODS Ten-week old female Sprague-Dawley rats were divided into three groups (n = 8 per group): 1) non-reproductive (NR), 2) those that were allowed to mate and give birth, but were not allowed to suckle their pups (PP), and 3) those that were allowed to mate and give birth, and suckled their young until weaning at 21 days (PL). All animals were sacrificed at a time corresponding to 7 days following the weaning of pups (i.e., day 28 postpartum). RESULTS The body mass of PL rats was similar to NR rats, but the body mass of PP rats was higher than NR rats. Importantly, PL rats had lower retroperitoneal white adipose tissue mass compared to both NR and PP rats. The difference in fat mass was accompanied by higher protein levels of PPARδ, SOD2, and reduced oxidative damage. Furthermore, the liver of PL rats had higher mitochondrial function with NADH-linked substrates, and higher expression of PGC-1α, PPARδ, and SOD2. CONCLUSIONS These acute differences observed between female rats that did and did not suckle their young could be used as the foundation for future research investigating the prolonged and sustained benefits of lactation.
Collapse
Affiliation(s)
- Hayden W. Hyatt
- 0000 0001 2297 8753grid.252546.2School of Kinesiology, Auburn University, 301 Wire Road, Auburn, Alabama 36849 USA
| | - Yufeng Zhang
- 0000 0001 2297 8753grid.252546.2Department of Biological Sciences, Auburn University, Auburn, AL USA
| | - Wendy R. Hood
- 0000 0001 2297 8753grid.252546.2Department of Biological Sciences, Auburn University, Auburn, AL USA
| | - Andreas N. Kavazis
- 0000 0001 2297 8753grid.252546.2School of Kinesiology, Auburn University, 301 Wire Road, Auburn, Alabama 36849 USA
| |
Collapse
|
34
|
Lactation has persistent effects on a mother's metabolism and mitochondrial function. Sci Rep 2017; 7:17118. [PMID: 29215072 PMCID: PMC5719424 DOI: 10.1038/s41598-017-17418-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Accepted: 11/24/2017] [Indexed: 12/27/2022] Open
Abstract
Human epidemiological data show that breastfeeding reduces the prevalence of numerous diseases compared to mothers that give birth but do not participate in lactation. The goal of this study was to determine if differences in metabolism, mitochondrial function, and oxidative stress underlie the protective phenotype found in lactating women. Ten-week old female Sprague-Dawley rats were divided into three groups (n = 8 per group): 1) rats that did not reproduce (NR), 2) rats that were allowed to mate and become pregnant but did not suckle their pups after giving birth (NL), and 3) rats that were allowed to mate and become pregnant and suckled their pups for 21 days before weaning (L). All animals were sacrificed at approximately 7 months of age, a time corresponding to 15 weeks after the NL and L females gave birth. Liver mitochondrial respiration was higher in L rats when using NADH-linked substrates and these rats had lower serum glucose concentration. Additionally, the L group exhibited changes in liver, skeletal muscle, and white adipose tissue PPARδ protein levels that may, in part, explain the observed lower serum glucose concentration. These novel animal findings provide evidence of differences in metabolic processes that persist months after weaning.
Collapse
|
35
|
Finger JW, Botero J, Zhang Y, Still SE, Hoffman AJ, Kavazis AN, Cristol DA, Wada H. No Effect of Lifelong Methylmercury Exposure on Oxidative Status in Zebra Finches (Taeniopygia guttata): A Demonstration of Methylmercury-Induced Selection? BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2017; 99:668-672. [PMID: 29080113 DOI: 10.1007/s00128-017-2202-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Accepted: 10/25/2017] [Indexed: 06/07/2023]
Abstract
Songbirds exposed to methylmercury (MeHg) often exhibit reduced reproductive success and cognitive abilities. To better understand whether oxidative stress plays a role, we dosed zebra finches (Taeniopygia guttata) with a contaminated (1.2 ppm MeHg-cysteine) or control diet for their entire lives, including during development in the egg. Levels of antioxidant enzymes [superoxide dismutase (SOD1 and SOD2)], oxidative damage (4-hydroxynonenal; 4-HNE), and antioxidant transcription factors [nuclear factor (erythroid-derived 2)-like 2; Nrf2] were measured in the liver and pectoralis muscle of adults. MeHg treatment did not affect levels of 4-HNE or liver SOD2 or Nrf2. Birds in the MeHg treatment differed significantly from controls in pectoralis SOD1 and Nrf2, and tended to differ in liver SOD1 and pectoralis SOD2; however, we detected no overall pattern of effect of MeHg on oxidative status in dosed finches. We suspect that this is a consequence of the differential survival of MeHg-tolerant birds.
Collapse
Affiliation(s)
- John W Finger
- Department of Biological Sciences, Auburn University, Auburn, AL, 36849, USA.
| | - Juan Botero
- Department of Biology, College of William & Mary, Williamsburg, VA, 23185, USA
| | - Yufeng Zhang
- Department of Biological Sciences, Auburn University, Auburn, AL, 36849, USA
| | - Shelby E Still
- Department of Biological Sciences, Auburn University, Auburn, AL, 36849, USA
| | - Alexander J Hoffman
- Department of Biological Sciences, Auburn University, Auburn, AL, 36849, USA
| | | | - Daniel A Cristol
- Department of Biology, College of William & Mary, Williamsburg, VA, 23185, USA
| | - Haruka Wada
- Department of Biological Sciences, Auburn University, Auburn, AL, 36849, USA
| |
Collapse
|
36
|
Zhang Y, Humes F, Almond G, Kavazis AN, Hood WR. A mitohormetic response to pro-oxidant exposure in the house mouse. Am J Physiol Regul Integr Comp Physiol 2017; 314:R122-R134. [PMID: 28931544 DOI: 10.1152/ajpregu.00176.2017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Mitochondria are hypothesized to display a biphasic response to reactive oxygen species (ROS) exposure. In this study, we evaluated the time course changes in mitochondrial performance and oxidative stress in house mice following X-irradiation. Forty-eight mice were equally divided among six groups, including a nonirradiated control and five experimental groups that varied in time between X-ray exposure and euthanasia (1 h and 1, 4, 7, and 10 days after X-irradiation). We measured parameters associated with mitochondrial respiratory function and ROS emission from isolated liver and skeletal muscle mitochondria and levels of oxidative damage and antioxidants in liver, skeletal muscle, and heart tissues. Mitochondrial function dropped initially after X-irradiation but recovered quickly and was elevated 10 days after the exposure. Hydrogen peroxide production, lipid peroxidation, and protein carbonylation showed inverse U-shaped curves, with levels returning to control or lower than control, 10 days after X-irradiation. Enzymatic antioxidants and markers for mitochondrial biogenesis exhibited a tissue-specific response after irradiation. These data provide the first chronological description of the mitohormetic response after a mild dose of irradiation and highlight the protective response that cells display to ROS exposure. This study also provides valuable information and application for future mitochondrial and oxidative stress studies in numerous physiological settings.
Collapse
Affiliation(s)
- Yufeng Zhang
- Department of Biological Science, Auburn University , Auburn, Alabama
| | - Frances Humes
- Department of Biological Science, Auburn University , Auburn, Alabama
| | - Gregory Almond
- Department of Clinical Sciences, College of Veterinary Medicine, Auburn University , Auburn, Alabama
| | | | - Wendy R Hood
- Department of Biological Science, Auburn University , Auburn, Alabama
| |
Collapse
|
37
|
Kephart WC, Mumford PW, Mao X, Romero MA, Hyatt HW, Zhang Y, Mobley CB, Quindry JC, Young KC, Beck DT, Martin JS, McCullough DJ, D'Agostino DP, Lowery RP, Wilson JM, Kavazis AN, Roberts MD. The 1-Week and 8-Month Effects of a Ketogenic Diet or Ketone Salt Supplementation on Multi-Organ Markers of Oxidative Stress and Mitochondrial Function in Rats. Nutrients 2017; 9:nu9091019. [PMID: 28914762 PMCID: PMC5622779 DOI: 10.3390/nu9091019] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Revised: 09/11/2017] [Accepted: 09/13/2017] [Indexed: 11/16/2022] Open
Abstract
We determined the short- and long-term effects of a ketogenic diet (KD) or ketone salt (KS) supplementation on multi-organ oxidative stress and mitochondrial markers. For short-term feedings, 4 month-old male rats were provided isocaloric amounts of KD (n = 10), standard chow (SC) (n = 10) or SC + KS (~1.2 g/day, n = 10). For long-term feedings, 4 month-old male rats were provided KD (n = 8), SC (n = 7) or SC + KS (n = 7) for 8 months and rotarod tested every 2 months. Blood, brain (whole cortex), liver and gastrocnemius muscle were harvested from all rats for biochemical analyses. Additionally, mitochondria from the brain, muscle and liver tissue of long-term-fed rats were analyzed for mitochondrial quantity (maximal citrate synthase activity), quality (state 3 and 4 respiration) and reactive oxygen species (ROS) assays. Liver antioxidant capacity trended higher in short-term KD- and SC + KS-fed versus SC-fed rats, and short-term KD-fed rats exhibited significantly greater serum ketones compared to SC + KS-fed rats indicating that the diet (not KS supplementation) induced ketonemia. In long term-fed rats: (a) serum ketones were significantly greater in KD- versus SC- and SC + KS-fed rats; (b) liver antioxidant capacity and glutathione peroxidase protein was significantly greater in KD- versus SC-fed rats, respectively, while liver protein carbonyls were lowest in KD-fed rats; and (c) gastrocnemius mitochondrial ROS production was significantly greater in KD-fed rats versus other groups, and this paralleled lower mitochondrial glutathione levels. Additionally, the gastrocnemius pyruvate-malate mitochondrial respiratory control ratio was significantly impaired in long-term KD-fed rats, and gastrocnemius mitochondrial quantity was lowest in these animals. Rotarod performance was greatest in KD-fed rats versus all other groups at 2, 4 and 8 months, although there was a significant age-related decline in performance existed in KD-fed rats which was not evident in the other two groups. In conclusion, short- and long-term KD improves select markers of liver oxidative stress compared to SC feeding, although long-term KD feeding may negatively affect skeletal muscle mitochondrial physiology.
Collapse
Affiliation(s)
- Wesley C Kephart
- School of Kinesiology, Auburn University, Auburn, AL 36849, USA.
| | - Petey W Mumford
- School of Kinesiology, Auburn University, Auburn, AL 36849, USA.
| | - Xuansong Mao
- School of Kinesiology, Auburn University, Auburn, AL 36849, USA.
| | - Matthew A Romero
- School of Kinesiology, Auburn University, Auburn, AL 36849, USA.
| | - Hayden W Hyatt
- School of Kinesiology, Auburn University, Auburn, AL 36849, USA.
| | - Yufeng Zhang
- Department of Biological Sciences, Auburn University, Auburn, AL 36849, USA.
| | | | - John C Quindry
- Department of Human Health Performance, University of Montana, Missoula, MT 59812, USA.
| | - Kaelin C Young
- School of Kinesiology, Auburn University, Auburn, AL 36849, USA.
- Department of Cell Biology and Physiology, Edward via College of Osteopathic Medicine-Auburn Campus, Auburn, AL 36849, USA.
| | - Darren T Beck
- School of Kinesiology, Auburn University, Auburn, AL 36849, USA.
- Department of Cell Biology and Physiology, Edward via College of Osteopathic Medicine-Auburn Campus, Auburn, AL 36849, USA.
| | - Jeffrey S Martin
- School of Kinesiology, Auburn University, Auburn, AL 36849, USA.
- Department of Cell Biology and Physiology, Edward via College of Osteopathic Medicine-Auburn Campus, Auburn, AL 36849, USA.
| | - Danielle J McCullough
- School of Kinesiology, Auburn University, Auburn, AL 36849, USA.
- Department of Cell Biology and Physiology, Edward via College of Osteopathic Medicine-Auburn Campus, Auburn, AL 36849, USA.
| | - Dominic P D'Agostino
- Department of Molecular Pharmacology and Physiology, University of South Florida, Tampa, FL 33620, USA.
| | - Ryan P Lowery
- Applied Sports Performance Institute, Tampa, FL 33607, USA.
| | - Jacob M Wilson
- Applied Sports Performance Institute, Tampa, FL 33607, USA.
| | - Andreas N Kavazis
- School of Kinesiology, Auburn University, Auburn, AL 36849, USA.
- Department of Cell Biology and Physiology, Edward via College of Osteopathic Medicine-Auburn Campus, Auburn, AL 36849, USA.
| | - Michael D Roberts
- School of Kinesiology, Auburn University, Auburn, AL 36849, USA.
- Department of Cell Biology and Physiology, Edward via College of Osteopathic Medicine-Auburn Campus, Auburn, AL 36849, USA.
| |
Collapse
|