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Abstract
Heart failure (HF) is associated with a considerable number of symptoms and significantly impaired health for humans, including reduced quality of life and physical functioning. Previous studies have indicated that miRNAs have important roles in regulating the development of HF. MiR-1180 is involved in the proliferation, migration, invasiveness, and chemoresistance of cancer cells; however, the underlying mechanisms and role of miR-1180 in the functioning of cardiomyocytes remains unclear. In this study, we found that miR-1180 promotes cell activity and cell cycle processes by driving energy generation through NKIRAS2, which declines over time during development. The expression of miR-1180 is down-regulated in cells subjected to hypoxia-reoxygenation, and use of an miR-1180 mimic significantly reduced myocardial injury and cell apoptosis. In addition, miR-1180 regulates the NFκB pathway through NKIRAS2 in cardiomyocytes. These findings suggest that miR-1180 maybe a novel therapeutic target for use in getting cardiomyocytes to re-enter the cell cycle as well as for cardiac repair following myocardial injury.
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Affiliation(s)
- Yuhui Ding
- Department of Emergency, Qingdao Haici Medical Group, Qingdao, China 266034
| | - Liyuan Bi
- Department of Emergency, Qingdao Haici Medical Group, Qingdao, China 266034
| | - Jun Wang
- Department of Emergency, Qingdao Haici Medical Group, Qingdao, China 266034.,Department of Emergency, Qingdao Haici Medical Group, Qingdao, China 266034
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2
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de Mello AH, Schraiber RDB, Goldim MPDS, Mathias K, Mendes C, Corrêa MEAB, Gomes ML, Silveira PCL, Schuck PF, Petronilho F, Rezin GT. Omega-3 polyunsaturated fatty acids have beneficial effects on visceral fat in diet-induced obesity model. Biochem Cell Biol 2019; 97:693-701. [PMID: 31774300 DOI: 10.1139/bcb-2018-0361] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2023] Open
Abstract
This study evaluated the effects of omega-3 polyunsaturated fatty acids (PUFAs) on oxidative stress and energy metabolism parameters in the visceral fat of a high-fat-diet induced obesity model. Energy intake, body mass, and visceral fat mass were also evaluated. Male Swiss mice received either a control diet (control group) or a high-fat diet (obese group) for 6 weeks. After this period, the groups were divided into control + saline, control + omega-3, obese + saline, and obese + omega-3, and to these groups 400 mg·(kg body mass)-1·day-1 of fish oil (or saline) was administered orally, for 4 weeks. Energy intake and body mass were monitored throughout the experiment. In the 10th week, the animals were euthanized and the visceral fat (mesenteric) was removed. Treatment with omega-3 PUFAs did not affect energy intake or body mass, but it did reduced visceral fat mass. In visceral fat, omega-3 PUFAs reduced oxidative damage and alleviated changes to the antioxidant defense system and the Krebs cycle. The mitochondrial respiratory chain was neither altered by obesity nor by omega-3 PUFAs. In conclusion, omega-3 PUFAs have beneficial effects on the visceral fat of obese mice because they mitigate changes caused by the consumption of a high-fat diet.
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Affiliation(s)
- Aline Haas de Mello
- Laboratório de Neurobiologia de Processos Inflamatórios e Metabólicos, Programa de Pós-Graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina, Tubarão, Santa Catarina, Brasil
| | - Rosiane de Bona Schraiber
- Laboratório de Neurobiologia de Processos Inflamatórios e Metabólicos, Programa de Pós-Graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina, Tubarão, Santa Catarina, Brasil
| | - Mariana Pereira de Souza Goldim
- Laboratório de Neurobiologia de Processos Inflamatórios e Metabólicos, Programa de Pós-Graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina, Tubarão, Santa Catarina, Brasil
| | - Khiany Mathias
- Laboratório de Neurobiologia de Processos Inflamatórios e Metabólicos, Programa de Pós-Graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina, Tubarão, Santa Catarina, Brasil
| | - Carolini Mendes
- Laboratório de Fisiopatologia Experimental, Programa de Pós-Graduação em Ciências da Saúde, Universidade do Extremo Sul Catarinense, Criciúma, Santa Catarina, Brasil
| | - Maria Eduarda Anastácio Borges Corrêa
- Laboratório de Fisiopatologia Experimental, Programa de Pós-Graduação em Ciências da Saúde, Universidade do Extremo Sul Catarinense, Criciúma, Santa Catarina, Brasil
| | - Maria Luiza Gomes
- Laboratório de Erros Inatos do Metabolismo, Programa de Pós-Graduação em Ciências da Saúde, Universidade do Extremo Sul Catarinense, Criciúma, Santa Catarina, Brasil
| | - Paulo Cesar Lock Silveira
- Laboratório de Fisiopatologia Experimental, Programa de Pós-Graduação em Ciências da Saúde, Universidade do Extremo Sul Catarinense, Criciúma, Santa Catarina, Brasil
| | - Patrícia Fernanda Schuck
- Laboratório de Erros Inatos do Metabolismo, Escola de Ciências, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brasil
| | - Fabricia Petronilho
- Laboratório de Neurobiologia de Processos Inflamatórios e Metabólicos, Programa de Pós-Graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina, Tubarão, Santa Catarina, Brasil
| | - Gislaine Tezza Rezin
- Laboratório de Neurobiologia de Processos Inflamatórios e Metabólicos, Programa de Pós-Graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina, Tubarão, Santa Catarina, Brasil
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3
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Broad AA, Howe GJ, McKie GL, Vanderheyden LW, Hazell TJ. The effects of a pre-exercise meal on postexercise metabolism following a session of sprint interval training. Appl Physiol Nutr Metab 2019; 45:411-420. [PMID: 31553895 DOI: 10.1139/apnm-2019-0510] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Sprint interval training (SIT) has demonstrated reductions in fat mass through potential alterations in postexercise metabolism. This study examined whether exercising in the fasted or fed state affects postexercise metabolism following acute SIT. Ten active males performed a bout of modified SIT (8 × 15-s sprints; 120 s recovery) in both a fasted (FAST) and fed (FED) state. Gas exchange was collected through 3 h postexercise, appetite perceptions were measured using a visual analog scale, and energy intake was recorded using dietary food logs. There was no difference in energy expenditure between conditions at any time point (p > 0.329) or in total session energy expenditure (FED: 514.8 ± 54.9 kcal, FAST: 504.0 ± 74.3 kcal; p = 0.982). Fat oxidation at 3 h after exercise was higher in FED (0.110 ± 0.04 g·min-1) versus FAST (0.069 ± 0.02 g·min-1; p = 0.013) though not different between conditions across time (p > 0.340) or in total postexercise fat oxidation (FED: 0.125 ± 0.04 g·min-1, FAST: 0.105 ± 0.02 g·min-1; p = 0.154). Appetite perceptions were lower in FED (-4815.0 ± 4098.7 mm) versus FAST (-707.5 ± 2010.4 mm, p = 0.022); however, energy intake did not differ between conditions (p = 0.429). These results demonstrate the fasted or fed state does not augment postexercise metabolism following acute SIT in a way that would favour fat loss following training. Novelty Energy expenditure was similar between conditions, while fat oxidation was significantly greater in FED at 3 h after exercise. Appetite perceptions were significantly lower in FED; however, energy intake was not different between conditions. Current findings suggest that performing SIT in the fed or fasted state would not affect fat loss following training.
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Affiliation(s)
- Abigail A Broad
- Department of Kinesiology and Physical Education, Wilfrid Laurier University, Waterloo, ON N2L 3C5, Canada.,Department of Kinesiology and Physical Education, Wilfrid Laurier University, Waterloo, ON N2L 3C5, Canada
| | - Greg J Howe
- Department of Kinesiology and Physical Education, Wilfrid Laurier University, Waterloo, ON N2L 3C5, Canada.,Department of Kinesiology and Physical Education, Wilfrid Laurier University, Waterloo, ON N2L 3C5, Canada
| | - Greg L McKie
- Department of Kinesiology and Physical Education, Wilfrid Laurier University, Waterloo, ON N2L 3C5, Canada.,Department of Kinesiology and Physical Education, Wilfrid Laurier University, Waterloo, ON N2L 3C5, Canada
| | - Luke W Vanderheyden
- Department of Kinesiology and Physical Education, Wilfrid Laurier University, Waterloo, ON N2L 3C5, Canada.,Department of Kinesiology and Physical Education, Wilfrid Laurier University, Waterloo, ON N2L 3C5, Canada
| | - Tom J Hazell
- Department of Kinesiology and Physical Education, Wilfrid Laurier University, Waterloo, ON N2L 3C5, Canada.,Department of Kinesiology and Physical Education, Wilfrid Laurier University, Waterloo, ON N2L 3C5, Canada
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4
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Abstract
Islet transplantation (ITx) is effective in preventing severe hypoglycemia by restoring glucose-dependent insulin secretion in type 1 diabetes (T1D), but may not normalize glucose regulation. Studies suggest that physical activity plays a role in maintaining β-cell mass and function in individuals with type 2 diabetes and animal models of diabetes. This could indicate that physical activity plays a role in graft survival in ITx recipients. This review's objective is to assess current knowledge related to physical activity in ITx recipients. Responses to other challenges in blood glucose control (i.e., hypoglycemia) in human ITx recipients were examined to provide in-depth background information. To identify studies involving exercise in ITx recipients, a systematic search was performed using PubMed, Medline, and Embase, which revealed 277 English language publications. Publications were excluded if they did not involve ITx recipients; did not involve physical activity or hypoglycemia; or did not report on glucose, insulin, or counterregulatory hormones. During induced hypoglycemia, studies indicate normal suppression of insulin in ITx individuals compared with healthy non-T1D controls. Studies involving exercise in ITx animals have conflicting results, with time since transplantation and transplantation site (spleen, liver, kidney, peritoneal cavity) as possible confounders. No study examining blood glucose responses to physical activity in human ITx recipients was identified. A small number of induced-hypoglycemia studies in humans, and exercise studies in animals, would suggest that glucoregulation is greatly improved yet is still imperfect in this population and that ITx does not fully restore counterregulatory responses to challenges in blood glucose homeostasis.
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Affiliation(s)
- Deanna R Funk
- a Augustana Faculty, University of Alberta., 4901 - 46th Avenue Camrose, AB T4V 2R3, Canada
| | - Normand G Boulé
- b Faculty of Physical Education and Recreation, University of Alberta. 1-059D, Li Ka Shing Centre for Health Research Innovation, Edmonton, AB T6G 2E1, Canada
| | - Peter A Senior
- c Faculty of Medicine and Dentistry, Division of Endocrinology, University of Alberta. 2000 College Plaza 8215 112 Street, Edmonton AB T6G 2C8, Canada
| | - Jane E Yardley
- a Augustana Faculty, University of Alberta., 4901 - 46th Avenue Camrose, AB T4V 2R3, Canada
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5
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Prá M, Ferreira GK, de Mello AH, Schraiber RDB, Cardoso LC, Souza LDR, da Rosa N, Fortunato JJ, Rezin GT. Single dose and repeated administrations of liraglutide alter energy metabolism in the brains of young and adult rats. Biochem Cell Biol 2016; 94:451-458. [PMID: 27563837 DOI: 10.1139/bcb-2016-0016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Liraglutide is a human glucagon-like peptide-1 (GLP-1) analogue that was recently approved to treat obesity in some countries. Considering that liraglutide effects on brain energy metabolism are little known, we evaluated the effects of liraglutide on the energy metabolism. Animals received a single or daily injection of saline or liraglutide during 7 days (25, 50, 100, or 300 μg/kg i.p.). Twenty-four hours after the single or last injection, the rats were euthanized and the hypothalamus, prefrontal cortex, cerebellum, hippocampus, striatum, and posterior cortex were isolated. Our results demonstrated that a single dose of liraglutide in young rats increased the activity of complexes and inhibited creatine kinase activity. Repeated administrations of liraglutide in young rats reduced the activity of complexes and activated creatine kinase activity. In adult rats, a single dose of liraglutide reduced the activity of complex I and creatine kinase and increased the activity of complexes II and IV. Repeated administrations of liraglutide in adult rats increased the activity of complexes I and IV and reduced the activity of complex II and creatine kinase. We concluded that liraglutide may interfere in energy metabolism, because analysis of different times of administrations, concentrations, and level of brain development leads to divergent results.
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Affiliation(s)
- Morgana Prá
- a Laboratory of Clinical and Experimental Pathophysiology, Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Tubarão, 88704-900 SC, Brazil
| | - Gabriela Kozuchovski Ferreira
- b Laboratory Pharmacology and Pathophysiology of Skin, Department of Pharmacology, Federal University of Paraná, Curitiba, 81531-980 PR, Brazil
| | - Aline Haas de Mello
- a Laboratory of Clinical and Experimental Pathophysiology, Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Tubarão, 88704-900 SC, Brazil
| | - Rosiane de Bona Schraiber
- a Laboratory of Clinical and Experimental Pathophysiology, Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Tubarão, 88704-900 SC, Brazil
| | - Larissa Colonetti Cardoso
- a Laboratory of Clinical and Experimental Pathophysiology, Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Tubarão, 88704-900 SC, Brazil
| | - Luana da Rosa Souza
- a Laboratory of Clinical and Experimental Pathophysiology, Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Tubarão, 88704-900 SC, Brazil
| | - Naiana da Rosa
- c Laboratory of Neuroscience, Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Tubarão, 88704-900 SC, Brazil
| | - Jucélia Jeremias Fortunato
- c Laboratory of Neuroscience, Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Tubarão, 88704-900 SC, Brazil
| | - Gislaine Tezza Rezin
- a Laboratory of Clinical and Experimental Pathophysiology, Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Tubarão, 88704-900 SC, Brazil
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Zhu W, Cui Y, Feng X, Li Y, Zhang W, Xu J, Wang H, Lv S. The apoptotic effect and the plausible mechanism of microwave radiation on rat myocardial cells. Can J Physiol Pharmacol 2016; 94:849-57. [PMID: 27203380 DOI: 10.1139/cjpp-2015-0537] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Microwaves may exert adverse biological effects on the cardiovascular system at the integrated system and cellular levels. However, the mechanism underlying such effects remains poorly understood. Here, we report a previously uncharacterized mechanism through which microwaves damage myocardial cells. Rats were treated with 2450 MHz microwave radiation at 50, 100, 150, or 200 mW/cm(2) for 6 min. Microwave treatment significantly enhanced the levels of various enzymes in serum. In addition, it increased the malondialdehyde content while decreasing the levels of antioxidative stress enzymes, activities of enzyme complexes I-IV, and ATP in myocardial tissues. Notably, irradiated myocardial cells exhibited structural damage and underwent apoptosis. Furthermore, Western blot analysis revealed significant changes in expression levels of proteins involved in oxidative stress regulation and apoptotic signaling pathways, indicating that microwave irradiation could induce myocardial cell apoptosis by interfering with oxidative stress and cardiac energy metabolism. Our findings provide useful insights into the mechanism of microwave-induced damage to the cardiovascular system.
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Affiliation(s)
- Wenhe Zhu
- a Department of Biochemistry, Ji Lin Medical University, Ji Lin 132013, China
| | - Yan Cui
- b First Hospital of Jilin University, Changchun, Jilin, China
| | - Xianmin Feng
- a Department of Biochemistry, Ji Lin Medical University, Ji Lin 132013, China
| | - Yan Li
- a Department of Biochemistry, Ji Lin Medical University, Ji Lin 132013, China
| | - Wei Zhang
- a Department of Biochemistry, Ji Lin Medical University, Ji Lin 132013, China
| | - Junjie Xu
- a Department of Biochemistry, Ji Lin Medical University, Ji Lin 132013, China
| | - Huiyan Wang
- a Department of Biochemistry, Ji Lin Medical University, Ji Lin 132013, China
| | - Shijie Lv
- a Department of Biochemistry, Ji Lin Medical University, Ji Lin 132013, China
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Zhao Y, Wang X, Li L, Li C. Doxycycline inhibits proliferation and induces apoptosis of both human papillomavirus positive and negative cervical cancer cell lines. Can J Physiol Pharmacol 2016; 94:526-33. [PMID: 26913972 DOI: 10.1139/cjpp-2015-0481] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The clinical management of cervical cancer remains a challenge and the development of new treatment strategies merits attention. However, the discovery and development of novel compounds can be a long and labourious process. Drug repositioning may circumvent this process and facilitate the rapid translation of hypothesis-driven science into the clinics. In this work, we show that a FDA-approved antibiotic, doxycycline, effectively targets human papillomavirus (HPV) positive and negative cervical cancer cells in vitro and in vivo. Doxycycline significantly inhibits proliferation of a panel of cervical cancer cell lines. It also induces apoptosis of cervical cancer cells in a time- and dose-dependent manner. In addition, the apoptosis induced by doxycycline is through caspase-dependent pathway. Mechanism studies demonstrate that doxycycline affects oxygen consumption rate, glycolysis, and reduces ATP levels in cervical cancer cells. In HeLa xenograft mouse model, doxycycline significantly inhibits growth of tumour. Our in vitro and in vivo data clearly demonstrate the inhibitory effects of doxycycline on the growth and survival of cervical cancer cells. Our work provides the evidence that doxycycline can be repurposed for the treatment of cervical cancer and targeting energy metabolism may represent a potential therapeutic strategy for cervical cancer.
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Affiliation(s)
- Yan Zhao
- Shandong Provincial Hospital affiliated to Shandong University, 324 Jingwu Rd., Huaiyin Dist., Jinan 250021, Shandong Province, China
| | - Xinyu Wang
- Shandong Provincial Hospital affiliated to Shandong University, 324 Jingwu Rd., Huaiyin Dist., Jinan 250021, Shandong Province, China
| | - Lei Li
- Shandong Provincial Hospital affiliated to Shandong University, 324 Jingwu Rd., Huaiyin Dist., Jinan 250021, Shandong Province, China.,Shandong Provincial Hospital affiliated to Shandong University, 324 Jingwu Rd., Huaiyin Dist., Jinan 250021, Shandong Province, China
| | - Changzhong Li
- Shandong Provincial Hospital affiliated to Shandong University, 324 Jingwu Rd., Huaiyin Dist., Jinan 250021, Shandong Province, China.,Shandong Provincial Hospital affiliated to Shandong University, 324 Jingwu Rd., Huaiyin Dist., Jinan 250021, Shandong Province, China
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Ipavec-Levasseur S, Croci I, Choquette S, Byrne NM, Cowin G, O'Moore-Sullivan TM, Prins JB, Hickman IJ. Effect of 1-h moderate-intensity aerobic exercise on intramyocellular lipids in obese men before and after a lifestyle intervention. Appl Physiol Nutr Metab 2015; 40:1262-8. [PMID: 26575100 DOI: 10.1139/apnm-2015-0258] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Intramyocellular lipids (IMCL) are depleted in response to an acute bout of exercise in lean endurance-trained individuals; however, it is unclear whether changes in IMCL content are also seen in response to acute and chronic exercise in obese individuals. We used magnetic resonance spectroscopy in 18 obese men and 5 normal-weight controls to assess IMCL content before and after an hour of cycling at the intensity corresponding with each participant's maximal whole-body rate of fat oxidation (Fatmax). Fatmax was determined via indirect calorimetry during a graded exercise test on a cycle ergometer. The same outcome measures were reassessed in the obese group after a 16-week lifestyle intervention comprising dietary calorie restriction and exercise training. At baseline, IMCL content decreased in response to 1 h of cycling at Fatmax in controls (2.8 ± 0.4 to 2.0 ± 0.3 A.U., -39%, p = 0.02), but not in obese (5.4 ± 2.1 vs. 5.2 ± 2.2 A.U., p = 0.42). The lifestyle intervention lead to weight loss (-10.0 ± 5.4 kg, p < 0.001), improvements in maximal aerobic power (+5.2 ± 3.4 mL/(kg·min)), maximal fat oxidation rate (+0.19 ± 0.22 g/min), and a 29% decrease in homeostasis model assessment score (all p < 0.05). However, when the 1 h of cycling at Fatmax was repeated after the lifestyle intervention, there remained no observable change in IMCL (4.6 ± 1.8 vs. 4.6 ± 1.9 A.U., p = 0.92). In summary, there was no IMCL depletion in response to 1 h of cycling at moderate intensity either before or after the lifestyle intervention in obese men. An effective lifestyle intervention including moderate-intensity exercise training did not impact rate of utilisation of IMCL during acute exercise in obese men.
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Affiliation(s)
| | - Ilaria Croci
- a The University of Queensland Diamantina Institute, Brisbane, Australia.,b School of Human Movement and Nutrition Sciences, University of Queensland, Brisbane, Australia.,c Mater Research Institute, University of Queensland, Brisbane, Australia
| | - Stéphane Choquette
- d Faculty of Physical Education and Sports, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Nuala M Byrne
- e Bond Institute of Health and Sport, Bond University, Robina, Australia.,f Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Australia
| | - Gary Cowin
- g Centre for Advanced Imaging, University of Queensland, Brisbane, Australia
| | - Trisha M O'Moore-Sullivan
- c Mater Research Institute, University of Queensland, Brisbane, Australia.,h Department of Diabetes and Endocrinology, Princess Alexandra Hospital, Brisbane, Australia
| | - Johannes B Prins
- c Mater Research Institute, University of Queensland, Brisbane, Australia
| | - Ingrid J Hickman
- a The University of Queensland Diamantina Institute, Brisbane, Australia.,c Mater Research Institute, University of Queensland, Brisbane, Australia
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