1
|
Duan Z, Wang J, Zhang H, Wang Y, Chen Y, Cong J, Gong Z, Sun H, Wang L. Elevated temperature decreases cardiovascular toxicity of nanoplastics but adds to their lethality: A case study during zebrafish (Danio rerio) development. JOURNAL OF HAZARDOUS MATERIALS 2023; 458:131679. [PMID: 37421853 DOI: 10.1016/j.jhazmat.2023.131679] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 05/13/2023] [Accepted: 05/21/2023] [Indexed: 07/10/2023]
Abstract
To highlight the key role of global warming on the toxicity of contaminants, the cardiovascular toxicity of nanoparticles (NPs) was estimated in developing zebrafish (Danio rerio) at different exposure temperatures, and the toxicity mechanisms were explored via multi-omic analyses. Polystyrene NPs (50 nm) at 0.1 mg·L-1 entered zebrafish embryos at 24 h post-fertilization and caused cardiovascular toxicity in the developing zebrafish at 27 ℃. This was explained by the down-regulation of the branched-chain amino acid and insulin signaling pathways owing to induced oxidative stress. Elevated exposure temperatures promoted the accumulation of NPs in developing zebrafish, increased the levels of oxidative stress and enhanced the oxidative phosphorylation rate in mitochondria, thus resulting in an additive effect on the mortality of zebrafish larvae. Notably, elevated exposure temperatures reduced the cardiovascular toxicity of NPs, as the effective concentration of NPs for inhibiting embryonic heartbeat rate increased from 0.1 mg·L-1 at 27 ℃ to 1.0 mg·L-1 at 30 ℃. Experiments of transgenic zebrafish Tg(myl7:GFP) and multi-omic analyses revealed that elevated temperatures enhanced the myocardial contractility of larvae, thus reducing the cardiovascular toxicity of NPs. However, the health risks of enhanced myocardial contraction caused by NP exposure at elevated temperatures requires further consideration.
Collapse
Affiliation(s)
- Zhenghua Duan
- School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China; College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Jing Wang
- School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Haihong Zhang
- School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Yudi Wang
- School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Yizhuo Chen
- School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Jiaoyue Cong
- School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Zhiyuan Gong
- Department of Biological Sciences, National University of Singapore, Singapore 117543, Singapore
| | - Hongwen Sun
- School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China; Department of Biological Sciences, National University of Singapore, Singapore 117543, Singapore; College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Lei Wang
- College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
| |
Collapse
|
2
|
Goulding RP, Burnley M, Wüst RCI. How Priming Exercise Affects Oxygen Uptake Kinetics: From Underpinning Mechanisms to Endurance Performance. Sports Med 2023; 53:959-976. [PMID: 37010782 PMCID: PMC10115720 DOI: 10.1007/s40279-023-01832-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/27/2023] [Indexed: 04/04/2023]
Abstract
The observation that prior heavy or severe-intensity exercise speeds overall oxygen uptake ([Formula: see text]O2) kinetics, termed the "priming effect", has garnered significant research attention and its underpinning mechanisms have been hotly debated. In the first part of this review, the evidence for and against (1) lactic acidosis, (2) increased muscle temperature, (3) O2 delivery, (4) altered motor unit recruitment patterns and (5) enhanced intracellular O2 utilisation in underpinning the priming effect is discussed. Lactic acidosis and increased muscle temperature are most likely not key determinants of the priming effect. Whilst priming increases muscle O2 delivery, many studies have demonstrated that an increased muscle O2 delivery is not a prerequisite for the priming effect. Motor unit recruitment patterns are altered by prior exercise, and these alterations are consistent with some of the observed changes in [Formula: see text]O2 kinetics in humans. Enhancements in intracellular O2 utilisation likely play a central role in mediating the priming effect, probably related to elevated mitochondrial calcium levels and parallel activation of mitochondrial enzymes at the onset of the second bout. In the latter portion of the review, the implications of priming on the parameters of the power-duration relationship are discussed. The effect of priming on subsequent endurance performance depends critically upon which phases of the [Formula: see text]O2 response are altered. A reduced [Formula: see text]O2 slow component or increased fundamental phase amplitude tend to increase the work performable above critical power (i.e. W´), whereas a reduction in the fundamental phase time constant following priming results in an increased critical power.
Collapse
Affiliation(s)
- Richie P Goulding
- Laboratory for Myology, Faculty of Behavioural and Movement Sciences, Amsterdam Movement Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands.
| | - Mark Burnley
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
| | - Rob C I Wüst
- Laboratory for Myology, Faculty of Behavioural and Movement Sciences, Amsterdam Movement Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands
| |
Collapse
|
3
|
Rocha J, Gildea N, O’Shea D, Green S, Egaña M. Priming exercise accelerates oxygen uptake kinetics during high-intensity cycle exercise in middle-aged individuals with type 2 diabetes. Front Physiol 2022; 13:1006993. [PMID: 36505082 PMCID: PMC9727537 DOI: 10.3389/fphys.2022.1006993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 10/31/2022] [Indexed: 11/19/2022] Open
Abstract
Background: The primary phase time constant of pulmonary oxygen uptake kinetics (V · O 2 τ p) during submaximal efforts is longer in middle-aged people with type 2 diabetes (T2D), partly due to limitations in oxygen supply to active muscles. This study examined if a high-intensity "priming" exercise (PE) would speedV · O 2 τ p during a subsequent high-intensity cycling exercise in T2D due to enhanced oxygen delivery. Methods: Eleven (4 women) middle-aged individuals with type 2 diabetes and 11 (4 women) non-diabetic controls completed four separate cycling bouts each starting at an 'unloaded' baseline of 10 W and transitioning to a high-intensity constant-load. Two of the four cycling bouts were preceded by priming exercise. The dynamics of pulmonaryV · O 2 and muscle deoxygenation (i.e. deoxygenated haemoglobin and myoglobin concentration [HHb + Mb]), were calculated from breath-by-breath and near-infrared spectroscopy data at the vastus lateralis, respectively. Results: At baselineV · O 2 τ p, was slower (p < 0.001) in the type 2 diabetes group (48 ± 6 s) compared to the control group (34 ± 2 s) but priming exercise significantly reducedV · O 2 τ p (p < 0.001) in type 2 diabetes (32 ± 6 s) so that post priming exercise it was not different compared with controls (34 ± 3 s). Priming exercise reduced the amplitude of theV · O 2 slow component (As) in both groups (type 2 diabetes: 0.26 ± 0.11 to 0.16 ± 0.07 L/min; control: 0.33 ± 0.13 to 0.25 ± 0.14 L/min, p < 0.001), while [HHb + Mb] kinetics remained unchanged. Conclusion: These results suggest that in middle-aged men and women with T2D, PE speedsV · O 2 τ p likely by a better matching of O2 delivery to utilisation and reduces theV · O 2 As during a subsequent high-intensity exercise.
Collapse
Affiliation(s)
- Joel Rocha
- Division of Sport and Exercise Sciences, Abertay University, Dundee, United Kingdom
| | - Norita Gildea
- Department of Physiology, School of Medicine, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | - Donal O’Shea
- Endocrinology, St Columcille’s and St Vincent’s Hospitals, Dublin, Ireland
| | - Simon Green
- School of Science and Health, Western Sydney University, Sydney, AU-NSW, Australia
| | - Mikel Egaña
- Department of Physiology, School of Medicine, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| |
Collapse
|
4
|
Stienen GJM. Early adjustments in mitochondrial structure and function in skeletal muscle to high altitude: design and rationale of the first study from the Kilimanjaro Biobank. Biophys Rev 2020; 12:793-798. [PMID: 32572680 DOI: 10.1007/s12551-020-00710-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 06/16/2020] [Indexed: 12/21/2022] Open
Abstract
The physiological acclimatisation and adaptation processes in skeletal muscle at high altitude are of high medical and social relevance not only to understand limitations in physical performance at high altitude but also to understand the consequences of hypoxemia and tissue hypoxia in critically ill patients. Of particular importance in these processes are the alterations in content and function of mitochondria and myoglobin. The majority of studies on oxygen delivery to the tissues and utilisation by the cellular metabolism at high altitude were performed after prolonged stay at high altitude and in altitude-adapted highlanders. However, these studies do not provide insight in the sequence of events during the physiological acclimatisation and adaptation processes. Therefore, it is important to identify the early alterations in structure and function of the major determinants of the oxygen transport via myoglobin and oxygen utilisation by the mitochondria in skeletal muscle at high altitude. To achieve this goal, it is of interest to collect, analyse and compare quadriceps muscle biopsies and venous blood samples of climbers, guides and porters before and after climbing Mount Kilimanjaro and in participants of the Kilimanjaro Marathon before and after the run. The samples will be carefully documented and stored in the Kilimanjaro Biobank and will be made available to other research groups.
Collapse
Affiliation(s)
- G J M Stienen
- Department of Physiology, Kilimanjaro Christian Medical University College, PO Box 2240, Moshi, Tanzania. .,Department of Physiology, Amsterdam UMC, Amsterdam Cardiovascular Sciences, Vrije Universiteit, Amsterdam, the Netherlands.
| |
Collapse
|
5
|
Miranda‐Silva D, Wüst RCI, Conceição G, Gonçalves‐Rodrigues P, Gonçalves N, Gonçalves A, Kuster DWD, Leite‐Moreira AF, Velden J, Sousa Beleza JM, Magalhães J, Stienen GJM, Falcão‐Pires I. Disturbed cardiac mitochondrial and cytosolic calcium handling in a metabolic risk-related rat model of heart failure with preserved ejection fraction. Acta Physiol (Oxf) 2020; 228:e13378. [PMID: 31520455 PMCID: PMC7064935 DOI: 10.1111/apha.13378] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 09/06/2019] [Accepted: 09/06/2019] [Indexed: 12/13/2022]
Abstract
AIM Calcium ions play a pivotal role in matching energy supply and demand in cardiac muscle. Mitochondrial calcium concentration is lower in animal models of heart failure with reduced ejection fraction (HFrEF), but limited information is available about mitochondrial calcium handling in heart failure with preserved ejection fraction (HFpEF). METHODS We assessed mitochondrial Ca2+ handling in intact cardiomyocytes from Zucker/fatty Spontaneously hypertensive F1 hybrid (ZSF1)-lean (control) and ZSF1-obese rats, a metabolic risk-related model of HFpEF. A mitochondrially targeted Ca2+ indicator (MitoCam) was expressed in cultured adult rat cardiomyocytes. Cytosolic and mitochondrial Ca2+ transients were measured at different stimulation frequencies. Mitochondrial respiration and swelling, and expression of key proteins were determined ex vivo. RESULTS At rest, mitochondrial Ca2+ concentration in ZSF1-obese was larger than in ZSF1-lean. The diastolic and systolic mitochondrial Ca2+ concentrations increased with stimulation frequency, but the steady-state levels were larger in ZSF1-obese. The half-widths of the contractile responses, the resting cytosolic Ca2+ concentration and the decay half-times of the cytosolic Ca2+ transients were higher in ZSF1-obese, likely because of a lower SERCA2a/phospholamban ratio. Mitochondrial respiration was lower, particularly with nicotinamide adenine dinucleotide (NADH) (complex I) substrates, and mitochondrial swelling was larger in ZSF1-obese. CONCLUSION The free mitochondrial calcium concentration is higher in HFpEF owing to alterations in mitochondrial and cytosolic Ca2+ handling. This coupling between cytosolic and mitochondrial Ca2+ levels may compensate for myocardial ATP supply in vivo under conditions of mild mitochondrial dysfunction. However, if mitochondrial Ca2+ concentration is sustainedly increased, it might trigger mitochondrial permeability transition pore opening.
Collapse
Affiliation(s)
- Daniela Miranda‐Silva
- Department of Surgery and Physiology Cardiovascular R & D center Faculty of Medicine of the University of Porto Porto Portugal
| | - Rob C. I. Wüst
- Department of Physiology Amsterdam UMC VUmc Amsterdam Cardiovascular Sciences Amsterdam the Netherlands
- Department of Human Movement Sciences Laboratory for Myology Faculty of Behavioural and Movement Sciences Amsterdam Movement Sciences Vrije Universiteit Amsterdam Amsterdam the Netherlands
| | - Glória Conceição
- Department of Surgery and Physiology Cardiovascular R & D center Faculty of Medicine of the University of Porto Porto Portugal
| | - Patrícia Gonçalves‐Rodrigues
- Department of Surgery and Physiology Cardiovascular R & D center Faculty of Medicine of the University of Porto Porto Portugal
| | - Nádia Gonçalves
- Department of Surgery and Physiology Cardiovascular R & D center Faculty of Medicine of the University of Porto Porto Portugal
| | - Alexandre Gonçalves
- Department of Surgery and Physiology Cardiovascular R & D center Faculty of Medicine of the University of Porto Porto Portugal
| | - Diederik W. D. Kuster
- Department of Physiology Amsterdam UMC VUmc Amsterdam Cardiovascular Sciences Amsterdam the Netherlands
| | - Adelino F. Leite‐Moreira
- Department of Surgery and Physiology Cardiovascular R & D center Faculty of Medicine of the University of Porto Porto Portugal
| | - Jolanda Velden
- Department of Physiology Amsterdam UMC VUmc Amsterdam Cardiovascular Sciences Amsterdam the Netherlands
- Netherlands Heart Institute Utrecht the Netherlands
| | - Jorge M. Sousa Beleza
- LaMetEx—Laboratory of Metabolism and Exercise Faculty of Sport Cardiovascular Research Center - UniC, University of Porto Porto Portugal
| | - José Magalhães
- LaMetEx—Laboratory of Metabolism and Exercise Faculty of Sport Cardiovascular Research Center - UniC, University of Porto Porto Portugal
| | - Ger J. M. Stienen
- Department of Physiology Amsterdam UMC VUmc Amsterdam Cardiovascular Sciences Amsterdam the Netherlands
| | - Inês Falcão‐Pires
- Department of Surgery and Physiology Cardiovascular R & D center Faculty of Medicine of the University of Porto Porto Portugal
| |
Collapse
|
6
|
Makrecka‐Kuka M, Liepinsh E, Murray AJ, Lemieux H, Dambrova M, Tepp K, Puurand M, Käämbre T, Han WH, Goede P, O'Brien KA, Turan B, Tuncay E, Olgar Y, Rolo AP, Palmeira CM, Boardman NT, Wüst RCI, Larsen TS. Altered mitochondrial metabolism in the insulin-resistant heart. Acta Physiol (Oxf) 2020; 228:e13430. [PMID: 31840389 DOI: 10.1111/apha.13430] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 12/05/2019] [Accepted: 12/06/2019] [Indexed: 12/12/2022]
Abstract
Obesity-induced insulin resistance and type 2 diabetes mellitus can ultimately result in various complications, including diabetic cardiomyopathy. In this case, cardiac dysfunction is characterized by metabolic disturbances such as impaired glucose oxidation and an increased reliance on fatty acid (FA) oxidation. Mitochondrial dysfunction has often been associated with the altered metabolic function in the diabetic heart, and may result from FA-induced lipotoxicity and uncoupling of oxidative phosphorylation. In this review, we address the metabolic changes in the diabetic heart, focusing on the loss of metabolic flexibility and cardiac mitochondrial function. We consider the alterations observed in mitochondrial substrate utilization, bioenergetics and dynamics, and highlight new areas of research which may improve our understanding of the cause and effect of cardiac mitochondrial dysfunction in diabetes. Finally, we explore how lifestyle (nutrition and exercise) and pharmacological interventions can prevent and treat metabolic and mitochondrial dysfunction in diabetes.
Collapse
Affiliation(s)
| | | | - Andrew J. Murray
- Department of Physiology, Development and Neuroscience University of Cambridge Cambridge UK
| | - Hélène Lemieux
- Department of Medicine Faculty Saint‐Jean, Women and Children's Health Research Institute University of Alberta Edmonton AB Canada
| | | | - Kersti Tepp
- National Institute of Chemical Physics and Biophysics Tallinn Estonia
| | - Marju Puurand
- National Institute of Chemical Physics and Biophysics Tallinn Estonia
| | - Tuuli Käämbre
- National Institute of Chemical Physics and Biophysics Tallinn Estonia
| | - Woo H. Han
- Faculty Saint‐Jean University of Alberta Edmonton AB Canada
| | - Paul Goede
- Laboratory of Endocrinology Amsterdam Gastroenterology & Metabolism Amsterdam University Medical Center University of Amsterdam Amsterdam The Netherlands
| | - Katie A. O'Brien
- Department of Physiology, Development and Neuroscience University of Cambridge Cambridge UK
| | - Belma Turan
- Laboratory of Endocrinology Amsterdam Gastroenterology & Metabolism Amsterdam University Medical Center University of Amsterdam Amsterdam The Netherlands
| | - Erkan Tuncay
- Department of Biophysics Faculty of Medicine Ankara University Ankara Turkey
| | - Yusuf Olgar
- Department of Biophysics Faculty of Medicine Ankara University Ankara Turkey
| | - Anabela P. Rolo
- Department of Life Sciences University of Coimbra and Center for Neurosciences and Cell Biology University of Coimbra Coimbra Portugal
| | - Carlos M. Palmeira
- Department of Life Sciences University of Coimbra and Center for Neurosciences and Cell Biology University of Coimbra Coimbra Portugal
| | - Neoma T. Boardman
- Cardiovascular Research Group Department of Medical Biology UiT the Arctic University of Norway Tromso Norway
| | - Rob C. I. Wüst
- Laboratory for Myology Department of Human Movement Sciences Faculty of Behavioural and Movement Sciences Amsterdam Movement Sciences Vrije Universiteit Amsterdam Amsterdam The Netherlands
| | - Terje S. Larsen
- Cardiovascular Research Group Department of Medical Biology UiT the Arctic University of Norway Tromso Norway
| |
Collapse
|