1
|
Ramos PM, Wohlgemuth SE, Gingerich CA, Hawryluk B, Smith MT, Bell LC, Scheffler TL. Postmortem mitochondria function in longissimus lumborum of Angus and Brahman steers. Meat Sci 2024; 215:109538. [PMID: 38772311 DOI: 10.1016/j.meatsci.2024.109538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 04/09/2024] [Accepted: 05/09/2024] [Indexed: 05/23/2024]
Abstract
Mitochondria function and integrity may impact postmortem metabolism and meat quality development. Adaptations in heat tolerant Brahman may persist to limit cellular stress postmortem. Our objective was to evaluate glycolysis, pH decline, and mitochondria function in longissimus lumborum (LL) from Angus and Brahman steers (N = 28) early postmortem (1 to 6 h) and after rigor (24 h). We evaluated metabolites of anaerobic glycolysis, ATP, pH, and temperature, and determined mitochondria oxygen consumption rate (OCR) in permeabilized fibers. The main effects of breed (b) and time (t) and the interaction were tested. Brahman LL contained greater ATP during the first 6 h postmortem; Brahman also tended to exhibit a slower pH decline (b × t, P = 0.07) and more rapid temperature decline (b × t, P < 0.001), but metabolites of anaerobic glycolysis were not different. Mitochondria in Brahman and Angus LL were well-coupled and respired at 1 h postmortem. However, outer membrane integrity became increasingly compromised postmortem (t, P < 0.001). Brahman tended to exhibit greater electron transport system capacity (b, P < 0.1) and had greater capacity for oxidative phosphorylation (complex I and II substrates) at 6 h compared with Angus (P < 0.001). In totality, greater ATP, slower pH decline, and enhanced mitochondria capacity indicate that Brahman possess mitochondrial properties or cellular adaptations that help protect the cell during energy stress postmortem. Slower pH and more rapid temperature decline in LL from Brahman may also help preserve mitochondria function postmortem.
Collapse
Affiliation(s)
- Patricia M Ramos
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611, United States of America
| | - Stephanie E Wohlgemuth
- Department of Physiology and Aging, University of Florida, Gainesville, FL 32603, United States of America
| | - Chloe A Gingerich
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611, United States of America
| | - Briana Hawryluk
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611, United States of America
| | - Morgan T Smith
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611, United States of America
| | - Lindsey C Bell
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611, United States of America
| | - Tracy L Scheffler
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611, United States of America.
| |
Collapse
|
2
|
Stavres J, Wang J, Sica CT, Blaha C, Herr M, Pai S, Cauffman A, Vesek J, Yang QX, Sinoway LI. Diffusion tensor imaging indices of acute muscle damage are augmented after exercise in peripheral arterial disease. Eur J Appl Physiol 2021; 121:2595-2606. [PMID: 34106324 PMCID: PMC10445221 DOI: 10.1007/s00421-021-04711-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 05/05/2021] [Indexed: 12/20/2022]
Abstract
PURPOSE Although it is known that peripheral arterial disease (PAD) is associated with chronic myopathies, the acute muscular responses to exercise in this population are less clear. This study used diffusion tensor imaging (DTI) to compare acute exercise-related muscle damage between PAD patients and healthy controls. METHODS Eight PAD patients and seven healthy controls performed graded plantar flexion in the bore of a 3T MRI scanner. Exercise began at 2 kg and increased by 2 kg every 2 min until failure, or completion of 10 min of exercise. DTI images were acquired from the lower leg pre- and post-exercise, and were analyzed for mean diffusivity, fractional anisotropy (FA), and eigenvalues 1-3 (λ1-3) of the medial gastrocnemius (MG) and tibialis anterior (TA). RESULTS Results indicated a significant leg by time interaction for mean diffusivity, explained by a significantly greater increase in diffusivity of the MG in the most affected legs of PAD patients (11.1 × 10-4 ± 0.5 × 10-4 mm2/s vs. 12.7 × 10-4 ± 1.2 × 10-4 mm2/s at pre and post, respectively, P = 0.02) compared to healthy control subjects (10.8 × 10-4 ± 0.3 × 10-4 mm2/s vs. 11.2 × 10-4 ± 0.5 × 10-4 mm2/s at pre and post, respectively, P = 1.0). No significant differences were observed for the TA, or λ1-3 (all P ≥ 0.06). Moreover, no reciprocal changes were observed for FA in either group (all P ≥ 0.29). CONCLUSION These data suggest that calf muscle diffusivity increases more in PAD patients compared to controls after exercise. These findings are consistent with the notion that acute exercise results in increased muscle damage in PAD.
Collapse
Affiliation(s)
- Jon Stavres
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Milton S. Hershey Medical Center, Hershey, PA, USA.
| | - Jianli Wang
- Department of Radiology, Pennsylvania State University College of Medicine, Milton S. Hershey Medical Center, Hershey, PA, USA
| | - Christopher T Sica
- Department of Radiology, Pennsylvania State University College of Medicine, Milton S. Hershey Medical Center, Hershey, PA, USA
| | - Cheryl Blaha
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Milton S. Hershey Medical Center, Hershey, PA, USA
| | - Michael Herr
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Milton S. Hershey Medical Center, Hershey, PA, USA
| | - Samuel Pai
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Milton S. Hershey Medical Center, Hershey, PA, USA
| | - Aimee Cauffman
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Milton S. Hershey Medical Center, Hershey, PA, USA
| | - Jeffrey Vesek
- Department of Molecular Biology, Pennsylvania State University College of Medicine, Milton S. Hershey Medical Center, Hershey, PA, USA
| | - Qing X Yang
- Department of Radiology, Pennsylvania State University College of Medicine, Milton S. Hershey Medical Center, Hershey, PA, USA
- Department of Neurosurgery, Pennsylvania State University College of Medicine, Milton S. Hershey Medical Center, Hershey, PA, USA
| | - Lawrence I Sinoway
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Milton S. Hershey Medical Center, Hershey, PA, USA
| |
Collapse
|
3
|
Hersant J, Ramondou P, Picquet J, Feuilloy M, Abraham P, Henni S. Calf and non-calf hemodynamic recovery in patients with arterial claudication: Implication for exercise training. Microvasc Res 2021; 135:104143. [PMID: 33515566 DOI: 10.1016/j.mvr.2021.104143] [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: 01/04/2021] [Accepted: 01/25/2021] [Indexed: 10/22/2022]
Abstract
BACKGROUND Previous studies in patients with arterial claudication have focused on calf hemodynamic recovery. We hypothesized that the duration of hemodynamic recovery with TcpO2 at calf and non-calf levels would be shorter than 10 min. We analyzed the factors that influence the recovery time. METHODS We monitored limb changes minus chest changes from rest (DROP) of transcutaneous oximetry on buttocks, thighs and calves, during and following a treadmill test (3.2 km/h; 10% grade). We calculated the time required to reach 50% (50%RT) and 10% (90%RT) of minimal DROP value (DROPm) from walking cessation. Regression analyses were used to determine the factors associated to 50%RT and 90%RT. RESULTS Of the 132 patients studied, 18.2% reported isolated non-calf pain by history. Of the 792 recovery time values, only 3 (0.4%) and 23 (2.9%) were in excess of 10 min for 50%RT and for 90%RT, respectively. A weak correlation was found between each of the 792 DROPm and 50%RT (r = -0.270, p < 0.001) as well as for 90%RT (r = -0.311 p < 0.001). Lowest DROPm and BMI (but not age, sex, the use of beta-blockers, the duration of the walking period) were associated to both 50%RT and 90%RT. CONCLUSION Although recovery duration correlates significantly with the severity of ischemia of the same location, a wide discrepancy exists and the longest recovery time does not always correlate to the localization of the most severe ischemia. Non-calf ischemia should be measured when one aims at objectifying the biological effects of exercise or the effects of treatments on recovery from exercise.
Collapse
Affiliation(s)
| | | | - Jean Picquet
- MitoVasc Institute UMR CNRS 6015/INSERM 1083, Faculty of Medicine, Angers University, France; Thoracic and Vascular Surgery, University Hospital, Angers, France
| | | | - Pierre Abraham
- MitoVasc Institute UMR CNRS 6015/INSERM 1083, Faculty of Medicine, Angers University, France; Sports Medicine, University Hospital Center, Angers, France.
| | - Samir Henni
- Vascular Medicine, University Hospital, Angers, France; MitoVasc Institute UMR CNRS 6015/INSERM 1083, Faculty of Medicine, Angers University, France
| |
Collapse
|
4
|
The hidden side of calf claudication: Hemodynamic and clinical results of treadmill testing in 584 patients complaining of isolated exertional calf pain. Atherosclerosis 2020; 314:41-47. [DOI: 10.1016/j.atherosclerosis.2020.10.891] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 10/07/2020] [Accepted: 10/28/2020] [Indexed: 12/25/2022]
|
5
|
Groennebaek T, Billeskov TB, Schytz CT, Jespersen NR, Bøtker HE, Olsen RKJ, Eldrup N, Nielsen J, Farup J, de Paoli FV, Vissing K. Mitochondrial Structure and Function in the Metabolic Myopathy Accompanying Patients with Critical Limb Ischemia. Cells 2020; 9:cells9030570. [PMID: 32121096 PMCID: PMC7140415 DOI: 10.3390/cells9030570] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 02/20/2020] [Accepted: 02/26/2020] [Indexed: 12/12/2022] Open
Abstract
Mitochondrial dysfunction has been implicated as a central mechanism in the metabolic myopathy accompanying critical limb ischemia (CLI). However, whether mitochondrial dysfunction is directly related to lower extremity ischemia and the structural and molecular mechanisms underpinning mitochondrial dysfunction in CLI patients is not understood. Here, we aimed to study whether mitochondrial dysfunction is a distinctive characteristic of CLI myopathy by assessing mitochondrial respiration in gastrocnemius muscle from 14 CLI patients (65.3 ± 7.8 y) and 15 matched control patients (CON) with a similar comorbidity risk profile and medication regimen but without peripheral ischemia (67.4 ± 7.4 y). Furthermore, we studied potential structural and molecular mechanisms of mitochondrial dysfunction by measuring total, sub-population, and fiber-type-specific mitochondrial volumetric content and cristae density with transmission electron microscopy and by assessing mitophagy and fission/fusion-related protein expression. Finally, we asked whether commonly used biomarkers of mitochondrial content are valid in patients with cardiovascular disease. CLI patients exhibited inferior mitochondrial respiration compared to CON. This respiratory deficit was not related to lower whole-muscle mitochondrial content or cristae density. However, stratification for fiber types revealed ultrastructural mitochondrial alterations in CLI patients compared to CON. CLI patients exhibited an altered expression of mitophagy-related proteins but not fission/fusion-related proteins compared to CON. Citrate synthase, cytochrome c oxidase subunit IV (COXIV), and 3-hydroxyacyl-CoA dehydrogenase (β-HAD) could not predict mitochondrial content. Mitochondrial dysfunction is a distinctive characteristic of CLI myopathy and is not related to altered organelle content or cristae density. Our results link this intrinsic mitochondrial deficit to dysregulation of the mitochondrial quality control system, which has implications for the development of therapeutic strategies.
Collapse
Affiliation(s)
- Thomas Groennebaek
- Department of Public Health, Aarhus University, 8000 Aarhus, Denmark; (T.G.); (C.T.S.)
| | - Tine Borum Billeskov
- Department of Biomedicine, Aarhus University, 8000 Aarhus, Denmark; (T.B.B.); (J.F.)
- Department of Cardiothoracic and Vascular Surgery, Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Camilla Tvede Schytz
- Department of Public Health, Aarhus University, 8000 Aarhus, Denmark; (T.G.); (C.T.S.)
- Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, 5230 Odense, Denmark;
| | - Nichlas Riise Jespersen
- Department of Cardiology, Aarhus University Hospital, 8200 Aarhus, Denmark; (N.R.J.); (H.E.B.)
| | - Hans Erik Bøtker
- Department of Cardiology, Aarhus University Hospital, 8200 Aarhus, Denmark; (N.R.J.); (H.E.B.)
| | | | - Nikolaj Eldrup
- Department Vascular Surgery, Rigshospitalet, Copenhagen University, 2100 Copenhagen, Denmark;
| | - Joachim Nielsen
- Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, 5230 Odense, Denmark;
| | - Jean Farup
- Department of Biomedicine, Aarhus University, 8000 Aarhus, Denmark; (T.B.B.); (J.F.)
| | - Frank Vincenzo de Paoli
- Department of Biomedicine, Aarhus University, 8000 Aarhus, Denmark; (T.B.B.); (J.F.)
- Department of Cardiothoracic and Vascular Surgery, Aarhus University Hospital, 8200 Aarhus, Denmark
- Correspondence: (F.V.d.P.); (K.V.); Tel.: +45-87168173
| | - Kristian Vissing
- Department of Public Health, Aarhus University, 8000 Aarhus, Denmark; (T.G.); (C.T.S.)
- Correspondence: (F.V.d.P.); (K.V.); Tel.: +45-87168173
| |
Collapse
|