1
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Ramos PM, Scheffler TL, Beline M, Bodmer J, Gerrard DE, Silva SL. Challenges and opportunities of using Bos indicus cattle to meet consumers' demand for quality beef. Meat Sci 2024; 207:109375. [PMID: 37924645 DOI: 10.1016/j.meatsci.2023.109375] [Citation(s) in RCA: 0] [Impact Index Per Article: 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] [Received: 06/01/2023] [Revised: 10/25/2023] [Accepted: 10/27/2023] [Indexed: 11/06/2023]
Abstract
Beef consumption is expected to increase worldwide, which necessitates the use of Bos indicus cattle that are well-adapted to harsher climates, like the tropics. Yet, beef from these cattle is considered inferior to that of Bos taurus breeds, primarily due to lowered tenderness values and reduced intramuscular fat content. However, the benefits of using Bos indicus genetics are numerous and undeniable. Herein, we explore how decreases in meat quality in these cattle may be offset by increases in livability. Further, we review the knowledge surrounding beef tenderness and explore the processes occurring during the early events of the transformation of muscle to meat that are different in this biological type and may be altered by stress. Growth rate, calpastatin activity and mitochondrial function will be discussed as they relate to tenderness. The opportunities of using Bos indicus cattle are of great interest to the beef industry worldwide, especially given the pressures for enhancing the overall sustainability and carbon footprint of this sector. Delivering a consistently high-quality product for consumers by exploiting Bos indicus genetics in a more sustainable manner will be proposed. Information on novel factors that influence the conversion of muscle to meat is explored to provide insights into opportunities for maximizing beef tenderization and maturation across all cattle. Exploring the use of Bos indicus cattle in modern production schemes, while addressing the mechanisms undergirding meat tenderness should provide the industry with a path forward for building greater demand through producing higher quality beef.
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Affiliation(s)
- Patricia M Ramos
- Animal Science Department, College of Animal Science and Food Engineering, University of Sao Paulo, Pirassununga, SP, Brazil
| | - Tracy L Scheffler
- Animal Science Department, University of Florida, Gainesville, FL, USA
| | - Mariane Beline
- School of Animal Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Jocelyn Bodmer
- School of Animal Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - David E Gerrard
- School of Animal Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Saulo Luz Silva
- Animal Science Department, College of Animal Science and Food Engineering, University of Sao Paulo, Pirassununga, SP, Brazil.
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2
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Miola AC, Ramos PM, Mazeto IFS, Brommonschenkel CC, Miot HA. On the characterization of the effluvium following COVID-19 infection. J Eur Acad Dermatol Venereol 2023; 37:e1100-e1101. [PMID: 37147898 DOI: 10.1111/jdv.19166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Accepted: 04/26/2023] [Indexed: 05/07/2023]
Affiliation(s)
- A C Miola
- Departamento de Infectologia, Dermatologia, Diagnóstico por Imagem e Radioterapia, UNESP, Botucatu, SP, Brazil
| | - P M Ramos
- Departamento de Infectologia, Dermatologia, Diagnóstico por Imagem e Radioterapia, UNESP, Botucatu, SP, Brazil
| | - I F S Mazeto
- Departamento de Infectologia, Dermatologia, Diagnóstico por Imagem e Radioterapia, UNESP, Botucatu, SP, Brazil
| | - C C Brommonschenkel
- Departamento de Infectologia, Dermatologia, Diagnóstico por Imagem e Radioterapia, UNESP, Botucatu, SP, Brazil
| | - H A Miot
- Departamento de Infectologia, Dermatologia, Diagnóstico por Imagem e Radioterapia, UNESP, Botucatu, SP, Brazil
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3
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Horrillo AS, Villanueva LS, Cárdenas AC, Ramos PM, Ortiz A, Quiroga B. Infectious consequences of the AKI-to-CKD transition. Clin Kidney J 2022; 15:2237-2244. [DOI: 10.1093/ckj/sfac178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Acute kidney injury (AKI) is associated with short- and long-term complications but the consequences of the AKI-to-CKD transition are still poorly understood. We aimed to evaluate the association between the AKI-to-CKD transition and the long-term risk of infection.
Methods
This retrospective study included patients admitted in a tertiary hospital with community-acquired AKI in 2013 and 2014 that had estimated glomerular filtration rate (eGFR) assessed at 3 months (±2 weeks) after serum creatinine peaked in the AKI episode. Key exclusion criteria were baseline CKD or confounding factors (active neoplasia, primary immunodeficiency, HIV, immunosuppressive drugs). The association between the AKI-to-CKD transition (defined as having eGFR < 60 ml/min/1.73 m2 at 3 months) and long-term infections (defined using clinical features, blood/urine analysis, cultures and image) was assessed during a follow-up of 9 (2–56) months.
Results
Among the 1731 patients admitted with AKI, 367 (21%) were included in the present analysis (64% male, 71 ± 15 years). Three months after AKI, 159 (43%) developed AKI-to-CKD transition. Baseline and post-AKI eGFR were independent predictors of AKI-to-CKD transition (HR 0.97, p = 0.044 and HR 0.96, p < 0.001, respectively).
During follow-up, 153 (42%) patients developed an infection. Factors associated to infection were older age, cognitive impairment, lower post-AKI eGFR, eGFR loss from baseline to 3 months and AKI-to-CKD transition. Adjusted Cox regression showed that baseline eGFR, 3-month eGFR, eGFR loss and AKI-to-CKD transition were independent predictors of the long-term risk of infection.
Conclusions
The AKI-to-CKD transition independently predicts the long-term risk of infection following an episode of AKI.
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Affiliation(s)
- Ana S Horrillo
- IIS-La Princesa. Nephrology Department, Hospital Universitario de La Princesa , Madrid , Spain
| | - Laura S Villanueva
- IIS-La Princesa. Nephrology Department, Hospital Universitario de La Princesa , Madrid , Spain
| | - Alicia C Cárdenas
- IIS-La Princesa. Nephrology Department, Hospital Universitario de La Princesa , Madrid , Spain
| | - Patricia M Ramos
- IIS-La Princesa. Nephrology Department, Hospital Universitario de La Princesa , Madrid , Spain
| | - Alberto Ortiz
- IIS-Fundación Jimenez Diaz, School of Medicine, Universidad Autónoma de Madrid, Fundación Renal Iñigo Alvarez de Toledo-IRSIN, REDinREN, Instituto de Investigación Carlos III , Madrid , Spain
| | - Borja Quiroga
- IIS-La Princesa. Nephrology Department, Hospital Universitario de La Princesa , Madrid , Spain
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de Marsillac PF, Cortez de Almeida RF, Machado CJ, Piraccini BM, Starace M, Tosti A, Vincenzi C, Kobzei K, Iorizzo M, Alves LD, Blanco A, Coelho C, Saceda-Corralo D, D'Atri G, Benez M, Ramos PM, Baja S, Tortelly VD, Frattini S, Melo DF. Clinical, epidemiological, trichoscopic and histopathological features of linear morphea on the scalp. J Eur Acad Dermatol Venereol 2022; 36:e892-e895. [PMID: 35694874 DOI: 10.1111/jdv.18323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 06/03/2022] [Indexed: 11/29/2022]
Affiliation(s)
- P F de Marsillac
- Department of Dermatology, State University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - R F Cortez de Almeida
- Department of Dermatology, State University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - C J Machado
- Preventive and Social Medicine Department, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - B M Piraccini
- Dermatology - IRCCS Policlinico di Sant'Orsola - Department of Experimental, Diagnostic and Specialty Medicine, Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | - M Starace
- Dermatology - IRCCS Policlinico di Sant'Orsola - Department of Experimental, Diagnostic and Specialty Medicine, Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | - A Tosti
- Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami School of Medicine, Miami, Florida, USA
| | - C Vincenzi
- Department of Dermatology, Private Hospital Nigrisoli, Bologna, Italy
| | - K Kobzei
- Kyiv Medical University, Kyiv, Ukraine
| | - M Iorizzo
- Private Dermatology Practice, Bellinzona, Lugano, Switzerland
| | - L D Alves
- Department of Tropical Medicine and Dermatology, Federal University of Goiás, Goiânia, GO, Brazil
| | - A Blanco
- Department of Dermatology, Federal University of Mato Grosso do Sul, Campo Grande, MS, Brazil
| | - C Coelho
- Department of Dermatology, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - D Saceda-Corralo
- Dermatology Department, Trichology Unit, Ramón y Cajal University Hospital, Instituto Ramón y Cajal de Investigación Sanitaria, University of Alcalá, Madrid, Spain
| | - G D'Atri
- GrupoMCI (Integral Hair Medicine), Private Dermatology Practice, Buenos Aires, Argentina
| | - M Benez
- Department of Dermatology, State University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - P M Ramos
- Department of Dermatology and Radiotherapy, São Paulo State University, Botucatu, SP, Brazil
| | - S Baja
- Private Dermatology Practice, Resende, RJ, Brazil
| | - V D Tortelly
- Department of Dermatology, State University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - S Frattini
- Mental Health Department, Guelph General Hospital, Guelph, Ontario, Canada
| | - D F Melo
- Department of Dermatology, State University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
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Criado PR, Ianhez M, Silva de Castro CC, Talhari C, Ramos PM, Miot HA. COVID-19 and skin diseases: results from a survey of 843 patients with atopic dermatitis, psoriasis, vitiligo and chronic urticaria. J Eur Acad Dermatol Venereol 2021; 36:e1-e3. [PMID: 34487381 DOI: 10.1111/jdv.17635] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 09/02/2021] [Indexed: 12/29/2022]
Affiliation(s)
- P R Criado
- Centro Universitário Faculdade de Medicina do ABC and Alergoskin Alergia e Dermatologia, Santo André, Brazil
| | - M Ianhez
- Departamento de Medicina Tropical e Dermatologia da, Universidade Federal de Goiás (UFG), Goiânia, Brazil
| | - C C Silva de Castro
- School of Medicine, Pontifícia Universidade Católica do Paraná, Curitiba, Brazil
| | - C Talhari
- Universidade do Estado do Amazonas, Manaus, Brazil
| | - P M Ramos
- UNESP Medical School, Botucatu, Brazil
| | - H A Miot
- UNESP Medical School, Botucatu, Brazil
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6
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Ramos PM, Melo DF, Lemes LR, Alcantara G, Miot HA, Lyra MR, Vargas TJDS. Folliculitis decalvans and lichen planopilaris phenotypic spectrum: case report of two paediatric cases. J Eur Acad Dermatol Venereol 2021; 35:e674-e676. [PMID: 34014598 DOI: 10.1111/jdv.17379] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 03/26/2021] [Accepted: 04/28/2021] [Indexed: 01/05/2023]
Affiliation(s)
- P M Ramos
- Department of Dermatology and Radiotherapy, São Paulo State University (UNESP), Botucatu, Brazil
| | - D F Melo
- Department of Dermatology, University of State of Rio de Janeiro - UERJ, Brazil
| | - L R Lemes
- Department of Dermatology, University of State of Rio de Janeiro - UERJ, Brazil
| | - G Alcantara
- Department of Dermatology and Radiotherapy, São Paulo State University (UNESP), Botucatu, Brazil
| | - H A Miot
- Department of Dermatology and Radiotherapy, São Paulo State University (UNESP), Botucatu, Brazil
| | - M R Lyra
- Oswaldo Cruz Foundation - Infectious Disease in Dermatology, Rio de Janeiro, Brazil
| | - T J de S Vargas
- Department of Dermatology, Federal Hospital of Bonsucesso, Rio de Janeiro, Brazil
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Ramos PM, Bell LC, Wohlgemuth SE, Scheffler TL. Mitochondrial Function in Oxidative and Glycolytic Bovine Skeletal Muscle Postmortem. Meat and Muscle Biology 2021. [DOI: 10.22175/mmb.11698] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Meat quality is traditionally associated with anaerobic metabolism due to cessation of the oxygen supply post-mortem. However, mitochondrial (mt) function early postmortem may affect the development of meat quality characteristics, such as adenosine triphosphate levels and pH decline. Therefore, the objective of this study was to evaluate mt function ex vivo during the first 24 h postmortem in muscles with differences in mt content. Samples from longissimus lumborum (LL) and diaphragm (Dia) were taken from steers (n = 6) at 1, 3, and 24 h postmortem and frozen to determine citrate synthase (CS) activity and mt protein expression (immunodetection) or were fresh-preserved for high-resolution respirometry. Integrative oxygen consumption rate (picomoles per second per milligram of tissue) was measured and normalized to CS activity as a proxy for mt content (intrinsic mt function, picomoles per second per unit CS). CS activity (P < 0.001) and mt protein expression (P < 0.001) were greater in Dia, which was reflected in mt respiration. Muscle type affected (P < 0.001) integrative leak respiration and was greater in mt from Dia; oxidative phosphorylation (OXPHOS) was also greater in Dia and influenced by time postmortem (muscle × time: P = 0.01). Intrinsic leak and OXPHOS were affected by muscle and time (muscle × time: P = 0.05 and P = 0.01, respectively), with the most pronounced differences at 24 h postmortem. Stimulation of OXPHOS by cytochrome c as an indicator of outer mt membrane integrity was influenced by muscle and time postmortem (muscle × time: P = 0.03); it was greater in mt from LL. Despite intrinsic differences in respiratory function at 24 h, mt from both muscles were intact and coupled at 1 h postmortem. Reduced content and respiratory function in mt from LL are associated with early fragmentation, which could impact protease activation and subsequently meat quality.
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Field SL, Marrero MG, Dado-Senn B, Skibiel AL, Ramos PM, Scheffler TL, Laporta J. Peripheral serotonin regulates glucose and insulin metabolism in Holstein dairy calves. Domest Anim Endocrinol 2021; 74:106519. [PMID: 32739765 DOI: 10.1016/j.domaniend.2020.106519] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 06/24/2020] [Accepted: 07/02/2020] [Indexed: 12/28/2022]
Abstract
Peripheral serotonin regulates energy metabolism in several mammalian species, however, the potential contribution of serotonergic mechanisms as metabolic and endocrine regulators in growing dairy calves remain unexplored. Objectives were to characterize the role of serotonin in glucose and insulin metabolism in dairy calves with increased serotonin bioavailability. Milk replacer was supplemented with saline, 5-hydroxytryptophan (90 mg/d), or fluoxetine (40 mg/d) for 10-d (n = 8/treatment). Blood was collected daily during supplementation and on days 2, 7, and 14 during withdrawal. Calves were euthanized after 10-d supplementation or 14-d withdrawal periods to harvest liver and pancreas tissue. 5-hydroxytryptophan increased circulating insulin concentrations during the supplementation period, whereas both treatments increased circulating glucose concentration during the withdrawal period. The liver and pancreas of preweaned calves express serotonin factors (ie, TPH1, SERT, and cell surface receptors), indicating their ability to synthesize, uptake, and respond to serotonin. Supplementation of 5-hydroxytryptophan increased hepatic and pancreatic serotonin concentrations. After the withdrawal period, fluoxetine cleared from the pancreas but not liver tissue. Supplementation of 5-hydroxytryptophan upregulated hepatic mRNA expression of serotonin receptors (ie, 5-HTR1B, -1D, -2A, and -2B), and downregulated pancreatic 5-HTR1F mRNA and insulin-related proteins (ie, Akt and pAkt). Fluoxetine-supplemented calves had fewer pancreatic islets per microscopic field with reduced insulin intensity, whereas 5-hydroxytryptophan supplemented calves had increased islet number and area with greater insulin and serotonin and less glucagon intensities. After the 14-d withdrawal of 5-hydroxytryptophan, hepatic mRNA expression of glycolytic and gluconeogenic enzymes were simultaneously downregulated. Improving serotonin bioavailability could serve as a potent regulator of endocrine and metabolic processes in dairy calves.
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Affiliation(s)
- S L Field
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608, USA
| | - M G Marrero
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608, USA
| | - B Dado-Senn
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608, USA
| | - A L Skibiel
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608, USA
| | - P M Ramos
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608, USA
| | - T L Scheffler
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608, USA
| | - J Laporta
- Department of Animal Sciences, University of Florida, Gainesville, FL 32608, USA.
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McCoy J, Cadegiani FA, Wambier CG, Herrera S, Vaño-Galván S, Mesinkovska NA, Ramos PM, Shapiro J, Sinclair R, Tosti A, Goren A. 5-alpha-reductase inhibitors are associated with reduced frequency of COVID-19 symptoms in males with androgenetic alopecia. J Eur Acad Dermatol Venereol 2020; 35:e243-e246. [PMID: 33135263 DOI: 10.1111/jdv.17021] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J McCoy
- Applied Biology, Inc., Irvine, CA, USA
| | - F A Cadegiani
- Department of Clinical Endocrinology, Federal University of São Paulo Medical School, Sao Paulo, Brazil
| | - C G Wambier
- Department of Dermatology, Alpert Medical School of Brown University, Providence, RI, USA
| | - S Herrera
- Infectious Diseases Unit, Ramón y Cajal Hospital, Madrid, Spain
| | - S Vaño-Galván
- Dermatology Department, Ramón y Cajal Hospital, Madrid, Spain
| | - N A Mesinkovska
- Department of Dermatology, University of Claifornia, Irvine, CA, USA
| | - P M Ramos
- Department of Dermatology, São Paulo State University - UNESP, São Paulo, Brazil
| | - J Shapiro
- Ronald O. Perelman Department of Dermatology, New York University School of Medicine, New York, NY, USA
| | - R Sinclair
- Sinclair Dermatology, Melbourne, Vic., Australia
| | - A Tosti
- Department of Dermatology and Cutaneous Surgery, Miller School of Medicine, University of Miami, Miami, FL, USA
| | - A Goren
- Applied Biology, Inc., Irvine, CA, USA
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Goren A, Wambier CG, Herrera S, McCoy J, Vaño-Galván S, Gioia F, Comeche B, Ron R, Serrano-Villar S, Ramos PM, Cadegiani FA, Kovacevic M, Tosti A, Shapiro J, Sinclair R. Anti-androgens may protect against severe COVID-19 outcomes: results from a prospective cohort study of 77 hospitalized men. J Eur Acad Dermatol Venereol 2020; 35:e13-e15. [PMID: 32977363 PMCID: PMC7536996 DOI: 10.1111/jdv.16953] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 09/04/2020] [Accepted: 09/08/2020] [Indexed: 11/30/2022]
Affiliation(s)
- A Goren
- Applied Biology, Inc., Irvine, CA, USA
| | - C G Wambier
- Department of Dermatology, Alpert Medical School of Brown University, Providence, RI, USA
| | - S Herrera
- Infectious Diseases Unit, Ramón y Cajal Hospital, Madrid, Spain
| | - J McCoy
- Applied Biology, Inc., Irvine, CA, USA
| | - S Vaño-Galván
- Dermatology Department, Ramón y Cajal Hospital, Madrid, Spain
| | - F Gioia
- Infectious Diseases Unit, Ramón y Cajal Hospital, Madrid, Spain
| | - B Comeche
- Infectious Diseases Unit, Ramón y Cajal Hospital, Madrid, Spain
| | - R Ron
- Infectious Diseases Unit, Ramón y Cajal Hospital, Madrid, Spain
| | | | - P M Ramos
- Department of Dermatology, São Paulo State University, Botucatu, Brazil
| | - F A Cadegiani
- Department of Clinical Endocrinology, Federal University of São Paulo Medical School, Sao Paulo, Brazil
| | - M Kovacevic
- Department of Dermatology and Venereology, Hospital Sestre Milosrdnice, Zagreb, Croatia
| | - A Tosti
- Department of Dermatology and Cutaneous Surgery, Miller School of Medicine, University of Miami, Miami, FL, USA
| | - J Shapiro
- Ronald O. Perelman Department of Dermatology at the New York University School of Medicine, New York, NY, USA
| | - R Sinclair
- Sinclair Dermatology, Melbourne, VIC, Australia
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Ramos PM, Li C, Elzo MA, Wohlgemuth SE, Scheffler TL. Mitochondrial oxygen consumption in early postmortem permeabilized skeletal muscle fibers is influenced by cattle breed. J Anim Sci 2020; 98:skaa044. [PMID: 32171017 PMCID: PMC7071943 DOI: 10.1093/jas/skaa044] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 02/05/2020] [Indexed: 12/17/2022] Open
Abstract
Functional properties and integrity of skeletal muscle mitochondria (mt) during the early postmortem period may influence energy metabolism and pH decline, thereby impacting meat quality development. Angus typically produce more tender beef than Brahman, a Bos indicus breed known for heat tolerance. Thus, our objectives were to compare mt respiratory function in muscle collected early postmortem (1 h) from Angus and Brahman steers (n = 26); and to evaluate the effect of normal and elevated temperature on mt function ex vivo. We measured mt oxygen consumption rate (OCR) in fresh-permeabilized muscle fibers from Longissimus lumborum (LL) at 2 temperatures (38.5 and 40.0 °C) and determined citrate synthase (CS) activity and expression of several mt proteins. The main effects of breed, temperature, and their interaction were tested for mt respiration, and breed effect was tested for CS activity and protein expression. Breed, but not temperature (P > 0.40), influenced mt OCR (per tissue weight), with Brahman exhibiting greater complex I+II-mediated oxidative phosphorylation capacity (P = 0.05). Complex I- and complex II-mediated OCR also tended to be greater in Brahman (P = 0.07 and P = 0.09, respectively). Activity of CS was higher in LL from Brahman compared to Angus (P = 0.05). Expression of specific mt proteins did not differ between breeds, except for higher expression of adenosine triphosphate (ATP) synthase subunit 5 alpha in Brahman muscle (P = 0.04). Coupling control ratio differed between breeds (P = 0.05), revealing greater coupling between oxygen consumption and phosphorylation in Brahman. Our data demonstrate that both Angus and Brahman mt retained functional capacity and integrity 1-h postmortem; greater oxidative phosphorylation capacity and coupling in Brahman mt could be related to heat tolerance and impact early postmortem metabolism.
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Affiliation(s)
- Patricia M Ramos
- Department of Animal Sciences, “Luiz de Queiroz” College of Agriculture, University of Sao Paulo, Piracicaba, SP, Brazil
- Department of Animal Sciences, University of Florida, Gainesville, FL
| | - Chengcheng Li
- Department of Animal Sciences, University of Florida, Gainesville, FL
| | - Mauricio A Elzo
- Department of Animal Sciences, University of Florida, Gainesville, FL
| | | | - Tracy L Scheffler
- Department of Animal Sciences, University of Florida, Gainesville, FL
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Ramos PM, Wright SA, Delgado EF, van Santen E, Johnson DD, Scheffler JM, Elzo MA, Carr CC, Scheffler TL. Resistance to pH decline and slower calpain-1 autolysis are associated with higher energy availability early postmortem in Bos taurus indicus cattle. Meat Sci 2019; 159:107925. [PMID: 31476681 DOI: 10.1016/j.meatsci.2019.107925] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 08/23/2019] [Accepted: 08/23/2019] [Indexed: 11/16/2022]
Abstract
Beef from Bos taurus indicus is associated with toughness compared to Bos taurus taurus, suggesting there is antagonism between adaptability to heat and beef quality. Resistance to cellular stress in muscle may be protective postmortem, thereby delaying its conversion to meat. Therefore, our objective was to determine pH decline, calpain-1 and caspase 3 activation, and proteolysis in different biological cattle types. Angus, Brangus, and Brahman steers (n = 18) were harvested, and Longissimus lumborum were assessed postmortem for pH decline, ATP content, protease activation, and calpastatin content; and myofibrillar protein degradation was evaluated in beef aged to 14d. Brahman Longissimus lumborum exhibited resistance to pH decline, greater ATP content at 1 h, and delayed calpain-1 autolysis. Although content of caspase-3 zymogen was lower in Brahman, there was no evidence of caspase-3 mediated proteolysis. Greater resistance to energetic and pH changes early postmortem in Brahman Longissimus lumborum are associated with calpain-1 autolysis but not mitochondria mediated apoptosis.
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Affiliation(s)
- Patricia M Ramos
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611-0910, USA; Department of Animal Sciences, "Luiz de Queiroz" College of Agriculture, University of Sao Paulo, Av. Padua Dias, 11, CEP, 13418-900 Piracicaba, Sao Paulo, Brazil
| | - Shelby A Wright
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611-0910, USA
| | - Eduardo F Delgado
- Department of Animal Sciences, "Luiz de Queiroz" College of Agriculture, University of Sao Paulo, Av. Padua Dias, 11, CEP, 13418-900 Piracicaba, Sao Paulo, Brazil
| | - Edzard van Santen
- Agronomy Department, University of Florida, Gainesville, FL 32611-0500, USA
| | - D Dwain Johnson
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611-0910, USA
| | - Jason M Scheffler
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611-0910, USA
| | - Mauricio A Elzo
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611-0910, USA
| | - C Chad Carr
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611-0910, USA
| | - Tracy L Scheffler
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611-0910, USA.
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