Difference between revisions of "Viana 2019 Sci Rep"

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(Created page with "{{Publication |title=Viana LR, Tobar N, Busanello ENB, Marques AC, de Oliveira AG, Lima TI, Machado G, Castelucci BG, Ramos CD, Brunetto SQ, Silveira LR, Vercesi AE, Consonni...")
 
 
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|year=2019
 
|year=2019
 
|journal=Sci Rep
 
|journal=Sci Rep
|abstract=Leucine can stimulate protein synthesis in skeletal muscle, and recent studies have shown an increase in leucine-related mitochondrial biogenesis and oxidative phosphorylation capacity in muscle cells. However, leucine-related effects in tumour tissues are still poorly understood. Thus, we described the effects of leucine in both ''in vivo'' and ''in vitro'' models of a Walker-256 tumour. Tumour-bearing Wistar rats were randomly distributed into a control group (W; normoprotein diet) and leucine group (LW; leucine-rich diet [normoprotein + 3% leucine]). After 20 days of tumour evolution, the animals underwent <sup>18</sup>-fludeoxyglucose positron emission computed tomography (<sup>18</sup>F-FDG PET-CT) imaging, and after euthanasia, fresh tumour biopsy samples were taken for oxygen consumption rate measurements (Oroboros Oxygraph), electron microscopy analysis and RNA and protein extraction. Our main results from the LW group showed no tumour size change, lower tumour glucose (18F-FDG) uptake, and reduced metastatic sites. Furthermore, leucine stimulated a shift in tumour metabolism from glycolytic towards oxidative phosphorylation, higher mRNA and protein expression of oxidative phosphorylation components, and enhanced mitochondrial density/area even though the leucine-treated tumour had a higher number of apoptotic nuclei with increased oxidative stress. In summary, a leucine-rich diet directed Walker-256 tumour metabolism to a less glycolytic phenotype profile in which these metabolic alterations were associated with a decrease in tumour aggressiveness and reduction in the number of metastatic sites in rats fed a diet supplemented with this branched-chain amino acid.
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|abstract=Leucine can stimulate protein synthesis in skeletal muscle, and recent studies have shown an increase in leucine-related mitochondrial biogenesis and oxidative phosphorylation capacity in muscle cells. However, leucine-related effects in tumour tissues are still poorly understood. Thus, we described the effects of leucine in both ''in vivo'' and ''in vitro'' models of a Walker-256 tumour. Tumour-bearing Wistar rats were randomly distributed into a control group (W; normoprotein diet) and leucine group (LW; leucine-rich diet [normoprotein + 3% leucine]). After 20 days of tumour evolution, the animals underwent <sup>18</sup>-fludeoxyglucose positron emission computed tomography (<sup>18</sup>F-FDG PET-CT) imaging, and after euthanasia, fresh tumour biopsy samples were taken for oxygen consumption rate measurements (Oroboros Oxygraph), electron microscopy analysis and RNA and protein extraction. Our main results from the LW group showed no tumour size change, lower tumour glucose (<sup>18</sup>F-FDG) uptake, and reduced metastatic sites. Furthermore, leucine stimulated a shift in tumour metabolism from glycolytic towards oxidative phosphorylation, higher mRNA and protein expression of oxidative phosphorylation components, and enhanced mitochondrial density/area even though the leucine-treated tumour had a higher number of apoptotic nuclei with increased oxidative stress. In summary, a leucine-rich diet directed Walker-256 tumour metabolism to a less glycolytic phenotype profile in which these metabolic alterations were associated with a decrease in tumour aggressiveness and reduction in the number of metastatic sites in rats fed a diet supplemented with this branched-chain amino acid.
 
|editor=[[Plangger M]],
 
|editor=[[Plangger M]],
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|mipnetlab=BR Campinas Vercesi AE
 
}}
 
}}
 
{{Labeling
 
{{Labeling
|area=Respiration
+
|area=Respiration, Exercise physiology;nutrition;life style
 +
|diseases=Cancer
 +
|organism=Rat
 +
|tissues=Endothelial;epithelial;mesothelial cell
 +
|preparations=Permeabilized tissue
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|couplingstates=LEAK, OXPHOS
 +
|pathways=N
 
|instruments=Oxygraph-2k
 
|instruments=Oxygraph-2k
 
|additional=Labels, 2019-11,
 
|additional=Labels, 2019-11,
 
}}
 
}}

Latest revision as of 10:47, 4 November 2019

Publications in the MiPMap
Viana LR, Tobar N, Busanello ENB, Marques AC, de Oliveira AG, Lima TI, Machado G, Castelucci BG, Ramos CD, Brunetto SQ, Silveira LR, Vercesi AE, Consonni SR, Gomes-Marcondes MCC (2019) Leucine-rich diet induces a shift in tumour metabolism from glycolytic towards oxidative phosphorylation, reducing glucose consumption and metastasis in Walker-256 tumour-bearing rats. Sci Rep 9:15529.

» PMID: 31664147 Open Access

Viana LR, Tobar N, Busanello ENB, Marques AC, de Oliveira AG, Lima TI, Machado G, Castelucci BG, Ramos CD, Brunetto SQ, Silveira LR, Vercesi AE, Consonni SR, Gomes-Marcondes MCC (2019) Sci Rep

Abstract: Leucine can stimulate protein synthesis in skeletal muscle, and recent studies have shown an increase in leucine-related mitochondrial biogenesis and oxidative phosphorylation capacity in muscle cells. However, leucine-related effects in tumour tissues are still poorly understood. Thus, we described the effects of leucine in both in vivo and in vitro models of a Walker-256 tumour. Tumour-bearing Wistar rats were randomly distributed into a control group (W; normoprotein diet) and leucine group (LW; leucine-rich diet [normoprotein + 3% leucine]). After 20 days of tumour evolution, the animals underwent 18-fludeoxyglucose positron emission computed tomography (18F-FDG PET-CT) imaging, and after euthanasia, fresh tumour biopsy samples were taken for oxygen consumption rate measurements (Oroboros Oxygraph), electron microscopy analysis and RNA and protein extraction. Our main results from the LW group showed no tumour size change, lower tumour glucose (18F-FDG) uptake, and reduced metastatic sites. Furthermore, leucine stimulated a shift in tumour metabolism from glycolytic towards oxidative phosphorylation, higher mRNA and protein expression of oxidative phosphorylation components, and enhanced mitochondrial density/area even though the leucine-treated tumour had a higher number of apoptotic nuclei with increased oxidative stress. In summary, a leucine-rich diet directed Walker-256 tumour metabolism to a less glycolytic phenotype profile in which these metabolic alterations were associated with a decrease in tumour aggressiveness and reduction in the number of metastatic sites in rats fed a diet supplemented with this branched-chain amino acid.


Bioblast editor: Plangger M O2k-Network Lab: BR Campinas Vercesi AE


Labels: MiParea: Respiration, Exercise physiology;nutrition;life style  Pathology: Cancer 

Organism: Rat  Tissue;cell: Endothelial;epithelial;mesothelial cell  Preparation: Permeabilized tissue 


Coupling state: LEAK, OXPHOS  Pathway:HRR: Oxygraph-2k 

Labels, 2019-11