Mitochondrial ATP synthase β‐subunit production rate and ATP synthase specific activity are reduced in skeletal muscle of humans with obesity

New Findings What is the central question of this study? Humans with obesity have lower ATP synthesis in muscle along with lower content of the β‐subunit of the ATP synthase (β‐F1‐ATPase), the catalytic component of the ATP synthase. Does lower synthesis rate of β‐F1‐ATPase in muscle contribute to t...

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Published inExperimental physiology Vol. 104; no. 1; pp. 126 - 135
Main Authors Tran, Lee, Langlais, Paul R., Hoffman, Nyssa, Roust, Lori, Katsanos, Christos S.
Format Journal Article
LanguageEnglish
Published England John Wiley & Sons, Inc 01.01.2019
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Abstract New Findings What is the central question of this study? Humans with obesity have lower ATP synthesis in muscle along with lower content of the β‐subunit of the ATP synthase (β‐F1‐ATPase), the catalytic component of the ATP synthase. Does lower synthesis rate of β‐F1‐ATPase in muscle contribute to these responses in humans with obesity? What is the main finding and its importance? Humans with obesity have a lower synthesis rate of β‐F1‐ATPase and ATP synthase specific activity in muscle. These findings indicate that reduced production of subunits forming the ATP synthase in muscle may contribute to impaired generation of ATP in obesity. The content of the β‐subunit of the ATP synthase (β‐F1‐ATPase), which forms the catalytic site of the enzyme ATP synthase, is reduced in muscle of obese humans, along with a reduced capacity for ATP synthesis. We studied 18 young (37 ± 8 years) subjects of which nine were lean (BMI = 23 ± 2 kg m−2) and nine were obese (BMI = 34 ± 3 kg m−2) to determine the fractional synthesis rate (FSR) and gene expression of β‐F1‐ATPase, as well as the specific activity of the ATP synthase. FSR of β‐F1‐ATPase was determined using a combination of isotope tracer infusion and muscle biopsies. Gene expression of β‐F1‐ATPase and specific activity of the ATP synthase were determined in the muscle biopsies. When compared to lean, obese subjects had lower muscle β‐F1‐ATPase FSR (0.10 ± 0.05 vs. 0.06 ± 0.03% h−1; P < 0.05) and protein expression (P < 0.05), but not mRNA expression (P > 0.05). Across subjects, abundance of β‐F1‐ATPase correlated with the FSR of β‐F1‐ATPase (P < 0.05). The specific activity of muscle ATP synthase was lower in obese compared to lean subjects (0.035 ± 0.004 vs. 0.042 ± 0.007 arbitrary units; P < 0.05), but this difference was not significant after the activity of the ATP synthase was adjusted to the β‐F1‐ATPase content (P > 0.05). Obesity impairs the synthesis of β‐F1‐ATPase in muscle at the translational level, reducing the content of β‐F1‐ATPase in parallel with reduced capacity for ATP generation via the ATP synthase complex.
AbstractList What is the central question of this study? Humans with obesity have lower ATP synthesis in muscle along with lower content of the β-subunit of the ATP synthase (β-F1-ATPase), the catalytic component of the ATP synthase. Does lower synthesis rate of β-F1-ATPase in muscle contribute to these responses in humans with obesity? What is the main finding and its importance? Humans with obesity have a lower synthesis rate of β-F -ATPase and ATP synthase specific activity in muscle. These findings indicate that reduced production of subunits forming the ATP synthase in muscle may contribute to impaired generation of ATP in obesity. The content of the β-subunit of the ATP synthase (β-F -ATPase), which forms the catalytic site of the enzyme ATP synthase, is reduced in muscle of obese humans, along with a reduced capacity for ATP synthesis. We studied 18 young (37 ± 8 years) subjects of which nine were lean (BMI = 23 ± 2 kg m ) and nine were obese (BMI = 34 ± 3 kg m ) to determine the fractional synthesis rate (FSR) and gene expression of β-F -ATPase, as well as the specific activity of the ATP synthase. FSR of β-F -ATPase was determined using a combination of isotope tracer infusion and muscle biopsies. Gene expression of β-F -ATPase and specific activity of the ATP synthase were determined in the muscle biopsies. When compared to lean, obese subjects had lower muscle β-F -ATPase FSR (0.10 ± 0.05 vs. 0.06 ± 0.03% h ; P < 0.05) and protein expression (P < 0.05), but not mRNA expression (P > 0.05). Across subjects, abundance of β-F -ATPase correlated with the FSR of β-F -ATPase (P < 0.05). The specific activity of muscle ATP synthase was lower in obese compared to lean subjects (0.035 ± 0.004 vs. 0.042 ± 0.007 arbitrary units; P < 0.05), but this difference was not significant after the activity of the ATP synthase was adjusted to the β-F -ATPase content (P > 0.05). Obesity impairs the synthesis of β-F -ATPase in muscle at the translational level, reducing the content of β-F -ATPase in parallel with reduced capacity for ATP generation via the ATP synthase complex.
The content of the β‐subunit of the ATP synthase (β‐F1‐ATPase), which forms the catalytic site of the enzyme ATP synthase, is reduced in muscle of obese humans, along with a reduced capacity for ATP synthesis. We studied 18 young (37 ± 8 years) subjects of which nine were lean (BMI = 23 ± 2 kg m−2) and nine were obese (BMI = 34 ± 3 kg m−2) to determine the fractional synthesis rate (FSR) and gene expression of β‐F1‐ATPase, as well as the specific activity of the ATP synthase. FSR of β‐F1‐ATPase was determined using a combination of isotope tracer infusion and muscle biopsies. Gene expression of β‐F1‐ATPase and specific activity of the ATP synthase were determined in the muscle biopsies. When compared to lean, obese subjects had lower muscle β‐F1‐ATPase FSR (0.10 ± 0.05 vs. 0.06 ± 0.03% h−1; P < 0.05) and protein expression (P < 0.05), but not mRNA expression (P > 0.05). Across subjects, abundance of β‐F1‐ATPase correlated with the FSR of β‐F1‐ATPase (P < 0.05). The specific activity of muscle ATP synthase was lower in obese compared to lean subjects (0.035 ± 0.004 vs. 0.042 ± 0.007 arbitrary units; P < 0.05), but this difference was not significant after the activity of the ATP synthase was adjusted to the β‐F1‐ATPase content (P > 0.05). Obesity impairs the synthesis of β‐F1‐ATPase in muscle at the translational level, reducing the content of β‐F1‐ATPase in parallel with reduced capacity for ATP generation via the ATP synthase complex.
The content of the beta subunit of the ATP synthase (β-F1-ATPase), which forms the catalytic site of the enzyme ATP synthase, is reduced in muscle of obese humans, along with reduced capacity for ATP synthesis. We studied 18 young (37 ± 8 years old) subjects of which nine were lean (BMI = 23 ± 2 kg/m 2 ) and nine were obese (BMI = 34 ± 3 kg/m 2 ) to determine the fractional synthesis rate (FSR) and gene expression of β-F1-ATPase, as well as the specific activity of the ATP synthase. FSR of β-F1-ATPase was determined using a combination of isotope tracer infusion and muscle biopsies. Gene expression of β-F1-ATPase and specific activity of the ATP synthase were determined in the muscle biopsies. When compared to lean, obese subjects had lower muscle β-F1-ATPase FSR (0.10 ± 0.05 vs 0.06 ± 0.03 %/hr; P < 0.05) and protein expression ( P < 0.05), but not mRNA expression ( P > 0.05). Across subjects, abundance of β-F1-ATPase correlated with the FSR of β-F1-ATPase ( P < 0.05). The specific activity of muscle ATP synthase was lower in the obese when compared to lean subjects (0.035 ± 0.004 vs 0.042 ± 0.007 arbitrary units; P < 0.05), but this difference was not significant after the activity of the ATP synthase was adjusted to the β-F1-ATPase content ( P > 0.05). Obesity impairs the synthesis of β-F1-ATPase in muscle at the translational level, reducing the content of β-F1-ATPase in parallel with reduced capacity for ATP generation via the ATP synthase complex.
New Findings What is the central question of this study? Humans with obesity have lower ATP synthesis in muscle along with lower content of the β‐subunit of the ATP synthase (β‐F1‐ATPase), the catalytic component of the ATP synthase. Does lower synthesis rate of β‐F1‐ATPase in muscle contribute to these responses in humans with obesity? What is the main finding and its importance? Humans with obesity have a lower synthesis rate of β‐F1‐ATPase and ATP synthase specific activity in muscle. These findings indicate that reduced production of subunits forming the ATP synthase in muscle may contribute to impaired generation of ATP in obesity. The content of the β‐subunit of the ATP synthase (β‐F1‐ATPase), which forms the catalytic site of the enzyme ATP synthase, is reduced in muscle of obese humans, along with a reduced capacity for ATP synthesis. We studied 18 young (37 ± 8 years) subjects of which nine were lean (BMI = 23 ± 2 kg m−2) and nine were obese (BMI = 34 ± 3 kg m−2) to determine the fractional synthesis rate (FSR) and gene expression of β‐F1‐ATPase, as well as the specific activity of the ATP synthase. FSR of β‐F1‐ATPase was determined using a combination of isotope tracer infusion and muscle biopsies. Gene expression of β‐F1‐ATPase and specific activity of the ATP synthase were determined in the muscle biopsies. When compared to lean, obese subjects had lower muscle β‐F1‐ATPase FSR (0.10 ± 0.05 vs. 0.06 ± 0.03% h−1; P < 0.05) and protein expression (P < 0.05), but not mRNA expression (P > 0.05). Across subjects, abundance of β‐F1‐ATPase correlated with the FSR of β‐F1‐ATPase (P < 0.05). The specific activity of muscle ATP synthase was lower in obese compared to lean subjects (0.035 ± 0.004 vs. 0.042 ± 0.007 arbitrary units; P < 0.05), but this difference was not significant after the activity of the ATP synthase was adjusted to the β‐F1‐ATPase content (P > 0.05). Obesity impairs the synthesis of β‐F1‐ATPase in muscle at the translational level, reducing the content of β‐F1‐ATPase in parallel with reduced capacity for ATP generation via the ATP synthase complex.
What is the central question of this study? Humans with obesity have lower ATP synthesis in muscle along with lower content of the β-subunit of the ATP synthase (β-F1-ATPase), the catalytic component of the ATP synthase. Does lower synthesis rate of β-F1-ATPase in muscle contribute to these responses in humans with obesity? What is the main finding and its importance? Humans with obesity have a lower synthesis rate of β-F1 -ATPase and ATP synthase specific activity in muscle. These findings indicate that reduced production of subunits forming the ATP synthase in muscle may contribute to impaired generation of ATP in obesity.NEW FINDINGSWhat is the central question of this study? Humans with obesity have lower ATP synthesis in muscle along with lower content of the β-subunit of the ATP synthase (β-F1-ATPase), the catalytic component of the ATP synthase. Does lower synthesis rate of β-F1-ATPase in muscle contribute to these responses in humans with obesity? What is the main finding and its importance? Humans with obesity have a lower synthesis rate of β-F1 -ATPase and ATP synthase specific activity in muscle. These findings indicate that reduced production of subunits forming the ATP synthase in muscle may contribute to impaired generation of ATP in obesity.The content of the β-subunit of the ATP synthase (β-F1 -ATPase), which forms the catalytic site of the enzyme ATP synthase, is reduced in muscle of obese humans, along with a reduced capacity for ATP synthesis. We studied 18 young (37 ± 8 years) subjects of which nine were lean (BMI = 23 ± 2 kg m-2 ) and nine were obese (BMI = 34 ± 3 kg m-2 ) to determine the fractional synthesis rate (FSR) and gene expression of β-F1 -ATPase, as well as the specific activity of the ATP synthase. FSR of β-F1 -ATPase was determined using a combination of isotope tracer infusion and muscle biopsies. Gene expression of β-F1 -ATPase and specific activity of the ATP synthase were determined in the muscle biopsies. When compared to lean, obese subjects had lower muscle β-F1 -ATPase FSR (0.10 ± 0.05 vs. 0.06 ± 0.03% h-1 ; P < 0.05) and protein expression (P < 0.05), but not mRNA expression (P > 0.05). Across subjects, abundance of β-F1 -ATPase correlated with the FSR of β-F1 -ATPase (P < 0.05). The specific activity of muscle ATP synthase was lower in obese compared to lean subjects (0.035 ± 0.004 vs. 0.042 ± 0.007 arbitrary units; P < 0.05), but this difference was not significant after the activity of the ATP synthase was adjusted to the β-F1 -ATPase content (P > 0.05). Obesity impairs the synthesis of β-F1 -ATPase in muscle at the translational level, reducing the content of β-F1 -ATPase in parallel with reduced capacity for ATP generation via the ATP synthase complex.ABSTRACTThe content of the β-subunit of the ATP synthase (β-F1 -ATPase), which forms the catalytic site of the enzyme ATP synthase, is reduced in muscle of obese humans, along with a reduced capacity for ATP synthesis. We studied 18 young (37 ± 8 years) subjects of which nine were lean (BMI = 23 ± 2 kg m-2 ) and nine were obese (BMI = 34 ± 3 kg m-2 ) to determine the fractional synthesis rate (FSR) and gene expression of β-F1 -ATPase, as well as the specific activity of the ATP synthase. FSR of β-F1 -ATPase was determined using a combination of isotope tracer infusion and muscle biopsies. Gene expression of β-F1 -ATPase and specific activity of the ATP synthase were determined in the muscle biopsies. When compared to lean, obese subjects had lower muscle β-F1 -ATPase FSR (0.10 ± 0.05 vs. 0.06 ± 0.03% h-1 ; P < 0.05) and protein expression (P < 0.05), but not mRNA expression (P > 0.05). Across subjects, abundance of β-F1 -ATPase correlated with the FSR of β-F1 -ATPase (P < 0.05). The specific activity of muscle ATP synthase was lower in obese compared to lean subjects (0.035 ± 0.004 vs. 0.042 ± 0.007 arbitrary units; P < 0.05), but this difference was not significant after the activity of the ATP synthase was adjusted to the β-F1 -ATPase content (P > 0.05). Obesity impairs the synthesis of β-F1 -ATPase in muscle at the translational level, reducing the content of β-F1 -ATPase in parallel with reduced capacity for ATP generation via the ATP synthase complex.
Author Langlais, Paul R.
Roust, Lori
Hoffman, Nyssa
Tran, Lee
Katsanos, Christos S.
AuthorAffiliation 1 Center for Metabolic and Vascular Biology, Arizona State University, Tempe, AZ 85297
2 College of Medicine, Mayo Clinic in Arizona, Scottsdale, AZ 85259
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  surname: Katsanos
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  organization: Mayo Clinic in Arizona
BackLink https://www.ncbi.nlm.nih.gov/pubmed/30362197$$D View this record in MEDLINE/PubMed
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Keywords protein synthesis
adiposity
insulin resistance
mitochondria
Language English
License 2018 The Authors. Experimental Physiology © 2018 The Physiological Society.
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Notes Funding information
This study was supported by National Institutes of Health (NIH)/National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) grant R01DK094062 (C.S.K.) and the Mayo Clinic Metabolomics Resource Core through grant U24DK100469 from the NIH/NIDDK.
Edited by: Philip Atherton
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L.T. and C.S.K were involved in the conception of the work. All authors were involved in the acquisition, analysis and interpretation of the data and in drafting and revising the manuscript for important intellectual content. All authors approved the final version of the manuscript and agree to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved. All persons designated as authors qualify for authorship, and all those who qualify for authorship are listed.
Author contributions
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Snippet New Findings What is the central question of this study? Humans with obesity have lower ATP synthesis in muscle along with lower content of the β‐subunit of...
What is the central question of this study? Humans with obesity have lower ATP synthesis in muscle along with lower content of the β-subunit of the ATP...
The content of the β‐subunit of the ATP synthase (β‐F1‐ATPase), which forms the catalytic site of the enzyme ATP synthase, is reduced in muscle of obese...
The content of the beta subunit of the ATP synthase (β-F1-ATPase), which forms the catalytic site of the enzyme ATP synthase, is reduced in muscle of obese...
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StartPage 126
SubjectTerms Adenosine triphosphatase
Adenosine Triphosphate - metabolism
adiposity
Adult
ATP synthase
Biopsy
Gene expression
Gene Expression - physiology
Humans
insulin resistance
Middle Aged
Mitochondria
Mitochondria - metabolism
Mitochondrial Proton-Translocating ATPases - metabolism
Muscle, Skeletal - metabolism
Obesity
Obesity - metabolism
protein synthesis
Skeletal muscle
Title Mitochondrial ATP synthase β‐subunit production rate and ATP synthase specific activity are reduced in skeletal muscle of humans with obesity
URI https://onlinelibrary.wiley.com/doi/abs/10.1113%2FEP087278
https://www.ncbi.nlm.nih.gov/pubmed/30362197
https://www.proquest.com/docview/2161769851
https://www.proquest.com/docview/2126901079
https://pubmed.ncbi.nlm.nih.gov/PMC6312454
Volume 104
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