Cited by 103Advanced MRI Techniques and ApplicationsCardiovascular and exercise physiologyMuscle metabolism and nutrition

Measurement of human skeletal muscle oxidative capacity by 31 P‐MR spectroscopy: A cross‐validation with in vitro measurements

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Lanza, Ian R., Bhagra, Sumit, Nair, K. Sreekumaran, Port, John D.·2011·Journal of Magnetic Resonance Imaging

Abstract

Purpose: To cross‐validate skeletal muscle oxidative capacity measured by 31 P‐MR spectroscopy with in vitro measurements of oxidative capacity in mitochondria isolated from muscle biopsies of the same muscle group in 18 healthy adults. Materials and Methods: Oxidative capacity in vivo was determined from PCr recovery kinetics following a 30‐s maximal isometric knee extension. State 3 respiration was measured in isolated mitochondria using high‐resolution respirometry. A second cohort of 10 individuals underwent two 31 P‐MRS testing sessions to assess the test–retest reproducibility of the method. Results: Overall, the in vivo and in vitro methods were well‐correlated (r = 0.66–0.72) and showed good agreement by Bland Altman plots. Excellent reproducibility was observed for the PCr recovery rate constant (CV = 4.6%; ICC = 0.85) and calculated oxidative capacity (CV = 3.4%; ICC = 0.83). Conclusion: These results indicate that 31 P‐MRS corresponds well with gold‐standard in vitro measurements and is highly reproducible. J. Magn. Reson. Imaging 2011;. © 2011 Wiley Periodicals, Inc.

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Authors
Lanza, I. R., Bhagra, S., Nair, K. S., & Port, J. D.
Affiliations
Mayo Clinic (US)
Corresponding author
Port, John D.
Venue
Journal of Magnetic Resonance Imaging
Publisher
Wiley
Published
2011-08-16
Volume
34
Issue
5
Pages
1143-1150
ISSN
  • 1053-1807 (ISSN-L)
  • 1522-2586
OpenAlex
W2078374194
Cited by
103
References
32
Citations by year
2026: 6 · 2025: 7 · 2024: 6 · 2023: 8 · 2022: 3 · 2021: 6 · 2020: 6 · 2019: 8 · 2018: 9 · 2017: 5 · 2016: 8 · 2015: 8 · 2014: 10 · 2013: 11 · 2012: 2
FWCI
5.61
Type
journal article
Language
en
Open access
Locations
  • Journal of Magnetic Resonance Imaging (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Mayo Clinic
  • National Institutes of Health (UL1-RR-025150)
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK4197, R01DK041973)
  • National Center for Research Resources (KL2 RR02415, KL2RR024151, UL1-RR-025150, UL1RR024150)
Topics
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced MRI Techniques and Applications
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
Keywords
skeletal muscle oxidative capacity, 31P NMR, isolated mitochondria, state 3 respiration, high-resolution respirometry, cross-validation, test-retest reproducibility, muscle biopsy
MeSH terms
Adult, Biopsy, Female, Humans, Hydrogen-Ion Concentration, Knee, Male, Middle Aged, Mitochondria, Muscles, Magnetic Resonance Spectroscopy, Oxygen, Phosphocreatine, Phosphorus Isotopes, Reproducibility of Results, Cohort Studies, Oxidative Stress, Muscle, Skeletal, In Vitro Techniques

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