1
|
Mau T, Blackwell TL, Cawthon PM, Molina AJA, Coen PM, Distefano G, Kramer PA, Ramos SV, Forman DE, Goodpaster BH, Toledo FGS, Duchowny KA, Sparks LM, Newman AB, Kritchevsky SB, Cummings SR. Muscle Mitochondrial Bioenergetic Capacities Are Associated With Multimorbidity Burden in Older Adults: The Study of Muscle, Mobility and Aging. J Gerontol A Biol Sci Med Sci 2024; 79:glae101. [PMID: 38605684 PMCID: PMC11167490 DOI: 10.1093/gerona/glae101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Indexed: 04/13/2024] Open
Abstract
BACKGROUND The geroscience hypothesis posits that aging biological processes contribute to many age-related deficits, including the accumulation of multiple chronic diseases. Though only one facet of mitochondrial function, declines in muscle mitochondrial bioenergetic capacities may contribute to this increased susceptibility to multimorbidity. METHODS The Study of Muscle, Mobility and Aging (SOMMA) assessed ex vivo muscle mitochondrial energetics in 764 older adults (mean age = 76.4, 56.5% women, and 85.9% non-Hispanic White) by high-resolution respirometry of permeabilized muscle fibers. We estimated the proportional odds ratio (POR [95% CI]) for the likelihood of greater multimorbidity (4 levels: 0 conditions, N = 332; 1 condition, N = 299; 2 conditions, N = 98; or 3+ conditions, N = 35) from an index of 11 conditions, per SD decrement in muscle mitochondrial energetic parameters. Distribution of conditions allowed for testing the associations of maximal muscle energetics with some individual conditions. RESULTS Lower oxidative phosphorylation supported by fatty acids and/or complex I- and II-linked carbohydrates (eg, Max OXPHOSCI+CII) was associated with a greater multimorbidity index score (POR = 1.32 [1.13, 1.54]) and separately with diabetes mellitus (OR = 1.62 [1.26, 2.09]), depressive symptoms (OR = 1.45 [1.04, 2.00]) and possibly chronic kidney disease (OR = 1.57 [0.98, 2.52]) but not significantly with other conditions (eg, cardiac arrhythmia, chronic obstructive pulmonary disease). CONCLUSIONS Lower muscle mitochondrial bioenergetic capacities were associated with a worse composite multimorbidity index score. Our results suggest that decrements in muscle mitochondrial energetics may contribute to a greater global burden of disease and are more strongly related to some conditions than others.
Collapse
Affiliation(s)
- Theresa Mau
- San Francisco Coordinating Center, California Pacific Medical Center Research Institute, San Francisco, California, USA
- Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, California, USA
| | - Terri L Blackwell
- San Francisco Coordinating Center, California Pacific Medical Center Research Institute, San Francisco, California, USA
| | - Peggy M Cawthon
- San Francisco Coordinating Center, California Pacific Medical Center Research Institute, San Francisco, California, USA
- Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, California, USA
| | - Anthony J A Molina
- Division of Geriatrics, Gerontology, and Palliative Care, Department of Medicine, University of California San Diego School of Medicine, La Jolla, California, USA
| | - Paul M Coen
- Translational Research Institute, AdventHealth, Orlando, Florida, USA
| | | | - Philip A Kramer
- Gerontology and Geriatric Medicine, Department of Internal Medicine, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | - Sofhia V Ramos
- Translational Research Institute, AdventHealth, Orlando, Florida, USA
| | - Daniel E Forman
- Division of Geriatrics and Cardiology, Department of Medicine, University of Pittsburgh, Geriatrics Research, Education, and Clinical Care (GRECC), VA Pittsburgh Healthcare System, Pittsburgh, Pennsylvania, USA
| | - Bret H Goodpaster
- Translational Research Institute, AdventHealth, Orlando, Florida, USA
| | - Frederico G S Toledo
- Division of Endocrinology and Metabolism, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Kate A Duchowny
- Social Environment and Health, Survey Research Center, Institute for Social Research, University of Michigan, Ann Arbor, Michigan, USA
| | - Lauren M Sparks
- Translational Research Institute, AdventHealth, Orlando, Florida, USA
| | - Anne B Newman
- Department of Epidemiology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Stephen B Kritchevsky
- Gerontology and Geriatric Medicine, Department of Internal Medicine, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | - Steven R Cummings
- San Francisco Coordinating Center, California Pacific Medical Center Research Institute, San Francisco, California, USA
- Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, California, USA
| |
Collapse
|
2
|
Zamora Z, Lui LY, Sparks LM, Justice J, Lyles M, Gentle L, Gregory H, Yeo RX, Kershaw EE, Stefanovic-Racic M, Newman AB, Kritchevsky S, Toledo FGS. Percutaneous biopsies of skeletal muscle and adipose tissue in individuals older than 70: methods and outcomes in the Study of Muscle, Mobility and Aging (SOMMA). GeroScience 2024; 46:3419-3428. [PMID: 38315316 PMCID: PMC11009187 DOI: 10.1007/s11357-024-01087-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Accepted: 01/26/2024] [Indexed: 02/07/2024] Open
Abstract
Biopsies of muscle and adipose tissue (AT) are useful tools to gain insights into the aging processes in these tissues. However, they are invasive procedures and their risk/benefit profile in older adults can be altered by sarcopenia, frailty, poor healing, and multimorbidity. Their success rates, safety, and tolerability in a geriatric population have not been reported in detail. Investigators in the Study of Muscle, Mobility, and Aging (SOMMA) performed biopsies of muscle and AT in older adults and prospectively collected data on biopsy success rates, safety, and tolerability. We report here the methods and outcomes of these two procedures. In total, 861 participants (aged 70-94) underwent percutaneous biopsies of the Vastus lateralis muscle with a Bergstrom needle. A subset (n = 241) also underwent percutaneous biopsies of the abdominal subcutaneous AT with the tumescent liposuction technique. Success rate was assessed by the percentage of biopsies yielding adequate specimens for analyses; tolerability by pain scores; and safety by frequency of adverse events. All data were prospectively collected. The overall muscle biopsy success rate was 97.1% and was modestly lower in women. The AT biopsy success rate was 95.9% and slightly lower in men. Minimal or no pain was reported in 68% of muscle biopsies and in 83% of AT biopsies. Adverse events occurred in 2.67% of muscle biopsies and 4.15% of AT biopsies. None was serious. In older adults, percutaneous muscle biopsies and abdominal subcutaneous AT biopsies have an excellent safety profile, often achieve adequate tissue yields for analyses, and are well tolerated.
Collapse
Affiliation(s)
- Zeke Zamora
- Internal Medicine Section On Gerontology and Geriatrics, Wake Forest School of Medicine, Winston-Salem, NC, USA
- Sticht Center for Healthy Aging and Alzheimer's Prevention, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Li-Yung Lui
- Research Institute, California Pacific Medical Center, San Francisco, CA, USA
| | - Lauren M Sparks
- Translational Research Institute, AdventHealth, Orlando, FL, USA
| | - Jamie Justice
- Internal Medicine Section On Gerontology and Geriatrics, Wake Forest School of Medicine, Winston-Salem, NC, USA
- Sticht Center for Healthy Aging and Alzheimer's Prevention, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Mary Lyles
- Internal Medicine Section On Gerontology and Geriatrics, Wake Forest School of Medicine, Winston-Salem, NC, USA
- Sticht Center for Healthy Aging and Alzheimer's Prevention, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Landon Gentle
- Sticht Center for Healthy Aging and Alzheimer's Prevention, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Heather Gregory
- Sticht Center for Healthy Aging and Alzheimer's Prevention, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Reichelle X Yeo
- Translational Research Institute, AdventHealth, Orlando, FL, USA
| | - Erin E Kershaw
- Division of Endocrinology and Metabolism, Dept. of Medicine, School of Medicine, University of Pittsburgh, 200 Lothrop Street BST-W1055, Pittsburgh, PA, 15261, USA
| | - Maja Stefanovic-Racic
- Division of Endocrinology and Metabolism, Dept. of Medicine, School of Medicine, University of Pittsburgh, 200 Lothrop Street BST-W1055, Pittsburgh, PA, 15261, USA
| | - Anne B Newman
- Dept. of Epidemiology, School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - Stephen Kritchevsky
- Internal Medicine Section On Gerontology and Geriatrics, Wake Forest School of Medicine, Winston-Salem, NC, USA
- Sticht Center for Healthy Aging and Alzheimer's Prevention, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Frederico G S Toledo
- Division of Endocrinology and Metabolism, Dept. of Medicine, School of Medicine, University of Pittsburgh, 200 Lothrop Street BST-W1055, Pittsburgh, PA, 15261, USA.
| |
Collapse
|
3
|
Cummings SR, Coen PM, Ferrucci L. The cellular bases of mobility from the Study of Muscle, Mobility and Aging (SOMMA). Aging Cell 2024; 23:e14129. [PMID: 38429931 PMCID: PMC11166358 DOI: 10.1111/acel.14129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Accepted: 02/14/2024] [Indexed: 03/03/2024] Open
Abstract
Findings from the Study of Muscle, Mobility and Aging (SOMMA) in this issue of Aging Cell show that several biological pathways in skeletal muscle cells play an important role in determining mobility in older adults. These are based on assays in skeletal muscle biopsies obtained from participants, aged 70 years and older in SOMMA tested for association with assessments related to mobility, including muscle mass, strength, power, cardiopulmonary fitness, and 400 m walking speed. The papers show that, using mass spectrometry, oxidative modifications of proteins essential to myocellular function are associated with poorer mobility. Using RNA-seq to quantify gene expression, lower levels of expression of antioxidant enzymes located in mitochondria, autophagy, patterns of expression of genes involved in autophagy, and higher levels of RNA transcripts that increase with denervation were associated with poorer performance on tests of mobility. These results extend previous research from the Baltimore Longitudinal Study of Aging and recent studies from SOMMA showing the importance of mitochondrial energetics in mobility. Together, these findings are painting a picture of how fundamental cellular processes influence the loss of mobility with aging. They may also be a window on aging in other cells, tissues, and systems. The data collected in SOMMA are publicly available and SOMMA welcomes collaborations with scientists who are interested in research about human aging.
Collapse
Affiliation(s)
- Steven R. Cummings
- San Francisco Coordinating CenterCalifornia Pacific Research InstituteSan FranciscoCaliforniaUSA
- Department of Epidemiology and BiostatisticsUniversity of CaliforniaSan FranciscoCaliforniaUSA
| | - Paul M. Coen
- Translational Research Institute, AdventHealthOrlandoFloridaUSA
| | - Luigi Ferrucci
- Intramural Research Program of the National Institute on Aging, NIA, NIHBaltimoreMarylandUSA
| |
Collapse
|