Role of the Gut Microbiome on Lean Mass and Physical Function in Older Adults
Role of the Gut Microbiome and Serum Metabolome on Lean Mass and Physical Function in Older Adults
Panoramica dello studio
Stato
Condizioni
Descrizione dettagliata
In older adults (70+ years), reduced lean body mass and physical function are associated with increased disability, hospitalization, morbidity and mortality. Because older adults are the fastest growing global subpopulation, identification of mechanisms that underlie the maintenance of lean mass and physical function will be important for addressing the public health priority of healthy aging.
Gut bacteria may be involved in mechanisms that underlie the maintenance of lean mass and physical function. In support of this hypothesis, in multiple publications the investigators recently reported significant associations between circulating gut bacteria-related metabolites with these outcomes in older adults. Accordingly, the overarching study hypothesis is that is gut bacteria are associated with, and are causatively involved in mechanisms that underlie the maintenance of lean mass and physical function in older adults. To test this hypothesis, the investigators propose to: characterize the association between fecal bacteria with lean mass and physical function (AIM 1), test the causative role of gut bacteria on the maintenance of lean mass and physical function by colonizing germ-free mice with fecal bacteria from older adults (AIM 2), and examine potential mechanisms that link gut bacteria with these outcomes by identifying associations between gut bacteria and serum metabolites with lean mass and physical function (AIM 3).
Tipo di studio
Iscrizione (Effettivo)
Contatti e Sedi
Luoghi di studio
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Massachusetts
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Boston, Massachusetts, Stati Uniti, 02118-3129
- Tufts University
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Criteri di partecipazione
Criteri di ammissibilità
Età idonea allo studio
Accetta volontari sani
Sessi ammissibili allo studio
Metodo di campionamento
Popolazione di studio
Descrizione
Inclusion Criteria:
i) Willing and able to sign the IRB approved informed consent form ii) Male and Female iii) 70-85 years of age iv) BMI ≤ 35 kg/m2 v) Willing to come to the HNRCA laboratory for baseline and 1-month follow-up study visits vi) SPPB ≥ 11 ("High-Functioning", HF; 20 subjects: 10 males, 10 females) vii) 4 ≤ SPPB ≤ 7 ("Low-Functioning", LF; 20 subjects: 10 males, 10 females)
Exclusion Criteria:
i) Non-English speaker ii) Acute or terminal illness iii) Surgery in the past 6 months iv) Lower extremity fracture within the past 6 months v) Myocardial infarction in the past 6 months vi) Coronary artery disease, peripheral vascular disease, previous stroke, or history of transient ischemic attacks vii) Cognitive impairment (MMSE score < 23) viii) Uncontrolled hypertension (> 160/100 mmHg) ix) Neuromuscular disease or drugs affecting neuromuscular function x) Androgen therapy in males xi) Estrogen therapy in females xii) Significant immune disorder xiii) Kidney Failure xiv) Pancreatic disease xv) Diabetes xvi) Gastrointestinal or malabsorption diseases xvii) History of cholecystectomy xviii) Use of probiotics, prebiotics or antibiotics in the past 3 months xix) The subject has any other condition, which in the opinion of the Investigator, precludes the subject's participation in the trial.
xx) With the goal of matching the HF and LF groups for age, sex,and BMI, subjects may be excluded because their age, sex or BMI puts them outside the range needed for this study.
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
Coorti e interventi
Gruppo / Coorte |
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High Functioning
Defined by a short physical performance battery score (SPPB) greater than or equal to 11.
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Low Functioning
Defined by a short physical performance battery score (SPPB) less than or equal to 7.
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Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
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Percentage of Whole Body Lean Mass (%WBLM)
Lasso di tempo: 1 month
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%WBLM measured with dual x-ray absorptiometry (DXA).
A higher %WBLM is indicative of a higher amount of whole-body lean mass, when compared with lower values.
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1 month
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Physical Function Measurement
Lasso di tempo: 1-month
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Short physical performance battery (SPPB) score.
The SPPB is a combined measure of physical function that includes balance, a chair stand test (the time required to complete 5 chair stands), and the time needed to walk 4 meters.
Each of these 3 tests are scored from 0 to 4. The scores for each individual test are summed, and accordingly, the lowest possible SPPB score would be 0, and the highest would be 12.
A score of 12 would indicate good physical function, whereas a score of 0 is indicative of poor physical function.
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1-month
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400-meter Gait Speed
Lasso di tempo: 1-month
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Measurement of 400-meter gait speed at the 1-month study visit compared against baseline.
A slower time to walk 400 meters is indicative of worse physical function, when compared with a faster time.
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1-month
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Leg Press 1 Repetition Maximum
Lasso di tempo: 1-month
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Measurement of the leg press 1 repetition maximum at the 1-month study visit compared with baseline.
The leg press 1 repetition maximum test involves the maximum amount of weight that the participant can push with their legs.
A higher value is indicative of higher muscle strength, when compared with lower values.
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1-month
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Collaboratori e investigatori
Sponsor
Investigatori
- Investigatore principale: Michael S lustgarten, PhD, Tufts University
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Inizio studio (Effettivo)
Completamento primario (Effettivo)
Completamento dello studio (Effettivo)
Date di iscrizione allo studio
Primo inviato
Primo inviato che soddisfa i criteri di controllo qualità
Primo Inserito (Stima)
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Effettivo)
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo verificato
Maggiori informazioni
Termini relativi a questo studio
Termini MeSH pertinenti aggiuntivi
Altri numeri di identificazione dello studio
- GRANT11960287
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