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AMPLIFIed muscle mass in older cancer survivors enrolled in a diet-exercise program

参加饮食锻炼计划的老年癌症幸存者的肌肉质量增加

基本信息

批准号：
9888993
负责人：
Peggy Mannen Cawthon
金额：
$ 26.34万
依托单位：
UNIVERSITY OF CALIFORNIA BERKELEY
依托单位国家：
美国
项目类别：
财政年份：
2019
资助国家：
美国
起止时间：
2019-12-09 至 2024-11-30
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/9888993
关键词：
Activities of Daily Living Aerobic Affect Age Aging Area Behavior Therapy Body Composition Body Weight decreased Cancer Survivor Clinical Cohort Studies Control Groups Creatine Creatinine Data Diet Dietary Intervention Dual-Energy X-Ray Absorptiometry Enrollment Exercise Fasting Fatty acid glycerol esters Fracture Funding Gait speed Health Home environment Hour Individual Ingestion Intervention Intervention Trial MRI Scans Magnetic Resonance Imaging Malignant Neoplasms Measurement Measures Medical Research Methods Minority Muscle Obesity Older Population Outcome Overweight Participant Patients Performance Physical Function Physical Performance Physical activity Populations at Risk Prevalence Program Research Project Grants Quality of life Risk Rural Sampling Schedule Skeletal Muscle Surveys Testing Thinness Time Urine Venous blood sampling Visiting Nurse Woman X-Ray Computed Tomography arm cancer diagnosis capsule comparative efficacy design diet and exercise disability exercise intervention exercise program falls health assessment high risk population improved intervention effect lean body mass lifestyle intervention men muscle form novel older men older women preservation programs reduced muscle mass response rural setting sarcopenia tool treatment arm validation studies wasting weight loss intervention

项目摘要

We propose to add the measurement of muscle mass to an already funded program project grant. Rapid declines in physical functioning often occur after the diagnosis of cancer, especially among older cancer survivors; however, a handful of diet and exercise interventions have been found to ameliorate these losses. The contribution of muscle mass and changes in muscle mass in older men and women, particularly those who have survived cancer is not well characterized, partly due to the inability to directly and accurately quantify skeletal muscle mass and reliance on assessments of lean mass as a surrogate. The Adapting MultiPLe behavior Interventions that eFfectively Improve (AMPLIFI) Cancer Survivor Health (1P01CA22997) is aimed at testing three distinct lifestyle interventions among 652 older, inactive, overweight or obese cancer survivors, a large proportion of whom will be minority and rural. The interventions include: 1) a 6-month dietary intervention aimed at improving diet quality and weight loss, as well as preserving lean body mass; 2) a 6-month intervention that is aimed at promoting aerobic physical activity; and 3) a 12-month diet and exercise intervention that combines both diet and exercise simultaneously (and effects will be evaluated against the combination of interventions 1 and 2 in sequence). Visiting nurses will assess physical function and perform phlebotomy at home health assessments scheduled at baseline and every six months; participants also will complete surveys that assess diet, physical activity and overall quality of life. We propose to measure the effects of these interventions on muscle mass using the novel D3-creatine (D3Cr) dilution method. We have demonstrated that this non- invasive method can be implemented in a large cohort study (MrOS) and that D3Cr muscle mass is strongly associated with functional capacity and risk of disability and that age- associated decreases in muscle mass are associated with slower gait speed and decreased strength. These associations were not observed using DXA derived lean mass. Subjects will ingest a 60 mg capsule of D3Cr and produce a fasting urine sample 48 – 96 hours later for the assessment of D3-Creatinine enrichment to determine creatine pool size and, because 98% of total body creatine is found in muscle, muscle mass. For the first time, the relationship between changes in muscle mass resulting from exercise and weight loss and functional capacity and physical activity will be assessed in this at-risk population of older cancer survivors.

我们建议在一个已经资助的项目中增加肌肉质量的测量