View clinical trials related to Sarcopenia.
Filter by:The quality of protein intake has an important role within the nutritional needs of people throughout their lives around the world, particularly in developing countries and in particular during pregnancy and early childhood. It is likely that adequate protein reduce by 40% the prevalence of stunting (low height for age) in children under five years, according to World Health Organization data. Uncertainty about the quality of the diet, specifically with reference to quality proteins has potential impacts on health, economy, agriculture, and food security of a nation. The amino acid digestibility estimates based on stool analysis do not represent the amount of absorbed amino acid. Ideally, the bioavailable amino acid should be measured by methods that assess the difference between consumed and absorbed amino acids. However, the uptake of amino acids is not readily non-invasively measured in healthy humans. The use of vegetable protein intrinsically labeled by stable isotopes offers a solution to this problem. The deuterated water (2H2O), with relatively low cost, is suitable for labeling plant proteins such as those of beans. The labeled amino acids are present in the test meal ingested and incorporated into the blood, representing a single measure of bioavailability. This study aims to develop and apply a new methodology, using stable isotopes, to evaluate the bioavailability of bean protein, a very important food in the Brazilian diet, according to cooking procedures, through the use of deuterium. The project will be divided into two parts: a human nutrition and an agriculture part, the latter by planting/harvesting deuterium-labeled Phaseolus vulgaris L. After two weeks of blooming, deuterium water will be added to the bean crop, which will be subsequently dried. Chemical analysis and assessment of incorporation of deuterium in the beans will be done. Concurrent with the cultivation of beans, there will be a protein absorption test with 15 healthy volunteers for validation of the methods. For comparison purposes, milk protein labeled with deuterium and C13 will be used. The volunteers will consume the test meals. Blood, urine and saliva samples will be collected at baseline (before food ingestion), and in different times after the meal. In the next phase of this research, labeled beans produced by the agriculture experiment will be used to measure the protein absorption of volunteers of different groups (older persons, and stunting and non-stunting children). The samples will analyzed by isotope-ratio mass spectrometry. This methodology may promote a better understanding of the absorption of proteins and amino acids using less invasive methods in different age groups and clinical conditions. This work will have an important impact for the general population as well as for agriculture and health-related professionals.
Deficits in skeletal muscle function exist during aging and muscular dystrophy, and suboptimal function has been related to factors such as atrophy, excessive inflammation and fibrosis. Sarcopenia is the age-related loss of skeletal muscle mass and function. It is now recognised as a major clinical problem for older people and research in the area is expanding exponentially. This interest stems from the fact that sarcopenia is both common and associated with serious health consequences in terms of frailty, disability, morbidity and mortality. The age-related loss of human skeletal muscle mass is due to a decrease in myofibre size and number with the loss of both fast and slow type myofibres, although the loss of fast myofibres tends to start earlier, at ∼70 years. Many factors influence the decrease in muscle mass. A significant contributor is an anabolic resistance of older skeletal muscle to protein nutrition as seen during immobilisation which can be ameliorated at least in part by resistance exercise and dietary supplementation. Other intensive areas of research are related to the loss of innervation and oxidative damage. Moreover, ineffective muscle regeneration underlies each condition and has been attributed to a deficit in myogenic potential of resident stem cells or satellite cells. It is now widely accepted that satellite cells, and generally adult stem cells, are normally quiescent and tend to reside in hypoxic areas of the tissue to preserve their undifferentiated state. To govern these processes, cells have developed a very complex machinery that is mainly regulated by a group of transcription factors known as hypoxia-inducible factors (HIFs). In particular, several observations support the idea that oxygen deprivation and HIF-1a may play a key role during ischemia to activate the regeneration process, which, after an initial hypoxic insult, needs to proceed under normoxia. On these bases, in this study we will investigate the role of HIF-1a in skeletal atrophy during aging.
Frailty, one of geriatric syndromes, is considered a major obstacle for recovery from physiological stress. Such stress is imposed on patients with cancer by virtue of the disease itself but even more so by the treatment. Moreover, malignancy and chemotherapy both cause accelerated loss of muscle mass, deconditioning, frailty and negative outcomes. Several studies showed that chemotherapy accelerates ageing. Muscle mass reserve was found to be a major predictor of outcomes in patients treated with chemotherapy. Recently, several studies suggest that active muscle strength training during chemotherapy may decrease side effects, improves the ability to deliver intended doses of treatment and may even affect oncological outcomes. In the proposed study we intend to assess the contribution of physical training to the well-being of chemotherapy treated older patients, assessed by molecular and physiological parameters. We intend to recruit lymphoma patients above age of 70 and prospectively and randomly assign them to the intervention group (strength, aerobic and balance training during the chemotherapy) and control group (standard care with no special emphasis on physical activity during the treatment). We will measure clinical outcomes such as treatment tolerance and effects as well as physiological outcomes (muscle strength and mass, elements activities of daily living) and laboratory markers of ageing such as DNA methylation, INK 4a expression, telomere length and serum levels of inteleukin 6, CRP among others. Our hypothesis is that physical training will improve patients' ability to complete the treatment with fewer side effects, will provide them with better daily functioning and better muscle strength/function. We also hypothesize that the ageing process, as shown by laboratory senescence markers, will be attenuated in the intervention group.
Sarcopenia (loss of muscle mass and function) can be observed at any age and results of multiple factors (age, activity, inflammatory factors, nutritional status...). It deeply impacts the physical performance and the basal metabolism, and induces cardiovascular disorders, dyslipidemia, and diabetes. Sarcopenia appears like an independent factor decreasing the quality of life, exacerbating the toxicity of chemotherapy and increasing mortality for gastrointestinal cancer. However, few studies have demonstrated his impact on postoperative course in digestive oncology. The search for sarcopenia, complementary nutritional status, is now a source of great interest with 62 ongoing projects in the United States. The first objective of this study is to evaluate the impact of preoperative sarcopenia on 30-days morbidity and mortality of patients operated on from poor prognosis gastrointestinal cancer (liver and pancreas). The second objective is to evaluate the impact of preoperative sarcopenia on the long term outcomes (12 months) on the same patients.
A randomized double blind placebo control trial study will be conducted in critically ill patients with vitamin D deficiency. Investigator aimed to study the effect of oral vitamin D3 supplementation, compare to placebo, on skeletal muscle mass and body composition.
The cardiorespiratory training can increase muscle strength ventilatory.