View clinical trials related to Healthy.
Filter by:Human blood will be collected to serve as control in validating clinical studies studying the detection and levels of circulating tumor cells and microvesicles in cancer patients. Targeted population is cancer-free 18-60 year old men and women. Volunteer selection will rely upon a short health questionnaire. About 20 mL blood will be collected from volunteers up to 20 different timepoints. The Procedure involves minimal risk of harm (eg discomfort, bruising) to the volunteer.
Competitions such as marathon running and endurance cycling events are increasingly popular and represent an important motivation for sustaining training among leisure-time athletes. However, there is a concern that prolonged, high-intensity exercise may increase the risk of cardiovascular (CV) events. Following prolonged high-intensity exercise there is an increase in levels of circulating markers of myocardial damage such as Troponin I (TnI). The precise cause and clinical significance of this TnI increase is unknown. - The primary objective of this study was to determine the relationship between high-sensitive cardiac troponin I (hs-cTnI) levels and coronary artery disease and cardiovascular outcomes in 1000 presumably healthy leisure sport athletes that participated in a 91 km long, high intensity endurance cycling competition. - The secondary objective was to assess the relationship between other CV risk factors, fitness level and outcomes following high intensity endurance cycling competition in the same population.
Computer simulations are being developed to predict air flow abnormalities in the airways of patients with lung disease. The purpose of this study is to obtain actual gas flow measurements in the lungs of healthy patients and patients with lung disease and use these measurements to validate the computer models.
Glycemic index concept is widely used to determine impact of a food to blood glucose. Although the previous studies showed that glycemic index did not seem to be related with subject-specific factors, currently several studies found conflicting results on the relationship of subjects' characteristics and glycemic index values. This study aims to determine whether body composition parameters, as subject-specific factor, correlate with glycemic index values.
Numerous studies have investigated the effect of caffeine on athletic performance, but the findings have not been consistent. This is due, in part, to the differences in response that has been observed both within and between studies. Previous research in our lab has shown that genetic variations affecting caffeine metabolism modify the association between caffeine and heart disease. We hypothesize that the inconsistencies among studies relating caffeine and athletic performance may be due to genetic differences in caffeine metabolism or response. Male athletes will take part in an intervention of caffeine versus placebo, using a randomized double-blinded placebo-controlled design, which will test various exercise protocols (power, strength, anaerobic capacity, endurance) that are associated with performance across multiple sports. We will conduct a genome-wide association study, which is an approach that involves scanning for markers across the genomes of our study participants together, not individuals, to find genetic variations associated with a particular trait such as VO2 max, lactate clearance efficiency, muscle fiber type and changes in exercise performance following caffeine. We will also examine known genetic variations that are associated with caffeine metabolism and response, to determine if these genes also affect response to exercise after ingesting caffeine. Subjects will be paid $50.
The STAREE study will examine whether treatment with statin (atorvastatin 40mg) compared with placebo will prolong disability free survival and reduce major cardiovascular events amongst healthy elderly people (≥70 years).
Cardiovascular complications of NSAIDs, selective for inhibition of COX-2, stimulated interest in microsomal prostaglandin E synthase-1 (mPGES-1) as an alternative drug target. Global deletion of mPGES-1 in mice suppresses PGE2 and augments PGI2 by PGH2 substrate rediversion. Unlike COX-2 inhibition or gene deletion, mPGES-1 deletion does not cause a predisposition to thrombogenesis and hypertension. However, cell-specific deletion of mPGES-1 reveals that the predominant substrate rediversion product amongst the prostaglandins varies by cell type, complicating drug development. We have developed an ultra performance liquid chromatography/ tandem mass spectrometry (UPLC-MS/MS) technique that allows the quantification of a wide range of lipids beyond the prostaglandin pathway (leukotrienes, anandamide and the 2-arachidonylglycerol cascades). This study is designed to examine different pathway interventions from the arachidonic acid cascade by anti-inflammatory compounds (with a focus on mPGES-1 inhibition) in whole human blood in vitro (Part A) and ex vivo (Part B). In Part A, whole human blood will be donated by healthy volunteers and treated with screening compounds in vitro (outside of the body). Experiments will be performed to measure an array of lipids in plasma and serum from pre-stimulated whole blood treated with a single or a combination of the test compounds. This study may reveal pathways previously unknown to be affected by the existing anti-inflammatory drugs and drug candidates, and will possibly suggest new indications and/or side effects.
Magnetic resonance spectroscopy (MRS) allows non-invasive measurement of the concentration of up to 18 metabolites in the brain ("neurochemical profile"). The objective of this proposal is to develop new methods for high-field brain MRS (3 to 7 Tesla). Our main hypothesis is that higher magnetic fields lead to improved spatial and temporal resolution and improved quantification precision. Aims 1. To obtain improved "neurochemical profiles" in the brain using single voxel proton MRS at very high field (3 Tesla to 7 Tesla). 2. To develop new methods for proton magnetic resonance spectroscopic imaging (MRSI) to obtain metabolic maps at very high field (3 Tesla to 7 Tesla). Since this project is focused on technical development, only healthy volunteers will be recruited (no patients).
The purpose of this study is to test the safety and immunogenicity of MTBVAC as a potential substitute for BCG vaccination.BCG vaccination has indeed demonstrated its major limitation in inducing protection against tuberculosis (TB). Novel vaccines are essential to fight against the current world epidemics in tuberculosis and resistance to anti-TB drugs.
Neuromuscular electrical stimulation (NMES) has emerged as a suitable tool for restoring, maintaining and/or enhancing muscular performance. From a practical point of view, NMES can elicit contractions either by direct activation of motor axons (i.e. peripheral mechanism) or by the recruitment of motoneurons in the spinal cord through the depolarization of sensory axons (central mechanism). It is noteworthy that NMES parameters widely affect the balance between transmission along these two pathways. Conventional NMES is usually delivered using short pulse duration (0.05-0.4 ms), low stimulation frequency (15-40 Hz) and high stimulus intensities so that the large antidromic volley in motor axons ensures that the evoked contraction will be driven largely by the direct depolarization of motor axons beneath the stimulation site with no or little involvement of central nervous system. On the contrary, when NMES is delivered using wide pulse widths (1 ms) and high frequency (up to 100 Hz) (WP-HF NMES), a portion of the evoked contraction arises from a central mechanism and the corresponding force (recently referred to as "extra force") is significantly (three times) larger than the conventional NMES-induced force. This extra force is supposed to represent the central contribution from the recruitment of spinal motoneurons by the evoked afferent volley given that no additional force was observed during a complete anesthetic block of the nerve proximal to the stimulation site. Despite the obvious differences in terms of activation of the neuromuscular system between conventional and WP-HF NMES, the functional, metabolic and cortical responses associated to both protocols remain to be determined