View clinical trials related to Healthy Volunteers.
Filter by:This study is intended to evaluate: 1. Any changes in the gut microbiome from baseline compared to end of study in both healthy (HIV-negative) subjects and HIV+ patients with or without chronic diarrhea, following one month of treatment with crofelemer (Mytesi), delayed release 125 mg tablets twice daily (BID) following one month of treatment. 2. The safety and tolerability of crofelemer, (Mytesi) delayed release 125 mg tablets BID in healthy (HIV-negative) volunteers and HIV+ patients following one month of treatment.
Background: Androgens are used for doping purpose because they can increase muscle mass and strength. These drugs are included in the list of prohibited substances of the World Anti-Doping Agency (WADA). The prohibition of its use has given rise to a great variety of strategies of indirect androgenic doping, whose purpose is to produce a sustained increase in endogenous testosterone. Triptorelin acetate is a gonadotropin-releasing hormone (GnRH) agonist. Daily subcutaneous administration of triptorelin causes an initial increase in circulating levels of luteinizing hormone (LH) and follicle stimulating hormone (FSH), producing a transient increase in testosterone levels. However, prolonged daily administration results in a paradoxical decrease in LH and FSH levels due to desensitization of GnRH receptors, decreasing testosterone production to levels similar to castration. Thus, the initial flare reaction produced by triptorelin administration could be used by athletes as an indirect androgenic doping method to stimulate the synthesis of endogenous LH and testosterone with the aim of improving physical performance. Hypothesis: Subcutaneous administration of triptorelin in healthy subjects allows obtaining positive urine samples that will be used to identify analytical strategies for doping detection. Triptorelin concentrations and its metabolites can be measured in urine. Objectives: Primary objective: To measure triptorelin concentrations in urine samples for anti-doping control. Secondary objectives: To identify triptorelin metabolites in urine. To explore the time window in which the drug or its metabolites can be detected in urine after administration. Methods: Phase I, open, non-randomized, uncontrolled clinical trial, with a treatment condition (triptorelin) administered subcutaneously in a single dose to 2 subjects.
This study in healthy men and women looks at the injection site experience of semaglutide and dulaglutide given subcutaneously (s.c., under the skin). Participants will receive 1 dose of semaglutide 0.25 mg and 1 dose of dulaglutide 0.75 mg on the same day. The 2 injections will be given at least 30 minutes apart, one in each side of the stomach. Participants will be in the clinic research center for 1 day. A follow-up phone call will take place between 4 and 5 weeks after the injections were given.
The aim of this study is to investigate the effects of gut microbial metabolism of flaxseed lignans on cardiovascular health. Enterolactone is the main gut microbial metabolite of lignans. The study population will be stratified in low and high enterolactone producers and will investigate whether high producers will have greater benefits than low producers, and whether low producers may become high producers after daily consumption of lignans over 8 weeks. The investigators will evaluate changes in endothelial function, blood pressure, arterial stiffness, insulin resistance, lipid profile and gut microbiome composition after 8 weeks daily consumption of flaxseed lignans.
The brain is composed of a set of areas specialized in specific computations whose outputs need to be transferred to other specialized areas for cognition to emerge. To account for context-dependent behaviors, the information must be flexibly routed through the fixed anatomy of the brain. The aim of this project is to test a general framework for this flexible communication between brain areas based on nested oscillations. The general idea is that internally-driven slow oscillations (<20Hertz) either set-up or prevent the communication between brain areas. Stimulus-driven gamma oscillations (>30Hertz), nested in the slow oscillations, can then be directed to task-relevant areas of the network. This multimodal, multi-scale approach uses magnetoencephalography using a 3-Dimensional (3D) printed individual head-cast system and transcranial stimulation in experiments manipulating visual processing, attention and memory to test core predictions of this framework. The theoretical approach and the methodological development used in this basic science study will provide the basis for future fundamental and clinical research.
One of the major complications of posterior fossa surgery is Posterior Fossa Syndrome (PFS). This syndrome is due to a possible complication of surgical excision of a tumor of the cerebellum (4th ventricle) and is characterized by transient postoperative mutism, dysarthria, behavioral, and affective disorders, as well as motor disorders. PFS is thought to be related to axonal lesions. The long-term consequences on the cognitive and psychosocial sphere of PFS have been widely documented. On the other hand, the literature concerning the consequences of this syndrome on language is much restricted. Beyond the language, the role of cerebellum would be central in cognition, some authors even comparing it to a great "conductor" who would underlie the learning of most motor and cognitive automatisms.
The objective of this study is to examine the effect of a single IV dose of ketamine (0.5 mg/kg) on laboratory-induced stress in healthy participants.
The purpose of this study is to investigate the safety, pharmacokinetics, and pharmacodynamics of repeated dosing of TS-142 when administered once daily to healthy Japanese non-elderly participants.
The purpose of this study is to investigate the safety and pharmacokinetics of single dosing of TS-142 to healthy Japanese non-elderly participants in fasting and after meal condition.
Knowledge about the correlations between the composition of the gut microbiome and a wide range of diseases has substantially increased in recent years. Nonetheless, there is no reference set of information about the microbiome in Poland. The development of such a reference will allow polish scientists conducting research in the field of interaction between gut flora components and such characteristics as lifestyle, certain diseases or patient's responses for treatment. Following the example of such countries as the United States, investigators propose to build a unique set of scientific processed information describing the variability of the polish population microbiome (Polish Microbiome Map). The investigators will provide a reliable dataset that will characterize the gut microbiomes and their diversity in the polish population. Additionally, thanks to the creation of the standard protocol for microbiome data collection the research conducted by the MMP users will be comparable with the information deposited in MMP.