View clinical trials related to Healthy Volunteers.
Filter by:The main purpose of this study is to investigate the effect of SRT2104 upon energy production in muscle (specifically the maximum amount of energy produced with muscle contraction), how much sugar and fat are stored in the muscle, and the size of the muscle after receiving 2.0 g of SRT2104 or placebo given in capsule form once a day for 28 days including a 14 day knee and lower leg immobilisation period during the final 14 days of dosing. Imaging methods, muscle biopsies and exercise tests will be used in the study to see whether the following measurements change after taking SRT2104 for 28 days, including an immobilised knee and lower leg for the final 14 days of dosing. i) energy reaching the muscles ii) muscle strength iii) changes in the structure of the muscle This study will also investigate the pharmacokinetics, safety and tolerability of 2.0 g of SRT2104 administered orally once daily for 28 consecutive days. The investigation of pharmacokinetics of SRT2104 allows us to gather information regarding: i) how long it takes for the drug to be absorbed and detected in the blood ii) how much we can detect iii) how long we can detect it for iv) how often we need to give the drug to maintain a steady amount in the blood. SRT2104 will be given to healthy subjects aged between 18 and 40 years old. Subjects will participate in this single centre study for approximately 79 days. The study consists of 11 outpatient clinic visits and 4 telephone calls (including a prescreen call to determine whether subjects are interested in participating).
This is a randomized, open-label, two-way cross-over drug-drug interaction Phase I trial. The objectives of this phase I trial are to investigate in healthy female subjects: - the effect of prucalopride on the absorption of ethinylestradiol and norethisterone acetate, the active constituents of several oral contraceptives, after the first dose of prucalopride. - the effect of multiple oral dosing of 2 mg prucalopride, for 6 days o.d. (steady state), on the pharmacokinetics of ethinylestradiol and norethisterone acetate. This trial will be conducted in healthy females of child bearing potential, i.e. females aged between 18 and 45 years (pre-menopausal).
Multiple center, double-blind, randomized, placebo-controlled study to see if it is safe to give ACHN-490 Injection for 5 consecutive days, to measure plasma pharmacokinetics, and to determine lung penetration of ACHN-490 (measured in ELF-epithelial lining fluid)after a single dose of ACHN-490 Injection in healthy volunteers.
The cytochrome P450 enzymes (CYP) are the major drug-metabolizing enzyme system in humans. A great inter- individual variability affects the activity of these enzymes, and consequently the plasma drug concentrations resulting in different pharmacodynamic effects and occurrence of effect sides. Environmental factors, diet, drugs or genetics are responsible for this variability. Genetic factors are very important since the majority of these enzymes are highly polymorphic. For example, over 80 CYP2D6 allelic variants have been discovered so far and are associated to the absence, a decrease, or an increase in enzyme activity. Most polymorphisms were detected by adverse reactions occurring in a group within the population after normal doses of drugs had been administrated. Those patients experiencing adverse reactions often had a reduced capability to metabolize certain drugs. In clinical therapy, this variability has important consequences including the lack of response to a treatment and/or adverse drug reactions. In order to reduce these potentially unwanted events possibly leading to sever adverse reactions or death, it might therefore be of decisive interest to be able to assess the activity of these enzymes at the individual level. Two approaches may be used to assess CYPs activities, genotype and phenotype. Genotype is based on DNA analysis and polymorphism detection. Phenotype consists of administration of "model" drug or probe drug metabolized by a specific CYP and a determination of a ratio between the drug and its metabolite in plasma or urine. The principal drawback of the phenotyping methods is the urine collection overnight or at least 8 hours after the administration of probe test. This procedure is very tedious and time consuming for the patient as well as for the medical staff. The test can be performed in plasma or blood 1-2 hours after probe administration. However, this procedure is invasive and needs an important volume of blood (6 ml). Recently, a novel approach has been developed for the quantitative determination of circulating drug concentrations using dried blood spots (DBS) on filter paper obtained with a simple finger prick. Due to the small blood volume required (about 10 µL) compared to conventional sampling, this minimally invasive method provides a patient-friendly alternative for blood collection in patient population where venous sampling is unethical or impossible (pediatrics). In addition, DBS sampling does not require the use of anticoagulant, plasma separation and decreases contact with infectious material. Furthermore, dried blood spots can be easily stored and shipped to analytical laboratories without using refrigerated devices. Thanks to the new developments in analytical techniques (mass spectrometry), which permit quantitative analysis from very small volume of blood. DBS sampling represents a powerful tool for the biomedical analyses, particularly in pharmacokinetic studies where several blood samples are needed and for phenotyping procedures.
The purpose is to show that 5 mg Form IV tablet of AG-013736 produces similar drug concentrations in plasma compared to 5 mg Form XLI tablet of AG-013736 after oral dosing under fed conditions.
Ertugliflozin (PF-04971729, MK-8835) is under development for the treatment of Type 2 Diabetes. The primary purpose of this trial is to evaluate the safety and tolerability, pharmacokinetics and pharmacodynamics, of multiple oral doses of ertugliflozin.
The purpose of this study is to compare the bioavailability of two oral formulations of Triazolam in healthy volunteers, in order to determine that they are bioequivalent.
The objective of the study is to compare the relative bioavailability and pharmacokinetics of solifenacin succinate suspension versus tablet.
Vaccines induce protective immunity against numerous infectious diseases. However, current vaccines have limited efficacy against challenging infections like tuberculosis, malaria and HIV. Protein vaccines are safe but, typically, they induce weak T cell immunity when administered alone. Therefore, special attention is being given to adjuvants, which are enhancers of immunity, that mature antigen presenting immunostimulatory dendritic cells (DCs). Our goal is to study in humans the mechanism whereby synthetic adjuvants, acting on defined pattern recognition receptors (PRR), enhance T and B cell immunity. In preclinical studies, the investigators' laboratory has found in mice that poly IC and its analog poly ICLC are superior adjuvants for T cell mediated immunity relative to other agonists for PRR. In this study the investigators propose to study the safety and the innate immune responses to poly ICLC in multiple blood cell types, including three different subsets of DCs when administered subcutaneously or intranasally to healthy volunteers. Poly ICLC is a stabilized double stranded RNA which has been extensively studied in humans with a favorable safety profile.
The purpose of this study is to determine the safety and toleration of single and multiple doses of PF-04531083. (To investigate the plasma and urinary pharmacokinetics of PF-04531083 and its metabolites, following single and multiple dose administration in healthy male and/or female subjects; and to determine whether PF-04531083 raises levels of enzymes involved in metabolism of other drugs following multiple dosing).