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Discover 23,284 clinical trials near Maryland. Find research studies in your area.
Showing 14081-14100 of 23,284 trials
NCT00428272
Background * HGS-ETR2 is a monoclonal antibody, produced in the laboratory from human genes. * HGS-ETR2 targets a protein called the TRAIL receptor that is located on the surface of some tumor cells. When the TRAIL receptor is activated, it can cause the tumor cell to self-destruct. Objectives: * To determine the highest dose of HGS-ETR2 that can be given safely in children and young adults with cancer. * To study the pharmacology (how the body handles the drug) of HGS-ETR2 by measuring the amount of drug in the bloodstream over time before and after a dose is given to the patient. * To determine if HGS-ETR2 can stop or slow tumor growth. * To determine whether proteins in tumor tissue before treatment can predict whether the tumor will respond to HGS-ETR2 therapy. Eligibility: -Patients 1 to 21 years of age with solid cancers that do not respond to standard therapy. Design: * HGS-ETR2 is given through a vein (intravenously, IV) once every 14 days. Each treatment cycle is 28 days long and consists of two doses of HGS-ETR2. * The dose of HGS-ETR2 is increased in successive small groups of patients until the maximum tolerated dose (highest dose with acceptable side effects) is determined. * During the treatment period, patients have a physical examination at least once a week, and routine blood tests at least twice a week. These tests are done less frequently in later treatment cycles. * Additional blood samples are drawn for immunology and pharmacology studies. * Tests to monitor the size of the tumor (X-rays, CT scans, MRI, PET scans) are done periodically throughout the treatment period. * Patients may continue to receive HGS-ETR2 until unacceptable side effects develop or the tumor grows.
NCT00422071
This study will use transcranial magnetic stimulation (TMS) to determine whether the activity in the brain when someone wins something affects the part of the brain that controls movement. Studies have shown that the brain releases signals to mark rewards for certain behavior, like the activity the brain generates when an animal receives food or drink after performing a certain action. This study will look for a way to detect this kind of signal in humans. Healthy volunteers between 18 and 60 years of age are eligible for this study. Participants undergo TMS during two experiments slot machine stimulation and key sequence (see below). For TMS, a wire coil is held on the subject s scalp. A brief electrical current is passed through the coil, creating a magnetic pulse that stimulates the brain. The stimulation may cause twitching in muscles of the face, arm or leg, and there may be a pulling sensation on the skin under the coil. The effect of TMS on the muscles is detected with small metal disk electrodes taped onto the skin of the arms or legs. The stimulation strength needed to activate the hand muscles is determined at the beginning of each experiment. To do this, the subject sits with his or her arms and hand relaxed. Magnetic pulses of varying strengths are applied in order to find the right strength. Also, a series of 45 pairs of magnetic pulses is administered so close to each other that they produce only one movement. Measurements of the movements generated serve as a baseline for comparison with movements generated during the experiments. Slot Machine Simulation Subjects play a computer game similar to a slot machine. They press a button to start the game and watch as three barrels of the machine spin into place. Subjects can win $0.25, $1or $5 if all three barrels match when they stop spinning. If all three barrels do not match, subjects do not win any money, except in rare instances, when they are awarded money even when all three barrels do not match. In one trial in this experiment, subjects receive transcranial magnetic stimulation after they see the second barrel stop spinning. In another trial, they receive the stimulation after the third barrel stops spinning. Key Sequence Subjects see a letter on a computer screen and press a combination of the three keyboard keys G, H, and J. If they press the keys in the right order and under the time limit, they win $1. At some point, the letter displayed changes, and the subjects must guess a new combination to earn money. Each of the letters corresponds to its own combination of key presses. A few moments after the subjects see whether they pressed the keys in the right order, they receive TMS.