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Discover 17,868 clinical trials near Massachusetts. Find research studies in your area.
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NCT01508026
To evaluate the efficacy and safety of fixed-dose combination of nebivolol and valsartan compared to monotherapy and placebo in patients with stage 1 and stage 2 hypertension.
NCT01659814
The overall aim of this study is to utilize an integrative research model in order to dynamically assess reward-related dopamine (DA) transmission in major depressive disorder (MDD) and test the role of dysfunctional DA release in depression and anhedonia. The first arm of this line of research (PET scan) aims to investigate phasic DA release in MDD during incentive motivation. The investigators will utilize an established molecular imaging technique to measure striatal DA release dynamically during performance of testing and control versions of a monetary incentive delay task, which involves anticipation and receipt of monetary rewards. In doing so, this experiment will link together independent lines of research that have associated depression with decreased hedonic responsiveness, impaired reinforcement learning and dysfunctional DA transmission. We hypothesize that, relative to matched controls, unmedicated MDD subjects will show reduced reward-related ligand (11C-raclopride) displacement. Reduced ligand displacement will be interpreted as indicating reduced task-induced release of endogenous striatal DA in response to reward-predicting cues and unpredictable reward in MDD subjects. In the second arm of this research (EEG recording), the investigators aim to probe the spatio-temporal dynamics of brain mechanisms underlying positive and negative reinforcement learning in MDD and their relations to phasic DA. Participants will perform the probabilistic stimulus selection task (PSST) while event-related potentials (ERPs) are collected. The investigators expect that, relative to matched controls, unmedicated MDD subjects will show reduced positive reinforcement learning, potentiated negative reinforcement learning, and larger (i.e., more negative) feedback-related negativity (FRN) in response to positive reinforcement (indicative of reduced DA transmission). Moreover, the investigators hypothesize that a more negative FRN in response to positive reinforcement will be associated with decreased striatal raclopride displacement (i.e., lower release of endogenous DA) as measured by PET in the first part of the study. This experiment will investigate the effects of blunted DA transmission on behavioral and ERP markers of both positive and negative reinforcement learning.
NCT00183755
This study will examine brain responses associated with reinforcement and reward tasks in individuals with major depressive disorder (MDD).
NCT00473746
The purpose of this study is to evaluate the safety, pharmacokinetics, pharmacodynamics, and anti-tumor activities of abiraterone acetate (also referred to as CB7630) in patients with hormone refractory prostate cancer (HRPC).
NCT01398761
The purpose of this grant is to fund the research necessary to fully understand the impact of this sign-out tool on clinician workflow, quality of sign-out, and continuity of care. This information will inform exactly how Partners will move ahead with tools to improve handoffs in care (i.e., whether the prototype will be adapted further, adopted Partners wide, or abandoned in favor of other solutions). The investigators hypothesize that a web-based handoff tool improves provider satisfaction, the quality of written sign-outs, and measures of continuity of care compared with current handoff tools.
NCT00119730
* The purpose of this study is to find out whether combining a short course of chemotherapy (Fludarabine, Mitoxantrone and Rituximab) followed by Zevalin will be effective in treating relapsed mantle cell lymphoma. * The secondary purposes of the study are to determine the safety and to evaluate whether there is additional benefit from Zevalin therapy following the chemotherapy.
NCT00113295
The purpose of this study is to examine the safety and efficacy of quetiapine for generalized anxiety disorder patients who remain symptomatic despite treatment with paroxetine CR.
NCT00381303
The purpose of this study is to evaluate any differences in the effectiveness, safety, and tolerability of PREZISTA (darunavir; DRV) 600 mg, administered with ritonavir (RTV) 100 mg twice a day on virologic response (defined as a viral load (VL) of \< 50 copies/mL) over a 48-week treatment period in HIV-positive women and men. Additional antiretroviral (ARV) agents will also be administered and will be chosen by the Investigator based on resistance testing and prior treatment history (referred to as the Optimized Background Regimen (OBR)).
NCT01188772
Genotype 1: Participants with genotype 1 hepatitis C (HCV) infection were randomized to receive sofosbuvir (GS-7977; PSI-7977) 200 mg or 400 mg, or matching placebo, plus pegylated interferon alfa 2a (PEG) and ribavirin (RBV) for 12 weeks, followed by PEG+RBV for an up to an additional 36 weeks. Randomization was stratified by IL28B status (CC, CT, TT) and HCV RNA level (\< 800,000 IU/ml or ≥ 800,000 IU/ml) at baseline. Participants were randomized in a 2:2:1 manner; those who achieved an extended rapid virologic response (eRVR) (HCV RNA \< lower limit of detection \[15 IU/mL\] from Weeks 4 through 12) received an additional 12 weeks of PEG+RBV. Subjects not achieving eRVR received an additional 36 weeks of PEG+RBV. Genotype 2 and 3: Participants with genotype 2 or 3 hepatitis C (HCV) received sofosbuvir 400 mg plus PEG+RBV for 12 weeks.
NCT01215955
Evidence regarding optimal methods of insulin dose adjustment is lacking in the literature. The purpose of this study is to evaluate the efficacy and safety of two approaches to escalate prandial insulin therapy in participants with type 2 diabetes mellitus not achieving adequate glycemic control on basal insulin.
NCT00086684
The purpose of this study is to evaluate the safety and effectiveness of pentosan polysulfate sodium 100 mg once a day, pentosan polysulfate sodium 100 mg three times a day, and placebo for 24 weeks for the relief of bladder pain or discomfort associated with interstitial cystitis.
NCT01073163
The primary objective of this study is to assess the effect of treatment with bendamustine on cardiac repolarization as reflected by the rate-corrected QT interval by the Fridericia method (QTcF).
NCT01073228
This study is being conducted to determine the safety and effect on cognitive function of the investigational medication, EVP-6124, in individuals with mild to moderate probable Alzheimer's disease.
NCT00210639
The purpose of this study is to assess the long-term safety of levofloxacin administered to children as therapy for acute bacterial infection.
NCT00968851
This study is being conducted to determine the safety and effect on cognitive function of two different doses of an investigational medication, EVP-6124, in individuals with schizophrenia who are on chronic stable atypical anti-psychotic therapy. In addition, behavioral and psychotic symptoms will be evaluated.
NCT01281839
The purpose of this study is to investigate the effectiveness and safety of TMC435 compared with placebo in patients who are infected with genotype 1 hepatitis C virus who relapsed after previous interferon-based therapy. Patients will also receive peginterferon alfa-2a and ribavirin as part of their treatment.
NCT01613326
This study compared the efficacy and safety of NVA237 with tiotropium in patients with moderate to severe COPD. Tiotropium belongs to the same drug class as NVA237.
NCT02118207
SCUBA diving frequently involves repetitive exposures over multiple days. The goal of this study was to see how exercise impacts microparticles (MPs), endothelial function, and venous gas emboli (VGE) over a series of dives. 16 divers in 2 groups each completed 6 dives. One group completed 3 control dives followed by 5 days rest then 3 dives preceded by exercise. The other group completed the opposite protocol. Flow-mediated dilation (FMD) data and blood for MP analysis was collected before and after each dive. VGE were monitored via transthoracic echocardiography 30, 60, and 90 min after surfacing. Exercise before diving consisted of 60 min running outdoors including 8x4 min intervals at 90% VO2max effort.
NCT01000311
This Phase 3 study is designed to demonstrate the safety and immunogenicity of MenACWY and non-interference of concomitant routine vaccines by MenACWY in an infant age group.
NCT00449644
The objective of this study is to demonstrate that the antibacterial activity of TMC207 is better than placebo when added to a standardized Background Regimen (BR) for treatment of multi-drug resistant TB. Also safety and tolerability will be evaluated.
