Imaging Cannabinoid Receptors Using Positron Emission Tomography (PET) Scanning
SchizophreniaCannabis Dependence5 moreThe aim of the present study is to assess the availability of cannabinoid receptors (CB1R) in the human brain. CB1R are present in everyone's brain, regardless of whether or not someone has used cannabis. The investigators will image brain cannabinoid receptors using Positron Emission Tomography (PET) imaging and the radioligand OMAR, in healthy individuals and several conditions including 1) cannabis use disorders, 2) psychotic disorders, 3) prodrome of psychotic illness and 4) individuals with a family history of alcoholism, 5) Post-Traumatic Stress Disorder 6) Opioid Use Disorder using the PET imaging agent or radiotracer, [11C]OMAR. This will allow us to characterize the number and distribution of CB1R in these conditions. It is likely that the list of conditions will be expanded after the collection of pilot data and as new data on cannabinoids receptor function and psychiatric disorders becomes available. Those in the cannabis us disorder arm of the study will have a PET scan on at least three occasions: once while smoking as usual, once after 48-hours of abstinence from cannabis, and a final time after 4 weeks of abstinence. Additional scans may be conducted within the 4 weeks and the last scan may be conducted well beyond 4 weeks. Similarly, while most schizophrenia patients may get scanned just once, a subgroup of patients may get scanned more than once. For example to tease out the effects of medications, unmedicated patients may get scanned while unmedicated and again after treatment with antipsychotic medications. Similarly prodromes may get scanned while in the prodromal stage off medications, on medications and after conversion to schizophrenia.
Context Sensitivity in Emotion Regulation in Post-Traumatic Stress Disorder
Complex Post-Traumatic Stress DisorderThis study will examine context sensitivity, composed of two sequential elements: (a) accurate classification of changing affective contextual demands, followed by (b) flexible selection of regulatory strategies that matches changing contextual demands, among complex PTSD vs. Healthy controls.
Department of Defense PTSD Adaptive Platform Trial Intervention A - Fluoxetine
Post Traumatic Stress DisorderThis is a Phase 2 randomized, double-blinded, placebo-controlled study that will evaluate multiple potential pharmacotherapeutic interventions for PTSD utilizing an adaptive platform trial design. Intervention A - Fluoxetine will assess the safety and efficacy of fluoxetine in participants with PTSD. Please see NCT05422612 for information on the S-21-02 Master Protocol.
Department of Defense PTSD Adaptive Platform Trial - Intervention B - Vilazodone
Post Traumatic Stress DisorderThis is a Phase 2 randomized, double-blinded, placebo-controlled study that will evaluate multiple potential pharmacotherapeutic interventions for PTSD utilizing an adaptive platform trial design. Intervention B - Vilazodone will assess the safety and efficacy of vilzodone in participants with PTSD. Please see NCT05422612 for information on the S-21-02 Master Protocol.
Brief-intensive CBT Versus Once-weekly CBT in Anxiety-related Disorders
Anxiety DisordersObsessive-Compulsive Disorder2 moreThe goal of this clinical trial is to compare brief-intensive cognitive-behaviour therapy (CBT) with regular weekly CBT in people with anxiety-related disorders. The main question to answer is: will brief-intensive CBT improve functioning (work, family, social) more and faster than does regular weekly CBT? Participants will be asked to follow CBT treatment (20 sessions of 45 minutes in both conditions), and participate in 7 measurements with a total duration of 5 hours over 1 year. Researchers will compare: Brief-intensive CBT: 16 sessions in 2 weeks + 4 follow-up sessions within 3 months Regular CBT with 20 weekly sessions in 6 months
MDMA for AUD/PTSD Comorbidity
Alcohol Use DisorderPost Traumatic Stress DisorderThe study investigators are conducting the first open label pilot trial of MDMA-assisted therapy (MDMA-AT) with a comorbid sample of military veterans with a comorbid diagnosis of Alcohol Use Disorder (AUD) and Post-Traumatic Stress Disorder (PTSD). This novel experimental treatment package consists of two once-monthly Experimental Sessions of therapy combined with a divided-dose of MDMA HCl, along with non-drug preparatory and integrative therapy. The Primary Outcome measure, the Timeline Follow-back (TLFB), will evaluate changes in alcohol use over time. Changes in PTSD symptoms will also be evaluated.
Activation of the Endocannabinoid System and Cognition
Post Traumatic Stress DisorderRecent data suggest that the cannabinoid-system is involved in stress regulation and posttraumatic stress disorder (PTSD). Low endocannabinoid signaling has been found in PTSD patients and might even present a precondition to develop PTSD after trauma. The aim of the current project is to investigate the impact of an activation of the cannabinoid system with an exogenous cannabinoid (dronabinol, i.e., delta-9-tetrahydrocannabinol) on fear conditioning.
Efficacy of Traumatic Memory Modification Using Memory Reconsolidation and Propranolol Among Adolescents...
Post Traumatic Stress DisorderThe aim of this study is to demonstrate the effectiveness of propranolol in blocking reconsolidation by reducing PTSD symptoms in the short and long term in adolescents with PTSD for more than 3 months.
Preliminary Effectiveness of Individual and Group MDMA-assisted Therapy for Israeli Veterans With...
Post Traumatic Stress DisorderMoral Injury1 moreThe overall objective of this study is to use standard clinical measures to explore the safety and preliminary effectiveness of open-label MDMA-assisted therapy with a flexible dose of methylenedioxymethamphetaminel, in participants with Post traumatic Stress Disorder and moral injury, in individual and group treatment settings. The overall safety objective is to assess the severity, incidence, and frequency of AEs, AEs of Special Interest (AESIs), and Serious Adverse Events (SAEs), concomitant medication use, suicidal ideation and behavior and vital signs .
MDMA-assisted Therapy Versus Cognitive Processing Therapy for Veterans With Severe Posttraumatic...
PTSDIn partnership with the Veterans Affairs (VA) Palo Alto Health Care System and Stanford University, this study aims to evaluate clinical outcomes, assess implementation feasibility, and health economics of MDMA-assisted therapy in the treatment of posttraumatic stress disorder (PTSD). Through a randomized comparison of MDMA-assisted therapy versus Cognitive Processing Therapy (CPT), a VA gold standard treatment for PTSD, the proposed study will set the stage for understanding the potential use and application of MDMA-assisted therapy for PTSD within the VA system.