[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"trial:NCT05472818":3,"trial-entities:NCT05472818":87,"trial-summary:NCT05472818":90},{"id":4,"nct_id":4,"org_study_id":5,"brief_title":6,"official_title":6,"overall_status":7,"completion_date":8,"status_verified_date":9,"last_update_date":10,"start_date":11,"sponsor_name":12,"lead_sponsor_class":13,"has_dmc":14,"brief_summary":15,"detailed_description":16,"conditions":17,"keywords":20,"study_type":26,"primary_purpose":27,"phases":28,"enrollment_info":30,"interventions":33,"primary_outcomes":40,"secondary_outcomes":45,"sex":54,"minimum_age":55,"maximum_age":56,"healthy_volunteers":57,"eligibility_criteria":58,"std_ages":62,"locations":65,"central_contacts":75,"overall_officials":81,"references":85,"see_also_links":86},"NCT05472818","2000032181","SV2A Density Cannabis Use Disorder","RECRUITING","2032-05","2026-03","2026-03-12","2022-04-12","Yale University","OTHER",false,"The main purpose of this study is to determine whether hippocampal synaptic vesicle density estimated by hippocampal \\[11C\\]APP-311\u002F\\[11C\\]UCB-J binding in individuals diagnosed with cannabis use disorder (CUDs) improves with at least 4 weeks of confirmed abstinence from cannabis, in comparison to healthy controls (HCs). Furthermore, any change in synaptic vesicle density will be placed in functional context by measuring verbal memory, which is sensitive to hippocampal function, before and after at least 4 weeks of confirmed abstinence. Finally, the relationship between hippocampal \\[11C\\]UCB-J binding in CUDs with measures of cannabis exposure (e.g., age of initiation, cumulative lifetime dose) will be explored.",null,[18,19],"Cannabis Use Disorder","Healthy",[21,22,23,24,25],"Cannabis Use Disorder (CUD)","Healthy subjects","synaptic vesicle density","[11C]APP311","UCB-J","INTERVENTIONAL","BASIC_SCIENCE",[29],"EARLY_PHASE1",{"count":31,"type":32},51,"ESTIMATED",[34],{"type":35,"name":24,"description":36,"armGroupLabels":37},"DRUG","For each \\[11C\\]APP311 (UCB-J) PET scan, up to 20 mCi of \\[11C\\]APP311 (UCB-J) will be administered by infusion pump. All participants will receive at least two \\[11C\\]APP311 (UCB-J) PET scans approx. 4 weeks days apart. Approximately 8 CUD participants will be asked to return for a third \\[11C\\]APP311 (UCB-J) PET scan after an additional 4 weeks following their second scan.",[38,39],"CUD Group","Healthy Controls",[41],{"measure":42,"description":43,"timeFrame":44},"Hippocampal SV2A synaptic density","Hippocampal SV2A synaptic density will be measured using \\[11C\\]APP311 (UCB-J).","All participants will receive at least two [11C]APP311 (UCB-J) PET scans approx. 4 weeks days apart.",[46,50],{"measure":47,"description":48,"timeFrame":49},"Hippocampal binding and Hippocampal Verbal Memory Task","To determine the relationship between hippocampal \\[11C\\]APP311 (UCB-J) binding and performance on the hippocampal verbal memory task (Auditory Verbal Learning Task \\[AVLT\\]), a cognitive task that measures total immediate recall, before and after 4 weeks of confirmed cannabis abstinence.","The Auditory Verbal Learning Task (AVLT) will be administered before and after the 4 week abstinence period.",{"measure":51,"description":52,"timeFrame":53},"Hippocampal binding and Groton Maze Learning in CUDs","To determine the relationship between hippocampal \\[11C\\]APP311 (UCB-J) binding and performance on the Groton Maze Learning task, a cognitive task that measures total number of errors, in CUDs before and after 4 weeks of confirmed cannabis abstinence.","The Groton Maze Learning Task will be administered before and after the 4 week abstinence period.","ALL","18 Years","75 Years",true,{"inclusion":59,"exclusion":60,"raw_text":61},[],[],"CUD Participants Inclusion Criteria:\n\n1. Able to provide informed consent\n2. Male and female 18-75 years old\n3. Daily cannabis use\n4. Positive urine screen for cannabinoids and negative for all other drugs on\n5. Diagnosis of DSM-5 cannabis use disorder (≥ moderate, i.e., ≥ 4 \\[of 11\\] symptoms).\n6. Must express a willingness at screening to set a date to attempt to quit using cannabis.\n7. Physically healthy i.e., no clinically unstable medical conditions.\n8. For women of childbearing potential (WOCBP) and men, willingness to practice birth control and to inform study staff immediately if either they (for women) or their partner (for men) becomes pregnant.\n9. Additional criteria not disclosed here in order to minimize the risk of ineligible subjects enrolling in the study.\n\nCUD Participants Exclusion Criteria:\n\n1. Laboratory tests with clinically significant abnormalities or positive urine toxicology screen with exception of cannabinoids.\n2. Women with a positive pregnancy test or women who are lactating.\n3. Have implanted or embedded metal objects or fragments in the head or body that would present a risk during the MRI scanning procedure, or have worked with ferrous metals either as a vocation or hobby (for example, as a sheet metal worker, welder, or machinist) in such a way that might have led to unknown, indwelling metal fragments that could cause injury if they moved in response to placement in the magnetic field\n4. Have had exposure to ionizing radiation that in combination with the study tracer would result in a cumulative exposure that exceeds recommended exposure limits.\n5. History of a bleeding disorder or are currently taking anticoagulants (such as Coumadin, Heparin, Pradaxa, Xarelto) Subjects who have donated blood within 8 weeks of the present study\n6. Medications that could alter synaptic density and, therefore, confound the interpretation of study data.\n7. Additional criteria not disclosed here in order to minimize the risk of ineligible subjects enrolling in the study.\n\nHealthy Controls Inclusion Criteria:\n\n1. Willing and able to give voluntary written informed consent\n2. Male and Female subjects, age 18 to 75 years, inclusive\n3. BMI within 19 to 35 kg\u002Fm2, inclusive\n4. Must be in good health as determined by medical history, physical examination, ECG, serum\u002Furine biochemistry, hematology, and serology tests.\n5. Negative urine drug screen\n6. If female, not pregnant or breastfeeding\n7. If female of childbearing potential, must agree to use an acceptable method of birth control, as determined by the principal investigator, for the duration of the study and up to one month after completion of PET scans.\n8. Able to read and write, able to communicate effectively with the investigator, and comply with all study requirements, restrictions, and directions of the clinic staff.\n9. Have arterial access sufficient to allow blood sampling as per the protocol.\n\nHealthy Controls Exclusion Criteria:\n\n1. History or presence of clinically significant and unstable respiratory, GI, renal, hepatic, pancreatic, hematological, neurological (including history of seizure), cardiovascular, psychiatric (including known addictive disorders), musculoskeletal, genitourinary, immunological, or dermatological disorders, including all cancers.\n2. Abnormal clinically significant laboratory or physical findings during screening\n3. History of a bleeding disorder or are currently taking anticoagulants (such as Coumadin, Heparin, Pradaxa, Xarelto)\n4. A condition that, in the opinion of the investigator, would prevent compliance with the study protocol.\n5. Medications that could alter synaptic density and, therefore, confound the interpretation of study data.\n6. MRI incompatible implants and other contraindications for MRI, such as pace-maker, artificial joints, non-removable body piercings, metal fragments in head and\u002For body, or history working with ferrous metals either as a vocation or hobby in such a way that might have led to unknown, indwelling metal fragments that could cause injury during MRI etc.\n7. Subjects who suffer from claustrophobia.\n8. Participation in other research studies involving ionizing radiation within one year of the PET scans that would cause the subject to exceed the yearly dose limits for healthy volunteers\n9. Additional criteria not disclosed here in order to minimize the risk of ineligible subjects enrolling in the study.",[63,64],"ADULT","OLDER_ADULT",[66],{"facility":67,"status":7,"city":68,"state":69,"zip":70,"country":71,"geoPoint":72},"Yale University School of Medicine","New Haven","Connecticut","06511","United States",{"lat":73,"lon":74},41.30815,-72.92816,[76],{"name":77,"role":78,"phone":79,"email":80},"Shannon Zeilman","CONTACT","203-974-7822","shannon.zeilman@yale.edu",[82],{"name":83,"affiliation":12,"role":84},"Deepak C D'Souza","PRINCIPAL_INVESTIGATOR",[],[],{"nct_id":4,"conditions":88,"biomarkers":89},[18,19],[],{"nct_id":4,"found":57,"summary":91,"prompt_version":101},{"design":92,"status":93,"heading":94,"summary":95,"follow_up":96,"word_count":97,"commitments":98,"compensation":99,"drugs_mentioned":100},"This is an interventional study planning to enroll 51 participants, including individuals with Cannabis Use Disorder and healthy controls.","completed","SV2A Density and Cannabis Use Disorder Study","This study is looking at how cannabis use disorder (CUD) affects the brain. Researchers want to see if the density of synaptic vesicles (tiny sacs that store brain chemicals) in a part of the brain called the hippocampus changes after at least four weeks of not using cannabis. They will use a special brain scan called a PET scan with a drug called [11C]APP311 (UCB-J) to measure this. They will compare people with CUD to healthy individuals. The study also aims to see if these brain changes are linked to memory and how much cannabis someone has used over time. You may be able to join if you are 18-75 years old, use cannabis daily, have a CUD diagnosis, and are willing to try to quit.","The primary endpoint measures changes in hippocampal SV2A synaptic density approximately four weeks after the first scan.",126,"Participants will receive at least two [11C]APP311 (UCB-J) PET scans, given approximately four weeks apart.","Not stated in the trial record.",[24],"v2"]