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Oxytocin Receptor PET Study in Healthy Volunteers

Oxytocin Receptor PET Study in Healthy Volunteers

Status
Recruiting
Phases
Phase 1
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCTs041250182
Enrollment
12
Registered
2026-02-10
Start date
2026-03-26
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

none

Interventions

Healthy volunteers will receive an intravenous injection of the OXTR-PET tracer [11C]OCS5 followed by PET imaging. Blood samples necessary for kinetic analysis will also be collected. To evaluate the

Sponsors

Yamasue Hidenori
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: (1) Males and females aged 18 years or older but under 55 years at the time of consent acquisition (2) Healthy individuals with no past medical history (excluding infectious diseases that do not leave sequelae) or current medical conditions (3) Individuals for whom written consent to participate in this study has been obtained from the subject themselves

Exclusion criteria

Exclusion criteria: (1) Individuals diagnosed with a mental disorder or intellectual disability (2) Use of psychotropic medications within the past 6 months (3) Individuals who are pregnant, breastfeeding, or may be pregnant (4) History of hypersensitivity to oxytocin (5) History of epileptic seizures or head trauma with loss of consciousness lasting 5 minutes or longer (6) History of alcohol-related disorders or other substance-related disorders (7) Individuals with serious concomitant diseases (8) Individuals with severe allergies or idiosyncrasies, such as anaphylaxis (9) Individuals unable to obtain consent to use contraception during the study period (10) Individuals who participated in another PET study (involving radiation exposure) within one year prior to obtaining consent (11) Individuals deemed ineligible for this study by the principal investigator (or co-investigator)

Design outcomes

Primary

MeasureTime frame
Brain Distribution Following Administration of the OXTR-PET Tracer [11C]OCS5 Injection

Secondary

MeasureTime frame
Safety and Pharmacokinetics of the OXTR-PET Tracer [11C]OCS5 Estimated Radiation Exposure Following Administration of the [11C]OCS5 Injection Association between Brain Distribution Following Administration of OXTR-PET Tracer [11C]OCS5 Injection and Individual Differences in Social Behavior and Mental Functioning (Frequency of Nonverbal Information Utilization in the Nonverbal Judgment Task (NVJ), Reaction Time (RT) and Eye Gaze (EG) During the Task, Social Responsiveness Scale (SRS), Autism Quotient (AQ), Stress and Anxiety Assessment (State and Trait Anxiety: STAI), Social Functioning Scale (SFS), Socioeconomic Status (SES) Gender Differences in Brain Distribution Following Administration of the OXTR-PET Tracer [11C]OCS5 Injection Relationship Between Brain Distribution Following Administration of the OXTR-PET Tracer [11C]OCS5 Injection and OXT Blood Concentration Relationship Between Brain Distribution Following Administration of the OXTR-PET Tracer [11C]OCS5 Injection and Brain Function/Structure Indicators Measured by MRI

Contacts

Public ContactMasamichi Yokokura

Hamamatsu University School of Medicine

oxtr@hama-med.ac.jp+81-53-435-2295

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026