[11C]Cimbi-36 Dosimetry

March 25, 2019 updated by: Gitte Moos Knudsen

Evaluation of Radiation Dose for [11C]Cimbi-36

The purpose of this study is to determine the dosimetry for the Positron Emission Tomography (PET) tracer [11C]Cimbi-36 in two different Carbon-11 labelling positions. This information will contribute to determining whether [11C]Cimbi-36 can be optimized by changing the C-11 labelling position.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Healthy subjects wil undergo a whole-body Positron Emission Tomography (PET) scan with the Serotonin 2A Receptor (5-HT2A) radioligand [11C]Cimbi-36 or [11C]Cimbi-36-5 to determine the effective radiation dose and radiation dose for selected organs.

Study Type

Interventional

Enrollment (Actual)

8

Phase

  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Denmark
      • Copenhagen, Denmark, 2100
        • Neurobiology Research Unit, Rigshospitalet

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • 18 years of age
  • Signed informed consent

Exclusion Criteria:

  • Present or former neurological disease, severe somatic or psychiatric disease, or medication thet can interfere with the test results.
  • Pregnancy at the time of the scan
  • Breastfeeding
  • Alcohol or substance abuse
  • Exposure to radiation (>10 millisievert (mSv)) within the last year, or significant exposure at work
  • Allergy to any of the substances in the Investigational medicinal product (IMP) formulation

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Basic Science
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: [11C]Cimbi-36

[11C]Cimbi-36

Maximum of 600 Mega Becquerel (MBq) or 1.5 micrograms, single dose intravenous (I.V.)
Drug: [11C]Cimbi-36
Active Comparator: [11C]Cimbi-36-5

[11C]Cimbi-36-5

Maximum of 600 Mega Becquerel (MBq) or 1.5 micrograms, single dose intravenous (I.V.)
Drug: [11C]Cimbi-36-5

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Effective dose and absorbed dose for selected organs
Time Frame: 0 - 120 minutes
Based on the Positron Emission Tomography (PET) scan Time activity curves (TACs) will be generated and used for calculating the radiation doses for selected organs and over all effective radiation dose.
0 - 120 minutes

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Measurement of radioactive metabolites in plasma
Time Frame: 0 - 120 minutes
Venous blood samples will be used to measure radioactive metabolites and parent compound in the blood, using radio-High-performance liquid chromatography (HPLC). The parameters will be parent radioactivity and metabolite radioactivity as a fraction (unitless) of total radioactivity in plasma over time (unit = minutes).
0 - 120 minutes
Measurement of radioactivity in plasma and whole blood
Time Frame: 0 - 120 minutes
Venous blood samples will be used to measure radioactivity in plasma and whole blood. The measurement will be given as a ratio (unitless) of plasma radioactivity relative to whole blood radioactivity over time (unit = minutes).
0 - 120 minutes

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Gitte Moos Knudsen

Investigators

  • Study Chair: Gitte M Knudsen, MD, DMSc, Neurobiology Research Unit, Rigshospitalet

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

December 1, 2015

Primary Completion (Actual)

October 10, 2018

Study Completion (Actual)

October 10, 2018

Study Registration Dates

First Submitted

December 7, 2015

First Submitted That Met QC Criteria

December 9, 2015

First Posted (Estimate)

December 11, 2015

Study Record Updates

Last Update Posted (Actual)

March 26, 2019

Last Update Submitted That Met QC Criteria

March 25, 2019

Last Verified

March 1, 2019

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • H-15001910

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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