Clinical Translation of 18F-Labeled Hydroxyphenethylguanidines

June 30, 2017 updated by: David M. Raffel, Ph.D., University of Michigan

Clinical Translation of 18F-Labeled Hydroxyphenethylguanidines for Quantification of Regional Cardiac Sympathetic Nerve Density With PET

The purpose of this study is to perform first-in-human PET imaging studies of two new cardiac sympathetic nerve imaging agents, 4-[18F]fluoro-meta-hydroxyphenethylguanidine ([18F]4F-MHPG) and 3-[18F]fluoro-para-hydroxyphenethylguanidine ([18F]3F-PHPG).

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

In this study, PET imaging studies of two structurally related 18F-hydroxyphenethylguanidines, 4-[18F]fluoro-meta-hydroxyphenethylguanidine ([18F]4F-MHPG) and 3-[18F]fluoro-para-hydroxyphenethylguanidine ([18F]3F-PHPG) will be performed. All studies will be performed in normal healthy volunteers.

PET stands for Positron Emission Tomography which is a type of imaging that uses a radioactive tracer. This is also called a radiotracer which is a compound linked to a radioactive element. Most compounds are short-lived, meaning that the radioactivity breaks down quickly or is excreted from the body.

In the first stage of the study, dynamic PET imaging for 90 min will be done with [18F]4F-MHPG (n = 4) and [18F]3F-PHPG (n = 4).

Data from these studies will assess each radiotracer's imaging properties, pharmacokinetics and metabolic breakdown in plasma. Application of tracer kinetic analysis methods to the kinetics of each tracer in heart and plasma will be studied to see if these methods can provide accurate measurements of regional nerve sympathetic nerve density in the hearts of human subjects. Results from these initial studies will be used to select the lead compound for further studies in patient populations.

In the second stage of the study, whole-body PET imaging studies (n = 4) with the selected lead radiotracer will be performed to acquire data necessary for generating more accurate human radiation absorbed dose estimates.

Study Type

Interventional

Enrollment (Actual)

16

Phase

  • Early 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

  • United States
    • Michigan
      • Ann Arbor, Michigan, United States, 48109
        • University of Michigan

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 to 55 years (Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Non-obese (BMI < 30)
  • Normal blood pressure
  • Normal blood lipid profile
  • No history of prior cardiovascular disease
  • Not susceptible to claustrophobia
  • Ability to lay flat for 90 min

Exclusion Criteria:

  • Obesity (BMI > 30)
  • Risk factors for heart disease (age > 55y, hypertension, smoking, high blood pressure, high cholesterol levels, diabetes, etc.)
  • History of heart disease (heart attack, atrial fibrillation, ventricular tachycardia, exertional angina)
  • Currently using certain medications that may interact with cardiac nerves (antidepressants, cold medications, nasal decongestants, monoamine oxidase inhibitors, etc.)
  • Claustrophobia
  • Inability to lie flat for 90 min
  • Pregnant or breast feeding

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: Diagnostic
  • Allocation: Non-Randomized
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Protocol 1: [18F]4F-MHPG
Subjects (n = 4) will be injected one time with 6.5 mCi of 4-[18F]fluoro-meta-hydroxyphenethylguanidine ([18F]4F-MHPG) and receive a 90 minute PET scan.
Drug: [18F]4F-MHPG
IV injection of [18F]4F-MHPG
Other Names:
  • 4-[18F]fluoro-meta-hydroxyphenethylguanidine
Experimental: Protocol 1: [18F]3F-PHPG
Subjects (n = 4) will be injected one time with 6.5 mCi of 3-[18F]fluoro-para-hydroxyphenethylguanidine ([18F]3F-PHPG) and receive a 90 minute PET scan.
Drug: [18F]3F-PHPG
IV injection of [18F]3F-PHPG
Other Names:
  • 3-[18F]fluoro-para-hydroxyphenethylguanidine
Experimental: Protocol 2: Biodistribution Studies
Subjects (n = 4) will be injected one time with 6.5 mCi of either [18F]4F-MHPG or [18F]3F-PHPG (whichever is selected based on Protocol 1 studies) and receive four whole-body PET scans, starting at 5 min, 60 min, 150 min and 360 min after tracer injection.
Drug: [18F]4F-MHPG
IV injection of [18F]4F-MHPG
Other Names:
  • 4-[18F]fluoro-meta-hydroxyphenethylguanidine
Drug: [18F]3F-PHPG
IV injection of [18F]3F-PHPG
Other Names:
  • 3-[18F]fluoro-para-hydroxyphenethylguanidine

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Composite measure based on radiotracer tissue uptake ratios (heart-to-lung ratio, heart-to-liver ratio, heart-to-blood ratio) and rates of metabolism in plasma (half-time, in minutes) of [18F]4F-MHPG and [18F]3F-PHPG in healthy subjects.
Time Frame: 3 months
These data will be used to select the lead radiotracer for further clinical development.
3 months

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Radiation Dose
Time Frame: 1 year
Human radiation absorbed dose estimates based on the kinetics of the selected lead radiotracer in various organs, as extracted from whole-body PET scans.
1 year
Number of Adverse Events
Time Frame: 30 days
Number of study participants with adverse events as a measure of safety and tolerability following intravenous administration of [18F]4F-MHPG or [18F]3F-PHPG
30 days

Collaborators and Investigators

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

Sponsor

University of Michigan

Investigators

  • Principal Investigator: David M Raffel, PhD, University of Michigan

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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 (Actual)

March 1, 2015

Primary Completion (Actual)

August 1, 2016

Study Completion (Actual)

August 1, 2016

Study Registration Dates

First Submitted

February 25, 2015

First Submitted That Met QC Criteria

March 10, 2015

First Posted (Estimate)

March 11, 2015

Study Record Updates

Last Update Posted (Actual)

July 2, 2017

Last Update Submitted That Met QC Criteria

June 30, 2017

Last Verified

June 1, 2017

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • HUM00088601

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

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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