Type1 Diabetes MellitusNCT00633763
PET-CT Scan Method to Monitor Pancreatic B-Cell Loss in Diabetes Mellitus
An observational study of Type1 Diabetes Mellitus, run by University of California, Irvine at 1 site in United States.
Trial summary
The pancreas is an organ that plays major roles in the digestion of food. A part of the pancreas called islet beta-cells produces insulin, which regulates the amount of glucose (a sugar) present in the blood at all times. Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Type1 Diabetes Mellitus
- What is being tested?
- 18F-fallypride
- Type of treatment
- Injection or infusion
- How many people
- 30 participants
- Where
- 1 siteUnited States
- Study dates
- Feb 2008to Jul 2008
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Study population: Joslin Diabetes Clinic at the University of California Irvine, age-matched controls will be obtained from Orange County California.
Who may be able to join
- T1DM patients that are over 18 years of age, have had T1DM for greater than 5 years and show a greater than 80% reduction in C-peptide blood levels following intravenous glucagon injection are eligible to participate in this study.
- Healthy controls that are over 18 years of age, show normal C-peptide blood levels following intravenous glucagon injection, and are age- and sex-matched with one of the T1DM patients included in the study, are eligible to participate in this study.
Who cannot join
- T1DM patients or healthy controls that are not over 18 years of age are not eligible to participate in this study.
- Pregnant females are not eligible to participate in this study because there is a chance PET/CT scans might be risky for the developing baby. Females physically capable of getting pregnant will be required to get a urine pregnancy test at no cost before each of the PET/CT scans. If the pregnancy test is positive, the T1DM patient or healthy control will be excluded from the study. The consent form describes the risks in detail and the need for women of childbearing age to undergo a pregnancy test.
- Subjects with a history of psychiatric illness, substance abuse history, clinically significant head trauma, active neurological disease, cardiovascular disease, liver disease or renal impairment, claustrophobia ((very upset and afraid of being in a small space) are not eligible for the study. Dr. Ping Wang will use the subjects history, blood chemistry, to identify individuals with cardiovascular disease, liver disease, or renal impairment.
- T1DM patients with C-peptide levels following intravenous glucagon injection that are not reduced greater than 80% are not eligible for the study.
- Healthy volunteers with C-peptide levels following intravenous glucagon injection that are reduced greater than 20% compared to established control values are not eligible for the study.
- To determine if it is safe to do the procedure, T1DM patients and healthy volunteers will be expected to tell the researchers about any radiation exposure the individual may have had (including diagnostic or treatment x-rays), and any history of head injury, kidney or bladder disease, or any other serious medical conditions.
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- T1DM patients and healthy volunteers will be expected to tell the researchers if they have surgical clips or metallic prostheses (i.e., replacement body parts, such as a hip joint) or a pacemaker or other pieces of metal in the body (shrapnel, metal filings, etc.).
- Patients with history of alcoholism or significant alcohol consumption will be excluded from the study.
- The consent form will be English, and non-English speakers will therefore be excluded from the study.
- Pregnant women are excluded because 18F-fallypride is a radioactive substance , which will be injected into the patient and could be hazardous to the fetus.
Trial locations and contacts
1 site in 1 country.
United States1 site
University of California Irvine Medical Center
Orange, California, 92868
About this study
The pancreas is an organ that plays major roles in the digestion of food. A part of the pancreas called islet beta-cells produces insulin, which regulates the amount of glucose (a sugar) present in the blood at all times. Type-1 Diabetes Mellitus (T1DM), an autoimmune disorder characterized by destruction of pancreatic islet beta-cells (the cells that produce insulin), affects at least a million individuals in the US alone. In T1DM, a type of white blood cells called T lymphocytes attacks and destroys the pancreatic islet beta-cells, leading to a loss of insulin, an increase in blood glucose, and a dependence on insulin injections for survival. Despite rigorous control of blood sugar, the majority of diabetic patients develop serious complications including retinopathy, nephropathy, neuropathy, microangiopathy and strokes.
Non-invasive methods to monitor pancreatic beta-cell loss associated with type-1 diabetes mellitus (T1DM) could improve early diagnosis, provide tools to measure responsiveness to new therapies, and evaluate the efficiency of pancreatic transplantation and graft survival.
Our goal is to develop a non-invasive PET-CT imaging method based on binding of a molecule (18F-fallypride) for tracking beta-cell loss during the progression of T1DM. In preliminary studies we demonstrated specific binding of 18F-fallypride to D2 receptors in rat pancreatic sections and we demonstrated that the loss of pancreatic beta cells in streptozotocin-treated rats was associated with a corresponding decrease in 18F-fallypride binding to pancreatic sections. A preliminary 18F-fallypride PET-CT study done by a collaborator in Ohio on a healthy volunteer, revealed 18F-fallypride-uptake by the pancreas that was distinguishable from surrounding tissues. Aim-1 of our project will measure the variability of 18F-fallypride PET-scanning of the pancreas in six healthy volunteers scanned twice with an interval of 4-6 weeks. In Aim-2 of our project, we will compare fallypride PET-CT scans of 12 patients with long-standing T1DM (nearly all beta cells destroyed) with 12 age- and sex-matched healthy volunteers. If we are able to distinguish between the two groups, we will in future (a) optimize the method so as to be able to detect a 20-30% loss of beta cells, and (b) perform PET-CT studies in new-onset T1DM patients and in at-risk first degree relatives of T1DM patients.
- Conditions
- Type1 Diabetes Mellitus
- Being tested
- 18F-fallypride
- Keywords
- Diagnostic, PET/CT imaging of pancreas, Detecting pancreatic beta cell loss during diabetes
- Medical subject headings
- Disease
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
18F-fallyprideDrug
Single bolus i.v. injection 60 minutes before PET-CT scanning. Maximum activity per single administration 5 mCi; maximum amount of drug per administration <10 micrograms.
18F-fallyprideDrug
I.v. bolus maximum activity per single administration 5 mCi; maximum amount of drug per administration <10 micrograms.
| Study group | Role | What they receive |
|---|---|---|
| 1 | Healthy individuals with normal C-peptide levels following i.v. glucagon challenge. These individuals will be administered 18F-fallypride and then subjected to PET-CT scanning of the pancreas and brain. The subject will be positioned in the PET/CT scanner and a low-dose CT (15-20 secs) of the abdomen carried out (with subjects breathing normally). A 30-min PET acquisition will then be started (three 10 min static frames or one 30 min static frame). The subject will then be repositioned for a low-dose CT scan of the head (15-20 secs) following which a 20-min PET acquisition will then be started (two 10 min static frames or one 20 min static frame). Receives: Drug: 18F-fallypride | |
| 2 | Patients with longstanding T1DM and <20% C-peptide levels following i.v. glucagon challenge will be consented. 18F-Fallypride injected intravenously and subjects allowed to wait for approx 1 hr for the uptake.(b) Subject positioned in the PET/CT scanner and a low-dose CT (15-20 secs) of the abdomen (pancreas) carried out (with subjects breathing normally).(c) A 30-min PET acquisition will then be started (three 10 min static frames or one 30 min static frame).(d) Subject repositioned for a low-dose CT scan of the head (15-20 secs).(e) A 20-min PET acquisition will then be started (two 10 min static frames or one 20 min static frame).(f) End of PET/CT scanning procedures. Subject taken out of the scanner. Receives: Drug: 18F-fallypride |
What is being measured
The primary outcome is the main question the study is designed to answer.
Difference in fallypride binding in the pancreas of long-standing T1DM patients versus healthy controls
Measured: At the end of the study when 12 controls and 12 patients have been studied.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted12 Mar 2008 (estimated)
- Study startFeb 2008
- Primary completionJul 2008
- Study completionJul 2008
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Type1 Diabetes MellitusStudies of the same condition, open and under way.
- More trials run by University of California, IrvineThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Case-control
- Time perspective
- Prospective
- Enrolment
- 30 participants (estimated)
Sponsor and investigators
- Lead sponsor
- University of California, Irvine
- Sponsor type
- University, hospital or other
- Collaborators
- Juvenile Diabetes Research Foundation
- Investigators
- George K Chandy, MD, PhD, Principal investigator, University of California, Irvine
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00633763
- Sponsor's protocol ID
- 2007-5785
- Status last verified
- May 2009
- First submitted
- 4 Mar 2008
- Last updated
- 29 May 2009
- Results posted
- No
- Data monitoring committee
- No
Study at a glance
From the registry record, last updated by the sponsor on 29 May 2009. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- PET-CT Scan Method to Monitor Pancreatic B-Cell Loss in Diabetes Mellitus
- ClinicalTrials.gov ID
- NCT00633763
- Acronym / sponsor ID
- 2007-5785
- Conditions
- Type1 Diabetes Mellitus
- Keywords
- Diagnostic, PET/CT imaging of pancreas, Detecting pancreatic beta cell loss during diabetes
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 30 participants (estimated)
- Lead sponsor
- University of California, IrvineUniversity, hospital or other
- Collaborators
- Juvenile Diabetes Research Foundation
- Study start
- Feb 2008
- Primary completion
- Jul 2008 (actual)
- Study completion
- Jul 2008 (actual)
- First posted
- 12 Mar 2008 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The pancreas is an organ that plays major roles in the digestion of food. A part of the pancreas called islet beta-cells produces insulin, which regulates the amount of glucose (a sugar) present in the blood at all times. Type-1 Diabetes Mellitus (T1DM), an autoimmune disorder characterized by destruction of pancreatic islet beta-cells (the cells that produce insulin), affects at least a million individuals in the US alone. In T1DM, a type of white blood cells called T lymphocytes attacks and destroys the pancreatic islet beta-cells, leading to a loss of insulin, an increase in blood glucose, and a dependence on insulin injections for survival. Despite rigorous control of blood sugar, the majority of diabetic patients develop serious complications including retinopathy, nephropathy, neuropathy, microangiopathy and strokes.
Non-invasive methods to monitor pancreatic beta-cell loss associated with type-1 diabetes mellitus (T1DM) could improve early diagnosis, provide tools to measure responsiveness to new therapies, and evaluate the efficiency of pancreatic transplantation and graft survival.
Our goal is to develop a non-invasive PET-CT imaging method based on binding of a molecule (18F-fallypride) for tracking beta-cell loss during the progression of T1DM. In preliminary studies we demonstrated specific binding of 18F-fallypride to D2 receptors in rat pancreatic sections and we demonstrated that the loss of pancreatic beta cells in streptozotocin-treated rats was associated with a corresponding decrease in 18F-fallypride binding to pancreatic sections. A preliminary 18F-fallypride PET-CT study done by a collaborator in Ohio on a healthy volunteer, revealed 18F-fallypride-uptake by the pancreas that was distinguishable from surrounding tissues. Aim-1 of our project will measure the variability of 18F-fallypride PET-scanning of the pancreas in six healthy volunteers scanned twice with an interval of 4-6 weeks. In Aim-2 of our project, we will compare fallypride PET-CT scans of 12 patients with long-standing T1DM (nearly all beta cells destroyed) with 12 age- and sex-matched healthy volunteers. If we are able to distinguish between the two groups, we will in future (a) optimize the method so as to be able to detect a 20-30% loss of beta cells, and (b) perform PET-CT studies in new-onset T1DM patients and in at-risk first degree relatives of T1DM patients.
Study design
- Observational model
- Case-control
- Time perspective
- Prospective
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| 1 | – | Drug: 18F-fallyprideHealthy individuals with normal C-peptide levels following i.v. glucagon challenge. These individuals will be administered 18F-fallypride and then subjected to PET-CT scanning of the pancreas and brain. The subject will be positioned in the PET/CT scanner and a low-dose CT (15-20 secs) of the abdomen carried out (with subjects breathing normally). A 30-min PET acquisition will then be started (three 10 min static frames or one 30 min static frame). The subject will then be repositioned for a low-dose CT scan of the head (15-20 secs) following which a 20-min PET acquisition will then be started (two 10 min static frames or one 20 min static frame). |
| 2 | – | Drug: 18F-fallypridePatients with longstanding T1DM and <20% C-peptide levels following i.v. glucagon challenge will be consented. 18F-Fallypride injected intravenously and subjects allowed to wait for approx 1 hr for the uptake.(b) Subject positioned in the PET/CT scanner and a low-dose CT (15-20 secs) of the abdomen (pancreas) carried out (with subjects breathing normally).(c) A 30-min PET acquisition will then be started (three 10 min static frames or one 30 min static frame).(d) Subject repositioned for a low-dose CT scan of the head (15-20 secs).(e) A 20-min PET acquisition will then be started (two 10 min static frames or one 20 min static frame).(f) End of PET/CT scanning procedures. Subject taken out of the scanner. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
- Study population
- Joslin Diabetes Clinic at the University of California Irvine, age-matched controls will be obtained from Orange County California.
Key inclusion criteria (2 listed)
- T1DM patients that are over 18 years of age, have had T1DM for greater than 5 years and show a greater than 80% reduction in C-peptide blood levels following intravenous glucagon injection are eligible to participate in this study.
- Healthy controls that are over 18 years of age, show normal C-peptide blood levels following intravenous glucagon injection, and are age- and sex-matched with one of the T1DM patients included in the study, are eligible to participate in this study.
Key exclusion criteria (10 listed)
- T1DM patients or healthy controls that are not over 18 years of age are not eligible to participate in this study.
- Pregnant females are not eligible to participate in this study because there is a chance PET/CT scans might be risky for the developing baby. Females physically capable of getting pregnant will be required to get a urine pregnancy test at no cost before each of the PET/CT scans. If the pregnancy test is positive, the T1DM patient or healthy control will be excluded from the study. The consent form describes the risks in detail and the need for women of childbearing age to undergo a pregnancy test.
- Subjects with a history of psychiatric illness, substance abuse history, clinically significant head trauma, active neurological disease, cardiovascular disease, liver disease or renal impairment, claustrophobia ((very upset and afraid of being in a small space) are not eligible for the study. Dr. Ping Wang will use the subjects history, blood chemistry, to identify individuals with cardiovascular disease, liver disease, or renal impairment.
- T1DM patients with C-peptide levels following intravenous glucagon injection that are not reduced greater than 80% are not eligible for the study.
- Healthy volunteers with C-peptide levels following intravenous glucagon injection that are reduced greater than 20% compared to established control values are not eligible for the study.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| 18F-fallyprideSingle bolus i.v. injection 60 minutes before PET-CT scanning. Maximum activity per single administration 5 mCi; maximum amount of drug per administration <10 micrograms. | Drug | 1, 2 |
| 18F-fallyprideI.v. bolus maximum activity per single administration 5 mCi; maximum amount of drug per administration <10 micrograms. | Drug | 1, 2 |
Primary outcome
Difference in fallypride binding in the pancreas of long-standing T1DM patients versus healthy controls
Time frame: At the end of the study when 12 controls and 12 patients have been studied.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 29 May 2009.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
George K Chandy, MD, PhD principal investigator
University of California, Irvine
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Type1 Diabetes Mellitus, run by University of California, Irvine at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 10 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 29 May 2009. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Difference in fallypride binding in the pancreas of long-standing T1DM patients versus healthy controls (time frame: At the end of the study when 12 controls and 12 patients have been studied.). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 29 May 2009.