PET Imaging With Tc-94m Sestamibi to Assess Resistance to Chemotherapy
August 16, 2017 updated by: Peter Choyke, M.D., National Cancer Institute (NCI)
A Pilot Study of Tc-94m Sestamibi PET MDR Imaging
Background:
- Tc-94m sestamibi is a radioactive imaging drug approved by the Food and Drug Administration to help photograph and study bodily functions.
- Tc-94m sestamibi accumulates in tumor cells and is eliminated from them in much the same way that some chemotherapy drugs are eliminated from cancer cells in patients with drug resistance.
- P-glycoprotein is a protein found on the surface of some cancer cells. The protein causes the cells to pump out, or reject, some types of chemotherapy drugs. P-glycoprotein also makes the cells reject sestamibi.
- Some drugs, including a drug called tariquidar, may block the pumping action of P-glycoprotein, giving the chemotherapy more time to work. Tariquidar can also help sestamibi stay in the cells longer.
Objectives:
-To evaluate the use of sestamibi for determining if chemotherapy is being rejected and if enough of the blocking drugs are present to stop the rejection.
Eligibility:
-Patients18 years of age and older with a tumor 2 cm or larger who are enrolled in or are eligible for enrollment in an active National Cancer Institute treatment protocol.
Design:
- Patients have two scans, one before receiving any drugs and a second 1-2 hours after receiving tariquidar. The second scan is done 72 or more hours after the first. For both scans, Tc-94m sestamibi is injected into a vein and a series of pictures are taken with an imaging camera called a PET (positron emission tomography) scanner. The pictures show where the sestamibi distributes in the body and monitors the effects of tariquidar on drug resistance. Blood samples are collected during the scan to examine the effect of tariquidar on P-glycoprotein in normal cells.
- Some patients may be asked to undergo a tumor biopsy to test for the presence of the P-glycoprotein on their cancer cells. This will be requested only in patients whose tumor is easily accessible and in whom a biopsy can be done with minimal risk.
Study Overview
Detailed Description
Background:
- A pilot study of PET imaging with Tc-94m sestamibi to assess activity of the multidrug transporter, MDR-1 (Multi Drug Resistance Protein 1)/P-glycoprotein, an ATP (adenosine 5'-triphosphate)-binding cassette protein that transports drug out of the cell, thereby reducing intracellular drug accumulation.
- Tariquidar is a safe, nontoxic antagonist of P-glycoprotein. Previous studies demonstrated that tariquidar increased retention of the radioimaging agent, Tc99 sestamibi in normal liver and in a subset of tumors. These studies were limited by the semiquantitative nature of total body imaging by conventional radionuclide scintigraphy
- In collaboration with the Clinical Center Nuclear Medicine Department, a PET imaging agent has been developed, Tc-94m sestamibi, and the FDA (Food and Drug Administration) has granted approval for its use in humans.
Objectives:
-To evaluate the feasibility of Tc-94m sestamibi as a PET imaging agent, which should allow greater resolution and quantitation and thereby make possible direct quantitative comparisons of tumor uptake before and after treatment with a P-glycoprotein antagonist.
Eligibility:
- Patients over 18 years of age, who are eligible for, or have completed enrollment in an active NCI (National Cancer Institute) protocol for treatment of cancer.
- Negative pregnancy test within 24 hrs of Tc-94m injection.
- An index lesion greater than 2cm will be required to optimize the PET images.
- Prior treatment with a P-glycoprotein antagonist is allowed.
Design:
- Designed as a feasibility study. Patients meeting the eligibility criteria and signing informed consent will undergo a PET sestamibi imaging scan in the Department of Nuclear Medicine. Seventy-two hours later, a dose of tariquidar will be administered before a repeat imaging study.
- Blood will be obtained for analysis of the pharmacokinetics of Tc-94m sestamibi, and for isolation of peripheral blood mononuclear cells to assay P-glycoprotein inhibition in circulating CD56+ cells. These assessments are needed to confirm the impact of tariquidar on P-glycoprotein in normal cells - for example, those involved in drug excretion and in circulating mononuclear cells. These results will then be used to inform the findings in the PET imaging study.
- Fifteen patients will be enrolled and pairwise comparisons will be made between the sestamibi residence times in tumor, normal liver, kidney, and heart. All comparisons are noted to be exploratory.
Study Type
Interventional
Enrollment (Actual)
12
Phase
- Phase 2
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
-
-
Maryland
-
Bethesda, Maryland, United States, 20892
- National Institutes of Health Clinical Center, 9000 Rockville Pike
-
-
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 65 years (Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
- INCLUSION CRITERIA:
Patients must be eligible for enrollment in an active NCI (National Cancer Institute) protocol for treatment of cancer.
Patients greater than or equal to 18 years old.
Performance Status ECOG (Eastern Cooperative Oncology Group) 0 - 2.
Patients must be able to give informed consent.
Women of childbearing potential must have a negative pregnancy test within 24 hrs of Tc-94m injection.
Patients who have previously received tariquidar will be eligible, since no study has systematically shown loss of MDR-1 (Multi Drug Resistance Protein 1)/Pgp expression in tumors following exposure to both tariquidar and an anticancer agent.
An index lesion greater than 1.5 cm will be required to optimize the PET (positron emission imaging) images.
EXCLUSION CRITERIA:
Patients who are pregnant or breast-feeding will not be enrolled in order to prevent radiation exposure in the developing fetus or infant.
Patients weighing greater than 136 kg (the weight limit for the scanner table).
Patients having only tumor sizes less than 1.5 cm will be excluded.
HIV (human immunodeficiency virus) positive patients will be excluded to prevent potential drug interactions between tariquidar and antiretroviral agents.
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: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
|---|---|
|
Experimental: PET (positron emission imaging) Imaging with Tc-94m Sestamibi
PET sestamibi scans followed by tariquidar and repeat imaging
|
3 days after initial PET patients will receive tariquidar and repeat imaging.
Patients over 18 years of age, who are eligible for, or have completed enrollment in an active NCI (National Cancer Institute) protocol for treatment of cancer will undergo a PET sestamibi scan
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
|---|---|---|
|
Percent Change in Tc-94m Sestamibi Body Weight Standardized Uptake Value (SUV) Maximum in Tumor Tissue Before and After Administration of Tariquidar, a P-glycoprotein Antagonist.
Time Frame: 3 days
|
Sestamibi is a Pgp substrate that may be a surrogate for measuring drug efflux from tumors.
Significant increase in the SUV in tumor is +25% over baseline.
|
3 days
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
|---|---|---|
|
Number of Participants With Adverse Events
Time Frame: 69 months
|
Here is the number of participants with adverse events.
For a detailed list of adverse events, see the adverse event module.
|
69 months
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Investigators
- Principal Investigator: Peter Choyke, M.D., National Cancer Institute (NCI)
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
- Advani R, Saba HI, Tallman MS, Rowe JM, Wiernik PH, Ramek J, Dugan K, Lum B, Villena J, Davis E, Paietta E, Litchman M, Sikic BI, Greenberg PL. Treatment of refractory and relapsed acute myelogenous leukemia with combination chemotherapy plus the multidrug resistance modulator PSC 833 (Valspodar). Blood. 1999 Feb 1;93(3):787-95.
- Agrawal M, Abraham J, Balis FM, Edgerly M, Stein WD, Bates S, Fojo T, Chen CC. Increased 99mTc-sestamibi accumulation in normal liver and drug-resistant tumors after the administration of the glycoprotein inhibitor, XR9576. Clin Cancer Res. 2003 Feb;9(2):650-6.
- Bakker M, van der Graaf WT, Piers DA, Franssen EJ, Groen HJ, Smit EF, Kool W, Hollema H, Muller EA, De Vries EG. 99mTc-Sestamibi scanning with SDZ PSC 833 as a functional detection method for resistance modulation in patients with solid tumours. Anticancer Res. 1999 May-Jun;19(3B):2349-53.
- Chen CC, Meadows B, Regis J, Kalafsky G, Fojo T, Carrasquillo JA, Bates SE. Detection of in vivo P-glycoprotein inhibition by PSC 833 using Tc-99m sestamibi. Clin Cancer Res. 1997 Apr;3(4):545-52.
- Bates SE, Bakke S, Kang M, Robey RW, Zhai S, Thambi P, Chen CC, Patil S, Smith T, Steinberg SM, Merino M, Goldspiel B, Meadows B, Stein WD, Choyke P, Balis F, Figg WD, Fojo T. A phase I/II study of infusional vinblastine with the P-glycoprotein antagonist valspodar (PSC 833) in renal cell carcinoma. Clin Cancer Res. 2004 Jul 15;10(14):4724-33. doi: 10.1158/1078-0432.CCR-0829-03.
- Kelly RJ, Robey RW, Chen CC, Draper D, Luchenko V, Barnett D, Oldham RK, Caluag Z, Frye AR, Steinberg SM, Fojo T, Bates SE. A pharmacodynamic study of the P-glycoprotein antagonist CBT-1(R) in combination with paclitaxel in solid tumors. Oncologist. 2012;17(4):512. doi: 10.1634/theoncologist.2012-0080. Epub 2012 Mar 13.
Helpful Links
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)
May 16, 2004
Primary Completion (Actual)
April 14, 2014
Study Completion (Actual)
April 14, 2014
Study Registration Dates
First Submitted
July 7, 2006
First Submitted That Met QC Criteria
May 5, 2004
First Posted (Estimate)
May 6, 2004
Study Record Updates
Last Update Posted (Actual)
August 17, 2017
Last Update Submitted That Met QC Criteria
August 16, 2017
Last Verified
August 1, 2017
More Information
Terms related to this study
Keywords
Other Study ID Numbers
- 040177
- 04-C-0177
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
No
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Yes
Studies a U.S. FDA-regulated device product
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.