A Phase I Study: PET Imaging of Cancer Patients Using [18F] 4-L-Fluoroglutamine (2S,4R)
This is a Phase I study. This study is the first time that a new experimental drug called 18FFluoroglutamine, or F-Glutamine, is being used in people. F-Glutamine is a drug designed to be used with PET scanners that can 'see' where F-Glutamine goes in the body, after its injected. PET scanners are one of the kinds of scanners you normally find in a hospital radiology department. The researchers have found that tumors in animals absorb F-Glutamine. The researchers believe that scans with F-Glutamine might be able to find tumors in patients.
This first in-human study is being done to see how long F-Glutamine lasts in the blood, when it is given to people in tiny amounts by an injection, and to see where F-Glutamine goes in the body. If the results of this trial are good, then the study doctors plan to use F-Glutamine in another trial to see if scans with F-Glutamine are better for finding tumors compared to the standard types of scans that doctors use.
Drug: [18F] 4-L-Fluoroglutamine (2S,4R)
|Study Design:||Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Diagnostic
|Official Title:||A Phase I Study: PET Imaging of Cancer Patients Using [18F] 4-L-Fluoroglutamine (2S,4R)|
- pharmacokinetic profiles [ Time Frame: 2 years ]The trial-design follows standard guidelines on collecting pharmacokinetic (PK) data for investigational radioactive drugs.1, 29-36 Animal [18F] 4-L-of [18F] 4-L-Fluoroglutamine (2S,4R). Fluoroglutamine (2S,4R) PK data provided a basis for the trial design. Sampling time-points were chosen (1) by anticipated exponential PK; with (2) allometry-based interspecies extrapolation of time-scales.37 As data is available from the first patients, suitability of the time-points will be re-examined. Blood samples will be centrifuged and the plasma pipetted, weighed and counted to determine the plasma time activity concentration curves (% injected dose/liter), as well as for metabolite analysis of the [18F] 4-L-Fluoroglutamine (2S,4R) compound (by radio-HPLC or other fit-for-purpose methodology).
- metabolism [ Time Frame: 2 years ]Blood samples will be centrifuged and the plasma pipetted, weighed and counted to determine the plasma time activity concentration curves (% injected dose/liter), as well as for metabolite analysis of the [18F] 4-L-Fluoroglutamine (2S,4R) compound (by radio-HPLC or other fit-for-purpose methodology).
- bio distribution [ Time Frame: 2 years ]These data will be obtained in the form of serial PET imaging to detect and quantify changes [18F] 4-L-Fluoroglutamine (2S,4R) biodistribution at multiple time-points, as well as serial venous blood-assays. Our PET scans are routinely corrected for attenuation and scatter and adjusted for system sensitivity and provide quantitative images of the tracer concentration within the imaging field of view, which is often reported in terms of standardized uptake values (SUV) (= μCi found/gm tissue / μCi injected/gm body mass).
- radiation dosimetry [ Time Frame: 2 years ]OLINDA 1.1 software, an FDA-approved radiation-dosimetry software package42, 43 will be used to obtain absorbed dose & effective dose measurements. In brief, this entails its automated application of the MIRD formalism to the experimental time-integrated activity coefficients, with dose-factor values defined by standard isotope data and a hermaphroditic anthropomorphic model.34, 36, 38, 44 . OLINDA implements conventional biokinetic models of the urinary bladder and gastrointestinal tract to account for the dosimetric contribution of radioactive excreta.
|Study Start Date:||September 2012|
|Estimated Study Completion Date:||September 2017|
|Estimated Primary Completion Date:||September 2017 (Final data collection date for primary outcome measure)|
Experimental: [18F] 4-L-Fluoroglutamine (2S,4R)
This pilot, first in-human microdose PET trial of the positron-emitting agent [18F] 4-L-Fluoroglutamine (2S,4R) will be an open-label study. The [18F] 4-L-Fluoroglutamine (2S,4R) agent will be administered by bolus intravenous injection. In all study patients, the pharmacokinetics, metabolism, and biodistribution of [18F] 4-L-Fluoroglutamine (2S,4R) will be evaluated by non-invasive blood- and PET-based assays, at multiple time points (see Table 1,) during one day. Eligible patients optionally can participate in the study twice, on a separate date, receiving a second radiotracer microdose of [18F] 4-L-Fluoroglutamine (2S,4R), followed by non-invasive blood- and PET-based assays. At the discretion of the investigator, scan 3 can be waived.
Drug: [18F] 4-L-Fluoroglutamine (2S,4R)
Thirty cancer patients will receive an injection of a 0.5 to 7.5mCi of [18F] 4-LFluoroglutamine (2S,4R) , followed by serial PET/CT scanning and blood draws, (at the direction of the investigator) over a period of 3.5 hours, on a single day. Each patient will be offered the opportunity to repeat the [18F] 4-L-Fluoroglutamine (2S,4R) injection and subsequent set of post-injection PET-CT scans, once, on a separate date. At the discretion of the investigator, scan 3 can be waived. Immediately prior to injection of the radiotracer, a blood sample will be obtained for measurement of serum glutamine level. The serum glutamine level will be assayed, if necessary, as part of an amino acid screen assay.
Please refer to this study by its ClinicalTrials.gov identifier: NCT01697930
|Contact: Mark Dunphy, D.O.||212-639-8131|
|Contact: David Kelsen, MD||646-888-4179|
|United States, New York|
|Memorial Sloan Kettering Cancer Center||Recruiting|
|New York, New York, United States, 10065|
|Contact: Mark Dunphy, DO 212-639-8131|
|Contact: David Kelsen, MD 646-888-4179|
|Principal Investigator: Mark Dunphy, DO|
|Principal Investigator:||Mark Dunphy, D.O.||Memorial Sloan Kettering Cancer Center|