Hyperpolarized 13C Pyruvate MRI for Treatment Response Assessment in Pancreatic Ductal Adenocarcinoma

Brief summary public domain (ClinicalTrials.gov)

This phase II trial investigates whether magnetic resonance imaging (MRI) using hyperpolarized carbon-13 (13C) pyruvate can be useful for evaluating early treatment response in patients with pancreatic cancer that has spread to nearby tissue or lymph nodes (locally advanced) or spread to other places in the body (metastatic). Hyperpolarized 13C pyruvate is different from standard clinical MRI contrast (e.g. gadolinium) in that it provides information on how a tumor processes nutrients. MRI is used to see tumor uptake and breakdown of hyperpolarized carbon-13 pyruvate molecules, which can tell how the tumor processes nutrients. Hyperpolarized 13C pyruvate MRI may help in understanding how the tumor responds to the treatments patients may be receiving.

Detailed description public domain (ClinicalTrials.gov)

PRIMARY OBJECTIVES: I. To determine the signal-to-noise ratio of 13C pyruvate metabolism (peak 13C lactate/pyruvate ratio, 13C lactate/pyruvate area-under-the-curve (AUC) ratio, and apparent rate constant for pyruvate-to-lactate conversion, kPL) in the target tumor (primary tumor and/or abdominal metastases) in Cohort A. II. To determine the percent changes in the target tumor (primary tumor and/or abdominal metastases) 13C pyruvate metabolism (peak 13C lactate/pyruvate ratio, 13C lactate/pyruvate AUC ratio, and kPL) between pre-treatment scan and scan obtained at 4-week (+/-2 weeks) following treatment initiation in Cohort B. SECONDARY OBJECTIVES: I. To determine the repeatability of 13C pyruvate metabolism measures in the target tumor (primary tumor and/or abdominal metastasis) in patients with same-day repeated dose in Cohort A and B. II. To determine whether the baseline or the changes in the target tumor (primary tumor and/or abdominal metastases) 13C pyruvate metabolism at 4 weeks following treatment initiation are associated with the best objective response as defined by Response Evaluation Criteria in Solid Tumors (RECIST) criteria on subsequent clinical computed tomography (CT) scans in Cohort B. EXPLORATORY OBJECTIVE: I. To explore 13C pyruvate metabolism between the primary tumor and abdominal metastases (when present) both at baseline and following treatment in both Cohort A and B. OUTLINE: Patients are assigned to 1 of 2 cohorts. COHORT A: Patients receive hyperpolarized carbon C 13 pyruvate intravenously (IV) over less than one minute then undergo MRI over 5 minutes at baseline in the absence of unacceptable toxicity. COHORT B: Patients receive hyperpolarized carbon C 13 pyruvate IV over less than one minute then undergo MRI over 5 minutes at baseline and 4 weeks after beginning treatment in the absence of unacceptable toxicity. In both cohorts, patients may receive an optional second hyperpolarized carbon C 13 pyruvate dose and undergo MRI within 15 to 60 minutes following the completion of the first scan. After completion of study treatment, patients are followed up every 2-3 months

Posted results (ClinicalTrials.gov registry) · primary outcome public domain (ClinicalTrials.gov)

Cohort A: Signal-to-noise Ratio of the Target Lesion 13C Pyruvate Metabolism Measures Will be Determined for Each Patient [Baseline].

Posted results (ClinicalTrials.gov registry) · primary outcome public domain (ClinicalTrials.gov)

Cohort B: Target Tumor Metabolism [Up to 4 weeks].

Posted results (ClinicalTrials.gov registry) · secondary outcome public domain (ClinicalTrials.gov)

Cohort A: Intraclass Correlation Coefficient (ICC) [Up to 6 months].

Posted results (ClinicalTrials.gov registry) · secondary outcome public domain (ClinicalTrials.gov)

Cohort B: Best Objective Response [Up to 4 weeks after treatment initiation].