Dosimetry and Biodistribution of [18F]-Fludarabine in Lymphoid Malignancies

Study Overview
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Brief Summary
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The application of positron emission tomography with lymphoproliferative diseases today provides diagnostic and therapeutic information of major importance , especially in terms of speed and quality of response to treatment. The radiopharmaceutical used in clinical practice for this exam is fluorodeoxyglucose 18F-2-fluoro-2-deoxy-D-glucose fluorodeoxyglucose ([18F]-FDG) . However , the uptake of this tracer is not elective in lymphoid tissues , with a lack of specificity. In addition , the avidity of this tracer is unequal according to the histological subtype (lack of sensitivity). To try to improve the results of this clinical exploration of lymphoid malignancies, the investigators developed a new radiopharmaceutical ( [18F] - fludarabine ). The idea of transforming the fludarabine radiopharmaceutical is based on the existence of a fluorine atom in the molecule and the pharmacokinetic characteristics of this drug. The [18F]-Fludarabine is a new radiopharmaceutical reproducing the same dosage formulation of fludarabine , a drug used for the treatment of certain types of lymphoproliferative diseases, especially those where the tumor cells have a low proliferation kinetics . This drug is used in therapy in particular pharmacokinetic effect for a high affinity for the lymphoid tissue . Preclinical results on normal and lymphoma xenograft -bearing mice showed a specificity restricted to lymphoid tissue fixation with [18F]-Fludarabine compared with [18F]-FDG . Based on these encouraging results , the investigators propose in this work to explore the Dosimetry and Biodistribution of [18F] - Fludarabine in human lymphoproliferative diseases : 1)A first group of patients with non-Hodgkin's large cell lymphomas in which it already has a wealth of experience in exploration [18F]-FDG, and 2) a second group of patients with chronic lymphocytic leukemia, where the results of the exploration [18F]-FDG are considered disappointing and did not, for this reason, experienced clinical development.

Official Title
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Dosimetry and Biodistribution of [18F]-Fludarabine in Lymphoid Malignancies

Conditions
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Untreated B-Chronic Lymphocytic Leukemia or Diffuse Large B Cells Lymphoma Patients

Intervention / Treatment
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* Other: [18F] - Fludarabine PET/CT


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Adult over 18 Signed written informed consent Untreated stage B or C chronic lymphocytic leukemia Untreated diffuse large B-cell lymphoma Eligible for PET-CT The subject must be covered by a social security system Exclusion Criteria: Age under 18 Patients concurrently included in an investigational trial Weight over 120 kg pregnant women active infectious disease immune hemolytic anemia patients with creatinine clearance < 30 ml/mn corticosteroid therapy

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Diagnostic
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: FLUDATEP<br>[18F] - Fludarabine PET/CT | Other: [18F] - Fludarabine PET/CT<br>* [18F] - Fludarabine PET/CT before treatment<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Standardized measure of [18F]-Fludarabine uptake in tumor tissue. | Measure of the Standard Uptake Value (SUV) for each lesion. | Day 0 ([18F]-Fludarabine PET-CT day) | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Calculation of the equivalent dose to all organs and evaluation of effective dose to the whole body |  | Day 0 ([18F]-Fludarabine PET-CT day) | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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PET, Chronic lymphocytic Leukemia (CLL), Diffuse Large B Cells Lymphoma (DLBCL), Fludarabine