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Optimalisatie van de behandeling van uitgezaaide darmkanker met cetuximab middels opname metingen van 89Zr gelabeld cetuximab mbv PET.


- candidate number12379
- NTR NumberNTR3433
- ISRCTNISRCTN wordt niet meer aangevraagd.
- Date ISRCTN created
- date ISRCTN requested
- Date Registered NTR15-mei-2012
- Secondary IDs2010/323 METC VUmc
- Public TitleOptimalisatie van de behandeling van uitgezaaide darmkanker met cetuximab middels opname metingen van 89Zr gelabeld cetuximab mbv PET.
- Scientific TitleTreatment optimization of cetuximab in patients with metastatic colorectal cancer based on tumor uptake of 89Zr-labeled cetuximab assessed by PET.
- ACRONYM
- hypothesisN/A
- Healt Condition(s) or Problem(s) studiedColorectal metastised cancer
- Inclusion criteria1. Advanced colorectal adenocarcinoma;
2. Subjects must have been treated according to standard care with a fluoropyrimidine (e.g. fluorouracil or capecitabine), irinotecan, and oxaliplatin or had contra-indications to treatment with these drugs;
3. Age ≥ 18 years;
4. Histological or cytological documentation of cancer is required;
5. Tumor material must be tested wild type for the K-Ras gene;
6. Subjects have at least one measurable lesion outside the liver. Lesions must be evaluated by CT-scan or MRI according to Response Evaluation Criteria in Solid Tumors (RECIST 1.1);
7. ECOG Performance Status of 0, 1 or 2;
8. Adequate liver and renal functions as assessed by the following laboratory requirements to be conducted within 7 days prior to screening:
A. Total bilirubin ≤ 1.5 times the upper limit of normal;
B. ALT and AST ≤ 2.5 times upper limit of normal (≤ 5 times upper limit of normal for subjects with liver involvement of their cancer);
C. Serum creatinin ≤ 1.5 times upper limit of normal or a calculated creatinin clearance > 50 ml/min.
9. Signed informed consent must be obtained prior to any study specific procedures.
- Exclusion criteria1. Previous exposure to an anti-EGFR therapy;
2. Significant skin condition interfering with treatment;
3. Insulin dependency;
4. Pregnant or breast-feeding subjects. Women of childbearing potential must have a negative pregnancy test performed within 7 days of the start of treatment. Both men and women enrolled in this trial must agree to use adequate barrier birth control measures (e.g., cervical cap, condom, and diaphragm) during the course of the trial. Oral birth control methods alone will not be considered adequate on this study, because of the potential pharmacokinetic interaction between study drug and oral contraceptives. Concomitant use of oral and barrier contraceptives is advised. Contraception is necessary for at least 6 months after receiving study drug;
5. Concurrent anticancer chemotherapy, immunotherapy or investigational drug therapy during the study or within 4 weeks of the start of study drug;
6. Radiotherapy to the target lesions during study or within 4 weeks of the start of study drug. Palliative radiotherapy will be allowed;
7. Major surgery within 28 days of start of study drug;
8. Substance abuse, medical, psychological or social conditions that may interfere with the subjectís participation in the study or evaluation of the study results;
9. Any condition that is unstable or could jeopardize the safety of the subject and their compliance in the study.
- mec approval receivedyes
- multicenter trialyes
- randomisedyes
- masking/blindingNone
- controlNot applicable
- groupParallel
- TypeSingle arm
- Studytypeobservational
- planned startdate 30-dec-2011
- planned closingdate1-okt-2012
- Target number of participants25
- InterventionsPatients will be treated with cetuximab. For pharmacodynamic purposes PET-imaging with 89Zr-labelled cetuximab will be performed. In addition, two [18F-]-FDG PET-CT will be performed to explore early response. Patients will undergo blood sampling and two skin biopsies for pharmacodynamic purposes of 89Zr-labelled cetuximab and kinase activity profiles, respectively.
- Primary outcomeTo demonstrate uptake of 89Zr-cetuximab in non-hepatic tumor lesions using immuno-PET when administered during the loading dose of cetuximab.

Part two - Primary objective:
To investigate whether there is an association between uptake of cetuximab in non-hepatic tumor lesions and response according to RECIST 1.1 criteria.
- Secondary outcome1. To investigate whether there is an association between levels of uptake of 89Zr-cetuximab in the liver compared to levels of uptake in non-hepatic tumor lesions;
2. To explore whether the response observed on [18F]-FDG-PET can serve as an early response marker for future response to targeted therapy according to RECIST 1.1;
3. To explore whether there is an association between 89Zr-cetuximab uptake in non-hepatic tumor lesions, grade of skin toxicity and response according to RECIST 1.1.
- TimepointsThe detection of 89Zr-cetuximab uptake in non-hepatic tumor lesions (present/absent; present being defined as levels measured in ROIís > standard deviation of background +1).

Part two Ė Primary endpoint:
The % uptake (of total injected) 89Zr-cetuximab in non-hepatic tumor lesions as measured in ROIís corrected for background levels.

Part two - Secondary endpoints:
1. The % uptake (of total injected) 89Zr-cetuximab in liver lesions as measured in ROIís corrected for background levels;
2. [18F-]FDG PET measurements (SUVmax) before and after 4 weeks of treatment with cetuximab;
3. Grade of skin toxicity as measured by predefined criteria.
- Trial web siteN/A
- statusopen: patient inclusion
- CONTACT FOR PUBLIC QUERIES AriŽtte Clement
- CONTACT for SCIENTIFIC QUERIES AriŽtte Clement
- Sponsor/Initiator VU University Medical Center
- Funding
(Source(s) of Monetary or Material Support)
VU University Medical Center
- PublicationsN/A
- Brief summary3rd line standard treatment of patients with metastatic colorectal cancer (CRC) harboring K-ras wild type consists of anti-EGFR treatment with either cetuximab or panitumumab. This type of treatment has a modest but significant beneficial activity in this patient group with improved progression-free and overall survival. Although it is well known that patients with advanced CRC harboring a K-Ras mutation will not respond to anti-EGFR treatment, it is not understood why patients with K-Ras wild type CRC do not all benefit from this type of therapy. In order to optimize treatment of these patients as well as health care costs, it is extremely important to identify those patients who will respond to treatment with an EGFR inhibitor at an early stage.
We hypothesize that the differences in response to treatment with cetuximab are due to variability in the pharmacokinetics and -dynamics of the antibody. Thus, we hypothesize that patients who do not respond to anti-EGFR treatment, have insufficient drug levels in tumor tissue. We hypothesize that this is due to pharmacodynamic processes such as sequestration of cetuximab in the liver which expresses high levels of EGF receptor.
With the introduction of immuno-positron emission tomography (PET), an attractive novel option to visualize molecular interactions has been developed using the combination of PET with labeled mAbs. Cetuximab labeled with zirconium-89 (89Zr) has been successfully generated (GMP) and is available for this study. Previous studies have shown excellent stability of this compound and 89Zr is shown to be safe in humans. We will use 89Zr-cetuximab to demonstrate tumor targeting by imaging and explore the relation of uptake with treatment response. With this approach we hope to achieve a better understanding of the mechanisms of action of this therapeutic mAb in metastasized CRC and eventually develop strategies that may improve efficacy of cetuximab treatment.
- Main changes (audit trail)
- RECORD15-mei-2012 - 2-jun-2012


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