Evaluation of a New Radiotracer (64Cu-DOTA-AE105) for Diagnosing Aggressive Cancer With Positron Emission Tomography

Evaluation of a New Radiotracer (64Cu-DOTA-AE105) for Diagnosing Aggressive Cancer With Positron Emission Tomography

64Cu-DOTA-AE105. Evaluation of a New Radiotracer Targeting uPAR (Urokinase Plasminogen Activator Receptor) for Positron Emission Tomography Imaging of the Invasive Cancer Phenotype. First in Man.

The primary objective of the study is to test a new radiotracer called 64Cu-DOTA-AE105 for PET imaging of uPAR (urokinase plasminogen activator receptor). The tracer has the potential of identifying the invasive cancer phenotype, thereby distinguishing between aggressive and less aggressive tumors. This is a first in human study to test the radiotracer in cancer patients. The biodistribution and tumor uptake will be evaluated by repeated PET imaging (1,3 and 24 hours post injection).

The primary objective of the study is to test a new radiotracer called 64Cu-DOTA-AE105 for PET imaging of uPAR (urokinase plasminogen activator receptor). The tracer has the potential of identifying the invasive cancer phenotype, thereby distinguishing between aggressive and less aggressive tumors. This is a first in human study to test the radiotracer in cancer patients. The biodistribution and tumor uptake will be evaluated by repeated PET imaging (1,3 and 24 hours post injection). The primary end points are Biodistribution and dosimetry of 64Cu-DOTA-AE105. In addition, the quantitative uptake of 64Cu-DOTA-AE105 in tumors and expression of uPAR in tumor tissue obtained by surgery or biopsies (either 14 days before (only biopsies) or after the PET scans) will be compared to validate the image-derived data on UPAR expression

Positron Emission Tomography, Uroplasminogen Plasminogen Activator Receptor, Breast cancer, Prostate cancer, Urinary bladder cancer, Biodistribution, Radiation exposure

One injection of 64-Cu-DOTA-AE105 (app. 200 Mbq IV) followed by 3 PET scans 1,3 and 24 hours post injection

One injection of 64Cu-DOTA-AE105 (app. 200 Mbq) followed by Positron Emission Tomography Scan 1, 3 and 24 hours post injection

The patients will be PET scanned 1, 3 and 24 hours post injection of the radiotracer 64Cu-DOTA-AE105. These different timepoints will be used for assessment of biodistribution

The patients will be PET scanned 1, 3 and 24 hours post injection of the radiotracer 64Cu-DOTA-AE105. These different timepoints will be used for calculation of dosimetry

Tumor uptake of 64Cu-DOTA-AE105 will be compared with expression of uPAR (using immunohistochemistry and ELISA) in tumor tissue obtained from biopsies/or operative removal of the tumors.

The patients will be PET scanned 1, 3 and 24 hours post injection of the radiotracer 64Cu-DOTA-AE105. These different timepoints will be used for assessment of tumor uptake of 64Cu-DOTA-AE105 will be assessed by PET scans 1, 3 and 24 hours post injection

Inclusion Criteria: clinical diagnosis of cancer of prostate, breast or urinary bladder capable of understanding and giving full informed consent Exclusion Criteria: pregnancy lactation contraindication for the use of intravenous CT contrast-agencies claustrophobia other current/or former diagnosed cancers, except non melanoma skin cancer or carcinoma in situ cervicis uteri

Persson M, Madsen J, Ostergaard S, Jensen MM, Jorgensen JT, Juhl K, Lehmann C, Ploug M, Kjaer A. Quantitative PET of human urokinase-type plasminogen activator receptor with 64Cu-DOTA-AE105: implications for visualizing cancer invasion. J Nucl Med. 2012 Jan;53(1):138-45. doi: 10.2967/jnumed.110.083386.