Leszek Królicki1, Frank Bruchertseifer2, Jolanta Kunikowska3, Henryk Koziara4, Bartosz Królicki4, Maciej Jakuciński5, Dariusz Pawlak6, Christos Apostolidis2, Saed Mirzadeh7, Rafał Rola8, Adrian Merlo9, Alfred Morgenstern2. 1. Nuclear Medicine Department, Medical University of Warsaw, ul. Banacha 1 a, 02-097, Warsaw, Poland. 2. European Commission, Joint Research Centre, Directorate for Nuclear Safety and Security, Karlsruhe, Germany. 3. Nuclear Medicine Department, Medical University of Warsaw, ul. Banacha 1 a, 02-097, Warsaw, Poland. jolanta.kunikowska@wum.edu.pl. 4. Department of Neurosurgery, Institute of Psychiatry and Neurology, Warsaw, Poland. 5. Department of Nuclear Medicine, Brodnowski Hospital, Warsaw, Poland. 6. Radioisotope Centre POLATOM, National Centre for Nuclear Research, Otwock, Poland. 7. Nuclear and Radiochemistry Group, Nuclear Security and Isotope Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 38731-6229, USA. 8. Department of Neurology, Military Institute of Aviation Medicine, Warsaw, Poland. 9. Neurosurgery, Bern and University of Basel, Spitalgasse 32, Basel, Switzerland.
Abstract
Treatment options for recurrent glioblastoma multiforme (GBM) are very limited. GBM cells express high levels of the GPCR neurokinin type 1 receptor (NK-1R), and a modified substance P can be used as its ligand for the tumor cell targeting. Targeted alpha therapy with DOTA-Substance P labeled with the short range alpha emitter 213Bi allows for selective irradiation and killing of tumor cells. MATERIAL AND METHODS: Twenty patients with recurrent GBM were included into the study following a standard therapy. 1-2 intracavitary or intratumoral port-a-cath systems were stereotactically inserted. Patients were treated with 1-7 doses of 213Bi-DOTA-Substance P (213Bi-DOTA-SP) in 2-month intervals. 68Ga-DOTA-Substance P (68Ga-DOTA-SP) was co-injected with 213Bi-DOTA-SP to assess the biodistribution using PET/CT. Therapeutic response was monitored with performance status and MRI imaging. RESULTS: Treatment with activity up to 11.2 GBq 213Bi-DOTA-SP was well tolerated with only mild and transient adverse reactions. The median progression free survival was 2.7 months. The median overall survival from the first diagnosis was 23.6 months and median survival after recurrence was 10.9 months. The median survival time from the start of 213Bi-DOTA-SP was 7.5 months. CONCLUSIONS: Treatment of recurrent GBM with 213Bi-DOTA-SP is safe and well tolerated. The median overall survival after recurrence of 10.9 months compares favorably to the available alternative treatment options. Once the supply of high activity 225Ac/213Bi radionuclide generators is secured, targeted alpha therapy with 213Bi-DOTA-SP may evolve as a promising novel option to treat recurrent GBM.
Treatment options for recurrent glioblastoma multiforme (GBM) are very limited. GBM cells express high levels of the GPCR neurokinin type 1 receptor (NK-1R), and a modified substance P can be used as its ligand for the tumor cell targeting. Targeted alpha therapy with DOTA-Substance P labeled with the short range alpha emitter 213Bi allows for selective irradiation and killing of tumor cells. MATERIAL AND METHODS: Twenty patients with recurrent GBM were included into the study following a standard therapy. 1-2 intracavitary or intratumoral port-a-cath systems were stereotactically inserted. Patients were treated with 1-7 doses of 213Bi-DOTA-Substance P (213Bi-DOTA-SP) in 2-month intervals. 68Ga-DOTA-Substance P (68Ga-DOTA-SP) was co-injected with 213Bi-DOTA-SP to assess the biodistribution using PET/CT. Therapeutic response was monitored with performance status and MRI imaging. RESULTS: Treatment with activity up to 11.2 GBq 213Bi-DOTA-SP was well tolerated with only mild and transient adverse reactions. The median progression free survival was 2.7 months. The median overall survival from the first diagnosis was 23.6 months and median survival after recurrence was 10.9 months. The median survival time from the start of 213Bi-DOTA-SP was 7.5 months. CONCLUSIONS: Treatment of recurrent GBM with 213Bi-DOTA-SP is safe and well tolerated. The median overall survival after recurrence of 10.9 months compares favorably to the available alternative treatment options. Once the supply of high activity 225Ac/213Bi radionuclide generators is secured, targeted alpha therapy with 213Bi-DOTA-SP may evolve as a promising novel option to treat recurrent GBM.
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