Abstract Library

#4207 START-NET: Systemic Targeted Adaptive RadioTherapy of NeuroEndocrine Tumors – An open-label, multi-center, randomised phase III trial comparing safety and efficacy of personalised vs non-personalised radionuclide therapy with 177Lu-DOTATOC

Introduction: Peptide receptor radionuclide therapy (PRRT) with fixed activity dosing is an established treatment for advanced neuroendocrine tumors (NETs). Emerging data suggest that patients may benefit from a personalized treatment approach. Aggressive NET is believed to benefit from more intensive treatment, one example being FDG-PET positive tumors have shown benefit from combining PPRT with chemotherapy. Dosimetry is another means of achieving personalisation and can be used to increase the tumor radiation doses without surpassing the toxicity limits of organs at risk.

Conference:

Presenting Author: Asp P

Authors: Asp P, Sjögreen-Gleisner K, Fröss-Baron K, Sandström M, Hallqvist A,

Keywords: NET, PRRT, dosimetry, PET, 177Lu-DOTATOC, capecitabine,

#3813 First report of the phase I LuPARP trial assessing 177Lu-DOTATATE in combination with the PARP inhibitor olaparib in patients with somatostatin positive tumors

Introduction: Patients with metastatic somatostatin receptor positive tumors can be treated with peptide receptor radionuclide therapy (PRRT) with 177Lu-DOTATATE. However, all patients do not respond sufficiently, and further treatment optimization is highly warranted. We hypothesize that the tumoricidal effect could be increased by adding a PARP inhibitor which will decrease the ability of the tumor cells to repair DNA-damage, making them more sensitive to radiation and increase the probability of tumor cell death.

Conference:

Presenting Author: Hallqvist A

Authors: Hallqvist A, Sjögren M, Krantz T, Holgersson K, Svensson J,

Keywords: PRRT, 177Lu-DOTATATE, olaparib,