Abstract Library

#4630 Radiolabelled somatostatin receptor (SSTR) antagonist vs. agonist for peptide receptor radionuclide therapy (PPRT) in patients with SSTR positive neuroendocrine tumours – A retrospective basket study

Introduction: PRRT with lutetium-177 labelled somatostatin receptor (SSTR) agonists ([177Lu]Lu-DOTATATE or [177Lu]Lu-DOTATOC (177Lu-TOC) has limited response rate and durability. The SSTR antagonist [177Lu]Lu-DOTA-JR11 (177Lu-JR11) offers potentially increased tumour doses with better efficacy.

Conference:

Presenting Author: Eigler C

Authors: Eigler C, Mushaweh A, McDougall L, Bauman A, Christ E,

Keywords: Somatostatin Receptor, Neuroendocrine Tumour, DOTA-JR11, DOTA-TOC, Peptide Receptor Radionuclide Therapy,

#4619 Targeted beta- plus auger and conversion electron therapy with terbium-161 labelled somatostatin receptor antagonist DOTA-LM3 – BETA plus phase 0 study

Introduction: Radioligand therapy with lutetium-177 labelled somatostatin receptor (SSTR) agonists (177Lu-DOTATATE or 177Lu-DOTATOC) showed limited response rate and durability. The novel SSTR antagonist DOTA-LM3 labelled with terbium-161, which co-emits conversion and Auger electrons in addition to β- particles, potentially increasing tumour doses and offering a more effective treatment for micro metastases.

Conference:

Presenting Author: Fricke J

Authors: Fricke J, Westerbergh F, McDougall L, Christ E, Nicolas G,

Keywords: Radionuclide therapy, PRRT, Auger electrons, Conversion electrons, Terbium-161, radiolabelled somatostatin antagonist, neuroendocrine tumour,

#4615 Dosimetry, efficacy and safety of radiolabelled somatostatin receptor antagonist in patients with metastatic pheochromocytoma or paraganglioma

Introduction: Metastatic pheochromocytomas and paragangliomas (mPPGLs) are rare neuroendocrine tumours with a heterogenous phenotype and a variable treatment response. The SSTR antagonist [177Lu]Lu177Lu-DOTA-JR11 (177Lu-JR11) offers potentially increased tumour doses than standard radioligand therapy (RLT) with [177Lu]Lu-DOTA-TOC (177Lu-TOC).

Conference:

Presenting Author: Lider S

Authors: Lider Burciulescu S, Schmidt F, McDougall L, Bernhardt P, Mushaweh A,

Keywords: Metastatic PPGL, radioligand therapy, somatostatin receptor antagonist, dosimetry,

#4421 Head-to-head comparison of 18F-AlF-NOTA-JR11 PET/MR and 68Ga-DOTATATE PET/CT in patients with neuroendocrine tumours: A prospective study

Introduction: PET/MR combines the molecular advantages of PET with excellent morphologic and anatomic delineation of MRI.18F-AlF-NOTA-JR11, a novel SSTR antagonist with a high affinity for SSTR2, has the potential to perform better than SSTR agonists in neuroendocrine tumour imaging.

Conference:

Presenting Author: Yu J

Authors: Jin X, Xie Q, Lu M, Li J, Yang Z,

Keywords: neuroendocrine tumour, PET/MR, SSTR antagonist, 18F-AlF-NOTA-JR11,

#4051 TECANT ERA PerMed study – Somatostatin receptor antagonists as a new sensitive diagnostic tool for reliable assessment of the SSTR status in neuroendocrine neoplasms

Introduction: The radiolabelled somatostatin receptors (SSTR) agonist development was a milestone in the management of neuroendocrine tumors (NEN), however the SSTR antagonist recognize more binding sites on NEN cells which should improve the diagnostic efficacy. The development of technetium-99m based radiopharmaceuticals should improve access to this clinically feasible diagnostic tool.

Conference:

Presenting Author: Opalinska M

Authors: Opalinska M, Virgolini I, Lezaic L, Decristoforo C, Kolenc P,

Keywords: NET, SSTR antagonist, SPECT/CT, SSTR, TECANT, [99mTc]Tc-TECANT1,