Cited by 112Neuroendocrine Tumor Research AdvancesRadiopharmaceutical Chemistry and ApplicationsMedical Imaging Techniques and Applications

Phase I Trial of Well-Differentiated Neuroendocrine Tumors (NETs) with Radiolabeled Somatostatin Antagonist 177Lu-Satoreotide Tetraxetan.

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Reidy-Lagunes, Diane, Pandit-Taskar, Neeta, O'Donoghue, Joseph A., Krebs, Simone, Staton, Kevin D., Lyashchenko, Serge K., Lewis, Jason S., Raj, Nitya +4 more·2019·Clinical Cancer Research

Published version of a preprint

Abstract

Abstract Purpose: Radiolabeled somatostatin receptor 2 (SSTR2) antagonists have shown higher tumor uptake and tumor-to-organ ratios than somatostatin agonists in preclinical models of neuroendocrine tumors (NETs). We performed a phase I study to evaluate the safety and efficacy of SSTR2 antagonist 177Lu-satoreotide tetraxetan. Patients and Methods: Twenty patients with advanced SSTR2-positive NETs were treated with 177Lu-satoreotide tetraxetan. Patients first underwent a dosimetry study with 177Lu-satoreotide tetraxetan to determine the therapeutic activity that could be safely administered. This activity was split into two equal cycles to be delivered 3 months apart. The maximum activity was 7.4 GBq per cycle. Results: Of 20 patients with NETs (one lung, seven small bowel, nine pancreatic, one gastric, one rectal, one kidney; mean prior treatments: three), six received one cycle of 177Lu- satoreotide tetraxetan and 14 received two cycles. Hematologic toxicity after cycle 1 was mild-moderate and reversed before cycle 2. However, grade 4 hematologic toxicity occurred in four of seven (57%) patients after cycle 2 of 177Lu-satoreotide tetraxetan. The study was suspended, and the protocol modified to limit the cumulative absorbed bone marrow dose to 1 Gy and to reduce prescribed activity for cycle 2 by 50%. The best overall response rate was 45% [5% complete response (1/20), 40% partial response (8/20)]; with 40% stable disease (8/20) and 15% progression of disease (3/20). Median progression-free survival (PFS) was 21.0 months (95% CI, 13.6–NR). Conclusions: In this trial of heavily treated NETs, preliminary data are promising for the use of 177Lu-satoreotide tetraxetan. Additional studies are ongoing to determine optimal therapeutic dose/schedule.

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Authors
Reidy-Lagunes, D., Pandit-Taskar, N., O'Donoghue, J. A., Krebs, S., Staton, K. D., Lyashchenko, S. K., Lewis, J. S., Raj, N., Gönen, M., Lohrmann, C., Bodei, L., & Weber, W. A.
Affiliations
  • 1Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York.
  • Memorial Sloan Kettering Cancer Center (US)
  • 3Department of Medical Physics, Memorial Sloan Kettering Cancer Center, New York, New York.
Venue
Clinical Cancer Research
Published
2019-12-01
Volume
25
Issue
23
Pages
6939-6947
ISSN
  • 1078-0432 (ISSN-L)
  • 1557-3265
OpenAlex
W2969596297
Cited by
112
References
34
Citations by year
2026: 17 · 2025: 14 · 2024: 15 · 2023: 16 · 2022: 23 · 2021: 14 · 2020: 11 · 2019: 2
FWCI
9.52
Type
journal article
Language
en
Open access
Locations
  • Clinical Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • mediaTUM – the media and publications repository of the Technical University Munich (Technical University Munich) (submittedVersion)
Funders
NIH NCI (P30 CA008748, K12 CA184746)
Topics
  • Health Sciences › Medicine › Epidemiology › Neuroendocrine Tumor Research Advances
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Radiopharmaceutical Chemistry and Applications
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Medical Imaging Techniques and Applications
Keywords
well-differentiated neuroendocrine tumors, radiolabeled somatostatin analogs, peptide receptor radionuclide therapy, dosimetry, hematologic toxicity, bone marrow dose, progression-free survival, treatment efficacy and safety
MeSH terms
Adult, Aged, Chelating Agents, Female, Follow-Up Studies, Heterocyclic Compounds, 1-Ring, Humans, Lutetium, Male, Middle Aged, Neoplasm Metastasis, Prognosis, Radioisotopes, Octreotide, Receptors, Somatostatin, Neuroendocrine Tumors, Radiopharmaceuticals, Young Adult

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