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Safety and response after peptide receptor radionuclide therapy with 177Lu‐DOTATATE for neuroendocrine tumors in phase 1/2 prospective Japanese trial.

Authors :
Kudo, Atsushi
Tateishi, Ukihide
Yoshimura, Ryoichi
Tsuchiya, Junichi
Yokoyama, Kota
Takano, Shoko
Kobayashi, Noritoshi
Utsunomiya, Daisuke
Hata, Masaharu
Ichikawa, Yasushi
Tanabe, Minoru
Hosono, Makoto
Kinuya, Seigo
Source :
Journal of Hepato -- Biliary -- Pancreatic Sciences; Apr2022, Vol. 29 Issue 4, p487-499, 13p
Publication Year :
2022

Abstract

Background: The present prospective phase 1/2 study aimed to elucidate the efficacy and safety of 177Lu‐DOTATATE (four cycles of 7.4 GBq) in Japanese patients with unresectable, progressive neuroendocrine tumors (NETs). Methods: From April 2018 to October 2020, 15 patients with advanced NETs (five midgut, eight pancreatic, and two lung NETs) were enrolled. Objective response rate (ORR), progression‐free survival (PFS), and adverse events (AEs) were evaluated. Pharmacokinetics and dosimetry were also evaluated in three midgut patients. Results: The mean absorbed doses of 177Lu‐DOTATATE to the kidneys (20.7 Gy/29.6 GBq) and the bone marrow (0.631 Gy/29.6 GBq) were within the radiation tolerance doses. The ORR of the whole population was 53% (90% CI, 30%‐76%). ORRs of the midgut and non‐midgut NETs were 60% (90% CI, 19%‐92%) and 50% (90% CI, 22%‐78%), respectively. There was no difference in the maximum reduction rate of the sum of the target lesion diameters between patients with midgut and non‐midgut NET. The median PFS was not reached; the PFS rate at 52 weeks was 80% (90% CI, 56.1%‐91.7%). AEs of Grade 3 or higher were lymphopenia (47%) and leukopenia (7%). Conclusion: 177Lu‐DOTATATE demonstrated remarkable tumor shrinkage and tolerability in Japanese patients with advanced NETs. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
18686974
Volume :
29
Issue :
4
Database :
Complementary Index
Journal :
Journal of Hepato -- Biliary -- Pancreatic Sciences
Publication Type :
Academic Journal
Accession number :
156583775
Full Text :
https://doi.org/10.1002/jhbp.1101