Abstract

Recombinant α1-microglobulin (A1M) is a proposed radioprotector during 177Lu-octreotate therapy of neuroendocrine tumors (NETs). To ensure a maintained therapeutic effect, we previously demonstrated that A1M does not affect the 177Lu-octreotate induced decrease in GOT1 tumor volume. However, the underlying biological events of these findings are still unknown. The aim of this work was to examine the regulation of apoptosis-related genes in GOT1 tumors short-time after i.v. administration of 177Lu-octreotate with and without A1M or A1M alone. Human GOT1 tumor-bearing mice received 30 MBq 177Lu-octreotate or 5 mg/kg A1M or co-treatment with both. Animals were sacrificed after 1 or 7 days. Gene expression analysis of apoptosis-related genes in GOT1 tissue was performed with RT-PCR. In general, similar expression patterns of pro- and anti-apoptotic genes were found after 177Lu-octreotate exposure with or without co-administration of A1M. The highest regulated genes in both irradiated groups compared to untreated controls were FAS and TNFSFRS10B. Administration of A1M alone only resulted in significantly regulated genes after 7 days. Co-administration of A1M did not negatively affect the transcriptional apoptotic response of 177Lu-octreotate in GOT1 tumors.

Details

Title
Co-administration with A1M does not influence apoptotic response of 177Lu-octreotate in GOT1 neuroendocrine tumors
Author
Rassol, Nishte 1 ; Andersson, Charlotte 1 ; Pettersson, Daniella 1 ; Al-Awar, Amin 1 ; Shubbar, Emman 1 ; Kovács, Anikó 2 ; Åkerström, Bo 3 ; Gram, Magnus 4 ; Helou, Khalil 5 ; Forssell-Aronsson, Eva 6 

 University of Gothenburg, Department of Medical Radiation Sciences, Institute of Clinical Sciences, Sahlgrenska Academy, Gothenburg, Sweden (GRID:grid.8761.8) (ISNI:0000 0000 9919 9582); University of Gothenburg, Sahlgrenska Center for Cancer Research, Sahlgrenska Academy, Gothenburg, Sweden (GRID:grid.8761.8) (ISNI:0000 0000 9919 9582) 
 Sahlgrenska University Hospital, Department of Clinical Pathology, Gothenburg, Sweden (GRID:grid.1649.a) (ISNI:000000009445082X) 
 Lund University, Department of Clinical Sciences, Infection Medicine, Lund, Sweden (GRID:grid.4514.4) (ISNI:0000 0001 0930 2361) 
 Lund University, Neonatology Unit, Department of Clinical Sciences, Pediatrics, Lund, Sweden (GRID:grid.4514.4) (ISNI:0000 0001 0930 2361) 
 University of Gothenburg, Sahlgrenska Center for Cancer Research, Sahlgrenska Academy, Gothenburg, Sweden (GRID:grid.8761.8) (ISNI:0000 0000 9919 9582); University of Gothenburg, Department of Oncology, Institute of Clinical Sciences, Sahlgrenska Academy, Gothenburg, Sweden (GRID:grid.8761.8) (ISNI:0000 0000 9919 9582) 
 University of Gothenburg, Department of Medical Radiation Sciences, Institute of Clinical Sciences, Sahlgrenska Academy, Gothenburg, Sweden (GRID:grid.8761.8) (ISNI:0000 0000 9919 9582); University of Gothenburg, Sahlgrenska Center for Cancer Research, Sahlgrenska Academy, Gothenburg, Sweden (GRID:grid.8761.8) (ISNI:0000 0000 9919 9582); Sahlgrenska University Hospital, Medical Physics and Biomedical Engineering, Gothenburg, Sweden (GRID:grid.1649.a) (ISNI:000000009445082X) 
Pages
6417
Publication year
2023
Publication date
2023
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2803144889
Copyright
© The Author(s) 2023. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.