Skip to main content
Top
Published in: European Journal of Nuclear Medicine and Molecular Imaging 2/2023

Open Access 15-10-2022 | Melanoma | Original Article

Enhanced antitumor immune responses via a new agent [131I]-labeled dual-target immunosuppressant

Authors: Chunjuan Jiang, Qiwei Tian, Xiaoping Xu, Panli Li, Simin He, Jian Chen, Bolin Yao, Jianping Zhang, Ziyi Yang, Shaoli Song

Published in: European Journal of Nuclear Medicine and Molecular Imaging | Issue 2/2023

Login to get access

Abstract

Radionuclides theranostic are ideal “partners” for bispecific antibodies to explore the immune response of patients and synergistic treatment. A bispecific single-domain antibody-Fc fusion protein, KN046, exhibits a good treatment effect by binding to programmed cell death-ligand 1 (PD-L1) and cytotoxic T-lymphocyte-associated protein 4 (CTLA-4). An ionizing-radiation stimulus mediated by a low-dose of [131I] may be used for immunopotentiation. In this study, we established [131I]-labeled KN046 as a novel radioimmunotherapy agent to treat malignant melanoma and explored the mechanism.

Methods

After intravenous injection of [131I]-KN046, SPECT/CT imaging was applied to identify candidate targets for KN046 immunotherapy. [18F]-FDG and [68 Ga]-NOTA-GZP (granzyme B-specific PET imaging agent) micro-PET/CT imaging was used to assess the immune response in vivo after [131I]-KN046 treatment. The synergistic treatment effect of [131I]-KN046 was evaluated by exploring the [131I]-based radionuclide-induced release of tumor immunogenicity-related antigens as well as the histology and survival of tumor-bearing mice after treatment.

Results

The constructed [131I]-KN046 exhibited high affinity and specificity for PD-L1/CTLA-4 immune targets and had excellent in vivo intratumoral retention capability so as to achieve good antitumor efficacy. More importantly, the combination of low-dose [131I] and KN046-enhanced immunosensitivity increased the immunotherapy response rates significantly. Exposure of tumor cells to [131I]-KN046 led to upregulated expression of MHC-I and Fas surface molecules and significant increases in the degree of T-cell activation and counts of tumor-infiltrating immunocytes.

Conclusion

Use of low-dose [131I] combined with a dual-target immunosuppressant could be exploited to identify the subset of treatment responders but also exhibited great potential for enhancing antitumor immune responses.
Appendix
Available only for authorised users
Literature
4.
5.
go back to reference Hodi FS, Chesney J, Pavlick AC, Robert C, Grossmann KF, McDermott DF, et al. Combined nivolumab and ipilimumab versus ipilimumab alone in patients with advanced melanoma: 2-year overall survival outcomes in a multicentre, randomised, controlled, phase 2 trial. Lancet Oncol. 2016;17:1558–68. https://doi.org/10.1016/S1470-2045(16)30366-7.CrossRef Hodi FS, Chesney J, Pavlick AC, Robert C, Grossmann KF, McDermott DF, et al. Combined nivolumab and ipilimumab versus ipilimumab alone in patients with advanced melanoma: 2-year overall survival outcomes in a multicentre, randomised, controlled, phase 2 trial. Lancet Oncol. 2016;17:1558–68. https://​doi.​org/​10.​1016/​S1470-2045(16)30366-7.CrossRef
9.
go back to reference Ballal S, Yadav MP, Kramer V, Moon ES, Roesch F, Tripathi M, et al. A theranostic approach of [(68)Ga]Ga-DOTA.SA.FAPi PET/CT-guided [(177)Lu]Lu-DOTA.SA.FAPi radionuclide therapy in an end-stage breast cancer patient: new frontier in targeted radionuclide therapy. Eur J Nucl Med Mol Imaging. 2021;48:942–4. https://doi.org/10.1007/s00259-020-04990-w.CrossRef Ballal S, Yadav MP, Kramer V, Moon ES, Roesch F, Tripathi M, et al. A theranostic approach of [(68)Ga]Ga-DOTA.SA.FAPi PET/CT-guided [(177)Lu]Lu-DOTA.SA.FAPi radionuclide therapy in an end-stage breast cancer patient: new frontier in targeted radionuclide therapy. Eur J Nucl Med Mol Imaging. 2021;48:942–4. https://​doi.​org/​10.​1007/​s00259-020-04990-w.CrossRef
12.
18.
21.
22.
go back to reference Jagodinsky JC, Jin WJ, Bates AM, Hernandez R, Grudzinski JJ, Marsh IR, et al. Temporal analysis of type 1 interferon activation in tumor cells following external beam radiotherapy or targeted radionuclide therapy. Theranostics. 2021;11:6120–37. https://doi.org/10.7150/thno.54881.CrossRef Jagodinsky JC, Jin WJ, Bates AM, Hernandez R, Grudzinski JJ, Marsh IR, et al. Temporal analysis of type 1 interferon activation in tumor cells following external beam radiotherapy or targeted radionuclide therapy. Theranostics. 2021;11:6120–37. https://​doi.​org/​10.​7150/​thno.​54881.CrossRef
30.
go back to reference Bubenik J. Tumour MHC class I downregulation and immunotherapy (Review). Oncol Rep. 2003;10:2005–8. Bubenik J. Tumour MHC class I downregulation and immunotherapy (Review). Oncol Rep. 2003;10:2005–8.
42.
Metadata
Title
Enhanced antitumor immune responses via a new agent [131I]-labeled dual-target immunosuppressant
Authors
Chunjuan Jiang
Qiwei Tian
Xiaoping Xu
Panli Li
Simin He
Jian Chen
Bolin Yao
Jianping Zhang
Ziyi Yang
Shaoli Song
Publication date
15-10-2022
Publisher
Springer Berlin Heidelberg
Keywords
Melanoma
Melanoma
Published in
European Journal of Nuclear Medicine and Molecular Imaging / Issue 2/2023
Print ISSN: 1619-7070
Electronic ISSN: 1619-7089
DOI
https://doi.org/10.1007/s00259-022-05986-4

Other articles of this Issue 2/2023

European Journal of Nuclear Medicine and Molecular Imaging 2/2023 Go to the issue