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Purpose: Molecular radiotherapy is a treatment modality that is highly suitable for targeting micrometastases and [Lu]Lu-DOTATATE is currently being explored as a potential novel treatment option for high-risk neuroblastoma. p53 is a key player in the proapoptotic signalling in response to radiation-induced DNA damage and is therefore a potential target for radiosensitisation.
Methods: This study investigated the use of the p53 stabilising peptide VIP116 and [Lu]Lu-DOTATATE, either alone or in combination, for treatment of neuroblastoma tumour xenografts in mice. Initially, the uptake of [Lu]Lu-DOTATATE in the tumours was confirmed, and the efficacy of VIP116 as a monotherapy was evaluated. Subsequently, mice with neuroblastoma tumour xenografts were treated with placebo, VIP116, [Lu]Lu-DOTATATE or a combination of both agents.
Results: The results demonstrated that monotherapy with either VIP116 or [Lu]Lu-DOTATATE significantly prolonged median survival compared to the placebo group (90 and 96.5 days vs. 50.5 days, respectively). Notably, the combination treatment further improved median survival to over 120 days. Furthermore, the combination group exhibited the highest percentage of complete remission, corresponding to a twofold increase compared to the placebo group. Importantly, none of the treatments induced significant nephrotoxicity. Additionally, the therapies affected various molecular targets involved in critical processes such as apoptosis, hypoxia and angiogenesis.
Conclusion: In conclusion, the combination of VIP116 and [Lu]Lu-DOTATATE presents a promising novel treatment approach for neuroblastoma. These findings hold potential to advance research efforts towards a potential cure for this vulnerable patient population.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10796565 | PMC |
http://dx.doi.org/10.1007/s00259-023-06462-3 | DOI Listing |
Eur J Nucl Med Mol Imaging
February 2024
Department of Immunology, Genetics and Pathology, Rudbeck Laboratory, Uppsala University, SE-751 85, Uppsala, Sweden.
Purpose: Molecular radiotherapy is a treatment modality that is highly suitable for targeting micrometastases and [Lu]Lu-DOTATATE is currently being explored as a potential novel treatment option for high-risk neuroblastoma. p53 is a key player in the proapoptotic signalling in response to radiation-induced DNA damage and is therefore a potential target for radiosensitisation.
Methods: This study investigated the use of the p53 stabilising peptide VIP116 and [Lu]Lu-DOTATATE, either alone or in combination, for treatment of neuroblastoma tumour xenografts in mice.
Biomolecules
November 2021
Department of Immunology, Genetics and Pathology, Uppsala University, SE-751 85 Uppsala, Sweden.
p53 is involved in DNA damage response and is an exciting target for radiosensitization in cancer. Targeted radionuclide therapy against somatostatin receptors with Lu-DOTATATE is currently being explored as a treatment for neuroblastoma. The aim of this study was to investigate the novel p53-stabilizing peptide VIP116 in neuroblastoma, both as monotherapy and together with Lu-DOTATATE.
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