Improved radiosynthesis of (123)I-MAPi, an auger theranostic agent Journal Article
| Authors: | Wilson, T. C.; Jannetti, S. A.; Guru, N.; Pillarsetty, N.; Reiner, T.; Pirovano, G. |
| Article Title: | Improved radiosynthesis of (123)I-MAPi, an auger theranostic agent |
| Abstract: | Purpose: 123I-MAPi, a novel PARP1-targeted Auger radiotherapeutic has shown promising results in pre-clinical glioma model. Currently, 123I-MAPi is synthesized using multistep synthesis that results in modest yields and low molar activities (MA) that limits the ability to translate this technology for human studies where high doses are administered. Therefore, new methods are needed to synthesize 123I-MAPi in high activity yields (AY) and improved MA to facilitate clinical translation and multicenter trials. Materials and methods: 123I-MAPi was prepared in a single step via 123I-iododetannylation of the corresponding tributylstannane precursor. In vitro internalization assay, subcellular fractionation and confocal microscopy where used to evaluate the performance of 123I-MAPi in a small cell lung cancer model. Results: 123I-MAPi was synthesized in a single step from the corresponding stannane precursor in AY of 45 ± 2% and MA of 11.8 ± 4.8 GBq μmol−1. In vitro in LX22 cells showed rapid internalization (5 min) with accumulation found predominantly in the membrane, nucleus and chromatin of the cell as determined by subcellular fractionation. Conclusions: Here, we have developed an improved radiosynthesis of 123I-MAPi, an Auger theranostic agent. This process was achieved using a single step, 123I-iododestannylation reaction from the corresponding stannane precursor in good AY and MA. 123I-MAPi was evaluated in vitro in a small cell lung cancer model with high PARP expression, rapid internalization and high nuclear uptake shown. © Copyright © 2020 The Author(s). Published with license by Taylor & Francis Group, LLC. |
| Keywords: | lung neoplasms; radiotherapy; lung tumor; electrons; electron; personalized medicine; small cell lung cancer; small cell lung carcinoma; theranostics; parp; humans; human; precision medicine; iodine-123; auger emitters; stannane |
| Journal Title: | International Journal of Radiation Biology |
| Volume: | 99 |
| Issue: | 1 |
| ISSN: | 0955-3002 |
| Publisher: | Taylor & Francis Group Ltd. |
| Date Published: | 2023-01-01 |
| Start Page: | 70 |
| End Page: | 76 |
| Language: | English |
| DOI: | 10.1080/09553002.2020.1781283 |
| PUBMED: | 32552309 |
| PROVIDER: | scopus |
| PMCID: | PMC7775866 |
| DOI/URL: | |
| Notes: | The MSK Cancer Center Support Grant (P30 CA008748) is acknowledged in the PDF -- Corresponding author is MSK author: Giacomo Pirovano -- Source: Scopus |
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