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Erschienen in: European Journal of Nuclear Medicine and Molecular Imaging 13/2022

09.07.2022 | Original Article

Anti-GD2 antibody for radiopharmaceutical imaging of osteosarcoma

verfasst von: Yingli Fu, Jing Yu, Ioanna Liatsou, Yong Du, Anders Josefsson, Jessie R. Nedrow, Hans Rindt, Jeffrey N. Bryan, Dara L. Kraitchman, George Sgouros

Erschienen in: European Journal of Nuclear Medicine and Molecular Imaging | Ausgabe 13/2022

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Abstract

Purpose

Osteosarcoma (OS) is the most frequently diagnosed bone cancer in children with little improvement in overall survival in the past decades. The high surface expression of disialoganglioside GD2 on OS tumors and restricted expression in normal tissues makes it an ideal target for anti-OS radiopharmaceuticals. Since human and canine OS share many biological and molecular features, spontaneously occurring OS in canines has been an ideal model for testing new imaging and treatment modalities for human translation. In this study, we evaluated a humanized anti-GD2 antibody, hu3F8, as a potential delivery vector for targeted radiopharmaceutical imaging of human and canine OS.

Methods

The cross-reactivity of hu3F8 with human and canine OS cells and tumors was examined by immunohistochemistry and flow cytometry. The hu3F8 was radiolabeled with indium-111, and the biodistribution of [111In]In-hu3F8 was assessed in tumor xenograft-bearing mice. The targeting ability of [111In]In-hu3F8 to metastatic OS was tested in spontaneous OS canines.

Results

The hu3F8 cross reacts with human and canine OS cells and canine OS tumors with high binding affinity. Biodistribution studies revealed selective uptake of [111In]In-hu3F8 in tumor tissue. SPECT/CT imaging of spontaneous OS canines demonstrated avid uptake of [111In]In-hu3F8 in all metastatic lesions. Immunohistochemistry confirmed the extensive binding of radiolabeled hu3F8 within both osseous and soft lesions.

Conclusion

This study demonstrates the feasibility of targeting GD2 on OS cells and spontaneous OS canine tumors using hu3F8-based radiopharmaceutical imaging. Its ability to deliver an imaging payload in a targeted manner supports the utility of hu3F8 for precision imaging of OS and potential future use in radiopharmaceutical therapy.
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Metadaten
Titel
Anti-GD2 antibody for radiopharmaceutical imaging of osteosarcoma
verfasst von
Yingli Fu
Jing Yu
Ioanna Liatsou
Yong Du
Anders Josefsson
Jessie R. Nedrow
Hans Rindt
Jeffrey N. Bryan
Dara L. Kraitchman
George Sgouros
Publikationsdatum
09.07.2022
Verlag
Springer Berlin Heidelberg
Erschienen in
European Journal of Nuclear Medicine and Molecular Imaging / Ausgabe 13/2022
Print ISSN: 1619-7070
Elektronische ISSN: 1619-7089
DOI
https://doi.org/10.1007/s00259-022-05888-5

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