Comparison of Immuno-PET of CD138 and PET imaging with 64 CuCl 2 and 18 F-FDG in a preclinical syngeneic model of multiple myeloma

Although recent data from the literature suggest that PET imaging with [18]-Fluorodeoxyglucose ( F-FDG) is a promising technique in multiple myeloma (MM), the development of other radiopharmaceuticals seems relevant. CD138 is currently used as a standard marker in many laboratories for the identific...

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Published inOncotarget Vol. 9; no. 10; p. 9061
Main Authors Bailly, Clément, Gouard, Sébastien, Lacombe, Marie, Remaud-Le Saëc, Patricia, Chalopin, Benjamin, Bourgeois, Mickaël, Chouin, Nicolas, Tripier, Raphaël, Halime, Zakaria, Haddad, Ferid, Faivre-Chauvet, Alain, Kraeber-Bodéré, Françoise, Chérel, Michel, Bodet-Milin, Caroline
Format Journal Article
LanguageEnglish
Published United States 06.02.2018
Subjects
multiple myeloma
copper-64
syngeneic model
murine CD138
immuno-PET
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Summary:Although recent data from the literature suggest that PET imaging with [18]-Fluorodeoxyglucose ( F-FDG) is a promising technique in multiple myeloma (MM), the development of other radiopharmaceuticals seems relevant. CD138 is currently used as a standard marker in many laboratories for the identification and purification of myeloma cells, and could be used in phenotype tumor imaging. In this study, we evaluated a Cu-labeled anti-CD138 murine antibody ( Cu-TE2A-9E7.4) and a metabolic tracer ( CuCl ) for PET imaging in a MM syngeneic mouse model. Cu-TE2A-9E7.4 antibody and CuCl2 were evaluated via PET imaging and biodistribution studies in C57BL / KaLwRij mice bearing either 5T33-MM subcutaneous tumors or bone lesions. These results were compared to 18F-FDG-PET imaging. Autoradiography and histology of representative tumors were secondly conducted. In biodistribution and PET studies, Cu-TE2A-9E7.4 displayed good tumor uptake of subcutaneous and intra-medullary lesions, greater than that demonstrated with F-FDG-PET. In control experiments, only low-level, non-specific uptake of Cu-labeled isotype IgG was observed in tumors. Similarly, low activity concentrations of CuCl were accumulated in MM lesions. Histopathologic analysis of the immuno-PET-positive lesions revealed the presence of plasma cell infiltrates within the bone marrow. Cu-labeled anti-CD138 antibody can detect subcutaneous MM tumors and bone marrow lesions with high sensitivity, outperforming F-FDG-PET and CuCl in this preclinical model. These data support Cu-anti-CD138 antibody as a specific and promising new imaging radiopharmaceutical agent in MM.
ISSN:1949-2553