PuSH - Publication Server of Helmholtz Zentrum München: 177Lu-labeled MOv18 as compared to 131I- or 90Y-labeled MOv18 has the better therapeutic effect in eradication of alpha folate receptor-expressing tumor xenografts.

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Zacchetti, A.* ; Coliva, A.* ; Luison, E.* ; Seregni, E.* ; Bombardieri, E. ; Giussani, A. ; Figini, M.* ; Canevari, S.*

¹⁷⁷Lu-labeled MOv18 as compared to ¹³¹I- or ⁹⁰Y-labeled MOv18 has the better therapeutic effect in eradication of alpha folate receptor-expressing tumor xenografts.

Nucl. Med. Biol. 36, 759-770 (2009)

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Open Access Green as soon as Postprint is submitted to ZB.

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The mouse monoclonal antibody MOv18, directed against the alpha-isoform of folate receptor (FR), was investigated to identify the optimal radioconjugate for radioimmunotherapy of minimal residual disease in ovarian cancer. Methods: Pharmacokinetics, biodistribution, long-term therapeutic efficacy and toxicity of MOv18, labeled with the beta-emitters I-131, Y-90 and Lu-177, were compared in a xenografted mouse model, composed by two cell lines, A431FR and A431MK, differing only for FR expression. Results: A shorter blood clearance and a higher tumor uptake were observed for Y-90- and Lu-177- compared to I-131-MOv18, and a shorter blood pharmacokinetics was recorded in A431FR-bearing animals. At equitoxic maximum tolerable doses, the general irradiation by I-131- and Y-90-MOv18 gives rise to strong targeted effects on A431FR and nontargeted effects on A431MK tumors, while Lu-177-MOv18 was able to eradicate small size tumor masses expressing the antigen of interest exerting only mild non-targeted effects. Conclusion: Lu-177-MOv18 at the maximal tolerated dose is the immunoradioconjugate with the best therapeutic window in experimental conditions of small tumor volume.

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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

Keywords Ovarian cancer; Monoclonal antibody MOv18; Radioimmunotherapy; Radiometals; Folate Receptor; monoclonal-antibody MOV18; ovarian-cancer; nude-mice; colorectal-cancer; radioimmunotherapy; carcinoma; efficacy; binding; model; Y-90

ISSN (print) / ISBN 0969-8051

e-ISSN 0969-8051

Journal Nuclear Medicine and Biology

Quellenangaben Volume: 36, Issue: 7, Pages: 759-770

Publisher Elsevier

Publishing Place New York

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) Institute of Radiation Protection (ISS)