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Intraoperative tumor-specific fluorescence imaging in ovarian cancer by folate receptor-α targeting: first in-human results

Abstract

The prognosis in advanced-stage ovarian cancer remains poor. Tumor-specific intraoperative fluorescence imaging may improve staging and debulking efforts in cytoreductive surgery and thereby improve prognosis. The overexpression of folate receptor-α (FR-α) in 90–95% of epithelial ovarian cancers prompted the investigation of intraoperative tumor-specific fluorescence imaging in ovarian cancer surgery using an FR-α–targeted fluorescent agent. In patients with ovarian cancer, intraoperative tumor-specific fluorescence imaging with an FR-α–targeted fluorescent agent showcased the potential applications in patients with ovarian cancer for improved intraoperative staging and more radical cytoreductive surgery.

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Figure 1: The tumor-specific fluorescent agent folate-FITC.
Figure 2: Intra-operative multispectral imaging system.
Figure 3: Quantification of tumor deposits ex vivo.
Figure 4: Microphotographs of different ovarian tumors.

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Acknowledgements

The authors wish to thank W. Sluiter for help with statistical analyses, I. Wesselman for training the operating room personnel in using the camera system and B. Molmans (Department of Hospital Pharmacy, University Medical Center Groningen) for pharmaceutical expertise and support. Monoclonal antibody mAb343 was kindly provided by W. Franklin (University of Colorado Health Science Center).

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Authors and Affiliations

Authors

Contributions

G.M.v.D. supervised the project, designed and performed the study, interpreted data and wrote the manuscript. G.T. designed the camera system, performed the study, interpreted data with technical and computer analyses support and wrote the manuscript. L.M.A.C. designed and performed the study, interpreted data and wrote the manuscript. N.J.H. performed the study and interpreted data. R.G.P. performed the study and interpreted data. W.K. performed the study and interpreted data. A.S. designed the camera system, performed the study and interpreted data with technical and computer analysis support. J.S.d.J. performed the study and interpreted data. H.J.G.A. designed and performed the study, interpreted data and wrote the manuscript. A.G.J.v.d.Z. designed and performed the study, interpreted data and wrote the manuscript. J.B. designed and performed the study, interpreted data, performed the pathology analyses and wrote the manuscript. P.S.L. designed and performed the study, and interpreted data. V.N. supervised the project, designed and performed the study, designed and provided the camera system and interpreted data, and wrote the manuscript.

Corresponding authors

Correspondence to Gooitzen M van Dam or Vasilis Ntziachristos.

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The authors declare no competing financial interests.

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Supplementary Text and Figures

Supplementary Figure 1 and Supplementary Methods (PDF 220 kb)

Supplementary Video 1

Intraoperative application of the multispectral intraoperative fluorescence camera system (MOV 35948 kb)

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van Dam, G., Themelis, G., Crane, L. et al. Intraoperative tumor-specific fluorescence imaging in ovarian cancer by folate receptor-α targeting: first in-human results. Nat Med 17, 1315–1319 (2011). https://doi.org/10.1038/nm.2472

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