Abstract
Photodynamic therapy (PDT) has a great therapeutic potential because it induces local cellular cytotoxicity upon application of a laser light that excites a photosensitizer, leading to toxic reactive oxygen species. Nevertheless, PDT still is underutilized in the clinic, mostly because of damage induced to normal surrounding tissues. Efforts have been made to improve the specificity. Nanobody-targeted PDT is one of such approaches, in which the variable domain of heavy-chain antibodies, i.e., nanobodies, are used to target photosensitizers selectively to cancer cells. In vitro studies are certainly very valuable to evaluate the therapeutic potential of PDT approaches, but many aspects such as bio-distribution of the photosensitizers, penetration through tissues, and clearance are not taken into account. In vivo studies are therefore essential to assess the influence of such factors, in order to gain more insights into the therapeutic potential of a treatment under development. This chapter describes the development of an orthotopic model of head and neck cancer, to which nanobody-targeted PDT is applied, and the therapeutic potential is assessed by immunohistochemistry one day after PDT.
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Acknowledgments
The work described here received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (grant agreement No. 677582).
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van Driel, P.B.A.A., Keereweer, S., Lowik, C.W.G.M., Oliveira, S. (2022). Investigation of the Therapeutic Potential of Nanobody-Targeted Photodynamic Therapy in an Orthotopic Head and Neck Cancer Model. In: Broekgaarden, M., Zhang, H., Korbelik, M., Hamblin, M.R., Heger, M. (eds) Photodynamic Therapy. Methods in Molecular Biology, vol 2451. Humana, New York, NY. https://doi.org/10.1007/978-1-0716-2099-1_24
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DOI: https://doi.org/10.1007/978-1-0716-2099-1_24
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