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- Is éard atá i gceist leis an chóireáil ailse ar a dtugtar Fóta-imdhíon-teiripe ná othair a instealladh le hoibreán, agus ansin a gcuid siadaí a nochtadh do sholas neas-infridhearg. D'fhorbair taighdeoir Seapánach é nuair a bhí se ag obair ag Institiúidí Sláinte Náisiúnta SAM. Ba í an tSeapáin an chéad tír a d’úsáid an chóireáil seo ar othar sa bhliain 2021. Bíonn antasubstaint dírithe go sonrach ar ailse san oibreán a instealladh, a bhfuil ceimiceáin speisialta ceangailte leo. Tar éis do na antasubstaintí ceangal le hailse, lonraítear solas infridhearg orthu, rud a mharaíonn na cealla ailse. (ga)
- Photoimmunotherapy (PIT) is an oncological treatment that combines photodynamic therapy of tumor with immunotherapy treatment. Combining photodynamic therapy with immunotherapy enhances the immunostimulating response and has synergistic effects for metastatic cancer treatment. PIT is type of molecular targeted cancer therapy, which allows the selective destruction of cancer cells without any damage to normal tissues. It is a light-based cancer therapy, which was developed and pioneered by Professor Julia Levy and colleagues at the University of British Columbia, Canada, in 1983. Professor Julia Levy's research has also been pivotal in the clinical approval of Visudyne and Photofrin. Over the last 35 years, PIT has been studied extensively in vitro and in vivo by numerous research teams all over the world. More recently, significant strides in PIT have been made by Professor Kobayashi and his colleagues at National Cancer Institute, Bethesda, Maryland. Conventional photodynamic therapy (PDT) uses a non-specific photosensitizer which can be activated by a non-ionizing light to kill cancer cells. Photosensitizers are molecules that rapidly destroy cells though the production of reactive oxygen species (ROS) when exposed to light at specific wavelength. However, this PDT treatment results in serious side effects because non-targeted photosensitizers are also taken up by normal tissues. PIT treatment avoids the side effects problem through the creation of a targeted-photosensitizer, which involves two components: a monoclonal antibody (mAb) which recognizes specific proteins on the surface of cancer cells, and a non-targeted photosensitizer. Even though the new mAb-based photosensitizers are distributed throughout the body, it can be activated by light for targeted PIT only when bound to specific proteins on cancer cellular membrane. PIT has been previously published using a vast number of photosensitizers, such as porphyrins, and phthalocyanine dyes. The research team at Professor Kobayashi’s lab coupled anti-tumor antibodies targeting human epidermal growth factor receptors to a water soluble phthalocyanine dye, IRDye 700DX, which is activated by near-infrared light. IRDye 700DX was chosen for its hydrophilicity and strong cytotoxicity induced upon association with the cellular membrane and subsequent activation. A variety of cancers, such as breast and pancreatic cancers over-express epidermal growth factor receptors. This new photosensitizing compound utilizing IRDye 700DX NHS Ester was referred to as "mAb-IR700 conjugates". In Vitro studies showed that mAb-IR700 killed tumor cells seconds after the near-infrared light irradiation. There was also a positive correlation between the intensity of excitation light and percentage of cell death. Infrared light alone or mAb-IR700 conjugate alone did not cause any damage to normal cells. When tumor-xenografted mice were treated with mAb-IR700 and near-infrared light, significant tumor shrinkage was observed. With fractionated administration of mAB–IR700 conjugate followed by systematic repeated NIR light irradiation to the tumor, 80 percent of tumor cells were eradicated and the mice’s survival were significantly prolonged. Based on the current hypothesis, cell death induced by PIT was caused by rapid expansion of local water upon the formation of holes in the membrane. Another desirable feature of PIT using mAb-IR700 conjugate is that it also emits fluorescence light upon activation. Therefore before PIT, mAb-IR700 can be administered at a lower dosage to guide the application of excitation light to tumor tissues, further minimizing unnecessary light exposure to surrounding tissues. PIT is a promising highly selective and clinically feasible therapeutic method for treatment of mAb-binding tumors with minimal off-target effects. For future directions, researchers are trying to conjugate a variety of other monoclonal antibodies to phthalocyanine, creating a highly flexible therapeutic platform. (en)
- 光免疫療法（ひかりめんえきりょうほう、英: Photoimmunotherapy）は、癌（がん）に対して、光線力学療法と免疫療法を組み合わせた、開発中の新たな治療法の候補の一つである。2015年4月にアメリカ食品医薬品局（FDA）から臨床試験開始許可を受け、現在は臨床第3相試験を実施中。光免疫療法に使われる医薬品の第一号が2020年に日本において製造販売の承認を得ている。 略称PITまたは近赤外光線免疫療法（NIR-PIT）とも呼ばれる。 抗がん剤（化学療法）、手術、放射線療法、がん免疫薬に続く第5のがん治療法とも位置付けられる。 (ja)
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- Is éard atá i gceist leis an chóireáil ailse ar a dtugtar Fóta-imdhíon-teiripe ná othair a instealladh le hoibreán, agus ansin a gcuid siadaí a nochtadh do sholas neas-infridhearg. D'fhorbair taighdeoir Seapánach é nuair a bhí se ag obair ag Institiúidí Sláinte Náisiúnta SAM. Ba í an tSeapáin an chéad tír a d’úsáid an chóireáil seo ar othar sa bhliain 2021. Bíonn antasubstaint dírithe go sonrach ar ailse san oibreán a instealladh, a bhfuil ceimiceáin speisialta ceangailte leo. Tar éis do na antasubstaintí ceangal le hailse, lonraítear solas infridhearg orthu, rud a mharaíonn na cealla ailse. (ga)
- 光免疫療法（ひかりめんえきりょうほう、英: Photoimmunotherapy）は、癌（がん）に対して、光線力学療法と免疫療法を組み合わせた、開発中の新たな治療法の候補の一つである。2015年4月にアメリカ食品医薬品局（FDA）から臨床試験開始許可を受け、現在は臨床第3相試験を実施中。光免疫療法に使われる医薬品の第一号が2020年に日本において製造販売の承認を得ている。 略称PITまたは近赤外光線免疫療法（NIR-PIT）とも呼ばれる。 抗がん剤（化学療法）、手術、放射線療法、がん免疫薬に続く第5のがん治療法とも位置付けられる。 (ja)
- Photoimmunotherapy (PIT) is an oncological treatment that combines photodynamic therapy of tumor with immunotherapy treatment. Combining photodynamic therapy with immunotherapy enhances the immunostimulating response and has synergistic effects for metastatic cancer treatment. Another desirable feature of PIT using mAb-IR700 conjugate is that it also emits fluorescence light upon activation. Therefore before PIT, mAb-IR700 can be administered at a lower dosage to guide the application of excitation light to tumor tissues, further minimizing unnecessary light exposure to surrounding tissues. (en)
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- Fóta-imdhíon-teiripe (ga)
- 光免疫療法 (ja)
- Photoimmunotherapy (en)
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