| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Mitochondria-targeted Triphenylamine Derivatives Activatable by Two-Photon Excitation for Triggering and Imaging Cell Apoptosis
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| Autores: |
Chennoufi, Rahima
Bougherara, Houcine
Gagey-eilstein, Nathalie
Dumat, Blaise
Henry, Etienne
Subra, Frederic
Bury-mone, Stephanie
Mahuteau-betzer, Florence
Tauc, Patrick
Teulade-fichou, Marie-paule
Deprez, Eric
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| Data: |
2016-03
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| Ano: |
2016
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| Palavras-chave: |
Apoptosis
Small molecules
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| Resumo: |
Photodynamic therapy (PDT) leads to cell death by using a combination of a photosensitizer and an external light source for the production of lethal doses of reactive oxygen species (ROS). Since a major limitation of PDT is the poor penetration of UV-visible light in tissues, there is a strong need for organic compounds whose activation is compatible with near-infrared excitation. Triphenylamines (TPAs) are fluorescent compounds, recently shown to efficiently trigger cell death upon visible light irradiation (458 nm), however outside the so-called optical/therapeutic window. Here, we report that TPAs target cytosolic organelles of living cells, mainly mitochondria, triggering a fast apoptosis upon two-photon excitation, thanks to their large two-photon absorption cross-sections in the 760-860 nm range. Direct ROS imaging in the cell context upon multiphoton excitation of TPA and three-color flow cytometric analysis showing phosphatidylserine externalization indicate that TPA photoactivation is primarily related to the mitochondrial apoptotic pathway via ROS production, although significant differences in the time courses of cell death-related events were observed, depending on the compound. TPAs represent a new class of water-soluble organic photosensitizers compatible with direct two-photon excitation, enabling simultaneous multiphoton fluorescence imaging of cell death since a concomitant subcellular TPA re-distribution occurs in apoptotic cells.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
http://archimer.ifremer.fr/doc/00320/43168/42726.pdf
http://archimer.ifremer.fr/doc/00320/43168/42727.pdf
DOI:10.1038/srep21458
http://archimer.ifremer.fr/doc/00320/43168/
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| Editor: |
Nature Publishing Group
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| Formato: |
application/pdf
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| Fonte: |
Scientific Reports (2045-2322) (Nature Publishing Group), 2016-03 , Vol. 6 , N. 21458 , P. 1-12
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| Direitos: |
This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material.
info:eu-repo/semantics/openAccess
restricted use
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