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- W2001502783 abstract "The photosensitizer 9-capronyloxytetrakis (methoxyethyl) porphycene localizes predominantly in the endoplasmic reticulum (ER) and, to a lesser extent, in mitochondria of murine leukemia L1210 cells. Subsequent irradiation results in the loss of ER > mitochondrial Bcl-2 and an apoptotic response. Although an increase in cytosolic Ca2+ was observed after irradiation, apoptosis was not inhibited by either the presence of the calcium chelator BAPTA or by the mitochondrial uniporter inhibitor ruthenium amino binuclear complex (Ru360). Moreover, neither reagent prevented the loss of Bcl-2. Ruthenium red (RR) devoid of Ru360 prevented Bcl-2 loss, release of Ca2+ from the ER and the initiation of apoptosis. Since RR was significantly more sensitive than Ru360 to oxidation by singlet oxygen, we attribute the protective effect of RR to the quenching of reactive oxygen species. Although cytosolic and (to a lesser extent) mitochondrial Ca2+ levels were elevated after photodynamic therapy, these changes were apparently insufficient to contribute to the development of apoptosis." @default.
- W2001502783 created "2016-06-24" @default.
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- W2001502783 date "2005-02-18" @default.
- W2001502783 modified "2023-10-06" @default.
- W2001502783 title "Ruthenium red-mediated suppression of Bcl-2 loss and Ca2+ release initiated by photodamage to the endoplasmic reticulum: scavenging of reactive oxygen species" @default.
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- W2001502783 doi "https://doi.org/10.1038/sj.cdd.4401579" @default.
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