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Label-free Raman observation of cytochrome c dynamics during apoptosis.


ABSTRACT: We performed label-free observation of molecular dynamics in apoptotic cells by Raman microscopy. Dynamic changes in cytochrome c distribution at the Raman band of 750 cm(-1) were observed after adding an apoptosis inducer to the cells. The comparison of mitochondria fluorescence images and Raman images of cytochrome c confirmed that changes in cytochrome c distribution can be distinguished as release of cytochrome c from mitochondria. Our observation also revealed that the redox state of cytochrome c was maintained during the release from the mitochondria. Monitoring mitochondrial membrane potential with JC-1 dye confirmed that the observed cytochrome c release was associated with apoptosis.

SUBMITTER: Okada M 

PROVIDER: S-EPMC3252932 | biostudies-literature | 2012 Jan

REPOSITORIES: biostudies-literature

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Label-free Raman observation of cytochrome c dynamics during apoptosis.

Okada Masaya M   Smith Nicholas Isaac NI   Palonpon Almar Flotildes AF   Endo Hiromi H   Kawata Satoshi S   Sodeoka Mikiko M   Fujita Katsumasa K  

Proceedings of the National Academy of Sciences of the United States of America 20111219 1


We performed label-free observation of molecular dynamics in apoptotic cells by Raman microscopy. Dynamic changes in cytochrome c distribution at the Raman band of 750 cm(-1) were observed after adding an apoptosis inducer to the cells. The comparison of mitochondria fluorescence images and Raman images of cytochrome c confirmed that changes in cytochrome c distribution can be distinguished as release of cytochrome c from mitochondria. Our observation also revealed that the redox state of cytoch  ...[more]

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