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Journal of Biomedical Optics • Open Access

Optical scatter changes at the onset of apoptosis are spatially associated with mitochondria

Paper Abstract

We combine optical scatter imaging (OSI) with fluorescence imaging of mitochondria to investigate the spatial relationship between the optical scatter signal and the location and structure of mitochondria within endothelial cells undergoing apoptosis. The OSI data corroborate our previous results showing a decrease in the intensity ratio of wide-to-narrow angle scatter [optical scatter image ratio (OSIR)] during the first 60 min of apoptosis. In addition, we find here that this is followed by an increase in OSIR concurrent with mitochondrial fragmentation. We demonstrate that the dynamic change in light scattering is spatially associated with subcellular regions containing fluorescently labeled mitochondria, and remains absent from adjacent nonfluorescent regions dominated by other organelles. These results lend strong support to the hypothesis that mitochondria act as the source of the optical scatter changes measured at the onset of apoptosis.

Paper Details

Date Published: 1 July 2010
PDF: 3 pages
J. Biomed. Opt. 15(4) 040504 doi: 10.1117/1.3467501
Published in: Journal of Biomedical Optics Volume 15, Issue 4
Show Author Affiliations
Robert M. Pasternack, Rutgers, The State Univ. of New Jersey (United States)
Jing-Yi Zheng, Rutgers, The State Univ. of New Jersey (United States)
Nada N. Boustany, Rutgers, The State Univ. of New Jersey (United States)

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