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Biomedical Optics Express

Biomedical Optics Express

  • Editor: Joseph A. Izatt
  • Vol. 3, Iss. 2 — Feb. 1, 2012
  • pp: 296–312

Correlating light scattering with internal cellular structures

Oana C. Marina, Claire K. Sanders, and Judith R. Mourant  »View Author Affiliations


Biomedical Optics Express, Vol. 3, Issue 2, pp. 296-312 (2012)
http://dx.doi.org/10.1364/BOE.3.000296


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Abstract

The origins of side scattering from a fibroblast and cervical cell line were determined by comparing side-scatter images with images stained for lysosomes, nuclei, and mitochondria on a cell by cell basis. Lysosomes or nuclei are the most efficient type of scatterer depending on the cell type and incident light polarization. The relative scattering efficiencies of lysosomes and mitochondria were the same for both cell lines, while the scattering efficiencies of the nuclei differed. The percent of 90° scattering from the nucleus, mitochondria, and lysosomes as well as the group of other internal cellular objects was estimated. The nucleus was the largest contributor to side scatter in the cervical carcinoma cells. The contributions of lysosomes, mitochondria, the nucleus, and particles unstained by either Hoechst, LysoSensor or MitoTracker ranges from ∼20% to ∼30% in fibroblast cells. The contribution of lysosomes to side scatter was much stronger when the incident light was polarized perpendicular to the scattering plane than when the polarization of the side scatter laser was parallel to the scattering plane. This dependence on side scatter polarization indicates that lysosomes contain scattering structures that are much smaller than the wavelength of light used in the measurements (785 nm). In conclusion, mitochondria were not found to be either the most efficient scatterer or to have the largest contribution to scattering in either cell line, in contrast to previous reports. Rather lysosomes, nuclei and unknown particles all have significant contributions to 90° scattering and the contributions of some of these particles can be modulated by changing the polarization of the incident light.

© 2012 OSA

OCIS Codes
(170.0170) Medical optics and biotechnology : Medical optics and biotechnology
(290.0290) Scattering : Scattering

ToC Category:
Cell Studies

History
Original Manuscript: October 7, 2011
Revised Manuscript: December 2, 2011
Manuscript Accepted: December 30, 2011
Published: January 13, 2012

Citation
Oana C. Marina, Claire K. Sanders, and Judith R. Mourant, "Correlating light scattering with internal cellular structures," Biomed. Opt. Express 3, 296-312 (2012)
http://www.opticsinfobase.org/boe/abstract.cfm?URI=boe-3-2-296


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