Journal
JOURNAL OF BIOPHOTONICS
Volume 2, Issue 10, Pages 573-580Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jbio.200810071
Keywords
atherosclerosis; optical coherence tomography; permeability rate; low-density lipoproteins
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Funding
- Office of Naval Research
- Institute of Biomedical Imaging Sciences
- University of Houston Small Grants Program
- National Institutes of Health [HL 63090]
- NATIONAL EYE INSTITUTE [R01EY022362] Funding Source: NIH RePORTER
- NATIONAL HEART, LUNG, AND BLOOD INSTITUTE [R01HL063090, R01HL095586] Funding Source: NIH RePORTER
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Quantification of the diffusion of small molecules and large lipid transporting lipoproteins across arterial tissues could be useful in elucidating the mechanism(s) of atherosclerosis. Optical coherence tomography (OCT) was used to determine the effect of temperature on the rate of diffusion of glucose and low-density lipoproteins (LDL) in human carotid endarterectomy tissue in vitro. The permeability rate for glucose was calculated to be (3.51 +/- 0.27) x 10(-5) cm/s (n = 13) at 20 degrees C and (3.70 +/- 0.44) x 10(-5) cm/s (n = 5) at 37 degrees C for LDL the rate was (2.42 +/- 0.33) x 10(-5) cm/s (n = 5) at 20 degrees C and (4.77 +/- 0.48) x 10(-5) cm/s (n = 7) at 37 degrees C, where n is the number of samples. These results demonstrate that temperature does not significantly influence the permeation of small molecules (e.g. glucose), however, raising the temperature does significantly increase the permeation of LDL. These results provide new information about the capacity of an atherogenic lipoprotein to traverse the intimal layer of the artery. These results also demonstrate the potential of OCT for elucidating the dynamics of lipoprotein perfusion across the arterial wall. [GRAPHICS] Sample OCT signal slope graph recorded during a glucose diffusion experiment at 37 degrees C (C) 2009 by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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