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Proceedings Paper

Atherosclerosis staging: imaging using FLIM technique
Author(s): Leticia B. Sicchieri; Marina Berardi Barioni; Mônica Nascimento Silva; Andrea Moreira Monteiro; Antonio Martins Figueiredo Neto; Amando S. Ito; Lilia C. Courrol
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Paper Abstract

In this work it was used fluorescence lifetime imaging (FLIM) to analyze biochemical composition of atherosclerotic plaque. For this purpose an animal experimentation was done with New Zealand rabbits divided into two groups: a control group of 4 rabbits that received a regular diet for 0, 20, 40 and 60 days; and an experimental group of 9 rabbits, divided in 3 subgroups, that were fed with 1% cholesterol diet for 20, 40 and 60 days respectively. The aortas slices stained with europium chlortetracycline were analyzed by FLIM exciting samples at 440 nm. The results shown an increase in the lifetime imaging of rabbits fed with cholesterol. It was observed that is possible to detect the metabolic changes associated with atherosclerosis at an early stage using FLIM technique exciting the tissue around 440 nm and observing autofluorescence lifetime. Lifetimes longer than 1.75 ns suggest the presence of porphyrins in the tissue and consequently, inflammation and the presence of macrophages.

Paper Details

Date Published: 4 March 2014
PDF: 8 pages
Proc. SPIE 8947, Imaging, Manipulation, and Analysis of Biomolecules, Cells, and Tissues XII, 89472B (4 March 2014); doi: 10.1117/12.2040139
Show Author Affiliations
Leticia B. Sicchieri, Instituto de Pesquisas Energéticas e Nucleares (Brazil)
Marina Berardi Barioni, Univ. de São Paulo (Brazil)
Mônica Nascimento Silva, Univ. Federal de São Paulo (Brazil)
Andrea Moreira Monteiro, Univ. de São Paulo (Brazil)
Antonio Martins Figueiredo Neto, Univ. de São Paulo (Brazil)
Amando S. Ito, Univ. de São Paulo (Brazil)
Lilia C. Courrol, Instituto de Pesquisas Energéticas e Nucleares (Brazil)
Univ. Federal de São Paulo (Brazil)


Published in SPIE Proceedings Vol. 8947:
Imaging, Manipulation, and Analysis of Biomolecules, Cells, and Tissues XII
Daniel L. Farkas; Dan V. Nicolau; Robert C. Leif, Editor(s)

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