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Proceedings Paper

Multiphoton fluorescence spectra and lifetimes of biliverdins and their protein-associated complex
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Paper Abstract

To investigate whether endogenous biliverdins can serve as a fluorescence metabolic marker in cancer diagnosis, we measured their multiphoton fluorescence spectra and lifetimes with femtosecond Cr:forsterite laser. Excited at 1230nm, the two-photon fluorescence of biliverdins peaks around 670nm. The corresponding lifetime (<100ps) was much shorter than those of porphyrins (~10ns), which is another commonly present metabolites in living cells. Further mixing biliverdins with proteins like fetal bovine serum (FBS), biliverdins reductase A (BVRA), or heme oxygenase-1 (HO-1), the yields of red autofluorescences didn't change a lot, but the corresponding lifetimes with HO-1 and BSA were lengthened to 200~300ps. This indicates that biliverdin can have an association with these proteins and change its lifetime. These spectral and temporal characteristics of fluorescence make biliverdin a potential marker fluorophore for hyperspectral diagnosis on the heme catabolism in human cells or tissues.

Paper Details

Date Published: 2 February 2012
PDF: 5 pages
Proc. SPIE 8233, Reporters, Markers, Dyes, Nanoparticles, and Molecular Probes for Biomedical Applications IV, 82330P (2 February 2012); doi: 10.1117/12.907725
Show Author Affiliations
Chin-Jie Huang, National Taiwan Univ. (Taiwan)
Cheng-Ham Wu, National Taiwan Univ. (Taiwan)
Tzu-Ming Liu, National Taiwan Univ. (Taiwan)

Published in SPIE Proceedings Vol. 8233:
Reporters, Markers, Dyes, Nanoparticles, and Molecular Probes for Biomedical Applications IV
Samuel Achilefu; Ramesh Raghavachari, Editor(s)

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