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Proceedings Paper

Non-invasive, in vivo fluorescence technique as an objective tool for monitoring wound healing following low level laser therapy
Author(s): Vijendra Prabhu; Edward Mark Fernandes; Bola Sadashiva Satish Rao; Krishna Kishore Mahato
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Paper Abstract

Collagen represents major protein component of the extracellular matrix (ECM), thus its monitoring could be used as an ideal tool for assessing wound healing following therapy. Presently, there is a great need to develop quick, objective, non-destructive method to monitor collagen synthesis during progression of wound healing. The applicability of the Laser induced fluorescence technique towards wound healing monitoring by measuring collagen levels at different stages of the healing progression is the main idea behind the current work. Six to eight weeks old Swiss albino mice with ccircular wounds of 15 mm diameter were illuminated with single exposure of 2 J/cm2 from He-Ne laser (632.8 nm; 7 mW power; 4.02 mW/cm2 power density) along with un-illuminated and un-wounded controls. Spectroscopic changes were monitored by recording in vivo fluorescence from each animal (under anesthesia) at different post-wounding days (5th, 10th, 30thday) by exciting granulation tissue/skin with 325 nm He-Cd laser. The autofluorescence from the tissue/skin was recorded from four different sites and four spectra were recorded from each site. A total of 2160 spectra were recorded from 45 animals. The in vivo fluorescence studies have shown significant increase (P<0.001) in collagen synthesis upon treatment with optimum laser dose of 2 J/cm2 immediately after wounding as compared to un-illuminated control group. It can conclude that in vivo fluorescence measurement is effective in monitoring wound healing and hence could be used over ex vivo method as an objective and non-intrusive method to monitor collagen levels

Paper Details

Date Published: 8 March 2013
PDF: 7 pages
Proc. SPIE 8565, Photonic Therapeutics and Diagnostics IX, 85650L (8 March 2013); doi: 10.1117/12.2005760
Show Author Affiliations
Vijendra Prabhu, Manipal Univ. (India)
Edward Mark Fernandes, Manipal Univ. (India)
Bola Sadashiva Satish Rao, Manipal Univ. (India)
Krishna Kishore Mahato, Manipal Univ. (India)

Published in SPIE Proceedings Vol. 8565:
Photonic Therapeutics and Diagnostics IX
Andreas Mandelis; Brian Jet-Fei Wong; Anita Mahadevan-Jansen; Henry Hirschberg M.D.; Hyun Wook Kang; Nikiforos Kollias; Melissa J. Suter; Kenton W. Gregory M.D.; Guillermo J. Tearney M.D.; Stephen Lam; Bernard Choi; Steen J. Madsen; Bodo E. Knudsen M.D.; E. Duco Jansen; Justus F. Ilgner M.D.; Haishan Zeng; Matthew Brenner; Laura Marcu, Editor(s)

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