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Contrast Media & Molecular Imaging
Volume 2017, Article ID 7659242, 7 pages
https://doi.org/10.1155/2017/7659242
Research Article

Effects of Depilation-Induced Skin Pigmentation and Diet-Induced Fluorescence on In Vivo Fluorescence Imaging

Center for Molecular Imaging, The Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Center, Houston, TX 77030, USA

Correspondence should be addressed to Sunkuk Kwon; ude.cmt.htu@nowk.kuknus

Received 3 April 2017; Revised 17 May 2017; Accepted 21 May 2017; Published 19 June 2017

Academic Editor: Wang Xu

Copyright © 2017 Sunkuk Kwon and Eva M. Sevick-Muraca. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Near-infrared fluorescence imaging (NIRFI) and far-red fluorescence imaging (FRFI) were used to investigate effects of depilation-induced skin pigmentation and diet-induced background fluorescence on fluorescent signal amplitude and lymphatic contraction frequency in C57BL6 mice. Far-red fluorescent signal amplitude, but not frequency, was affected by diet-induced fluorescence, which was removed by feeding the mice an alfalfa-free diet, and skin pigmentation further impacted the amplitude measurement. NIRFI showed minimal background fluorescence; however, skin pigmentation reduced the amplitude of fluorescent signal changes. Therefore, these effects should be taken into account when imaging mice with different states of skin pigmentation and diet-induced background fluorescence in vivo.