Imaging corneal pathology in a transgenic mouse model using nonlinear microscopy

Journal of Biomedical Optics
Julia G LyubovitskyBruce J Tromberg

Abstract

A transgenic mouse model with a Clim [co-factor of LIM (a combination of first letters of Lin-11 (C. elegans), ISL1 (rat), and Mec-3 (C. elegans) gene names) domain proteins] gene partially blocked in the epithelial compartment of its tissues is used to establish the sensitivity of intrinsic reflectance nonlinear optical microscopy (NLOM) to stromal and cellular perturbations in the cornea. Our results indicate dysplasia in the squamous epithelium, irregular collagen arrays in the stroma, and a compromised posterior endothelium in the corneas of these mice. As suggested by biochemical data, the collagen alterations are likely due to collagen III synthesis and deposition during healing and remodeling of transgenic mice corneal stromas. All of the topographic features seen in NLOM images of normal and aberrant corneas are confirmed by coregistration with histological sections. In this work, we also use ratiometric redox fluorometry based on two-photon excited cellular fluorescence from reduced nicotinamide adenine dinucleotide (NAD)(P)H and oxidized flavin adenine dinucleotide (FAD) to study mitochondrial energy metabolism. Employing this method, we detect higher metabolic activity in the endothelial layer of cornea compared to a...Continue Reading

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Citations

Jul 20, 2006·Analytical and Bioanalytical Chemistry·Wei DuBi-Feng Liu
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