Second harmonic generation and multiphoton microscopic detection of collagen without the need for species specific antibodies
Chen, Alice C.-H., McNeilly, Celia, Liu, Ashley P.-Y., Flaim, Christopher J., Cuttle, Leila, Kendall, Mark, Kimble, Roy M., Shimizu, Hiroshi, & McMillan, James R. (2011) Second harmonic generation and multiphoton microscopic detection of collagen without the need for species specific antibodies. Burns, 37(6), pp. 1001-9.
High-resolution, high-contrast, three-dimensional images of live cell and tissue architecture can be obtained using second harmonic generation (SHG), which comprises non-absorptive frequency changes in an excitation laser line. SHG does not require any exogenous antibody or fluorophore labeling, and can generate images from unstained sections of several key endogenous biomolecules, in a wide variety of species and from different types of processed tissue. Here, we examined normal control human skin sections and human burn scar tissues using SHG on a multi-photon microscope (MPM). Examination and comparison of normal human skin and burn scar tissue demonstrated a clear arrangement of fibers in the dermis, similar to dermal collagen fiber signals. Fluorescence-staining confirmed the MPM-SHG collagen colocalization with antibody staining for dermal collagen type-I but not fibronectin or elastin. Furthermore, we were able to detect collagen MPM-SHG signal in human frozen sections as well as in unstained paraffin embedded tissue sections that were then compared with hematoxylin and eosin staining in the identical sections. This same approach was also successful in localizing collagen in porcine and ovine skin samples, and may be particularly important when species-specific antibodies may not be available. Collectively, our results demonstrate that MPM SHG-detection is a useful tool for high resolution examination of collagen architecture in both normal and wounded human, porcine and ovine dermal tissue.
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|Item Type:||Journal Article|
|Keywords:||Animals, *Burns/pathology, Child, *Cicatrix/pathology, Collagen Type I/*analysis, Elastin/analysis, Epidermis/*chemistry/pathology, Female, Fetus, Fibronectins/analysis, Humans, Microscopy, Fluorescence, Multiphoton/*methods, Sheep, Swine|
|Divisions:||Current > Schools > School of Biomedical Sciences
Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
|Copyright Owner:||Copyright 2011 Pergamon|
|Deposited On:||27 Feb 2014 01:03|
|Last Modified:||25 Mar 2014 23:44|
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