Second harmonic generation imaging of skin wound healing and scarring in a rabbit ear model

Yiyan Tang; Xiaoqin Zhu; Shuyuan Xiong; Jianxin Chen

doi:10.1117/12.1000154

11 December 2012 Second harmonic generation imaging of skin wound healing and scarring in a rabbit ear model

Yiyan Tang, Xiaoqin Zhu, Shuyuan Xiong, Jianxin Chen

Proceedings Volume 8553, Optics in Health Care and Biomedical Optics V; 855322 (2012) https://doi.org/10.1117/12.1000154
Event: Photonics Asia, 2012, Beijing, China

Abstract

Skin wound healing and scarring in rabbit ears was examined by second harmonic generation (SHG) microscopy. Rabbit ear wound model was created by punching from the ventral surface with removal of epidermis, dermis and perichondrium. The samples were collected weekly, and cut into 100 μm thickness sections for SHG imaging. SHG imaging system was operated at 810 nm, producing SHG signals at half the excitation wavelength 405 nm. A Plan-Neofluar objective (x40 and NA=0.75) was employed for focusing the excitation beam into tissue samples and was also used to collect the backscattered intrinsic SHG signals. Our results showed apparent difference in collagen content and microstructure at various wound healing and scarring time points. It suggested that SHG signals from collagen can serve as a good indicator for characterization of wound status. With the advancement on miniaturization, microscopy based on SHG will become a valuable tool for monitoring the wound healing and scarring in vivo, and help to guide the improvement of scar appearance with appropriate and subtle modulation during wound healing based on better understanding of scarring response mechanism.

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Yiyan Tang, Xiaoqin Zhu, Shuyuan Xiong, and Jianxin Chen "Second harmonic generation imaging of skin wound healing and scarring in a rabbit ear model", Proc. SPIE 8553, Optics in Health Care and Biomedical Optics V, 855322 (11 December 2012); https://doi.org/10.1117/12.1000154

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KEYWORDS

Wound healing

Collagen

Second-harmonic generation

Ear

Microscopy

Tissues

Skin

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