3-photon fluorescence and third-harmonic generation imaging of myelin sheaths in mouse digital skin in vivo: A comparative study

被引：8

作者：

Wang, Ke ^{[1
]}

Pan, Yi ^{[1
]}

Chen, Xinlin ^{[1
]}

Tong, Shen ^{[1
]}

Liang, Huiping ^{[1
]}

Lu, Yuan ^{[2
]}

Qiu, Ping ^{[1
]}

机构：

[1] Shenzhen Univ, Coll Phys & Optoelect Engn, Key Lab Optoelect Devices & Syst, Minist Educ & Guangdong Prov, Shenzhen 518060, Peoples R China

[2] Shenzhen Univ, Dept Dermatol, Hosp 6, Nanshan Hosp, Shenzhen 518052, Peoples R China

来源：

JOURNAL OF INNOVATIVE OPTICAL HEALTH SCIENCES | 2022年 / 15卷 / 01期

基金：

中国国家自然科学基金;

关键词：

3-photon microscopy; digital skin; myelin; 1700-nm window; MICROSCOPY; BRAIN;

D O I：

10.1142/S1793545822500031

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Myelin sheaths wrapping axons are key structures that help maintain the propagation speed of action potentials in both central and peripheral nervous systems (CNS and PNS). However, noninvasive, deep imaging technologies visualizing myelin sheaths in the digital skin in vivo are lacking in animal models. 3-photon fluorescence (3PF) imaging excited at the 1700-nm window enables deep imaging of myelin sheaths, but necessitates labeling by exogenous fluorescent dyes. Since myelin sheaths are lipid-rich structures which generate strong third-harmonic signals, in this paper, we perform a detailed comparative experimental study of both third-harmonic generation (THG) and 3PF imaging in the mouse digital skin in vivo. Our results show that THG imaging also enables visualization of myelin sheaths deep in the mouse digital skin, which shows colocalization with 3PF signals from labeled myelin sheaths. Besides its superior label-free advantage, THG does not suffer from photobleaching due to its 3PF property.

引用

页数：8

共 27 条

[1] Local assessment of myelin health in a multiple sclerosis mouse model using a 2D Fourier transform approach [J].