Small David M, Jones Jason S, Tendler Irwin I, Miller Paul E, Ghetti Andre, Nishimura Nozomi
Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, 526 N. Campus Rd., Ithaca, NY 14853, USA.
Anabios Corporation, 3030 Bunker Hill St., San Diego, CA 92109, USA.
Biomed Opt Express. 2017 Dec 13;9(1):214-229. doi: 10.1364/BOE.9.000214. eCollection 2018 Jan 1.
Multiphoton microscopy using laser sources in the mid-infrared range (MIR, 1,300 nm and 1,700 nm) was used to image atherosclerotic plaques from murine and human samples. Third harmonic generation (THG) from atherosclerotic plaques revealed morphological details of cellular and extracellular lipid deposits. Simultaneous nonlinear optical signals from the same laser source, including second harmonic generation and endogenous fluorescence, resulted in label-free images of various layers within the diseased vessel wall. The THG signal adds an endogenous contrast mechanism with a practical degree of specificity for atherosclerotic plaques that complements current nonlinear optical methods for the investigation of cardiovascular disease. Our use of whole-mount tissue and backward scattered epi-detection suggests THG could potentially be used in the future as a clinical tool.
使用中红外波段(MIR,1300纳米和1700纳米)激光源的多光子显微镜用于对小鼠和人类样本中的动脉粥样硬化斑块进行成像。动脉粥样硬化斑块的三次谐波产生(THG)揭示了细胞和细胞外脂质沉积物的形态细节。来自同一激光源的同时非线性光学信号,包括二次谐波产生和内源性荧光,产生了病变血管壁内各层的无标记图像。THG信号增加了一种内源性对比机制,对动脉粥样硬化斑块具有实际程度的特异性,补充了当前用于研究心血管疾病的非线性光学方法。我们对整装组织和背向散射落射检测的使用表明,THG未来有可能用作临床工具。