Near infra-red light treatment of Alzheimer's disease

作者：Han, Mengmeng; Wang, Qiyan; Wang, Xue; Zeng, Yuhui; Huang, Yong; Meng, Qingqiang; Zhang, Jun; Wei, Xunbin^*

来源：Journal of Innovative Optical Health Sciences, 2018, 11(1): 1750012.

DOI：10.1142/S1793545817500122

• Alzheimer's disease
• near infra-red light
• transgenic mouse model
• Morris water maze
• immunofluorescence analysis

Alzheimer's disease (AD) is a chronic neurodegenerative disease. The symptoms include memory and spatial learning difficulties, language disorders, and loss of motivation, which get worse over time, eventually ending in death. No effective treatments are available for AD, currently. Current treatments only attenuate symptoms temporarily and are associated with severe side effects. Near infra-red (NIR) light has been studied for a long time. We investigated the effect of NIR on AD using a transgenic mouse model, which was obtained by co-injecting two vectors carrying AD mutations in amyloid precursor protein (APP) and presenilin-1 (PSEN1) into C57BL/6J mice. The irradiation equipment consisted of an accommodating box and an LED array. The wavelength of NIR light emitted from LED was between 1040 nm and 1090 nm. The power density delivered at the level of the mice was approximately 15 mW/cm(2). Firstly, we treated the mice with NIR for 40 days. Then, the irradiation was suspended for 28 days. Finally, another 15 days treatment was brought to mice. We conducted Morris water maze and immunofluorescence analysis to evaluate the effect of treatment. Immunofluorescence analysis was based on measuring the quantity of plaques in mouse brain slices. Our results show that NIR light improves memory and spatial learning ability and reduces plaques moderately. NIR light represents a potential treatment for AD.

• 出版日期2018-1
• 单位上海交通大学; 中国人民解放军总医院