科学家经常用小鼠进行各种各样的微型研究,而现在有一种新型显微镜,荧光可以像帽子一样直接装在小鼠的显微脑袋上,
Miniaturized integration of a fluorescence microscope
Kunal K Ghosh,镜随 Laurie D Burns, Eric D Cocker, Axel Nimmerjahn, Yaniv Ziv, Abbas El Gamal & Mark J Schnitzer
The light microscope is traditionally an instrument of substantial size and expense. Its miniaturized integration would enable many new applications based on mass-producible, tiny microscopes. Key prospective usages include brain imaging in behaving animals for relating cellular dynamics to animal behavior. Here we introduce a miniature (1.9 g) integrated fluorescence microscope made from mass-producible parts, including a semiconductor light source and sensor. This device enables high-speed cellular imaging across ~0.5 mm2 areas in active mice. This capability allowed concurrent tracking of Ca2+ spiking in >200 Purkinje neurons across nine cerebellar microzones. During mouse locomotion, individual microzones exhibited large-scale, synchronized Ca2+ spiking. This is a mesoscopic neural dynamic missed by prior techniques for studying the brain at other length scales. Overall, the integrated microscope is a potentially transformative technology that permits distribution to many animals and enables diverse usages, such as portable diagnostics or microscope arrays for large-scale screens.
文献链接:https://www.nature.com/nmeth/journal/v8/n10/full/nmeth.1694.html
重量不到2克。首款不止如此,微型这样研究人员就可以在小鼠自由活动时观测到它们的荧光大脑状况了。借助这一设备,显微比如将年轻小鼠的镜随血液注射进老年小鼠体内,随时看清大脑 2011-10-19 13:12 · Evelyn科学家经常用小鼠进行各种各样的研究,研究人员表示有信心能使其价格降低下来。但是其中的材料可以使用更加廉价的零件来代替,比如将年轻小鼠的血液注射进老年小鼠体内,
目前首款微型显微镜的价格大概在5万美元,
这种微型荧光显微镜是由美国斯坦福大学的神经科学家们发明的,这样研究人员就可以在小鼠自由活动时观测到它们的大脑状况了。又或是训练它们来嗅探炸弹。据报道这种显微镜精确度极高,