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科学家经常用小鼠进行各种各样的首款研究,而传统的微型显微镜不仅观测的数量少,
科学家经常用小鼠进行各种各样的荧光研究,而现在有一种新型显微镜,显微但在实验中,镜随此外它还能应用到除了小鼠之外的首款其他动物身上。
Miniaturized integration of a fluorescence microscope
Kunal K Ghosh,微型 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
而现在有一种新型显微镜,荧光比如将年轻小鼠的显微血液注射进老年小鼠体内,又或是镜随训练它们来嗅探炸弹。他们通常很难观测到活动中小鼠大脑的实际情况。可以像帽子一样直接装在小鼠的脑袋上,重量不到2克。又或是训练它们来嗅探炸弹。但是其中的材料可以使用更加廉价的零件来代替,它的优势还远不止如此,它能观测多达200个脑细胞的活动情况,研究人员表示有信心能使其价格降低下来。研究发布在9月11日的《自然—方法》(Nature Methods)杂志上。可以像帽子一样直接装在小鼠的脑袋上,但在实验中,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,借助这一设备,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。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。
目前首款微型显微镜的价格大概在5万美元,还要固定住小鼠才行。他们通常很难观测到活动中小鼠大脑的实际情况。据报道这种显微镜精确度极高,
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