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Department of Biology, Brandeis
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Hornstein, N. J., Pulver, S. R., Griffith, L. C. Channelrhodopsin2 Mediated Stimulation of Synaptic Potentials at Drosophila Neuromuscular Junctions. J. Vis. Exp. (25), e1133, doi:10.3791/1133 (2009).
第1部分:动物保健和遗传杂交
第2部分:钻机安装
第3部分:夹层
第4部分:肌肉录音和蓝色光刺激
代表性的成果:
图1A显示了录音的设置和剔骨准备的示意图。图1B显示了典型的EJP短的光脉冲诱发。 EJP幅度显示总结既支配M6从两个电机神经元的幅度。光照强度下,只激活一个运动单位(数据未显示)。

图1:A)细胞内记录钻机和蓝色LED的一般原理图。拆下来抑制大脑(BR)是在腹侧神经节(VG)的有节奏的活动。 ChR2表示使用GAL4 - UAS的系统在电机神经元。二)从M6的肌肉细胞内记录。 40毫秒蓝色光脉冲(127μW/毫米2)可靠地唤起M6突触潜力大(星号) 。
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关键步骤涉及的初步解剖和进入肌肉细胞。如果神经被切断,或在初始剥离肌肉受损,就很难继续实验的休息。在清扫过程中,必须非常谨慎的角度在背的切口,向上为尽可能解剖剪刀。在第二个关键的一步,进入肌肉细胞,一个必须注意的一个极化过去〜30 mV的。 -30毫伏以上的值指示电极是不是肌肉细胞内或在一个不健康的细胞正常。
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我们有没有利益冲突披露。
这项工作得到了国家卫生赠款RO1GM - 33205和MH - 067284研究院立法会格里菲斯和一个布兰代斯大学的夏季本科生科研奖学金,新泽西州Hornstein。作为2008年神经系统和行为暑期课程(镍氢补助金:R25 MH059472)的一部分,马在伍兹霍尔海洋生物实验室进行这项技术的初步实验。
| Name | Company | Catalog Number | Comments |
| Sylgard | Ellsworth Adhesives | 4019862 | www.ellsworth.com |
| Minutens Pins | Fine Science Tools | 26002-10 | www.finescience.com |
| Dissecting Dish | Fisher Scientific | www.fishersci.com | |
| Neuroprobe Intracellular Amplifier and Head Stage | A-M Systems | 680100 | www.a-msystems.com |
| Powerlab 4/30 data acquisition system | ADInstruments |
www.adinstruments.com | |
| Grass stimulator | Grass Technologies | www.grasstechnologies.com | |
| Desktop Computer | Dell | www.dell.com | |
| Dissecting Scope | Leica Microsystems | www.leica-microsystems.com | |
| Light Source | Dolan-Jenner Industries | 41446-062 | www.dolan-jenner.com |
| Fly Media | |||
| All-Trans-Retinal | Sigma-Aldrich | 116-31-4 | www.sigmaaldrich.com |
| OK-371 Gal4 Flies | Bloomington Stock center | ||
| UAS-ChR2 Flies | Fiala lab, Griffith lab | ||
| LED controller circuit | Built in Griffith lab | http://www.ledsupply.com http://www.futureelectronics.com Composed of: 1. 200 mA Buck Puck 2. Blue LED 3. Insulated wire 4. Circuit bread board |
|
| LED Heat Sink | Thorlabs Inc. | http://www.thorlabs.com/ | |
| Air Table | TMC | http://www.techmfg.com/products/accessories/intro3.html | |
| Faraday Cage | Built in Griffith lab | ||
| Leica Leitz M Micro-Manipulator | Leica Microsystems | ACS01 | www.leica-microsystems.com |
| Electrode Holder | Axon Instruments | www.axon.com | |
| Borosilicate Glass | FHC, Inc. | www.fh-co.com/p14-15.pdf | |
| Electrode Puller | Sutter Instrument Co. | www.sutter.com | |
| HL 3.1 Saline with 0.8mM Ca2+ | Contents (mM): NaCl:70 KCl:5 CaCl2: 0.8 MgCl2:4Sucrose:115 NaHCO3: 10 Trehalose: 5 HEPES |
||
| Micro-Dissection Tools | Fine Science Tools | www.finescience.com |
A nice vido. I want to konw what model of light source did you use ? I could not find it by the Cata Num on the website.
Thanks a lot.
Kewen
School of medicine Zhejiang University
1
ReplyPosted by: Jiang K.December 17, 2009, 9:02 PM