这项研究是由先灵基金会的部分资助。秋意是美国癌症分子生物学学会教授，并拥有欧文和琼主席雅各布模范生命科学。这项工作是支持部分由美国国立卫生研究院，Leducq基金会，Meriaux基金会，埃利森医学基金会，易普森/ Biomeasure，赛诺菲安万特，前列腺癌基金会，和HN和弗朗西斯C.伯杰基金会的赠款。首席助理秘书长是由神经科学与药物滥用（R01 DA019022）国立麦克奈特捐赠基金。作者要感谢马克施密特。图形艺术设计由Jamie T.西蒙请Invitrogen公司提供赞助。

1。器官型小脑文化： <ol><li>成功生成器官小脑文化使用P0 - P3或P8 - P12之间的小鼠。对于我们的实验中，我们用小鼠在P8 - P12范围内，因为这个发展阶段，我们的研究更合适。 </li><li>准备剥离和培养基： <ol><li>脑解剖和切片准备进行低钠人工脑脊液中含有1mm的氯化钙（学联），10mm的D -葡萄糖，氯化钾4MM，5MM氯化镁，碳酸氢钠26MM，246mM蔗糖和酚红溶液（1:1000） ，pH值7.3。消毒的解决方案，通过0.22微米的过滤器和储存过滤器，在4 ° C。 </li><li>小脑切片培养的最低限度的基本中鹰（MEM），25％热灭活马血清，25毫米的HEPES，1mm的谷氨酰胺，5毫克/毫升的葡萄糖，青霉素（100 U /毫升）和链霉素（100 U / mL）的75％。最多两个星期，通过0.22微米的过滤器和储存在4 ° C过滤介质。 </li></ol></li><li>解剖冰冷学联以前Carbogen（95％氧气和5％的二氧化碳）注起泡介质的大脑，即饱和与Carbogen将改变溶液的pH值，所以它会转移从红色到橙色。剥离应执行的最短的时间内，小心不要损伤大脑结构的可能。 </li><li>在400微米，使用一个vibratome矢状部分的大脑切片。 <ol><li>用刀片在一个半球矢状切，试图削减小脑尽可能少，这将提供一个平坦的表面为切片。皮质仅用于支持，使切片更加容易，但因为时间是一个重要的问题是更方便的用刀片切出的皮质延髓的一半。 </li><li>使用氰基丙烯酸酯（强力胶）的金属vibratome板固定在大脑的位置。这是很重要的寒意之前加入胶水冰板，并用管的一角，形成一层很薄的粘接层传播。如果有过量的强力胶，它会从板块分离时，在接触与学联和样品将丢失。 </li><li>一旦连接到大脑vibratome板，补充足够的学联媒体，包括大脑，并把下面的冰板，以保持它的冷。 </li><li>切割400微米的薄片，并转移他们用塑料巴斯德吸管（切的提示，以扩大它和避免损坏切片）6孔细胞培养板，含冰学联。 </li><li>小脑两个胰岛素注射器，在解剖显微镜下（与小直径28 -表针的注射器）的帮助下从脑的其余部分分开。有些片将有强力胶的边缘：这是时刻试图删除它，因为它可以影响切片的可行性。重要的是没有仔细损害小脑结构。 </li></ol></li><li>小脑切片传送含0.4微米毛孔，30毫米培养板插入到6孔板。添加1毫升培养基，每孔，预先空调至少2个小时孵化在37 ° C和5％的CO 2（在细胞培养孵化器） 。放置在顶部的媒体，确保被困于车底有没有空气气泡，然后放在确保它们完全伸展的插入，没有液体覆盖它们的顶部和小脑片（每插入1-3）插入。媒体如有必要，吸干多余的。在37 ° C和5％的CO 2改变培养基，每2天或3天。最好是更换一次只有一个中期的部分（如半卷），因为使用的媒介包含片衍生的营养细胞存活的重要因素。 </li></ol> 2。 Fas的治疗和小脑切片染色： <ol><li>对于凋亡的挑战实验中，我们首先培养5天，改变在体外3（DIV3）天的媒体片。 DIV5文化直接将它添加到媒体，以媒体的变化，因为有一个干净的背景细胞死亡，0.5微克/毫升的Fas受体激动剂抗体JO2处理可以诱发一些在文化的死亡率。井有一半是未经处理作为对照组。 </li><li> 24小时后删除下方插入吸媒体。要修复的切片，冰冷的4％PFA下方添加1毫升1毫升以上的插入。孵育10分钟，在室温。 </li><li> 10分钟后取出的煤灰，用冷PBS简要。 </li><li>接下来删除PBS和添加1毫升下方和1 mL，在室温下5分钟以上的20％冰冷的PBS孵育甲醇插入。 </li><li>用PBS洗一遍，并添加1毫升下方和1毫升通透的0.5％TRITON - X - 100的PBS中插入以上。孵育至少12小时在4 ° C。 </li><li>通透后，块的最低为20％BSA的PBS4小时在室温或4℃过夜° C。在这个阶段，片，可以保持在至少3天在4 ° C封闭液</li><li>为了染色片仔细切一块膜插入连接小脑切片，并将其转移到24孔板中含有PBS。 </li><li>免疫是按顺序执行，先用TUNEL试剂一小时，然后Calbidin抗体过夜。 <ol><li>吸出PBS和关闭TUNEL法检测试剂添加到250μL，每口井，确保它涵盖了整个表面的切片。在37 ° C孵育一小时在黑暗中。 </li><li>一个小时后删除TUNEL法混合10分钟，用PBS洗三次。 </li><li>最后一次洗涤后，去除PBS，并添加250μL的PBS Calbindin抗体的1 / 1000稀释，孵育4℃过夜° C黑暗环境中。 </li><li>删除主抗体溶液和10分钟，用PBS洗三次。 </li><li>加入250μL二次抗体稀释在PBS孵育室温在黑暗中至少有三个小时的1 / 500。我们用TUNEL试剂盒是TMR的红色标记，因此我们Calbindin二次抗体结合的Alexa网站- 488。 </li><li> 10分钟，用PBS洗三次，并安装到使用安装媒体包含的DAPI玻璃显微镜幻灯片片。 </li><li>图像分别使用488 nm和561 nm的激发Calbindin和TUNEL wavelenght共聚焦显微镜切片。 </li></ol></li></ol> 3。代表性的成果： 此协议的主要挑战是能够生成健康的小脑切片文化，尤其是因为我们的最终读数将细胞死亡。健康的文化作为一个细胞体层是半透明的出现，可以让你看到叶片状结构，在显微镜下（图1）小脑。经过几天的文化切片薄和非神经细胞开始迁移片的边缘，可以观察。黑暗的圆形细胞（最有可能的巨噬细胞），盖片，经过几天的文化，最终将减少在后10-14天在体外（ 图 2 ）5。切片的可行性，最终证明是不同的细胞标记，如Calbindin，Purkinje细胞染色。图3显示了几个TUNEL阳性细胞核的浦肯野细胞层的代表共聚焦显微镜图像。 重要的是要考虑，即使收到一些切片细胞凋亡的刺激，他们只有24小时的暴露。这允许足够的时间来观察DNA片段，TUNEL染色的细胞死亡，但仍然存在一个定义的浦肯野细胞层。 <img src="/files/ftp_upload/2564/2564fig1.jpg" alt="图1" /> 图1。健康的DIV2小脑分一杯羹。，该图像显示的半透明细胞体层和面理化健康切片小脑结构。 <img src="/files/ftp_upload/2564/2564fig2.jpg" alt="图2" /> 图2。健康的小脑切片格7。在这个图片中，我们仍然可以观察小脑和黑暗的牢房机构的外观面理化结构。 <img src="/files/ftp_upload/2564/2564fig3.jpg" alt="图3" /> 图3。一个FAS治疗小脑切片的形象代表。，这共聚焦图像显示的浦肯野细胞Calbindin（绿色）和阳性细胞凋亡TUNEL染色（红色）的染色。浦肯野细胞不会出现在一个行，但都聚集形成一个薄层状结构。

<ol>
	<li>Hogue, M. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Human+fetal+ependymal+cells+in+tissue+cultures.">Human fetal ependymal cells in tissue cultures.</a> Anat Rec. 99, 523-529 (1947).</li><li>Hogue, M. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Review+of+studies+of+human+fetal+brain+cells+in+tissue+cultures.">Review of studies of human fetal brain cells in tissue cultures.</a> Etudes Neonatales. 1, 1-13 (1952).</li><li>Gogolla, N., Galimberti, I., DePaola, V., Caroni, P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Staining+protocol+for+organotypic+hippocampal+slice+cultures.">Staining protocol for organotypic hippocampal slice cultures.</a> Nat Protoc. 1, 2452-2456 (2006).</li><li>Stoppini, L., Buchs, P. A., Muller, D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+simple+method+for+organotypic+cultures+of+nervous+tissue.">A simple method for organotypic cultures of nervous tissue.</a> J Neurosci Methods. 37, 173-182 (1991).</li><li>Beat, H., G&#228;hwiler, S. M. T., McKinney, R. A., Debanne, D., Robertson, R. T., Banker, G., Goslin, K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> Organotypic Slice Cultures of Neural Tissue in Culturing Nerve Cells. , 461-498 (1998).</li></ol>

所有动物进行的工作是按照IACUC成立的政策。索尔克研究所的一个AAALAC认证认可设施。

这种方法描述的神经器官文化的许多可能的应用之一，它使我们能够研究在野生型和突变型的小脑切片凋亡刺激的效果。 这个实验的最关键部分是能够始终如一地产生健康的小脑切片文化。关键因素是解剖和切片技术和能力履行该协议可能在最短时间内，但在同一时间，小心不要损坏切片。另一个关键因素是编制和培养基的成分，这些文化都非常敏感，所以我们来测试多个配方以及媒体的品牌。即使不同批次的血清或任何其他组件的媒体可能会影响切片的可行性。我们得到了最好的结果与马血清自Invitrogen批号480116。 一旦产生小脑切片，可以研究小脑的发展，电，单靠细胞存活或凋亡刺激，兴奋性毒性或缺氧。使用野生型和突变型的小脑切片的比较研究已经非常有见地的小脑的功能和发展的许多方面。

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		<th>Material Name</th>
		<th>Type</th>
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		<th>Catalogue Number</th>
		<th>Comment</th>
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<tr>
<td>MEM</td>
<td>&nbsp;</td>
<td>Invitrogen</td>
<td>11090</td>
<td>&nbsp;</td>
<tr>
<td>Horse Serum</td>
<td>&nbsp;</td>
<td>Invitrogen</td>
<td>16050</td>
<td>&nbsp;</td>
<tr>
<td>Hepes</td>
<td>&nbsp;</td>
<td>Invitrogen</td>
<td>15630</td>
<td>&nbsp;</td>
<tr>
<td>Glutamine</td>
<td>&nbsp;</td>
<td>Invitrogen</td>
<td>25030</td>
<td>&nbsp;</td>
<tr>
<td>Penicillin/ Streptomycin</td>
<td>&nbsp;</td>
<td>Invitrogen</td>
<td>15140</td>
<td>&nbsp;</td>
<tr>
<td>Superglue</td>
<td>&nbsp;</td>
<td>Krazy Glue</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>6 well / 24 well cell culture plates</td>
<td>&nbsp;</td>
<td>Corning Incorporated</td>
<td>3506/ 3527</td>
<td>&nbsp;</td>
<tr>
<td>30mm culture plate inserts (0.4-&mu;m pore)</td>
<td>&nbsp;</td>
<td>Millipore</td>
<td>PICM03050</td>
<td>&nbsp;</td>
<tr>
<td>Purified NA/LE Hamster anti-mouse CD95 (Jo2)</td>
<td>&nbsp;</td>
<td>BD Pharmingen</td>
<td>554254</td>
<td>&nbsp;</td>
<tr>
<td>In situ cell death detection kit, TMR red</td>
<td>&nbsp;</td>
<td>Roche</td>
<td>12 156 792 910</td>
<td>&nbsp;</td>
<tr>
<td>Rabbit anti-Calbindin D-28k antibody</td>
<td>&nbsp;</td>
<td>Swant</td>
<td>CB-38a</td>
<td>&nbsp;</td>
<tr>
<td>Alexa 488-goat anti-rabbit IgG secondary antibody</td>
<td>&nbsp;</td>
<td>Invitrogen (Molecular probes)</td>
<td>A-11008</td>
<td>&nbsp;</td>
<tr>
<td>Vectashield Mounting Medium with DAPI</td>
<td>&nbsp;</td>
<td>Vector labs</td>
<td>H-1200</td>
<td>&nbsp;</td>
<tr>
<td>Dissecting Microscope</td>
<td>&nbsp;</td>
<td>Zeiss Stemi SV 11</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>Vibratome</td>
<td>&nbsp;</td>
<td>Leica</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<tr>
<td>Confocal Microscope</td>
<td>&nbsp;</td>
<td>Leica TCS SP2 AOBS</td>
<td>&nbsp;</td>
<td>&nbsp;</td>		</tbody>
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organotypic cerebellar cultures: apoptotic challenges and detection

神经组织器官型文化是首次推出由霍格在1947年1,2，已经构成了一个在神经科学领域的重大突破。自那时以来，该技术进一步发展，目前有许多不同的方法来准备器官的文化。这里介绍的方法Stoppini 等描述的适应。片的准备和Gogolla等 。染色过程 3,4 。 这种技术的一个独特功能是它可以让你来研究大脑不同部位如海马或小脑在其原有的结构，提供了分离的文化，所有的细胞组织和神经网络被破坏的一大优势。在小脑的情况下，更是有利的，因为它允许浦肯野细胞的研究，极难获得分离的原代培养。这种方法可用于研究小脑在体外的某些发展特点，以及在野生型和突变小鼠的电生理和药理实验。 这里介绍的方法的目的是要研究，如Fas在发展中国家小脑配体的凋亡刺激的影响，采用TUNEL染色测定细胞凋亡。如果TUNEL染色细胞类型的特定标记，如Calbindin，浦肯野细胞相结合，这是可能的单元格中的特定人群的方式来评价细胞死亡。 Calbindin染色也是评估小脑文化素质的目的。

Watch this Scientific Journal Video about Organotypic Cerebellar Cultures: Apoptotic Challenges and Detection at JoVE.com

Organotypic Cerebellar Cultures: Apoptotic Challenges and Detection

这种方法描述了一代器官小脑文化和不同的小脑细胞类型的可行性某些凋亡刺激的效果。

器官型小脑文化：细胞凋亡的挑战和检测

Organotypic cultures of neuronal tissue were first introduced by Hogue in 1947 1,2 and have constituted a major breakthrough in the field of neuroscience. ...

organotypic-cerebellar-cultures-apoptotic-challenges-and-detection

Research

JoVE Journal

Neuroscience

18.1K 次观看.  The Salk Institute for Biological Studies. 这种方法描述了一代器官小脑文化和不同的小脑细胞类型的可行性某些凋亡刺激的效果。

视频: Organotypic Cerebellar Cultures: Apoptotic Challenges and Detection

Organotypic Hippocampal Slice Cultures

The hippocampus, a component of the limbic system, plays important roles in long-term memory and spatial navigation 1. Hippocampal neurons can modify the strength of their connections after brief periods of strong activation. This phenomenon, known as long-term potentiation (LTP) can last for hours or days and has become the best candidate mechanism for learning and memory 2. In addition, the well defined anatomy and connectivity of the hippocampus 3 has made it a classical model system to study synaptic transmission and synaptic plasticity4.
As our understanding of the physiology of hippocampal synapses grew and molecular players became identified, a need to manipulate synaptic proteins became imperative. Organotypic hippocampal cultures offer the possibility for easy gene manipulation and precise pharmacological intervention but maintain synaptic organization that is critical to understanding synapse function in a more naturalistic context than routine culture dissociated neurons methods.
Here we present a method to prepare and culture hippocampal slices that can be easily adapted to other brain regions. This method allows easy access to the slices for genetic manipulation using different approaches like viral infection 5,6 or biolistics 7. In addition, slices can be easily recovered for biochemical assays 8, or transferred to microscopes for imaging 9 or electrophysiological experiments 10.

We describe a method to prepare organotypic hippocampal slices that can be easily adapted to other brain regions. Brain slices are laid on porous membranes and culture media is allowed to form an interface. This method preserves the gross architecture of the hippocampus for up to 2 weeks in culture.

器官型海马切片培养

The hippocampus, a component of the limbic system, plays important roles in long-term memory and spatial navigation 1. Hippocampal neurons can modify the ...

科研

神经科学

Multi-electrode Array Recordings of Neuronal Avalanches in Organotypic Cultures

The cortex is spontaneously active, even in the absence of any particular input or motor output. During development, this activity is important for the migration and differentiation of cortex cell types and the formation of neuronal connections1. In the mature animal, ongoing activity reflects the past and the present state of an animal into which sensory stimuli are seamlessly integrated to compute future actions. Thus, a clear understanding of the organization of ongoing i.e. spontaneous activity is a prerequisite to understand cortex function. 
Numerous recording techniques revealed that ongoing activity in cortex is comprised of many neurons whose individual activities transiently sum to larger events that can be detected in the local field potential (LFP) with extracellular microelectrodes, or in the electroencephalogram (EEG), the magnetoencephalogram (MEG), and the BOLD signal from functional magnetic resonance imaging (fMRI). The LFP is currently the method of choice when studying neuronal population activity with high temporal and spatial resolution at the mesoscopic scale (several thousands of neurons). At the extracellular microelectrode, locally synchronized activities of spatially neighbored neurons result in rapid deflections in the LFP up to several hundreds of microvolts. When using an array of microelectrodes, the organizations of such deflections can be conveniently monitored in space and time. 
Neuronal avalanches describe the scale-invariant spatiotemporal organization of ongoing neuronal activity in the brain2,3. They are specific to the superficial layers of cortex as established in vitro4,5, in vivo in the anesthetized rat 6, and in the awake monkey7. Importantly, both theoretical and empirical studies2,8-10 suggest that neuronal avalanches indicate an exquisitely balanced critical state dynamics of cortex that optimizes information transfer and information processing.
In order to study the mechanisms of neuronal avalanche development, maintenance, and regulation, in vitro preparations are highly beneficial, as they allow for stable recordings of avalanche activity under precisely controlled conditions. The current protocol describes how to study neuronal avalanches in vitro by taking advantage of superficial layer development in organotypic cortex cultures, i.e. slice cultures, grown on planar, integrated microelectrode arrays (MEA; see also 11-14).

A robust way to study neuronal avalanches, i.e. scale-invariant spatio-temporal activity bursts, indicative of critical state dynamics in cortex. Avalanches emerge spontaneously in developing superficial layers of cultured cortex which allows for long-term measurements of the activity with planar integrated multi-electrode arrays (MEA) under precisely controlled conditions.

器官型培养的神经元雪崩多电极阵列记录

The cortex is spontaneously active, even in the absence of any particular input or motor output.  During development, this activity is important for the ...

Organotypic Slice Cultures of Embryonic Ventral Midbrain: A System to Study Dopaminergic Neuronal Development in vitro

The mouse is an excellent model organism to study mammalian brain development due to the abundance of molecular and genetic data. However, the developing mouse brain is not suitable for easy manipulation and imaging in vivo since the mouse embryo is inaccessible and opaque. Organotypic slice cultures of embryonic brains are therefore widely used to study murine brain development in vitro. Ex-vivo manipulation or the use of transgenic mice allows the modification of gene expression so that subpopulations of neuronal or glial cells can be labeled with fluorescent proteins. The behavior of labeled cells can then be observed using time-lapse imaging. Time-lapse imaging has been particularly successful for studying cell behaviors that underlie the development of the cerebral cortex at late embryonic stages 1-2. Embryonic organotypic slice culture systems in brain regions outside of the forebrain are less well established. Therefore, the wealth of time-lapse imaging data describing neuronal cell migration is restricted to the forebrain 3,4. It is still not known, whether the principles discovered for the dorsal brain hold true for ventral brain areas. In the ventral brain, neurons are organized in neuronal clusters rather than layers and they often have to undergo complicated migratory trajectories to reach their final position. The ventral midbrain is not only a good model system for ventral brain development, but also contains neuronal populations such as dopaminergic neurons that are relevant in disease processes. While the function and degeneration of dopaminergic neurons has been investigated in great detail in the adult and ageing brain, little is known about the behavior of these neurons during their differentiation and migration phase 5. We describe here the generation of slice cultures from the embryonic day (E) 12.5 mouse ventral midbrain. These slice cultures are potentially suitable for monitoring dopaminergic neuron development over several days in vitro. We highlight the critical steps in generating brain slices at these early stages of embryonic development and discuss the conditions necessary for maintaining normal development of dopaminergic neurons in vitro. We also present results from time lapse imaging experiments. In these experiments, ventral midbrain precursors (including dopaminergic precursors) and their descendants were labeled in a mosaic manner using a Cre/loxP based inducible fate mapping system 6.

Organotypic Slice Cultures of Embryonic Ventral Midbrain: A System to Study Dopaminergic Neuronal Development in vitro

A method to generate organotypic slices from the E12.5 murine embryonic midbrain is described. The organotypic slice cultures can be used to observe the behavior of dopaminergic neurons or other ventral midbrain neurons.

胚胎腹侧中脑器官型片文化：一个系统来研究多巴胺能神经元发展在体外</em

The  mouse is an excellent model organism to study mammalian brain development due  to the abundance of molecular and genetic data. However, the ...

The Analysis of Purkinje Cell Dendritic Morphology in Organotypic Slice Cultures

Purkinje cells are an attractive model system for studying dendritic development, because they have an impressive dendritic tree which is strictly oriented in the sagittal plane and develops mostly in the postnatal period in small rodents 3. Furthermore, several antibodies are available which selectively and intensively label Purkinje cells including all processes, with anti-Calbindin D28K being the most widely used. For viewing of dendrites in living cells, mice expressing EGFP selectively in Purkinje cells 11 are available through Jackson labs. Organotypic cerebellar slice cultures cells allow easy experimental manipulation of Purkinje cell dendritic development because most of the dendritic expansion of the Purkinje cell dendritic tree is actually taking place during the culture period 4. We present here a short, reliable and easy protocol for viewing and analyzing the dendritic morphology of Purkinje cells grown in organotypic cerebellar slice cultures. For many purposes, a quantitative evaluation of the Purkinje cell dendritic tree is desirable. We focus here on two parameters, dendritic tree size and branch point numbers, which can be rapidly and easily determined from anti-calbindin stained cerebellar slice cultures. These two parameters yield a reliable and sensitive measure of changes of the Purkinje cell dendritic tree. Using the example of treatments with the protein kinase C (PKC) activator PMA and the metabotropic glutamate receptor 1 (mGluR1) we demonstrate how differences in the dendritic development are visualized and quantitatively assessed. The combination of the presence of an extensive dendritic tree, selective and intense immunostaining methods, organotypic slice cultures which cover the period of dendritic growth and a mouse model with Purkinje cell specific EGFP expression make Purkinje cells a powerful model system for revealing the mechanisms of dendritic development.

We present a protocol that permits to view and to quantitatively asses the morphology of the dendritic tree of individual Purkinje cells grown in organotypic cerebellar slice cultures. This protocol is intended to promote studies on the mechanisms of Purkinje cell dendritic development.

浦肯野细胞树突形态的器官切片培养分析

Purkinje cells are an attractive model system for studying dendritic development, because they have an impressive dendritic tree which is strictly ...

Organotypic Slice Cultures to Study Oligodendrocyte Dynamics and Myelination

NG2 expressing cells (polydendrocytes, oligodendrocyte precursor cells) are the fourth major glial cell population in the central nervous system. During embryonic and postnatal development they actively proliferate and generate myelinating oligodendrocytes. These cells have commonly been studied in primary dissociated cultures, neuron cocultures, and in fixed tissue. Using newly available transgenic mouse lines slice culture systems can be used to investigate proliferation and differentiation of oligodendrocyte lineage cells in both gray and white matter regions of the forebrain and cerebellum. Slice cultures are prepared from early postnatal mice and are kept in culture for up to 1 month. These slices can be imaged multiple times over the culture period to investigate cellular behavior and interactions. This method allows visualization of NG2 cell division and the steps leading to oligodendrocyte differentiation while enabling detailed analysis of region-dependent NG2 cell and oligodendrocyte functional heterogeneity. This is a powerful technique that can be used to investigate the intrinsic and extrinsic signals influencing these cells over time in a cellular environment that closely resembles that found in vivo.

A technique to study NG2 cells and oligodendrocytes using a slice culture system of the forebrain and cerebellum is described. This method allows examination of the dynamics of proliferation and differentiation of cells within the oligodendrocyte lineage where the extracellular environment can be easily manipulated while maintaining tissue cytoarchitecture.

器官切片文化研究少突胶质细胞动力学和髓鞘

NG2 expressing cells (polydendrocytes, oligodendrocyte precursor cells) are the fourth major glial cell population in the central nervous system. During ...

The Analysis of Neurovascular Remodeling in Entorhino-hippocampal Organotypic Slice Cultures

Ischemic brain injury is among the most common and devastating conditions compromising proper brain function and often leads to persisting functional deficits in the affected patients. Despite intensive research efforts, there is still no effective treatment option available that reduces neuronal injury and protects neurons in the ischemic areas from delayed secondary death. Research in this area typically involves the use of elaborate and problematic animal models. Entorhino-hippocampal organotypic slice cultures challenged with oxygen and glucose deprivation (OGD) are established in&#160;vitro models which mimic cerebral ischemia. The novel aspect of this study is that changes of the brain blood vessels are studied in addition to neuronal changes and the reaction of both the neuronal compartment and the vascular compartment can be compared and correlated. The methods presented in this protocol substantially broaden the potential applications of the organotypic slice culture approach. The induction of OGD or hypoxia alone can be applied by rather simple means in organotypic slice cultures and leads to reliable and reproducible damage in the neural tissue. This is in stark contrast to the complicated and problematic animal experiments inducing stroke and ischemia in vivo. By broadening the analysis to include the study of the reaction of the vasculature could provide new ways on how to preserve and restore brain functions. The slice culture approach presented here might develop into an attractive and important tool for the study of ischemic brain injury and might be useful for testing potential therapeutic measures aimed at neuroprotection.

A protocol for entorhino-hippocampal organotypic slice cultures, which allows reproducing many aspects of ischemic brain injury, is presented. By studying changes of the neurovasculature in addition to changes in the neurons, this protocol is a versatile tool to study plastic changes in neural tissue after injury.

神经血管重塑的分析Entorhino，海马脑切片培养

Ischemic brain injury is among the most common and devastating conditions compromising proper brain function and often leads to persisting functional ...

Selective Depletion of Microglia from Cerebellar Granule Cell Cultures Using L-leucine Methyl Ester

Microglia, the resident immunocompetent cells of the CNS, play multifaceted roles in modulating and controlling neuronal function, as well as mediating innate immunity. Primary rodent cell culture models have greatly advanced our understanding of neuronal-glial interactions, but only recently have methods to specifically eliminate microglia from mixed cultures been utilized. One such technique &#8211; described here &#8211; is the use of L-leucine methyl ester, a lysomotropic agent that is internalized by macrophages and microglia, wherein it causes lysosomal disruption and subsequent apoptosis13,14. Experiments using L-leucine methyl ester have the power to identify the contribution of microglia to the surrounding cellular environment under diverse culture conditions. Using a protocol optimized in our laboratory, we describe how to eliminate microglia from P5 rodent cerebellar granule cell culture. This approach allows one to assess the relative impact of microglia on experimental data, as well as determine whether microglia are playing a neuroprotective or neurotoxic role in culture models of neurological conditions, such as stroke, Alzheimer&#8217;s or Parkinson&#8217;s disease.

Microglia can influence neurons and other glia in culture by various non-cell autonomous mechanisms. Here, we present a protocol to selectively deplete microglia from primary neuronal cultures. This method has the potential to elucidate the role of microglial-neuronal interactions, with implications for neurodegenerative conditions where neuroinflammation is a hallmark feature.

小胶质细胞的小脑颗粒细胞使用L-亮氨酸甲酯选择性耗尽

Microglia, the resident immunocompetent cells of the CNS, play multifaceted roles in modulating and controlling neuronal function, as well as mediating ...

Investigating Functional Regeneration in Organotypic Spinal Cord Co-cultures Grown on Multi-electrode Arrays

Adult higher vertebrates have a limited potential to recover from spinal cord injury. Recently, evidence emerged that propriospinal connections are a promising target for intervention to improve functional regeneration. So far, no in vitro model exists that grants the possibility to examine functional recovery of propriospinal fibers. Therefore, a representative model that is based on two organotypic spinal cord sections of embryonic rat, cultured next to each other on multi-electrode arrays (MEAs) was developed. These slices grow and, within a few days in vitro, fuse along the sides facing each other. The design of the used MEAs permits the performance of lesions with a scalpel blade through this fusion site without inflicting damage on the MEAs. The slices show spontaneous activity, usually organized in network activity bursts, and spatial and temporal activity parameters such as the location of burst origins, speed and direction of their propagation and latencies between bursts can be characterized. Using these features, it is also possible to assess functional connection of the slices by calculating the amount of synchronized bursts between the two sides. Furthermore, the slices can be morphologically analyzed by performing immunohistochemical stainings after the recordings. 
Several advantages of the used techniques are combined in this model: the slices largely preserve the original tissue architecture with intact local synaptic circuitry, the tissue is easily and repeatedly accessible and neuronal activity can be detected simultaneously and non-invasively in a large number of spots at high temporal resolution. These features allow the investigation of functional regeneration of intraspinal connections in isolation in vitro in a sophisticated and efficient way.

Here we present a protocol that is based on spinal cord slices cultured on multi-electrode arrays to study functional regeneration of propriospinal connections in vitro.

调查器官脊髓联合培养物中生长多电极阵列功能再生

Adult higher vertebrates have a limited potential to recover from spinal cord injury. Recently, evidence emerged that propriospinal connections are a ...

Organotypic Hippocampal Slice Cultures As a Model to Study Neuroprotection and Invasiveness of Tumor Cells

In organotypic hippocampal slice cultures (OHSC), the morphological and functional characteristics of both neurons and glial cells are well preserved. This model is suitable for addressing different research questions that involve studies on neuroprotection, electrophysiological experiments on neurons, neuronal networks or tumor invasion. The hippocampal architecture and neuronal activity in multisynaptic circuits are well conserved in OHSC, even though the slicing procedure itself initially lesions and leads to formation of a glial scar. The scar formation alters presumably the mechanical properties and diffusive behavior of small molecules, etc. Slices allow the monitoring of time dependent processes after brain injury without animal surgery, and studies on interactions between various brain-derived cell types, namely astrocytes, microglia and neurons under both physiological and pathological conditions. An ambivalent aspect of this model is the absence of blood flow and immune blood cells. During the progression of the neuronal injury, migrating immune cells from the blood play an important role. As those cells are missing in slices, the intrinsic processes in the culture may be observed without external interference. Moreover, in OHSC the composition of the medium-external environment is precisely controlled. A further advantage of this method is the lower number of sacrificed animals compared to standard preparations. Several OHSC can be obtained from one animal making simultaneous studies with multiple treatments in one animal possible. For these reasons, OHSC are well suited to analyze the effects of new protective therapeutics after tissue damage or during tumor invasion. 
The protocol presented here describes a preparation method of OHSC that allows generating highly reproducible, well preserved slices that can be used for a variety of experimental research, like neuroprotection or tumor invasion studies.

Organotypic hippocampal slice cultures (OHSC) represent an in vitro model that simulates the in vivo situation very well. Here we describe a vibratome-based improved slicing protocol to obtain high quality slices for use in assessing the neuroprotective potential of novel substances or the biological behavior of tumor cells.

器官海马切片培养模型研究肿瘤细胞的神经保护和侵袭性

In organotypic hippocampal slice cultures (OHSC), the morphological and functional characteristics of both neurons and glial cells are well preserved. ...

Ex Utero Electroporation and Organotypic Slice Cultures of Embryonic Mouse Brains for Live-Imaging of Migrating GABAergic Interneurons

GABAergic interneurons (INs) are critical components of neuronal networks that drive cognition and behavior. INs destined to populate the cortex migrate tangentially from their place of origin in the ventral telencephalon (including from the medial and caudal ganglionic eminences (MGE, CGE)) to the dorsal cortical plate in response to a variety of intrinsic and extrinsic cues. Different methodologies have been developed over the years to genetically manipulate specific pathways and investigate how they regulate the dynamic cytoskeletal changes required for proper IN migration. In utero electroporation has been extensively used to study the effect of gene repression or overexpression in specific IN subtypes while assessing the impact on morphology and final position. However, while this approach is readily used to modify radially migrating pyramidal cells, it is more technically challenging when targeting INs. In utero electroporation generates a low yield given the decreased survival rates of pups when electroporation is conducted before e14.5, as is customary when studying MGE-derived INs. In an alternative approach, MGE explants provide easy access to the MGE and facilitate the imaging of genetically modified INs. However, in these explants, INs migrate into an artificial matrix, devoid of endogenous guidance cues and thalamic inputs. This prompted us to optimize a method where INs can migrate in a more naturalistic environment, while circumventing the technical challenges of in utero approaches. In this paper, we describe the combination of ex utero electroporation of embryonic mouse brains followed by organotypic slice cultures to readily track, image and reconstruct genetically modified INs migrating along their natural paths in response to endogenous cues. This approach allows for both the quantification of the dynamic aspects of IN migration with time-lapse confocal imaging, as well as the detailed analysis of various morphological parameters using neuronal reconstructions on fixed immunolabeled tissue.

Ex Utero Electroporation and Organotypic Slice Cultures of Embryonic Mouse Brains for Live-Imaging of Migrating GABAergic Interneurons

Here, we provide a low-cost and reliable method to generate electroporated brain organotypic slice cultures from mouse embryos suitable for confocal microscopy and live-imaging techniques.

前子宫内胚胎小鼠脑电穿孔和脊髓切片培养迁移 GABAergic 中间神经元的活体成像

GABAergic interneurons (INs) are critical components of neuronal networks that drive cognition and behavior. INs destined to populate the cortex migrate ...