この作品は、NIH（DC007681、AB）、CTの幹細胞助成（AB）、パーディー財団（AB）、博士号を取得する前のルース·L·キルシュシュタイン国立研究サービス賞（NRSA）（SZY）、およびNSFの大学院研究からの補助金によって支えられてフェローシップ（BL）。我々は、原稿上の有益なコ​​メントをBordey室のメンバーに感謝します。本材料は、部分的にコネチカット幹細胞研究助成金プログラムの下コネチカット州によってサポートされた仕事に基づいています。その内容はもっぱら著者の責任であり、必ずしもコネチカット州の公式見解を示すものではない、コネチカットやCTイノベーションの州の公衆衛生省は、株式会社。

<ol>
	<li>Peretto, P., Giachino, C., Aimar, P., Fasolo, A., Bonfanti, L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Chain+formation+and+glial+tube+assembly+in+the+shift+from+neonatal+to+adult+subventricular+zone+of+the+rodent+forebrain.">Chain formation and glial tube assembly in the shift from neonatal to adult subventricular zone of the rodent forebrain.</a> J. Comp Neurol. 487, 407-427 (2005).</li><li>Lacar, B., Young, S. Z., Platel, J. C., Bordey, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Imaging+and+recording+subventricular+zone+progenitor+cells+in+live+tissue+of+postnatal+mice.">Imaging and recording subventricular zone progenitor cells in live tissue of postnatal mice.</a> Front. Neurosci. 4, 10-3389 (2010).</li><li>Lacar, B., Young, S. Z., Platel, J. C., Bordey, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Gap+junction-mediated+calcium+waves+define+communication+networks+among+murine+postnatal+neural+progenitor+cells.">Gap junction-mediated calcium waves define communication networks among murine postnatal neural progenitor cells.</a> Eur. J. Neurosci. , (2011).</li><li>Platel, J. C., Dave, K. A., Gordon, V., Lacar, B., Rubio, M. E., Bordey, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=NMDA+receptors+activated+by+subventricular+zone+astrocytic+glutamate+are+critical+for+neuroblast+survival+prior+to+entering+a+synaptic+network.">NMDA receptors activated by subventricular zone astrocytic glutamate are critical for neuroblast survival prior to entering a synaptic network.</a> Neuron. 65, 859-872 (2010).</li><li>Platel, J. C., Dupuis, A., Boisseau, S., Villaz, M., Albrieux, M., Brocard, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Synchrony+of+spontaneous+calcium+activity+in+mouse+neocortex+before+synaptogenesis.">Synchrony of spontaneous calcium activity in mouse neocortex before synaptogenesis.</a> Eur. J. Neurosci. 25, 920-928 (2007).</li><li>Young, S. Z., Platel, J. C., Nielsen, J. V., Jensen, N. A., Bordey, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=GABAA+increases+calcium+in+subventricular+zone+astrocyte-like+cells+through+L-+and+T-type+voltage-gated+calcium+channels.">GABAA increases calcium in subventricular zone astrocyte-like cells through L- and T-type voltage-gated calcium channels.</a> Front. Cell. Neurosci. 4, 8 (2010).</li><li>Bolteus, A. J., Bordey, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=GABA+Release+and+Uptake+Regulate+Neuronal+Precursor+Migration+in+the+Postnatal+Subventricular+Zone.">GABA Release and Uptake Regulate Neuronal Precursor Migration in the Postnatal Subventricular Zone.</a> J. Neurosci. 24, 7623-7631 (2004).</li><li>Platel, J., Heintz, T., Young, S., Gordon, V., Bordey, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Tonic+activation+of+GLUK5+kainate+receptors+decreases+neuroblast+migration+in+a+whole+mount+preparation+of+the+subventricular+zone.">Tonic activation of GLUK5 kainate receptors decreases neuroblast migration in a whole mount preparation of the subventricular zone.</a> J. Physiol. (Lond). 586, 3783-3793 (2008).</li><li>Nam, S. C., Kim, Y., Dryanovski, D., Walker, A., Goings, G., Woolfrey, K., Kang, S. S., Chu, C., Chenn, A., Erdelyi, F., Szabo, G., Hockberger, P., Szele, F. G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Dynamic+features+of+postnatal+subventricular+zone+cell+motility:+a+two-photon+time-lapse+study.">Dynamic features of postnatal subventricular zone cell motility: a two-photon time-lapse study.</a> J. Comp. Neurol. 505, 190-208 (2007).</li><li>Lacar, B. L., Platel, J. C., Bordey, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=GABA+controls+Ca2++activity-dependent+network+synchrony+in+the+adult+neurogenic+forebrain.">GABA controls Ca2+ activity-dependent network synchrony in the adult neurogenic forebrain.</a> , (2007).</li><li>Liu, X., Bolteus, A. J., Balkin, D. M., Henschel, O., Bordey, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=GFAP-expressing+cells+in+the+postnatal+subventricular+zone+display+a+unique+glial+phenotype+intermediate+between+radial+glia+and+astrocytes.">GFAP-expressing cells in the postnatal subventricular zone display a unique glial phenotype intermediate between radial glia and astrocytes.</a> Glia. 54, 394-410 (2006).</li><li>Wang, D. D., Krueger, D. D., Bordey, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Biophysical+properties+and+ionic+signature+of+neuronal+progenitors+of+the+postnatal+subventricular+zone+in+situ.">Biophysical properties and ionic signature of neuronal progenitors of the postnatal subventricular zone in situ.</a> J. Neurophysiol. 90, 2291-2302 (2003).</li><li>Tian, L., Hires, S. A., Mao, T., Huber, D., Chiappe, M. E., Chalasani, S. H., Petreanu, L., Akerboom, J., McKinney, S. A., Schreiter, E. R., Bargmann, C. I., Jayaraman, V., Svoboda, K., Looger, L. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Imaging+neural+activity+in+worms,+flies+and+mice+with+improved+GCaMP+calcium+indicators.">Imaging neural activity in worms, flies and mice with improved GCaMP calcium indicators.</a> Nat. Methods. 6, 875-881 (2009).</li><li>Zhao, Y., Araki, S., Wu, J., Teramoto, T., Chang, Y. F. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=An+expanded+palette+of+genetically+encoded+Ca(2)+indicators.">An expanded palette of genetically encoded Ca(2) indicators.</a> Science. 333, 1888-1891 (2011).</li><li>Shigetomi, E., Kracun, S., Sofroniew, M. V., Khakh, B. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+genetically+targeted+optical+sensor+to+monitor+calcium+signals+in+astrocyte+processes.">A genetically targeted optical sensor to monitor calcium signals in astrocyte processes.</a> Nat. Neurosci. 13, 759-766 (2010).</li></ol>

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SVZ細胞のカルシウムイメージングは、神経芽細胞10、両方の神経芽細胞およびアストロサイト4,6,8とアストロサイトのカルシウム波3受容体チャネル発現における自発活動のパターンを研究するために使用されています。 SVZにおける細胞はどちら未熟であるか、またはグリア特性を持っているので、彼らは成熟したネットワークでの活動を示す電位におけるミリ秒の変...

<table border="1"><tbody><tr><td> 溶質 </td><td> 会社 </td><td> カタログ番号 </td><td> 郭（MM） </td></tr><tr><td>スクロース</td><td>シグマ</td><td> S0389 </td><td>解剖：147 mMの ACSF：0 mMの</td></tr><tr><td> NaClを</td><td>シグマ</td><td> S9888 </td><td>解剖：42ミリメートル ACSF：126 mMの</td></tr><tr><td> KClを</td><td>シグマ</td><td> P3911 </td><td>解剖：2.5mMの ACSF：2.5mMの</td></tr><tr><td>のMgCl 2·6H 2 O </td><td>シグマ</td><td> M9272 </td><td>解剖：4.33 mMの ACSF：1mMの</td></tr><tr><td>のNaH 2 PO 4·H 2 O </td><td>シグマ</td><td> S8282 </td><td>解剖：1.25 mMの ACSF：1.25 mMの</td></tr><tr><td>グルコース</td><td>シグマ</td><td> G8270 </td><td> Dissection：10mMの ACSF：10mMの</td></tr><tr><td> NaHCO 3を </td><td>シグマ</td><td> S6014 </td><td>解剖：26 mMの ACSF：26 mMの</td></tr><tr><td>のCaCl 2·2H 2 O </td><td>シグマ</td><td> C3306 </td><td>解剖：1.33 mMの ACSF：2 mMの</td></tr></tbody></table> 表1化学物質リストおよび解剖ソリューションとACSFのレシピ。 <table border="1"><tbody><tr><td></td><td></td><td></td><td> [ヘッダ] </td></tr><tr><td> 名前 </td><td> 会社 </td><td> カタログ番号 </td><td> 注釈 </td></tr><tr><td>ビブラトーム</td><td>ライカ</td><td>バーモント1000S </td><td></td></tr><tr><td>スーパー接着剤</td><td> Sureholdまたは3M </td><td> Surehold 3Gスーパー接着剤または3M獣医ボンド</td><td></td></tr><tr><td>解剖ツール</td><td> Robozまたはテッドペラ</td><td></td><td></td></tr><tr><td>のFluo-4 AMのカルシウム感受性色素</td><td>インビトロジェン</td><td> F14201 </td><td></td></tr><tr><td>オレゴングリーンBAPTA-1、AMカルシウム感受性色素</td><td>インビトロジェン</td><td> O6807 </td><td></td></tr><tr><td> DMSO中プルロニックF-127の20％溶液</td><td>インビトロジェン</td><td> P3000MP </td><td></td></tr><tr><td>直立共焦点顕微鏡</td><td>オリンポス</td><td> FV300またはFV1000 </td><td></td></tr><tr><td>水浸目標</td><td>オリンポス</td><td> LUMPlanFl 40×幅/ IR（NA 0.80）; LUMPlanFl 60×W / I（NA 0.90） </td><td></td></tr><tr><td>マイクロマニピュレーター</td><td>サッター</td><td> MPC-200/MPC-325/MPC-385 </td><td></td></tr><tr><td>圧力コントローラ&lt;/ TD&gt; <td>パーカー·ハネフィン</td><td> Picospritzer </td><td>塗布時&lt;3 PSI </td></tr><tr><td>ピペットプラー</td><td>サッターまたはNarshige </td><td>サッターのP-97またはNarshige PP-830 </td><td></td></tr><tr><td>ガラスピペット</td><td>サッター</td><td> BF150-110から10 </td><td> ID：1.10、外径：1.50 </td></tr><tr><td>蠕動ポンプ</td><td>ハーバード装置</td><td>モデル720 </td><td>流速：1ml /分</td></tr><tr><td>商工会議所のお風呂</td><td>ワーナー·インスツルメンツ</td><td> RC-26のGLP </td><td>ロープロファイルには、客観的なクリアランスが可能</td></tr><tr><td>管類</td><td>タイゴン</td><td></td><td></td></tr><tr><td>温度調節器</td><td>ワーナー·インスツルメンツ</td><td> TC-324B/344B </td><td></td></tr></tbody></table> 表2。材料/機器リスト。

preparation of acute subventricular zone slices for calcium imaging

脳室下帯（SVZ）は、出生後の脳内の2つの神経原性のゾーンの一つである。 SVZは、アストロサイトの機能（SVZアストロサイトと呼ばれます）、神経芽細胞、中間前駆細胞と神経前駆細胞を含む密集した細胞などを持っている。 SVZで生まれた神経芽細胞は接線方向に、彼らは介在ニューロンに分化する嗅球への偉大な距離を移行します。接着分子と拡散信号を介して細胞間のシグナル伝達はニューロン新生の制御において重要な役割を果たしている。これらの信号の多くは、細胞の内側との間で情報を伝達する細胞内カルシウム活性を誘発する。カルシウム活性は、細胞外シグナルの活性こうして反射性であり、SVZ細胞間の機能的な細胞間シグナル伝達を理解するための最適な方法です。 カルシウム活性は成熟したアストロサイトとニューロンを含む他の多くの地域との細胞型で研究されている。しかし、LOAに伝統的な方法カルシウムインジケーター色素（ すなわち浴ローディング）とdの細胞はすべてSVZ細胞型をロードするには効率的ではありませんでした。実際、SVZにおける細胞密度は、組織内部で染料拡散を妨げる。また、矢状スライスを準備した方が特にSVZ細胞、吻側 - 尾軸の神経芽細胞の移行の流れの3次元配列を保持します。 ここでは、SVZ、カルシウムインジケーター色素とSVZ細胞の読み込みや、タイムラプスムービーカルシウム活性の買収を含む矢状切片を作製するための方法を説明します。私達はのFluo-4を使用した組織内部の圧力アプリケーションを使用して、SVZアストロサイトをロードするための染料AM。カルシウム活性には、識別のための個々の細胞のための正確な分解能を可能走査型共焦点顕微鏡を用いて記録した。我々のアプローチは、成人の海馬下帯や胚神経性ゾーンを含む他の神経性のゾーンに適用されます。また、染料の他の種類のことができます記載された方法を使用して適用する。

Watch this Scientific Journal Video about Preparation of Acute Subventricular Zone Slices for Calcium Imaging at JoVE.com

Preparation of Acute Subventricular Zone Slices for Calcium Imaging

記録カルシウム活性のためのカルシウムインジケーター色素と脳室下帯（SVZ）細胞をロードする方法について説明する。生後SVZは、神経前駆細胞および神経芽細胞を含む、密に詰まった細胞が含まれています。むしろ風呂ローディングを使用するよりも、我々はより良​​い染料拡散を可能にする組織内部の圧力によって色素を注入した。

カルシウムイメージングの急性脳室下帯スライスの調製

The subventricular zone (SVZ) is one of the two neurogenic zones in the postnatal brain. The SVZ contains densely packed cells, including neural ...

preparation-of-acute-subventricular-zone-slices-for-calcium-imaging

Research

JoVE Journal

Neuroscience

13.1K ビュー.  Yale University School of Medicine. 記録カルシウム活性のためのカルシウムインジケーター色素と脳室下帯（SVZ）細胞をロードする方法について説明する。生後SVZは、神経前駆細胞および神経芽細胞を含む、密に詰まった細胞が含まれています。むしろ風呂ローディングを使用するよりも、我々はより良​​い染料拡散を可能にする組織内部の圧力によって色素を注入した。

ビデオ: Preparation of Acute Subventricular Zone Slices for Calcium Imaging

The Subventricular Zone En-face: Wholemount Staining and Ependymal Flow

The walls of the lateral ventricles contain the largest germinal region in the adult mammalian brain. The subventricular zone (SVZ) in these walls is an extensively studied model system for understanding the behavior of neural stem cells and the regulation of adult neurogenesis. Traditionally, these studies have relied on classical sectioning techniques for histological analysis. Here we present an alternative approach, the wholemount technique, which provides a comprehensive, en-face view of this germinal region. Compared to sections, wholemounts preserve the complete cytoarchitecture and cellular relationships within the SVZ. This approach has recently revealed that the adult neural stem cells, or type B1 cells, are part of a mixed neuroepithelium with differentiated ependymal cells lining the lateral ventricles. In addition, this approach has been used to study the planar polarization of ependymal cells and the cerebrospinal fluid flow they generate in the ventricle. With recent evidence that adult neural stem cells are a heterogeneous population that is regionally specified, the wholemount approach will likely be an essential tool for understanding the organization and parcellation of this stem cell niche.

The lateral ventricle walls contain the largest germinal region in the adult mammalian brain. Traditionally, studies on neurogenesis in this region have relied on classical sectioning techniques for histological analysis. Here we present an alternative approach, the wholemount technique, which provides a comprehensive, en-face view of this germinal region.

脳室下帯恩顔：Wholemount染色と上衣の流れ

The walls of the lateral ventricles contain the largest germinal region in the adult mammalian brain. The subventricular zone (SVZ) in these walls is an ...

神経科学

Neonatal Subventricular Zone Electroporation

Neural stem cells (NSCs) line the postnatal lateral ventricles and give rise to multiple cell types which include neurons, astrocytes, and ependymal cells1. Understanding the molecular pathways responsible for NSC self-renewal, commitment, and differentiation is critical for harnessing their unique potential to repair the brain and better understand central nervous system disorders. Previous methods for the manipulation of mammalian systems required the time consuming and expensive endeavor of genetic engineering at the whole animal level2. Thus, the vast majority of studies have explored the functions of NSC molecules in vitro or in invertebrates.
Here, we demonstrate the simple and rapid technique to manipulate neonatal NPCs that is referred to as neonatal subventricular zone (SVZ) electroporation. Similar techniques were developed a decade ago to study embryonic NSCs and have aided studies on cortical development3,4 . More recently this was applied to study the postnatal rodent forebrain5-7. This technique results in robust labeling of SVZ NSCs and their progeny. Thus, postnatal SVZ electroporation provides a cost and time effective alternative for mammalian NSC genetic engineering.

We demonstrate a minimally invasive technique referred to as neonatal subventricular zone electroporation. The technique consists of injecting plasmid DNA into the lateral ventricles of neonatal pups and applying electrical current to deliver and genetically manipulate neural stem cells

新生児の脳室下帯のエレクトロ

Neural stem cells (NSCs) line the postnatal lateral ventricles and give rise to multiple cell types which include neurons, astrocytes, and ependymal ...

In vivo Postnatal Electroporation and Time-lapse Imaging of Neuroblast Migration in Mouse Acute Brain Slices

The subventricular zone (SVZ) is one of the main neurogenic niches in the postnatal brain. Here, neural progenitors proliferate and give rise to neuroblasts able to move along the rostral migratory stream (RMS) towards the olfactory bulb (OB). This long-distance migration is required for the subsequent maturation of newborn neurons in the OB, but the molecular mechanisms regulating this process are still unclear. Investigating the signaling pathways controlling neuroblast motility may not only help understand a fundamental step in neurogenesis, but also have therapeutic regenerative potential, given the ability of these neuroblasts to target brain sites affected by injury, stroke, or degeneration.
In this manuscript we describe a detailed protocol for in vivo postnatal electroporation and subsequent time-lapse imaging of neuroblast migration in the mouse RMS. Postnatal electroporation can efficiently transfect SVZ progenitor cells, which in turn generate neuroblasts migrating along the RMS. Using confocal spinning disk time-lapse microscopy on acute brain slice cultures, neuroblast migration can be monitored in an environment closely resembling the in vivo condition. Moreover, neuroblast motility can be tracked and quantitatively analyzed. As an example, we describe how to use in vivo postnatal electroporation of a GFP-expressing plasmid to label and visualize neuroblasts migrating along the RMS. Electroporation of shRNA or CRE recombinase-expressing plasmids in conditional knockout mice employing the LoxP system can also be used to target genes of interest. Pharmacological manipulation of acute brain slice cultures can be performed to investigate the role of different signaling molecules in neuroblast migration. By coupling in vivo electroporation with time-lapse imaging, we hope to understand the molecular mechanisms controlling neuroblast motility and contribute to the development of novel approaches to promote brain repair.

In vivo Postnatal Electroporation and Time-lapse Imaging of Neuroblast Migration in Mouse Acute Brain Slices

Neuroblast migration is a fundamental event in postnatal neurogenesis. We describe a protocol for efficient labeling of neuroblasts by in vivo postnatal electroporation and subsequent visualization of their migration using time-lapse imaging of acute brain slices. We include a description for the quantitative analysis of neuroblast dynamics by video tracking.

生体産後エレクトロポレーションおよびマウスの急性脳スライスにおける神経芽細胞移動のタイムラプスイメージング中

The subventricular zone (SVZ) is one of the main neurogenic niches in the postnatal brain. Here, neural progenitors proliferate and give rise to ...

Cell Sorting of Neural Stem and Progenitor Cells from the Adult Mouse Subventricular Zone and Live-imaging of their Cell Cycle Dynamics

Neural stem cells (NSCs) in the subventricular zone of the lateral ventricles (SVZ) sustain olfactory neurogenesis throughout life in the mammalian brain. They successively generate transit amplifying cells (TACs) and neuroblasts that differentiate into neurons once they integrate the olfactory bulbs. Emerging fluorescent activated cell sorting (FACS) techniques have allowed the isolation of NSCs as well as their progeny and have started to shed light on gene regulatory networks in adult neurogenic niches. We report here a cell sorting technique that allows to follow and distinguish the cell cycle dynamics of the above-mentioned cell populations from the adult SVZ with a LeX/EGFR/CD24 triple staining. Isolated cells are then plated as adherent cells to explore in details their cell cycle progression by time-lapse video microscopy. To this end, we use transgenic Fluorescence Ubiquitination Cell Cycle Indicator (FUCCI) mice in which cells are red-fluorescent during G1 phase due to a G1 specific red-Cdt1 reporter. This method has recently revealed that proliferating NSCs progressively lengthen their G1 phase during aging, leading to neurogenesis impairment. This method is easily transposable to other systems and could be of great interest for the study of the cell cycle dynamics of brain cells in the context of brain pathologies.

We report a Fluorescent Activated Cell Sorting (FACS)-based method to isolate neural stem cells (NSCs) and their progeny from the subventricular zone (SVZ) of the adult mouse brain. Applied to Fluorescence Ubiquitination Cell Cycle Indicator (FUCCI) transgenic mice, it allows the study of cell cycle progression by live imaging.

セル成体マウス脳室下帯から神経幹細胞および前駆細胞の選別とその細胞周期ダイナミクスのライブイメージング

Neural stem cells (NSCs) in the subventricular zone of the lateral ventricles (SVZ) sustain olfactory neurogenesis throughout life in the mammalian brain. ...

Preparation of Acute Brain Slices Using an Optimized N-Methyl-D-glucamine Protective Recovery Method

This protocol is a practical guide to the N-methyl-D-glucamine (NMDG) protective recovery method of brain slice preparation. Numerous recent studies have validated the utility of this method for enhancing neuronal preservation and overall brain slice viability. The implementation of this technique by early adopters has facilitated detailed investigations into brain function using diverse experimental applications and spanning a wide range of animal ages, brain regions, and cell types. Steps are outlined for carrying out the protective recovery brain slice technique using an optimized NMDG artificial cerebrospinal fluid (aCSF) media formulation and enhanced procedure to reliably obtain healthy brain slices for patch clamp electrophysiology. With this updated approach, a substantial improvement is observed in the speed and reliability of gigaohm seal formation during targeted patch clamp recording experiments while maintaining excellent neuronal preservation, thereby facilitating challenging experimental applications. Representative results are provided from multi-neuron patch clamp recording experiments to assay synaptic connectivity in neocortical brain slices prepared from young adult transgenic mice and mature adult human neurosurgical specimens. Furthermore, the optimized NMDG protective recovery method of brain slicing is compatible with both juvenile and adult animals, thus resolving a limitation of the original methodology. In summary, a single media formulation and brain slicing procedure can be implemented across various species and ages to achieve excellent viability and tissue preservation.

Preparation of Acute Brain Slices Using an Optimized N-Methyl-D-glucamine Protective Recovery Method

This protocol demonstrates the implementation of an optimized N-methyl-D-glucamine (NMDG) protective recovery method of brain slice preparation. A single media formulation is used to reliably obtain healthy brain slices from animals of any age and for diverse experimental applications.

最適化されたNを使用して急性脳スライスの準備-メチル-D-glucamine 保護回復法

This protocol is a practical guide to the N-methyl-D-glucamine (NMDG) protective recovery method of brain slice preparation. Numerous recent studies have ...

Prolonged Incubation of Acute Neuronal Tissue for Electrophysiology and Calcium-imaging

Acute neuronal tissue preparations, brain slices and retinal wholemount, can usually only be maintained for 6 - 8 h following dissection. This limits the experimental time, and increases the number of animals that are utilized per study. This limitation specifically impacts protocols such as calcium imaging that require prolonged pre-incubation with bath-applied dyes. Exponential bacterial growth within 3 - 4 h after slicing is tightly correlated with a decrease in tissue health. This study describes a method for&#160;limiting the proliferation of bacteria in acute preparations to maintain viable neuronal tissue for prolonged periods of time (&#62;24 h) without the need for antibiotics, sterile procedures, or tissue culture media containing growth factors. By cycling the extracellular fluid through UV irradiation and keeping the tissue in a custom holding chamber at 15 - 16 &#176;C, the tissue shows no difference in electrophysiological properties, or calcium signaling through intracellular calcium dyes at &#62;24 h postdissection. These methods will not only extend experimental time for those using acute neuronal tissue, but will reduce the number of animals required to complete experimental goals, and will set a gold standard for acute neuronal tissue incubation.

Once removed from the body, neuronal tissue is greatly affected by environmental conditions, leading to eventual degradation of the tissue after 6 - 8 h. Using a unique incubation method, which closely monitors and regulates the extracellular environment of the tissue, tissue viability can be significantly extended for &#62;24 h.

電気生理学およびカルシウムイメージングのための急性神経組織の長期のインキュベーション

Acute neuronal tissue preparations, brain slices and retinal wholemount, can usually only be maintained for 6 - 8 h following dissection. This limits the ...

Two-photon Calcium Imaging in Neuronal Dendrites in Brain Slices

Calcium (Ca2+) imaging is a powerful tool to investigate the spatiotemporal dynamics of intracellular Ca2+ signals in neuronal dendrites. Ca2+ fluctuations can occur through a variety of membrane and intracellular mechanisms and play a crucial role in the induction of synaptic plasticity and regulation of dendritic excitability. Hence, the ability to record different types of Ca2+ signals in dendritic branches is valuable for groups studying how dendrites integrate information. The advent of two-photon microscopy has made such studies significantly easier by solving the problems inherent to imaging in live tissue, such as light scattering and photodamage. Moreover, through combination of conventional electrophysiological techniques with two-photon Ca2+ imaging, it is possible to investigate local Ca2+ fluctuations in neuronal dendrites in parallel with recordings of synaptic activity in soma. Here, we describe how to use this method to study the dynamics of local Ca2+ transients (CaTs) in dendrites of GABAergic inhibitory interneurons. The method can be also applied to studying dendritic Ca2+ signaling in different neuronal types in acute brain slices.

We present a method combining whole-cell patch-clamp recordings and two-photon imaging to record Ca2+ transients in neuronal dendrites in acute brain slices.

脳スライスにおける神経樹状突起における 2 光子カルシウム イメージング

Calcium (Ca2+) imaging is a powerful tool to investigate the spatiotemporal dynamics of intracellular Ca2+ signals in neuronal dendrites. Ca2+ ...

Preparation of Acute Spinal Cord Slices for Whole-cell Patch-clamp Recording in Substantia Gelatinosa Neurons

Recent whole-cell patch-clamp studies from substantia gelatinosa (SG) neurons have provided a large body of information about the spinal mechanisms underlying sensory transmission, nociceptive regulation, and chronic pain or itch development. Implementations of electrophysiological recordings together with morphological studies based on the utility of acute spinal cord slices have further improved our understanding of neuronal properties and the composition of local circuitry in SG. Here, we present a detailed and practical guide for the preparation of spinal cord slices and show representative whole-cell recording and morphological results. This protocol permits ideal neuronal preservation and can mimic in vivo conditions to a certain extent. In summary, the ability to obtain an in vitro preparation of spinal cord slices enables stable current- and voltage-clamp recordings and could thus facilitate detailed investigations into the intrinsic membrane properties, local circuitry and neuronal structure using diverse experimental approaches.

Here, we describe the essential steps for whole-cell patch-clamp recordings made from substantia gelatinosa (SG) neurons in the in vitro spinal cord slice. This method allows the intrinsic membrane properties, synaptic transmission and morphological characterization of SG neurons to be studied.

膠様質ニューロンの細胞パッチク ランプ記録のため急性脊髄スライスの準備

Recent whole-cell patch-clamp studies from substantia gelatinosa (SG) neurons have provided a large body of information about the spinal mechanisms ...

Preparation of Acute Human Hippocampal Slices for Electrophysiological Recordings

Epilepsy affects about 1% of the world population and leads to a severe decrease in quality of life due to ongoing seizures as well as high risk for sudden death. Despite an abundance of available treatment options, about 30% of patients are drug-resistant. Several novel therapeutics have been developed using animal models, though the rate of drug-resistant patients remains unaltered. One of probable reasons is the lack of translation between rodent models and humans, such as a weak representation of human pharmacoresistance in animal models. Resected human brain tissue as a preclinical evaluation tool has the advantage to bridge this translational gap. Described here is a method for high quality preparation of human hippocampal brain slices and subsequent stable induction of epileptiform activity. The protocol describes the induction of burst activity during application of 8 mM KCl and 4-aminopyridin. This activity is sensitive to established AED lacosamide or novel antiepileptic candidates, such as dimethylethanolamine (DMEA). In addition, the method describes induction of seizure-like events in CA1 of human hippocampal brain slices by reduction of extracellular Mg2+ and application of bicuculline, a GABAA receptor blocker. The experimental set-up can be used to screen potential antiepileptic substances for their effects on epileptiform activity. Furthermore, mechanisms of action postulated for specific compounds can be validated using this approach in human tissue (e.g., using patch-clamp recordings). To conclude, investigation of vital human brain tissue ex vivo (here, resected hippocampus from patients suffering from temporal lobe epilepsy) will improve the current knowledge of physiological and pathological mechanisms in the human brain.

The presented protocol describes the transport and preparation of resected human hippocampal tissue with the ultimate goal to use vital brain slices as a preclinical evaluation tool for potential antiepileptic substances.

電気生理学的記録のための急性ヒト海馬スライスの調製

Epilepsy affects about 1% of the world population and leads to a severe decrease in quality of life due to ongoing seizures as well as high risk for ...

<meta charset="utf8"></head><body>マウス脳室内領域から単離されたNSCの効率的なヌクレオフェクション

Isolation, Expansion, and Nucleofection of Neural Stem Cells from Adult Murine Subventricular Zone

Isolation and expansion of neural stem cells (NSCs) from the subventricular zone (SVZ) of the adult mouse brain can be achieved in a medium supplemented with basic fibroblast growth factor (bFGF) and epidermal growth factor (EGF) as mitogens, producing clonal aggregates known as neurospheres. This in vitro system is a valuable tool for studying NSC potential. Transfection of siRNAs or genes carried in plasmids can be used to induce perturbations to gene expression and study NSC biology. However, the exogenous nucleic acid delivery to NSC cultures is challenging due to the low efficiency of central nervous system (CNS) cells transfection. Here, we present an improved nucleofection system that achieves high efficiency of gene delivery in expanded NSCs from adult murine SVZ. We demonstrate that this relatively simple method enhances gene perturbation in adult NSCs, surpassing traditional transfection protocols with survival rates exceeding 80%. Moreover, this method can also be applied in primary isolated NSCs, providing a crucial advancement in gene function studies through gene expression manipulation via knockdown or overexpression in neurosphere cultures.

<meta charset="utf8"></head><body>著者スポットライト:マウス脳室下ゾーン由来神経幹細胞培養における高効率遺伝子導入のためのヌクレオフェクションの改善

Here, we describe a nucleofection system designed to enhance gene delivery efficiency in expanded neural stem cells (NSCs) isolated from the adult murine subventricular zone. The findings demonstrate that this method significantly improves gene perturbation in NSCs, surpassing the effectiveness of traditional transfection protocols and enhancing cell survival rate.

成体マウス脳室下領域からの神経幹細胞の単離、増殖、およびヌクレオフェクション

Isolation and expansion of neural stem cells (NSCs) from the subventricular zone (SVZ) of the adult mouse brain can be achieved in a medium supplemented ...