この研究は、関節炎および国立衛生研究所の筋骨格系と皮膚病研究所の学内研究プログラムによってサポートされていました。

1。全血のコレクション<ol><li>影響を受ける個人だけでなく、年齢や性別健常対照の末梢血10mLのの最小値を取得します。静脈血は、ヘパリンナトリウムバキュテイナ採血管に集め、ではなく、ヘパリンナトリウムとの適切な混合を確実にするためにEDTAのような他の抗凝固剤、および反転数回使用する必要があります。 10mLのがこの特定のアッセイのために二重にメッキのサンプルに必要な全血の最小量であることに注意してください。 </li><li>サンプルは、最良の結果を得るために収集した後、できるだけ早く処理されるべきです。最大24時間（2）処理される準備が整うまでのためにしかし、ヘパリン加血液は、薄暗い照明の下、室温で保存することができます。 </li></ol> 2。全血の調製<ol><li>室温で10分間3000rpmで（ブレーキ付きオフ）ですべての血液サンプルを遠心してください。バフィコートを乱すことなく、プラズマは上部から採取することができると他の実験的な目的のために保存されます。血漿サンプルは、一時的に-20℃または-80℃で長期保管のために保存することができます。 </li><li>いったんプラズマが収集され、赤血球（RBC）無血清（不完全な）RPMI 1640培地（周囲温度で）でペレットとバフィコートを再懸濁することにより試料を洗浄する。ゆっくりとコレクションチューブに混合物をピペットで、50 mLコニカルチューブに移す。 </li><li>まで不完全RPMI 1640培地50 mLに、ゆっくりと均一な混合物を作成するためにチューブを反転させるボリューム。 10分のために3000回転（ブレーキ付きオフ）でサンプルを遠心分離します。バフィコートを乱さないように注意しながら、上清を吸引、明確に分離があることを確認して作る。この手順を全ての汚染物質と結合したサイトカインを刺激する前に除去されることを保証するために2-4回繰り返します。 </li><li>最後の洗浄の後、総体積が不完全RPMI 1640培地で20 mLの（全血10mLのために最初に描画される）になるように、RBCペレットおよびバフィーコートを再懸濁します。総ボリュームはDISABLED採血の量に基づいて調整することができます。 </li><li> Cellometerビジョンを使用して、希釈した血液は、アクリジンオレンジ（AO）を使用して白血球数のオプションを選択することで、赤血球を溶解することなくカウントすることができます。一部のAOと一部希釈した血液を追加し、使い捨ての計数室に1:1の混合物20μLをロードする。希釈後のAOの最終濃度は、1μg/mlのはずです。 </li><li> 2.0 × 10 6細胞/ mlの最終細胞濃度に不完全なRPMI 1640培地で適宜調整してください。 </li></ol> 3。全血の刺激<ol><li>アッセイは、4つの条件（重複で行われた各）の最小値が必要：無刺激、LPS単独で、ATP単独での加算の加算を、そして最終的にLPSを加えたATPは加算さ。 24ウェル組織培養プレートの適切なウェルに調製した2.0 × 10 6細胞/ mLの希釈全血1mLを追加します。 </li><li>覚せい剤は、刺激アッセイを開始する前に再構成し、室温に立ち上げることが必要。凍結乾燥LPSおよびATPは製造業者の指示に従って再構成されるべきである。再構成に続いて、LPSおよびATPは、さらに不完全なRPMI1640培地を使用して適正在庫の濃度に希釈することができる。 </li><li>よくそうLPSの最終的な作業濃度が1μg/ mLとなることLPSするだけでなく、LPSに加えてATPにLPSを追加。総刺激時間は3時間です。しかし、全血を2時間40分LPSで刺激される。サンプルは37℃、5％CO 2インキュベーター内に配置する必要があります。 </li><li> ATPは、3時間の刺激期間の残り20分間の間に追加されます。 ATP単独およびインキュベーターにおけるLPSとATPだけでなく、場所のサンプルにATPを追加。 ATPの最終的な作業濃度は2mmです。 </li><li> 3時間のインキュベーション期間の後、1.5 mlのマイクロチューブに各サンプルを小分けし、その後室温で2分間、10000回転で試料を遠心分離によって上清を集める。新しい1.5 mlチューブの別のセットに上清を移す。 </li><li>サンプルはすぐに一時的に-20℃または-80℃で長期保存に関してアッセイまたは保存することができます。 </li></ol> 4。サイトカインアッセイ<ol><li>凍結された試料は、分析前に室温に平衡化する必要があります。 IL -1βcanのサイトカイン濃度は、さまざまな方法を用いて評価する。我々は、ベンダの指示に従って、バイオプレックス200システムでXプレックスアッセイバイオプレックスProのヒトサイトカインを利用する。このプロトコルでは、特にIL -1βを測定しているが、我々は、同時に少量のサンプル量を使用することの利点を使用すると、ワンアッセイで複数のサイトカインを測定するために、この多重サイトカインアッセイを利用しています。 </li></ol> 5。代表的な結果 LPSとATPとの正常な刺激によりIL -1β産生の解析は何を示していますSE刺激される細胞の数に依存して応答。我々は、2.0 × 10 6細胞/ mLのIL -1βの最適化と測定可能な濃度だけでなく、他のサイトカイン（図2）を生成するのに十分な濃度であることを見出した。 全血アッセイは、自己炎症症状を呈する患者を研究するのに有用である。これらの患者は、LPS単独で（図3）による刺激によりIL -1βの過剰産生（対照と比較した場合）によって特徴付けることができる自然免疫系、に欠陥が表示されることがあります。 <img src="/files/ftp_upload/2662/2662fig1.jpg" alt="図1" /> 図1。希釈全血サンプル中の細胞濃度を決定するために使用される核白血球のAO染色の代表的なイメージ。 <img src="/files/ftp_upload/2662/2662fig2.jpg" alt="図2" /> 図2 IL -1β産生は増加する細胞の濃度でLPS刺激時に ​​健康なドナーから全血上清で測定。サンプルは三重にアッセイされた。 <img src="/files/ftp_upload/2662/2662fig3.jpg" alt="図3" /> 図3。2人の健常正常コントロールと同様にIL -1β関連自己炎症症状を呈する患者2人から全血上清中で測定されたIL -1β分泌の代表的な結果。

<ol>
	<li>Martinon, F., Mayor, A., Tschopp, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+inflammasomes:+guardians+of+the+body.">The inflammasomes: guardians of the body.</a> Annu Rev Immunol. 27, 229-265 (2009).</li><li>Thurm, C. W., Halsey, J. F. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Measurement+of+cytokine+production+using+whole+blood.">Measurement of cytokine production using whole blood.</a> Curr Protoc Immunol. 66, 7-18 .</li><li>Mariathasan, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Cryopyrin+activates+the+inflammasome+in+response+to+toxins+and+ATP.">Cryopyrin activates the inflammasome in response to toxins and ATP.</a> Nature. 440, 228-232 (2006).</li><li>Gabay, C., Lamacchia, C., Palmer, G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=IL-1+pathways+in+inflammation+and+human+diseases.">IL-1 pathways in inflammation and human diseases.</a> Nat Rev Rheumatol. 4, 232-241 (2010).</li><li>Franchi, L., Elgenbrod, T., Mu&#241;oz-Planillo, R., Nu&#241;ez, G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+inflammasome:+a+caspase-1-activation+platform+that+regulates+immune+responses+and+disease+pathogenesis.">The inflammasome: a caspase-1-activation platform that regulates immune responses and disease pathogenesis.</a> Nat Immunol. 3, 241-247 (2009).</li><li>Sims, J. E., Smith, D. E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+IL-1+family:+regulators+of+immunity.">The IL-1 family: regulators of immunity.</a> Nat Rev Immunol. 2, 89-102 (2010).</li><li>Haug, R., Jo&#248;, G. B., Westvik, A. B., Kierulf, P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Chemokine+production+and+pattern+recognition+receptor+(PRR)+expression+in+whole+blood+stimulated+with+pathogen-associated+molecular+patterns+(PAMPs.">Chemokine production and pattern recognition receptor (PRR) expression in whole blood stimulated with pathogen-associated molecular patterns (PAMPs.</a> Cytokine. 32, 304-315 (2005).</li><li>Netea, M. G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Differential+requirement+for+the+activation+of+the+inflammasome+for+processing+and+release+of+IL-1bin+monocytes+and+macrophages.">Differential requirement for the activation of the inflammasome for processing and release of IL-1bin monocytes and macrophages.</a> Blood. 113, 2324-2335 (2009).</li><li>Latz, E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+inflammasomes:+mechanisms+of+activation+and+function.">The inflammasomes: mechanisms of activation and function.</a> Curr Opin Immnol. 22, 28-33 (2010).</li><li>Masters, S. L., Simon, A., Aksentijevich, I., Kastner, D. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Horror+autoinflammaticus:+the+molecular+pathophysiology+of+autoinflammtory+disease.">Horror autoinflammaticus: the molecular pathophysiology of autoinflammtory disease.</a> Annu Rev Immunol. 27, 621-668 (2009).</li></ol>

利害の衝突は宣言されません。

説明した全血アッセイは、細胞の単離と豊富なサンプルの処理や操作を必要とする他の手法と比較してより密接に生理学的条件を模倣する簡単な方法です。このメソッドは、全血での白血球細胞をカウントするためにAOでCellometerビジョンを利用し、したがって、正確に細胞数に基づいてサンプルを標準化する方法を提供します。 それは他の抗凝固剤が知られているカル?...

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		<div>
		<table border="1">
		<thead>
		<tr>
		<th>Material Name</th>
		<th>Type</th>
		<th>Company</th>
		<th>Catalogue Number</th>
		<th>Comment</th>
		</tr>
		</thead>
		<tbody>
		
<tr>
<td>Sodium Heparin Blood Collection Tubes</td>
<td>&nbsp;</td>
<td>BD</td>
<td>366480</td>
<td>&nbsp;</td>
<tr>
<td>RPMI 1640 Media</td>
<td>&nbsp;</td>
<td>GIBCO</td>
<td>21870-100</td>
<td>&nbsp;</td>
<tr>
<td>Acridine Orange</td>
<td>&nbsp;</td>
<td>Invitrogen</td>
<td>A3568</td>
<td>&nbsp;</td>
<tr>
<td>Cellometer Vision</td>
<td>&nbsp;</td>
<td>Nexcelom Bioscience</td>
<td>&nbsp;</td>
<td>Contact company for instrument information</td>
</tr>
<tr>
<td>Cellometer Cell Counting Chambers</td>
<td>&nbsp;</td>
<td>Nexcelom Bioscience</td>
<td>CHT4-SD100</td>
<td>&nbsp;</td>
<tr>
<td>24-well Tissue Culture Plate</td>
<td>&nbsp;</td>
<td>Corning Costar</td>
<td>3524</td>
<td>&nbsp;</td>
<tr>
<td>Ultra Pure E. coli K12 LPS</td>
<td>&nbsp;</td>
<td>InvivoGen</td>
<td>tlrl-eklps</td>
<td>&nbsp;</td>
<tr>
<td>Adenosine 5&#180;-tripohasphate disodium salt hydrate</td>
<td>&nbsp;</td>
<td>Sigma-Aldrich</td>
<td>A26209</td>
<td>&nbsp;</td>
<tr>
<td>Bio-plex 200 system</td>
<td>&nbsp;</td>
<td>Bio-Rad</td>
<td>&nbsp;</td>
<td>Contact company for instrument information</td>
</tr>
<tr>
<td>Bio-Plex Pro human cytokine x-plex assay</td>
<td>&nbsp;</td>
<td>Bio-Rad</td>
<td>&nbsp;</td>
<td>x-plex assays are custom made according to specified cytokines of interest</td>
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accurate and simple measurement of the pro-inflammatory cytokine il-1&beta; using a whole blood stimulation assay

免疫細胞による可溶性メディエーターの分泌に起因する炎症プロセスは、皮膚、関節や他の組織と同様に変更されたサイトカインの恒常性の様々な症状につながる。自然免疫系は病原体や他の内因性危険性の刺激を認識する上で重要な役割を果たしている。自然免疫細胞から放出される主要なサイトカインの一つは、インターロイキン（IL）-1です。したがって、我々は、炎症性サイトカインの分泌を測定するために、特に炎症性サイトカインIL -1β1、2、3の全血の刺激アッセイを利用しています。 自己炎症症候群を引き起こす先天性免疫系の遺伝学的機能障害を有する患者は、単独でLPSで刺激した時に成熟IL -1βの誇張されたリリースを示します。炎症に関連した病態を呈する患者の自然免疫成分を評価するために、我々はそのようなグラム陰性細菌のエンドトキシン、リポ多糖（LPSなどの病原体関連分子パターン（PAMPs）、に細胞性免疫応答を検出する特異的免疫測定法を使用してください）。これらのPAMPsは、自然免疫系4、5、6、7の細胞で検出される病原体認識受容体（PRRS）、によって認識されます。二次信号、ATP、ソームの活性化、その成熟、生理活性型4、5、6、8、9にプロIL -1β処理することが多タンパク質複合体のために必要であると組み合わせて主信号、LPS、、 10。 全血アッセイは、特定の細胞集団の労働集約的な分離と培養を必要とする他の方法と比較すると、サイトカイン産生を評価するための最小限のサンプルの操作が必要です。このメソッドは、他の全血を刺激アッセイとは異なり、むしろRPMI培地の比率でサンプルを希釈するよりも、我々は、白血球の希釈全血から直接カウントし、そのため、文化2の白血球の数がわかっているを刺激行います。この特定の全血アッセイの結果は、自己炎症病態を呈する患者コホートの解明に有用な新規技術を実証する。

Watch this Scientific Journal Video about Accurate and Simple Measurement of the Pro-inflammatory Cytokine IL-1Î² using a Whole Blood Stimulation Assay at JoVE.com

Accurate and Simple Measurement of the Pro-inflammatory Cytokine IL-1&amp;#946; using a Whole Blood Stimulation Assay

我々は、自己炎症表現型を呈する患者では、このようなIL - 1βの産生などの炎症性サイトカインの産生を測定するための単純なイムノアッセイについて説明します。病原体関連分子パターンと全血培養では細胞を活性化することによって、特にリポ多糖で、サイトカインの分泌は、便利な全血上清で評価することができます。

全血刺激のためのアッセイを用いて炎症性サイトカインIL -1βの正確かつ簡単に測定

Inflammatory processes resulting from the secretion of soluble mediators by immune cells, lead to various manifestations in skin, joints and other tissues ...

accurate-simple-measurement-pro-inflammatory-cytokine-il-1-using

Research

JoVE Journal

Medicine

Accurate and Simple Measurement of the Pro-inflammatory Cytokine IL-1&beta; using a Whole Blood Stimulation Assay

26.2K ビュー.  National Institute of Arthritis and Musculoskeletal and Skin Diseases. 我々は、自己炎症表現型を呈する患者では、このようなIL - 1βの産生などの炎症性サイトカインの産生を測定するための単純なイムノアッセイについて説明します。病原体関連分子パターンと全血培養では細胞を活性化することによって、特にリポ多糖で、サイトカインの分泌は、便利な全血上清で評価することができます。

ビデオ: Accurate and Simple Measurement of the Pro-inflammatory Cytokine IL-1&#946; using a Whole Blood Stimulation Assay

Accurate and Simple Evaluation of Vascular Anastomoses in Monochorionic Placenta using Colored Dye

The presence of placental vascular anastomoses is a conditio sine qua non for the development of twin-to-twin transfusion syndrome (TTTS) and twin anemia polycythemia sequence (TAPS)1,2. Injection studies of twin placentas have shown that such anastomoses are almost invariably present in monochorionic twins and extremely rare in dichorionic twins1. Three types of anastomoses have been documented: from artery to artery, from vein to vein and from artery to vein. Arterio-venous (AV) anastomoses are unidirectional and are referred to as "deep" anastomoses since they proceed through a shared placental cotyledon, whereas arterio-arterial (AA) and veno-venous (VV) anastomoses are bi-directional and are referred to as "superficial" since they lie on the chorionic plate. Both TTTS and TAPS are caused by net imbalance of blood flow between the twins due to AV anastomoses. Blood from one twin (the donor) is pumped through an artery into the shared placental cotyledon and then drained through a vein into the circulation of the other twin (the recipient). Unless blood is pumped back from the recipient to the donor through oppositely directed deep AV anastomoses or through superficial anastomoses, an imbalance of blood volumes occurs, gradually leading to the development of TTTS or TAPS. The presence of an AA anastomosis has been shown to protect against the development of TTTS and TAPS by compensating for the circulatory imbalance caused by the uni-directional AV anastomoses1,2. 
Injection of monochorionic placentas soon after birth is a useful mean to understand the etiology of various (hematological) complications in monochorionic twins and is a required test to reach the diagnosis of TAPS2. In addition, injection of TTTS placentas treated with fetoscopic laser surgery allows identification of possible residual anastomoses3-5. This additional information is of paramount importance for all perinatologists involved in the management and care of monochorionic twins with TTTS or TAPS. Several placental injection techniques are currently being used. We provide a simple protocol to accurately evaluate the presence of (residual) vascular anastomoses using colored dye injection.

Twin-to-twin transfusion syndrome and twin anemia polycythemia sequence are two potentially devastating problems in perinatal medicine. Both disorders occur only in monochorionic twins and result from unbalanced blood flow through placental vascular anastomoses. We provide a simple protocol to accurately evaluate the presence of vascular anastomoses using colored dye injection of placental vessels after birth.

カラー染料を使用して単一絨毛膜性の胎盤における血管吻合の正確かつ簡単に評価

The presence of placental vascular anastomoses is a conditio sine qua non for the development of twin-to-twin transfusion syndrome (TTTS) and twin anemia ...

医学

Epidural Intracranial Pressure Measurement in Rats Using a Fiber-optic Pressure Transducer

Elevated intracranial pressure (ICP) is a significant problem in several forms of ischemic brain injury including stroke, traumatic brain injury and cardiac arrest. This elevation may result in further neurological injury, in the form of transtentorial herniation1,2,3,4, midbrain compression, neurological deficit or increased cerebral infarct2,4. Current therapies are often inadequate to control elevated ICP in the clinical setting5,6,7 . Thus there is a need for accurate methods of ICP measurement in animal models to further our understanding of the basic mechanisms and to develop new treatments for elevated ICP.
In both the clinical and experimental setting ICP cannot be estimated without direct measurement. Several methods of ICP catheter insertion currently exist. Of these the intraventricular catheter has become the clinical 'gold standard' of ICP measurement in humans8. This method involves the partial removal of skull and the instrumentation of the catheter through brain tissue. Consequently, intraventricular catheters have an infection rate of 6-11%9. For this reason, subdural and epidural cannulations have become the preferred methods in animal models of ischemic injury. 
Various ICP measurement techniques have been adapted for animal models, and of these, fluid-filled telemetry catheters10 and solid state catheters are the most frequently used11,12,13,14,15. The fluid-filled systems are prone to developing air bubbles in the line, resulting in false ICP readings. Solid state probes avoid this problem (Figure 1). An additional problem is fitting catheters under the skull or into the ventricles without causing any brain injury that might alter the experimental outcomes. Therefore, we have developed a method that places an ICP catheter contiguous with the epidural space, but avoids the need to insert it between skull and brain. 
An optic fibre pressure catheter (420LP, SAMBA Sensors, Sweden) was used to measure ICP at the epidural location because the location of the pressure sensor (at the very tip of the catheter) was found to produce a high fidelity ICP signal in this model. There are other manufacturers of similar optic fibre technologies13 that may be used with our methodology. Alternative solid state catheters, which have the pressure sensor located at the side of the catheter tip, would not be appropriate for this model as the signal would be dampened by the presence of the monitoring screw. 
Here, we present a relatively simple and accurate method to measure ICP. This method can be used across a wide range of ICP related animal models.

A novel technique to record the pressures within the skull is described. The minimally invasive method uses a fibre-optic pressure sensing system to accurately measure intracranial pressure (ICP) in anaesthetized rats without causing significant brain trauma. The technique may be used in a wide range of experimental models.

光ファイバ圧力トランスデューサを使用したラットの硬膜外頭蓋内圧測定

Elevated intracranial pressure (ICP) is a significant problem in several forms of ischemic brain injury including stroke, traumatic brain injury and ...

Rapid Point-of-Care Assay of Enoxaparin Anticoagulant Efficacy in Whole Blood

There is the need for a clinical assay to determine the extent to which a patient's blood is effectively anticoagulated by the low-molecular-weight-heparin (LMWH), enoxaparin. There are also urgent clinical situations where it would be important if this could be determined rapidly. The present assay is designed to accomplish this. We only assayed human blood samples that were spiked with known concentrations of enoxaparin. The essential feature of the present assay is the quantification of the efficacy of enoxaparin in a patient's blood sample by degrading it to complete inactivity with heparinase. Two blood samples were drawn into Vacutainer tubes (Becton-Dickenson; Franklin Lakes, NJ) that were spiked with enoxaparin; one sample was digested with heparinase for 5 min at 37 &deg;C, the other sample represented the patient's baseline anticoagulated status. The percent shortening of clotting time in the heparinase-treated sample, as compared to the baseline state, yielded the anticoagulant contribution of enoxaparin. We used the portable, battery operated Hemochron 801 apparatus for measurements of clotting times (International Technidyne Corp., Edison, NJ). The apparatus has 2 thermostatically controlled (37 &deg;C) assay tube wells. We conducted the assays in two types of assay cartridges that are available from the manufacturer of the instrument. One cartridge was modified to increase its sensitivity. We removed the kaolin from the FTK-ACT cartridge by extensive rinsing with distilled water, leaving only the glass surface of the tube, and perhaps the detection magnet, as activators. We called this our minimally activated assay (MAA). The use of a minimally activated assay has been studied by us and others. 2-4 The second cartridge that was studied was an activated partial thromboplastin time (aPTT) assay (A104). This was used as supplied from the manufacturer. The thermostated wells of the instrument were used for both the heparinase digestion and coagulation assays. The assay can be completed within 10 min. The MAA assay showed robust changes in clotting time after heparinase digestion of enoxaparin over a typical clinical concentration range. At 0.2 anti-Xa I.U. of enoxaparin per ml of blood sample, heparinase digestion caused an average decrease of 9.8% (20.4 sec) in clotting time; at 1.0 I.U. per ml of enoxaparin there was a 41.4% decrease (148.8 sec). This report only presents the experimental application of the assay; its value in a clinical setting must still be established.

Demonstration of a rapid quantitative assay of the inhibition of blood coagulation by the low-molecular-weight-heparin, enoxaparin. The contribution of enoxaparin is assessed by removing its influence through digestion with heparinase. A fuller description of the assay is detailed in our published paper.1 The assay still requires clinical confirmation.

全血におけるエノキサパリン抗凝固効果の迅速なポイントオブケアアッセイ

There is the need for a clinical assay to determine the extent to which a patient's blood is effectively anticoagulated by the ...

Excitotoxic Stimulation of Brain Microslices as an In vitro Model of Stroke

Examining molecular mechanisms involved in neuropathological conditions, such as ischemic stroke, can be difficult when using whole animal systems. As such, primary or &#39;neuronal-like&#39; cell culture systems are commonly utilized. While&#160;these systems are relatively easy to work with, and are useful model systems in which various functional outcomes (such as cell death) can be readily quantified, the examined outcomes and pathways in cultured immature neurons (such as excitotoxicity-mediated cell death pathways) are not necessarily the same as those observed in mature brain, or in intact tissue. Therefore, there is the need to develop models in which cellular mechanisms in mature neural tissue can be examined. We have developed an in vitro technique that can be used to investigate a variety of molecular pathways in intact nervous tissue. The technique described herein utilizes rat cortical tissue, but this technique can be adapted to use tissue from a variety of species (such as mouse, rabbit, guinea pig, and chicken) or brain regions (for example, hippocampus, striatum, etc.). Additionally, a variety of stimulations/treatments can be used (for example, excitotoxic, administration of inhibitors, etc.). In conclusion, the brain slice model described herein can be used to examine a variety of molecular mechanisms involved in excitotoxicity-mediated brain injury.

Excitotoxic Stimulation of Brain Microslices as an In vitro Model of Stroke

We have developed a brain slice model which can be used to examine molecular mechanisms involved in excitotoxicity-mediated brain injury.&#160;This technique generates viable mature brain tissue and reduces animal numbers required for experimentation, whilst keeping the neuronal circuitry, cellular interactions, and postsynaptic compartments partly intact.

脳Microslicesの興奮毒性刺激<em&gt;インビトロ</em&gt;脳卒中のモデル

Examining molecular mechanisms involved in neuropathological conditions, such as ischemic stroke, can be difficult when using whole animal systems. As ...

Fast and Accurate Exhaled Breath Ammonia Measurement

This exhaled breath ammonia method uses a fast and highly sensitive spectroscopic method known as quartz enhanced photoacoustic spectroscopy (QEPAS) that uses a quantum cascade based laser. The monitor is coupled to a sampler that measures mouth pressure and carbon dioxide. The system is temperature controlled and specifically designed to address the reactivity of this compound. The sampler provides immediate feedback to the subject and the technician on the quality of the breath effort. Together with the quick response time of the monitor, this system is capable of accurately measuring exhaled breath ammonia representative of deep lung systemic levels. 
Because the system is easy to use and produces real time results, it has enabled experiments to identify factors that influence measurements. For example, mouth rinse and oral pH reproducibly and significantly affect results and therefore must be controlled. Temperature and mode of breathing are other examples. As our understanding of these factors evolves, error is reduced, and clinical studies become more meaningful. This system is very reliable and individual measurements are inexpensive. 
The sampler is relatively inexpensive and quite portable, but the monitor is neither. This limits options for some clinical studies and provides rational for future innovations.

Ammonia is an important physiologic metabolite relevant to various disease and wellness states. It is also a difficult molecule to measure in breath, which demands particular precautions be taken to obtain accurate results. Not all factors influencing ammonia are known, but progress can be difficult without accounting for these factors.

高速かつ正確な呼気アンモニア測定

This exhaled breath ammonia method uses a fast and highly sensitive spectroscopic method known as quartz enhanced photoacoustic spectroscopy (QEPAS) that ...

Real-time Cytotoxicity Assays in Human Whole Blood

A live cell-based whole blood cytotoxicity assay (WCA) that allows access to temporal information of the overall cell cytotoxicity is developed with high-throughput cell positioning technology. The targeted tumor cell populations are first preprogrammed to immobilization into an array format, and labeled with green fluorescent cytosolic dyes. Following the cell array formation, antibody drugs are added in combination with human whole blood. Propidium iodide (PI) is then added to assess cell death. The cell array is analyzed with an automatic imaging system. While cytosolic dye labels the targeted tumor cell populations, PI labels the dead tumor cell populations. Thus, the percentage of target cancer cell killing can be quantified by calculating the number of surviving targeted cells to the number of dead targeted cells. With this method, researchers are able to access time-dependent and dose-dependent cell cytotoxicity information. Remarkably, no hazardous radiochemicals are used. The WCA presented here has been tested with lymphoma, leukemia, and solid tumor cell lines. Therefore, WCA allows researchers to assess drug efficacy in a highly relevant ex&#160;vivo condition.

The whole blood cytotoxicity assay (WCA) is a cytotoxicity assay developed by incorporating high-throughput cell positioning technology with fluorescence microscopy and automated image processing. Here, we describe how lymphoma cells treated with an anti-CD20 antibody can be analyzed real-time in human whole blood to provide quantitative cellular cytotoxicity analysis.

ヒト全血でのリアルタイム細胞毒性アッセイ

A live cell-based whole blood cytotoxicity assay (WCA) that allows access to temporal information of the overall cell cytotoxicity is developed with ...

A Simple Device to Rapidly Prepare Whole Mounts of the Mouse Intestine

Preparing whole mounts of the mouse small intestine and colon for subsequent analysis or quantification can be time consuming and difficult. We describe the use of a simple device to cut and &#8216;roll&#8217; mouse intestines to rapidly prepare whole mount preparations of superior and uniform quality to that which can be achieved by hand. The device comprises a base that holds 4 stainless steel rods and a top, which acts a cutting guide. The rods are inserted into the lumen of the small intestine [divided into thirds] and the colon. The rods and samples are then placed over a piece of filter paper or card into the holding slots in the base of the device. The top of the device is then positioned and serves as a cutting guide. The two angled sections in the center of the top piece are used to guide a knife or scalpel and cut the intestines longitudinally on the top of the rods. Once the intestinal sections have been cut, the top is removed and the card,&#160;tissue and rods gently removed from the device and placed on the bench. The rods are then gently rolled sideways to flatten and stick the intestinal segments onto the underlying piece of filter paper or card. The final preparation can then be examined or fixed and stored for later analysis. The preparations are invaluable for the study of intestinal changes in normal or genetically modified mouse models. The preparations have been used for the study and quantification of the effects of inflammation (colitis), damage, pre-cancerous lesions (aberrant crypt foci (ACFs) and mucin depleted foci (MDFs)) and polyps or tumors.

The use of a simple device to cut and &#8216;roll&#8217; mouse intestines to rapidly prepare whole mount preparations is described.

急速にマウス腸のホールマウントを準備するための簡単​​な装置

Preparing whole mounts of the mouse small intestine and colon for subsequent analysis or quantification can be time consuming and difficult. We describe ...

Using Saccadometry with Deep Brain Stimulation to Study Normal and Pathological Brain Function

The oculomotor system involves a large number of brain areas including parts of the basal ganglia, and various neurodegenerative diseases including Parkinson's and Huntington's can disrupt it. People with Parkinson's disease, for example, tend to have increased saccadic latencies. Consequently, the quantitative measurement of saccadic eye movements has received considerable attention as a potential biomarker for neurodegenerative conditions. A lot more can be learned about the brain in both health and disease by observing what happens to eye movements when the function of specific brain areas is perturbed. Deep brain stimulation is a surgical intervention used for the management of a range of neurological conditions including Parkinson's disease, in which stimulating electrodes are placed in specific brain areas including several sites in the basal ganglia. Eye movement measurements can then be made with the stimulator systems both off and on and the results compared. With suitable experimental design, this approach can be used to study the pathophysiology of the disease being treated, the mechanism by which DBS exerts it beneficial effects, and even aspects of normal neurophysiology.

This paper describes the use of quantitative measurement of eye movements in conjunction with stimulation of focal areas of the deep brain in order to study physiology, pathophysiology, and the mechanisms of deep brain stimulation.

正常および病的脳機能を研究するために脳深部刺激でSaccadometryを使用します

The oculomotor system involves a large number of brain areas including parts of the basal ganglia, and various neurodegenerative diseases including ...

Long-term Blood Pressure Measurement in Freely Moving Mice Using Telemetry

During the development of new vasoactive agents, arterial blood pressure monitoring is crucial for evaluating the efficacy of the new proposed drugs. Indeed, research focusing on the discovery of new potential therapeutic targets using genetically altered mice requires a reliable, long-term assessment of the systemic arterial pressure variation. Currently, the gold standard for obtaining long-term measurements of blood pressure in ambulatory mice uses implantable radio-transmitters, which require&#160;artery cannulation. This technique eliminates the need for tethering, restraining, or anesthetizing the animals which introduce stress and artifacts during data sampling. However, arterial blood pressure monitoring in mice via catheterization can be rather challenging due to the small size of the arteries. Here we present a step-by-step guide to illustrate the crucial key passages for a successful subcutaneous implantation of radio-transmitters and carotid artery cannulation in mice. We also include examples of long-term blood pressure activity taken from freely moving mice after a period of post-surgery recovery. Following this procedure will allow reliable direct blood pressure recordings from multiple animals simultaneously.

The goal of this protocol is to assess systemic blood pressure in conscious freely moving mice using implantable radio-telemetry devices.

テレメトリを使用して自由に動くマウスにおける長期血圧測定

During the development of new vasoactive agents, arterial blood pressure monitoring is crucial for evaluating the efficacy of the new proposed drugs. ...

Assessment of the Anticoagulant and Anti-inflammatory Properties of Endothelial Cells Using 3D Cell Culture and Non-anticoagulated Whole Blood

In vivo, endothelial cells are crucial for the natural anticoagulation of circulating blood. Consequently, endothelial cell activation leads to blood coagulation. This phenomenon is observed in many clinical situations, like organ transplantation in the presence of pre-formed anti-donor antibodies, including xenotransplantation, as well as in ischemia/reperfusion injury. In order to reduce animal experimentation according to the 3R standards (reduction, replacement and refinement), in vitro models to study the effect of endothelial cell activation on blood coagulation would be highly desirable. However, common flatbed systems of endothelial cell culture provide a surface-to-volume ratio of 1 - 5 cm2 of endothelium per mL of blood, which is not sufficient for natural, endothelial-mediated anticoagulation. Culturing endothelial cells on microcarrier beads may increase the surface-to-volume ratio to 40 - 160 cm2/mL. This increased ratio is sufficient to ensure the &#34;natural&#34; anticoagulation of whole blood, so that the use of anticoagulants can be avoided. Here an in vitro microcarrier-based system is described to study the effects of genetic modification of porcine endothelial cells on coagulation of whole, non-anticoagulated human blood. In the described assay, primary porcine aortic endothelial cells, either wild type (WT) or transgenic for human CD46 and thrombomodulin, were grown on microcarrier beads and then exposed to freshly drawn non-anticoagulated human blood. This model allows for the measurement and quantification of cytokine release as well as activation markers of complement and coagulation in the blood plasma. In addition, imaging of activated endothelial cell and deposition of immunoglobulins, complement- and coagulation proteins on the endothelialized beads were performed by confocal microscopy. This assay can also be used to test drugs which are supposed to prevent endothelial cell activation and, thus, coagulation. On top of its potential to reduce the number of animals used for such investigations, the described assay is easy to perform and consistently reproducible.

We present an in vitro model which allows the study and analysis of coagulation in whole, non-anticoagulated blood. Anticoagulation in the system depends on the natural anticoagulation effect of healthy endothelial cells and endothelial cell activation will result in clotting.

3 D 細胞培養と非高血圧症全血を用いた血管内皮細胞の抗凝固および抗炎症作用の評価

In vivo, endothelial cells are crucial for the natural anticoagulation of circulating blood. Consequently, endothelial cell activation leads to blood ...