Name: label-free neutrophil enrichment from patient-derived airway secretion using closed-loop inertial microfluidics
Uploaded: 2018-06-07T14:30:00
Description: Watch this Scientific Journal Video about Label-free Neutrophil Enrichment from Patient-derived Airway Secretion Using Closed-loop Inertial Microfluidics at JoVE.com

この作品は、NIH U24 サンプル温存法プログラム (U24 AI118656) だけでなく、NIH/NIAID (R21AI119042) によって支えられました。

サンプル コレクションは、ピッツバーグ大学制度審査委員会 (IRB # PRO16060443, PRO10110387) によって承認されました。すべての実験は、バイオ セーフティ キャビネット適切な個人用保護具付けの下で実行されます。
1. デバイス作製とソフト ・ リソグラフィー
注: 標準的なソフト ・ リソグラフィー技術15,16はポ...

<ol>
	<li>Hamid, Q., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Methods+of+sputum+processing+for+cell+counts,+immunocytochemistry+and+in+situ+hybridisation.">Methods of sputum processing for cell counts, immunocytochemistry and in situ hybridisation.</a> European Respiratory Journal. 20 (Supplement 37), 19S-23S (2002).</li><li>van Overveld, F. J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Effects+of+homogenization+of+induced+sputum+by+dithiothreitol+on+polymorphonuclear+cells.">Effects of homogenization of induced sputum by dithiothreitol on polymorphonuclear cells.</a> J Physiol Pharmacol. 56, 143-154 (2005).</li><li>Qiu, D., Tan, W. C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Dithiothreitol+has+a+dose-response+effect+on+cell+surface+antigen+expression.">Dithiothreitol has a dose-response effect on cell surface antigen expression.</a> J Allergy Clin Immunol. 103 (5 Pt 1), 873-876 (1999).</li><li>Usher, L. R., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Induction+of+Neutrophil+Apoptosis+by+the+Pseudomonas+aeruginosa+Exotoxin+Pyocyanin:+A+Potential+Mechanism+of+Persistent+Infection.">Induction of Neutrophil Apoptosis by the Pseudomonas aeruginosa Exotoxin Pyocyanin: A Potential Mechanism of Persistent Infection.</a> The Journal of Immunology. 168 (4), 1861-1868 (2002).</li><li>Di Carlo, D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Inertial+microfluidics.">Inertial microfluidics.</a> Lab Chip. 9 (21), 3038-3046 (2009).</li><li>Martel, J. M., Toner, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Inertial+focusing+dynamics+in+spiral+microchannels.">Inertial focusing dynamics in spiral microchannels.</a> Phys Fluids. 24 (3), 32001 (2012).</li><li>Zhang, J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Fundamentals+and+applications+of+inertial+microfluidics:+a+review.">Fundamentals and applications of inertial microfluidics: a review.</a> Lab Chip. 16 (1), 10-34 (2016).</li><li>Hou, H. W., Bhattacharyya, R. P., Hung, D. T., Han, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Direct+detection+and+drug-resistance+profiling+of+bacteremias+using+inertial+microfluidics.">Direct detection and drug-resistance profiling of bacteremias using inertial microfluidics.</a> Lab Chip. 15 (10), 2297-2307 (2015).</li><li>Warkiani, M. E., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Ultra-fast,+label-free+isolation+of+circulating+tumor+cells+from+blood+using+spiral+microfluidics.">Ultra-fast, label-free isolation of circulating tumor cells from blood using spiral microfluidics.</a> Nat Protoc. 11 (1), 134-148 (2016).</li><li>Warkiani, M. E., Tay, A. K., Guan, G., Han, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Membrane-less+microfiltration+using+inertial+microfluidics.">Membrane-less microfiltration using inertial microfluidics.</a> Sci Rep. 5, 11018 (2015).</li><li>Warkiani, M. E., Wu, L., Tay, A. K., Han, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Large-Volume+Microfluidic+Cell+Sorting+for+Biomedical+Applications.">Large-Volume Microfluidic Cell Sorting for Biomedical Applications.</a> Annu Rev Biomed Eng. 17, 1-34 (2015).</li><li>Kwon, T., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Microfluidic+Cell+Retention+Device+for+Perfusion+of+Mammalian+Suspension+Culture.">Microfluidic Cell Retention Device for Perfusion of Mammalian Suspension Culture.</a> Sci Rep. 7 (1), 6703 (2017).</li><li>Wu, L., Guan, G., Hou, H. W., Bhagat, A. A., Han, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Separation+of+leukocytes+from+blood+using+spiral+channel+with+trapezoid+cross-section.">Separation of leukocytes from blood using spiral channel with trapezoid cross-section.</a> Anal Chem. 84 (21), 9324-9331 (2012).</li><li>Guan, G., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Spiral+microchannel+with+rectangular+and+trapezoidal+cross-sections+for+size+based+particle+separation.">Spiral microchannel with rectangular and trapezoidal cross-sections for size based particle separation.</a> Sci Rep. 3, 1475 (2013).</li><li>Kotz, K., Cheng, X., Toner, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=PDMS+Device+Fabrication+and+Surface+Modification.">PDMS Device Fabrication and Surface Modification.</a> J Vis Exp. (8), e319 (2007).</li><li>Duffy, D. C., McDonald, J. C., Schueller, O. J. A., Whitesides, G. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Rapid+Prototyping+of+Microfluidic+Systems+in+Poly(dimethylsiloxane).">Rapid Prototyping of Microfluidic Systems in Poly(dimethylsiloxane).</a> Analytical Chemistry. 70 (23), 4974-4984 (1998).</li><li>Ryu, H., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Patient-Derived+Airway+Secretion+Dissociation+Technique+To+Isolate+and+Concentrate+Immune+Cells+Using+Closed-Loop+Inertial+Microfluidics.">Patient-Derived Airway Secretion Dissociation Technique To Isolate and Concentrate Immune Cells Using Closed-Loop Inertial Microfluidics.</a> Anal Chem. 89 (10), 5549-5556 (2017).</li><li>Mach, A. J., Di Carlo, D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Continuous+scalable+blood+filtration+device+using+inertial+microfluidics.">Continuous scalable blood filtration device using inertial microfluidics.</a> Biotechnol Bioeng. 107 (2), 302-311 (2010).</li><li>Di Carlo, D., Irimia, D., Tompkins, R. G., Toner, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Continuous+inertial+focusing,+ordering,+and+separation+of+particles+in+microchannels.">Continuous inertial focusing, ordering, and separation of particles in microchannels.</a> Proc Natl Acad Sci U S A. 104 (48), 18892-18897 (2007).</li><li>Xiang, N., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Fundamentals+of+elasto-inertial+particle+focusing+in+curved+microfluidic+channels.">Fundamentals of elasto-inertial particle focusing in curved microfluidic channels.</a> Lab Chip. 16 (14), 2626-2635 (2016).</li><li>Lotvall, J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Asthma+endotypes:+a+new+approach+to+classification+of+disease+entities+within+the+asthma+syndrome.">Asthma endotypes: a new approach to classification of disease entities within the asthma syndrome.</a> J Allergy Clin Immunol. 127 (2), 355-360 (2011).</li><li>Houston, N., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Sputum+neutrophils+in+cystic+fibrosis+patients+display+a+reduced+respiratory+burst.">Sputum neutrophils in cystic fibrosis patients display a reduced respiratory burst.</a> J Cyst Fibros. 12 (4), 352-362 (2013).</li><li>Janoff, A., Scherer, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Mediators+of+inflammation+in+leukocyte+lysosomes.+IX.+Elastinolytic+activity+in+granules+of+human+polymorphonuclear+leukocytes.">Mediators of inflammation in leukocyte lysosomes. IX. Elastinolytic activity in granules of human polymorphonuclear leukocytes.</a> J Exp Med. 128 (5), 1137-1155 (1968).</li><li>Kawabata, K., Hagio, T., Matsuoka, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+role+of+neutrophil+elastase+in+acute+lung+injury.">The role of neutrophil elastase in acute lung injury.</a> Eur J Pharmacol. 451 (1), 1-10 (2002).</li><li>Rubin, B. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Plastic+Bronchitis.">Plastic Bronchitis.</a> Clin Chest Med. 37 (3), 405-408 (2016).</li><li>Kokot, K., Teschner, M., Schaefer, R. M., Heidland, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Stimulation+and+inhibition+of+elastase+release+from+human+neutrophils+dependent+on+the+calcium+messenger+system.">Stimulation and inhibition of elastase release from human neutrophils dependent on the calcium messenger system.</a> Miner Electrolyte Metab. 13 (2), 133-140 (1987).</li></ol>

慣性マイクロ粒子と細胞は、マイクロ流路のサイズ5,18,19,20に基づいて特定の水平位置にローカライズします。ディーンの複合効果による力と慣性の揚力曲線マイクロ、大きな粒子、好中球をドラッグ (> 10 μ m) 6 より小さいチャネルと小さな粒子、粘液の集計、および残骸の中にある μ m を配置以...

細胞は多量の気道分泌物で粘液にカプセル化されて、以来の in vitroアッセイによる白血球の機能評価を妨げられています。ジチオトレイトール (DTT) は最も一般的な換散バッファーを切り離して、細胞学的分析と単離細胞1,2の許容性を提供しながら調停の検出の喀痰を均質化します。ただし、DTT はエラスターゼおよびミエロペルオキシダーゼ (MPO) リリース2,3など好中球機能の中断の結果気道好中球表面結合抗原を妨げることができます。したがって、末梢血好中球肺4の生理学的特性を明らかにするかもしれないとひと気道好中球機能のいくつかの研究が行われています。一方、慣性マイクロは、様々 な患者のマトリックス5,6から細胞を分離することを進歩させてをきました。慣性の揚力とディーン ドラッグ間の平衡により、ラベル無料粒子分離7彼らの大きさに応じて粒子/セルに配置します。当社グループは以前循環腫瘍細胞8,9血8病原体、細胞懸濁液文化10、11,からの試料作製法を導入した12と多形核白血球 (PMNs) 血13,14から。
好中球エラスターゼ (NE) アッセイなど、下流の in vitroアッセイの閉ループ慣性マイクロを使用して患者さんの気道分泌物から免疫細胞を準備するためのプロトコルを紹介します。このメソッドは、セル/粒子の元、セル/粒子の金利が削除される臨床サンプルでよく観察される横方向に重要な重複がある場合は特に、高濃度と復旧の両方を提供します。内部壁 (IW) を再循環によって-廃棄物の貯留層を通過する小さな粘液骨材を用いた背景流体中大きな粒子またはセルへ入力サンプル チューブ、粒子や貯水池の元セルの関心集中を集中。臨床サンプルの異種流体特性、にもかかわらず提案手法を一貫して好中球 1,000 倍希釈、気道分泌物のサンプルからの 95% 以上回復 (〜 1 mL) きれいな食塩水で。対照的に、換散方法は Pmn の広い範囲のサンプル条件によって回収率を示します。提案プロトコルは、物理的あるいは化学的停止することなく、臨床的に低侵襲と生体に挑戦から繊細な細胞を収穫する可能性を提供するが無料のラベルに白血球をキャプチャします。

<table>
	<tbody>
		<tr>
			<td>PDMS precursor</td>
			<td>Dow corning</td>
			<td>184 SIL ELAST KIT 3.9KG</td>
			<td>10:1 ratio of base and curing agent</td>
		</tr>
		<tr>
			<td>VWR gravity convection oven</td>
			<td>VWR</td>
			<td>414005-128</td>
			<td>PDMS precursor to be cured in 90 deg.</td>
		</tr>
		<tr>
			<td>100mm petri dish</td>
			<td>VWR</td>
			<td>89000-324</td>
			<td>Fabrication of PDMS Supporting layer</td>
		</tr>
		<tr>
			<td>Harris Uni-core puncher</td>
			<td>Sigma-aldrich</td>
			<td>WHAWB100076</td>
			<td>2mm diameter or other depending on the tubing size</td>
		</tr>
		<tr>
			<td>Air plasma machine</td>
			<td>Femto Science</td>
			<td>Cute</td>
			<td>Surface plasma treatment for PDMS device to bottom base.</td>
		</tr>
		<tr>
			<td>2&#8221; x 3&#8221; glass slide</td>
			<td>TED PELLA, INC.</td>
			<td>2195</td>
			<td>To support PDMS device</td>
		</tr>
		<tr>
			<td>Masterflex spooled platinum-cured silicone tubing, L/S 14</td>
			<td>Cole-Parmer</td>
			<td>EW-96410-14</td>
			<td>Tubing for microfluidics and peristlatic pump</td>
		</tr>
		<tr>
			<td>1/16 inch Luer connector, male</td>
			<td>Harvard apparatus</td>
			<td>PC2 72-1443</td>
			<td>Connector for fluid guide</td>
		</tr>
		<tr>
			<td>50mL Falcon tube</td>
			<td>Corning</td>
			<td>21008-940</td>
			<td>sample collection &#38; preparation</td>
		</tr>
		<tr>
			<td>Phosphate-Buffered Saline, 1X Without Calcium and Magnesium</td>
			<td>Corning</td>
			<td>45000-446&#160;</td>
			<td>Buffer solution to dilute sample</td>
		</tr>
		<tr>
			<td>Halyard Closed suction Catheter, Elbow, 14F/ channel 4.67mm</td>
			<td>HALYARD HEALTH</td>
			<td>22113</td>
			<td>Tracheal seceation suction catheter</td>
		</tr>
		<tr>
			<td>0.9% Sterile Normal saline, 10mL pre-filled syringe</td>
			<td>BD PosiFlush</td>
			<td>NHRIC: 8290-306547</td>
			<td>For tracheal seceation collection from the patients</td>
		</tr>
		<tr>
			<td>SecurTainer&#8482; III Specimen Containers, 20mL</td>
			<td>Simport</td>
			<td>1176R36</td>
			<td>Sterile sputum (airway secretion) collection container</td>
		</tr>
		<tr>
			<td>Syringe with Luer-Lok Tip, 10mL</td>
			<td>BD</td>
			<td>BD309604</td>
			<td>To pipette homogenize the mucus sample and reach the bottom of sample tube</td>
		</tr>
		<tr>
			<td>BD&#160; Blunt Fill Needle, with BD Luer-Lok&#160; Tip</td>
			<td>BD</td>
			<td></td>
			<td>To pipette homogenize the mucus sample and reach the bottom of sample tube</td>
		</tr>
		<tr>
			<td>40&#181;m nylon cell strainer&#160;</td>
			<td>Falcon</td>
			<td>21008-949</td>
			<td>To remove large chunk or blood clots, which can block the microfluidics access hole or the channel.</td>
		</tr>
		<tr>
			<td>Peristaltic pump (Masterflex L/S Digital Drive)</td>
			<td>Cole-Parmer</td>
			<td>HV-07522-30</td>
			<td>operation of microfluidics</td>
		</tr>
		<tr>
			<td>BD LSR II flow cytometer</td>
			<td>BD Bioscience</td>
			<td>LSR II flow cytometer</td>
			<td>Quantification of cell recovery ratio</td>
		</tr>
		<tr>
			<td>Fluorescein isothiocyanate (FITC)-conjugated mouse anti-human CD66b monoclonal antibody</td>
			<td>BD Bioscience</td>
			<td>561927</td>
			<td>Immunostaining of neutrophils for Flow cytometer analysis</td>
		</tr>
		<tr>
			<td>Allophycocyanin (APC)-conjugated mouse anti-human CD45 monoclonal antibody</td>
			<td>BD Bioscience</td>
			<td>561864</td>
			<td>Immunostaining of neutrophils for Flow cytometer analysis</td>
		</tr>
		<tr>
			<td>Plate reader</td>
			<td>Thermo Fisher scientific</td>
			<td>Varioskan</td>
			<td>Plate reader for neutrophil elastase assay, ex485/em525</td>
		</tr>
		<tr>
			<td>Neutrophil elastase assay kit</td>
			<td>Cayman Chemical</td>
			<td>600610</td>
			<td>Neutrophil functionality assessment</td>
		</tr>
		<tr>
			<td>Fluoresbrite YG Microspheres 10.0&#181;m</td>
			<td>PolyScience, Inc.</td>
			<td>18140-2</td>
			<td>Fluorescent particles to express white blood cell trajectory in microfluidics</td>
		</tr>
	</tbody>
</table>

label-free neutrophil enrichment from patient-derived airway secretion using closed-loop inertial microfluidics

気道分泌物には、多数免疫関連細胞、例えば、好中球、マクロファージ、リンパ球は、さまざまな肺疾患、研究および臨床目的のための両方を評価する主要なリソースとして使用することができますにはが含まれています。しかし、患者の粘液の異種と粘性の性質のためありません現在メソッドがあります信頼性の高い解離患者気道分泌の宿主の免疫細胞に被害はありません。本研究では慣性マイクロ流体を使用して、患者さんの免疫の評価のためのサンプル調製法を紹介します。臨床サンプルの異種流体プロパティに関係なく、提案手法は 1,000 倍希釈、気道分泌物のサンプルから好中球の 95% 以上を回復する清潔な生理食塩水のミリリットルと。初期サンプル貯水池へ集中している出力ストリームを再循環によって高濃度、回復、および免疫細胞の純度は用意されています。再循環は、トレードオフが伴う慣性マイクロ流体の単一実行注射器ベースの操作と見なされます。スパイラル マイクロ流体システムの閉ループ操作ホルボール 12-ミリスタート 13-アセタート (PMA) によって示されるように物理的または化学的にせずに、白血球を提供します-並べ替えられた好中球のエラスターゼ遊離。

孟とマイクロ流体解離 (図 3 a) を DTT と両方で透明な免疫細胞懸濁液を達成しました。マイクロ解離収集 105 Pmn x 4.40 平均 (2.1 x 10 x 10 の5 Pmn 5.60 に4 n = 6) 気道分泌のサンプルから 1,000 倍希釈 (容量 50 mL) きれいな懸濁液の 1 mL に。初期希釈 94.0 %pmn と比較して (CD66b+/CD45+) 6 臨床サンプルにわたって一貫して、...

Watch this Scientific Journal Video about Label-free Neutrophil Enrichment from Patient-derived Airway Secretion Using Closed-loop Inertial Microfluidics at JoVE.com

Label-free Neutrophil Enrichment from Patient-derived Airway Secretion Using Closed-loop Inertial Microfluidics

本研究ではスパイラル慣性マイクロ流体システムの閉ループの操作を使用して臨床の気道分泌物からラベル無料好中球分離法を紹介します。提案手法は、様々 な呼吸器疾患の臨床の in vitroアッセイを拡大します。

閉ループ慣性マイクロ流路を用いた患者由来気道分泌からラベル無料好中球の濃縮

Airway secretions contain a large number of immune-related cells, e.g., neutrophils, macrophages, and lymphocytes, which can be used as a major resource ...

Research

JoVE Journal

Immunology and Infection

Long Term Chronic Pseudomonas aeruginosa Airway Infection in Mice

Long Term Chronic Pseudomonas aeruginosa Airway Infection in Mice

長期的な慢性<em&gt;緑膿菌</emマウスにおける&gt;気道感染

A mouse model of chronic airway infection is a key asset in cystic fibrosis (CF) research, although there are a number of concerns regarding the model ...

Detection of Human Leukocyte Antigen Biomarkers in Breast Cancer Utilizing Label-free Biosensor Technology

ラベルフリーバイオセンサー技術を活用乳癌におけるヒト白血球抗原バイオマーカーの検出

According to the American Cancer Society, more than 200,000 women will be diagnosed with invasive breast cancer each year and approximately 40,000 will ...

Intravital Imaging of Neutrophil Priming Using IL-1&#946; Promoter-driven DsRed Reporter Mice

Intravital Imaging of Neutrophil Priming Using IL-1ÃƒÅ½Ã‚Â² Promoter-driven DsRed Reporter Mice

IL-1βプロモーター駆動のDsRedレポーターマウスを用いた好中球プライミングの生体内イメージング

Neutrophils are the most abundant leukocytes in human blood circulation and are quickly recruited to inflammatory sites. Priming is a critical event that ...

Imaging the Neutrophil Phagosome and Cytoplasm Using a Ratiometric pH Indicator

レシオメトリックpH指示薬を使用して好中球ファゴソームと細胞質のイメージング

Neutrophils are crucial to host innate defense and, consequently, constitute an important area of medical research. The phagosome, the intracellular ...

An All-on-chip Method for Rapid Neutrophil Chemotaxis Analysis Directly from a Drop of Blood

血液滴からの迅速な好中球走化性解析のためのオールオンチップ法

Neutrophil migration and chemotaxis are critical for our body's immune system. Microfluidic devices are increasingly used for investigating neutrophil ...

Label-Free Identification of Lymphocyte Subtypes Using Three-Dimensional Quantitative Phase Imaging and Machine Learning

ラベル無料三次元定量的な位相画像を用いたリンパ球サブタイプの同定と機械学習

We describe here a protocol for the label-free identification of lymphocyte subtypes using quantitative phase imaging and machine learning. Identification ...

Automated Image-Based Quantification of Neutrophil Extracellular Traps Using NETQUANT

NETQUANTを用いた好中球細胞トラップの自動画像ベース定量

Neutrophil extracellular traps (NETs) are web-like antimicrobial structures consisting of DNA and granule derived antimicrobial proteins. ...

Identification of Neutrophil Extracellular Traps in Paraffin-Embedded Feline Arterial Thrombi using Immunofluorescence Microscopy

蛍光免疫顕微鏡を用いたパラフィン組み込みネコリン動脈血栓における好中球外細胞トラップの同定

Neutrophil extracellular traps (NETs), composed of cell-free DNA (cfDNA) and proteins like histones and neutrophil elastase (NE), are released by ...

Label-Free Quantitative Proteomics Workflow for Discovery-Driven Host-Pathogen Interactions

発見駆動型宿主間相互作用のためのラベルフリー定量プロテオミクスワークフロー

The technological achievements of mass spectrometry (MS)-based quantitative proteomics opens many undiscovered avenues for analyzing an organism&#8217;s ...

Quantifying Myeloperoxidase-DNA and Neutrophil Elastase-DNA Complexes from Neutrophil Extracellular Traps by Using a Modified Sandwich ELISA

改変サンドイッチELISAを用いた好中球細胞外トラップからのミエロペルオキシダーゼ-DNAおよび好中球エラスターゼ-DNA複合体の定量(英語)

Certain stimuli, such as microorganisms, cause neutrophils to release neutrophil extracellular traps (NETs), which are basically web-like structures ...