这项工作得到了资金支持fromthe比利时科学研究基金（FNRS），莱斯阿美族DE L&#39;研究所博尔德，FNRS操作Télévie，比利时计划癌症，全宗朗博-Marteaux，全宗JC Heuson和全宗Barsy。

注:使用经研究所朱尔·博尔代的医学伦理委员会与每个病人获得书面知情同意的协议被收购所有标本。 1.制备组织匀浆<ol><li>解剖手术切除组织（恶性和正常组织从手术室切除）是在病理实验室由受过训练的人员立即拾取。肿瘤，NANT（取最远的距离肿瘤的可能），并在1个正常组织碎片常规处理 - 3小时手术切除使用标准的生物安全程序，人体组织在BSL2实验室。该协议的流程图被示于图1。 </li><li>权衡所有组织碎片（正常，NANT和肿瘤），测量的长度，宽度，和高度（长度×宽度×高度）。这对于细胞亚群的随后正常化的一个重要步骤，提取的RNA， 等等。 NOTE:样本量的范围为100至10,000 mm 3的无脂 ​​肪如果可能的话。 </li><li>印上与H＆E染色载玻片的肿瘤片段，以验证该组织实际上是肿瘤的一部分。 <ol><li>通过按肿瘤片段显微镜载玻片和应用温和的压力，用手指几秒钟做到这一点。 </li><li>修复用异丙醇进行2分钟，随后在水中的洗涤步骤的幻灯片。染液组织30秒，Mayer的苏木。 </li><li>在水6浴洗幻灯片。在桃红B染色的2％，持续15秒。 </li><li>在水一浴跟四个浴池异丙醇和完成与水一浴洗。 </li><li>孵育在异丙醇1分钟和漏。清除二甲苯的两个浴室。 </li><li>安装用二甲苯基于安装中。检查对肿瘤细胞结构（ 图2）。 注:主要，肿瘤细胞坚持印记幻灯片 - 间质，淋巴或广告ipose细胞很少残留，而使肿瘤细胞之间的空间（ 图2）。 </li></ol></li><li>放置在含有1ml的化学上确定的，无血清造血细胞培养基的小培养皿所述组织片段（以下简称为培养基）在室温和切块成小块（约1 - 2平方毫米 ），使用无菌的手术刀。 </li><li>转让的一切（组织碎片+介质）的机械离解Ç管。 </li><li>冲洗培养皿并手术刀用2ml使用巴氏吸管介质的，这增加了C管（培养基体积为离解= 3毫升）中。 </li><li>使用机械离解程序A.01对于C管（最温和的程序），以均匀的组织碎片成单细胞悬浮液。放置了C管中的装置和连续运行该程序两次（一个周期= 25秒）。 注意:此均质过程已经建立和验证人类乳房组织，其它匝或者或组织类型可能需要使用不同的程序，应首先进行测试。 </li><li>从装置删除C管，并直接倒出匀浆成40μm的细胞过滤器安置在一个50ml管中。使用相同的巴斯德吸管如在步骤1.6，转移剩余在C管的细胞过滤的任何液体。 </li><li>过滤后的液体转移到一个15毫升的管中，使用1毫升微量移液器尖端。暂时保持细胞过滤和50ml管中。 </li><li>冲洗了C管与另外3毫升培养基并传送此，再次使用相同的巴斯德吸管如在步骤1.6，该细胞过滤仍然落座于50ml管中。通过轻轻地移动它周围的过滤器，用干净巴斯德吸管或1毫升提示，随后丢弃，以避免污染洗脱液挤被困在unhom​​ogenized组织进50毫升管中的残留液体的最大量。 </li><li>将细胞过滤对T倒挂他原来的C管和漂洗用3ml培养基，使得unhom​​ogenized组织降回到C管。 </li><li>再均匀化作为用于A.01程序的两个周期的步骤1.7。 </li><li>倾通过细胞过滤网落座于50ml管中该第二匀浆，再次冲洗了C管用3ml培养基（如在步骤1.10），并使用巴斯德吸管转移到细胞过滤落座于50ml管中再次挤压的最大从残留的结缔组织截留在细胞过滤的液体量。 </li><li>在这一点上，约2.5毫升的体积是在15ml试管和〜9毫升50毫升管。 </li></ol> 2.分离的组织上清和细胞<ol><li>离心在15毫升匀浆和50ml试管15分钟，在600×g离心，在室温下进行。 </li><li>滗从15毫升管中的SN到干净的管中并暂时储存在4℃。这上清=原发肿瘤，NANT或正常TIssue SN（最终体积2.5ml）中，随后澄清并在-80℃下以供将来分析（见下文）在存储之前等分。 </li><li>丢弃从50ml管中的上清液。 </li><li>在1毫升培养基中的终体积轻轻悬浮两种细胞粒料。简要地说，首先轻轻（轻敲管上的硬表面）打破在两个管中的细胞沉淀。重悬松散细胞沉淀在50ml的用500μl培养基中，该细胞悬浮液转移到15毫升管重新悬浮所述第二颗粒。与第二500μl的培养基中对细胞的最大回收重复此步骤一次。 </li><li>转移10微升细胞悬浮液至小管中，混合10微升台盼蓝（稀释1:1），并计算使用血球存活细胞的数目。 注意:在这一点上的细胞悬浮液的一小部分，也可以通过流式细胞术分析来评估细胞大小，粒度并且如果需要的亚群的标记有限数量的更多PREC在匀浆中相对细胞分布之前广泛分析或实验伊势评估。所有的分析流式细胞仪结合CD45标签的亚正常化。 </li><li>通过离心沉淀细胞，在300×g离心10分钟，在室温下。从肿瘤，NANT，或正常组织的细胞是现在已准备好用于进一步纯化或分析。这些额外的步骤是最好在同一天进行的外科手术时。 注:对于流式细胞仪分析，但不是细胞分选的残余红细胞应抗体标记后，加入0.4红血细胞裂解缓冲液，以细胞沉淀，立即为1秒涡旋并温育至少10分钟，在室温进行裂解温度（避光）分析之前。 </li></ol> 3.澄清组织的上清液<ol><li>离心1.5 mL管与组织SN在15000 XG为15分钟，在4℃。 </li><li>小心地取出吨他上清液不接触或干扰球。转移到一个干净的试管（或管），这取决于所述数量和期望的等分试样的体积。 </li><li>存储上清液在-80℃下以供将来使用。 </li></ol> 4.患者血<ol><li>收集从每个病人作为对照通过静脉穿刺到肝素化管中的前一天，以外科手术的血液样品。离心血液于400×g离心10分钟，在20ºC与制动切断以获得血浆和血沉棕黄层。 </li><li>取出血浆，并通过离心，在20ºC澄清它以10,000×g离心15分钟。等分试样并储存血浆在-80℃下以供将来使用。淡化捉鬼外套中等</li><li>分离使用标准聚蔗糖 - 泛影葡胺密度梯度离心之前立即进行分析，亚群分离，DNA / RNA /蛋白质的提取或超低温保存的单核细胞。 </li></ol> 5.流式细胞仪<ol><li>根据制造标签的细胞的r指令在4℃，避光。裂解红血细胞在从抗体标记后的组织碎片的细胞悬浮液通过加入0.4毫升的细胞裂解缓冲液，以细胞沉淀。 </li><li>涡旋立即1秒和孵化至少在室温下10分钟，避光。通过在流式细胞仪进行数据采集，而不洗涤标记的细胞。 </li></ol>

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The authors declare that no conflict of interest exists.

该研究描述了在正常和恶性乳腺组织匀浆中迅速地制备无酶消化用于随后的细胞分选，提取，冷冻保存和/或CD45 +亚群的表型分析的优化方法。本实验方法的目标是产生紧密反映其在体内的状态，将它们与从手术室新鲜组织的最低限度的操作比较正常组织的TIL的图像。到今天为止，我们的实验室已使用此协议分析&gt; 250新鲜BC组织（肿瘤和NANT），&gt; 35正常乳腺组织，从乳腺减少。原?...

The tumor microenvironment is composed of various cell types with numerous studies showing they each play distinct and important roles in tumorigenesis1,2. These include, but are not limited to, infiltrating immune cells, stromal cells, endothelial cells and tumor cells3. Ex vivo studies of tumor infiltrating lymphocytes (TIL; CD45+ cells or leukocytes, which are predominantly lymphocytes in breast tumors) from fresh human tissue samples is made difficult by their low frequency, the small sample sizes often available for research and the potential for loss of viability during extraction. Because immune cells infiltrating tumors are usually present as passengers rather than permanent residents in general they are easier to release from the tissue matrix.
Dissociating tumor tissue while maintaining cellular integrity is technically challenging and has traditionally been performed using a combination of mechanical and enzymatic steps to prepare single cell suspensions4-8. This approach involves lengthy incubation periods and is associated with a significant reduction in cell viability as well as the loss of cell surface receptors by enzymatic cleavage. High quality flow cytometric studies characterizing TIL in the tumor microenvironment as well as clean purifications of CD45+ subpopulations by flow cytometry or antibody-coated beads are more difficult to achieve from enzyme-digested tumor tissue. In addition, the supernatant (SN) from the resulting tumor homogenate is not amenable to further analysis including quantification of secreted proteins (cytokines, chemokines, immunoglobulins or tumor antigens) or experimental treatment of normal cells, because of the potential for protein degradation in the enzymatic digests.
In our search for a method to prepare single cell homogenates from breast tissues [including tumor, non-adjacent non-tumor (NANT) and normal (from mammary reductions) breast tissues] without enzymatic digestion, we tested a variety of mechanical homogenization techniques. Homogenates prepared using a mechanical dissociator had increased cell viability (2-fold) and total cell recovery (2-fold) while preserving surface receptor expression. Enzymatic digestion of the remaining insoluble material did not recover additional CD45+ cells suggesting they were all released in the initial homogenate. Thus, this rapid and simple approach allows both qualitative and quantitative assessment of the CD45+ subpopulations present in various normal and malignant human tissues. An added advantage of this approach is that the SN from the initial homogenate (primary tissue SN) can be collected and stored for further analysis or experimentation.

<table><tbody><tr><td>GentleMacs Dissociator</td><td>Miltenyi Biotec</td><td>130-093-235</td><td>BD Medimachine is somewhat equivalent</td></tr><tr><td>Centrifuge 5810 R</td><td>Eppendorf</td><td></td><td>or other standard table top centrifuge</td></tr><tr><td>Centrifuge 5417 R</td><td>Eppendorf</td><td></td><td>or other standard microcentrifuge</td></tr><tr><td>Esco Class II A2 Biosafety Cabinet</td><td>ESCO global</td><td></td><td>or other standard BSL2 hood</td></tr><tr><td>Inverted Microscope</td><td>Nikon eclipse TS100</td><td></td><td>or other microscope compatible for a hemacytometer</td></tr><tr><td>B&amp;uuml;rker Chamber</td><td>Marienfield&amp;nbsp;</td><td>640210</td><td>or other standard hemacytometer</td></tr><tr><td>Navios Flow Cytometer</td><td>Beckman Coulter</td><td></td><td>or other flow cytometer (8-10 color recommended)</td></tr><tr><td>GentleMacs C-Tube</td><td>Miltenyi Biotec</td><td>130-096-344</td><td>BD Medimachine uses Filcon</td></tr><tr><td>Cell Culture Dish</td><td>Sarstedt</td><td>72,710</td><td>or other non-pyrogenic plasticware</td></tr><tr><td>Disposable Scalpel</td><td>Swann-Morton</td><td>0510</td><td>or standard single use sterile scalpel</td></tr><tr><td>BD Cell Strainer 40 &amp;micro;m</td><td>Becton Dickinson</td><td>734-0002</td><td>or other non-pyrogenic plasticware</td></tr><tr><td>BD Falcon Tube 50 ml</td><td>Becton Dickinson</td><td>352070</td><td>or other non-pyrogenic plasticware</td></tr><tr><td>BD Falcon Tube 15 ml</td><td>Becton Dickinson</td><td>352097</td><td>or other non-pyrogenic plasticware</td></tr><tr><td>BD FACS Tube 5 ml</td><td>Becton Dickinson</td><td>352008</td><td>or other non-pyrogenic plasticware</td></tr><tr><td>Sterile Pasteur Pipette 5 ml</td><td>VWR</td><td>612-1685</td><td>or other non-pyrogenic plasticware</td></tr><tr><td>Microfuge Tube 1.5 ml</td><td>Eppendorf</td><td>7805-00</td><td>or other non-pyrogenic plasticware</td></tr><tr><td>X-Vivo 20</td><td>Lonza</td><td>BE04-448Q</td><td>serum-free medium recommended</td></tr><tr><td>Phosphate buffered saline</td><td>Lonza</td><td>BE17-516F</td><td>standard physiological PBS</td></tr><tr><td>Trypan blue</td><td>VWR</td><td>17942E</td><td>or other vital stain</td></tr><tr><td>VersaLyse</td><td>Beckman Coulter</td><td>A09777</td><td>for flow cytometry experiments</td></tr><tr><td>Fixable viability Dye eFluor 780</td><td>eBioscience</td><td>65-0865-14</td><td>for flow cytometry experiments</td></tr><tr><td>anti-CD3 FITC</td><td>BD Biosciences</td><td>345763</td><td>for flow cytometry experiments</td></tr><tr><td>anti-CD3 Vio Blue</td><td>Miltenyi Biotec</td><td>130-094-363</td><td>for flow cytometry experiments</td></tr><tr><td>anti-CD4 PE</td><td>BD Biosciences</td><td>345769</td><td>for flow cytometry experiments</td></tr><tr><td>anti-CD4 APC</td><td>Miltenyi Biotec</td><td>130-091-232</td><td>for flow cytometry experiments</td></tr><tr><td>anti-CD8 ECD</td><td>Beckman Coulter</td><td>737659</td><td>for flow cytometry experiments</td></tr><tr><td>anti-CD8 PerCP</td><td>BD Biosciences</td><td>345774</td><td>for flow cytometry experiments</td></tr><tr><td>anti-CD19 APC-Vio770</td><td>Miltenyi Biotec</td><td>130-096-643</td><td>for flow cytometry experiments</td></tr><tr><td>anti-CD45 VioGreen</td><td>Miltenyi Biotec</td><td>130-096-906</td><td>for flow cytometry experiments</td></tr></tbody></table>

a simple and rapid protocol to non-enzymatically dissociate fresh human tissues for the analysis of infiltrating lymphocytes

恶性细胞逃避免疫系统，从先天性和适应性免疫应答特征为肿瘤逃逸的能力现在被接受为癌症的重要标志。我们对乳癌的研究主要集中在积极的作用，肿瘤浸润淋巴细胞肿瘤进展和患者预后发挥。为了实现这一目标，我们制定了正常和异常组织完整淋巴样细胞的快速分离的方法，努力以评估他们接近他们的原生状态。匀浆用机械离解秀既增加了活力和细胞的恢复，同时保持表面受体的表达相比，酶消化的组织准备。另外，剩余的不溶物的酶消化未恢复额外的CD45 +细胞表示在初级匀浆的定量和定性测量可能真正反映在组织fragm浸润亚耳鼻喉科。在淋巴样细胞中这些匀浆可以容易地使用免疫（表型，细胞增殖等 ）或分子（DNA，RNA和/或蛋白质），其特征接近。 CD45 +细胞也可以用于亚群纯化， 体外扩增或冷冻保存。这种方法的一个额外的好处是，从匀浆主组织上清液可用于表征和比较细胞因子，趋化因子，免疫球蛋白和抗原存在于正常和恶性组织。这个协议功能非常好为人类乳房组织和应适用于各种各样的正常和异常组织。

组织碎片用可商购的组织离解的溶液或胶原酶的各种实验室的混合物，DNA酶和/或透明质酸酶抑制剂酶消化，切割各种各样的受体的细胞的表面上。我们的研究中，最初集中在CD4 + T细胞浸润乳腺肿瘤，很快出现一个主要的技术问题，是由于使用标准酶消化协议4-8表面的CD4受体的裂解。我们测试了多种胶原酶的酶有或无DNA酶和透明质酸酶抑制剂，发现胶原酶I和II完全从细胞表面除去?...

Watch this Scientific Journal Video about A Simple and Rapid Protocol to Non-enzymatically Dissociate Fresh Human Tissues for the Analysis of Infiltrating Lymphocytes at JoVE.com

A Simple and Rapid Protocol to Non-enzymatically Dissociate Fresh Human Tissues for the Analysis of Infiltrating Lymphocytes

This protocol describes the rapid non-enzymatic dissociation of fresh human tissue fragments for qualitative and quantitative assessment of CD45+ cells (lymphocytes/leukocytes) present in various normal and malignant human tissues. Additionally, the supernatant obtained from the primary tissue homogenate can be collected and stored for further analysis or experimentation.

一种简单快速议定书非酶离解新鲜人组织的浸润淋巴细胞的分析

The ability of malignant cells to evade the immune system, characterized by tumor escape from both innate and adaptive immune responses, is now accepted ...

a-simple-rapid-protocol-to-non-enzymatically-dissociate-fresh-human

Research

JoVE Journal

Immunology and Infection

19.9K 次观看.  Université Libre de Bruxelles. This protocol describes the rapid non-enzymatic dissociation of fresh human tissue fragments for qualitative and quantitative assessment of CD45+ cells (lymphocytes/leukocytes) present in various normal and malignant human tissues. Additionally, the supernatant obtained from the primary tissue homogenate can be collected and stored for further analysis or experimentation.

视频: A Simple and Rapid Protocol to Non-enzymatically Dissociate Fresh Human Tissues for the Analysis of Infiltrating Lymphocytes

Isolation of Myeloid Dendritic Cells and Epithelial Cells from Human Thymus

In this protocol we provide a method to isolate dendritic cells (DC) and epithelial cells (TEC) from the human thymus. DC and TEC are the major antigen presenting cell (APC) types found in a normal thymus and it is well established that they play distinct roles during thymic selection. These cells are localized in distinct microenvironments in the thymus and each APC type makes up only a minor population of cells. To further understand the biology of these cell types, characterization of these cell populations is highly desirable but due to their low frequency, isolation of any of these cell types requires an efficient and reproducible procedure. This protocol details a method to obtain cells suitable for characterization of diverse cellular properties. Thymic tissue is mechanically disrupted and after different steps of enzymatic digestion, the resulting cell suspension is enriched using a Percoll density centrifugation step. For isolation of myeloid DC (CD11c+), cells from the low-density fraction (LDF) are immunoselected by magnetic cell sorting. Enrichment of TEC populations (mTEC, cTEC) is achieved by depletion of hematopoietic (CD45hi) cells from the low-density Percoll cell fraction allowing their subsequent isolation via fluorescence activated cell sorting (FACS) using specific cell markers. The isolated cells can be used for different downstream applications.

This protocol details a method to isolate antigen presenting cells from human thymus via different steps of enzymatic digestion of the tissue followed by density centrifugation of the single cell suspension and finally magnetic and/or FACS sorting of the cell populations of interest.

从人类胸腺髓样树突状细胞和上皮细胞的分离

In this protocol we provide a method to isolate dendritic cells (DC) and epithelial cells (TEC) from the human thymus. DC and TEC are the major antigen ...

科研

免疫与感染

Isolation of Murine Lymph Node Stromal Cells

Secondary lymphoid organs including lymph nodes are composed of stromal cells that provide a structural environment for homeostasis, activation and differentiation of lymphocytes. Various stromal cell subsets have been identified by the expression of the adhesion molecule CD31 and glycoprotein podoplanin (gp38), T zone reticular cells or fibroblastic reticular cells, lymphatic endothelial cells, blood endothelial cells and FRC-like pericytes within the double negative cell population. For all populations different functions are described including, separation and lining of different compartments, attraction of and interaction with different cell types, filtration of the draining fluidics and contraction of the lymphatic vessels. In the last years, different groups have described an additional role of stromal cells in orchestrating and regulating cytotoxic T cell responses potentially dangerous for the host. 
Lymph nodes are complex structures with many different cell types and therefore require a appropriate procedure for isolation of the desired cell populations. Currently, protocols for the isolation of lymph node stromal cells rely on enzymatic digestion with varying incubation times; however, stromal cells and their surface molecules are sensitive to these enzymes, which results in loss of surface marker expression and cell death. Here a short enzymatic digestion protocol combined with automated mechanical disruption to obtain viable single cells suspension of lymph node stromal cells maintaining their surface molecule expression is proposed.

Isolation of lymph node stromal cells is a multistep procedure including enzymatic digestion and mechanical disaggregation to obtain fibroblastic reticular cells, lymphatic and blood endothelial cells. In the described procedure, a short digestion is combined with automated mechanical disaggregation to minimize surface marker degradation of viable lymph node stromal cells.

鼠淋巴结基质细胞的分离

Secondary lymphoid organs including lymph nodes are composed of stromal cells that provide a structural environment for homeostasis, activation and ...

Lymphocyte Isolation from Human Skin for Phenotypic Analysis and Ex Vivo Cell Culture

Human skin has an important barrier function and contains various immune cells that contribute to tissue homeostasis and protection from pathogens. As the skin is relatively easy to access, it provides an ideal platform to study peripheral immune regulatory mechanisms. Immune resident cells in healthy skin conduct immunosurveillance, but also play an important role in the development of inflammatory skin disorders, such as psoriasis. Despite emerging insights, our understanding of the biology underlying various inflammatory skin diseases is still limited. There is a need for good quality (single) cell populations isolated from biopsied skin samples. So far, isolation procedures have been seriously hampered by a lack of obtaining a sufficient number of viable cells. Isolation and subsequent analysis have also been affected by the loss of immune cell lineage markers, due to the mechanical and chemical stress caused by the current dissociation procedures to obtain single cell suspension. Here, we describe a modified method to isolate T cells from both healthy and involved psoriatic human skin by combining mechanical skin dissociation using an automated tissue dissociator and collagenase treatment. This methodology preserves expression of most immune lineage markers such as CD4, CD8, Foxp3 and CD11c upon the preparation of single cell suspensions. Examples of successful CD4+ T cell isolation and subsequent phenotypic and functional analysis are shown.

Lymphocyte Isolation from Human Skin for Phenotypic Analysis and Ex Vivo Cell Culture

We describe a protocol to efficiently isolate skin resident T cells from human skin biopsies. This protocol yields sufficient numbers of viable human skin resident lymphocytes for flow cytometric analysis and ex vivo culture.

从表型分析和人体皮肤淋巴细胞分离<em&gt;离体</em&gt;细胞培养

Human skin has an important barrier function and contains various immune cells that contribute to tissue homeostasis and protection from pathogens. As the ...

用于单细胞 RNA 测序分析的肿瘤解离方案

Dissociation of Human and Mouse Tumor Tissue Samples for Single-cell RNA Sequencing

Human tumor samples hold a plethora of information about their microenvironment and immune repertoire. Effective dissociation of human tissue samples into viable cell suspensions is a required input for the single-cell RNA sequencing (scRNAseq) pipeline. Unlike bulk RNA sequencing approaches, scRNAseq enables us to infer the transcriptional heterogeneity in tumor specimens at the single-cell level. Incorporating this approach in recent years has led to many discoveries, such as identifying immune and tumor cellular states and programs associated with clinical responses to immunotherapies and other types of treatments. Moreover, single-cell technologies applied to dissociated tissues can be used to identify accessible chromatin regions T and B cell receptor repertoire, and the expression of proteins, using DNA barcoded antibodies (CITEseq).
The viability and quality of the dissociated sample are critical variables when using these technologies, as these can dramatically affect the cross-contamination of single cells with ambient RNA, the quality of the data, and interpretation. Moreover, long dissociation protocols can lead to the elimination of sensitive cell populations and the upregulation of a stress response gene signature. To overcome these limitations, we devised a rapid universal dissociation protocol, which has been validated on multiple types of human and murine tumors. The process begins with mechanical and enzymatic dissociation, followed by filtration, red blood lysis, and live dead enrichment, suitable for samples with a low input of cells (e.g., needle core biopsies). This protocol ensures a clean and viable single-cell suspension paramount to the successful generation of Gel Bead-In Emulsions (GEMs), barcoding, and sequencing.

作者聚焦:探索成功针对肿瘤的免疫应答策略

This protocol outlines the procedure for rapidly dissociating human and mouse tumor samples for single-cell RNA sequencing.

解离人和小鼠肿瘤组织样品用于单细胞 RNA 测序

Human tumor samples hold a plethora of information about their microenvironment and immune repertoire. Effective dissociation of human tissue samples into ...

癌症研究

Isolation of Human Lymphatic Endothelial Cells by Multi-parameter Fluorescence-activated Cell Sorting

Lymphatic system disorders such as primary lymphedema, lymphatic malformations and lymphatic tumors are rare conditions that cause significant morbidity but little is known about their biology. Isolating highly pure human lymphatic endothelial cells (LECs) from diseased and healthy tissue would facilitate studies of the lymphatic endothelium at genetic, molecular and cellular levels. It is anticipated that these investigations may reveal targets for new therapies that may change the clinical management of these conditions. A protocol describing the isolation of human foreskin LECs and lymphatic malformation lymphatic endothelial cells (LM LECs) is presented. To obtain a single cell suspension tissue was minced and enzymatically treated using dispase II and collagenase II. The resulting single cell suspension was then labelled with antibodies to cluster of differentiation (CD) markers CD34, CD31, Vascular Endothelial Growth Factor-3 (VEGFR-3) and PODOPLANIN. Stained viable cells were sorted on a fluorescently activated cell sorter (FACS) to separate the CD34LowCD31PosVEGFR-3PosPODOPLANINPos LM LEC population from other endothelial and non-endothelial cells. The sorted LM LECs were cultured and expanded on fibronectin-coated flasks for further experimental use.

The goal of this protocol is to isolate lymphatic endothelial cells lining human lymphatic malformation cyst-like vessels and foreskins using fluorescence-activated cell sorting (FACS). Subsequent cell culturing and expansion of these cells permits a new level of experimental sophistication for genetic, proteomic, functional and cell differentiation studies.

人淋巴管内皮细胞中的多参​​数荧光激活细胞分选分离

Lymphatic system disorders such as primary lymphedema, lymphatic malformations and lymphatic tumors are rare conditions that cause significant morbidity ...

医学

An Optimized Protocol to Analyze Glycolysis and Mitochondrial Respiration in Lymphocytes

Lymphocytes respond to a variety of stimuli by activating intracellular signaling pathways, which in turn leads to rapid cellular proliferation, migration and differentiation, and cytokine production. All of these events are tightly linked to the energy status of the cell, and therefore studying the energy-producing pathways may give clues about the overall functionality of these cells. The extracellular flux analyzer is a commonly used device for evaluating the performance of glycolysis and mitochondrial respiration in many cell types. This system has been used to study immune cells in a few published reports, yet a comprehensive protocol optimized particularly for lymphocytes is lacking. Lymphocytes are fragile cells that survive poorly in ex vivo conditions. Oftentimes lymphocyte subsets are rare, and working with low cell numbers is inevitable. Thus, an experimental strategy that addresses these difficulties is required. Here, we provide a protocol that allows for rapid isolation of viable lymphocytes from lymphoid tissues, and for the analysis of their metabolic states in the extracellular flux analyzer. Furthermore, we provide results of experiments in which the metabolic activities of several lymphocyte subtypes at different cell densities were compared. These observations suggest that our protocol can be used to achieve consistent, well-standardized results even at low cell concentrations, and thus it may have broad applications in future studies focusing on the characterization of metabolic events in immune cells.

The study of metabolism is becoming increasingly relevant to immunological research. Here, we present an optimized method for measuring glycolysis and mitochondrial respiration in mouse splenocytes, and T and B lymphocytes.

一种优化的协议分析和糖酵解线粒体呼吸的淋巴细胞

Lymphocytes respond to a variety of stimuli by activating intracellular signaling pathways, which in turn leads to rapid cellular proliferation, migration ...

Collection and Processing of Lymph Nodes from Large Animals for RNA Analysis: Preparing for Lymph Node Transcriptomic Studies of Large Animal Species

Large animals (both livestock and wildlife) serve as important reservoirs of zoonotic pathogens, including Brucella, Mycobacterium bovis, Salmonella, and E. coli, and are useful for the study of pathogenesis and/or spread of the bacteria in natural hosts. With the key function of lymph nodes in the host immune response, lymph node tissues serve as a potential source of RNA for downstream transcriptomic analyses, in order to assess the temporal changes in gene expression in cells over the course of an infection. This article presents an overview of the process of lymph node collection, tissue sampling, and downstream RNA processing in livestock, using cattle (Bos taurus) as a model, with additional examples provided from the American bison (Bison bison). The protocol includes information about the location, identification, and removal of lymph nodes from multiple key sites in the body. Additionally, a biopsy sampling methodology is presented that allows for a consistency of sampling across multiple animals. Several considerations for sample preservation are discussed, including the generation of RNA suitable for downstream methodologies like RNA-sequencing and RT-PCR. Due to the long delays inherent in large animal vs. mouse time course studies, representative results from bison and bovine lymph node tissues are presented to describe the time course of the degradation in this tissue type, in the context of a review of previous methodological work on RNA degradation in other tissues. Overall, this protocol will be useful to both veterinary researchers beginning transcriptome projects on large animal samples and to molecular biologists interested in learning techniques for in vivo tissue sampling and in vitro processing.

This protocol provides an overview of procedures for the isolation of RNA for the transcriptomic profiling of lymph node tissues from large animals, including steps in the identification and excision of lymph nodes from livestock and wildlife, sampling approaches to provide consistency across multiple animals, and considerations plus representative results for the post-collection preservation and processing for RNA analysis.

大动物淋巴结的采集与处理 RNA 分析: 大动物 Transcriptomic 淋巴结的制备研究

Large animals (both livestock and wildlife) serve as important reservoirs of zoonotic pathogens, including Brucella, Mycobacterium bovis, Salmonella, and ...

Isolating Lymphocytes from the Mouse Small Intestinal Immune System

The intestinal immune system plays an essential role in maintaining the barrier function of the gastrointestinal tract by generating tolerant responses to dietary antigens and commensal bacteria while mounting effective immune responses to enteropathogenic microbes. In addition, it has become clear that local intestinal immunity has a profound impact on distant and systemic immunity. Therefore, it is important to study how an intestinal immune response is induced and what the immunologic outcome of the response is. Here, a detailed protocol is described for the isolation of lymphocytes from small intestine inductive sites like the gut-associated lymphoid tissue Peyer&#39;s patches and the draining mesenteric lymph nodes and effector sites like the lamina propria and the intestinal epithelium. This technique ensures isolation of a large numbers of lymphocytes from small intestinal tissues with optimal purity and viability and minimal cross compartmental contamination within acceptable time constraints. The technical capability to isolate lymphocytes and other immune cells from intestinal tissues enables the understanding of immune responses to gastrointestinal infections, cancers, and inflammatory diseases.

Here we describe a detailed protocol for the isolation of lymphocytes from the inductive sites including the gut-associated lymphoid tissue Peyer&#39;s patches and the draining mesenteric lymph nodes, and the effector sites including the lamina propria and the intestinal epithelium of the small intestinal immune system.

小鼠小肠免疫系统淋巴细胞的分离

The intestinal immune system plays an essential role in maintaining the barrier function of the gastrointestinal tract by generating tolerant responses to ...

一种简单快速议定书非酶离解新鲜人组织的浸润淋巴细胞的分析

摘要

探索更多视频

此视频中的章节

从人类胸腺髓样树突状细胞和上皮细胞的分离

鼠淋巴结基质细胞的分离

从表型分析和人体皮肤淋巴细胞分离

解离人和小鼠肿瘤组织样品用于单细胞 RNA 测序

解离人和小鼠肿瘤组织样品用于单细胞 RNA 测序

解离人和小鼠肿瘤组织样品用于单细胞 RNA 测序

人淋巴管内皮细胞中的多参数荧光激活细胞分选分离

一种优化的协议分析和糖酵解线粒体呼吸的淋巴细胞

大动物淋巴结的采集与处理 RNA 分析: 大动物 Transcriptomic 淋巴结的制备研究

小鼠小肠免疫系统淋巴细胞的分离

一种简单快速议定书非酶离解新鲜人组织的浸润淋巴细胞的分析

摘要

探索更多视频

此视频中的章节

从人类胸腺髓样树突状细胞和上皮细胞的分离

鼠淋巴结基质细胞的分离

从表型分析和人体皮肤淋巴细胞分离

解离人和小鼠肿瘤组织样品用于单细胞 RNA 测序

解离人和小鼠肿瘤组织样品用于单细胞 RNA 测序

解离人和小鼠肿瘤组织样品用于单细胞 RNA 测序

人淋巴管内皮细胞中的多参​​数荧光激活细胞分选分离

一种优化的协议分析和糖酵解线粒体呼吸的淋巴细胞

大动物淋巴结的采集与处理 RNA 分析: 大动物 Transcriptomic 淋巴结的制备研究

小鼠小肠免疫系统淋巴细胞的分离

人淋巴管内皮细胞中的多参数荧光激活细胞分选分离