我们要感谢大卫·沃特金斯支持，使该方法存在的优化实验。研究本出版物中报道了由迈阿密中心的美国国立卫生研究院艾滋病研究下奖号P30AI073961提供一个试点补助的部分资助。内容完全是作者的责任，并不一定代表美国国立卫生研究院的官方意见。

在这个手稿中使用的外周血单个核细胞（PBMC）样品从设在威斯康星州国家灵长类动物研究中心的印度猕猴获得。这些动物在威斯康星研究生院动物护理和使用委员会33的大学批准的方案下，根据Weatherall报告进行照顾。麻醉下进行所有动物的程序并作出一切努力，以减少潜在的痛苦。 1.治疗PKI 注意:这是可选的，但建议马牧-B * 017:01四聚体。查看结果和讨论部分 。 <ol><li>重悬的PBMC在1.6×10 7个细胞/ ml的浓度R10培养基。 </li><li>加入50μl该细胞悬浮液，以流式细胞术管相应的流量。加入50μl的PKI的100nM的解决方案，以每一管。 </li><li>涡每管。孵育在37℃下30分钟。由此结束步骤，每个管应具有100μl包含8.0×10 5个 PBMC和PKI的50nM的细胞悬浮液。 </li><li>继续执行的pMHC-I四聚体染色的步骤。 </li></ol> 2.染色用荧光染料标记的pMHC-I四聚体<ol><li>准备之前的pMHC-I四聚体预混，离心机在20000 XG至少15分钟的pMHC-I四管在4℃。这一步骤的目的是，以沉淀蛋白质的聚集体的的pMHC-I四聚体的解决方案，可能会增加背景染色。一旦离心步骤完成后，避免其中蛋白质聚集体将积累在管的底部移液。 </li><li>准备足够的pMHC-I四预混染色所有的实验管。制备的过量的此主混合物的总体积的15％至帐户移液误差。 </li><li>淡化色斑缓冲（ 如辉煌染色缓冲）的pMHC-I四聚体，使25微升的pMHC-I四聚体主结构是ADDEd可每次试验。 <ol><li>标签PBMC每个测试二的pMHC-I四聚体;一种共轭至别藻蓝蛋白（APC），而另一对亮紫（BV）421。 </li></ol></li><li>添加8.0×10 5个 PBMC至流式细胞管相应的流量在100μl的终体积。如果细胞进行上述的PKI的治疗，他们应已再悬浮于100微升在此步骤。 </li><li>加入25微升的pMHC-I四聚体预混到流式细胞仪管相应的流量。通过此步骤结束时，在每个管中的最终体积应为125微升。 </li><li>涡流每个管以匀化细胞悬浮液。 </li><li>孵育在黑暗中在室温下45分钟。 45分钟孵化期间，准备表面染色单克隆抗体的鸡尾酒。 </li></ol> 3.表面染色<ol><li>准备足够的单克隆抗体预混染色所有的实验管。制备的过量的此主混合物的总体积的15％，占移液误差。 </li><li>调整主结构与染色缓冲音量，使50微升的每个测试增加。 </li><li>对于非CD8 + T细胞的适当的排斥和存储器的子集的划分，使用滴定针对在表面染色主混合物以下分子的单克隆抗体的量。 注:缀合到各单克隆抗体的荧光染料提供作为参考:CD14 BV 510，CD16 BV 510，CD20 BV 510，CD8αBV 785，CD28 PE Cy7的，并且CCR7 FITC。需要注意的是对CD14，CD16，和CD20的单克隆抗体缀合到相同的荧光染料（ 即，BV 510），因为它们将被包括在"转储"门。 </li><li>包括在表面染色预混辨别死细胞可修复的染料[即胺活性染料（ARD）。确保ARD试剂缀合到荧光具有类似的发射光谱如在"转储"门使用的。在这种情况下，使用ARD水族。 </li><li>加入50微升染色预混在3.1-3.4描述的流式细胞仪管相应的流量。通过此步骤结束时，在每个管中的最终体积应为175微升。 </li><li>涡每管。孵育在黑暗中在室温下25分钟。 </li><li>洗涤用洗涤缓冲液细胞（含牛血清白蛋白的0.1％和0.45克/升NaN 3的PBS溶液）。 注意:叠氮化钠是一种有毒物质。暴露在即使微量可引起症状。根据在哪里正在执行这些实验机构的环境健康与安全（EHS）办公室指定的指导方针处理这种物质。 </li><li>离心管在510×g离心5分钟。上清液小心地倒入一个单独的废物容器中。一定不要打扰颗粒。 小心:不要滗洗涤缓冲液上清液成含漂白剂储，因为它可以与存在于洗涤缓冲液中的叠氮化钠反应，并导致在有毒气体34的形成。 Contact EHS的办公室那里正在为如何处置叠氮化钠的指导进行这些实验的机构。 </li><li>倾析后，旋涡振荡细胞保持在每个管中的剩余液体。 </li></ol> 4.细胞固定<ol><li>加入250微升2％的多聚甲醛（PFA）溶液的所有管，以固定细胞。 注意:PFA是一种有毒物质。暴露在即使微量可引起症状。根据在哪里正在执行这些实验的机构，由EHS办公室指定的指导方针处理这种物质。 <ol><li>由于2％PFA溶液必须是等渗的细胞，使用PBS制备该溶液。 2％的PFA溶液的百毫升就足够了多个实验。彻底振荡试管，以防止细胞聚集体的形成的另外2％PFA中后，立即。 </li></ol></li><li>孵育在黑暗中在4℃下20分钟。 </li><li> W¯¯灰细胞通过重复步骤3.7-3.9。一旦该步骤完成后，可以将细胞储存在黑暗中在4℃下24-48小时。在开始的阶段透，彻底涡管。 </li></ol> 5.通透细胞<ol><li>加入500μl通透缓冲。振荡试管。 </li><li>孵育在黑暗中在室温下10分钟。 </li><li>通过重复步骤3.7-3.9洗涤细胞。 </li></ol> 6.细胞内染色<ol><li>准备足够的单克隆抗体预混染色所有的实验管。 </li><li>调整用PBS体积或使细胞内的mAb主混合物的50微升被每个测试加入染色缓冲液中。 </li><li>在准备6.1和6.2中所述的单克隆抗体主结构采用滴定针对CD3和GZM B.单克隆抗体量 注:通过的pMHC-I四聚体的TCR接合可导致CD3内化，其可以与检测四聚体+ CD3 + CD8的干扰+T细胞，如果抗CD3单克隆抗体被加入到表面染色母液。为了避免这种情况，添加抗CD3单克隆抗体在此阶段，即，将细胞透化之后。缀合到每种mAb的荧光染料列出作为参考:CD3 PerCP经Cy5.5和GZM乙聚乙烯。 </li><li>加入50μl的mAb鸡尾酒到相应的管中。孵育在黑暗中在室温下30分钟。 </li><li>通过重复步骤3.7-3.9洗涤细胞。管子准备在流式细胞仪获得。 </li></ol>

<ol>
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The authors declare that they have no competing financial interests.

在此过程中值得讨论的有几个步骤，因为它们是产生最佳效果的关键。首先，由于生物样本的质量是任何流式细胞测定法38的成功的一个强有力的预测，都必须小心，以确保细胞是染色过程中存活，并在悬浮液中。与冷冻保存的样品时，因为它们更容易结块和通常含有死细胞的更高数量，这是特别相关的。在这些情况下，通过将细胞悬浮液通过的pMHC-I四聚体标记过程之前的70微米的细胞滤网可能大大改善的结果。第二，在测定中使用的荧光染料的适当的补偿是准确的数据分析的关键，尤其是当多个参数在相同的实验进行评估。在这方面，建议新鲜单色彩补偿控制来对每个的pMHC-I四聚体随时准备投入泰宁检测。我们主张，因为其广泛的抗Ig反应，事实上，它们产生正面和负面的人群明确的双峰分布的补偿款使用的珠子。由于这些珠粒不结合的MHC-I类分子，抗体缀合到相同的荧光团作为的pMHC-I四聚体（ 例如 ，APC和BV 421）应该被用作补偿控制。数的这种补偿珠粒可从多个供应商，并应根据制造商的说明使用。第三，由于在这里所描述的表型的策略需要基于三个分子（ 即，CD28，CCR7，以及GZM B）所示，选通控制，如荧光减一（FMO）试验的分级表达CD8 + T细胞亚群的划分或同种型匹配抗体，应该用于促进这些类型的分析。在我们的实验，例如，将含有的pMHC-I四聚体+ CD8 + T细胞群体感兴趣的分离的管重新总是与缀合到相同的荧光染料作为对CD28，CCR7，以及GZM B.重要的单克隆抗体同种型对照单克隆抗体染色，虽然上述准则可能有助于改善的整体质量的pMHC-I四聚体染色，它们不是唯一的变量可能会影响该测定的性能。考虑到每一个实验室环境的独特性，这里所描述的整个工作流程应在模拟样本进行至少一次，以允许实践和相应的调整。 奇怪的是，的pMHC-I四聚体阳性CD8 + T细胞在外周血单个核细胞偶尔观察到SIV幼稚（未感染的和未接种）恒河猴。这些情况下，不会出现是背景染色的基于数据的视觉检查的结果。相反，他们可能反映的pMHC-I分子和杀伤免疫球蛋白样受体（的KIRs）之间的相互作用猕猴NK细胞和CD8 + T细胞3的表面上表达9,40。事实上，马目-A1 * 002:01四聚体与对应于加格GY9和Env RY8表位的肽折叠已显示出结合到马目-KIRDL05 39。沿着这些线路，马牧-A1 * 002:01 /加格GY9和马牧-A1 * 002:01 /信封RY8更容易表现出上述银独立的pMHC-I四聚体染色。鉴于这种现象，重要的是控制用于在涉及以下感染或疫苗接种的SIV-特异性CD8 + T细胞应答纵向评估猴实验这个基线反应是很重要的。为了实现这一点，最好是在治疗的第一天获得的样品进行的pMHC-I四聚体染色。它也可能在相关的这些初始时间点的情况下，比较冻结PBMC在几个小规模分装与基线样品需要在未来的实验。 的pMHC-I四聚体染色的一个限制是已知的特异性和MHC-I限制性的c只有CD8 + T细胞一种通过该方法进行研究。这是因为它们的MHC基因位点的复杂组织猕猴尤为重要。事实上，一个单一的猕猴单倍型可以有几十个MHC-I基因，并非所有的编码与在细胞表面29上稳定表达的分子。其结果是，它可能难以确定该组由一个给定的动物表达功能的MHC-I类分子的。 01， 马牧-B * 008:01，和Mamu-不过，这警告可以通过设计实验，包括猴子是积极已知MHC-I等位基因，如马牧-A1 * 001， 马牧-A1 * 002来克服B * 017:01。 总之，本手稿提供了用于确定在恒河猴SIV-特异性CD8 + T细胞的频率和记忆表型的优化的pMHC-I四聚体染色协议。自的pMHC-I四聚体染色比IFN-γELISPOT和ICS测定更敏感的检测抗原特异性CD8的+ T-细胞，并且不需要在体外的Ag的刺激，在这里介绍的方法是研究的CD8 + T细胞应答在免疫缺陷病毒感染的结果的影响是特别有用的。从掌握该技术获得的实际知识也可能是丰富抗原特异性CD8 + T细胞作为功能研究的一部分，在各种疾病的设置6监测的 CD8 + T细胞应答是有用的。

CD8 + T细胞包含适应性免疫系统的重要组成部分，因为它们参与肿瘤免疫监视和向细胞内病原体1根除。简单来说，CD8 + T细胞表达特异性识别肽-主要组织相容性复合体I类（的pMHC-I）中的T细胞受体（TCR）的分子存在于宿主细胞的质膜。因为这些肽是从内源性合成的蛋白的水解产生的，细胞表面的pMHC-I复合物提供了一个窗口，进入细胞内环境。在病毒感染，例如，感染的细胞将显示含有病毒蛋白衍生肽，可以作为配体被巡逻的CD8 + T细胞中表达的TCR的MHC-I类分子。在一个特定的病毒特异性CD8 + T细胞遇到感染细胞呈递其的pMHC-1配体的情况下，T细胞受体接合将导致CD8 + T细胞的激活和大招三方共同导致靶细胞裂解。鉴于这些TCR /的pMHC-I相互作用的关键特性，确定了震级，特异性和响应CD8 + T细胞表型往往能揭示人类疾病的重要线索。 直到20世纪90年代初，抗原特异性CD8 + T细胞的量化依靠技术要求有限稀释法（LDA）2,3-。不仅在LDA需要数天才能完成，因此也未能检测缺乏增殖潜能的细胞。其结果是，在LDA大大低估抗原（抗原）特异性的 CD8 +参与免疫应答的T细胞的实际频率。虽然ELISPOT和细胞内细胞因子染色测定的发展极大地提高测量细胞免疫的能力，这些方法仍然需要在体外刺激用于定量抗原特异性T细胞4。但直到1996年的奥特曼，戴维斯和科尔eagues发表了具有里程碑意义的文章报告的pMHC-I技术的四聚体5的发展。临界该技术的成功是的pMHC-I类分子，其延伸的TCR /的pMHC-Ⅰ相互作用的半衰期，从而减少的pMHC-I四聚体中流式细胞测定法的洗涤步骤脱落的概率的多聚化。的pMHC-I四聚体在上述测定法的主要优点是能够精确地直接离体检测抗原特异性CD8 + T细胞，而无需在体外再刺激的能力。此外，具有多色彩的pMHC-I四聚体染色的组合流式细胞仪已经允许分化阶段，记忆表型，和Ag特异性CD8 + T-细胞2-4的激活状态的详细分析。在最近对通过表征的 CD8 + T细胞所有组成成分的技术进步的光的pMHC-Ⅰ多聚体染色6，应用FO广度R此方法很可能会继续扩大。 在生物医学研究领域很少有比艾滋病病毒免疫学7领域受益更多来自的pMHC-I四聚体染色。虽然CD8 + T细胞曾与由奥特曼，戴维斯和同事8,9出版时HIV病毒血症的初步控制了时间相关的，在随后的几年中使用的pMHC-I四聚体的显著扩大了我们的理解的HIV特异性CD8 + T细胞应答。例如，的pMHC-I四聚体染色帮助确认病毒特异性CD8 + T细胞反应在大多数HIV感染者10-12强劲的大小。这种方法还促进艾滋病毒和SIV特异性CD8 + T细胞应答的通过与在不存在的被称为"精英控制"抗逆转录病毒治疗，这种现象的病毒复制的自发控制相关的MHC-I类分子限制的表征<suP&gt; 13-15。此外，的pMHC-I四聚体是在建立程序性死亡-1（PD-1）/ PD配体1（PD-L1）的轴作为可逆通路中的HIV特异性CD8 + T细胞的不受控制的慢性感染的功能失调的表型器乐16,17。总的来说，这些研究强调的pMHC-I四聚体的效用用于监测针对爱滋病病毒的 CD8 + T细胞应答。 猕猴（ 猕猴 ）的实验SIV感染仍然是防治艾滋病毒/艾滋病18,19评估免疫干预的最佳动物模型。在过去的25年中，实质性的进展已在SIV-特异性CD8 + T细胞在此猴类的鉴定和表征制成，包括MHC-I等位基因的发现和肽结合基序13,20-27的定义。其结果是，的pMHC-I四聚体已经开发了用于SIV-特异性CD8 + T细胞的分析在这种动物模型28的反应。大多数这些试剂是由四猕猴MHC-I等位基因的基因产物: 马目-A1 * 001，马目-A1 * 002:01，马目-B * 008:01，和马目-B * 017:01。值得注意的是，猕猴不发表MHC-C座29。绝大多数在本实验中使用的的pMHC-I四聚体均在埃默里大学美国国立卫生研究院四聚体核心工厂生产。然而，一些这些试剂，包括结合到免疫的Gag CM9表位马目-A1 * 001四聚体，只能从由于许可协议商业来源获得。四个猕猴等位基因使用的pMHC-I四聚体以上列出的，我们已经成功地枚举CD8 + T细胞对共21 SIV抗原表位（ 表1），这是诱导疫苗接种或主SIV感染30,31（马丁等人 ，未发表意见）。 本稿件提供优化的pMHC-I四聚体染色方案，用于确定在恒河猴SIV-特异性CD8 + T细胞的频率和存储器的表型。为了降低TCR内化，从而改善的pMHC-I四聚体染色32;该测定用择孵育30分钟与蛋白激酶抑制剂（这里，达沙替尼使用PKI）的开始。 01四聚体:如下所述，使用马目-B * 017时这种处理是非常有用的。还提供了关于如何标记与荧光标记的pMHC-I四聚体和单克隆抗体（mAb）的细胞的指示。该协议还包括用于将细胞溶解相关分子颗粒酶B（GZM B）的细胞内检测一个细胞透步骤。抗CD3的mAb在此步骤中加入，以及改进这种TCR信号分子的检测。作为参考，在这种染色面板使用的所有荧光被列出。

<table><tbody><tr><td>Dasatinib</td><td>Axon medchem</td><td>Axon&amp;nbsp;1392</td><td>Must be resuspended in DMSO and immediately stored at -20 &amp;deg;C</td></tr><tr><td>RPMI w/ Glutamax</td><td>gibco/ Life Technologies</td><td>61870-036</td><td>Must be stored at 4 &amp;deg;C&amp;nbsp;</td></tr><tr><td>Heat Inactivated FBS</td><td>gibco/ Life Technologies</td><td>10082-147</td><td>Must be stored at 4 &amp;deg;C&amp;nbsp;</td></tr><tr><td>Penicillin-Streptomycinp-Amphotericin B</td><td>Lonza</td><td>17-745E</td><td>Must be stored at 4 &amp;deg;C&amp;nbsp;</td></tr><tr><td>DMSO, Anhydrous</td><td>Life Technologies</td><td>D12345</td><td>Store at room temperature.</td></tr><tr><td>5 ml Round-Bottom Polypropylene Tubes</td><td>VWR</td><td>60819-728</td><td></td></tr><tr><td>Fluorochrome-conjugated pMHC-I tetramers</td><td>NIH Tetramer Core or MBL, Inc.</td><td></td><td>Must be stored and maintained at&amp;nbsp; 4 &amp;deg;C. Centrifuge at 20,000 x g for 15 min before use. Do not freeze.</td></tr><tr><td>Fluorochrome-conjugated mAbs</td><td>Various companies</td><td></td><td>Must be stored and maintained at&amp;nbsp; 4 &amp;deg;C. Do not freeze.</td></tr><tr><td>LIVE/DEAD&amp;nbsp;Fixable Aqua&amp;nbsp;Dead&amp;nbsp;Cell Stain Kit</td><td>Life Technologies</td><td>l34957</td><td>Must be stored at -20 &amp;deg;C. Resuspend each aliquot in 50 &amp;mu;l of DMSO prior to use.</td></tr><tr><td>Brilliant Stain Buffer</td><td>BD Biosciences</td><td>563794</td><td>Must be stored at&amp;nbsp; 4 &amp;deg;C&amp;nbsp;</td></tr><tr><td>Phosphate Buffered Saline</td><td>VWR</td><td>97064-158</td><td>Store at room temperature</td></tr><tr><td>Albumine Bovine</td><td>VWR</td><td>700011-230</td><td>Must be stored at&amp;nbsp; 4 &amp;deg;C&amp;nbsp;</td></tr><tr><td>Sodium Azide</td><td>VWR</td><td>97064-646</td><td>Store at room temperature. Toxic substance. Do not mix with bleach.</td></tr><tr><td>Bleach</td><td>VWR</td><td>89501-620</td><td>Corrosive chemical, cannot be mixed with sodium azide. Handle with care</td></tr><tr><td>Paraformaldehyde</td><td>Electron Microscopy Sciences</td><td>15714-S</td><td>Flammable, corrosive, and toxic reagent. Handle with care</td></tr><tr><td>Polysorbate 20 (Tween-20)</td><td>Alfa Aesar</td><td>L15029</td><td>Store at room temperature</td></tr><tr><td>Permeabilization Solution 2&amp;nbsp;</td><td>BD Biosciences</td><td>340973</td><td>Toxic and corrosive reagent. Handle with care</td></tr><tr><td>Sarsdet Tubes 1.5 ml screw top</td><td>VWR</td><td>72.692.005</td><td></td></tr><tr><td>2.0 ml DNA/RNA Low bind Tubes</td><td>Eppendorf</td><td>22431048</td><td>The use of Sterile microtubes is preffered&amp;nbsp;</td></tr><tr><td>Vortex mixer</td><td>To discretion of scientist</td><td></td><td></td></tr><tr><td>Biosafety Cabinet&amp;nbsp;</td><td>To discretion of scientist</td><td></td><td></td></tr><tr><td>Milli Q Intergral Water Purification system</td><td>EMD Millipore</td><td>ZRXQ010WW</td><td>Molecular Biology grade water from any provider may be used</td></tr><tr><td>Microcentrifuge</td><td>To discretion of scientist</td><td></td><td></td></tr><tr><td>Centrifuge</td><td>To discretion of scientist</td><td></td><td></td></tr><tr><td>4 &amp;deg;C&amp;nbsp; refrigerator</td><td>To discretion of scientist</td><td></td><td></td></tr><tr><td>BD LSR II</td><td>BD Biosciences</td><td></td><td>Flow cytometer must contain lasers and filters that are compatible with the staining panel used.</td></tr><tr><td>Deionized water</td><td></td><td></td><td></td></tr><tr><td>Aluminum Foil</td><td>VWR SCIENTIFIC INC.</td><td>89068-738</td><td></td></tr><tr><td>Incubator</td><td></td><td></td><td>Must be able to maintain 37 &amp;deg;C&amp;nbsp; internal temperature</td></tr><tr><td>FACS Diva software</td><td>BD Biosciences</td><td></td><td></td></tr><tr><td>Flowjo software version 9.6</td><td>Flowjo</td><td></td><td>Used to analyze FCS files generated by FACS Diva software</td></tr><tr><td>Micropippette tips</td><td></td><td></td><td></td></tr></tbody></table>

analysis of simian immunodeficiency virus-specific cd8+ t-cells in rhesus macaques by peptide-mhc-i tetramer staining

肽主要组织相容性复合体I类（的pMHC-I）四聚体一直一个宝贵的工具来研究CD8 + T细胞反应。因为这些试剂直接结合到T细胞受体CD8 + T淋巴细胞的表面上，荧光染料标记的pMHC-I四聚体使抗原的精确检测（银）特异性CD8 + T细胞，而无需在体外重新-stimulation。此外，当多色组合流式细胞仪，的pMHC-I四聚体染色可以揭示抗原特异性CD8 + T细胞的重要方面，包括分化阶段，记忆表型，和激活状态。这些类型的分析已经在HIV免疫学领域特别有用的 CD8 + T细胞可影响发展为艾滋病。猴免疫缺陷病毒的猕猴（SIV）的实验感染提供了一个宝贵的工具来研究针对艾滋病病毒的细胞免疫功能。其结果是，相当大的逐行SS已经在该动物模型定义和表征T细胞应答已取得。在这里，我们提出了一个优化的协议用于通过的pMHC-I四聚体染色猕猴列举SIV-特异性CD8 + T细胞。我们的测定法允许每测试二的pMHC-I四聚体+ CD8 + T细胞群，这可能是用于跟踪由疫苗接种或SIV感染产生SIV-特异性CD8 + T细胞应答有用的同时定量和存储器表型。考虑在生物医学研究非人灵长类动物的相关性，这种方法适用于多种疾病设定学习的 CD8 + T细胞应答。

这里所描述的协议已被用来确定在一个马目-A1 * 001 +猕猴的疫苗诱导的，的Gag CM9特异性CD8 + T细胞应答的大小和存储器的表型。对于这种分析，在一个8色流式细胞术染色面板用的APC-缀合马目-A1 * 001 /加格CM9四聚体。 图1A - F显示用于分析数据，这应适用于存在于每个测试两个四聚体门控策略。需要注意的是的pMHC-I四聚体+ CD8 + T细胞群以及以最小的背景（ 图1F和G）分离。记忆CD8 + T细胞在恒河猴可以被分类为基于CD28和CCR7的表面表达三个子集:中央存储器（T CM; CD28 + CCR7 +），过渡存储器（T EM1; CD28 + CCR7-）和效应内存（T EM2; CD28-CCR7-）35。该协议还包括用于GZM B和CD3的细胞内检测一个细胞透步骤。 图1G - 我展示了四聚体+门内记忆亚群和GZM B-表达CD8 + T细胞的划定。 背景染色可以产生在的pMHC-I四聚体标记检测结果不理想。为了避免这种情况，一些预防措施提出了建议。在协议部分所述，包含的pMHC-I四聚体试剂小瓶应始终在20000 XG离心前主混音的准备至少15分钟。这一步骤的目的是，以沉淀任何蛋白质聚集可能在的pMHC-I四聚体溶液。此外，还建议滴定在使用前每种试剂。理想情况下，MHC-I匹配的那个或不含有目的抗原特异性的 CD8 + T细胞群体应与有关的pMHC-I四聚体标记的细胞。此CAÑ由侧用不同量的一新获得的pMHC-I四聚体由SIV幼稚（阴性对照）和SIV感染（阳性对照）猕猴侧染色冷冻保存的PBMC来完成。在图2中 ，例如，1.0微升/ APC的共轭马目-B * 008的试验:01 / Nef的RL10四聚体，得到四聚体阳性和阴性CD8 + T细胞群之间的最佳的分离。最后荧光的选择也可显著影响从的pMHC-I四聚体染色所获得的结果。在这方面，的pMHC-I四聚体缀合变暗分子（ 例如 ，荧光素）应该避免。在我们的经验，缀合到明亮的荧光染料，如PE，APC和BV 421的pMHC-I四聚体，已经取得了最好的结果。 我们注意到，马牧-B * 017:当结合上面提到的明亮荧光01四聚体通常产生朦胧的染色均匀。这种情况的原因低荧光强度尚不完全清楚，但可能包括低亲和力TCR /马牧-B * 017:01相互作用并在四结合36,37快速TCR内化。沿着这些线路，PKI的已显示出抑制CD8 + T细胞32的表面上的TCR内化。其结果是，PKI的可以提高抗原特异性CD8 + T细胞的pMHC-I四聚体染色检测。我们已经证实在我们的实验中这种效果，其中，马目-B的质量* 017:01四聚体染色可通过预处理与PKI的PBMC（ 图3）可以大大改善。奇怪的是，与此PKI预处理没有显著改善这里测试（数据未示出）等的pMHC-I四聚体的染色，这表明马目-B * 017:01限制的CD8 + T细胞可能是在它们的灵敏度独特以PKI治疗。 <img alt="图1" src="/files/ftp_upload/54881/54881fig1.jpg" /><br/&gt; 图1:闸战略和成功的pMHC-I四聚体染色的代表性结果。我们从马目-A1 * 001 +猕猴评估疫苗诱导的Gag CM9特异性CD8 + T-细胞的大小和记忆表型PBMC中。这里，在一个8色流式细胞术染色面板用的APC-缀合马目-A1 * 001 /加格CM9四聚体。 （A - F）门控策略，流式细胞仪分析。首先，在对角聚集汗衫门被与FSC区（FSC-A），然后一边散射高度（SSC-H）与SSC区域绘制前向散射高度（FSC-H）创建（SSC-A; A和B） 。接下来，时间门被创造，其中包括只有那些记录了5 日和90 日在百分的事件。然后将所得的细胞门控的"转储通道"负，CD3 +细胞（C和D）。在这个阶段中，淋巴细胞群是基于它的FSC-A与SSC-A性能划定并随后分析是内CD8 +细胞（E和F）进行。概述的pMHC-I四聚体+细胞（G）之后，存储器表型分析，此门（H）内进行。猕猴记忆T细胞可以分为基于CD28和CCR7的表达三个子集:中央记忆（T CM; CD28 + CCR7 +），过渡存储器（T EM1; CD28 + CCR7-）和效应记忆（T EM2 ; CD28-CCR7-）。本协议还包括粒酶B（GZM B）的四聚体+ CD8 + T细胞（Ⅰ）中表达的细胞内评价用细胞透步骤。在直方图中的阴影区域对应于四聚体+ CD8 + T细胞与同种型匹配对照mAb染色。尽管BV 421结合的四聚体+人口，这是目前在这个染色在图中未示出，相同的选通策略应该被用来进行分析。 <a href="https://ecsource-jove-com.remotexs.ntu.edu.sg/files/ftp_upload/54881/54881fig1large.jpg" target="_blank">请点击此处查看该图的放大版本。</a> <img alt="图2" src="/files/ftp_upload/54881/54881fig2.jpg" /> 图2:01 / Nef的RL10四:一个APC标记马牧-B * 008的滴定的代表性结果。 PBMC从两个马牧-B * 008:01+猕猴被用于这个实验:一只动物SIV天真并担任阴性对照，而另一个是SIV感染并作为阳性对照。以确定马目-B的量* 008:01 / Nef的RL10四聚能产生四聚体+和tetramer- CD8 + T细胞之间的最佳的分离，从每只动物的PBMC与所示量的的pMHC-I四聚体试剂的孵育。基于这些结果，1.0微升/测试わ选为最佳量s到在将来测定中使用。用于分析该数据的选通策略在图1中说明。 <a href="https://ecsource-jove-com.remotexs.ntu.edu.sg/files/ftp_upload/54881/54881fig2large.jpg" target="_blank">请点击此处查看该图的放大版本。</a> <img alt="图3" src="/files/ftp_upload/54881/54881fig3.jpg" /> 图3:01四聚体:在马目-B * 017的荧光强度的PKI治疗的影响。 PKI的抑制剂抑制T细胞受体复合物的内化和由此通过荧光染料标记的pMHC-I四聚体32提高了抗原特异性CD8 + T细胞的检测。 （A - B）从两个马牧-B * PBMC 017:01+猕猴被用于这个实验:一只猴子是SIV天真并担任阴性对照组（A），而其他被感染SIV并担任阳性对照（B）。来自两个动物的PBMC在37℃下在PKI中的50nM的浓度存在下培养用于与APC缀合的马目-B * 017到染色前30分钟:01 / Nef的IW9四聚体，如在协议部分中描述。作为参考，另一套管进行同样的温育和染色条件，所不同的是二甲基亚砜（DMSO）溶液中加入，而不是公钥基础设施。用于分析该数据的选通策略在图1中说明。 <a href="https://ecsource-jove-com.remotexs.ntu.edu.sg/files/ftp_upload/54881/54881fig3large.jpg" target="_blank">请点击此处查看该图的放大版本。</a> <table fo:keep-together.within-page="1"><tbody><tr><td> SIV蛋白 </td><td> 氨基酸位置 </td><td> 氨基酸序列 </td><td> MHC I类分子（新命名） </td><td> MHC I类分子（老nomenclaturE） </td><td> 表位短名称 </td></tr><tr><td>插科打诨</td><td> 181-189 </td><td> CTPYDINQM </td><td>马牧-A1 * 001 </td><td>马牧-A * 01 </td><td>加格CM9 </td></tr><tr><td>插科打诨</td><td> 254-262 </td><td> QNPIPVGNI </td><td>马牧-A1 * 001 </td><td>马牧-A * 01 </td><td>加格QI9 </td></tr><tr><td>插科打诨</td><td> 72-79 </td><td> GSENLKSLY </td><td>马牧-A1 * 001 </td><td>马牧-A * 01 </td><td>加格GY9 </td></tr><tr><td>信封</td><td> 830-838 </td><td> FHEAVQAVW </td><td>马牧-B * 017:01 </td><td>马牧-B * 17 </td><td>信封FW9 </td></tr><tr><td>信封</td><td> 233-241 </td><td> CAPPGYALL </td><td>马牧-A1 * 001 </td><td>马牧-A * 01 </td><td>信封CL9 </td></tr><tr><td>信封</td><td> 620-628 </td><td> TVPWPNASL </td><td>马牧-A1 * 001 </td><td>马牧-A * 01 </td><td>信封TL9 </td></tr><tr><td>信封</td><td> 788-795 </td><td> RTLLSRVY </td><td>马目-A1 * 002:01 </td><td>马牧-A * 02 </td><td>信封RY8 </td></tr><tr><td>信封</td><td> 296-304 </td><td> RTIISLNKY </td><td>马牧-A1 * 002:01 </td><td>马牧-A * 02 </td><td>信封RY9 </td></tr><tr><td> Vif蛋白</td><td> 123-131 </td><td> RRAIRGEQL </td><td>马牧-B * 008:01 </td><td>马目-B * 08 </td><td> Vif蛋白RL9 </td></tr><tr><td> Vif蛋白</td><td> 173-181 </td><td> RRDNRRGL </td><td>马牧-B * 008:01 </td><td>马目-B * 08 </td><td> Vif蛋白RL8 </td></tr><tr><td> Vif蛋白</td><td> 66-73 </td><td> HLEVQGYW </td><td>马牧-B * 017:01 </td><td>马牧-B * 17 </td><td> Vif蛋白HW8 </td></tr><tr><td> Vif蛋白</td><td> 100-109 </td><td> VTPNYADILL </td><td>马牧-A1 * 001 </td><td>马牧-A * 01 </td><td> Vif的VL10 </td></tr><tr><td> Vif蛋白</td><td> 97-104 </td><td> WTDVTPNY </td><td>马牧-A1 * 002:01 </td><td>马牧-A * 02 </td><td> Vif蛋白WY8 </td></tr><tr><td>启</td><td> 13-22 </td><td> KRLRLIHLL </td><td>马牧-B * 008:01 </td><td>马目-B * 08 </td><td>冯KL9 </td></tr><tr><td>达</td><td> 28-35 </td><td> STPESAML </td><td>马牧-A1 * 001 </td><td>马牧-A * 01 </td><td>达SL8 </td></tr><tr><td>奈夫</td><td> 137-146 </td><td> RRHRILDIYL </td><td>马牧-B * 008:01 </td><td>马目-B * 08 </td><td>奈夫RL10 </td></tr><tr><td>奈夫</td><td> 246-254 </td><td> RRLTARGLL </td><td>马牧-B * 008:01 </td><td>马目-B * 08 </td><td>奈夫RL9b </td></tr><tr><td>奈夫</td><td> 8-16 </td><td> RRSRPSGDL </td><td>马牧-B * 008:01 </td><td>马目-B * 08 </td><td>奈夫RL9a </td></tr><tr><td>奈夫</td><td> 165-173 </td><td> IRYPKTFGW </td><td>马牧-B * 017:01 </td><td>马牧-B * 17 </td><td>奈夫IW9 </td></tr><tr><td>奈夫</td><td> 195-203 </td><td> MHPAQTSQW </td><td>马牧-B * 017:01 </td><td>马牧-B * 17 </td><td>奈夫MW9 </td></tr><tr><td>奈夫</td><td> 159-167 </td><td> YTSGPGIRY </td> &lt;TD&gt;马牧-A1 * 002:01 </td><td>马牧-A * 02 </td><td>奈夫YY9 </td></tr></tbody></table> 表1:可用于在猕猴监测SIV-特异性CD8 + T细胞应答的pMHC-I四聚体的列表。

Watch this Scientific Journal Video about Analysis of Simian Immunodeficiency Virus-specific CD8+ T-cells in Rhesus Macaques by Peptide-MHC-I Tetramer Staining at JoVE.com

Analysis of Simian Immunodeficiency Virus-specific CD8+ T-cells in Rhesus Macaques by Peptide-MHC-I Tetramer Staining

在这里，我们提出了针对艾滋病病毒枚举和表征猕猴CD8 + T细胞的优化协议。本文不仅对HIV免疫学领域，而且也适用于的 CD8 + T细胞应答已知影响疾病结果的生物医学研究的其它领域是有用的。

猴免疫缺陷病毒特异性CD8分析<sup&gt; +</sup&gt; T细胞猕猴由肽MHC-I四聚体染色

Peptide-major histocompatibility complex class I (pMHC-I) tetramers have been an invaluable tool to study CD8+ T-cell responses. Because these reagents ...

analysis-simian-immunodeficiency-virus-specific-cd8-t-cells-rhesus

Nanyang Technological University

Research

JoVE Journal

Immunology and Infection

Analysis of Simian Immunodeficiency Virus-specific CD8+ T-cells in Rhesus Macaques by Peptide-MHC-I Tetramer Staining

9.1K 次观看.  University of Miami. 在这里，我们提出了针对艾滋病病毒枚举和表征猕猴CD8 + T细胞的优化协议。本文不仅对HIV免疫学领域，而且也适用于的 CD8 + T细胞应答已知影响疾病结果的生物医学研究的其它领域是有用的。 

视频: Analysis of Simian Immunodeficiency Virus-specific CD8+ T-cells in Rhesus Macaques by Peptide-MHC-I Tetramer Staining

Multicolor Flow Cytometry Analyses of Cellular Immune Response in Rhesus Macaques

The rhesus macaque model is currently the best available model for HIV-AIDS with respect to understanding the pathogenesis as well as for the development of vaccines and therapeutics1,2,3. Here, we describe a method for the detailed phenotypic and functional analyses of cellular immune responses, specifically intracellular cytokine production by CD4+ and CD8+ T cells as well as the individual memory subsets. We obtained precise quantitative and qualitative measures for the production of interferon gamma (INF-) and interleukin (IL) -2 in both CD4+ and CD8+ T cells from the rhesus macaque PBMC stimulated with PMA plus ionomycin (PMA+I). The cytokine profiles were different in the different subsets of memory cells. Furthermore, this protocol provided us the sensitivity to demonstrate even minor fractions of antigen specific CD4+ and CD8+ T cell subsets within the PBMC samples from rhesus macaques immunized with an HIV envelope peptide cocktail vaccine developed in our laboratory. The multicolor flow cytometry technique is a powerful tool to precisely identify different populations of T cells 4,5 with cytokine-producing capability6 following non-specific or antigen-specific stimulation 5,7.

We demonstrate the utility of multicolor flow cytometry for detailed phenotypic and functional characterization of total as well as memory subsets of CD4+ and CD8+ T cells in rhesus macaques, the ideal model for HIV/AIDS vaccine studies.

多色流流式细胞仪分析细胞在恒河猴的免疫应答

The rhesus macaque model is currently the best available model for HIV-AIDS with respect to understanding the pathogenesis as well as for the development ...

科研

免疫与感染

Retroviral Transduction of T-cell Receptors in Mouse T-cells

T-cell receptors (TCRs) play a central role in the immune system. TCRs on T-cell surfaces can specifically recognize peptide antigens presented by antigen presenting cells (APCs)1. This recognition leads to the activation of T-cells and a series of functional outcomes (e.g. cytokine production, killing of the target cells). Understanding the functional role of TCRs is critical to harness the power of the immune system to treat a variety of immunology related diseases (e.g. cancer or autoimmunity).
It is convenient to study TCRs in mouse models, which can be accomplished in several ways. Making TCR transgenic mouse models is costly and time-consuming and currently there are only a limited number of them available2-4. Alternatively, mice with antigen-specific T-cells can be generated by bone marrow chimera. This method also takes several weeks and requires expertise5. Retroviral transduction of TCRs into in vitro activated mouse T-cells is a quick and relatively easy method to obtain T-cells of desired peptide-MHC specificity. Antigen-specific T-cells can be generated in one week and used in any downstream applications. Studying transduced T-cells also has direct application to human immunotherapy, as adoptive transfer of human T-cells transduced with antigen-specific TCRs is an emerging strategy for cancer treatment6.
Here we present a protocol to retrovirally transduce TCRs into in vitro activated mouse T-cells. Both human and mouse TCR genes can be used. Retroviruses carrying specific TCR genes are generated and used to infect mouse T-cells activated with anti-CD3 and anti-CD28 antibodies. After in vitro expansion, transduced T-cells are analyzed by flow cytometry.

We present a protocol to produce antigen-specific mouse T-cells using retroviral transduction

T细胞受体在小鼠T细胞的逆转录病毒转导

T-cell receptors (TCRs) play a central role in the immune system. TCRs on T-cell surfaces can specifically recognize peptide antigens presented by antigen ...

Peptide:MHC Tetramer-based Enrichment of Epitope-specific T cells

A basic necessity for researchers studying adaptive immunity with in vivo experimental models is an ability to identify T cells based on their T cell antigen receptor (TCR) specificity. Many indirect methods are available in which a bulk population of T cells is stimulated in vitro with a specific antigen and epitope-specific T cells are identified through the measurement of a functional response such as proliferation, cytokine production, or expression of activation markers1. However, these methods only identify epitope-specific T cells exhibiting one of many possible functions, and they are not sensitive enough to detect epitope-specific T cells at naive precursor frequencies. A popular alternative is the TCR transgenic adoptive transfer model, in which monoclonal T cells from a TCR transgenic mouse are seeded into histocompatible hosts to create a large precursor population of epitope-specific T cells that can be easily tracked with the use of a congenic marker antibody2,3. While powerful, this method suffers from experimental artifacts associated with the unphysiological frequency of T cells with specificity for a single epitope4,5. Moreover, this system cannot be used to investigate the functional heterogeneity of epitope-specific T cell clones within a polyclonal population.
	The ideal way to study adaptive immunity should involve the direct detection of epitope-specific T cells from the endogenous T cell repertoire using a method that distinguishes TCR specificity solely by its binding to cognate peptide:MHC (pMHC) complexes. The use of pMHC tetramers and flow cytometry accomplishes this6, but is limited to the detection of high frequency populations of epitope-specific T cells only found following antigen-induced clonal expansion. In this protocol, we describe a method that coordinates the use of pMHC tetramers and magnetic cell enrichment technology to enable detection of extremely low frequency epitope-specific T cells from mouse lymphoid tissues3,7. With this technique, one can comprehensively track entire epitope-specific populations of endogenous T cells in mice at all stages of the immune response.

This protocol describes the use of peptide:MHC tetramers and magnetic microbeads to isolate low frequency populations of epitope-specific T cells and analyze them by flow cytometry. This method enables the direct study of endogenous T cell populations of interest from in vivo experimental systems.

肽:MHC四聚体为基础的抗原表位特异性的T细胞的富集

A  basic necessity for researchers studying adaptive immunity with in vivo experimental models is an  ability to identify T cells based on their T cell ...

Visualizing Antigen Specific CD4+ T Cells using MHC Class II Tetramers

Major histocompatibility complex (MHC) class II tetramers allow the direct visualization of antigen specific CD4+ T cells by flow cytometry.  This method relies on the highly specific interaction between peptide loaded MHC and the corresponding T-cell receptor.  While the affinity of a single MHC/peptide molecule is low, cross-linking MHC/peptide complexes with streptavidin increases the avidity of the interaction, enabling their use as staining reagents.  Because of the relatively low frequencies of CD4+ T cells (~1 in 300,000 for a single specificity) this assay utilizes an in vitro amplification step to increase its threshold of detection.  Mononuclear cells are purified from peripheral blood by Ficoll underlay.  CD4+ cells are then separated by negative selection using biotinylated antibody cocktail and anti-biotin labeled magnetic beads.  Using adherent cells from the CD4- cell fraction as antigen presenting cells, CD4+ T cells are expanded in media by adding an antigenic peptide and IL-2.  The expanded cells are stained with the corresponding class II tetramer by incubating at 37 C for one hour and subsequently stained using surface antibodies such as anti-CD4, anti-CD3, and anti-CD25.  After labeling, the cells can be directly analyzed by flow cytometry.  The tetramer positive cells typically form a distinct population among the expanded CD4+ cells.  Tetramer positive cells are usually CD25+ and often CD4 high.  Because the level of background tetramer staining can vary, positive staining results should always be compared to the staining of the same cells with an irrelevant tetramer.  Multiple variations of this basic assay are possible.  Tetramer positive cells may be sorted for further phenotypic analysis, inclusion in ELISPOT or proliferation assays, or other secondary assays.  Several groups have also demonstrated co-staining using tetramers and either anti-cytokine or anti-FoxP3 antibodies.  

This procedure demonstrates the purification and in vitro expansion of antigen specific CD4+ T cells from whole peripheral blood and their visualization using MHC class II tetramers. Tetramers permit the direct visualization of T cells with a single antigen specificity and defined MHC class II restriction.

可视化抗原特异性CD4 + T细胞的MHC II类四聚四

Major histocompatibility complex (MHC) class II tetramers allow the direct visualization of antigen specific CD4+ T cells by flow cytometry.  This method ...

生物学

A Technique to Simultaneously Visualize Virus-Specific CD8+ T Cells and Virus-Infected Cells In situ

The numbers and locations of virus-specific CD8+ T cells relative to the numbers and locations of their infected cell targets is thought to be critical in determining outcomes that range from clearance to chronic persistent infections. We describe here a method for assessing the spatial and quantitative relationships between immune effector (E) virus-specific CD8+ T cells and infected targets (T) that combines in situ tetramer (IST) staining to detect virus-specific CD8+ T cells and in situ hybridization (ISH) to detect viral-RNA+ cells in the tissues where the battle between immune defenses and infection takes place. The combination of IST staining and ISH, abbreviated ISTH, enables visualization and mapping of the locations of immune effector cells and targets, and facile determination of E:T ratios.  These parameters in turn can then be used to determine the relationships between spatial proximity, and the timing and magnitude of the immune response that predict outcomes in early infection.

A Technique to Simultaneously Visualize Virus-Specific CD8+ T Cells and Virus-Infected Cells In situ

A technique combining in situ tetramer staining and in situ hybridization (ISTH) enables visualization, mapping and analysis of the spatial proximity of virus-specific CD8+ T cells to their virus-infected targets, and determination of the quantitative relationships between these immune effectors and targets to infection outcomes.

一种技术，同时可视化病毒特异性CD8 + T细胞和病毒感染的细胞原位</em

The numbers and locations of virus-specific CD8+ T cells relative to the numbers and locations of their infected cell targets is thought to be critical in ...

In Situ MHC-tetramer Staining and Quantitative Analysis to Determine the Location, Abundance, and Phenotype of Antigen-specific CD8 T Cells in Tissues

T cells are critical to many immunological processes, including detecting and eliminating virus-infected cells, preventing autoimmunity, assisting in B-cell and plasma-cell production of antibodies, and detecting and eliminating cancer cells. The development of MHC-tetramer staining of antigen-specific T cells analyzed by flow cytometry has revolutionized our ability to study and understand the immunobiology of T cells. While extremely useful for determining the quantity and phenotype of antigen-specific T cells, flow cytometry cannot determine the spatial localization of antigen-specific T cells to other cells and structures in tissues, and current disaggregation techniques to extract the T cells needed for flow cytometry have limited effectiveness in non-lymphoid tissues. In situ MHC-tetramer staining (IST) is a technique to visualize T cells that are specific for antigens of interest in tissues. In combination with immunohistochemistry (IHC), IST can determine the abundance, location, and phenotype of antigen-specific CD8 and CD4 T cells in tissues. Here, we describe a protocol to stain and enumerate antigen-specific CD8 T cells, with specific phenotypes located within specific tissue compartments. These procedures are the same that we used in our recent publication by Li et al., entitled &#34;Simian Immunodeficiency Virus-Producing Cells in Follicles Are Partially Suppressed by CD8+ Cells In Vivo.&#34; The methods described are broadly applicable because they can be used to localize, phenotype, and quantify essentially any antigen-specific CD8 T cell for which MHC tetramers are available, in any tissue.

In Situ MHC-tetramer Staining and Quantitative Analysis to Determine the Location, Abundance, and Phenotype of Antigen-specific CD8 T Cells in Tissues

Here, we describe a method that combines in situ MHC-tetramer staining with immunohistochemistry to determine localization, phenotype, and quantity of antigen-specific T cells in tissues. This protocol is used to determine the spatial and phenotypic characteristics of antigen-specific CD8 T cells relative to other cell type and structures in tissues.

原位MHC-聚丙烯染色和定量分析确定抗原特异性 CD8 T 细胞在组织中的位置、丰度和表型

T cells are critical to many immunological processes, including detecting and eliminating virus-infected cells, preventing autoimmunity, assisting in ...

Single-cell Quantitation of mRNA and Surface Protein Expression in Simian Immunodeficiency Virus-infected CD4+ T Cells Isolated from Rhesus macaques

Single-cell analysis is an important tool for dissecting heterogeneous populations of cells. The identification and isolation of rare cells can be difficult. To overcome this challenge, a methodology combining indexed flow cytometry and high-throughput multiplexed quantitative polymerase chain reaction (qPCR) was developed. The objective was to identify and characterize simian immunodeficiency virus (SIV)-infected cells present within rhesus macaques. Through quantitation of surface protein by fluorescence-activated cell sorting (FACS) and mRNA by qPCR, virus-infected cells are identified by viral gene expression, which is combined with host gene and protein measurements to create a multidimensional profile. We term the approach, targeted Single-Cell Proteo-transcriptional Evaluation, or tSCEPTRE. To perform the method, viable cells are stained with fluorescent antibodies specific for surface markers used for FACS isolation of a cell subset and/or downstream phenotypic analysis. Single cells are sorted followed by immediate lysis, multiplex reverse transcription (RT), PCR pre-amplification, and high throughput qPCR of up to 96 transcripts. FACS measurements are recorded at the time of sorting and subsequently linked to the gene expression data by well position to create a combined protein and transcriptional profile. To study SIV-infected cells directly ex vivo, cells were identified by qPCR detection of multiple viral RNA species. The combination of viral transcripts and the quantity of each provide a framework for classifying cells into distinct stages of the viral life cycle (e.g., productive versus non-productive). Moreover, tSCEPTRE of SIV+ cells were compared to uninfected cells isolated from the same specimen to assess differentially expressed host genes and proteins. The analysis revealed previously unappreciated viral RNA expression heterogeneity among infected cells as well as in vivo SIV-mediated post-transcriptional gene regulation with single-cell resolution. The tSCEPTRE method is relevant for the analysis of any cell population amenable to identification by expression of surface protein marker(s), host or pathogen gene(s), or combinations thereof.

Single-cell Quantitation of mRNA and Surface Protein Expression in Simian Immunodeficiency Virus-infected CD4+ T Cells Isolated from Rhesus macaques

Described is a methodology to quantitate the expression of 96 genes and 18 surface proteins by single cells ex vivo, allowing for the identification of differentially expressed genes and proteins in virus-infected cells relative to uninfected cells. We apply the approach to study SIV-infected CD4+ T cells isolated from rhesus macaques.

猕猴免疫缺陷病毒感染 CD4+ T 细胞单细胞定量的 mRNA 和表面蛋白的表达

Single-cell analysis is an important tool for dissecting heterogeneous populations of cells. The identification and isolation of rare cells can be ...

Simultaneous Quantification of Anti-vector and Anti-transgene-Specific CD8+ T Cells Via MHC I Tetramer Staining After Vaccination with a Viral Vector

Upon viral infection, antigen-specific CD8+ cytotoxic T cells (CTLs) arise and contribute to the elimination of infected cells to prevent the spread of pathogens. Therefore, the frequency of antigen-specific CTLs is indicative of the strength of the T cell response against a specific antigen. Such analysis is important in basic immunology, vaccine development, cancer immunobiology and the adaptive immunology. In the vaccine field, the CTL response directed against components of a viral vector co-determines how effective the generation of antigen-specific cells against the antigen of interest (i.e., transgene) is. Antigen-specific CTLs can either be detected by stimulation with specific peptides followed by intracellular cytokine staining or by the direct staining of antigen-specific T cell receptors (TCRs) and analysis by flow cytometry. The first method is rather time-consuming since it requires sacrificing of animals to isolate cells from organs. Also, it requires isolation of blood from small animals which is difficult to perform. The latter method is rather fast, can be easily done with small amounts of blood and is not dependent on specific effector functions, such as cytolytic activity. MHC tetramers are an ideal tool to detect antigen-specific TCRs.
Here, we describe a protocol to simultaneously detect antigen-specific CTLs for the immunodominant peptides of the viral vector VSV-GP (LCMV-GP, VSV-NP) and transgenes (OVA, HPV 16 E7, eGFP) by MHC I tetramer staining and flow cytometry. Staining is possible either directly from blood or from single cell suspensions of organs, such as spleen. Blood or single cell suspensions of organs are incubated with tetramers. After staining with antibodies against CD3 and CD8, antigen-specific CTLs are quantified by flow cytometry. Optionally, antibodies against CD43, CD44, CD62L or others can be included to determine the activation status of antigen-specific CD8+T cells and to discriminate between na&#239;ve and effector cells.

Simultaneous Quantification of Anti-vector and Anti-transgene-Specific CD8+ T Cells Via MHC I Tetramer Staining After Vaccination with a Viral Vector

Here, we present a protocol for the ex vivo qualitative detection of antigen-specific CD8+ T cells. Analysis is possible with single cell suspensions from organs or from small amounts of blood. A broad range of studies require the analysis of cytotoxic T cell responses (vaccination and cancer immunotherapy studies).

用病毒载体接种后, mhc i 四分体染色同时定量抗载体和抗转基因特异性 cd8+ t 细胞

Upon viral infection, antigen-specific CD8+ cytotoxic T cells (CTLs) arise and contribute to the elimination of infected cells to prevent the spread of ...

小鼠肺中抗原特异性 T 细胞的分离和表征

Identification of Rare Antigen-Specific T Cells from Mouse Lungs with Peptide:Major Histocompatibility Complex Tetramers

The identification and characterization of antigen-specific T cells during health and disease remains a key to improving our understanding of immune pathophysiology. The technical challenges of tracking antigen-specific T cell populations within the endogenous T cell repertoire have been greatly advanced by the development of peptide:MHC tetramer reagents. These fluorescently labeled soluble multimers of MHC class I or class II molecules complexed to antigenic peptide epitopes bind directly to T cells with corresponding T cell receptor (TCR) specificity and can, therefore, identify antigen-specific T cell populations in their native state without a requirement for a functional response induced by ex vivo stimulation. For exceedingly rare populations, tetramer-bound T cells can be magnetically enriched to increase the sensitivity and reliability of detection.
As the investigation of tissue-resident T cell immunity deepens, there is a pressing need to identify antigen-specific T cells that traffic to and reside in nonlymphoid tissues. In this protocol, we present a detailed set of instructions for the isolation and characterization of antigen-specific T cells present within mouse lungs. This involves the isolation of T cells from digested lung tissue followed by a general T cell magnetic enrichment step and tetramer staining for flow cytometry analysis and sorting. The steps highlighted in this protocol utilize common techniques and readily available reagents, making it accessible for nearly any researcher engaged in mouse T cell immunology, and are highly adaptable for a variety of downstream analyses of any low frequency antigen-specific T cell population residing within the lungs.

作者聚焦:使用四聚体检测小鼠肺中抗原特异性 T 细胞的优化方案

We provide a detailed protocol for isolating and identifying rare antigen-specific T cell populations in mouse lungs through magnetic bead-based T cell enrichment and peptide:major histocompatibility complex (MHC) tetramers.

用肽:主要组织相容性复合物四聚体鉴定小鼠肺中的稀有抗原特异性 T 细胞

The identification and characterization of antigen-specific T cells during health and disease remains a key to improving our understanding of immune ...

猴免疫缺陷病毒特异性CD8分析

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多色流流式细胞仪分析细胞在恒河猴的免疫应答

T细胞受体在小鼠T细胞的逆转录病毒转导

肽:MHC四聚体为基础的抗原表位特异性的T细胞的富集

可视化抗原特异性CD4 + T细胞的MHC II类四聚四

一种技术，同时可视化病毒特异性CD8 + T细胞和病毒感染的细胞原位

原位MHC-聚丙烯染色和定量分析确定抗原特异性 CD8 T 细胞在组织中的位置、丰度和表型

猕猴免疫缺陷病毒感染 CD4⁺ T 细胞单细胞定量的 mRNA 和表面蛋白的表达

用病毒载体接种后, mhc i 四分体染色同时定量抗载体和抗转基因特异性 cd8⁺ t 细胞

用肽:主要组织相容性复合物四聚体鉴定小鼠肺中的稀有抗原特异性 T 细胞

用肽:主要组织相容性复合物四聚体鉴定小鼠肺中的稀有抗原特异性 T 细胞