我们感谢三宅义子，早矢香Kanaami，奇哈纳藤田，美穗山口，夏子Henmi，和丽大野耐一从庆应义塾大学医学院提供技术援助。这部分工作是由R＆D Systems的支持计划，以加速实际使用的健康研究成果，以及高速公路项目为再生医学的实现提供资金。

1.准备激活人类T细胞<ol><li>收集肝素化的全血从供体通过静脉穿刺10毫升<ol><li>获得捐赠者的知情同意提前静脉穿刺。静脉穿刺必须由合格的，经过培训的人员来完成。 </li><li>处理的血液样本，用无菌设备及以下适当的生物安全准则。 </li></ol></li><li>稀释肝素化的全血用10ml D-PBS中的10毫升（ - ）。 </li><li>将15个毫升聚蔗糖溶液（菲可 - 帕克溢价）到一个新的50毫升锥形管。 </li><li>层在步骤1.2制得到在步骤1.3中所述的Ficoll溶液20毫升血液。使用电吸移管，让血液溶液制备步骤1.2运行慢慢沿管的内壁上。要小心，不要混用血液和聚蔗糖的解决方案。 </li><li>离心机在400×g下在室温30分钟。将离心减速速度"慢"。 注意:离心后，为白色薄层浮现的上部乳白色血浆层和下清晰的Ficoll层之间。这白色的薄薄的一层含有单核细胞。 </li><li>的单核细胞层转移到一个新的50毫升锥形管用1毫升吸移管。要小心，不要包括聚蔗糖的解决方案。 </li><li>添加D-PBS（ - ）与单核细胞，以10毫升的总体积，以及离心机在200×g下5分钟，在室温。 </li><li>弃去上清液。加入10 mL D-PBS的（ - ）对单核细胞，并在离心分离机200×g下5分钟，在室温。 </li><li>弃去上清液，加入1 ml的KBM502培养基向收集的单核细胞，并使用血细胞计数器计数细胞。超过5×10 6单核细胞可以从肝素化的全血与适当的分离用Ficoll 10 ml的获得。 </li><li>制备的抗人CD3抗体溶液以10微克/毫升在D-PBS的浓度（ - ）。抗人CD3抗体溶液添加至6孔板，浸泡冲浪每个王牌孔，孵育菜，在37℃在一个5％CO 2培养箱中至少30分钟。 </li><li>除去从各抗人CD3抗体溶液以及与用D-PBS洗一次（ - ）以接种细胞之前。 </li><li>分别以2.5×10 5个细胞/ cm 2的对抗人CD3抗体包被6孔板中KBM502介质的密度制备步骤1.9 ​​那种子的单核细胞。在5％-CO 2培养箱中3-7天在37℃的无介质改变，直到T细胞达到汇合。 T细胞在此期间都暂停，细胞粘附。 </li></ol> 2.感染人体T细胞SeV载体<ol><li>经过3-7天的培养，收集活化的T细胞，吹打现有的网上平台。它们转移到15毫升锥形管中并离心，在200×g下5分钟，在室温。 </li><li>去除上清，加入1毫升新鲜KBM502网上平台。计数细胞，和板1。5×10 6个细胞（在2ml新鲜培养基KBM502）插入抗CD3抗体包被的6孔板的每个孔中。 </li><li>冰上解冻OCT3 / 4-SeV载体/TSΔF，​​SOX2-的SeV /TSΔF，​​KLF4-的SeV /TSΔF，​​和c-MYC（HNL）-sev /TS15ΔF的SeV的解决方案。 </li><li>添加包含OCT3 / 4-SeV载体/TSΔF，​​SOX2-的SeV /TSΔF，​​KLF4-的SeV /TSΔF，​​和c-MYC（HNL）SeV的溶液-sev /TS15ΔF单独的井，每于感染复数（MOI） 10.孵育在37℃下在5％-CO 2培养箱中另外24小时。 </li></ol> 3.从人类T细胞SeV载体<ol><li> 24小时感染后，收集感染的细胞用吸管。如果有粘附细胞，他们可以很容易被拆卸吹打他们反复向上和向下。它们转移到15毫升锥形管中，并离心分离，在200×g下5分钟，在室温。 </li><li>删除包含SeV载体上清液，加2ml新鲜KBM502介质。 Replate细胞EAC小时井。在5％-CO 2培养箱在37℃下另外24小时。 </li></ol>在基底膜层4.重新设定种子细胞<ol><li>准备通过解冻基质凝胶基底膜基质溶液（请参阅材料清单用于本研究中使用的特定的品牌），在4℃和在10毫升的DMEM / F12培养基中溶解0.2毫升 注:基质胶（请参阅材料清单用于本研究中使用的特定的品牌）需要解冻O / N在4℃下被完全解冻。保持它在冰上使用前至。 </li><li>在RT种子细胞之前，每盘盘5毫升基底膜基质溶液为100毫米的菜肴，并留下了至少30分钟。都需要一个实验的至少两个100-mm培养皿中。 </li><li>收集的SeV感染的细胞通过移液，将它们在室温下转移到15毫升锥形管中，并离心分离，在200×g下5分钟。 </li><li>去除上清，加入1毫升新鲜KBM502网上平台。伯爵CE数量LLS使用血细胞计数器，删除在步骤4.2和板制备100-mm培养皿中的基底膜基质溶液1×10 5和1×10 6个细胞（在10ml新鲜mTeSR培养基）上的100毫米基底膜基质涂覆菜肴。最后，使用板，其菌落容易上手。 </li><li>孵育在5％-CO 2培养箱O / N的菜在37℃。 </li><li>介质更改至10ml充实mTeSR培养基隔日1次。 注意:在感染后约20-30天，菌落可以非常类似于胚胎干细胞（ESC）将出现。 </li></ol> 5.展开T细胞来源的iPS细胞<ol><li>准备通过解冻基质凝胶基底膜基质溶液（请参阅材料清单用于本研究中使用的特定的品牌），在4℃和在10毫升的DMEM / F12培养基中溶解0.2毫升</li><li>板1 ml的在6孔板每孔基底膜基质溶液中，并在室温离开在采摘菌落前至少30分钟。 </li><li>填的96孔平板与20μlmTeSR培养基中每孔。 </li><li>选择像用20微升移液管的体视显微镜下，胚胎干细胞的殖民地。 注意:胚胎干细胞和iPS细胞的集落是圆形和扁平，如图1B所示 。 </li><li>传输所选的菌落放入96孔板在步骤5.3充满mTeSR培养基。 </li><li>加入200μlmTeSR培养基到每个孔中，并仔细吸取上下打破菌落成小团块用200μl移液管的立体显微镜下。取下充分的准备基底膜基质解决方案5.2，并把每个菌落到基底膜基质包被6孔板2毫升mTeSR培养基中的一个孔，每孔。 </li><li>介质更改〜2毫升充实mTeSR培养基隔日1次。 </li></ol> 6.保持T细胞来源的iPS细胞 T细胞来源的iPS细胞可以保持并用作为人类的iPSC和人ESC相同的技术存储。一旦IPSC的殖民地长大，重复同样的程序扩展成更大的菜肴。 <ol><li>更改mTeSR培养基每1-2天。 </li><li>当菌落变得汇合每5-7天，通过用解离溶液用于人类的iPSC和根据制造商的说明人ESC细胞。 </li></ol>

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作者有没有竞争或利益冲突的披露。

We describe a protocol for generating iPSCs from human peripheral T cells in serum-free and feeder-free conditions using a combination of matrigel, mTeSR medium, and SeV vectors. For clinical applications of iPSCs, it is important to have a protocol for stably generating iPSCs and a less-invasive method for cell sampling. Although generating iPSCs with the combination of matrigel and mTeSR medium showed lower reprogramming efficiency than that with knockout serum replacement (KSR) medium and feeder-cells, this combination achieves stable generation of iPSCs from donors16. Stable iPSC generation and less-invasive cell sampling has the advantage of being able to increase the number of donors for iPSC generation. 
SeV vectors, a minus-strand RNA virus, is not integrated into the host genome. Therefore the risks of tumorigenesis can be avoided at the step of reprogramming factor induction20-24. Additionally, the feeder-free conditions, which use a combination of defined culture medium and matrigel instead of a feeder layer, make it possible to minimize the potential risks of exposure to unknown exogenous factors. The fusion of these techniques provides a less invasive and safer iPSC technology for regenerative medicine16.
Important steps in this protocol are the step of activating human T cells (Step 1) and infecting them with SeV vectors (Step 2). When no ESC-like colony is obtained in the culture dish at an optimal time after SeV infection, the following should be considered. First, the confluency of the mononuclear cells before T cell activation may not be appropriate because optimal activation of T cells is critical for SeV infection25,26. Too high a density of mononuclear cells leads to cell death, interfering with the proper activation of T cells. Too low a density of mononuclear cells also disturbs the proper activation and proliferation of T cells. Therefore, the confluency of mononuclear cells should be checked and adjusted accordingly. Second, the dosage of SeV vectors may not be sufficient. The induction efficiency of iPSC colonies depends on the dosage of the virus6. If no ESC-like colony is observed after SeV infection, the option of increasing the virus dosage up to an MOI of 15-20 should be considered. If signs of iPSC colony differentiation are observed, the frequency at which medium is changed may be increased up to every other day, or to every day when colonies are larger. 
The limitation in this protocol consists of this method not being virus free. Although SeV for cell reprogramming is commercially available with ease, users need to prepare equipment according to the appropriate biosafety level. As another method for generating integration-free iPSCs, episomal vectors have been used until now27-29. Although episomal vectors can be used with equipment with a lower level of biosafety, episomal vectors might insert into the host genome at extremely low rates. Therefore, additional checks are required to confirm the disappearance of transgenes, as when using SeV.
There is another limitation in that this technique is not absolutely free from animal-derived products. Some substrates, such as matrigel, anti-CD3 mAb, dissociation solution and SeV solution are derived from animal products and are therefore associated with a risk of transferring xenogeneic pathogens. However, the reduction of animal-derived substrates in the culture system is meaningful for the clinical application of iPSC technology due to the lower risk.

iPS细胞引起了极大关注，因为细胞在再生医学1-3一个突破性的来源。迄今为止，用于产生iPSCs的多样的方法已被报道4,5。其中，从人T细胞产生iPSCs的已经因为细胞采样6-8的较少创伤的方法的特别的兴趣。此外，从iPSCs的T细胞衍生的含有T细胞受体（TCR）基因重排，因而抗原特异性T细胞9,10的来源。因此，产生的T细胞衍生的iPS细胞安全是正在进行再生医学有用。 此方法是基于减少不可预知的致病性的风险的概念。为iPS细胞的临床应用安全是很重要的，以减少病原体11暴露的风险。先前在多能干细胞的许多培养系统，胎牛血清和饲养细胞已被用来作为基本试剂第 12条。然而，去除这两个从培养系统试剂是优选的iPSC产生，以减少不可预知的致病性的危险。 此外，此方法具有避免从患者和饲养细胞的制备费力侵袭性细胞采样的优点。因为T细胞衍生的iPSCs已经被成功地用于在疾病研究13,14，这种方法也适用和有益的，从患者产生疾病特异性的iPSC。 间T细胞重新编程的方法，使用仙台病毒（SeV载体）载体作为基因载体是能够产生iPSCs的高效率7,16的方法。此外，由于SeV载体是一个单链RNA病毒，并且不需要的DNA相对于复制，其在的iPSC代使用避免断宿主基因组17-19。因此，我们已经建立的方案，用于从人外周血T细胞的iPSC在无血清的FRee值，并使用基质胶，mTeSR培养基的组合无饲养条件下，和SeV载体。

<table border="0">
	<tbody>
		<tr>
			<td>Ficoll-Paque PREMIUM</td>
			<td>GE Healthcare</td>
			<td>17-5442-02</td>
			<td></td>
		</tr>
		<tr>
			<td>Purified NA/LE mouse anti-human CD3</td>
			<td>BD Pharmingen</td>
			<td>555336</td>
			<td></td>
		</tr>
		<tr>
			<td>KBM502 medium</td>
			<td>KOHJIN BIO</td>
			<td>16025020</td>
			<td>Warm in 37 &#8451; water bath before use</td>
		</tr>
		<tr>
			<td>Bovine albumin fraction V solution</td>
			<td>Gibco</td>
			<td>15260-037</td>
			<td></td>
		</tr>
		<tr>
			<td>BD Matrigel Matrix Growth Factor Reduced</td>
			<td>BD Biosciences</td>
			<td>354230</td>
			<td>Thaw completely at 4&#8451; overnight and dilute it 50 times with Dulbecco&#39;s Modified Eagle&#39;s Medium before coating culture dishes</td>
		</tr>
		<tr>
			<td>mTeSR1 medium kit</td>
			<td>STEM CELL</td>
			<td>5850</td>
			<td>Warm at room temperature before use</td>
		</tr>
		<tr>
			<td>Dissociation Solution</td>
			<td>ReproCELL</td>
			<td>RCHETP002</td>
			<td></td>
		</tr>
		<tr>
			<td>D-PBS(&#8211;)</td>
			<td>Wako</td>
			<td>045-29795</td>
			<td></td>
		</tr>
		<tr>
			<td>SeV Vector kit CytoTune-iPS ver.1.0</td>
			<td>DNAVEC</td>
			<td>DV-0303c</td>
			<td>Thaw on ice before use</td>
		</tr>
		<tr>
			<td>100-mm tissue culture dish</td>
			<td>Falcon</td>
			<td>353003</td>
			<td></td>
		</tr>
		<tr>
			<td>96-well tissue culture plate</td>
			<td>Falcon</td>
			<td>353078</td>
			<td></td>
		</tr>
		<tr>
			<td>6-well tissue culture plate</td>
			<td>Falcon</td>
			<td>353046</td>
			<td></td>
		</tr>
		<tr>
			<td>15ml Centrifuge Tube</td>
			<td>Greiner Bio-One&#160;</td>
			<td>188271</td>
			<td></td>
		</tr>
		<tr>
			<td>50ml Centrifuge Tube</td>
			<td>Greiner Bio-One&#160;</td>
			<td>227261</td>
			<td></td>
		</tr>
	</tbody>
</table>

generation of induced pluripotent stem cells from human peripheral t cells using sendai virus in feeder-free conditions

最近，iPS细胞已经引起关注，因为细胞再生疗法的新来源。尽管用于产生iPSCs的初始方法依赖于通过侵入性活组织检查和转基因的逆转录病毒基因组的插入得到的皮肤成纤维细胞，已经出现了许多努力来避免这些缺点。人外周血T细胞是唯一的小区源用于产生iPSCs的。从T细胞衍生的iPSC含有T细胞受体（TCR）基因的重排，并且抗原特异性T细胞的来源。此外，在基因组中的T细胞受体的重排有标记单个细胞系和移植的和供体细胞区分的可能性。为iPS细胞的安全的临床应用中，它以最小化暴露新产生iPSCs的有害试剂的风险是重要的。虽然胎牛血清和饲养细胞已为多能干细胞培养必需的，最好是从培养系统中删除他们减少风险不可预知的致病性。为了解决这个问题，我们已经建立了一个协议，用于使用仙台病毒，以减少暴露的iPSC未定义的病原体的风险产生于人类外周T细胞的iPS细胞。虽然处理仙台病毒要求设备具备相应的生物安全水平，仙台病毒感染活化的T细胞无基因组插入，但效率很高。在这个协议中，我们展示了使用活化的T细胞培养和仙台病毒的组合从人外周血T细胞在无饲养条件iPS细胞的产生。

<html>使用此协议，用户能够生成从人外周血T细胞的iPSC稳定。 IPSC的一代，从T细胞的SeV和基底膜呈约0.002％ -细胞重编程的几个段落后，均未检出几个捐助情况和SeV载体的效率为0.005％，16 图1A显示源细胞的协议产生吨示意图iPS细胞使用基质胶和mTeSR中等无饲养条件。感染的SeV后约20至30天，iPSC的菌落通过菌落ESC样形态（图1B）识别。免疫荧光染色显示的典型的多能细胞标记物的表达（NANOG，OCT3 / 4，SSEA4，TRA-1-60，和TRA-1-81）中的T细胞来源的iPS细胞无饲养条件（图1C）下产生的。 "WIDTH ="700"/&gt; 图1（A）:无饲养条件本研究下的协议重新编程性T细胞的示意图。 （B）:在无饲养条件下采血后27天一个典型的ESC样IPSC的殖民地。 （℃）:ALP染色和免疫荧光染色为多能性和表面标记（NANOG，OCT3 / 4，SSEA4，TRA-1-60，和TRA-1-81）中的T细胞来源的iPS细胞无饲养条件下产生的。 <a href="https://www.jove.com/files/ftp_upload/53225/53225fig1highres.jpg" target="_blank">请点击此处查看该图的放大版本。</a>

Watch this Scientific Journal Video about Generation of Induced Pluripotent Stem Cells from Human Peripheral T Cells Using Sendai Virus in Feeder-free Conditions at JoVE.com

Generation of Induced Pluripotent Stem Cells from Human Peripheral T Cells Using Sendai Virus in Feeder-free Conditions

This protocol describes how to generate induced pluripotent stem cells (iPSCs) from human peripheral T cells in feeder-free conditions using a combination of matrigel and Sendai virus vectors containing reprogramming factors.

从人外周T细胞无饲养条件下，使用仙台病毒诱导多能干细胞的生成

Recently, iPSCs have attracted attention as a new source of cells for regenerative therapies. Although the initial method for generating iPSCs relied on ...

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Research

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Developmental Biology

11.9K 次观看.  Keio University School of Medicine. This protocol describes how to generate induced pluripotent stem cells (iPSCs) from human peripheral T cells in feeder-free conditions using a combination of matrigel and Sendai virus vectors containing reprogramming factors.

视频: Generation of Induced Pluripotent Stem Cells from Human Peripheral T Cells Using Sendai Virus in Feeder-free Conditions

Generation of Integration-free Human Induced Pluripotent Stem Cells Using Hair-derived Keratinocytes

Recent advances in reprogramming allow us to turn somatic cells into human induced pluripotent stem cells (hiPSCs). Disease modeling using patient-specific hiPSCs allows the study of the underlying mechanism for pathogenesis, also providing a platform for the development of in vitro drug screening and gene therapy to improve treatment options. The promising potential of hiPSCs for regenerative medicine is also evident from the increasing number of publications (>7000) on iPSCs in recent years. Various cell types from distinct lineages have been successfully used for hiPSC generation, including skin fibroblasts, hematopoietic cells and epidermal keratinocytes. While skin biopsies and blood collection are routinely performed in many labs as a source of somatic cells for the generation of hiPSCs, the collection and subsequent derivation of hair keratinocytes are less commonly used. Hair-derived keratinocytes represent a non-invasive approach to obtain cell samples from patients. Here we outline a simple non-invasive method for the derivation of keratinocytes from plucked hair. We also provide instructions for maintenance of keratinocytes and subsequent reprogramming to generate integration-free hiPSC using episomal vectors.

This manuscript provides a step-by-step procedure for the derivation and maintenance of human keratinocytes from plucked hair and subsequent generation of integration-free human induced pluripotent stem cells (hiPSCs) by episomal vectors.

集成的无人类诱导多能干细胞的生成方法头发衍生角质形成细胞

Recent advances in reprogramming allow us to turn somatic cells into human induced pluripotent stem cells (hiPSCs). Disease modeling using ...

科研

发育生物学

Feeder-free Derivation of Melanocytes from Human Pluripotent Stem Cells

Human pluripotent stem cells (hPSCs) represent a platform to study human development in vitro under both normal and disease conditions. Researchers can direct the differentiation of hPSCs into the cell type of interest by manipulating the culture conditions to recapitulate signals seen during development. One such cell type is the melanocyte, a pigment-producing cell of neural crest (NC) origin responsible for protecting the skin against UV irradiation. This protocol presents an extension of a currently available in vitro Neural Crest differentiation protocol from hPSCs to further differentiate NC into fully pigmented melanocytes. Melanocyte precursors can be enriched from the Neural Crest protocol via a timed exposure to activators of WNT, BMP, and EDN3 signaling under dual-SMAD-inhibition conditions. The resultant melanocyte precursors are then purified and matured into fully pigmented melanocytes by culture in a selective medium. The resultant melanocytes are fully pigmented and stain appropriately for proteins characteristic of mature melanocytes.

This work describes an in vitro differentiation protocol to produce pigmented, mature melanocytes from human pluripotent stem cells via a neural crest and melanoblast intermediate stage using a feeder-free, 25 day protocol.

从人多能干细胞的黑素细胞的无饲养推导

Human pluripotent stem cells (hPSCs) represent a platform to study human development in vitro under both normal and disease conditions. Researchers can ...

Generation of Induced Pluripotent Stem Cells from Human Melanoma Tumor-infiltrating Lymphocytes

Adoptive transfer of ex vivo expanded autologous tumor-infiltrating lymphocytes (TILs) can mediate durable and complete responses in significant subsets of patients with metastatic melanoma. Major obstacles of this approach are the reduced viability of transferred T cells, caused by telomere shortening, and the limited number of TILs obtained from patients. Less-differentiated T cells with long telomeres would be an ideal T cell subset for adoptive T cell therapy;however, generating large numbers of these less-differentiated T cells is problematic. This limitation of adoptive T cell therapy can be theoretically overcome by using induced pluripotent stem cells (iPSCs) that self-renew, maintain pluripotency, have elongated telomeres, and provide an unlimited source of autologous T cells for immunotherapy. Here, we present a protocol to generate iPSCs using Sendai virus vectors for the transduction of reprogramming factors into TILs. This protocol generates fully reprogrammed, vector-free clones. These TIL-derived iPSCs might be able to generate less-differentiated patient- and tumor-specific T cells for adoptive T cell therapy.

The goal of this protocol is to show the protocol for reprogramming melanoma tumor-infiltrating lymphocytes into induced pluripotent stem cells.

从人黑色素瘤肿瘤浸润淋巴细胞诱导多能干细胞的产生

Adoptive transfer of ex vivo expanded autologous tumor-infiltrating lymphocytes (TILs) can mediate durable and complete responses in significant subsets ...

Induced Pluripotent Stem Cell Generation from Blood Cells Using Sendai Virus and Centrifugation

The recent development of human induced pluripotent stem cells (hiPSCs) proved that mature somatic cells can return to an undifferentiated, pluripotent state. Now, reprogramming is done with various types of adult somatic cells: keratinocytes, urine cells, fibroblasts, etc. Early experiments were usually done with dermal fibroblasts. However, this required an invasive surgical procedure to obtain fibroblasts from the patients. Therefore, suspension cells, such as blood and urine cells, were considered ideal for reprogramming because of the convenience of obtaining the primary cells. Here, we report an efficient protocol for iPSC generation from peripheral blood mononuclear cells (PBMCs). By plating the transduced PBMCs serially to a new, matrix-coated plate using centrifugation, this protocol can easily provide iPSC colonies. This method is also applicable to umbilical cord blood mononuclear cells (CBMCs). This study presents a simple and efficient protocol for the reprogramming of PBMCs and CBMCs.

We propose a protocol for reprogramming peripheral blood mononuclear cells (PBMCs) into induced pluripotent stem cells (iPSCs). By plating the transduced blood cells onto matrix-coated plates with centrifugation, iPSCs are successfully induced from floating cells. This technique suggests a simple and effective reprogramming protocol for cells such as PBMCs and CBMCs.

从血细胞使用仙台病毒和离心诱导多能干细胞代

The recent development of human induced pluripotent stem cells (hiPSCs) proved that mature somatic cells can return to an undifferentiated, pluripotent ...

Generation of Integration-free Induced Pluripotent Stem Cells from Human Peripheral Blood Mononuclear Cells Using Episomal Vectors

Induced Pluripotent Stem Cells (iPSCs) hold great promise for disease modeling and regenerative therapies. We previously reported the use of Episomal Vectors (EV) to generate integration-free iPSCs from peripheral blood mononuclear cells (PB MNCs). The episomal vectors used are DNA plasmids incorporated with oriP and EBNA1 elements from the Epstein-Barr (EB) virus, which&#160;allow for replication and long-term retainment of plasmids in mammalian cells, respectively. With further optimization, thousands of iPSC colonies can be obtained from 1 mL of peripheral blood. Two critical factors for achieving high reprogramming efficiencies&#160;are: 1) the use of a 2A &#34;self-cleavage&#34; peptide to link OCT4 and SOX2, thus achieving equimolar expression of the two factors; 2) the use of two vectors to express MYC and KLF4 individually. Here we describe a step-by-step protocol for generating integration-free iPSCs from adult peripheral blood samples. The generated iPSCs are integration-free as residual episomal plasmids are undetectable after five passages. Although the reprogramming efficiency is comparable to that of Sendai Virus (SV) vectors, EV plasmids are considerably more economical than the commercially available SV vectors. This affordable EV reprogramming system holds potential for clinical applications in regenerative medicine and provides an approach for the direct reprogramming of PB MNCs to integration-free mesenchymal stem cells, neural stem cells, etc.

This protocol describes a detailed method for efficient generation of integration-free iPSCs from human adult peripheral blood cells. With the use of four oriP/EBNA-based episomal vectors to express the reprogramming factors, KLF4, MYC, BCL-XL, or OCT4 and SOX2, thousands of iPSC colonies can be obtained from 1 mL of peripheral blood.

从人体外周血单个核细胞融合，无诱导多能干细胞的生成方法游离型载体

Induced Pluripotent Stem Cells (iPSCs) hold great promise for disease modeling and regenerative therapies. We previously reported the use of Episomal ...

Defined and Scalable Generation of Hepatocyte-like Cells from Human Pluripotent Stem Cells

Human pluripotent stem cells (hPSCs) possess great value for biomedical research. hPSCs can be scaled and differentiated to all cell types found in the human body. The differentiation of hPSCs to human hepatocyte-like cells (HLCs) has been extensively studied, and efficient differentiation protocols have been established. The combination of extracellular matrix and biological stimuli, including growth factors, cytokines, and small molecules, have made it possible to generate HLCs that resemble primary human hepatocytes. However, the majority of procedures still employ undefined components, giving rise to batch-to-batch variation. This serves as a significant barrier to the application of the technology. To tackle this issue, we developed a defined system for hepatocyte differentiation using human recombinant laminins as extracellular matrices in combination with a serum-free differentiation process. Highly efficient hepatocyte specification was achieved, with demonstrated improvements in both HLC function and phenotype. Importantly, this system is easy to scale up using research and GMP-grade hPSC lines&#160;promising advances in cell-based modelling and therapies.

The method presented here describes a scalable and good manufacturing practice (GMP)-ready differentiation system to generate human hepatocyte-like cells from pluripotent stem cells. It serves as a cost-effective and standardized system to generate human hepatocyte-like cells for basic and applied human liver research.

界定和由人多能干细胞的肝细胞样细胞的可扩展代

Human pluripotent stem cells (hPSCs) possess great value for biomedical research. hPSCs can be scaled and differentiated to all cell types found in the ...

Differentiating Chondrocytes from Peripheral Blood-derived Human Induced Pluripotent Stem Cells

In this study, we used peripheral blood cells (PBCs) as seed cells to produce chondrocytes via induced pluripotent stem cells (iPSCs) in an integration-free method. Following embryoid body (EB) formation and fibroblastic cell expansion, the iPSCs are induced for chondrogenic differentiation for 21 days under serum-free and xeno-free conditions. After chondrocyte induction, the phenotypes of the cells are evaluated by morphological, immunohistochemical, and biochemical analyses, as well as by the quantitative real-time PCR examination of chondrogenic differentiation markers. The chondrogenic pellets show positive alcian blue and toluidine blue staining. The immunohistochemistry of collagen II and X staining is also positive. The sulfated glycosaminoglycan (sGAG) content and the chondrogenic differentiation markers COLLAGEN 2 (COL2), COLLAGEN 10 (COL10), SOX9, and AGGRECAN are significantly upregulated in chondrogenic pellets compared to hiPSCs and fibroblastic cells. These results suggest that PBCs can be used as seed cells to generate iPSCs for cartilage repair, which is patient-specific and cost-effective.

We present a protocol to generate a chondrogenic lineage from human peripheral blood (PB) via induced pluripotent stem cells (iPSCs) using an integration-free method, which includes embryoid body (EB) formation, fibroblastic cells expansion, and chondrogenic induction.

分化软骨细胞与外周血源性人诱导多能干细胞

In this study, we used peripheral blood cells (PBCs) as seed cells to produce chondrocytes via induced pluripotent stem cells (iPSCs) in an ...

Generation of Standardized and Reproducible Forebrain-type Cerebral Organoids from Human Induced Pluripotent Stem Cells

The human cortex is highly expanded and exhibits a complex structure with specific functional areas, providing higher brain function, such as cognition. Efforts to study human cerebral cortex development have been limited by the availability of model systems. Translating results from rodent studies to the human system is restricted by species differences and studies on human primary tissues are hampered by a lack of tissue availability as well as ethical concerns. Recent development in human pluripotent stem cell (PSC) technology include the generation of three-dimensional (3D) self-organizing organotypic culture systems, which mimic to a certain extent human-specific brain development in vitro. Currently, various protocols are available for the generation of either whole brain or brain-region specific organoids. The method for the generation of homogeneous and reproducible forebrain-type organoids from induced PSC (iPSC), which we previously established and describe here, combines the intrinsic ability of PSC to self-organize with guided differentiation towards the anterior neuroectodermal lineage and matrix embedding to support the formation of a continuous neuroepithelium. More specifically, this protocol involves: (1) the generation of iPSC aggregates, including the conversion of iPSC colonies to a confluent monolayer culture; (2) the induction of anterior neuroectoderm; (3) the embedding of neuroectodermal aggregates in a matrix scaffold; (4) the generation of forebrain-type organoids from neuroectodermal aggregates; and (5) the fixation and validation of forebrain-type organoids. As such, this protocol provides an easily applicable system for the generation of standardized and reproducible iPSC-derived cortical tissue structures in vitro.

Cerebral organoids represent a new model system to investigate early human brain development in vitro. This article provides the detailed methodology to efficiently generate homogeneous dorsal forebrain-type organoids from human induced pluripotent stem cells including critical characterization and validation steps.

人诱导多能干细胞的前脑型脑 Organoids 标准化和可再生性的生成

The human cortex is highly expanded and exhibits a complex structure with specific functional areas, providing higher brain function, such as cognition. ...

Generation of 3D Skin Organoid from Cord Blood-derived Induced Pluripotent Stem Cells

The skin is the body&#8217;s largest organ and has many functions. The skin acts as a physical barrier and protector of the body and regulates bodily functions. Biomimetics is the imitation of the models, systems, and elements of nature for the purpose of solving complex human problems1. Skin biomimetics is a useful tool for in vitro disease research and in vivo regenerative medicine. Human induced pluripotent stem cells (iPSCs) have the characteristic of unlimited proliferation and the ability of differentiation to three germ layers. Human iPSCs are generated from various primary cells, such as blood cells, keratinocytes, fibroblasts, and more. Among them, cord blood mononuclear cells (CBMCs) have emerged as an alternative cell source from the perspective of allogeneic regenerative medicine. CBMCs are useful in regenerative medicine because human leukocyte antigen (HLA) typing is essential to the cell banking system. We provide a method for the differentiation of CBMC-iPSCs into keratinocytes and fibroblasts and for generation of a 3D skin organoid. CBMC-iPSC-derived keratinocytes and fibroblasts have characteristics similar to a primary cell line. The 3D skin organoids are generated by overlaying an epidermal layer onto a dermal layer. By transplanting this 3D skin organoid, a humanized mice model is generated. This study shows that a 3D human iPSC-derived skin organoid may be a novel, alternative tool for dermatologic research in vitro and in vivo.

We propose a protocol that shows how to differentiate induced pluripotent stem cell-derived keratinocytes and fibroblasts and generate a 3D skin organoid, using these keratinocytes and fibroblasts. This protocol contains an additional step of generating a humanized mice model. The technique presented here will improve dermatologic research.

从脐带血源性多能干细胞中提取三维皮肤有机细胞

The skin is the body&#8217;s largest organ and has many functions. The skin acts as a physical barrier and protector of the body and regulates bodily ...

In Vitro Generation of Somite Derivatives from Human Induced Pluripotent Stem Cells

In response to signals such as WNTs, bone morphogenetic proteins (BMPs), and sonic hedgehog (SHH) secreted from surrounding tissues, somites (SMs) give rise to multiple cell types, including the myotome (MYO), sclerotome (SCL), dermatome (D), and syndetome (SYN), which in turn develop into skeletal muscle, axial skeleton, dorsal dermis, and axial tendon/ligament, respectively. Therefore, the generation of SMs and their derivatives from human induced pluripotent stem cells (iPSCs) is critical to obtain pluripotent stem cells (PSCs) for application in regenerative medicine and for disease research in the field of orthopedic surgery. Although the induction protocols for MYO and SCL from PSCs have been previously reported by several researchers, no study has yet demonstrated the induction of SYN and D from iPSCs. Therefore, efficient induction of fully competent SMs remains a major challenge. Here, we recapitulate human SM patterning with human iPSCs in vitro by mimicking the signaling environment during chick/mouse SM development, and report on methods of systematic induction of SM derivatives (MYO, SCL, D, and SYN) from human iPSCs under chemically defined conditions through the presomitic mesoderm (PSM) and SM states. Knowledge regarding chick/mouse&#160;SM development was successfully applied to the induction of SMs with human iPSCs. This method could be a novel tool for studying human somitogenesis and patterning without the use of embryos and for cell-based therapy and disease modeling.

We present here a protocol for the differentiation of human induced pluripotent stem cells into each somite derivative (myotome, sclerotome, dermatome, and syndetome) in chemically defined conditions, which has applications in future disease modeling and cell-based therapies in orthopedic surgery.

人诱导多能干细胞体外生成体细胞衍生物的研究

In response to signals such as WNTs, bone morphogenetic proteins (BMPs), and sonic hedgehog (SHH) secreted from surrounding tissues, somites (SMs) give ...