The authors have no conflicts of interest to disclose.

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The study is funded by NIH intramural funds.

ويرد بروتوكول مفصلة لتوليد مباشرة الخلايا الجذعية العصبية من الخلايا الاصلية المكونة للدم الطرفية. مقارنة مع الخلايا الليفية، الدم المحيطي البشري هو أكثر سهولة. باستخدام بروتوكول المقدمة، أكثر من 1 × 10 5 الخلايا المكونة لل...

في المختبر وقد استخدمت الثقافات العصبية كأداة أساسية للدراسات الأمراض العصبية. الحيوان الأساسي (ومعظمهم من القوارض) الثقافات العصبية 1 و 2 و خطوط الخلايا العصبية البشرية المستمدة من الاورام الدبقية أو الأورام الأخرى هي الأكثر استخداما في مثل هذه الدراسات. ومع ذلك، فقد تم الاعتراف بأن هناك اختلافات كبيرة بين القوارض والخلايا البشرية. لا يمكن أن تترجم العديد من النتائج على أساس القوارض للإنسان. وعلاوة على ذلك، مع التطورات السريعة في تحليل المعلومات الجينومية الجماعية والتحرير الجين السهل نسبيا وكله تسلسل الجينوم، فإن الاتجاه هو المزيد والمزيد من استعداداتها لاكتشاف المرض الجينات معرضة وترسيم وظائفهم وأدوارهم في أمراض معينة، مما يجعل الخلايا العصبية البشرية قليلة وقد خطوط الخلايا استخدام تقتصر فقط. من الناحية النظرية، والثقافات العصبية الأولية الإنسان المستمدة من عينات من الجهاز العصبي المريض هي أفضل خيار إلا أنه من المستحيل للحصول عليها. ميث بالتالي البديلالمواد المستنفدة للأوزون ضرورية. في السنوات الأخيرة، تم ملاحقة بعض المناهج، مع اثنين من كونها الأكثر تمييزها. بعد تطوير هذه التقنية لتوليد الخلايا الجذعية المحفزة التي يسببها (IPSC) باستخدام الماوس والخلايا الجسدية الإنسان 3، 4، والخلايا العصبية يمكن أن يكون أبعد متباينة منها 5-7. ومع ذلك، وتوليد وتوصيف IPSC يطالب كثيفة العمالة، والتقنيات، والمدخلات الوقت، وأحيانا حتى باهظة. بعد فترة وجيزة، تم تطوير نهج آخر لتحويل الخلايا العصبية مباشرة من الخلايا الجسدية 8، 9. وبما أن الخلايا العصبية الناتجة غير التكاثري، فإنه يحد تطبيقه في الدراسات المكثفة وفحص المخدرات، الأمر الذي يتطلب كمية كبيرة من الخلايا. للاستفادة من التقنيات على حد سواء، الاشتقاق المباشر للالجذعية العصبية / الخلايا الاصلية من الخلايا الجسدية تم استكشافها من قبل عدة مجموعات 10-12، التي تتجاوز عملية شاقة من الجيل IPSC وتوصيف ولكن لا يزال. نحن نتعاملقصر عدد محترم من الخلايا الجذعية العصبية للتمايز العصبي لاحق. لقد أظهرنا سابقا أنه بعد إدخال عوامل النسخ ياماناكا في الخلايا الاصلية المكونة للدم والخلايا الجذعية العصبية يمكن أن تتولد مباشرة باستخدام خلية العصبية السلف اختيار المتوسطة 13. هنا، ونحن التقرير الطريقة بالتفصيل.

<table border="0" cellpadding="0" cellspacing="0" width="584">
	<tbody>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">Material List</td>
			<td style="width:171px;"></td>
			<td style="width:135px;"></td>
			<td style="width:72px;"></td>
		</tr>
		<tr height="41">
			<td height="41" style="height:41px;width:208px;">Name</td>
			<td style="width:171px;">Company</td>
			<td style="width:135px;">Catalog Number</td>
			<td style="width:72px;">Comments</td>
		</tr>
		<tr height="41">
			<td height="41" style="height:41px;width:208px;">Lymphocyte Separation Medium</td>
			<td style="width:171px;">Lonza</td>
			<td style="width:135px;">17-829E</td>
			<td style="width:72px;">1 X</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">SepMate</td>
			<td style="width:171px;">Stemcell Technologies</td>
			<td align="right" style="width:135px;">15415</td>
			<td style="width:72px;">15 mL</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">Human Serum</td>
			<td style="width:171px;">Invitrogen</td>
			<td style="width:135px;">34005-100</td>
			<td style="width:72px;"></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">Antibiotics</td>
			<td style="width:171px;">Gibco</td>
			<td style="width:135px;">15240-062</td>
			<td align="right" style="width:72px;">1%</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">CD34 MultiSort Kit</td>
			<td style="width:171px;">Miltenyi Biotec</td>
			<td style="width:135px;">130-056-701</td>
			<td style="width:72px;"></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">EDTA</td>
			<td style="width:171px;">Cellgro</td>
			<td style="width:135px;">46-034-Cl&#160;</td>
			<td style="width:72px;">2mM</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">MACS LS Column</td>
			<td style="width:171px;">Miltenyi Biotec</td>
			<td style="width:135px;">130-042-401</td>
			<td style="width:72px;"></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">StemSpan SFEM Medium</td>
			<td style="width:171px;">Stemcell Technologies</td>
			<td align="right" style="width:135px;">9650</td>
			<td style="width:72px;">1X</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">IMDM</td>
			<td style="width:171px;">Quality Biologicals</td>
			<td style="width:135px;">112-035-101</td>
			<td style="width:72px;">1X</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">TPO</td>
			<td style="width:171px;">Peprotech</td>
			<td style="width:135px;">300-18</td>
			<td style="width:72px;">100 ng/mL</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">Flt-3</td>
			<td style="width:171px;">Peprotech</td>
			<td style="width:135px;">300-19</td>
			<td style="width:72px;">100 ng/mL</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">SCF</td>
			<td style="width:171px;">Peprotech</td>
			<td style="width:135px;">300-07</td>
			<td style="width:72px;">100 ng/mL</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">IL-6</td>
			<td style="width:171px;">Peprotech</td>
			<td style="width:135px;">200-06</td>
			<td style="width:72px;">20 ng/mL</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">IL-7&#160;</td>
			<td style="width:171px;">Peprotech</td>
			<td style="width:135px;">200-07</td>
			<td style="width:72px;">20 ng/mL</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">IPS Sendai Reprogramming Kit</td>
			<td style="width:171px;">Life technologies</td>
			<td style="width:135px;">A1378001</td>
			<td style="width:72px;"></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">Cell scraper</td>
			<td style="width:171px;">Sarstedt</td>
			<td align="right" style="width:135px;">83.183</td>
			<td style="width:72px;"></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">DMSO</td>
			<td style="width:171px;">Sigma</td>
			<td style="width:135px;">D2650</td>
			<td style="width:72px;"></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">CryoTube vials</td>
			<td style="width:171px;">Thermo</td>
			<td align="right" style="width:135px;">368632</td>
			<td style="width:72px;"></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">Mr. Frosty container</td>
			<td style="width:171px;">Thermo</td>
			<td style="width:135px;">5100-0001</td>
			<td style="width:72px;"></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">DMEM/F12</td>
			<td style="width:171px;">Life technologies</td>
			<td style="width:135px;">12400-024</td>
			<td style="width:72px;">1X</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">N2 supplement</td>
			<td style="width:171px;">Life technologies</td>
			<td style="width:135px;">17502-048</td>
			<td style="width:72px;">1X</td>
		</tr>
		<tr height="41">
			<td height="41" style="height:41px;width:208px;">Bovine serum albumin</td>
			<td style="width:171px;">Sigma</td>
			<td style="width:135px;">A2934</td>
			<td style="width:72px;">0.1% (w/v)</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">bFGF</td>
			<td style="width:171px;">Peprotech</td>
			<td style="width:135px;">100-18B</td>
			<td style="width:72px;">20 ng/ml</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">EGF</td>
			<td style="width:171px;">Peprotech</td>
			<td style="width:135px;">AF-100-15</td>
			<td style="width:72px;"></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">B27 supplement</td>
			<td style="width:171px;">Life technologies</td>
			<td style="width:135px;">17504-044</td>
			<td style="width:72px;">1X</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">NSC serum free medium</td>
			<td style="width:171px;">Life Technologies</td>
			<td style="width:135px;">A1050901</td>
			<td style="width:72px;">1X</td>
		</tr>
		<tr height="40">
			<td height="43" rowspan="2" style="height:43px;width:208px;">Poly-D-lysine/laminin coated cover slips</td>
			<td rowspan="2" style="width:171px;">BD Bioscences</td>
			<td align="right" rowspan="2" style="width:135px;">354087</td>
			<td rowspan="2" style="width:72px;"></td>
		</tr>
		<tr height="3">
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">cAMP</td>
			<td style="width:171px;">Sigma</td>
			<td style="width:135px;">A9501</td>
			<td style="width:72px;">300 ng/ml</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">Vitamin C</td>
			<td style="width:171px;">Sigma</td>
			<td style="width:135px;">A0278</td>
			<td style="width:72px;">0.2 mM</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">BDNF</td>
			<td style="width:171px;">Peprotech</td>
			<td style="width:135px;">450-02</td>
			<td style="width:72px;">10 ng/ml</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">GDNF</td>
			<td style="width:171px;">Peprotech</td>
			<td style="width:135px;">450-10</td>
			<td style="width:72px;">10 ng/ml</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">Poly-L-Ornithine</td>
			<td style="width:171px;">Sigma</td>
			<td style="width:135px;">P4957</td>
			<td style="width:72px;">1X</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">PDGF-AA</td>
			<td style="width:171px;">Peprotech</td>
			<td style="width:135px;">100-13A</td>
			<td style="width:72px;">10 ng/ml</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">NT-3</td>
			<td style="width:171px;">Peprotech</td>
			<td style="width:135px;">450-03</td>
			<td style="width:72px;">2 ng/ml</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">Shh</td>
			<td style="width:171px;">Peprotech</td>
			<td style="width:135px;">1314-SH/CF</td>
			<td style="width:72px;">2 ng/ml</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">T3</td>
			<td style="width:171px;">Sigma</td>
			<td style="width:135px;">T6397</td>
			<td style="width:72px;">3 nM</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">PFA</td>
			<td style="width:171px;">Sigma</td>
			<td style="width:135px;">P6148</td>
			<td align="right" style="width:72px;">4%</td>
		</tr>
		<tr height="38">
			<td height="38" style="height:38px;width:208px;">PBS</td>
			<td style="width:171px;">Quality Biological</td>
			<td style="width:135px;">119-069-101</td>
			<td style="width:72px;">1X</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">Goat serum</td>
			<td style="width:171px;">Sigma</td>
			<td style="width:135px;">G9023</td>
			<td align="right" style="width:72px;">4%</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">TritonX-100</td>
			<td style="width:171px;">Sigma</td>
			<td style="width:135px;">T9284</td>
			<td style="width:72px;"></td>
		</tr>
		<tr height="41">
			<td height="41" style="height:41px;width:208px;">Mouse monoclonal anti-Nestin</td>
			<td style="width:171px;">Millipore</td>
			<td style="width:135px;">AB5922</td>
			<td style="width:72px;">1:1000 dilution</td>
		</tr>
		<tr height="41">
			<td height="41" style="height:41px;width:208px;">Anti-SOX2&#160; antibody</td>
			<td style="width:171px;">Applied Stemcell</td>
			<td style="width:135px;">ASA0120</td>
			<td style="width:72px;">Ready to use</td>
		</tr>
		<tr height="41">
			<td height="41" style="height:41px;width:208px;">Mouse anti-&#946;III-tubulin antibody</td>
			<td style="width:171px;">Promega</td>
			<td style="width:135px;">G712A</td>
			<td style="width:72px;">1:1000 dilution</td>
		</tr>
		<tr height="43">
			<td height="43" style="height:43px;width:208px;">Rabbit anti-GFAP antibody</td>
			<td style="width:171px;">Sigma</td>
			<td style="width:135px;">G4546</td>
			<td style="width:72px;">1:100 dilution</td>
		</tr>
		<tr height="41">
			<td height="41" style="height:41px;width:208px;">Anti-O4 antibody</td>
			<td style="width:171px;">R&#38;D Systems</td>
			<td style="width:135px;">MAB1326</td>
			<td style="width:72px;">IgM; 1 ng/ml</td>
		</tr>
		<tr height="49">
			<td height="49" style="height:49px;width:208px;">Alexa Fluor 594 goat anti-rabbit antibody</td>
			<td style="width:171px;">Life techniologies</td>
			<td style="width:135px;">A11012</td>
			<td style="width:72px;">1:400 dilution</td>
		</tr>
		<tr height="49">
			<td height="49" style="height:49px;width:208px;">Alexa Fluor 488 goat anti-mouse antibody</td>
			<td style="width:171px;">Life techniologies</td>
			<td style="width:135px;">A11001</td>
			<td style="width:72px;">1:400 dilution</td>
		</tr>
		<tr height="41">
			<td height="41" style="height:41px;width:208px;">Alexa Fluor 488 goat anti-mouse IgM antibody</td>
			<td style="width:171px;">Life techniologies</td>
			<td style="width:135px;">A21042</td>
			<td style="width:72px;">1:250 dilution</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:208px;">DAPI</td>
			<td style="width:171px;">Sigma</td>
			<td style="width:135px;">D9542</td>
			<td style="width:72px;">1 ug/ml</td>
		</tr>
	</tbody>
</table>

direct induction of human neural stem cells from peripheral blood hematopoietic progenitor cells

الأمراض التي تصيب البشر الثقافات العصبية محددة ضرورية لتوليد نماذج في المختبر للأمراض العصبية البشرية. ومع ذلك، فإن عدم الوصول إلى الكبار البشري الثقافات العصبية الأولية يثير تحديات فريدة من نوعها. التطورات الأخيرة في الخلايا الجذعية المحفزة التي يسببها (IPSC) توفر نهجا بديلا لاستخلاص الثقافات العصبية من الخلايا الليفية الجلد من خلال المريض IPSC محددة، ولكن هذه العملية كثيفة العمالة، ويتطلب خبرة خاصة وكميات كبيرة من الموارد، ويمكن أن يستغرق عدة أشهر. هذا يمنع تطبيق واسع لهذه التكنولوجيا لدراسة الأمراض العصبية. للتغلب على بعض من هذه القضايا، وقد وضعنا طريقة لاستخلاص الخلايا الجذعية العصبية مباشرة من الكبار البشري الدم المحيطي، وتجاوز عملية الاشتقاق IPSC. كانت الخلايا الاصلية المكونة للدم المخصب من الكبار البشري الدم المحيطي المستزرعة في المختبر، وtransfected مع ناقلات فيروس سينداي التي تحتوي على عوامل النسخي Sox2 أكتوبر3/4، Klf4، وج. Myc على. نتائج ترنسفكأيشن في تغيرات شكلية في الخلايا التي يتم اختيارها مزيد باستخدام البشري المتوسطة السلف العصبية التي تحتوي على عامل أساسي نمو الخلايا الليفية (bFGF) وعامل نمو بطانة الأوعية الدموية (VEGF). وتتميز الخلايا الناجم عن ذلك التعبير عن علامات الخلايا الجذعية العصبية، مثل nestin وSOX2. هذه الخلايا الجذعية العصبية يمكن أن تكون متباينة أيضا على الخلايا العصبية، دبق نجمي الخلايا و oligodendrocytes في وسائل الإعلام التمايز محدد. يمكن الوصول إليها بسهولة عن طريق عينات الدم المحيطية الإنسان، يمكن أن تستخدم هذه الطريقة لاستخلاص الخلايا الجذعية العصبية لمزيد من التمايز للخلايا العصبية في المختبر لنماذج من الاضطرابات العصبية ويمكن أن تقدم الدراسات المتعلقة المرضية وعلاج تلك الأمراض.

<html> نوعية خلايا CD34 أمر بالغ الأهمية لنجاح العصبي التنبيغ الخلايا الجذعية. خلايا CD34 جودة عالية تتكاثر خلال أول يومين من الثقافة ويبدو أنها غير ملتصقة، وخلايا مستديرة متجانس، وتطفو فوق الجزء السفلي من السفن الثقافة (الشكل 1A). نتائج العدوى الناجحة في المجاميع خ...

Watch this Scientific Journal Video about Direct Induction of Human Neural Stem Cells from Peripheral Blood Hematopoietic Progenitor Cells at JoVE.com

Direct Induction of Human Neural Stem Cells from Peripheral Blood Hematopoietic Progenitor Cells

وقد تم تطوير طريقة لاستخلاص مباشرة الخلايا الجذعية العصبية البشرية من الخلايا الاصلية المكونة للدم التخصيب من خلايا الدم الطرفية.

الحث المباشر من العصبية الإنسان الخلايا الجذعية من خلايا الدم المحيطي المكونة للدم السلف

Human disease specific neuronal cultures are essential for generating in vitro models for human neurological diseases. However, the lack of access to ...

direct-induction-human-neural-stem-cells-from-peripheral-blood

Research

JoVE Journal

Developmental Biology

12.4K Views.  National Institutes of Health.  وقد تم تطوير طريقة لاستخلاص مباشرة الخلايا الجذعية العصبية البشرية من الخلايا الاصلية المكونة للدم التخصيب من خلايا الدم الطرفية. 

Video: Direct Induction of Human Neural Stem Cells from Peripheral Blood Hematopoietic Progenitor Cells

Derivation of Cardiac Progenitor Cells from Embryonic Stem Cells

Cardiac progenitor cells (CPCs) have the capacity to differentiate into cardiomyocytes, smooth muscle cells (SMC), and endothelial cells and hold great promise in cell therapy against heart disease. Among various methods to isolate CPCs, differentiation of embryonic stem cell (ESC) into CPCs attracts great attention in the field since ESCs can provide unlimited cell source. As a result, numerous strategies have been developed to derive CPCs from ESCs. In this protocol, differentiation and purification of embryonic CPCs from both mouse and human ESCs is described. Due to the difficulty of using cell surface markers to isolate embryonic CPCs, ESCs are engineered with fluorescent reporters activated by CPC-specific cre recombinase expression. Thus, CPCs can be enriched by fluorescence-activated cell sorting (FACS). This protocol illustrates procedures to form embryoid bodies (EBs) from ESCs for CPC specification and enrichment. The isolated CPCs can be subsequently cultured for cardiac lineage differentiation and other biological assays. This protocol is optimized for robust and efficient derivation of CPCs from both mouse and human ESCs.

In this protocol, derivation of cardiac progenitor cells from both mouse and human embryonic stem cells will be illustrated. A major strategy in this protocol is to enrich cardiac progenitor cells with flow cytometry using fluorescent reporters engineered into the embryonic stem cell lines.

اشتقاق خلايا القلب السلف من الخلايا الجذعية الجنينية

Cardiac progenitor cells (CPCs) have the capacity to differentiate into cardiomyocytes, smooth muscle cells (SMC), and endothelial cells and hold great ...

Isolation of Neural Stem/Progenitor Cells from the Periventricular Region of the Adult Rat and Human Spinal Cord

Adult rat and human spinal cord neural stem/progenitor cells (NSPCs) cultured in growth factor-enriched medium allows for the proliferation of multipotent, self-renewing, and expandable neural stem cells. In serum conditions, these multipotent NSPCs will differentiate, generating neurons, astrocytes, and oligodendrocytes. The harvested tissue is enzymatically dissociated in a papain-EDTA solution and then mechanically dissociated and separated through a discontinuous density gradient to yield a single cell suspension which is plated in neurobasal medium supplemented with epidermal growth factor (EGF), basic fibroblast growth factor (bFGF), and heparin. Adult rat spinal cord NSPCs are cultured as free-floating neurospheres and adult human spinal cord NSPCs are grown as adherent cultures. Under these conditions, adult spinal cord NSPCs proliferate, express markers of precursor cells, and can be continuously expanded upon passage. These cells can be studied in vitro in response to various stimuli, and exogenous factors may be used to promote lineage restriction to examine neural stem cell differentiation. Multipotent NSPCs or their progeny can also be transplanted into various animal models to assess regenerative repair.

The adult mammalian spinal cord contains neural stem/progenitor cells (NSPCs) that can be isolated and expanded in culture. This protocol describes the harvesting, isolation, culture, and passaging of NSPCs generated from the periventricular region of the adult spinal cord from the rat and from human organ transplant donors.

عزل الخلايا الجذعية العصبية / السلف من المنطقة المحيطة بالبطين في الجرذان الكبار والحبل الشوكي البشري

Adult rat and human spinal cord neural stem/progenitor cells (NSPCs) cultured in growth factor-enriched medium allows for the proliferation of ...

Direct Induction of Hemogenic Endothelium and Blood by Overexpression of Transcription Factors in Human Pluripotent Stem Cells

During development, hematopoietic cells arise from a specialized subset of endothelial cells, hemogenic endothelium (HE). Modeling HE development in vitro is essential for mechanistic studies of the endothelial-hematopoietic transition and hematopoietic specification. Here, we describe a method for the efficient induction of HE from human pluripotent stem cells (hPSCs) by way of overexpression of different sets of transcription factors. The combination of ETV2 and GATA1 or GATA2 TFs is used to induce HE with pan-myeloid potential, while a combination of GATA2 and TAL1 transcription factors allows for the production of HE with erythroid and megakaryocytic potential. The addition of LMO2 to GATA2 and TAL1 combination substantially accelerates differentiation and increases erythroid and megakaryocytic cells production. This method provides an efficient and rapid means of HE induction from hPSCs and allows for the observation of the endothelial-hematopoietic transition in a culture dish. The protocol includes hPSCs transduction procedures and post-transduction analysis of HE and blood progenitors.

This protocol describes the efficient induction of hemogenic endothelium and multipotential hematopoietic progenitors from human pluripotent stem cells via the forced expression of transcription factors.

الحث المباشر للمكون للدم البطانة Endothelium والدم عن طريق overexpression من العوامل المحفزة النسخ في الإنسان الخلايا الجذعية

During development, hematopoietic cells arise from a specialized subset of endothelial cells, hemogenic endothelium (HE). Modeling HE development in vitro ...

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.

جيل من التكامل خالية من الخلايا الجذعية المستحثة متعددة القدرات من الخلايا الطرفية الإنسان الدم وحيدات النوى عن طريق Episomal المتجهات

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

Directed Differentiation of Primitive and Definitive Hematopoietic Progenitors from Human Pluripotent Stem Cells

One of the major goals for regenerative medicine is the generation and maintenance of hematopoietic stem cells (HSCs) derived from human pluripotent stem cells (hPSCs). Until recently, efforts to differentiate hPSCs into HSCs have predominantly generated hematopoietic progenitors that lack HSC potential, and instead resemble yolk sac hematopoiesis.&#160;These resulting hematopoietic progenitors may have limited utility for in vitro disease modeling of various adult hematopoietic disorders, particularly those of the lymphoid lineages. However, we have recently described methods to generate erythro-myelo-lymphoid multilineage definitive hematopoietic progenitors from hPSCs using a stage-specific directed differentiation protocol, which we outline here. Through enzymatic dissociation of hPSCs on basement membrane matrix-coated plasticware, embryoid bodies (EBs) are formed. EBs are differentiated to mesoderm by recombinant BMP4, which is subsequently specified to the definitive hematopoietic program by the GSK3&#946; inhibitor, CHIR99021. Alternatively, primitive hematopoiesis is specified by the PORCN inhibitor, IWP2. Hematopoiesis is further driven through the addition of recombinant VEGF and supportive hematopoietic cytokines. The resulting hematopoietic progenitors generated using this method have the potential to be used for disease and developmental modeling, in vitro.

Here, we present human pluripotent stem cell (hPSC) culture protocols, used to differentiate hPSCs into CD34+ hematopoietic progenitors. This method uses stage-specific manipulation of canonical WNT signaling to specify cells exclusively to either the definitive or primitive hematopoietic program.

وجه التفريق بين فروعه المكونة للدم البدائي والنهائي من الخلايا الجذعية Pluripotent البشرية

One of the major goals for regenerative medicine is the generation and maintenance of hematopoietic stem cells (HSCs) derived from human pluripotent stem ...

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.

تشوندروسيتيس التفريق من الخلايا الجذعية المحفزة المستحثة البشرية المستحثة من الدم

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

Isolation of Endothelial Progenitor Cells from Human Umbilical Cord Blood

The existence of endothelial progenitor cells (EPCs) in peripheral blood and its involvement in vasculogenesis was first reported by Ashara and colleagues1. Later, others documented the existence of similar types of EPCs originating from bone marrow2,3. More recently, Yoder and Ingram showed that EPCs derived from umbilical cord blood had a higher proliferative potential compared to ones isolated from adult peripheral blood4,5,6. Apart from being involved in postnatal vasculogenesis, EPCs have also shown promise as a cell source for creating tissue-engineered vascular and heart valve constructs7,8. Various isolation protocols exist, some of which involve the cell sorting of mononuclear cells (MNCs) derived from the sources mentioned earlier with the help of endothelial and hematopoietic markers, or culturing these MNCs with specialized endothelial growth medium, or a combination of these techniques9. Here, we present a protocol for the isolation and culture of EPCs using specialized endothelial medium supplemented with growth factors, without the use of immunosorting, followed by the characterization of the isolated cells using Western blotting and immunostaining.

The goal of this protocol is to isolate endothelial progenitor cells from umbilical cord blood. Some of the applications include using these cells as a biomarker for identifying patients with cardiovascular risk, treating ischemic diseases, and creating tissue-engineered vascular and heart valve constructs.

عزل خلايا غشائي السلف من دم الحبل السري البشري

The existence of endothelial progenitor cells (EPCs) in peripheral blood and its involvement in vasculogenesis was first reported by Ashara and ...

Single-cell Photoconversion in Living Intact Zebrafish

Animal and plant tissue is composed of distinct populations of cells. These cells interact over time to build and maintain the tissue and can cause disease when disrupted. Scientists have developed clever techniques to investigate characteristics and natural dynamics of these cells within intact tissue by expressing fluorescent proteins in subsets of cells. However, at times, experiments require more selected visualization of cells within the tissue, sometimes at the single-cell or population-of-cells manner. To achieve this and visualize single cells within a population of cells, scientists have utilized single-cell photoconversion of fluorescent proteins. To demonstrate this technique, we show here how to direct UV light to an Eos-expressing cell of interest in an intact, living zebrafish. We then image those photoconverted Eos+ cells 24 h later to determine how they changed in the tissue. We describe two techniques: single cell photoconversion and photoconversions of populations of cell. These techniques can be used to visualize cell-cell interactions, cell-fate and differentiation, and cell migrations, making it a technique that is applicable in numerous biological questions.

Here, we present a protocol to show how cell photoconversion is achieved through UV exposure to specific areas expressing the fluorescent protein, Eos, in living animals.

فوتوكونفيرسيون خلية واحدة في معيشة سليمة الزرد

Animal and plant tissue is composed of distinct populations of cells. These cells interact over time to build and maintain the tissue and can cause ...

Computational Analysis of the Caenorhabditis elegans Germline to Study the Distribution of Nuclei, Proteins, and the Cytoskeleton

The Caenorhabditis elegans (C. elegans) germline is used to study several biologically important processes including stem cell development, apoptosis, and chromosome dynamics. While the germline is an excellent model, the analysis is often two dimensional due to the time and labor required for three-dimensional analysis. Major readouts in such studies are the number/position of nuclei and protein distribution within the germline. Here, we present a method to perform automated analysis of the germline using confocal microscopy and computational approaches to determine the number and position of nuclei in each region of the germline. Our method also analyzes germline protein distribution that enables the three-dimensional examination of protein expression in different genetic backgrounds. Further, our study shows variations in cytoskeletal architecture in distinct regions of the germline that may accommodate specific spatial developmental requirements. Finally, our method enables automated counting of the sperm in the spermatheca of each germline. Taken together, our method enables rapid and reproducible phenotypic analysis of the C. elegans germline.

Computational Analysis of the Caenorhabditis elegans Germline to Study the Distribution of Nuclei, Proteins, and the Cytoskeleton

We present an automated method for three-dimensional reconstruction of the Caenorhabditis elegans germline. Our method determines the number and position of each nucleus within the germline and analyses germline protein distribution and cytoskeletal structure.

التحليل الحسابي ل Germline ايليجانس كاينورهابديتيس دراسة توزيع الأنوية، والبروتينات، وسيتوسكيليتون

The Caenorhabditis elegans (C. elegans) germline is used to study several biologically important processes including stem cell development, apoptosis, and ...

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.

في المختبر توليد المشتقات سميط من البشرية التي يسببها الخلايا الجذعية Pluripotent

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