אנו אסירי תודה לכל חברי מעבדת מאו והו, בעבר ובהווה, על הדיונים המעניינים והתרומות הגדולות לפרויקט. אנו מודים למרכז המחקר הקליני הלאומי לבריאות הילד על התמיכה הגדולה. מחקר זה נתמך כספית על ידי הקרן הלאומית למדעי הטבע של סין (U20A20351 לג'יאנהואה מאו, 82200784 ללידן הו), הקרן למדעי הטבע של מחוז ג'ג'יאנג בסין (No. LQ22C070004 ללידן הו).

אפיון אנטיגנים על פני השטח ויכולת התפשטות ב-MSCs מונעי hiPSC

<ol>
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V. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Bone+marrow+osteogenic+stem+cells:+in+vitro+cultivation+and+transplantation+in+diffusion+chambers.">Bone marrow osteogenic stem cells: in vitro cultivation and transplantation in diffusion chambers.</a> Cell and Tissue Kinetics. 20 (3), 263-272 (1987).</li><li>Friedenstein, A. J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Precursors+for+fibroblasts+in+different+populations+of+hematopoietic+cells+as+detected+by+the+in+vitro+colony+assay+method.">Precursors for fibroblasts in different populations of hematopoietic cells as detected by the in vitro colony assay method.</a> Experimental Hematology. 2 (2), 83-92 (1974).</li><li>Friedenstein, A. J., Gorskaja, J. F., Kulagina, N. N. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Fibroblast+precursors+in+normal+and+irradiated+mouse+hematopoietic+organs.">Fibroblast precursors in normal and irradiated mouse hematopoietic organs.</a> Experimental Hematology. 4 (5), 267-274 (1976).</li><li>El Agha, E., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Mesenchymal+stem+cells+in+fibrotic+disease.">Mesenchymal stem cells in fibrotic disease.</a> Cell Stem Cell. 21 (2), 166-177 (2017).</li><li>Mushahary, D., Spittler, A., Kasper, C., Weber, V., Charwat, V. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Isolation,+cultivation,+and+characterization+of+human+mesenchymal+stem+cells.">Isolation, cultivation, and characterization of human mesenchymal stem cells.</a> Cytometry A. 93 (1), 19-31 (2018).</li><li>Ullah, M., Liu, D. D., Thakor, A. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Mesenchymal+stromal+cell+homing:+Mechanisms+and+strategies+for+improvement.">Mesenchymal stromal cell homing: Mechanisms and strategies for improvement.</a> iScience. 15, 421-438 (2019).</li><li>Regmi, S., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Enhanced+viability+and+function+of+mesenchymal+stromal+cell+spheroids+is+mediated+via+autophagy+induction.">Enhanced viability and function of mesenchymal stromal cell spheroids is mediated via autophagy induction.</a> Autophagy. 17 (10), 2991-3010 (2021).</li><li>Hoang, D. M., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Stem+cell-based+therapy+for+human+diseases.">Stem cell-based therapy for human diseases.</a> Signal Transduction and Targeted Therapy. 7 (1), 272 (2022).</li><li>Jiang, B., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Concise+review:+Mesenchymal+stem+cells+derived+from+human+pluripotent+cells,+an+unlimited+and+quality-controllable+source+for+therapeutic+applications.">Concise review: Mesenchymal stem cells derived from human pluripotent cells, an unlimited and quality-controllable source for therapeutic applications.</a> Stem Cells. 37 (5), 572-581 (2019).</li><li>Soontararak, S., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Mesenchymal+stem+cells+(MSC)+derived+from+induced+pluripotent+stem+cells+(iPSC)+equivalent+to+adipose-derived+MSC+in+promoting+intestinal+healing+and+microbiome+normalization+in+mouse+inflammatory+bowel+disease+model.">Mesenchymal stem cells (MSC) derived from induced pluripotent stem cells (iPSC) equivalent to adipose-derived MSC in promoting intestinal healing and microbiome normalization in mouse inflammatory bowel disease model.</a> Stem Cells Translational Medicine. 7 (6), 456-467 (2018).</li><li>Di Baldassarre, A., Cimetta, E., Bollini, S., Gaggi, G., Ghinassi, B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Human-induced+pluripotent+stem+cell+technology+and+cardiomyocyte+generation:+Progress+and+clinical+applications.">Human-induced pluripotent stem cell technology and cardiomyocyte generation: Progress and clinical applications.</a> Cells. 7 (6), 48 (2018).</li><li>Shi, Y., Inoue, H., Wu, J. C., Yamanaka, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Induced+pluripotent+stem+cell+technology:+a+decade+of+progress.">Induced pluripotent stem cell technology: a decade of progress.</a> Nature Reviews. Drug Discovery. 16 (2), 115-130 (2017).</li><li>Levy, O., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Shattering+barriers+toward+clinically+meaningful+MSC+therapies.">Shattering barriers toward clinically meaningful MSC therapies.</a> Science Advances. 6 (30), eaba6884 (2020).</li><li>Zhao, C., Ikeya, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Generation+and+applications+of+induced+pluripotent+stem+cell-derived+mesenchymal+stem+cells.">Generation and applications of induced pluripotent stem cell-derived mesenchymal stem cells.</a> Stem Cells International. 2018, 9601623 (2018).</li><li>Path, G., Perakakis, N., Mantzoros, C. S., Seufert, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Stem+cells+in+the+treatment+of+diabetes+mellitus+-+Focus+on+mesenchymal+stem+cells.">Stem cells in the treatment of diabetes mellitus - Focus on mesenchymal stem cells.</a> Metabolism. 90, 1-15 (2019).</li><li>Zhou, Y., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=One-step+derivation+of+functional+mesenchymal+stem+cells+from+human+pluripotent+stem+cells.">One-step derivation of functional mesenchymal stem cells from human pluripotent stem cells.</a> Bio-Protocol. 8 (22), e3080 (2018).</li><li>Hua, Z., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Low-intensity+pulsed+ultrasound+promotes+osteogenic+potential+of+iPSC-derived+MSCs+but+fails+to+simplify+the+iPSC-EB-MSC+differentiation+process.">Low-intensity pulsed ultrasound promotes osteogenic potential of iPSC-derived MSCs but fails to simplify the iPSC-EB-MSC differentiation process.</a> Frontiers in Bioengineering and Biotechnology. 10, 841778 (2022).</li><li>Dupuis, V., Oltra, E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Methods+to+produce+induced+pluripotent+stem+cell-derived+mesenchymal+stem+cells:+Mesenchymal+stem+cells+from+induced+pluripotent+stem+cells.">Methods to produce induced pluripotent stem cell-derived mesenchymal stem cells: Mesenchymal stem cells from induced pluripotent stem cells.</a> World Journal of Stem Cells. 13 (8), 1094-1111 (2021).</li><li>Zhang, W., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Aging+stem+cells.+A+Werner+syndrome+stem+cell+model+unveils+heterochromatin+alterations+as+a+driver+of+human+aging.">Aging stem cells. A Werner syndrome stem cell model unveils heterochromatin alterations as a driver of human aging.</a> Science. 348 (6239), 1160-1163 (2015).</li><li>Liu, G. H., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Modelling+Fanconi+anemia+pathogenesis+and+therapeutics+using+integration-free+patient-derived+iPSCs.">Modelling Fanconi anemia pathogenesis and therapeutics using integration-free patient-derived iPSCs.</a> Nature Communications. 5, 4330 (2014).</li><li>Kubben, N., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Repression+of+the+antioxidant+NRF2+pathway+in+premature+aging.">Repression of the antioxidant NRF2 pathway in premature aging.</a> Cell. 165 (6), 1361-1374 (2016).</li><li>Duan, S., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=PTEN+deficiency+reprogrammes+human+neural+stem+cells+towards+a+glioblastoma+stem+cell-like+phenotype.">PTEN deficiency reprogrammes human neural stem cells towards a glioblastoma stem cell-like phenotype.</a> Nature Communications. 6, 10068 (2015).</li><li>Zhang, J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Exosomes+released+from+human+induced+pluripotent+stem+cells-derived+MSCs+facilitate+cutaneous+wound+healing+by+promoting+collagen+synthesis+and+angiogenesis.">Exosomes released from human induced pluripotent stem cells-derived MSCs facilitate cutaneous wound healing by promoting collagen synthesis and angiogenesis.</a> Journal of Translational Medicine. 13, 49 (2015).</li><li>Hu, G. 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למחברים אין מה לחשוף.

בפרוטוקול זה נבדקו שתי שיטות מייצגות להבחנה בין hiPSCs ל-MSCs: 20,21,22,23,24,25,26,27,28,30. שתי השיטות היו מסוגלות לגזור...

תאי סטרומה מזנכימליים (MSCs) הם תאי גזע פלוריפוטנטיים בוגרים שמקורם במזודרם1. MSCs נמצאים כמעט בכל רקמות החיבור2. מאז MSCs התגלו לראשונה בשנת 1970 ובודדו בהצלחה ממח עצם בשנת 1987 על ידי Friedenstein et al.3,4,5, מגוון של רקמות סומטיות אנושיות (כולל עובריות ובוגרות) שימשו לבידוד MSCs כגון עצם, סחוס, גיד, שריר, רקמת שומן, סטרומה תומכת hematopoietic 1,2,6,7 . MSCs מפגינים יכולות שגשוג גבוהות ופלסטיות כדי להתמיין לשושלות תאים סומטיות רבות ויכולים לנדוד לרקמות פצועות ומודלקות 2,8,9. תכונות אלה הופכות MSCs למועמד פוטנציאלי לרפואה רגנרטיבית10. עם זאת, MSCs שמקורם ברקמה סומטית (st-MSCs) מוגבלים על ידי תרומה מוגבלת, יכולת שגשוג תאים מוגבלת, שינויים באיכות וחשש לבטיחות ביולוגית להעברה אפשרית של פתוגנים, אם בכלל, מהתורמים11,12.
תאי גזע פלוריפוטנטיים המושרים על ידי בני אדם (hiPSCs) נגזרים מתאים בוגרים המתכנתים מחדש עם גורמי שעתוק (Oct4, Sox2, Klf4 ו- c-Myc), שיש להם תפקידים דומים לתאי גזע עובריים13,14. הם יכולים לחדש את עצמם ויש להם את הפוטנציאל של התמיינות לכל סוג של תאים סומטיים, כולל MSCs. בהשוואה ל- st-MSCs, ל- iPSC-MSCs יש את היתרון של אספקה בלתי מוגבלת, עלות נמוכה יותר, טוהר גבוה יותר, נוחות בבקרת איכות, קל לייצור בקנה מידה ושינוי גנים 15,16,17.
בשל יתרונות אלה של iPSC-MSCs, דווח על מגוון שיטות המניעות MSC מ- iPSC. שיטות התמיינות אלה התרכזו סביב שתי מתודולוגיות תרבית: (1) היווצרות גופים עובריים (EBs) ו-(2) שימוש בתרביות חד-שכבתיות 11,18,19,20. כאן אופיינה גישה מייצגת לכל אחת משתי המתודולוגיות. כמו כן, נערכה השוואה בין שתי גישות מייצגות המבוססות על זמן, עלות, יכולת שגשוג, ביטוי סמנים ביולוגיים של MSC ויכולת התמיינות במבחנה.

<table border="1" fo:keep-together.within-page="1" fo:keep-with-next.within-page="always">
	<tbody>
		<tr>
			<td>Alizarin red staining kit</td>
			<td>Beyotime&#160;Biotechnology</td>
			<td>C0148S</td>
			<td></td>
		</tr>
		<tr>
			<td>Anti-human-CD105 (PE)</td>
			<td>Biolegend</td>
			<td>323206</td>
			<td></td>
		</tr>
		<tr>
			<td>Anti-human-CD34 (FITC)</td>
			<td>Biolegend</td>
			<td>343503</td>
			<td></td>
		</tr>
		<tr>
			<td>Anti-human-CD45 (APC)</td>
			<td>Biolegend</td>
			<td>304011</td>
			<td></td>
		</tr>
		<tr>
			<td>Anti-human-CD73( APC)</td>
			<td>Biolegend</td>
			<td>344006</td>
			<td></td>
		</tr>
		<tr>
			<td>Anti-human-CD90 (FITC)</td>
			<td>Biolegend</td>
			<td>328108</td>
			<td></td>
		</tr>
		<tr>
			<td>Ascorbic acid</td>
			<td>Solarbio</td>
			<td>A8100</td>
			<td></td>
		</tr>
		<tr>
			<td>BMP-6</td>
			<td>Novoprotein</td>
			<td>C012</td>
			<td></td>
		</tr>
		<tr>
			<td>Carbon dioxide level shaker</td>
			<td>Crystal</td>
			<td>CO-06UC6</td>
			<td></td>
		</tr>
		<tr>
			<td>Compensation Beads</td>
			<td>BioLegend</td>
			<td>424601</td>
			<td></td>
		</tr>
		<tr>
			<td>CryoStor CS10</td>
			<td>STEMCELL Technology</td>
			<td>07959</td>
			<td></td>
		</tr>
		<tr>
			<td>Dexamethasone</td>
			<td>Beyotime&#160;Biotechnology</td>
			<td>ST1254</td>
			<td></td>
		</tr>
		<tr>
			<td>DMEM/F12&#160; medium</td>
			<td>Servicebio</td>
			<td>G4610</td>
			<td></td>
		</tr>
		<tr>
			<td>Fetal bovine serum</td>
			<td>HAKATA</td>
			<td>HS-FBS-500</td>
			<td></td>
		</tr>
		<tr>
			<td>FGF2</td>
			<td>Stemcell</td>
			<td>78003.1</td>
			<td></td>
		</tr>
		<tr>
			<td>Gelatin</td>
			<td>Sigma-Aldrich</td>
			<td>G2500-100G</td>
			<td></td>
		</tr>
		<tr>
			<td>GlutaMAX</td>
			<td>Gibco</td>
			<td>35050061</td>
			<td></td>
		</tr>
		<tr>
			<td>human IgG1 isotype control APC</td>
			<td>BioLegend</td>
			<td>403505</td>
			<td></td>
		</tr>
		<tr>
			<td>human IgG1 isotype control FITC</td>
			<td>BioLegend</td>
			<td>403507</td>
			<td></td>
		</tr>
		<tr>
			<td>human IgG1 isotype control PE</td>
			<td>BioLegend</td>
			<td>403503</td>
			<td></td>
		</tr>
		<tr>
			<td>Human TGF-&#946;1</td>
			<td>Stemcell</td>
			<td>78067</td>
			<td></td>
		</tr>
		<tr>
			<td>Human TruStain FcX&#160;</td>
			<td>BioLegend</td>
			<td>422301</td>
			<td></td>
		</tr>
		<tr>
			<td>IBMX</td>
			<td>Beyotime&#160;Biotechnology</td>
			<td>ST1398</td>
			<td></td>
		</tr>
		<tr>
			<td>Indomethacin</td>
			<td>Solarbio</td>
			<td>SI9020</td>
			<td></td>
		</tr>
		<tr>
			<td>Insulin</td>
			<td>Beyotime&#160;Biotechnology</td>
			<td>P3376</td>
			<td></td>
		</tr>
		<tr>
			<td>iPSC maintenance medium</td>
			<td>STEMCELL Technology</td>
			<td>85850</td>
			<td></td>
		</tr>
		<tr>
			<td>ITS Media Supplement</td>
			<td>Beyotime&#160;Biotechnology</td>
			<td>C0341-10mL</td>
			<td></td>
		</tr>
		<tr>
			<td>Matrigel, growth factor reduced</td>
			<td>BD Corning</td>
			<td>354230</td>
			<td></td>
		</tr>
		<tr>
			<td>Oli Red O staining kit</td>
			<td>Beyotime&#160;Biotechnology</td>
			<td>C0158S</td>
			<td></td>
		</tr>
		<tr>
			<td>Proline</td>
			<td>Solarbio</td>
			<td>P0011</td>
			<td></td>
		</tr>
		<tr>
			<td>Sodium pyruvate</td>
			<td>ThermoFisher</td>
			<td>11360-070</td>
			<td></td>
		</tr>
		<tr>
			<td>TGF&#946;3</td>
			<td>Novoprotein</td>
			<td>CJ44</td>
			<td></td>
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			<td>Toluidine blue staining kit</td>
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			<td>TrypLE Express Enzyme(1x)&#160;</td>
			<td>Gibco</td>
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			<td>Ultra-Low Attachment 6 Well Plate</td>
			<td>Costar</td>
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			<td>Versene</td>
			<td>Gibco</td>
			<td>15040-66</td>
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			<td>Y-27632</td>
			<td>Stemcell</td>
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			<td>&#945;-MEM</td>
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			<td>SH30265</td>
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			<td>&#946;-glycerophosphate</td>
			<td>Solarbio</td>
			<td>G8100</td>
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comparison of two representative methods for differentiation of human induced pluripotent stem cells into mesenchymal stromal cells

תאי סטרומה מזנכימליים (MSCs) הם תאי גזע פלוריפוטנטיים בוגרים הנמצאים בשימוש נרחב ברפואה רגנרטיבית. מכיוון שתאי MSC שמקורם ברקמה סומטית מוגבלים על ידי תרומה מוגבלת, שינויי איכות ובטיחות ביולוגית, בעשר השנים האחרונות חלה עלייה גדולה במאמצים לייצר MSCs מתאי גזע פלוריפוטנטיים המושרים על ידי בני אדם (hiPSCs). מאמצים קודמים ואחרונים בהתמיינות של hiPSCs ל- MSCs התרכזו סביב שתי מתודולוגיות תרבית: (1) היווצרות גופים עובריים (EBs) ו- (2) שימוש בתרבית חד-שכבתית. פרוטוקול זה מתאר שתי שיטות מייצגות אלה בהפקת MSC מ- hiPSCs. כל שיטה מציגה את יתרונותיה וחסרונותיה, לרבות זמן, עלות, יכולת התפשטות תאים, ביטוי סמני MSC ויכולת התמיינות שלהם במבחנה. פרוטוקול זה מדגים כי שתי השיטות יכולות להפיק MSCs בוגרים ופונקציונליים מ- hiPSCs. שיטת החד-שכבתית מאופיינת בעלות נמוכה יותר, תפעול פשוט יותר ובידול אוסטאוגני קל יותר, ואילו שיטת EB מאופיינת בצריכת זמן נמוכה יותר.

Mesenchymal stromal cells (MSCs) are mesoderm-derived adult pluripotent stem cells1. MSCs are present in almost all connective tissues2. Since MSCs were first discovered in the 1970s and successfully isolated from bone marrow in 1987 by Friedenstein et al.3,4,5, a variety of human somatic (including fetal and adult) tissues have been used for isolating MSCs such as bone, cartilage, tendon, muscle, adipose tissue, and hematopoietic-supporting stroma1,2,6,7. MSCs demonstrate high proliferative capabilities and plasticity to differentiate into many somatic cell lineages and could migrate to injured and inflamed tissues2,8,9. These properties make MSCs a potential candidate for regenerative medicine10. However, somatic tissue-derived MSCs (st-MSCs) are restricted by limited donation, limited cell proliferative capacity, quality variations, and biosafety concern for possible transmission of pathogens, if any, from the donors11,12.
Human induced pluripotent stem cells (hiPSCs) are derived from adult cells reprogramming with transcription factors (Oct4, Sox2, Klf4, and c-Myc), which have similar functions as embryonic stem cells13,14. They can self-renew and possess the potential of differentiating into any type of somatic cells, including MSCs. Compared with st-MSCs, iPSC-MSCs has the advantage of unlimited supply, lower cost, higher purity, convenience in quality control, easy for scale production and gene modification15,16,17.
Due to these advantages of iPSC-MSCs, a variety of methods driving MSC from iPSC have been reported. These differentiation methods have been centered around two culture methodologies: (1) the formation of embryoid bodies (EBs) and (2) the use of monolayer cultures11,18,19,20. Herein, a representative approach for each of the two methodologies was characterized. Furthermore, comparisons between two representative approaches based on time, cost, proliferative ability, expression of MSC biomarkers, and differentiation capability in vitro were also accessed.

מחבר זרקור: התקדמות בתאי גזע פלוריפוטנטיים מושרים ובמחקר מחלות גנטיות 

השוואה בין שתי שיטות מייצגות להתמיינות של תאי גזע פלוריפוטנטיים המושרים על ידי בני אדם לתאי סטרומה מזנכימליים

The scope of our study is a mechanism, and a therapeutic strategy research of genetic disease. Our research is based on multilevel disease models, such as cell lines, iPSCs, organoids, and mice. iPSCs have a distinct advantage over other models.iPSCs from patients, and any subsequent derived cells and organoids share the same genome with the patients, which provides a bank of patient cells and models for many disease. Also, with the methods of established iPSCs from patients are quite mature. Many challenges remain in the direction of differentiating of iPSCs into specific cells and organoids, with a deepening understanding of development mechanisms in current development will occur in the field.

בעקבות הפרוטוקול (איור 1A), hiPSCs התמינו ל-MSCs באמצעות שיטות היווצרות EB ותרבית חד-שכבתית. במהלך ההתמיינות, התאים הראו מורפולוגיות מייצגות שונות (איור 1B,C).
כפי שניתן לראות באיור 1B, מושבות hiPSCs מציגות מורפולוגיה קומפקטית טיפ...

Watch this Scientific Journal Video about Advancements in iPSCs and Genetic Disease Research at JoVE.com

פרוטוקול זה מתאר ומשווה שתי שיטות מייצגות להבחנה של hiPSCs לתאי סטרומה מזנכימליים (MSCs). השיטה החד-שכבתית מאופיינת בעלות נמוכה יותר, תפעול פשוט יותר ובידול אוסטאוגני קל יותר. שיטת הגופים העובריים (EBs) מאופיינת בצריכת זמן נמוכה יותר.

Mesenchymal stromal cells (MSCs) are adult pluripotent stem cells which have been widely used in regenerative medicine. As somatic tissue-derived MSCs are ...

היקף המחקר שלנו הוא מנגנון, ומחקר אסטרטגי טיפולי של מחלות גנטיות. המחקר שלנו מבוסס על מודלים רב-שכבתיים של מחלות, כגון קווי תאים, תאי גזע פלוריפוטנטיים מוגנים, אורגנואידים ועכברים. לתאי iPSC יש יתרון מובהק על פני דגמים אחרים.iPSCs מחולים, וכל התאים והאורגנואידים הנגזרים לאחר מכן חולקים את אותו גנום עם החולים, מה שמספק בנק של תאי חולים ומודלים למחלות רבות. כמו כן, עם השיטות של iPSCs הוקמה מחולים הם בוגרים למדי. אתגרים רבים נותרו בכיוון של התמיינות של תאי גזע פלוריפוטנטיים מושרים לתאים ואורגנואידים ספציפיים, עם הבנה מעמיקה של מנגנוני הפיתוח בפיתוח הנוכחי בתחום.

comparison-two-representative-methods-for-differentiation-human

Research

JoVE Journal

Biology

Comparison of Two Representative Methods for Differentiation of Human Induced Pluripotent Stem Cells into Mesenchymal Stromal Cells

773 Views.  The Children's Hospital, Zhejiang University School of Medicine. היקף המחקר שלנו הוא מנגנון, ומחקר אסטרטגי טיפולי של מחלות גנטיות. המחקר שלנו מבוסס על מודלים רב-שכבתיים של מחלות, כגון קווי תאים, תאי גזע פלוריפוטנטיים מוגנים, אורגנואידים ועכברים. לתאי iPSC יש יתרון מובהק על פני דגמים אחרים.iPSCs מחולים, וכל התאים והאורגנואידים הנגזרים לאחר...

Video: מחבר זרקור: התקדמות בתאי גזע פלוריפוטנטיים מושרים ובמחקר מחלות גנטיות 

Mesenchymal stromal cells (MSCs) are adult pluripotent stem cells which have been widely used in regenerative medicine. As somatic tissue-derived MSCs are restricted by limited donation, quality variations, and biosafety, the past 10 years have seen a great rise in efforts to generate MSCs from human induced pluripotent stem cells (hiPSCs). Past and recent efforts in the differentiation of hiPSCs into MSCs have been centered around two culture methodologies: (1) the formation of embryoid bodies (EBs) and (2) the use of monolayer culture. This protocol describes these two representative methods in deriving MSC from hiPSCs. Each method presents its advantages and disadvantages, including time, cost, cell proliferation ability, the expression of MSC markers, and their capability of differentiation in vitro. This protocol demonstrates that both methods can derive mature and functional MSCs from hiPSCs. The monolayer method is characterized by lower cost, simpler operation, and easier osteogenic differentiation, while the EB method is characterized by lower time consumption.

This protocol describes and compares two representative methods for differentiating hiPSCs into mesenchymal stromal cells (MSCs). The monolayer method is characterized by lower cost, simpler operation, and easier osteogenic differentiation. The embryoid bodies (EBs) method is characterized by lower time consumption.

MSCs Differentiation from hiPSCs via EB Formation and Monolayer Culture

To begin, culture hiPSCs in IPSC maintenance medium on a six-well tissue culture plate coated with growth factor reduced extracellular matrix gel. When the cells attain 80 to 90%v, remove the medium from the plate and wash the cells once with DPBS. Then add 700 to 800 microliters of 0.48 millimolar EDTA and incubate for one minute at room temperature.Remove the digestion solution and incubate the plate at 37 degrees Celsius for three to five minutes. When cells are digested into sheets, add two milliliters of IPSCs maintenance medium to terminate digestion. Transfer the cell suspension to a six-well low attachment plate.Incubate the cells at 37 degrees Celsius with 5%carbon dioxide and 60 RPM to form spherical embryo bodies or EBs. After 24 hours, using a past pipette, transfer the EBs to the centrifuge tube and allow it to sediment for five to 10 minutes before removing the supernatant. Add MSC differentiation medium to the tube and transfer the EBs to a six-well low attachment blade with two milliliters of MSCs differentiation medium.Culture the EBs on the shaker at 37 degrees Celsius with 5%carbon dioxide for seven days. On the eighth day, transfer the EBs to the centrifuge tube as demonstrated previously. Once the EBs are sedimented, remove the supernatant from the tube.Add MSC maintenance medium into the tube and transfer the EBs to a growth factor reduced extracellular matrix gel coated six-well plate with two milliliters of MSC maintenance medium. After cell adhesion, change the medium until the culture attains 90%confluency. Next, treat the EB derived culture with a dissociation solution at 37 degrees Celsius.When part of the cells are digested into single cells, add two milliliters of the MSC maintenance medium to terminate digestion and transfer the cell suspension to a centrifuge tube. Wash the remaining undigested cells from the wells once with DPBS. And digest again as demonstrated previously.Then centrifuge the cell suspension at 250g for five minutes. Remove the supernatant and seed the cells in a gelatin coated culture plate. Culture the cells in MSC maintenance medium to 90%confluency with regular medium change.Culture hiIPCs lines as demonstrated previously. When the cells attain 50 to 60%confluency, remove the IPSC maintenance medium from the plate. Add two milliliters of MSC maintenance medium.And culture for 14 days at 37 degrees Celsius and 5%carbon dioxide with daily medium change. For the maturation of MSCs, treat the monolayer culture with a dissociation solution at 37 degrees Celsius. When part of the cells are digested into single cells, add two milliliters of the MSC maintenance medium into the wells to terminate digestion and transfer the cell suspension to a centrifuge tube.Wash the remaining undigested cells once with DPBS and digest them as demonstrated previously. Then centrifuge the cell suspension as demonstrated previously and seed the cells on a gelatin coated culture dish. Culture the cells in MSC maintenance medium to 90%confluency with regular medium change.In the EB formation method, hiIPCs colonies exhibited a compact morphology before differentiation. After dissociation, uniform spherical EBs formed, which drew in volume over time. Subsequently, EBs transformed into adherent monolayer cells achieving 90%confluency by day 18 and acquiring a spindle shape morphology after two passages.Similarly, in the monolayer method, cells proliferated forming multilayer adherent cells. After packaging multiple times, cells matured into MSC with a typical spindle shape and swirling colony. Flow cytometry analysis revealed that hiIPCs were positive for CD90 and negative for CD34, CD45, CD105, and CD73.After differentiation, the hiIPCs driving MSCs expressed CD90, CD73, and CD105, while remaining negative for CD34 and CD45. Monolayer derived MSCs showed higher calcium deposit formation than the EB method. However, no significant differences were observed in adipogenic and chondrogenic differentiation abilities.The proliferation abilities of both methods were maintained for up to 20 passages.