This work was financially supported by the National Science Foundation for Distinguished Young Scholars (82125018).

The human umbilical cord was obtained from Beijing Tsinghua Changgeng Hospital. All procedures and protocols regarding the acquisition, isolation, and culture of human umbilical cord mesenchymal stem cells (UCMSCs) were conducted with informed consent and with the approval of the Ethics Committee of Beijing Tsinghua Changgeng Hospital (filing number 22035-4-02), and the procedures and protocols complied with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
...

Closed System Production of Adherent Cells Based on Dissolvable Microcarriers

<ol>
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R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Durable+cell+and+gene+therapy+potential+patient+and+financial+impact:+US+projections+of+product+approvals,+patients+treated,+and+product+revenues.">Durable cell and gene therapy potential patient and financial impact: US projections of product approvals, patients treated, and product revenues.</a> Drug Discovery Today. 27 (1), 17-30 (2022).</li><li>Elverum, K., Whitman, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Delivering+cellular+and+gene+therapies+to+patients:+solutions+for+realizing+the+potential+of+the+next+generation+of+medicine.">Delivering cellular and gene therapies to patients: solutions for realizing the potential of the next generation of medicine.</a> Gene Therapy. 27 (12), 537-544 (2020).</li><li>Blache, U., Popp, G., D&#252;nkel, A., Koehl, U., Fricke, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Potential+solutions+for+manufacture+of+CAR+T+cells+in+cancer+immunotherapy.">Potential solutions for manufacture of CAR T cells in cancer immunotherapy.</a> Nature Communications. 13 (1), 5225 (2022).</li><li>Lee, 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=Cell+culture+process+scale-up+challenges+for+commercial-scale+manufacturing+of+allogeneic+pluripotent+stem+cell+products.">Cell culture process scale-up challenges for commercial-scale manufacturing of allogeneic pluripotent stem cell products.</a> Bioengineering. 9 (3), 92 (2022).</li><li>Emerson, J., Glassey, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Bioprocess+monitoring+and+control:+Challenges+in+cell+and+gene+therapy.">Bioprocess monitoring and control: Challenges in cell and gene therapy.</a> Current Opinion in Chemical Engineering. 34, 100722 (2021).</li><li>Robb, K. P., Fitzgerald, J. C., Barry, F., Viswanathan, 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+therapy:+progress+in+manufacturing+and+assessments+of+potency.">Mesenchymal stromal cell therapy: progress in manufacturing and assessments of potency.</a> Cytotherapy. 21 (3), 289-306 (2019).</li><li>Olsen, T. R., Ng, K. S., Lock, L. T., Ahsan, T., Rowley, J. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Peak+MSC-Are+we+there+yet.">Peak MSC-Are we there yet.</a> Frontiers in Medicine. 5, 178 (2018).</li><li>. Roots Analysis. Stem Cell Therapy Contract Manufacturing (CMO) Market, 2019 - 2030 Available from: <a target="_blank" href="https://www.rootsanalysis.com/reports/view_document/stem-cell-therapy-contract-manufacturing-market-2019-2030/271.html">https://www.rootsanalysis.com/reports/view_document/stem-cell-therapy-contract-manufacturing-market-2019-2030/271.html</a> (2019)</li><li>Elseberg, C. L., 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=Microcarrier-based+expansion+process+for+hMSCs+with+high+vitality+and+undifferentiated+characteristics.">Microcarrier-based expansion process for hMSCs with high vitality and undifferentiated characteristics.</a> The International Journal of Artificial Organs. 35 (2), 93-107 (2012).</li><li>de Soure, A. M., Fernandes-Platzgummer, A., Silva, d. a., L, C., Cabral, J. 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Part C, Methods. 26 (5), 263-275 (2020).</li><li>Carletti, E., Motta, A., Migliaresi, C., Haycock, J. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Scaffolds+for+tissue+engineering+and+3D+cell+culture.">Scaffolds for tissue engineering and 3D cell culture.</a> 3D Cell Culture: Methods and Protocols. , 17-39 (2011).</li><li>Loh, Q. L., Choong, C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Three-dimensional+scaffolds+for+tissue+engineering+applications:+Role+of+porosity+and+pore+size.">Three-dimensional scaffolds for tissue engineering applications: Role of porosity and pore size.</a> Tissue Engineering. Part B Reviews. 19 (6), 485-502 (2013).</li><li>Zhang, 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=GMP-grade+microcarrier+and+automated+closed+industrial+scale+cell+production+platform+for+culture+of+MSCs.">GMP-grade microcarrier and automated closed industrial scale cell production platform for culture of MSCs.</a> Journal of Tissue Engineering and Regenerative Medicine. 16 (10), 934-944 (2022).</li><li>NMPA. Pharmaceutical Excipient Registration Database: Microcarrier tablets for cells. Center for Drug Evaluation Available from: <a target="_blank" href="https://www.cde.org.cn/main/xxgk/listpage/ba7aed094c29ae314670a3563a716e">https://www.cde.org.cn/main/xxgk/listpage/ba7aed094c29ae314670a3563a716e</a> (2023)</li><li>List of Drug Master Files (DMFs). US Food and Drug Administration Available from: <a target="_blank" href="https://www.fda.gov/drug-mater-files-dmfs/list-drug-master-files-dmfs">https://www.fda.gov/drug-mater-files-dmfs/list-drug-master-files-dmfs</a> (2023)</li><li>Beeravolu, 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=Isolation+and+characterization+of+mesenchymal+stromal+cells+from+human+umbilical+cord+and+fetal+placenta.">Isolation and characterization of mesenchymal stromal cells from human umbilical cord and fetal placenta.</a> Journal of Visualized Experiments. (122), e55224 (2017).</li><li>Xie, 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=The+quality+evaluation+system+establishment+of+mesenchymal+stromal+cells+for+cell-based+therapy+products.">The quality evaluation system establishment of mesenchymal stromal cells for cell-based therapy products.</a> Stem Cell Research &amp; Therapy. 11 (1), 176 (2020).</li><li>Maillot, C., Sion, C., De Isla, N., Toye, D., Olmos, E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Quality+by+design+to+define+critical+process+parameters+for+mesenchymal+stem+cell+expansion.">Quality by design to define critical process parameters for mesenchymal stem cell expansion.</a> Biotechnology Advances. 50, 107765 (2021).</li><li>Silva Couto, P., 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=Expansion+of+human+mesenchymal+stem/stromal+cells+(hMSCs)+in+bioreactors+using+microcarriers:+Lessons+learnt+and+what+the+future+holds.">Expansion of human mesenchymal stem/stromal cells (hMSCs) in bioreactors using microcarriers: Lessons learnt and what the future holds.</a> Biotechnology Advances. 45, 107636 (2020).</li><li>Chen, 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=Facile+bead-to-bead+cell-transfer+method+for+serial+subculture+and+large-scale+expansion+of+human+mesenchymal+stem+cells+in+bioreactors.">Facile bead-to-bead cell-transfer method for serial subculture and large-scale expansion of human mesenchymal stem cells in bioreactors.</a> Stem Cells Translational Medicine. 10 (9), 1329-1342 (2021).</li><li>Tsai, A. C., Pacak, C. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Bioprocessing+of+human+mesenchymal+stem+cells:+From+planar+culture+to+microcarrier-based+bioreactors.">Bioprocessing of human mesenchymal stem cells: From planar culture to microcarrier-based bioreactors.</a> Bioengineering. 8 (7), 96 (2021).</li><li>Hewitt, C. 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=Expansion+of+human+mesenchymal+stem+cells+on+microcarriers.">Expansion of human mesenchymal stem cells on microcarriers.</a> Biotechnology Letters. 33 (11), 2325-2335 (2011).</li><li>Mawji, I., Roberts, E. L., Dang, T., Abraham, B., Kallos, M. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Challenges+and+opportunities+in+downstream+separation+processes+for+mesenchymal+stromal+cells+cultured+in+microcarrier-based+stirred+suspension+bioreactors.">Challenges and opportunities in downstream separation processes for mesenchymal stromal cells cultured in microcarrier-based stirred suspension bioreactors.</a> Biotechnology and Bioengineering. 119 (11), 3062-3078 (2022).</li><li>Schirmaier, C., 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=Scale-up+of+adipose+tissue-derived+mesenchymal+stem+cell+production+in+stirred+single-use+bioreactors+under+low-serum+conditions.">Scale-up of adipose tissue-derived mesenchymal stem cell production in stirred single-use bioreactors under low-serum conditions.</a> Engineering in Life Sciences. 14 (3), 292-303 (2014).</li><li>Lawson, T., 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=Process+development+for+expansion+of+human+mesenchymal+stromal+cells+in+a+50L+single-use+stirred+tank+bioreactor.">Process development for expansion of human mesenchymal stromal cells in a 50L single-use stirred tank bioreactor.</a> Biochemical Engineering Journal. 120, 49-62 (2017).</li><li>Yang, 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=Large-scale+microcarrier+culture+of+HEK293T+cells+and+Vero+cells+in+single-use+bioreactors.">Large-scale microcarrier culture of HEK293T cells and Vero cells in single-use bioreactors.</a> AMB Express. 9 (1), 70 (2019).</li><li>Fang, 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=Development+of+scalable+vaccinia+virus-based+vector+production+process+using+dissolvable+porous+microcarriers.">Development of scalable vaccinia virus-based vector production process using dissolvable porous microcarriers.</a> 25th Annual Meeting of the American Society of Gene &amp; Cell Therapy. Molecular Therapy. 30, 195-196 (2022).</li></ol>

Both immunotherapy and stem cell therapy utilize live cells as drugs; however, their final products should not be purified or sterilized in the same way as small molecules or viruses. Therefore, the principle of Quality by Design (QbD) should always be kept in mind and practically applied to the Chemical Manufacturing and Control (CMC) process during cell production23. A fully closed cell culture system, as well as a processing system and a filling system, are preferentially considered to meet the...

The CGT industry has witnessed an exponential expansion over the past two decades. The evolution of next-generation medicines is anticipated to treat and cure numerous refractory diseases1. Since the first Food and Drug Administration (FDA) approval of a CGT product, Kymriah, in 2017, CGT-related research and development in the world has continued to grow at a fast rate, with the FDA seeing active investigational new drug applications for CGT increased to 500 in 20182. It had been predicted that the number of approvals of CGT products will likely be 54-74 in the United States by 20302.
While the rapid growth in CGT research and innovation is exciting, there is still a large technological gap between lab research and industrial-scale manufacturing that could deliver these promising medicines to reach as many patients as needed at affordable costs. The current processes adopted for these clinical trials were established in labs for small-scale experiments, and significant efforts are needed to improve and innovate on CGT manufacturing3. There are many types of CGT products, most of them based on live cells, which can be allogenic, autologous, engineered, or natural. These living drugs are much more complex than small molecular entities or biologics, hence making large-scale manufacturing a significant challenge4,5,6. In this work, we demonstrate a large-scale cell production protocol for three anchorage-dependent cells that are widely applied in CGTs. These include human mesenchymal stem/stromal cells (hMSCs), which have been used for cell-based therapy, and HEK293T cells and Vero cells, both of which are used to produce viruses for the genetic engineering of the final therapeutic cell product. Anchorage-dependent cells are commonly cultured on planar systems, which require manual processing. However, manual culture methods require a significant amount of labor and are prone to contamination, which can compromise the quality of the end product. Furthermore, there is no in-line process control, leading to substantial variability in quality between batches7. Taking stem cell therapy as an example, with a promising pipeline of over 200 stem-cell therapy candidates, it is estimated that 300 trillion hMSCs would be needed per year to meet the demands of clinical applications8. Hence, the large-scale manufacturing of therapeutic cells has become a prerequisite to perform these therapeutic interventions with such a high cell demand9.
To preclude the setbacks of planar systems, efforts have been made in developing large-scale manufacturing processes in stirred-tank bioreactors with conventional non-dissolvable microcarriers10,11,12,13, but these suffer from complicated preparation procedures and low cell-harvesting efficiency14. Recently, we have innovated a dissolvable microcarrier for stem cell expansion, aiming to circumvent the challenges of cell harvesting from conventional non-dissolvable commercial microcarriers15. This novel, commercially available GMP-grade 3D dissolvable porous microcarrier, 3D TableTrix, has shown great potential for large-scale cell production. Indeed, 3D culture based on these porous microcarriers could potentially recreate favorable biomimetic microenvironments to promote cell adhesion, proliferation, migration, and activation16. The porous structures and interconnected pore networks of microcarriers could create a larger cell adhesion area and promote the exchange of oxygen, nutrients, and metabolites, thus creating an optimal substrate for in vitro cell expansion17. The high porosity of these GMP-grade 3D dissolvable porous microcarriers enables large-scale expansion of hMSCs, and the ability for the cells to be fully dissolved allows for the efficient harvesting of these expanded cells18. It is also a GMP-grade product and has been registered as a pharmaceutical excipient with the Chinese Center for Drug Evaluation (filing numbers: F20210000003 and F20200000496)19 and the FDA of the United States (FDA, USA; Drug Master File number: 35481)20.
Here, we illustrate an automated closed industrial scale cell production (ACISCP) system18 using these dispersible and dissolvable porous microcarriers for hMSC, HEK293T cell, and Vero cell expansion. We achieved a successful two-tiered expansion of hMSCs (128 cumulative fold expansion in 9 days) from a 5 L bioreactor to a 15 L bioreactor and finally obtained up to 1.1 x 1010 hMSCs from a single batch of production. The cells were harvested by completely dissolving the microcarriers, concentrated, washed and formulated with a continuous flow centrifuge-based cell processing system, and then aliquoted with a cell filling system. Furthermore, we assessed the quality of hMSC products to confirm compliance. We also demonstrated the application of these dissolvable microcarriers for the scaled-up production of two other types of anchorage cells, HEK293T cells and Vero cells, that are extensively applied in the CGT industry. The peak cell density of HEK293T cells reached 1.68 x 107 cells/mL, whereas the peak density of Vero cells reached 1.08 x 107 cells/mL. The ACISCP system could be adapted to culture a variety of adherent cells, and it could potentially become a powerful platform contributing to expediting the industrialization of CGT.

<table border="1" fo:keep-together.within-page="1" fo:keep-with-next.within-page="always">
	<tbody>
		<tr >
			<td >0.25% trypsin EDTA</td>
			<td >BasalMedia</td>
			<td >S310JV</td>
			<td >Used for 2D cell harvest.</td>
		</tr>
		<tr >
			<td >3D FloTrix Digest</td>
			<td >CytoNiche Biotech</td>
			<td >R001-500</td>
			<td >This is a reagent that specifically dissolves 3D TableTrix microcarriers.</td>
		</tr>
		<tr >
			<td >3D FloTrix MSC Serum Free Medium</td>
			<td >CytoNiche Biotech</td>
			<td >RMZ112</td>
			<td >This is a serum-free,animal-free medium for mesenchymal stem cell expansion and maintenance in 2D planar culture as well as 3D culture on 3D TableTrix microcarriers.</td>
		</tr>
		<tr >
			<td >3D FloTrix Single-Use Filtration Module</td>
			<td >CytoNiche Biotech</td>
			<td >R020-00-10</td>
			<td >This module contains 0.22 &#956;m capsule filters used for filtration of culture medium and digest solution.</td>
		</tr>
		<tr >
			<td >3D FloTrix Single-Use Storage Bag (10 L)</td>
			<td >CytoNiche Biotech</td>
			<td >R020-00-03</td>
			<td >Used as feed bag for 5 L bioreactor.</td>
		</tr>
		<tr >
			<td >3D FloTrix Single-Use Storage Bag (3 L)</td>
			<td >CytoNiche Biotech</td>
			<td >R020-00-01</td>
			<td >Used as cell seeding or transfer bags.</td>
		</tr>
		<tr >
			<td >3D FloTrix Single-Use Storage Bag (50 L)</td>
			<td >CytoNiche Biotech</td>
			<td >R020-00-04</td>
			<td >Used as feed bag for 15 L bioreactor.</td>
		</tr>
		<tr >
			<td >3D FloTrix vivaPACK Disposable Fill&#38;Finish Consumable Kit</td>
			<td >CytoNiche Biotech</td>
			<td >PACK-01-01</td>
			<td >This is a standard kit adapted to 3D vivaPACK fill and finish system.</td>
		</tr>
		<tr >
			<td >3D FloTrix vivaPACK fill and finish system for cells</td>
			<td >CytoNiche Biotech</td>
			<td >vivaPACK</td>
			<td >This system is a closed liquid handling device, with automated mixing and gas exhausting functions. Cells resuspended in cryopreservation buffer can be rapidly and evenly aliquoted into 20 bags per batch.</td>
		</tr>
		<tr >
			<td >3D FloTrix vivaPREP PLUS cell processing system</td>
			<td >CytoNiche Biotech</td>
			<td >vivaPREP PLUS</td>
			<td >This system is a continuous flow centrifuge-based device.Cells can be concentrated, washed, and resuspended under completely closed procedures.</td>
		</tr>
		<tr >
			<td >3D FloTrix vivaPREP PLUS Disposable Cell Processing Kit</td>
			<td >CytoNiche Biotech</td>
			<td >PREP-PLUS-00</td>
			<td >This is a standard kit adapted to 3D vivaPREP PLUS cell processing.</td>
		</tr>
		<tr >
			<td >3D FloTrix vivaSPIN&#160; bioreactor 15 L</td>
			<td >CytoNiche Biotech</td>
			<td >FTVS15</td>
			<td >This bioreactor product employs a controller, a 15 L glass stirred-tank vessel, and assessories. A special perfusion tube is available.</td>
		</tr>
		<tr >
			<td >3D FloTrix vivaSPIN&#160; bioreactor 5 L</td>
			<td >CytoNiche Biotech</td>
			<td >FTVS05</td>
			<td >This bioreactor product employs a controller, a 5 L glass stirred-tank vessel, and assessories.A special perfusion tube is available.</td>
		</tr>
		<tr >
			<td >3D FloTrix vivaSPIN Closed System Consumable Pack (10/15 L)</td>
			<td >CytoNiche Biotech</td>
			<td >R020-10-10</td>
			<td >This is a standard tubing kit adapted to 3D vivaSPIN bioreactor 15 L, containing sampling bags.</td>
		</tr>
		<tr >
			<td >3D FloTrix vivaSPIN Closed System Consumable Pack (2/5 L)</td>
			<td >CytoNiche Biotech</td>
			<td >R020-05-10</td>
			<td >This is a standard tubing kit adapted to 3D vivaSPIN bioreactor 5 L, containing sampling bags.</td>
		</tr>
		<tr >
			<td >3D TableTrix microcarriers G02</td>
			<td >CytoNiche Biotech</td>
			<td >G02-10-10g</td>
			<td >These porous and degradable microcarriers are suitable for HEK293T cell culture. They come pre-sterilized in 10g/bottle with C-Flex tubings for welding to tubes on bioreactors.</td>
		</tr>
		<tr >
			<td >3D TableTrix microcarriers V01</td>
			<td >CytoNiche Biotech</td>
			<td >V01-100-10g</td>
			<td >These porous and degradable microcarriers are suitable for adherent cell culture, they come as non-sterilized microcarriers that need to be autoclaved in PBS before use. They are especially suitable for vaccine production.</td>
		</tr>
		<tr >
			<td >3D TableTrix microcarriers W01</td>
			<td >CytoNiche Biotech</td>
			<td >W01-10-10g (single-use packaging); 
			W01-200 (tablets)</td>
			<td >These porous and degradable microcarriers are suitable for adherent cell culture, especially for cells that need to be harvested as end products. They come pre-sterilized in 10g/bottle with C-Flex tubings for welding to tubes on bioreactors.The product has obtained 2 qualifications for pharmaceutical excipients from CDE, with the registration numbers of [F20200000496; F20210000003]. It has also received DMF qualification for pharmaceutical excipients from FDA, with the registration number of [DMF:35481]</td>
		</tr>
		<tr >
			<td >APC anti-human CD45 Antibody</td>
			<td >BioLegend</td>
			<td >368512</td>
			<td >Used in flow cytometry for MSC identity assessment</td>
		</tr>
		<tr >
			<td >Calcein-AM/PI Double Staining Kit</td>
			<td >Dojindo</td>
			<td >C542</td>
			<td >Calcein-AM/PI Double Staining Kit is utilized for simultaneous fluorescence staining of viable and dead cells. This kit contains Calcein-AM and Propidium Iodide (PI) solutions, which stain viable and dead cells, respectively.</td>
		</tr>
		<tr >
			<td >Cap for EZ Top Container Closures for NALGENE-containers (500mL)</td>
			<td >Saint-Gobain</td>
			<td>CAP-38</td>
			<td >Brands and catalogue numbers are only for example, similar products are available from various suppliers and as long as they have the same functionality, items could be substituted with other brands.</td>
		</tr>
		<tr >
			<td >C-Flex Tubing, Formulation 374 (0.25 in x 0.44 in)</td>
			<td >Saint-Gobain</td>
			<td >374-250-3</td>
			<td >Used for tube welding and disconnection.</td>
		</tr>
		<tr >
			<td >CryoMACS Freezing Bag 50</td>
			<td >Miltenyi Biotec&#160;</td>
			<td >200-074-400</td>
			<td >Used for expanding the 3D FloTrix vivaPACK Disposable Fill&#38;Finish Consumable Kit.</td>
		</tr>
		<tr >
			<td >Dimethyl Sulfate (DMSO)&#160;</td>
			<td >Sigma</td>
			<td >D2650-100mL</td>
			<td >Used for preparation of cryopreservation solution.</td>
		</tr>
		<tr >
			<td >Dulbecco&#39;s Modified Eagle Medium (DMEM)</td>
			<td >BasalMedia</td>
			<td >L120KJ</td>
			<td >Used for cultivation of HEK293T and Vero cells.</td>
		</tr>
		<tr >
			<td >DURAN Original GL 45 Laboratory bottle (2 L)</td>
			<td >DWK life sciences</td>
			<td >218016357</td>
			<td >Used for waste collection from the 5 L bioreactor.</td>
		</tr>
		<tr >
			<td >DURAN Original GL 45 Laboratory bottle (5 L)</td>
			<td >DWK life sciences</td>
			<td >218017353</td>
			<td >Used for waste collection from the 15 L bioreactor.</td>
		</tr>
		<tr >
			<td >DURAN Original GL 45 Laboratory bottle (500 mL)</td>
			<td >DWK life sciences</td>
			<td >218014459</td>
			<td >Used for supplementary bottle of 0.1 M NaOH.</td>
		</tr>
		<tr >
			<td >EZ Top Container Closures for NALGENE-containers (500mL)</td>
			<td >Saint-Gobain</td>
			<td>EZ500 ML-38-2</td>
			<td >Brands and catalogue numbers are only for example, similar products are available from various suppliers and as long as they have the same functionality, items could be substituted with other brands.</td>
		</tr>
		<tr >
			<td >Fetal bovine serum (FBS) superior quality</td>
			<td >Wisent</td>
			<td >086-150</td>
			<td >Used for cultivation of HEK293T cells.</td>
		</tr>
		<tr >
			<td >FITC anti-human CD14 Antibody</td>
			<td >BioLegend</td>
			<td >301804</td>
			<td >Used in flow cytometry for MSC identity assessment.</td>
		</tr>
		<tr >
			<td >FITC anti-human CD34 Antibody</td>
			<td >BioLegend</td>
			<td >343504</td>
			<td >Used in flow cytometry for MSC identity assessment.</td>
		</tr>
		<tr >
			<td >FITC anti-human CD90 (Thy1) Antibody</td>
			<td >BioLegend</td>
			<td >328108</td>
			<td >Used in flow cytometry for MSC identity assessment.</td>
		</tr>
		<tr >
			<td >Flow cytometry</td>
			<td >Beckman Coulter</td>
			<td >CytoFLEX</td>
			<td >Used for cell identity assessment.</td>
		</tr>
		<tr >
			<td >Fluorescence Cell Analyzer</td>
			<td >Alit life science</td>
			<td >Countstar Rigel S2</td>
			<td >Used for cell counting. Cell viability can be calculated by staining with AO/PI dyes.</td>
		</tr>
		<tr >
			<td >GL 45 Multiport Connector Screw Cap with 2 ports&#160;</td>
			<td >DWK life sciences</td>
			<td >292632806</td>
			<td >Brands and catalogue numbers are only for example, similar products are available from various suppliers and as long as they have the same functionality, items could be substituted with other brands.</td>
		</tr>
		<tr >
			<td >Glucose Meter</td>
			<td >Sinocare</td>
			<td >6243578</td>
			<td >Used for detecting glucose concentration in cell culture medium and supernatant.</td>
		</tr>
		<tr >
			<td >Hank&#39;s Balanced Salt Solution (HBSS), with calcium and magnesium</td>
			<td >Gibco</td>
			<td >14025092</td>
			<td >Used for preparation of digest solution.</td>
		</tr>
		<tr >
			<td >Human Albumin 20% Behring (HSA)</td>
			<td >CSL Behring</td>
			<td >N/A</td>
			<td >Used for preparation of wash buffer.</td>
		</tr>
		<tr >
			<td >Inverted fluorescent microscope</td>
			<td >OLYMBUS</td>
			<td >CKX53SF</td>
			<td >Used for brifgt field and fluorescent observation and imaging.</td>
		</tr>
		<tr >
			<td >Nalgene Measuring Cylinder (500 mL)</td>
			<td >Thermo Scientific</td>
			<td >3662-0500PK</td>
			<td >Used for calibrating the liquid handling volume speed of peristaltic pumps.</td>
		</tr>
		<tr >
			<td >Newborn calf serum (NBS) superfine</td>
			<td >MINHAI BIO</td>
			<td >SC101.02</td>
			<td >Used for cultivation of Vero cells.</td>
		</tr>
		<tr >
			<td >OriCell human mesenchymal stem cell adipogenic differentiation and characterization kit</td>
			<td >Cyagen</td>
			<td >HUXUC-90031</td>
			<td >Used for tri-lineage differentiation of hUCMSCs.</td>
		</tr>
		<tr >
			<td >OriCell human mesenchymal stem cell chondrogenic differentiation and characterization kit</td>
			<td >Cyagen</td>
			<td >HUXUC-90041</td>
			<td >Used for tri-lineage differentiation of hUCMSCs.</td>
		</tr>
		<tr >
			<td >OriCell human mesenchymal stem cell osteogenic differentiation and characterization kit</td>
			<td >Cyagen</td>
			<td >HUXUC-90021</td>
			<td >Used for tri-lineage differentiation of hUCMSCs.</td>
		</tr>
		<tr >
			<td >PE anti-human CD105 Antibody</td>
			<td >BioLegend</td>
			<td >800504</td>
			<td >Used in flow cytometry for MSC identity assessment.</td>
		</tr>
		<tr >
			<td >PE anti-human CD19 Antibody</td>
			<td >BioLegend</td>
			<td >302208</td>
			<td >Used in flow cytometry for MSC identity assessment.</td>
		</tr>
		<tr >
			<td >PE anti-human CD73 (Ecto-5&#39;-nucleotidase) Antibody</td>
			<td >BioLegend</td>
			<td >344004</td>
			<td >Used in flow cytometry for MSC identity assessment.</td>
		</tr>
		<tr >
			<td >PE anti-human HLA-DR Antibody</td>
			<td >BioLegend</td>
			<td >307605</td>
			<td >Used in flow cytometry for MSC identity assessment.</td>
		</tr>
		<tr >
			<td >Phosphate Buffered Saline (PBS)</td>
			<td >Wisent</td>
			<td >311-010-CL</td>
			<td >Used in autoclaving of glass vessel and V01 microcarriers, and replacement of culture medium.</td>
		</tr>
		<tr >
			<td >Sani-Tech Platinum Cured Sanitary Silicone Tubing (0.13 in x 0.25 in)</td>
			<td >Saint-Gobain</td>
			<td >ULTRA-C-125-2F</td>
			<td >Used for solution transfering driven by peristaltic pumps.</td>
		</tr>
		<tr >
			<td >Sterile Saline</td>
			<td >Hopebiol</td>
			<td >HBPP008-500</td>
			<td >Used for preparation of wash buffer.</td>
		</tr>
		<tr >
			<td >Trypzyme Recombinant Trypsin</td>
			<td >BasalMedia</td>
			<td >S342JV</td>
			<td >This reagent is used for bead-to-bead transfer of HEK293T and Vero cells.</td>
		</tr>
		<tr >
			<td >Tube Sealer</td>
			<td >Yingqi Biotech</td>
			<td >Tube Sealer I</td>
			<td >This sealer is compatible with both C-Flex tubing and PVC tubing.</td>
		</tr>
		<tr >
			<td >Tube Welder for PVC tubing</td>
			<td >Chu Biotech</td>
			<td >Tube Welder Micro I</td>
			<td >Used for welding of PVC tubing.</td>
		</tr>
		<tr >
			<td >Tube Welder for TPE tubing</td>
			<td >Yingqi Biotech</td>
			<td >Tube Welder I-V2</td>
			<td >Used for welding of TPE tubing.</td>
		</tr>
		<tr >
			<td >ViaStain AO / PI Viability Stains</td>
			<td >Nexcelom</td>
			<td >CS2-0106-25mL</td>
			<td >Dual-Fluorescence Viability, using acridine orange (AO) and propidium iodide (PI), is the recommended method for accurate viability analysis of primary cells, such as PBMCs, and stem cells in samples containing debris.</td>
		</tr>
	</tbody>
</table>

large-scale cell production based on gmp-grade dissolvable porous microcarriers

Researchers in the cell and gene therapy (CGT) industry have long faced a formidable challenge in the efficient and large-scale expansion of cells. To address the primary shortcomings of the two-dimensional (2D) planar culturing system, we innovatively developed an automated closed industrial scale cell production (ACISCP) platform based on a GMP-grade, dissolvable, and porous microcarrier for the 3D culture of adherent cells, including human mesenchymal stem/stromal cells (hMSCs), HEK293T cells, and Vero cells. To achieve large-scale expansion, a two-stage expansion was conducted with 5 L and 15 L stirred-tank bioreactors to yield 1.1 x 1010 hMSCs with an overall 128-fold expansion within 9 days. The cells were harvested by completely dissolving the microcarriers, concentrated, washed and formulated with a continuous-flow centrifuge-based cell processing system, and then aliquoted with a cell filling system. Compared with 2D planar culture, there are no significant differences in the quality of hMSCs harvested from 3D culture. We have also applied these dissolvable porous microcarriers to other popular cell types in the CGT sector; specifically, HEK293T cells and Vero cells have been cultivated to peak cell densities of 1.68 x 107 cells/mL and 1.08 x 107 cells/mL, respectively. This study provides a protocol for using a bioprocess engineering platform harnessing the characteristics of GMP-grade dissolvable microcarriers and advanced closed equipment to achieve the industrial-scale manufacturing of adherent cells.

Author Spotlight: Advancing Cell Therapy Manufacturing with Dissolvable Microcarriers 

Large-Scale Cell Production Based on GMP-Grade Dissolvable Porous Microcarriers

The cell and gene therapy industry has witnessed an exponential expansion over the past two decades. However, a large technological gap exists between lab research and industrial skill manufacturing. Compliant with regulatory policies, and to meet the green demands of the CGT industry, automated closed systems have been adopted to produce cell therapeutics.For adherent cells, cultivation using microcarriers in scalable stirred-tank bioreactors, is a promising method. Conventionally, commercialized microcarriers are non-desirable. Cell harvesting using trypsinization and the saving out microcarriers by size is not only inefficient and challenging, but also impacts cell quality and causes safety concerns.In this study, we have successfully achieved large-scale cell production based on GMP-grade 3D TableTrix dissolvable microcarriers in an automated and closed system. Over 11 billion human mesenchymal stem cells were yield in a two-stage expansion within nine days. We also demonstrated high density culture of HEK293T cells and Vero cells, in which both densities reached above 10 million cells per milliliter.This advanced biomanufacturing platform allows adherence cells to be effectively expanded and completely harvested in an automated and closed manner. Our protocol offers an opportunity to enhance production efficiency and refine quality control at industrial-scale manufacturing of CGT products.

The ACISCP platform is a fully closed system that employs a series of stirred-tank bioreactors for scale-up expansion, a cell processing system for automated cell harvesting and formulation, and a cell filling system (Figure 1). Adherent cells attach to the porous microcarriers, which can be dispersed into the bioreactor, thus achieving the suspended cultivation of adherent cells.
Following the protocol as described, 2.5 x 108 hMSCs with 10 g of W01 mic...

Watch this Scientific Journal Video about Advancing Cell Therapy Manufacturing with Dissolvable Microcarriers at JoVE.com

Here, we present a protocol to achieve the large-scale manufacturing of adherent cells through a fully closed system based on GMP-grade dissolvable microcarriers. The cultivation of human mesenchymal stem cells, HEK293T cells, and Vero cells was validated and met both quantity demands and quality criteria for the cell and gene therapy industry.

Researchers in the cell and gene therapy (CGT) industry have long faced a formidable challenge in the efficient and large-scale expansion of cells. To ...

large-scale-cell-production-based-on-gmp-grade-dissolvable-porous

Research

JoVE Journal

Bioengineering

2.0K ビュー.  Tsinghua University. 細胞・遺伝子治療業界は、過去20年間で急激な拡大を遂げてきました。しかし、ラボでの研究と産業技術の製造の間には、大きな技術的ギャップが存在します。規制政策に準拠し、CGT業界のグリーン需要を満たすために、細胞治療薬を製造するために自動化されたクローズドシステムが採用されています。接着細胞の場合、スケーラブルな攪拌タンクバイオリアク?...

ビデオ: 著者スポットライト:溶解性マイクロキャリアによる細胞治療製造の進歩 

Here, we present a protocol to achieve the large-scale manufacturing of adherent cells through a fully closed system based on GMP-grade dissolvable microcarriers. The cultivation of human mesenchymal stem cells, HEK293T cells, and Vero cells was validated and met both quantity demands and quality criteria for the cell and gene therapy...

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chimeric antigen receptor t cell manufacturing on an automated cell processor

Author Spotlight: Advancements in CAR-T Cell Manufacturing and Gene Therapy Production 

This article details the manufacturing process for chimeric antigen receptor T cells for clinical use, specifically using an automated cell processor capable of performing viral transduction and cultivation of T cells. We provide recommendations and describe pitfalls that should be considered during the process development and implementation of an early-phase clinical...

Automated Processor for Clinical-Scale CAR-T Cell Manufacturing

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a streamlined and standardized procedure for generating high-titer, high-quality adeno-associated virus vectors utilizing a cell factory platform

Author Spotlight: Advancing Gene Therapy Research with High-Titer Adeno-Associated Virus Vector Production

As the field of gene therapy continues to evolve, there is a growing need for innovative methods that can address these challenges. Here, a unique method is presented, which streamlines the process of generating high-yield and high-purity AAV vectors using a cell factory platform, meeting the quality standards for in vivo...

Efficient Adeno-Associated Virus Vector Production Using a Cell Factory Platform

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in vitro culturing technique for studying cellular dynamics in zebrafish scales

Author Spotlight: Advancing Bone Cell Activity Research with Zebrafish Scales 

This protocol offers a method to study cellular dynamics using a simple in vitro culture technique. It provides an opportunity for zebrafish researchers and educators to study cellular processes, such as those related to bone homeostasis and basic cell biology, by visualizing fluorescent nuclei and apoptotic cells within the...

Removing Zebrafish Scales for Culturing and Bone Biology Studies

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enhancement of facial rejuvenation through a combination of 1565 nm non-ablative fractional laser with 30% supramolecular salicylic acid

Author Spotlight: Advancing Facial Rejuvenation Therapy with Post-Laser Salicylic Acid Application

The purpose of this project is to effectively reduce the occurrence of adverse reactions such as erythema and pigmentation after non-ablative fractional laser treatment by combining 1565 non-ablative fractional laser with 30% super molecular salicylic acid, providing patients with a safer new method of facial rejuvenation...

Minimizing Pigmentation in Laser Treatment Using Salicylic Acid

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production of high-yield adeno associated vector batches using hek293 suspension cells

Author Spotlight: Advancing Gene Therapy with High-Yield AAV Vectors Through HEK293 Suspension Cell Cultivation

Here, a suspension HEK293 cell-based AAV production protocol is presented, resulting in reduced time and labor needed for vector production using components that are available for research purposes from commercial vendors.

Simplified and Efficient AAV Production Using HEK293 Suspension Culture

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formation of human thymus organoids in three-dimensional fibrin hydrogels

Author Spotlight: Advancing Thymic Epithelial Cells and T-Cell Research with Human Thymic Organoids

Here, we describe a protocol for the formation of human iPSC-derived thymus organoids grown in 3D fibrin hydrogels aiming to support thymic epithelial cell (TEC) maturation and prolonged maintenance, as well as thymopoiesis in...

Recreating the Thymic Microenvironment with iPSC-Derived Organoids

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recombinant collagen i peptide microcarriers for cell expansion and their potential use as cell delivery system in a bioreactor model

Recombinant Collagen I Peptide Microcarriers for Cell Expansion and Their Potential Use As Cell Delivery System in a Bioreactor Model

We propose a cell expansion protocol on macroporous microcarriers and their use as delivery system in a perfusion bioreactor to seed a decellularized tissue matrix. We also include different techniques to determine cell proliferation and viability of cells cultured on microcarriers. Furthermore, we demonstrate functionality of cells after bioreactor...

growing desmoplastic three-dimensional pancreatic cancer spheroids from co-culture

Author Spotlight: Validating Cancer Therapy Responses with Desmoplastic Spheroid Models

Pancreatic cancer remains one of the toughest cancers to treat. Therefore, it is critical that pre-clinical models evaluating treatment efficacy are reproducible and clinically relevant. This protocol describes a simple co-culture procedure to generate reproducible, clinically relevant desmoplastic...

3D-PDAC Model Capturing Desmoplasia for Therapeutic Evaluation

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synthesis of persistent luminescent nanoparticles for rewritable displays and illumination applications

Author Spotlight: Advancing Bioimaging and Therapy with Functional Nanomaterials

A protocol is presented for the synthesis of persistent luminescent nanomaterials (PLNPs) and their potential applications in rewritable displays and artistic processing utilizing the afterglow effect under ultraviolet light (365 nm) irradiation.

Hydrothermal Synthesis of Persistent Luminescent Nanoparticles

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3d printing of in vitro hydrogel microcarriers by alternating viscous-inertial force jetting

3D Printing of In Vitro Hydrogel Microcarriers by Alternating Viscous-Inertial Force Jetting

Presented here is a mild 3D printing technique driven by alternating viscous-inertial forces to enable the construction of hydrogel microcarriers. Homemade nozzles offer flexibility, allowing easy replacement for different materials and diameters. Cell binding microcarriers with a diameter of 50-500 &#181;m can be obtained and collected for further...

3D Printing of In Vitro Hydrogel Microcarriers by Alternating Viscous-Inertial Force Jetting

operating and biocontainment procedures of a facility for laboratory mice with a natural microbiome: immunophenotyping procedure

Author Spotlight: Advancing Murine Research with a Facility for Handling Wildling Mice

Here, we describe the structure and operating procedures, including microbial containment measures of a facility for "Wilding mice" using blood sampling for immunophenotyping as an...

Operational Protocols for Handling Wildling Mice in Research Facilities

clinical efficacy of small needle knife therapy on stage i-ii frozen shoulder

Author Spotlight: Treating Frozen Shoulder with Small Needle Knife Therapy 

The protocol presented here describes the detailed operation method and proves the effectiveness of a small needle knife in the treatment of frozen...

Therapeutic Efficacy of Small Needle Knife Therapy in Treating Frozen Shoulder

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the flexible rhino-laryngoscope for awake nasotracheal intubation

Author Spotlight: Advancing Awake Nasotracheal Intubation with Flexible Video Rhino-Laryngoscopes

Presented here is a protocol for awake nasotracheal intubation using a flexible rhino-laryngoscope with a 300 mm working length. As this tool is minimally invasive and easy to manipulate, awake intubation performed with a flexible rhino-laryngoscope is well-tolerated, fast, and safe for patients with difficult...

Awake Intubation in Difficult Airways: A Flexible Video Laryngoscope Method

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fabrication of extracellular matrix-derived foams and microcarriers as tissue-specific cell culture and delivery platforms

Fabrication of Extracellular Matrix-derived Foams and Microcarriers as Tissue-specific Cell Culture and Delivery Platforms

The tissue-specific extracellular matrix (ECM) is a key mediator of cell function. This article describes methods for synthesizing pure ECM-derived foams and microcarriers that are stable in culture without the need for chemical crosslinking for applications in advanced 3D in vitro cell culture models or as pro-regenerative...

flow cytometry-based isolation and therapeutic evaluation of tumor-infiltrating lymphocytes in a mouse model of pancreatic cancer

Author Spotlight: Advancing Adoptive Cell Therapy 

We describe a method to utilize tumor-infiltrating lymphocytes (TILs) from mice through flow cytometry for adoptive cell transfer. This protocol aims to verify the specific cytotoxicity of TILs against tumors in a syngeneic pancreatic cancer mouse model, providing insights into the development of adoptive cell therapies for pancreatic...

Adoptive Therapy Using Tumor-Infiltrating Lymphocytes in Pancreatic Cancer Models

using the endoscope for endobronchial ultrasound in the esophagus

Author Spotlight: Advancing Biopsy Techniques with Transesophageal Ultrasound

Transesophageal ultrasound (EUS-B) is a safe and feasible procedure using the echoendobronchoscope (EBUS) in esophagus and stomach. After identifying six anatomical landmarks, additional structures can be identified and biopsied, sparing subsequent diagnostic sessions. Thus, EUS-B is an ideal continuation of bronchoscopy and EBUS in diagnosing lung cancer and other...

Integrating Transesophageal Ultrasound with an Echoendobronchoscope

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curcuminoid-mediated antimicrobial photodynamic therapy on a murine model of oral candidiasis

Author Spotlight: Exploring Photodynamic Therapy with Curcumin in a Murine Model for Oral Candidiasis

This protocol describes the application of antimicrobial Photodynamic Therapy (aPDT) in a murine model of oral candidiasis. aPDT was performed using a water-soluble mixture of curcuminoids and blue LED...

Effective aPDT Using Curcuminoids for Oral Candidiasis in Mice

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Chimeric Antigen Receptor T Cell Manufacturing on an Automated Cell Processor

Preparation of the Stirred-Tank Bioreactor for Large-Scale Production of Human Mesenchymal Stem Cells

To begin, perform two-point calibration on the pH probe with a bioreactor controller. Then, to assemble a bioreactor vessel, install parts such as stainless tubes and impellers onto the head plate according to the manufacturer's instructions. Attach a ready-to-use culture-disposable consumable kit to the appropriate stainless steel parts, tubes, and ports on the head plate following the manufacturer's guidance.Upon assembling the vessel, perform an air-tightness check of the fully assembled vessel as specified by the manufacturer's instructions. Autoclave the vessel with the consumable kit at 15 PSI and 121 degrees Celsius for 60 minutes. After cooling the vessel to room temperature, insert the temperature probe into the thermowell tube and connect the cables for the monitor, pH probe, and DO probe from the controller to the respective parts on the vessel.Wrap the heat mat around the vessel tightly. Log into the system of the bioreactor controller and enter the parameters into the system according to the manufacturer's instructions. Weld the outlet tube on the medium bottle to the inlet C-Flex tube on the bottle containing 10 grams of pre-sterilized W01 microcarriers for MSC.Pump 500 milliliters of culture medium from the storage bag into the bottle of microcarriers W01.

Two-Tiered Expansion of Human Mesenchymal Stem Cells from 5-Liter to 15-Liter Bioreactors and Automated Cell Formulation from a 15-Liter Bioreactor

From the stirred tank bioreactor vessel, stop the temperature pH and DO control on the bioreactor controller temporarily and fully dispense all the PBS from the vessel into the waste bottle. Weld to single use filtration module to a port on the 10 liter single use storage bag. Filter and transfer the complete serum free MSC medium into the storage bag.Set the pump one speed to 300 RPM. And dispense one liter of medium from the feed bag into the vessel. Stop the pump.And start the temperature pH and dissolved to DO again, as per the manufacturer's instructions. Seal and disconnect the tube connecting the feedback to the feed tube. Weld the tube from the bottle of dispersed micro carriers to the feed tube.And pump all the contents from the bottle into the vessel. Next, re-suspend 2.5 times 10 to the eight HMCs in a serum free medium and transfer them to the empty bottle previously containing the micro carrier suspension. Add serum free medium to 500 milliliters in total inside the bottle and mix the cell suspension.Pump all the contents from the bottle into the vessel. Seal and disconnect the tube connecting the bottle to the feed tube and then weld back the feed bag. Adjust agitation settings on the controller to initiate cell inoculation to the micro carriers.And set up an automated medium supplement and exchange regime. Weld the disposable sampling bags to the sampling tube. And collect samples at the desired time points.At the time of cell harvest on the controller, set the agitation speed to zero for the micro carriers to settle. And dispense supernatant into the feed regime, leaving approximately one liter of culture suspension in the vessel. Weld the bag containing 50 milliliters of freshly prepared digest solution to 500 milliliters of HBSS for dilution.And pump all solution into the vessel, via the feed tube. Set the agitation speed between 40 to 45 RPM to dissolve the micro carriers. After the micro carriers have dissolved within 40 to 60 minutes, weld the disposable three liter storage bag to the harvest tube and completely pump out the cell suspension.Turn on the cell processing system during cell harvest. And install a disposable cells processing kit on the instrument, according to the manufacturer's instructions. Weld the bags of cell suspension, wash buffer and culture medium to the kit.Enter the operational parameters and start the automated wash and re-suspension process. Collect the sample of cells from the centrifuge chamber as indicated by the cell processing systems for cell density calculation. After counting, readjust the cell density to two times 10 to the six cells per milliliter, using the complete serum free medium.For the cell formulation process in a 15 liter bioreactor, use formulation buffer to re-suspend the harvested cells. Weld 250 milliliters of re-suspended cells to the cell filling. Assemble the disposable fill and finish consumable kit onto the cell filling system.And turn on the pre-cooling system, following the manufacturer's instructions before the cells have been re-suspended. Follow the instructions on the system and set it to fill 30 milliliters per bag with a total of 20 bags per set. Weld the new set of 20 cryo-preservation bags to the disposable fill and finish consumable kit and repeat the fill and finish until all cells are aliquoted.For hMSCs, accumulative 128 fold expansion was achieved with cell viability above 90%Glucose intake exhibited a negative correlation with cell expansion, showing metabolism associated with healthy cell growth. Freshly harvested MSCs retain classical phenotypic markers with more than 95%expression for positive markers and less than 2%for negative markers. The cryo-preserved cells showed good adhesion, normal expansion behavior and typical spindle shape with spiral growth after thawing and re-plating to 2D flasks.Furthermore, the cells also maintained their capability to differentiate into osteogenic, adipogenic and chondrogenic lineages. This platform can be adopted to cultivate other anchorage-dependent cells as well, such as HEK293T and Vero cells. After the B2B transfer process in the 15 liter bioreactor, the HEK293T cells reached a peak cell concentration of 1.68 times 10 of the seven cells per milliliter.While the Vero cells reached a concentration of 1.08 times 10 to the seven cells. Both cell types maintained high viability.