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Melocchi A, Schmittlein B, Jones AL, Ainane Y, Rizvi A, Chan D, Dickey E, Pool K, Harsono K, Szymkiewicz D, Scarfogliero U, Bhatia V, Sivanantham A, Kreciglowa N, Hunter A, Gomez M, Tanner A, Uboldi M, Batish A, Balcerek J, Kutova-Stoilova M, Paruthiyil S, Acevedo LA, Stadnitskiy R, Carmichael S, Aulbach H, Hewitt M, Jeu XDMD, Robilant BD, Parietti F, Esensten JH. Development of a robotic cluster for automated and scalable cell therapy manufacturing. Cytotherapy 2024:S1465-3249(24)00098-7. [PMID: 38647505 DOI: 10.1016/j.jcyt.2024.03.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 03/11/2024] [Accepted: 03/11/2024] [Indexed: 04/25/2024]
Abstract
BACKGROUND AIMS The production of commercial autologous cell therapies such as chimeric antigen receptor T cells requires complex manual manufacturing processes. Skilled labor costs and challenges in manufacturing scale-out have contributed to high prices for these products. METHODS We present a robotic system that uses industry-standard cell therapy manufacturing equipment to automate the steps involved in cell therapy manufacturing. The robotic cluster consists of a robotic arm and customized modules, allowing the robot to manipulate a variety of standard cell therapy instruments and materials such as incubators, bioreactors, and reagent bags. This system enables existing manual manufacturing processes to be rapidly adapted to robotic manufacturing, without having to adopt a completely new technology platform. Proof-of-concept for the robotic cluster's expansion module was demonstrated by expanding human CD8+ T cells. RESULTS The robotic cultures showed comparable cell yields, viability, and identity to those manually performed. In addition, the robotic system was able to maintain culture sterility. CONCLUSIONS Such modular robotic solutions may support scale-up and scale-out of cell therapies that are developed using classical manual methods in academic laboratories and biotechnology companies. This approach offers a pathway for overcoming manufacturing challenges associated with manual processes, ultimately contributing to the broader accessibility and affordability for personalized immunotherapies.
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Affiliation(s)
- Alice Melocchi
- Multiply Labs, San Francisco, California, USA; Sezione di Tecnologia e Legislazione Farmaceutiche "M. E. Sangalli", Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Milano, Italy.
| | | | - Alexis L Jones
- Multiply Labs, San Francisco, California, USA; Department of Health Sciences and Technology, Harvard-Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | | | - Ali Rizvi
- Multiply Labs, San Francisco, California, USA
| | - Darius Chan
- Multiply Labs, San Francisco, California, USA
| | | | - Kelsey Pool
- Multiply Labs, San Francisco, California, USA
| | | | | | | | | | | | | | | | | | | | - Marco Uboldi
- Multiply Labs, San Francisco, California, USA; Sezione di Tecnologia e Legislazione Farmaceutiche "M. E. Sangalli", Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Milano, Italy
| | - Arpit Batish
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, California, USA
| | - Joanna Balcerek
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, California, USA
| | - Mariella Kutova-Stoilova
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, California, USA
| | - Sreenivasan Paruthiyil
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, California, USA
| | - Luis A Acevedo
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, California, USA
| | - Rachel Stadnitskiy
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, California, USA
| | | | | | - Matthew Hewitt
- Charles River Scientific, Wilmington, Massachusetts, USA
| | | | | | | | - Jonathan H Esensten
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, California, USA; The Advanced Biotherapy Center (ABC), Sheba Medical Center, Tel Hashomer, Israel
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Mizuno M, Abe K, Kakimoto T, Hasebe H, Kagi N, Sekiya I. Operator-derived particles and falling bacteria in biosafety cabinets. Regen Ther 2024; 25:264-272. [PMID: 38304617 PMCID: PMC10831277 DOI: 10.1016/j.reth.2024.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/14/2023] [Accepted: 01/08/2024] [Indexed: 02/03/2024] Open
Abstract
Introduction To ensure the sterility of cell products that cannot undergo conventional sterilization processes, it is imperative to establish and maintain a clean room environment, regulated through environmental monitoring, including particle counts. Nevertheless, the impact of particles generated by operators as potential contaminants remains uncertain. Thus, in this study, we conducted an accelerated test to assess the correlation between particles generated by operators and airborne bacteria, utilizing biosafety cabinets within a typical laboratory setting. These biosafety cabinets create a controlled environment with air conditioning and high-efficiency particulate air (HEPA) filters, offering fundamental data relevant to cell production. Materials and methods We conducted a simulation followed by real-time experiments involving human operations to explore the quantity of particles, particle sizes, and the percentage of bacteria within these particles. This investigation focused on conditions with heightened particle generation from operators within a biosafety cabinet. The experiment was conducted on operators wearing textile and non-woven dustless clothing within biosafety cabinets. It entailed tapping the upper arms for a duration of 2 min. Results Observations under biosafety cabinet-off conditions revealed the presence of various particles and falling bacteria in textile clothing. In contrast, no particles or falling bacteria were detected in operators wearing dustless clothing within biosafety cabinets. Notably, a correlation between 5 μm particles and colony-forming units in textile clothing was identified through this analysis. The ratio of falling bacteria to the total number of particles within the biosafety cabinet was 0.8 ± 0.5 % for textile clothing, while it was significantly lower at 0.04 ± 0.2 % for dustless clothing. Conclusion This study demonstrated that the number of particles and falling bacteria varied depending on the type of clothing and that quantitative data could be used to identify risks and provide basic data for operator education and evidence-based control methods in aseptic manufacturing areas. Although, this study aims to serve as an accelerated test operating under worst-case conditions, the results need to make sure the study range in general research.
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Affiliation(s)
- Mitsuru Mizuno
- Center for Stem Cell and Regenerative Medicine, Tokyo Medical and Dental University (TMDU), 1-5-45, Bunkyo-ku, Yushima, Tokyo 113-8519, Japan
| | - Koki Abe
- Energy Saving Technology Group, Center for Carbon Neutral Engineering, Institute of Technology, SHIMIZU CORPORATION, 3-4-17, Koto-ku, Etchūjima, Tokyo, 135-8530, Japan
| | - Takashi Kakimoto
- Planning & Public Relations Group, R&D Planning Department, Institute of Technology, SHIMIZU CORPORATION, 3-4-17, Koto-ku, Etchūjima, Tokyo, 135-0044, Japan
| | - Hisashi Hasebe
- Energy Saving Technology Group, Center for Carbon Neutral Engineering, Institute of Technology, SHIMIZU CORPORATION, 3-4-17, Koto-ku, Etchūjima, Tokyo, 135-8530, Japan
| | - Naoki Kagi
- Department of Architecture and Building Engineering, School of Environment and Society, Tokyo Institute of Technology, Ookayama 2-12-1, Meguro-ku, Tokyo, 152-8552, Japan
| | - Ichiro Sekiya
- Center for Stem Cell and Regenerative Medicine, Tokyo Medical and Dental University (TMDU), 1-5-45, Bunkyo-ku, Yushima, Tokyo 113-8519, Japan
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Hulme CH, Garcia JK, Mennan C, Perry J, Roberts S, Norris K, Baird D, Rix L, Banerjee R, Meyer C, Wright KT. The Upscale Manufacture of Chondrocytes for Allogeneic Cartilage Therapies. Tissue Eng Part C Methods 2023; 29:424-437. [PMID: 37395490 PMCID: PMC10517319 DOI: 10.1089/ten.tec.2023.0037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 06/03/2023] [Indexed: 07/04/2023] Open
Abstract
Allogeneic chondrocyte therapies need to be developed to allow more individuals to be treated with a cell therapy for cartilage repair and to reduce the burden and cost of the current two-stage autologous procedures. Upscale manufacture of chondrocytes using a bioreactor could help provide an off-the-shelf allogeneic chondrocyte therapy with many doses being produced in a single manufacturing run. In this study, we assess a good manufacturing practice-compliant hollow-fiber bioreactor (Quantum®) for adult chondrocyte manufacture. Chondrocytes were isolated from knee arthroplasty-derived cartilage (n = 5) and expanded in media supplemented with 10% fetal bovine serum (FBS) or 5% human platelet lysate (hPL) on tissue culture plastic (TCP) for a single passage. hPL-supplemented cultures were then expanded in the Quantum bioreactor for a further passage. Matched, parallel cultures in hPL or FBS were maintained on TCP. Chondrocytes from all culture conditions were characterized in terms of growth kinetics, morphology, immunoprofile, chondrogenic potential (chondrocyte pellet assays), and single telomere length analysis. Quantum expansion of chondrocytes resulted in 86.4 ± 38.5 × 106 cells in 8.4 ± 1.5 days, following seeding of 10.2 ± 3.6 × 106 cells. This related to 3.0 ± 1.0 population doublings in the Quantum bioreactor, compared with 2.1 ± 0.6 and 1.3 ± 1.0 on TCP in hPL- and FBS-supplemented media, respectively. Quantum- and TCP-expanded cultures retained equivalent chondropotency and mesenchymal stromal cell marker immunoprofiles, with only the integrin marker, CD49a, decreasing following Quantum expansion. Quantum-expanded chondrocytes demonstrated equivalent chondrogenic potential (as assessed by ability to form and maintain chondrogenic pellets) with matched hPL TCP populations. hPL manufacture, however, led to reduced chondrogenic potential and increased cell surface positivity of integrins CD49b, CD49c, and CD51/61 compared with FBS cultures. Quantum expansion of chondrocytes did not result in shortened 17p telomere length when compared with matched TCP cultures. This study demonstrates that large numbers of adult chondrocytes can be manufactured in the Quantum hollow-fiber bioreactor. This rapid, upscale expansion does not alter chondrocyte phenotype when compared with matched TCP expansion. Therefore, the Quantum provides an attractive method of manufacturing chondrocytes for clinical use. Media supplementation with hPL for chondrocyte expansion may, however, be unfavorable in terms of retaining chondrogenic capacity.
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Affiliation(s)
- Charlotte H. Hulme
- Centre for Regenerative Medicine Research, School of Pharmacy and Bioengineering, Keele University, Keele, Staffordshire, United Kingdom
- Robert Jones and Agnes Hunt Orthopaedic Hospital, Oswestry, Shropshire, United Kingdom
| | - John K. Garcia
- Centre for Regenerative Medicine Research, School of Pharmacy and Bioengineering, Keele University, Keele, Staffordshire, United Kingdom
- Robert Jones and Agnes Hunt Orthopaedic Hospital, Oswestry, Shropshire, United Kingdom
| | - Claire Mennan
- Centre for Regenerative Medicine Research, School of Pharmacy and Bioengineering, Keele University, Keele, Staffordshire, United Kingdom
- Robert Jones and Agnes Hunt Orthopaedic Hospital, Oswestry, Shropshire, United Kingdom
| | - Jade Perry
- Centre for Regenerative Medicine Research, School of Pharmacy and Bioengineering, Keele University, Keele, Staffordshire, United Kingdom
- Robert Jones and Agnes Hunt Orthopaedic Hospital, Oswestry, Shropshire, United Kingdom
| | - Sally Roberts
- Centre for Regenerative Medicine Research, School of Pharmacy and Bioengineering, Keele University, Keele, Staffordshire, United Kingdom
- Robert Jones and Agnes Hunt Orthopaedic Hospital, Oswestry, Shropshire, United Kingdom
| | - Kevin Norris
- TeloNostiX Ltd, Central Biotechnology Services, Cardiff, United Kingdom
| | - Duncan Baird
- TeloNostiX Ltd, Central Biotechnology Services, Cardiff, United Kingdom
- School of Medicine, Cardiff University, Cardiff, Wales, United Kingdom
| | - Larissa Rix
- Centre for Regenerative Medicine Research, School of Pharmacy and Bioengineering, Keele University, Keele, Staffordshire, United Kingdom
- Robert Jones and Agnes Hunt Orthopaedic Hospital, Oswestry, Shropshire, United Kingdom
| | - Robin Banerjee
- Robert Jones and Agnes Hunt Orthopaedic Hospital, Oswestry, Shropshire, United Kingdom
| | - Carl Meyer
- Robert Jones and Agnes Hunt Orthopaedic Hospital, Oswestry, Shropshire, United Kingdom
| | - Karina T. Wright
- Centre for Regenerative Medicine Research, School of Pharmacy and Bioengineering, Keele University, Keele, Staffordshire, United Kingdom
- Robert Jones and Agnes Hunt Orthopaedic Hospital, Oswestry, Shropshire, United Kingdom
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Abstract
Human induced pluripotent stem cells (iPSCs), since their discovery in 2007, have rapidly become a starting cell type of choice for the differentiation of many mature cell types. Their flexibility, amenability to gene editing and functional equivalence to embryonic stem cells ensured their subsequent adoption by many manufacturing processes for cellular products. In this chapter, we will discuss the process whereby iPSCs are generated, key quality control steps which should be considered during manufacturing, the application of good manufacturing practice to production processes and iPSC-derived cellular products which are already undergoing clinical trials. iPSCs provide a new avenue for the next generation of cellular therapeutics and by combining new differentiation protocols, quality control and reproducible manufacturing, iPSC-derived cellular products could provide treatments for many currently untreatable diseases, allowing the large-scale manufacture of high-quality cell therapies.
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Affiliation(s)
- Moyra Lawrence
- Centre for iPS Cell Research and Application (CiRA) and Institute for the Advanced Study of Human Biology (ASHBi), Kyoto University, Kyoto, Japan.
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Towards sustainability and affordability of expensive cell and gene therapies? Applying a cost-based pricing model to estimate prices for Libmeldy and Zolgensma. Cytotherapy 2022; 24:1245-1258. [PMID: 36216697 DOI: 10.1016/j.jcyt.2022.09.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 09/01/2022] [Accepted: 09/01/2022] [Indexed: 01/31/2023]
Abstract
BACKGROUND AIMS Drug prices are regarded as one of the most influential factors in determining accessibility and affordability to novel therapies. Cell and gene therapies such as OTL-200 (brand name: Libmeldy) and AVXS-101 (brand name: Zolgensma) with (expected) list prices of 3.0 million EUR and 1.9 million EUR per treatment, respectively, spark a global debate on the affordability of such therapies. The aim of this study was to use a recently published cost-based pricing model to calculate prices for cell and gene therapies, with OTL-200 and AVXS-101 as case study examples. METHODS Using the pricing model proposed by Uyl-de Groot and Löwenberg, we estimated a price for both therapies. We searched the literature and online public sources to estimate (i) research and development (R&D) expenses adjusted for risk of failure and cost of capital, (ii) the eligible patient population and (iii) costs of drug manufacturing to calculate a base-case price for OTL-200 and AVXS-101. All model input parameters were varied in a stepwise, deterministic sensitivity analysis and scenario analyses to assess their impact on the calculated prices. RESULTS Prices for OTL-200 and AVXS-101 were estimated at 1 048 138 EUR and 380 444 EUR per treatment, respectively. In deterministic sensitivity analyses, varying R&D estimates had the greatest impact on the price for OTL-200, whereas for AVXS-101, changes in the profit margin changed the calculated price substantially. Highest prices in scenario analyses were achieved when assuming the lowest number of patients for OTL-200 and highest R&D expenses for AVXS-101. The lowest R&D expenses scenario resulted in lowest prices for either therapy. CONCLUSIONS Our results show that, using the proposed model, prices for both OTL-200 and AVXS-101 lie substantially below the currently (proposed) list prices for both therapies. Nevertheless, the uncertainty of the used model input parameters is considerable, which translates in a wide range of estimated prices. This is mainly because of a lack of transparency from pharmaceutical companies regarding R&D expenses and the costs of drug manufacturing. Simultaneously, the disease indications for both therapies remain heavily understudied in terms of their epidemiological profile. Despite the considerable variation in the estimated prices, our results may support the public debate on value-based and cost-based pricing models, and on "fair" drug prices in general.
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Perspectives on the cost of goods for hPSC banks for manufacture of cell therapies. NPJ Regen Med 2022; 7:54. [PMID: 36175440 PMCID: PMC9522845 DOI: 10.1038/s41536-022-00242-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 08/05/2022] [Indexed: 11/08/2022] Open
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Cross N, van Steen C, Zegaoui Y, Satherley A, Angelillo L. Current and Future Treatment of Retinitis Pigmentosa. Clin Ophthalmol 2022; 16:2909-2921. [PMID: 36071725 PMCID: PMC9441588 DOI: 10.2147/opth.s370032] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Accepted: 07/14/2022] [Indexed: 12/16/2022] Open
Abstract
Retinitis Pigmentosa (RP) is a group of inherited retinal dystrophies (IRDs) characterised by progressive vision loss. Patients with RP experience a significant impact on daily activities, social interactions, and employment, reducing their quality of life. Frequent delays in referrals and no standard treatment for most patients also contribute to the high unmet need for RP. This paper aims to describe the evolving therapeutic landscape for RP including the rationale for advanced therapy medicinal products (ATMPs). A review of available data was conducted in three stages: (1) a search of publicly available literature; (2) qualitative research with physicians treating RP patients in France, Germany, Italy, Spain, and the UK; and (3) a review of leading candidates in the RP pipeline. Globally, there are currently over 100 drugs in development for RP; 50% of which are ATMPs. Amongst the 15 cell and gene therapies in late-stage development, 5 leading candidates have been selected to profile based on the development stage, drug target and geography: gene therapies AGN-151597, GS-030 and VMCO-1 and human stem cell therapies jCell and ReN-003. Hereditary retinal diseases are suitable for treatment with cell and gene therapies due to the accessibility of the retina and its immune privilege and compartmentalisation. Therapeutic approaches that aim to rescue photoreceptors (eg gene therapies) require that non-functional target cells are still present, whereas other therapies (eg cell therapies) are not reliant on the presence of viable photoreceptors. Gene therapies may be attractive as their fundamental goal is to restore vision; however, cell therapies will likely have a broader application and do not rely on genetic testing, which can delay treatment. Ensuring effective therapeutic options for RP patients across disease stages requires the continued diversification and advancement of the development pipeline, and sustained efforts to promote early patient identification and timely diagnosis.
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Affiliation(s)
| | - Cécile van Steen
- Market Access, Health Technology Assessment & Health Economics and Outcome Research, Europe, the Middle East and Africa, Santen GmbH, Munich, Bavaria, Germany
| | - Yasmina Zegaoui
- Market Access, Lightning Health, London, UK
- Correspondence: Yasmina Zegaoui, Market Access, Lightning Health, 8 Devonshire Square, London, EC2M 4PL, UK, Tel +44 7770918748, Email
| | | | - Luigi Angelillo
- Market Access, Health Technology Assessment & Health Economics and Outcome Research, Europe, the Middle East and Africa, Santen GmbH, Munich, Bavaria, Germany
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Lee E, Shah D, Porteus M, Wright JF, Bacchetta R. Design of experiments as a decision tool for cell therapy manufacturing. Cytotherapy 2022; 24:590-596. [PMID: 35227602 DOI: 10.1016/j.jcyt.2022.01.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 01/19/2022] [Accepted: 01/27/2022] [Indexed: 11/22/2022]
Abstract
BACKGROUND AIMS Cell therapies are costlier to manufacture than small molecules and protein therapeutics because they require multiple manipulations and are often produced in an autologous manner. Strategies to lower the cost of goods to produce a cell therapy could make a significant impact on its total cost. METHODS Borrowing from the field of bioprocess development, the authors took a design of experiments (DoE)-based approach to understanding the manufacture of a cell therapy product in pre-clinical development, analyzing main cost factors in the production process. The cells used for these studies were autologous CD4+ T lymphocytes gene-edited using CRISPR/Cas9 and recombinant adeno-associated virus (AAV) to restore normal FOXP3 gene expression as a prospective investigational product for patients with immune dysregulation, polyendocrinopathy, enteropathy, X-linked (IPEX) syndrome. RESULTS Using gene editing efficiency as the response variable, an initial screen was conducted for other variables that could influence the editing frequency. The multiplicity of infection (MOI) of AAV and amount of single guide RNA (sgRNA) were the significant factors used for the optimization step to generate a response contour plot. Cost analysis was done for multiple points in the design space to find cost drivers that could be reduced. For the range of values tested (50 000-750 000 vg/cell AAV and 0.8-4 μg sgRNA), editing with the highest MOI and sgRNA yielded the best gene editing frequency. However, cost analysis showed the optimal solution was gene editing at 193 000 vg/cell AAV and 1.78 μg sgRNA. CONCLUSIONS The authors used DoE to define key factors affecting the gene editing process for a potential investigational therapeutic, providing a novel and faster data-based approach to understanding factors driving complex biological processes. This approach could be applied in process development and aid in achieving more robust strategies for the manufacture of cellular therapeutics.
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Affiliation(s)
- Esmond Lee
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA.
| | | | - Matthew Porteus
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA; Division of Hematology, Oncology, Stem Cell Transplantation and Regenerative Medicine, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA, 94305, USA; Center for Definitive and Curative Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - J Fraser Wright
- Division of Hematology, Oncology, Stem Cell Transplantation and Regenerative Medicine, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA, 94305, USA; Center for Definitive and Curative Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Rosa Bacchetta
- Division of Hematology, Oncology, Stem Cell Transplantation and Regenerative Medicine, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA, 94305, USA; Center for Definitive and Curative Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA.
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Ajit A, Ambika Gopalankutty I. Adipose-derived stem cell secretome as a cell-free product for cutaneous wound healing. 3 Biotech 2021; 11:413. [PMID: 34476171 DOI: 10.1007/s13205-021-02958-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 08/04/2021] [Indexed: 12/17/2022] Open
Abstract
Chronic wounds continue to be a substantial public health concern contributing to both humanistic and economic burden worldwide. The magnitude of chronic wounds as a global healthcare crisis is likely to increase due to the rising geriatric and diabetic population, demanding novel therapeutic approaches that can restore the functionality of the skin at a reduced cost. Stem cell therapy has been widely acknowledged as a promising strategy for the repair of damaged tissues due to its regenerative potential. This potential attributes to a concoction of bioactive molecules secreted by the stem cells, collectively called the secretome, that mediates paracrine and autocrine functions. Among the stem cell types, adipose tissue-derived mesenchymal stem cells (ADMSCs) have been receiving increased attention for its ease of isolation, abundance in tissue and notable impact on improving chronic wound healing. Owing to the reported advantages of cell-free preparations like the secretome over cellular products, developing secretome as a ready-to-use product for wound healing applications seems promising. In this review, we discuss the functional benefits of adipose stem cell secretome in wound healing, the techniques to enrich the secretome and the recommendations for the scale-up and commercialization of secretome products.
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Affiliation(s)
- Amita Ajit
- Scientific Consultant and Life Member, Kerala Academy of Sciences, Sasthra Bhavan, Pattom, Thiruvananthapuram, 695004 Kerala India
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Stem Cells: Innovative Therapeutic Options for Neurodegenerative Diseases? Cells 2021; 10:cells10081992. [PMID: 34440761 PMCID: PMC8391848 DOI: 10.3390/cells10081992] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 08/01/2021] [Accepted: 08/03/2021] [Indexed: 12/13/2022] Open
Abstract
Neurodegenerative diseases are characterized by the progressive loss of structure and/or function of both neurons and glial cells, leading to different degrees of pathology and loss of cognition. The hypothesis of circuit reconstruction in the damaged brain via direct cell replacement has been pursued extensively so far. In this context, stem cells represent a useful option since they provide tissue restoration through the substitution of damaged neuronal cells with exogenous stem cells and create a neuro-protective environment through the release of bioactive molecules for healthy neurons, as well. These peculiar properties of stem cells are opening to potential therapeutic strategies for the treatment of severe neurodegenerative disorders, for which the absence of effective treatment options leads to an increasingly socio-economic burden. Currently, the introduction of new technologies in the field of stem cells and the implementation of alternative cell tissues sources are pointing to exciting frontiers in this area of research. Here, we provide an update of the current knowledge about source and administration routes of stem cells, and review light and shadows of cells replacement therapy for the treatment of the three main neurodegenerative disorders (Amyotrophic lateral sclerosis, Parkinson’s, and Alzheimer’s disease).
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