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Burns JS. The Evolving Landscape of Potency Assays. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2023; 1420:165-189. [PMID: 37258790 DOI: 10.1007/978-3-031-30040-0_11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
There is a "goldilocks" aspect to potency assays. On the one hand, a comprehensive evaluation of the cell product with detailed quantitative measurement of the critical quality attribute/s of the desired biological activity is required. On the other hand, the potency assay benefits from simplification and lean approaches that avoid unnecessary complication and enhance robustness, to provide a reproducible and scalable product. There is a need to balance insightful knowledge of complex biological healing processes with straightforward manufacture of an advanced therapeutic medicinal product (ATMP) that can be administered in a trustworthy cost-effective manner. While earlier chapters within this book have highlighted numerous challenges facing the potency assay conundrum, this chapter offers a forward-looking perspective regarding the many recent advances concerning acellular products, cryopreservation, induced MSC, cell priming, nanotechnology, 3D culture, regulatory guidelines and evolving institutional roles, that are likely to facilitate potency assay development in the future.
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Affiliation(s)
- Jorge S Burns
- Department of Environmental and Prevention Sciences, University of Ferrara, Ferrara, Italy.
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Chinnadurai R. Advanced Technologies for Potency Assay Measurement. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2023; 1420:81-95. [PMID: 37258785 DOI: 10.1007/978-3-031-30040-0_6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Crucial for their application, cell products need to be well-characterized in the cell manufacturing facilities and conform to regulatory approval criteria before infusion into the patients. Mesenchymal Stromal Cells (MSCs) are the leading cell therapy candidate in clinical trials worldwide. Early phase clinical trials have demonstrated that MSCs display an excellent safety profile and are well tolerated. However, MSCs have also exhibited contradictory efficacy in later-phase clinical trials with reasons for this discrepancy including poorly understood mechanism of MSC therapeutic action. With likelihood that a number of attributes are involved in MSC derived clinical benefit, an assay that measures a single quality of may not adequately reflect potency, thus a combination of bioassays and analytical methods, collectively called "assay matrix" are favoured for defining the potency of MSC more adequately. This chapter highlights advanced technologies and targets that can achieve quantitative measurement for a range of MSC attributes, including immunological, genomic, secretome, phosphorylation, morphological, biomaterial, angiogenic and metabolic assays.
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Affiliation(s)
- Raghavan Chinnadurai
- Department of Biomedical Sciences, Mercer University School of Medicine, Savannah, GA, USA.
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Papamatthaiou S, Moschou D. Innovative Quantification of Critical Quality Attributes. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2023; 1420:97-115. [PMID: 37258786 DOI: 10.1007/978-3-031-30040-0_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Potency testing is an important part of the evaluation of cellular therapy products. In vitro quantification of identified quality-related biomarkers is a technique often used at the laboratory. Nonetheless, the limited stability of most cellular therapy products, the lot variability and the limited time within which to perform testing are currently hindering their widespread use. Fortunately, within the last two decades, the evolution of material technology and miniaturisation processes has enabled the research community to shift the spotlight of attention towards the Lab-on-Chip concept for diagnostic applications. Such devices enable portable, rapid, sensitive, automated and affordable biochemical analyses aiming to advance the healthcare services across a broad application spectrum. However, it could be argued that the aspirations on their affordability are far from being exceeded, mainly due to the lack of a practical manufacturing technology. The Lab-on-Printed Circuit Board (Lab-on-PCB) approach has demonstrated enormous potential for developing economical diagnostic platforms leveraging the advantage provided by economy of scale manufacturing of the long-standing PCB industry. The integration capabilities that the PCB platform introduces to the Lab-on-Chip concept concerning the electronics and microfluidics seem to be unique. In this chapter, we will be reviewing the progress of Lab-on-PCB prototypes quantifying within miniaturised microchips a range of critical quality attributes with potential in potency testing. We will focus on their technology and applications whilst addressing the potential of this approach in practical use and commercialisation.
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Affiliation(s)
- Sotirios Papamatthaiou
- Centre for Biosensors, Bioelectronics and Biodevices (ToC3Bio) and Department of Electronic & Electrical Engineering, University of Bath, Bath, UK
| | - Despina Moschou
- Centre for Biosensors, Bioelectronics and Biodevices (ToC3Bio) and Department of Electronic & Electrical Engineering, University of Bath, Bath, UK.
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Raghav PK, Mann Z, Ahlawat S, Mohanty S. Mesenchymal stem cell-based nanoparticles and scaffolds in regenerative medicine. Eur J Pharmacol 2021; 918:174657. [PMID: 34871557 DOI: 10.1016/j.ejphar.2021.174657] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 11/05/2021] [Accepted: 11/24/2021] [Indexed: 12/20/2022]
Abstract
Mesenchymal stem cells (MSCs) are adult stem cells owing to their regenerative potential and multilineage potency. MSCs have wide-scale applications either in their native cellular form or in conjugation with specific biomaterials as nanocomposites. Majorly, these natural or synthetic biomaterials are being used in the form of metallic and non-metallic nanoparticles (NPs) to encapsulate MSCs within hydrogels like alginate or chitosan or drug cargo loading into MSCs. In contrast, nanofibers of polymer scaffolds such as polycaprolactone (PCL), poly-lactic-co-glycolic acid (PLGA), poly-L-lactic acid (PLLA), silk fibroin, collagen, chitosan, alginate, hyaluronic acid (HA), and cellulose are used to support or grow MSCs directly on it. These MSCs based nanotherapies have application in multiple domains of biomedicine including wound healing, bone and cartilage engineering, cardiac disorders, and neurological disorders. This study focused on current approaches of MSCs-based therapies and has been divided into two major sections. The first section elaborates on MSC-based nano-therapies and their plausible applications including exosome engineering and NPs encapsulation. The following section focuses on the various MSC-based scaffold approaches in tissue engineering. Conclusively, this review mainly focused on MSC-based nanocomposite's current approaches and compared their advantages and limitations for building effective regenerative medicines.
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Affiliation(s)
- Pawan Kumar Raghav
- Stem Cell Facility, DBT Centre of Excellence for Stem Cell Research, All India Institute of Medical Sciences, New Delhi, 110029, India.
| | - Zoya Mann
- Stem Cell Facility, DBT Centre of Excellence for Stem Cell Research, All India Institute of Medical Sciences, New Delhi, 110029, India.
| | - Swati Ahlawat
- Stem Cell Facility, DBT Centre of Excellence for Stem Cell Research, All India Institute of Medical Sciences, New Delhi, 110029, India.
| | - Sujata Mohanty
- Stem Cell Facility, DBT Centre of Excellence for Stem Cell Research, All India Institute of Medical Sciences, New Delhi, 110029, India.
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Ofiteru AM, Becheru DF, Gharbia S, Balta C, Herman H, Mladin B, Ionita M, Hermenean A, Burns JS. Qualifying Osteogenic Potency Assay Metrics for Human Multipotent Stromal Cells: TGF-β2 a Telling Eligible Biomarker. Cells 2020; 9:E2559. [PMID: 33260388 PMCID: PMC7760953 DOI: 10.3390/cells9122559] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/18/2020] [Accepted: 11/24/2020] [Indexed: 02/06/2023] Open
Abstract
Potency assays are critical for regenerative medicine, addressing the known challenge of functional heterogeneity among human multipotent stromal cells (hMSC). Necessary laboratory cell expansion allows analysis before implantation in the patient. Levels of induction of five signature gene biomarkers, ALPL, COL1A2, DCN, ELN and RUNX2, constituted a previously reported proof-of-principle osteogenic potency assay. We tested assay modification to enhance reproducibility using six consistent bone marrow derived hBM-MSC and explored applicability to three adipose tissue derived hAT-MSC. Using a potent proprietary osteogenic induction factor, the GUSB/YWAHZ reference gene pair provided real time PCR consistency. The novel assay conditions supported the concept that genes encoding extracellular matrix proteins one week after osteogenic induction were informative. Nonetheless, relatively low induction of COL1A2 and ELN encouraged search for additional biomarkers. TGFB2 mRNA induction, important for osteogenic commitment, was readily quantifiable in both hBM-MSC and hAT-MSC. Combined with DCN, TGFB2 mRNA induction data provided discriminatory power for resolving donor-specific heterogeneity. Histomorphometric decorin and TGF-β2 protein expression patterns in eight-week heterotopic bone implants also discriminated the two non-bone-forming hMSC. We highlight progress towards prompt osteogenic potency assays, needed by current clinical trials to accelerate improved intervention with enhanced stem cell therapy for serious bone fractures.
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Affiliation(s)
- Augustin M. Ofiteru
- Faculty of Medical Engineering, University Politehnica of Bucharest, Gh Polizu 1-7, 011061 Bucharest, Romania; (D.F.B.); (M.I.)
| | - Diana F. Becheru
- Faculty of Medical Engineering, University Politehnica of Bucharest, Gh Polizu 1-7, 011061 Bucharest, Romania; (D.F.B.); (M.I.)
- Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Gh Polizu 1-7, 011061 Bucharest, Romania
| | - Sami Gharbia
- “Aurel Ardelean” Institute of Life Sciences, Vasile Goldis Western University of Arad, 86 Rebreanu, 310414 Arad, Romania; (S.G.); (C.B.); (H.H.); (B.M.); (A.H.)
| | - Cornel Balta
- “Aurel Ardelean” Institute of Life Sciences, Vasile Goldis Western University of Arad, 86 Rebreanu, 310414 Arad, Romania; (S.G.); (C.B.); (H.H.); (B.M.); (A.H.)
| | - Hildegard Herman
- “Aurel Ardelean” Institute of Life Sciences, Vasile Goldis Western University of Arad, 86 Rebreanu, 310414 Arad, Romania; (S.G.); (C.B.); (H.H.); (B.M.); (A.H.)
| | - Bianca Mladin
- “Aurel Ardelean” Institute of Life Sciences, Vasile Goldis Western University of Arad, 86 Rebreanu, 310414 Arad, Romania; (S.G.); (C.B.); (H.H.); (B.M.); (A.H.)
| | - Mariana Ionita
- Faculty of Medical Engineering, University Politehnica of Bucharest, Gh Polizu 1-7, 011061 Bucharest, Romania; (D.F.B.); (M.I.)
| | - Anca Hermenean
- “Aurel Ardelean” Institute of Life Sciences, Vasile Goldis Western University of Arad, 86 Rebreanu, 310414 Arad, Romania; (S.G.); (C.B.); (H.H.); (B.M.); (A.H.)
| | - Jorge S. Burns
- Faculty of Medical Engineering, University Politehnica of Bucharest, Gh Polizu 1-7, 011061 Bucharest, Romania; (D.F.B.); (M.I.)
- Department of Life Sciences and Biotechnology, University of Ferrara, 44121 Ferrara, Italy
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Patel DK, Seo YR, Lim KT. Stimuli-Responsive Graphene Nanohybrids for Biomedical Applications. Stem Cells Int 2019; 2019:9831853. [PMID: 31065286 PMCID: PMC6466862 DOI: 10.1155/2019/9831853] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 12/14/2018] [Accepted: 01/17/2019] [Indexed: 12/14/2022] Open
Abstract
Stimuli-responsive materials, also known as smart materials, can change their structure and, consequently, original behavior in response to external or internal stimuli. This is due to the change in the interactions between the various functional groups. Graphene, which is a single layer of carbon atoms with a hexagonal morphology and has excellent physiochemical properties with a high surface area, is frequently used in materials science for various applications. Numerous surface functionalizations are possible for the graphene structure with different functional groups, which can be used to alter the properties of native materials. Graphene-based hybrids exhibit significant improvements in their native properties. Since functionalized graphene contains several reactive groups, the behavior of such hybrid materials can be easily tuned by changing the external conditions, which is very useful in biomedical applications. Enhanced cell proliferation and differentiation of stem cells was reported on the surfaces of graphene-based hybrids with negligible cytotoxicity. In addition, pH or light-induced drug delivery with a controlled release rate was observed for such nanohybrids. Besides, notable improvements in antimicrobial activity were observed for nanohybrids, which demonstrated their potential for biomedical applications. This review describes the physiochemical properties of graphene and graphene-based hybrid materials for stimuli-responsive drug delivery, tissue engineering, and antimicrobial applications.
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Affiliation(s)
- Dinesh K. Patel
- The Institute of Forest Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Yu-Ri Seo
- Department of Biosystems Engineering, College of Agriculture and Life Sciences, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Ki-Taek Lim
- The Institute of Forest Science, Kangwon National University, Chuncheon 24341, Republic of Korea
- Department of Biosystems Engineering, College of Agriculture and Life Sciences, Kangwon National University, Chuncheon 24341, Republic of Korea
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Optical Graphene-Based Biosensor for Nucleic Acid Detection; Influence of Graphene Functionalization and Ionic Strength. Int J Mol Sci 2018; 19:ijms19103230. [PMID: 30347651 PMCID: PMC6214132 DOI: 10.3390/ijms19103230] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 10/15/2018] [Accepted: 10/16/2018] [Indexed: 02/07/2023] Open
Abstract
A main challenge for optical graphene-based biosensors detecting nucleic acid is the selection of key parameters e.g. graphenic chemical structure, nanomaterial dispersion, ionic strength, and appropriate molecular interaction mechanisms. Herein we study interactions between a fluorescein-labelled DNA (FAM-DNA) probe and target single-stranded complementary DNA (cDNA) on three graphenic species, aiming to determine the most suitable platform for nucleic acid detection. Graphene oxide (GO), carboxyl graphene (GO-COOH) and reduced graphene oxide functionalized with PEGylated amino groups (rGO-PEG-NH2, PEG (polyethylene glycol)) were dispersed and characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The influence of ionic strength on molecular interaction with DNA was examined by fluorescence resonance energy transfer (FRET) comparing fluorescence intensity and anisotropy. Results indicated an effect of graphene functionalization, dispersion and concentration-dependent quenching, with GO and GO-COOH having the highest quenching abilities for FAM-DNA. Furthermore, GO and GO-COOH quenching was accentuated by the addition of either MgCl2 or MgSO4 cations. At 10 mM MgCl2 or MgSO4, the cDNA induced a decrease in fluorescence signal that was 2.7-fold for GO, 3.4-fold for GO-COOH and 4.1-fold for rGO-PEG-NH2. Best results, allowing accurate target detection, were observed when selecting rGO-PEG-NH2, MgCl2 and fluorescence anisotropy as an advantageous combination suitable for nucleic acid detection and further rational design biosensor development.
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