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Kandarakov OF, Polyakova NS, Petrovskaya AV, Bruter AV, Belyavsky AV. CD52/FLAG and CD52/HA Fusion Proteins as Novel Magnetic Cell Selection Markers. Int J Mol Sci 2024; 25:6353. [PMID: 38928060 PMCID: PMC11203882 DOI: 10.3390/ijms25126353] [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: 04/29/2024] [Revised: 06/03/2024] [Accepted: 06/05/2024] [Indexed: 06/28/2024] Open
Abstract
At present, the magnetic selection of genetically modified cells is mainly performed with surface markers naturally expressed by cells such as CD4, LNGFR (low affinity nerve growth factor receptor), and MHC class I molecule H-2Kk. The disadvantage of such markers is the possibility of their undesired and poorly predictable expression by unmodified cells before or after cell manipulation, which makes it essential to develop new surface markers that would not have such a drawback. Earlier, modified CD52 surface protein variants with embedded HA and FLAG epitope tags (CD52/FLAG and CD52/HA) were developed by the group of Dr. Mazurov for the fluorescent cell sorting of CRISPR-modified cells. In the current study, we tested whether these markers can be used for the magnetic selection of transduced cells. For this purpose, appropriate constructs were created in MigR1-based bicistronic retroviral vectors containing EGFP and DsRedExpress2 as fluorescent reporters. Cytometric analysis of the transduced NIH 3T3 cell populations after magnetic selection evaluated the efficiency of isolation and purity of the obtained populations, as well as the change in the median fluorescence intensity (MFI). The results of this study demonstrate that the surface markers CD52/FLAG and CD52/HA can be effectively used for magnetic cell selection, and their efficiencies are comparable to that of the commonly used LNGFR marker. At the same time, the significant advantage of these markers is the absence of HA and FLAG epitope sequences in cellular proteins, which rules out the spurious co-isolation of negative cells.
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Affiliation(s)
- Oleg F. Kandarakov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov Str. 32, 119991 Moscow, Russia; (O.F.K.); (N.S.P.); (A.V.P.)
| | - Natalia S. Polyakova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov Str. 32, 119991 Moscow, Russia; (O.F.K.); (N.S.P.); (A.V.P.)
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Vavilov Str. 32, 119991 Moscow, Russia;
| | - Alexandra V. Petrovskaya
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov Str. 32, 119991 Moscow, Russia; (O.F.K.); (N.S.P.); (A.V.P.)
| | - Alexandra V. Bruter
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Vavilov Str. 32, 119991 Moscow, Russia;
- Institute of Gene Biology, Russian Academy of Sciences, Vavilov Str. 34/5, 119334 Moscow, Russia
| | - Alexander V. Belyavsky
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov Str. 32, 119991 Moscow, Russia; (O.F.K.); (N.S.P.); (A.V.P.)
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2
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Mun S, Lee HJ, Kim P. Rebuilding the microenvironment of primary tumors in humans: a focus on stroma. Exp Mol Med 2024; 56:527-548. [PMID: 38443595 PMCID: PMC10984944 DOI: 10.1038/s12276-024-01191-5] [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: 08/31/2023] [Revised: 12/05/2023] [Accepted: 12/29/2023] [Indexed: 03/07/2024] Open
Abstract
Conventional tumor models have critical shortcomings in that they lack the complexity of the human stroma. The heterogeneous stroma is a central compartment of the tumor microenvironment (TME) that must be addressed in cancer research and precision medicine. To fully model the human tumor stroma, the deconstruction and reconstruction of tumor tissues have been suggested as new approaches for in vitro tumor modeling. In this review, we summarize the heterogeneity of tumor-associated stromal cells and general deconstruction approaches used to isolate patient-specific stromal cells from tumor tissue; we also address the effect of the deconstruction procedure on the characteristics of primary cells. Finally, perspectives on the future of reconstructed tumor models are discussed, with an emphasis on the essential prerequisites for developing authentic humanized tumor models.
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Affiliation(s)
- Siwon Mun
- Department of Bio and Brain Engineering, KAIST, Daejeon, 34141, South Korea
| | - Hyun Jin Lee
- Department of Bio and Brain Engineering, KAIST, Daejeon, 34141, South Korea
| | - Pilnam Kim
- Department of Bio and Brain Engineering, KAIST, Daejeon, 34141, South Korea.
- Institute for Health Science and Technology, KAIST, Daejeon, 34141, South Korea.
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Li CY, Liang Z, Liu L, Kuang Y. Intracellular Molecules Induced Extracellular Peptide Self-Assembly for Efficient and Effective In Situ Cell Purification. Angew Chem Int Ed Engl 2023; 62:e202306533. [PMID: 37483172 DOI: 10.1002/anie.202306533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 07/18/2023] [Accepted: 07/21/2023] [Indexed: 07/25/2023]
Abstract
Synthetic messenger RNA (mRNA) switches are powerful tools for in situ cell purification, especially for cells derived from stem cells. However, the retention effectiveness of the target cells is limited by the leaky expression of toxic protein. The elimination efficiency of non-target cells is also constrained due to the lack of signal amplification. In this study, we designed a novel approach that uses synthetic mRNA switch to convey intracellular marker molecule information into spatially controlled extracellular toxic assembly formation. The approach bypasses the use of toxic protein to ensure high target cell recovery effectiveness. Meanwhile, the marker molecule information is amplified at multiple levels to ensure high non-target cell elimination effectiveness. Our approach can be tailored to meet various in situ cell purification needs, promising high-quality in situ cell purification for a wide range of biomedical applications.
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Affiliation(s)
- Cheuk Yin Li
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, Hong Kong
| | - Zhenghua Liang
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, Hong Kong
| | - Lejian Liu
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, Hong Kong
| | - Yi Kuang
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, Hong Kong
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4
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Sindeeva OA, Demina PA, Kozyreva ZV, Muslimov AR, Gusliakova OI, Laushkina VO, Mordovina EA, Tsyupka D, Epifanovskaya OS, Sapach AY, Goryacheva IY, Sukhorukov GB. Labeling and Tracking of Individual Human Mesenchymal Stromal Cells Using Photoconvertible Fluorescent Microcapsules. Int J Mol Sci 2023; 24:13665. [PMID: 37686471 PMCID: PMC10488098 DOI: 10.3390/ijms241713665] [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: 07/23/2023] [Revised: 08/28/2023] [Accepted: 08/31/2023] [Indexed: 09/10/2023] Open
Abstract
The behavior and migration of human mesenchymal stromal cells (hMSCs) are focal points of research in the biomedical field. One of the major aspects is potential therapy using hMCS, but at present, the safety of their use is still controversial owing to limited data on changes that occur with hMSCs in the long term. Fluorescent photoconvertible proteins are intensively used today as "gold standard" to mark the individual cells and study single-cell interactions, migration processes, and the formation of pure lines. A crucial disadvantage of this method is the need for genetic modification of the primary culture, which casts doubt on the possibility of exploring the resulting clones in personalized medicine. Here we present a new approach for labeling and tracking hMSCs without genetic modification based on the application of cell-internalizable photoconvertible polyelectrolyte microcapsules (size: 2.6 ± 0.5 μm). These capsules were loaded with rhodamine B, and after thermal treatment, exhibited fluorescent photoconversion properties. Photoconvertible capsules demonstrated low cytotoxicity, did not affect the immunophenotype of the hMSCs, and maintained a high level of fluorescent signal for at least seven days. The developed approach was tested for cell tracking for four days and made it possible to trace the destiny of daughter cells without the need for additional labeling.
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Affiliation(s)
- Olga A. Sindeeva
- Vladimir Zelman Center for Neurobiology and Brain Rehabilitation, Skolkovo Institute of Science and Technology, Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, 121205 Moscow, Russia; (Z.V.K.); (O.I.G.); (A.Y.S.); (I.Y.G.)
| | - Polina A. Demina
- Science Medical Center, Saratov State University, 83 Astrakhanskaya Str., 410012 Saratov, Russia; (P.A.D.); (E.A.M.); (D.T.)
| | - Zhanna V. Kozyreva
- Vladimir Zelman Center for Neurobiology and Brain Rehabilitation, Skolkovo Institute of Science and Technology, Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, 121205 Moscow, Russia; (Z.V.K.); (O.I.G.); (A.Y.S.); (I.Y.G.)
| | - Albert R. Muslimov
- Scientific Center for Translational Medicine, Sirius University of Science and Technology, 1 Olympic Ave., 354340 Sirius, Russia;
- Laboratory of Nano and Microencapsulation of Biologically Active Substances, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, 195251 St. Petersburg, Russia
- RM Gorbacheva Research Institute, Pavlov University, L’va Tolstogo 6-8, 197022 St. Petersburg, Russia; (V.O.L.); (O.S.E.)
| | - Olga I. Gusliakova
- Vladimir Zelman Center for Neurobiology and Brain Rehabilitation, Skolkovo Institute of Science and Technology, Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, 121205 Moscow, Russia; (Z.V.K.); (O.I.G.); (A.Y.S.); (I.Y.G.)
- Science Medical Center, Saratov State University, 83 Astrakhanskaya Str., 410012 Saratov, Russia; (P.A.D.); (E.A.M.); (D.T.)
| | - Valeriia O. Laushkina
- RM Gorbacheva Research Institute, Pavlov University, L’va Tolstogo 6-8, 197022 St. Petersburg, Russia; (V.O.L.); (O.S.E.)
| | - Ekaterina A. Mordovina
- Science Medical Center, Saratov State University, 83 Astrakhanskaya Str., 410012 Saratov, Russia; (P.A.D.); (E.A.M.); (D.T.)
| | - Daria Tsyupka
- Science Medical Center, Saratov State University, 83 Astrakhanskaya Str., 410012 Saratov, Russia; (P.A.D.); (E.A.M.); (D.T.)
| | - Olga S. Epifanovskaya
- RM Gorbacheva Research Institute, Pavlov University, L’va Tolstogo 6-8, 197022 St. Petersburg, Russia; (V.O.L.); (O.S.E.)
| | - Anastasiia Yu. Sapach
- Vladimir Zelman Center for Neurobiology and Brain Rehabilitation, Skolkovo Institute of Science and Technology, Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, 121205 Moscow, Russia; (Z.V.K.); (O.I.G.); (A.Y.S.); (I.Y.G.)
| | - Irina Yu. Goryacheva
- Vladimir Zelman Center for Neurobiology and Brain Rehabilitation, Skolkovo Institute of Science and Technology, Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, 121205 Moscow, Russia; (Z.V.K.); (O.I.G.); (A.Y.S.); (I.Y.G.)
- Science Medical Center, Saratov State University, 83 Astrakhanskaya Str., 410012 Saratov, Russia; (P.A.D.); (E.A.M.); (D.T.)
| | - Gleb B. Sukhorukov
- Vladimir Zelman Center for Neurobiology and Brain Rehabilitation, Skolkovo Institute of Science and Technology, Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, 121205 Moscow, Russia; (Z.V.K.); (O.I.G.); (A.Y.S.); (I.Y.G.)
- School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, UK
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Polyakova N, Kandarakov O, Belyavsky A. Selection of Cell Populations with High or Low Surface Marker Expression Using Magnetic Sorting. Cells 2023; 12:cells12091286. [PMID: 37174686 PMCID: PMC10177026 DOI: 10.3390/cells12091286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 04/23/2023] [Accepted: 04/27/2023] [Indexed: 05/15/2023] Open
Abstract
Magnetic cell sorting technology stands out because of its speed, simplicity, and ability to process large cell numbers. However, it also suffers from a number of drawbacks, in particular low discrimination power, which results in all-or-none selection outcomes limited to a bulk separation of cell populations into positive and negative fractions, as well as the modest purity of the selected cells and the inability to select subpopulations of cells with high expression of a surface marker. In the present study, we developed a simple solution to this problem and confirmed the effectiveness of this approach by multiple experiments with the magnetic selection of transduced cell populations. Murine NIH 3T3 cells were transduced with the bicistronic retroviral vector constructs co-expressing fluorescent reporter proteins EGFP (enhanced green fluorescent protein) or DsRed-Express 2 and LNGFR (low-affinity nerve growth factor receptor) as surface selection markers. The effects of the magnetic selection of transduced cells with anti-LNGFR Micro Bead (MB) doses ranging from 0.5 to 80 µL have been assessed. Low doses of MBs favored the depletion of weakly positive cells from the population, resulting in the higher expression levels of EGFP or DsRed-Express2 reporters in the selected cell fractions. Low MB doses also contributed to the increased purity of the selected population, even for samples with a low initial percentage of positive cells. At the same time, high MB doses resulted in the increased yield and a more faithful representation of the original expression profiles following selection. We further demonstrate that for populations with fairly narrow distribution of expression levels, it is possible to achieve separation into high- and low-expressing subsets using the two-stage selection scheme based on the sequential use of low and high doses of MBs. For populations with broad expression distribution, a one-stage selection with low or high doses of MBs is sufficient for a clear separation of low- and high-expressing subsets in the column-retained and flow-through fractions, respectively. This study substantially extends the potential of magnetic cell sorting, and may open new possibilities in a number of biomedical applications.
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Affiliation(s)
- Natalia Polyakova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia
| | - Oleg Kandarakov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia
| | - Alexander Belyavsky
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Butlerova 5A, Moscow 117485, Russia
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Larid G, Delwail A, Dalle T, Vasseur P, Silvain C, Jégou JF, Morel F, Lecron JC, Gervais E. Ex vivo cytokine production in psoriatic disease: Towards specific signatures in cutaneous psoriasis and peripheral psoriatic arthritis. Front Immunol 2022; 13:993363. [PMID: 36426370 PMCID: PMC9678922 DOI: 10.3389/fimmu.2022.993363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 10/10/2022] [Indexed: 11/11/2022] Open
Abstract
Objectives Psoriatic arthritis (PsA) and cutaneous psoriasis (PsO) are different phenotypes of psoriatic disease (PsD), whose underlying specific mechanisms remain incompletely understood. As cytokines are key elements to induce and tune up immune responses to drive inflammatory diseases, our objective was to assess whether clinical features, disease phenotype and PsA and PsO activity were associated with a particular ex vivo cytokine production profile. Methods Forty-eight patients (37 PsA and 11 PsO) and 11 healthy subjects (HS) were studied. Cytokine production by peripheral blood mononuclear cells (PBMC) that were either unstimulated, or stimulated with LPS or anti-CD3/CD28 antibodies, were analysed by multiplex assay in the culture supernatants. Results Cytokine signature of PsD includes a high level of TNFα in supernatants of LPS-stimulated PBMC, higher levels of IL-6 and lower levels of IFN-γ and IL-17A after CD3-CD28 stimulation, as well as higher spontaneous IL-1RA and TNFα production compared to HS. High body mass index (BMI) was associated with lower levels of IL-1β, and metabolic syndrome with lower levels of IFN-γ after LPS stimulation. In PsD, dermatological activity was related with higher IL-17A level, while rheumatic activity was linked with lower levels of IFN-γ and TNFα. Comparing each PsD subtype to HS, IL-1β and IL-6 productions are higher when using LPS stimulation in PsO patients with higher levels of IL-1β and IL-1α in peripheral PsA patients after CD3/CD28 stimulation. LPS stimulation induced high levels of IL-17A in peripheral PsA compared to axial PsA. PsA patients with axial PsA share some features with PsO but shows a distinct cytokine pattern compared to peripheral PsA. Conclusion PsO and the different PsA subtypes exhibit distinct ex vivo cytokine production profiles and common features of the so-called PsD. Analysis of IL-1 cytokine family and IL-6 seems to be of particular interest to distinguish PsO and peripheral PsA since it depends on monocytes in PsO and T-lymphocytes in peripheral PsA. Peripheral cytokine profiles are influenced by rheumatic and dermatological activity of the disease, and also by metabolic syndrome features. Our results highlight the crucial role of immune cell interactions with different patterns of interaction depending on clinical phenotype.
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Affiliation(s)
- Guillaume Larid
- Rheumatology Department, CHU de Poitiers, Poitiers, France
- University of Poitiers, LITEC, Poitiers, France
| | | | | | - Philippe Vasseur
- University of Poitiers, LITEC, Poitiers, France
- Gastroenterology Department, CHU de Poitiers, Poitiers, France
| | - Christine Silvain
- University of Poitiers, LITEC, Poitiers, France
- Gastroenterology Department, CHU de Poitiers, Poitiers, France
| | | | | | - Jean-Claude Lecron
- University of Poitiers, LITEC, Poitiers, France
- Immunology-Inflammation Laboratory, CHU de Poitiers, Poitiers, France
| | - Elisabeth Gervais
- Rheumatology Department, CHU de Poitiers, Poitiers, France
- University of Poitiers, LITEC, Poitiers, France
- *Correspondence: Elisabeth Gervais,
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Abstract
Magnetic cell separation has become a key methodology for the isolation of target cell populations from biological suspensions, covering a wide spectrum of applications from diagnosis and therapy in biomedicine to environmental applications or fundamental research in biology. There now exists a great variety of commercially available separation instruments and reagents, which has permitted rapid dissemination of the technology. However, there is still an increasing demand for new tools and protocols which provide improved selectivity, yield and sensitivity of the separation process while reducing cost and providing a faster response. This review aims to introduce basic principles of magnetic cell separation for the neophyte, while giving an overview of recent research in the field, from the development of new cell labeling strategies to the design of integrated microfluidic cell sorters and of point-of-care platforms combining cell selection, capture, and downstream detection. Finally, we focus on clinical, industrial and environmental applications where magnetic cell separation strategies are amongst the most promising techniques to address the challenges of isolating rare cells.
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Salaris F, Rosa A. Construction of 3D in vitro models by bioprinting human pluripotent stem cells: Challenges and opportunities. Brain Res 2019; 1723:146393. [PMID: 31425681 DOI: 10.1016/j.brainres.2019.146393] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 07/11/2019] [Accepted: 08/14/2019] [Indexed: 12/26/2022]
Abstract
Three-dimensional (3D) printing of biological material, or 3D bioprinting, is a rapidly expanding field with interesting applications in tissue engineering and regenerative medicine. Bioprinters use cells and biocompatible materials as an ink (bioink) to build 3D structures representative of organs and tissues, in a controlled manner and with micrometric resolution. Human embryonic (hESCs) and induced (hiPSCs) pluripotent stem cells are ideally able to provide all cell types found in the human body. A limited, but growing, number of recent reports suggest that cells derived by differentiation of hESCs and hiPSCs can be used as building blocks in bioprinted human 3D models, reproducing the cellular variety and cytoarchitecture of real tissues. In this review we will illustrate these examples, which include hepatic, cardiac, vascular, corneal and cartilage tissues, and discuss challenges and opportunities of bioprinting more demanding cell types, such as neurons, obtained from human pluripotent stem cells.
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Affiliation(s)
- Federico Salaris
- Department of Biology and Biotechnology Charles Darwin, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy; Center for Life Nano Science, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00161 Rome, Italy
| | - Alessandro Rosa
- Department of Biology and Biotechnology Charles Darwin, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy; Center for Life Nano Science, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00161 Rome, Italy.
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Poubelle PE, Pagé N, Longchamps MP, Sampaio Moura N, Beck DB, Aksentijevich I, Tessier PA, Pelletier M. The use of leukocytes' secretome to individually target biological therapy in autoimmune arthritis: a case report. Clin Transl Med 2019; 8:19. [PMID: 31165299 PMCID: PMC6548783 DOI: 10.1186/s40169-019-0236-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 04/24/2019] [Indexed: 02/07/2023] Open
Abstract
Background Biological agents have allowed remarkable improvement in controlling autoimmune arthropathies, although none of the numerous biologics readily available represent a universal treatment standard. Moreover, classical and genetic predictors are currently unsatisfactory to predict individual response to a biologic, and the best treatment selection is still based on a trial-and-error approach. Here, we report a clinical case demonstrating the usefulness of examining the leukocytes’ secretome of patients. We set up and standardized a protocol that examines a patient’s immune responses to establish the secretome of the blood mononuclear leukocytes and personalize the biotherapy. Case presentation A 24-year-old woman was diagnosed with active early rheumatoid arthritis. The initial treatment regimen (prednisone, methotrexate, hydroxychloroquine, naproxen) was inefficient, as well as the anti-TNF adalimumab. The diagnosis was revised as possible rheumatoid arthritis-like psoriatic arthritis and adalimumab was replaced by abatacept (IgG1 Fc-CTLA-4) to no avail. Five years later, abatacept was replaced by the anti-IL-12/IL-23 ustekinumab with no objective control over the symptoms. The patient was thus enrolled in a prospective study based on the quantification of cytokines secreted by peripheral blood leukocytes stimulated with well-known immune activators of pattern recognition receptors and cytokine signalling. The results of this study revealed that plasma concentrations of cytokines were similar between the patient and healthy donors. In comparison to leukocytes from healthy donors, the patient’s secretome showed a unique overproduction of IL-6. The anti-IL-6 receptor tocilizumab was, therefore, administered with a rapid improvement of her active psoriatic arthritis that remained dependent on low prednisone dosage. Clinical parameters progressively returned to normal levels and her quality of life was greatly improved, despite the major delay to begin the present personalized treatment. Conclusions An efficient way to effectively treat patients with complex autoimmune arthropathies, and avoid irreversible disability, is to know their leukocytes’ secretome to identify abnormally secreted cytokines and personalize their biotherapy, as exemplified by this case report.
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Affiliation(s)
- Patrice E Poubelle
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, Room T1-49, 2705 Boul. Laurier, Québec, QC, G1V 4G2, Canada. .,Département de médecine, Faculté de Médecine, Université Laval, Québec, QC, G1V 0A6, Canada.
| | - Nathalie Pagé
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, Room T1-49, 2705 Boul. Laurier, Québec, QC, G1V 4G2, Canada
| | - Marie-Pier Longchamps
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, Room T1-49, 2705 Boul. Laurier, Québec, QC, G1V 4G2, Canada
| | - Natalia Sampaio Moura
- Metabolic, Cardiovascular and Inflammatory Disease Genomics Branch, National Human Genome Research Institute, National Institutes of Health, 10 Center Drive, Building 10, Room B3-4129, Bethesda, MD, 20892-1852, USA
| | - David B Beck
- Metabolic, Cardiovascular and Inflammatory Disease Genomics Branch, National Human Genome Research Institute, National Institutes of Health, 10 Center Drive, Building 10, Room B3-4129, Bethesda, MD, 20892-1852, USA
| | - Ivona Aksentijevich
- Metabolic, Cardiovascular and Inflammatory Disease Genomics Branch, National Human Genome Research Institute, National Institutes of Health, 10 Center Drive, Building 10, Room B2-5235, Bethesda, MD, 20892-1852, USA
| | - Philippe A Tessier
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, Room T1-49, 2705 Boul. Laurier, Québec, QC, G1V 4G2, Canada.,Département de microbiologie-infectiologie et d'immunologie, Faculté de Médecine, Université Laval, Québec, QC, G1V 0A6, Canada
| | - Martin Pelletier
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, Room T1-49, 2705 Boul. Laurier, Québec, QC, G1V 4G2, Canada. .,Département de microbiologie-infectiologie et d'immunologie, Faculté de Médecine, Université Laval, Québec, QC, G1V 0A6, Canada.
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10
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Avetisov SE, Erichev VP, Fyodorov AA, Yaremenko TV, Murakhovskaya YK. [Evaluation of therapeutic sensitivity of retinal ganglion cells to targeted peptide bioregulator in culture]. Vestn Oftalmol 2019; 135:84-89. [PMID: 30830079 DOI: 10.17116/oftalma201913501184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
PURPOSE To study how therapeutically sensitive retinal cell culture is to the peptide bioregulator isolated from cattle retina (Retinalamin) in models of glaucomatous optic neuropathy (GON). MATERIAL AND METHODS The cells were isolated from the retinae separated from newborn mice. Cell sheets were disaggregated and transformed into a suspension. Removal of the off-target cell population was done by adding antibodies to deplete the cells with CD48 marker, and magnetic microbeads that attach to them. Selection of ganglion cells and obtainment of its enriched fraction was done by immunomagnetic separation. To assess the toxicity of Retinalamin, a cytotoxic test was performed on the culture of skin fibroblasts with sequential dilution of the drug into concentrations of 5.0-0.009 mg/mL. The cells were seeded at 5000 per plate well and exposed to the drug for 24 hours. To study the excitotoxic damage, the first group of plate wells with retinal cells had solution of sodium glutamate added in concentration of 20 mM, Retinalamin was added into the second group of wells in concentration of 1.25 mg/mL; both substances were added into the third group of wells. The control group consisted of intact plate wells. The cells were exposed to substances for 24 hours. Cell vitality was then evaluated using colorimetry. Optic density was measured using an automatic photometer with detection wavelength of λ=490 nm. RESULTS The cell culture achieved by immunomagnetic separation is mixed and consists of ganglion and glial cells. Retinalamin does not display significant cytotoxicity in any of the studied concentrations. The excitotoxic damage caused significant decrease of the amount of viable cells in the culture (9% of the control wells). The concomitant addition of glutamate and 1.25 mg/mL Retinalamin resulted in a 51.6% increase in the amount of viable cells. The intergroup differences were statistically significant by Student's t-test. CONCLUSION Retinalamin is not cytotoxic. The concomitant addition of glutamate and Retinalamin reliably decreases the toxic action of glutamate on isolated retinal cells.
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Affiliation(s)
- S E Avetisov
- Research Institute of Eye Diseases, 11A Rossolimo St., Moscow, Russian Federation, 119021; I.M. Sechenov First Moscow State Medical University, Department of Ophthalmology, 8-2 Trubetskaya St., Moscow, Russian Federation, 119991
| | - V P Erichev
- Research Institute of Eye Diseases, 11A Rossolimo St., Moscow, Russian Federation, 119021
| | - A A Fyodorov
- Research Institute of Eye Diseases, 11A Rossolimo St., Moscow, Russian Federation, 119021
| | - T V Yaremenko
- I.M. Sechenov First Moscow State Medical University, Department of Ophthalmology, 8-2 Trubetskaya St., Moscow, Russian Federation, 119991
| | - Yu K Murakhovskaya
- I.M. Sechenov First Moscow State Medical University, Department of Ophthalmology, 8-2 Trubetskaya St., Moscow, Russian Federation, 119991
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11
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Hayashi Y, Matsumoto J, Kumagai S, Morishita K, Xiang L, Kobori Y, Hori S, Suzuki M, Kanamori T, Hotta K, Sumaru K. Automated adherent cell elimination by a high-speed laser mediated by a light-responsive polymer. Commun Biol 2018; 1:218. [PMID: 30534610 PMCID: PMC6286311 DOI: 10.1038/s42003-018-0222-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 11/10/2018] [Indexed: 11/25/2022] Open
Abstract
Conventional cell handling and sorting methods require manual labor, which decreases both cell quality and quantity. To purify adherent cultured cells, cell purification technologies that are high throughput without dissociation and can be utilized in an on-demand manner are expected. Here, we developed a Laser-induced, Light-responsive-polymer-Activated, Cell Killing (LiLACK) system that enables high-speed and on-demand adherent cell sectioning and purification. This system employs a visible laser beam, which does not kill cells directly, but induces local heat production through the trans-cis-trans photo-isomerization of azobenzene moieties. Using this system in each passage for sectioning, human induced pluripotent stem cells (hiPSCs) maintained their pluripotency and self-renewal during long-term culture. Furthermore, combined with deep machine-learning analysis on fluorescent and phase contrast images, a label-free and automatic cell processing system has been developed by eliminating unwanted spontaneously differentiated cells in undifferentiated hiPSC culture conditions. Yohei Hayashi et al. present a method for high-speed adherent cell sectioning and purification, along with a label-free and automatic cell processing system. They show that this method is able to section human induced pluripotent stem cells without losing pluripotency and viability.
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Affiliation(s)
- Yohei Hayashi
- iPS Cell Advanced Characterization and Development Team, RIKEN Bioresource Research Center, 3-1-1 Koyadai, Tsukuba, Ibaraki 305-0074 Japan
| | - Junichi Matsumoto
- Kataoka Corporation, 140 Tsukiyama-cho, Kuze, Minami-ku, Kyoto 601-8203 Japan
| | - Shohei Kumagai
- 3Meijo University, 1-501 Shiogamaguchi, Tenpaku, Nagoya 468-8502 Japan
| | - Kana Morishita
- 4Biotechnology Research Institute for Drug Discovery, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5th, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565 Japan
| | - Long Xiang
- iPS Portal, Inc., 448-5 Kajii-cho, Kamigyo-ku, Kyoto 602-0841 Japan
| | - Yohei Kobori
- iPS Portal, Inc., 448-5 Kajii-cho, Kamigyo-ku, Kyoto 602-0841 Japan
| | - Seiji Hori
- iPS Portal, Inc., 448-5 Kajii-cho, Kamigyo-ku, Kyoto 602-0841 Japan
| | - Masami Suzuki
- Kataoka Corporation, 140 Tsukiyama-cho, Kuze, Minami-ku, Kyoto 601-8203 Japan
| | - Toshiyuki Kanamori
- 4Biotechnology Research Institute for Drug Discovery, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5th, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565 Japan
| | - Kazuhiro Hotta
- 3Meijo University, 1-501 Shiogamaguchi, Tenpaku, Nagoya 468-8502 Japan
| | - Kimio Sumaru
- 4Biotechnology Research Institute for Drug Discovery, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5th, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565 Japan
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12
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Matula TJ, Sapozhnikov OA, Ostrovsky LA, Brayman AA, Kucewicz J, MacConaghy BE, De Raad D. Ultrasound-based cell sorting with microbubbles: A feasibility study. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2018; 144:41. [PMID: 30075653 PMCID: PMC6029934 DOI: 10.1121/1.5044405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 06/05/2018] [Accepted: 06/08/2018] [Indexed: 06/08/2023]
Abstract
The isolation and sorting of cells is an important process in research and hospital labs. Most large research and commercial labs incorporate fluorescently or magnetically labeled antibodies adherent to cell surface antigens for cell identification and separation. In this paper, a process is described that merges biochemical labeling with ultrasound-based separation. Instead of lasers and fluorophore tags, or magnets and magnetic particle tags, the technique uses ultrasound and microbubble tags. Streptavidin-labeled microbubbles were mixed with a human acute lymphoblastic leukemia cell line, CCL 119, conjugated with biotinylated anti-CD7 antibodies. Tagged cells were forced under ultrasound, and their displacement and velocity quantified. Differential displacement in a flow stream was quantified against erythrocytes, which showed almost no displacement under ultrasound. A model for the acoustic radiation force on the conjugated pairs compares favorably with observations. This technology may improve on current time-consuming and costly purification procedures.
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Affiliation(s)
- Thomas J Matula
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, Seattle, Washington 98105, USA
| | - Oleg A Sapozhnikov
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, Seattle, Washington 98105, USA
| | - Lev A Ostrovsky
- Department of Applied Mathematics, University of Colorado, Boulder, Colorado 80309, USA
| | - Andrew A Brayman
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, Seattle, Washington 98105, USA
| | - John Kucewicz
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, Seattle, Washington 98105, USA
| | - Brian E MacConaghy
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, Seattle, Washington 98105, USA
| | - Dino De Raad
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, Seattle, Washington 98105, USA
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13
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Zimmermann S, Gretzinger S, Zimmermann PK, Bogsnes A, Hansson M, Hubbuch J. Cell Separation in Aqueous Two-Phase Systems - Influence of Polymer Molecular Weight and Tie-Line Length on the Resolution of Five Model Cell Lines. Biotechnol J 2017; 13. [PMID: 29087627 DOI: 10.1002/biot.201700250] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 10/16/2017] [Indexed: 12/29/2022]
Abstract
The availability of clinical-scale downstream processing strategies for cell-based products presents a critical juncture between basic research and clinical development. Aqueous two-phase systems (ATPS) facilitate the label-free, scalable, and cost-effective separation of cells, and are a versatile tool for downstream processing of cell-based therapeutics. Here, we report the application of a previously developed robotic screening platform, here extended to enable a multiplexed high-throughput cell partitioning analysis in ATPS. We investigated the influence of polymer molecular weight and tie-line length on the resolution of five model cell lines in "charge-sensitive" polyethylene-glycol (PEG)-dextran ATPS. We show, how these factors influence cell partitioning, and that the combination of low molecular weight PEGs and high molecular weight dextrans enable the highest resolution of the five cell lines. Furthermore, we demonstrate that the separability of each cell line from the mixture is highly dependent on the polymer molecular weight composition and tie-line length. Using a countercurrent distribution model we demonstrate that our screenings yielded conditions that theoretically enable the isolation of four of the five cell lines with high purity (>99.9%) and yield.
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Affiliation(s)
- Sarah Zimmermann
- Institute of Engineering in Life Sciences, Section IV: Biomolecular Separation Engineering, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Sarah Gretzinger
- Institute of Engineering in Life Sciences, Section IV: Biomolecular Separation Engineering, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany.,Institute of Functional Interfaces (IFG), Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany
| | - Philipp K Zimmermann
- Institute of Engineering in Life Sciences, Section IV: Biomolecular Separation Engineering, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Are Bogsnes
- Biopharm Purification Development & Virology, Novo Nordisk A/SGentofte, Denmark
| | - Mattias Hansson
- Dr. M. Hansson, Diabetes Research, Novo Nordisk A/S, Måløv, Denmark
| | - Jürgen Hubbuch
- Institute of Engineering in Life Sciences, Section IV: Biomolecular Separation Engineering, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
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14
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Dong Z, Ahrens CC, Yu D, Ding Z, Lim H, Li W. Cell Isolation and Recovery Using Hollow Glass Microspheres Coated with Nanolayered Films for Applications in Resource-Limited Settings. ACS APPLIED MATERIALS & INTERFACES 2017; 9:15265-15273. [PMID: 28414907 DOI: 10.1021/acsami.7b02197] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Established cell isolation and purification techniques such as fluorescence-activated cell sorting (FACS), isolation through magnetic micro/nanoparticles, and recovery via microfluidic devices have limited application as disposable technologies appropriate for point-of-care use in remote areas where lab equipment as well as electrical, magnetic, and optical sources are restricted. We report a simple yet effective method for cell isolation and recovery that requires neither specialized lab equipment nor any form of power source. Specifically, self-floating hollow glass microspheres were coated with an enzymatically degradable nanolayered film and conjugated with antibodies to allow both fast capture and release of subpopulations of cells from a cell mixture. Targeted cells were captured by the microspheres and allowed to float to the top of the hosting liquid, thereby isolating targeted cells. To minimize nonspecific adhesion of untargeted cells and to enhance the purity of the isolated cell population, an antifouling polymer brush layer was grafted onto the nanolayered film. Using the EpCAM-expressing cancer cell line PC-3 in blood as a model system, we have demonstrated the isolation and recovery of cancer cells without compromising cell viability or proliferative potential. The whole process takes less than 1 h. To support the rational extension of this platform technology, we introduce extensive characterization of the critical design parameters: film formation and degradation, grafting with a poly(ethylene glycol) (PEG) sheath, and introducing functional antibodies. Our approach is expected to overcome practical hurdles and provide viable targeted cells for downstream analyses in resource-limited settings.
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Affiliation(s)
- Ziye Dong
- Department of Chemical Engineering, Texas Tech University , Lubbock, Texas 79409, United States
| | - Caroline C Ahrens
- Department of Chemical Engineering, Texas Tech University , Lubbock, Texas 79409, United States
| | - Dan Yu
- Department of Critical Care Medicine, People's Hospital of Zhengzhou University Zhengzhou, China 450003
| | - Zhenya Ding
- Department of Chemical Engineering, Texas Tech University , Lubbock, Texas 79409, United States
| | - HyunTaek Lim
- Department of Chemical Engineering, Texas Tech University , Lubbock, Texas 79409, United States
| | - Wei Li
- Department of Chemical Engineering, Texas Tech University , Lubbock, Texas 79409, United States
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15
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Zimmermann S, Scheeder C, Zimmermann PK, Bogsnes A, Hansson M, Staby A, Hubbuch J. High-throughput downstream process development for cell-based products using aqueous two-phase systems (ATPS) - A case study. Biotechnol J 2016; 12. [PMID: 27883271 DOI: 10.1002/biot.201600587] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 11/19/2016] [Accepted: 11/23/2016] [Indexed: 01/27/2023]
Abstract
The availability of preparative-scale downstream processing strategies for cell-based products presents a critical juncture between fundamental research and clinical development. Aqueous two-phase systems (ATPS) present a gentle, scalable, label-free, and cost-effective method for cell purification, and are thus a promising tool for downstream processing of cell-based therapeutics. Here, the application of a previously developed robotic screening platform that enables high-throughput cell partitioning analysis in ATPS is reported. In the present case study a purification strategy for two model cell lines based on high-throughput screening (HTS)-data and countercurrent distribution (CCD)-modeling, and validated the CCD-model experimentally is designed. The obtained data are shown an excellent congruence between CCD-model and experimental data, indicating that CCD-models in combination with HTS-data are a powerful tool in downstream process development. Finally, the authors are shown that while cell cycle phase significantly influences cell partitioning, cell type specific differences in surface properties are the main driving force in charge-dependent separation of HL-60 and L929 cells. In order to design a highly robust purification process it is, however, advisable to maintain constant growth conditions.
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Affiliation(s)
- Sarah Zimmermann
- Karlsruhe Institute of Technology (KIT), Institute of Process Engineering in Life Science, Section IV: Biomolecular Separation Engineering (MAB), Karlsruhe, Germany
| | - Christian Scheeder
- Karlsruhe Institute of Technology (KIT), Institute of Process Engineering in Life Science, Section IV: Biomolecular Separation Engineering (MAB), Karlsruhe, Germany
| | - Philipp K Zimmermann
- Karlsruhe Institute of Technology (KIT), Institute of Process Engineering in Life Science, Section IV: Biomolecular Separation Engineering (MAB), Karlsruhe, Germany
| | - Are Bogsnes
- Novo Nordisk A/S, Biopharm Purification Development & Virology, Gentofte, Denmark
| | | | - Arne Staby
- Novo Nordisk A/S, CMC Project Planning & Management, Bagsvaerd, Denmark
| | - Jürgen Hubbuch
- Karlsruhe Institute of Technology (KIT), Institute of Process Engineering in Life Science, Section IV: Biomolecular Separation Engineering (MAB), Karlsruhe, Germany
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16
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High-throughput downstream process development for cell-based products using aqueous two-phase systems. J Chromatogr A 2016; 1464:1-11. [PMID: 27567679 DOI: 10.1016/j.chroma.2016.08.025] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 08/09/2016] [Accepted: 08/10/2016] [Indexed: 01/28/2023]
Abstract
As the clinical development of cell-based therapeutics has evolved immensely within the past years, downstream processing strategies become more relevant than ever. Aqueous two-phase systems (ATPS) enable the label-free, scalable, and cost-effective separation of cells, making them a promising tool for downstream processing of cell-based therapeutics. Here, we report the development of an automated robotic screening that enables high-throughput cell partitioning analysis in ATPS. We demonstrate that this setup enables fast and systematic investigation of factors influencing cell partitioning. Moreover, we examined and optimized separation conditions for the differentiable promyelocytic cell line HL-60 and used a counter-current distribution-model to investigate optimal separation conditions for a multi-stage purification process. Finally, we show that the separation of CD11b-positive and CD11b-negative HL-60 cells is possible after partial DMSO-mediated differentiation towards the granulocytic lineage. The modeling data indicate that complete peak separation is possible with 30 transfers, and >93% of CD11b-positive HL-60 cells can be recovered with >99% purity. The here described screening platform facilitates faster, cheaper, and more directed downstream process development for cell-based therapeutics and presents a powerful tool for translational research.
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17
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Rahmanian N, Bozorgmehr M, Torabi M, Akbari A, Zarnani AH. Cell separation: Potentials and pitfalls. Prep Biochem Biotechnol 2016; 47:38-51. [PMID: 27045194 DOI: 10.1080/10826068.2016.1163579] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Cell separation techniques play an indispensable part in numerous basic biological studies and even clinical settings. Although various cell isolation methods with diverse applications have been devised so far, not all of them have been able to gain widespread popularity among researchers and clinicians. There is not a single method known to be advantageous over all cell isolation techniques, and in fact, it is the researcher's aim in performing a study that determines the most suitable method. A perfect method for one study might not be necessarily a proper choice for another and likewise, expensive and complex isolation methods might not always be the best choices. There are several criteria such as cell purity, viability, activation status, and frequency that need to be given serious thought before selecting an isolation technique. Moreover, time and cost are two of the key elements that should be taken into consideration before implementing a project. Hence, here we provide a succinct description of six more popular cell separation methods with respect to their principles, advantages, and disadvantages as well as their most common applications. We further provide several key features of each technique so that it helps the researchers to take the first step toward opting for the best method that fits well into their projects.
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Affiliation(s)
- Narges Rahmanian
- a Department of Molecular Medicine, School of Advanced Technologies in Medicine , Tehran University of Medical Sciences , Tehran , Iran
| | - Mohmood Bozorgmehr
- b Oncopathology Research Center , Iran University of Medical Sciences , Tehran , Iran
| | - Monir Torabi
- c Department of Pathology, Shariati Hospital , Tehran University of Medical Sciences , Tehran , Iran
| | - Abolfazl Akbari
- d Colorectal Research Center , Iran University of Medical Sciences , Tehran , Iran
| | - Amir-Hassan Zarnani
- e Department of Immunology , School of Public Health, Tehran University of Medical Sciences , Tehran , Iran.,f Immunology Research Center , Iran University of Medical Sciences , Tehran , Iran
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18
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Rasouli M, Abbasi S, Sarsaifi K, Hani H, Ahmad Z, Omar AR. The L-cell isolation from heterogonous population of intestinal cell line using antibiotic selection method. Appl Biochem Biotechnol 2013; 172:394-404. [PMID: 24081707 DOI: 10.1007/s12010-013-0514-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Accepted: 09/15/2013] [Indexed: 11/30/2022]
Abstract
Enteroendocrine cells are the largest population of hormone-producing cells in the body and play important roles in many aspects of body functions. The enteroendocrine cell population is divided into different subpopulations that secrete different hormones and peptides. Characterization of each subpopulation is particularly useful for analyzing the cellular mechanisms responsible for specific cell types. Therefore, the necessity of a pure cell line for a specific study purpose was the important motivation for the separation of cell lines for each subpopulation of enteroendocrine cells. The present research introduces a method for the isolation of L-cells, one of the important subpopulations of enteroendocrine cells. The antibiotic selection method was conducted in order to isolate the L-cells from a heterogonous population of intestinal cell line. In this method, a neomycin resistance gene (as selected marker) was expressed under the control of a specific promoter of L-cells. After transfection of manipulated plasmid, only the cells which determine the specific promoter and express neomycin resistance protein would be able to survive under Geneticin antibiotic treatment condition. In order to confirm that the isolated cells were L-cells, reverse transcriptase polymerase chain reaction (PCR) and quantitative PCR assays were performed. Based on the results, the isolated cells were pure L-cells that could be able to express specific mRNA of L-cells efficiently. This technique provides a unique method for the isolation and purification of any cell line. The purified isolated L-cells by this method can be used for future studies and for analyzing cellular mechanisms that involve L-cells' functions.
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Affiliation(s)
- Mina Rasouli
- Laboratory of Vaccines and Immunotherapeutics, Institute of Bioscience, Universiti Putra Malaysia, UPM Serdang, 43400, Serdang, Selangor, Malaysia,
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Abstract
Regenerative Medicine (RM) has the promise to revolutionize the treatment of many debilitating diseases for which the current therapies are inadequate. To realize the full potential of RM, a pragmatic approach needs to be taken by all stakeholders keeping in mind the lessons learnt from recombinant protein manufacturing, gene therapy trials, etc., to develop novel service delivery models for economic viability and regulatory processes in the absence of long-term data. In this chapter, we focus on the three main drivers of RM field and discuss the potential pitfalls and possible ways to mitigate them in order to move the field closer to clinical implementation.
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20
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Ahmad Z, Rasouli M, Azman AZF, Omar AR. Evaluation of insulin expression and secretion in genetically engineered gut K and L-cells. BMC Biotechnol 2012; 12:64. [PMID: 22989329 PMCID: PMC3469342 DOI: 10.1186/1472-6750-12-64] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2012] [Accepted: 09/17/2012] [Indexed: 12/25/2022] Open
Abstract
Background Gene therapy could provide an effective treatment of diabetes. Previous studies have investigated the potential for several cell and tissue types to produce mature and active insulin. Gut K and L-cells could be potential candidate hosts for gene therapy because of their special features. Results In this study, we isolated gut K and L-cells to compare the potential of both cell types to produce insulin when exposed to similar conditions. The isolated pure K and L-cells were transfected with recombinant plasmids encoding insulin and with specific promoters for K or L-cells. Insulin expression was studied in response to glucose or meat hydrolysate. We found that glucose and meat hydrolysate efficiently induced insulin secretion from K and L-cells. However, the effects of meat hydrolysate on insulin secretion were more potent in both cells compared with glucose. Results of enzyme-linked immunosorbent assays showed that L-cells secreted more insulin compared with K-cells regardless of the stimulator, although this difference was not statistically significant. Conclusion The responses of K and L-cells to stimulation with glucose or meat hydrolysate were generally comparable. Therefore, both K and L-cells show similar potential to be used as surrogate cells for insulin gene expression in vitro. The potential use of these cells for diabetic gene therapy warrants further investigation.
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Affiliation(s)
- Zalinah Ahmad
- Laboratory of Vaccines and Immunotherapeutics, Institute of Bioscience, Universiti Putra Malaysia, UPM Serdang, Selangor 43400, Malaysia.
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