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Tordai C, Hathy E, Gyergyák H, Vincze K, Baradits M, Koller J, Póti Á, Jezsó B, Homolya L, Molnár MJ, Nagy L, Szüts D, Apáti Á, Réthelyi JM. Probing the biological consequences of a previously undescribed de novo mutation of ZMYND11 in a schizophrenia patient by CRISPR genome editing and induced pluripotent stem cell based in vitro disease-modeling. Schizophr Res 2024:S0920-9964(24)00024-0. [PMID: 38290943 DOI: 10.1016/j.schres.2024.01.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 01/10/2024] [Accepted: 01/11/2024] [Indexed: 02/01/2024]
Abstract
BACKGROUND Schizophrenia (SCZ) is a severe neuropsychiatric disorder of complex, poorly understood etiology, associated with both genetic and environmental factors. De novo mutations (DNMs) represent a new source of genetic variation in SCZ, however, in most cases their biological significance remains unclear. We sought to investigate molecular disease pathways connected to DNMs in SCZ by combining human induced pluripotent stem cell (hiPSC) based disease modeling and CRISPR-based genome editing. METHODS We selected a SCZ case-parent trio with the case individual carrying a potentially disease causing 1495C > T nonsense DNM in the zinc finger MYND domain-containing protein 11 (ZMYND11), a gene implicated in biological processes relevant for SCZ. In the patient-derived hiPSC line the mutation was corrected using CRISPR, while monoallelic or biallelic frameshift mutations were introduced into a control hiPSC line. Isogenic cell lines were differentiated into hippocampal neuronal progenitor cells (NPCs) and functionally active dentate gyrus granule cells (DGGCs). Immunofluorescence microscopy and RNA sequencing were used to test for morphological and transcriptomic differences at NPC and DGCC stages. Functionality of neurons was investigated using calcium-imaging and multi-electrode array measurements. RESULTS Morphology in the mutant hippocampal NPCs and neurons was preserved, however, we detected significant transcriptomic and functional alterations. RNA sequencing showed massive upregulation of neuronal differentiation genes, and downregulation of cell adhesion genes. Decreased reactivity to glutamate was demonstrated by calcium-imaging. CONCLUSIONS Our findings lend support to the involvement of glutamatergic dysregulation in the pathogenesis of SCZ. This approach represents a powerful model system for precision psychiatry and pharmacological research.
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Affiliation(s)
- Csongor Tordai
- Institute of Molecular Life Sciences, Research Center for Natural Sciences, 1117 Budapest, Magyar tudósok körútja 2, Budapest, Hungary; Molecular Psychiatry Research Group, Semmelweis University, 1083 Budapest, Balassa utca 6, Budapest, Hungary
| | - Edit Hathy
- Molecular Psychiatry Research Group, Semmelweis University, 1083 Budapest, Balassa utca 6, Budapest, Hungary
| | - Hella Gyergyák
- Institute of Molecular Life Sciences, Research Center for Natural Sciences, 1117 Budapest, Magyar tudósok körútja 2, Budapest, Hungary
| | - Katalin Vincze
- Institute of Molecular Life Sciences, Research Center for Natural Sciences, 1117 Budapest, Magyar tudósok körútja 2, Budapest, Hungary; Molecular Psychiatry Research Group, Semmelweis University, 1083 Budapest, Balassa utca 6, Budapest, Hungary
| | - Máté Baradits
- Molecular Psychiatry Research Group, Semmelweis University, 1083 Budapest, Balassa utca 6, Budapest, Hungary; Department of Psychiatry and Psychotherapy, Semmelweis University, 1083 Budapest, Balassa utca 6, Budapest, Hungary
| | - Júlia Koller
- Molecular Psychiatry Research Group, Semmelweis University, 1083 Budapest, Balassa utca 6, Budapest, Hungary; Institute of Genomic Medicine and Rare Disorders, Semmelweis University, 1083 Budapest, Balassa utca 6, Budapest, Hungary
| | - Ádám Póti
- Institute of Molecular Life Sciences, Research Center for Natural Sciences, 1117 Budapest, Magyar tudósok körútja 2, Budapest, Hungary
| | - Bálint Jezsó
- Institute of Molecular Life Sciences, Research Center for Natural Sciences, 1117 Budapest, Magyar tudósok körútja 2, Budapest, Hungary; Doctoral School of Biology and Institute of Biology, Eötvös Loránd University, 1117 Budapest, Pázmány Péter sétány 1/c, Budapest, Hungary
| | - László Homolya
- Institute of Molecular Life Sciences, Research Center for Natural Sciences, 1117 Budapest, Magyar tudósok körútja 2, Budapest, Hungary
| | - Mária Judit Molnár
- Institute of Genomic Medicine and Rare Disorders, Semmelweis University, 1083 Budapest, Balassa utca 6, Budapest, Hungary
| | - László Nagy
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Egyetem tér 1, Debrecen, Hungary
| | - Dávid Szüts
- Institute of Molecular Life Sciences, Research Center for Natural Sciences, 1117 Budapest, Magyar tudósok körútja 2, Budapest, Hungary.
| | - Ágota Apáti
- Institute of Molecular Life Sciences, Research Center for Natural Sciences, 1117 Budapest, Magyar tudósok körútja 2, Budapest, Hungary.
| | - János M Réthelyi
- Molecular Psychiatry Research Group, Semmelweis University, 1083 Budapest, Balassa utca 6, Budapest, Hungary; Department of Psychiatry and Psychotherapy, Semmelweis University, 1083 Budapest, Balassa utca 6, Budapest, Hungary.
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Minic S, Florimond M, Sadoine J, Valot-Salengro A, Chaussain C, Renard E, Boukpessi T. Evaluation of Pulp Repair after Biodentine TM Full Pulpotomy in a Rat Molar Model of Pulpitis. Biomedicines 2021; 9:biomedicines9070784. [PMID: 34356848 PMCID: PMC8301331 DOI: 10.3390/biomedicines9070784] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 07/01/2021] [Accepted: 07/02/2021] [Indexed: 12/14/2022] Open
Abstract
Dental pulp is a dynamic tissue able to heal after injury under moderate inflammatory conditions. Our study aimed to evaluate pulp repair under inflammatory conditions in rats. For this purpose, we developed a rat model of controlled pulpitis followed by pulpotomy with a tricalcium silicate-based cement. Fifty-four cavities were prepared on the occlusal face of the maxillary upper first molar of 27 eight-week-old male rats. E. coli lipopolysaccharides at 10 mg/mL or phosphate-buffered saline PBS was injected after pulp injury. Non-inflamed molars were used as controls. Levels of inflammation-related molecules were measured 6 and 24 h after induction by enzyme-linked immunosorbent assay of coronal pulp samples. Pulp capping and coronal obturation after pulpotomy were performed with tricalcium silicate-based cement. Four and fifteen days after pulpotomy, histological and immunohistochemical analysis was performed to assess pulp inflammation and repair processes. Our results showed significantly higher levels of innate inflammatory proteins (IL-1β, IL-6, TNF-α and CXCL-1) compared with those in controls. Moderate residual inflammation near the capping material was demonstrated by histology and immunohistochemistry, with the presence of few CD68-positive cells. We showed that, in this model of controlled pulpitis, pulpotomy with BiodentineTM allowed the synthesis at the injury site of a mineralized bridge formed from mineralized tissue secreted by cells displaying odontoblastic characteristics. Analysis of these data suggests overall that, with the limitations inherent to findings in animal models, pulpotomy with a silicate-based cement is a good treatment for controlling inflammation and enhancing repair in cases of controlled pulpitis.
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Affiliation(s)
- Sandra Minic
- Laboratory of Orofacial Pathologies, Imaging and Biotherapies, School of Dentistry, Laboratoire d’excellence INFLAMEX, Université de Paris, URP 2496, 1 Rue Maurice Arnoux, 92120 Montrouge, France; (S.M.); (M.F.); (J.S.); (C.C.)
| | - Marion Florimond
- Laboratory of Orofacial Pathologies, Imaging and Biotherapies, School of Dentistry, Laboratoire d’excellence INFLAMEX, Université de Paris, URP 2496, 1 Rue Maurice Arnoux, 92120 Montrouge, France; (S.M.); (M.F.); (J.S.); (C.C.)
- AP-HP Department of Dental Medicine, Charles Foix and Bretonneau Hospitals, and Reference Center for Rare Diseases of Calcium and Phosphorus Metabolism, 7 Avenue de la République, 94200 Ivry-sur-Seine, France
| | - Jérémy Sadoine
- Laboratory of Orofacial Pathologies, Imaging and Biotherapies, School of Dentistry, Laboratoire d’excellence INFLAMEX, Université de Paris, URP 2496, 1 Rue Maurice Arnoux, 92120 Montrouge, France; (S.M.); (M.F.); (J.S.); (C.C.)
| | | | - Catherine Chaussain
- Laboratory of Orofacial Pathologies, Imaging and Biotherapies, School of Dentistry, Laboratoire d’excellence INFLAMEX, Université de Paris, URP 2496, 1 Rue Maurice Arnoux, 92120 Montrouge, France; (S.M.); (M.F.); (J.S.); (C.C.)
- AP-HP Department of Dental Medicine, Charles Foix and Bretonneau Hospitals, and Reference Center for Rare Diseases of Calcium and Phosphorus Metabolism, 7 Avenue de la République, 94200 Ivry-sur-Seine, France
| | - Emmanuelle Renard
- Inserm, UMR 1229, RMeS, Regenerative Medicine and Skeleton, Université de Nantes, ONIRIS, 1 Place Alexis Ricordeau, 44000 Nantes, France
- CHU de Nantes, Service d’Odontologie Restauratrice et Chirurgicale, 1 Place Alexis Ricordeau, 44000 Nantes, France
- Correspondence: (E.R.); (T.B.); Tel.: +33-2-40-41-29-86 (E.R.); +33-1-58-07-67-24 (T.B.)
| | - Tchilalo Boukpessi
- Laboratory of Orofacial Pathologies, Imaging and Biotherapies, School of Dentistry, Laboratoire d’excellence INFLAMEX, Université de Paris, URP 2496, 1 Rue Maurice Arnoux, 92120 Montrouge, France; (S.M.); (M.F.); (J.S.); (C.C.)
- AP-HP Department of Dental Medicine, Charles Foix and Bretonneau Hospitals, and Reference Center for Rare Diseases of Calcium and Phosphorus Metabolism, 7 Avenue de la République, 94200 Ivry-sur-Seine, France
- Correspondence: (E.R.); (T.B.); Tel.: +33-2-40-41-29-86 (E.R.); +33-1-58-07-67-24 (T.B.)
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Generation of Human Neural Progenitors from Blood Samples by Interrupted Reprogramming. Methods Mol Biol 2021; 2454:241-255. [PMID: 33826126 DOI: 10.1007/7651_2021_386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Human neuronal cell cultures are essential tools for biological and preclinical studies of our nervous system. Since we have very limited access to primary human neural samples, derivation of proliferative neural progenitor cells (NPCs) from cells harvested by minimally invasive sampling is a key issue. Here we describe a "shortcut" method to establish proliferative NPC cultures directly from peripheral blood mononuclear cells (PBMCs) via interrupted reprogramming. In addition, we provide procedures to characterize the NPC stage.
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Rathinam E, Govindarajan S, Rajasekharan S, Declercq H, Elewaut D, De Coster P, Martens L, Leybaert L. The calcium dynamics of human dental pulp stem cells stimulated with tricalcium silicate-based cements determine their differentiation and mineralization outcome. Sci Rep 2021; 11:645. [PMID: 33436827 PMCID: PMC7804324 DOI: 10.1038/s41598-020-80096-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 12/03/2020] [Indexed: 12/19/2022] Open
Abstract
Calcium (Ca2+) signalling plays an indispensable role in dental pulp and dentin regeneration, but the Ca2+ responses of human dental pulp stem cells (hDPSCs) stimulated with tricalcium silicate-based (TCS-based) dental biomaterials remains largely unexplored. The objective of the present study was to identify and correlate extracellular Ca2+ concentration, intracellular Ca2+ dynamics, pH, cytotoxicity, gene expression and mineralization ability of human dental pulp stem cells (hDPSCs) stimulated with two different TCS-based biomaterials: Biodentine and ProRoot white MTA. The hDPSCs were exposed to the biomaterials, brought in contact with the overlaying medium, with subsequent measurements of extracellular Ca2+ and pH, and intracellular Ca2+ changes. Messenger RNA expression (BGLAP, TGF-β, MMP1 and BMP2), cytotoxicity (MTT and TUNEL) and mineralization potential (Alizarin red and Von Kossa staining) were then evaluated. Biodentine released significantly more Ca2+ in the α-MEM medium than ProRoot WMTA but this had no cytotoxic impact on hDPSCs. The larger Biodentine-linked Ca2+ release resulted in altered intracellular Ca2+ dynamics, which attained a higher maximum amplitude, faster rise time and increased area under the curve of the Ca2+ changes compared to ProRoot WMTA. Experiments with intracellular Ca2+ chelation, demonstrated that the biomaterial-triggered Ca2+ dynamics affected stem cell-related gene expression, cellular differentiation and mineralization potential. In conclusion, biomaterial-specific Ca2+ dynamics in hDPSCs determine differentiation and mineralization outcomes, with increased Ca2+ dynamics enhancing mineralization.
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Affiliation(s)
- Elanagai Rathinam
- Department of Paediatric Dentistry and Special Care, PAECOMEDIS Research Cluster, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium.
| | - Srinath Govindarajan
- Department of Internal Medicine and Paediatrics, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium.,Unit for Molecular Immunology and Inflammation, VIB-Center for Inflammation Research, Technologiepark 71, 9052, Zwijnaarde, Ghent, Belgium
| | - Sivaprakash Rajasekharan
- Department of Paediatric Dentistry and Special Care, PAECOMEDIS Research Cluster, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium
| | - Heidi Declercq
- Tissue Engineering and Biomaterials Group, Department of Human Structure and Repair, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium.,Tissue Engineering Lab, Department of Development and Regeneration, KU Leuven, 8500, Kortrijk, Belgium
| | - Dirk Elewaut
- Department of Internal Medicine and Paediatrics, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium.,Unit for Molecular Immunology and Inflammation, VIB-Center for Inflammation Research, Technologiepark 71, 9052, Zwijnaarde, Ghent, Belgium
| | - Peter De Coster
- Department of Reconstructive Dentistry and Oral Biology, Dental School, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium
| | - Luc Martens
- Department of Paediatric Dentistry and Special Care, PAECOMEDIS Research Cluster, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium
| | - Luc Leybaert
- Department of Basic And Applied Medical Sciences - Physiology Group, Ghent University, Ghent, Belgium
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Szabó E, Juhász F, Hathy E, Reé D, Homolya L, Erdei Z, Réthelyi JM, Apáti Á. Functional Comparison of Blood-Derived Human Neural Progenitor Cells. Int J Mol Sci 2020; 21:E9118. [PMID: 33266139 PMCID: PMC7730078 DOI: 10.3390/ijms21239118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 11/21/2020] [Accepted: 11/26/2020] [Indexed: 12/16/2022] Open
Abstract
Induced pluripotent stem cell (iPSC)-derived neural progenitor cells (NPCs) are promising tools to model complex neurological or psychiatric diseases, including schizophrenia. Multiple studies have compared patient-derived and healthy control NPCs derived from iPSCs in order to investigate cellular phenotypes of this disease, although the establishment, stabilization, and directed differentiation of iPSC lines are rather expensive and time-demanding. However, interrupted reprogramming by omitting the stabilization of iPSCs may allow for the generation of a plastic stage of the cells and thus provide a shortcut to derive NPSCs directly from tissue samples. Here, we demonstrate a method to generate shortcut NPCs (sNPCs) from blood mononuclear cells and present a detailed comparison of these sNPCs with NPCs obtained from the same blood samples through stable iPSC clones and a subsequent neural differentiation (classical NPCs-cNPCs). Peripheral blood cells were obtained from a schizophrenia patient and his two healthy parents (a case-parent trio), while a further umbilical cord blood sample was obtained from the cord of a healthy new-born. The expression of stage-specific markers in sNPCs and cNPCs were compared both at the protein and RNA levels. We also performed functional tests to investigate Wnt and glutamate signaling and the oxidative stress, as these pathways have been suggested to play important roles in the pathophysiology of schizophrenia. We found similar responses in the two types of NPCs, suggesting that the shortcut procedure provides sNPCs, allowing an efficient screening of disease-related phenotypes.
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Affiliation(s)
- Eszter Szabó
- Institute of Enzymology, Research Centre for Natural Sciences, 1117 Budapest, Hungary; (E.S.); (F.J.); (D.R.); (L.H.); (Z.E.)
| | - Flóra Juhász
- Institute of Enzymology, Research Centre for Natural Sciences, 1117 Budapest, Hungary; (E.S.); (F.J.); (D.R.); (L.H.); (Z.E.)
| | - Edit Hathy
- Department of Psychiatry and Psychotherapy, Faculty of Medicine, Semmelweis University, 1083 Budapest, Hungary;
- National Brain Research Project (NAP) Molecular Psychiatry Research Group, Hungarian Academy of Sciences and Faculty of Medicine, Semmelweis University, 1083 Budapest, Hungary
| | - Dóra Reé
- Institute of Enzymology, Research Centre for Natural Sciences, 1117 Budapest, Hungary; (E.S.); (F.J.); (D.R.); (L.H.); (Z.E.)
| | - László Homolya
- Institute of Enzymology, Research Centre for Natural Sciences, 1117 Budapest, Hungary; (E.S.); (F.J.); (D.R.); (L.H.); (Z.E.)
| | - Zsuzsa Erdei
- Institute of Enzymology, Research Centre for Natural Sciences, 1117 Budapest, Hungary; (E.S.); (F.J.); (D.R.); (L.H.); (Z.E.)
| | - János M. Réthelyi
- Department of Psychiatry and Psychotherapy, Faculty of Medicine, Semmelweis University, 1083 Budapest, Hungary;
- National Brain Research Project (NAP) Molecular Psychiatry Research Group, Hungarian Academy of Sciences and Faculty of Medicine, Semmelweis University, 1083 Budapest, Hungary
| | - Ágota Apáti
- Institute of Enzymology, Research Centre for Natural Sciences, 1117 Budapest, Hungary; (E.S.); (F.J.); (D.R.); (L.H.); (Z.E.)
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Hathy E, Szabó E, Varga N, Erdei Z, Tordai C, Czehlár B, Baradits M, Jezsó B, Koller J, Nagy L, Molnár MJ, Homolya L, Nemoda Z, Apáti Á, Réthelyi JM. Investigation of de novo mutations in a schizophrenia case-parent trio by induced pluripotent stem cell-based in vitro disease modeling: convergence of schizophrenia- and autism-related cellular phenotypes. Stem Cell Res Ther 2020; 11:504. [PMID: 33246498 PMCID: PMC7694414 DOI: 10.1186/s13287-020-01980-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 10/18/2020] [Indexed: 12/30/2022] Open
Abstract
Background De novo mutations (DNMs) have been implicated in the etiology of schizophrenia (SZ), a chronic debilitating psychiatric disorder characterized by hallucinations, delusions, cognitive dysfunction, and decreased community functioning. Several DNMs have been identified by examining SZ cases and their unaffected parents; however, in most cases, the biological significance of these mutations remains elusive. To overcome this limitation, we have developed an approach of using induced pluripotent stem cell (iPSC) lines from each member of a SZ case-parent trio, in order to investigate the effects of DNMs in cellular progenies of interest, particularly in dentate gyrus neuronal progenitors. Methods We identified a male SZ patient characterized by early disease onset and negative symptoms, who is a carrier of 3 non-synonymous DNMs in genes LRRC7, KHSRP, and KIR2DL1. iPSC lines were generated from his and his parents’ peripheral blood mononuclear cells using Sendai virus-based reprogramming and differentiated into neuronal progenitor cells (NPCs) and hippocampal dentate gyrus granule cells. We used RNASeq to explore transcriptomic differences and calcium (Ca2+) imaging, cell proliferation, migration, oxidative stress, and mitochondrial assays to characterize the investigated NPC lines. Results NPCs derived from the SZ patient exhibited transcriptomic differences related to Wnt signaling, neuronal differentiation, axonal guidance and synaptic function, and decreased Ca2+ reactivity to glutamate. Moreover, we could observe increased cellular proliferation and alterations in mitochondrial quantity and morphology. Conclusions The approach of reprograming case-parent trios represents an opportunity for investigating the molecular effects of disease-causing mutations and comparing these in cell lines with reduced variation in genetic background. Our results are indicative of a partial overlap between schizophrenia and autism-related phenotypes in the investigated family. Limitations Our study investigated only one family; therefore, the generalizability of findings is limited. We could not derive iPSCs from two other siblings to test for possible genetic effects in the family that are not driven by DNMs. The transcriptomic and functional assays were limited to the NPC stage, although these variables should also be investigated at the mature neuronal stage.
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Affiliation(s)
- Edit Hathy
- National Brain Research Project (NAP) Molecular Psychiatry Research Group, Hungarian Academy of Sciences and Semmelweis University, Budapest, Hungary
| | - Eszter Szabó
- Molecular Cell Biology Research Group, Institute of Enzymology, Research Center for Natural Sciences, 1117 Magyar tudósok körútja 2, Budapest, Hungary
| | - Nóra Varga
- Molecular Cell Biology Research Group, Institute of Enzymology, Research Center for Natural Sciences, 1117 Magyar tudósok körútja 2, Budapest, Hungary
| | - Zsuzsa Erdei
- Molecular Cell Biology Research Group, Institute of Enzymology, Research Center for Natural Sciences, 1117 Magyar tudósok körútja 2, Budapest, Hungary
| | - Csongor Tordai
- National Brain Research Project (NAP) Molecular Psychiatry Research Group, Hungarian Academy of Sciences and Semmelweis University, Budapest, Hungary
| | - Boróka Czehlár
- National Brain Research Project (NAP) Molecular Psychiatry Research Group, Hungarian Academy of Sciences and Semmelweis University, Budapest, Hungary
| | - Máté Baradits
- National Brain Research Project (NAP) Molecular Psychiatry Research Group, Hungarian Academy of Sciences and Semmelweis University, Budapest, Hungary
| | - Bálint Jezsó
- Molecular Cell Biology Research Group, Institute of Enzymology, Research Center for Natural Sciences, 1117 Magyar tudósok körútja 2, Budapest, Hungary
| | - Júlia Koller
- Institute of Rare Disorders and Genomic Medicine, Semmelweis University, Budapest, Hungary
| | - László Nagy
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Mária Judit Molnár
- Institute of Rare Disorders and Genomic Medicine, Semmelweis University, Budapest, Hungary
| | - László Homolya
- Molecular Cell Biology Research Group, Institute of Enzymology, Research Center for Natural Sciences, 1117 Magyar tudósok körútja 2, Budapest, Hungary
| | - Zsófia Nemoda
- Department of Medical Chemistry, Molecular Biology and Pathobiochemistry, Semmelweis University, Budapest, Hungary
| | - Ágota Apáti
- Molecular Cell Biology Research Group, Institute of Enzymology, Research Center for Natural Sciences, 1117 Magyar tudósok körútja 2, Budapest, Hungary.
| | - János M Réthelyi
- National Brain Research Project (NAP) Molecular Psychiatry Research Group, Hungarian Academy of Sciences and Semmelweis University, Budapest, Hungary. .,Department of Psychiatry and Psychotherapy, Semmelweis University, Balassa utca 6, Budapest, 1083, Hungary.
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Visualization and quantification of dynamic intercellular coupling in human embryonic stem cells using single cell sonoporation. Sci Rep 2020; 10:18253. [PMID: 33106521 PMCID: PMC7589565 DOI: 10.1038/s41598-020-75347-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 10/08/2020] [Indexed: 12/28/2022] Open
Abstract
Gap junctions (GJs), which are proteinaceous channels, couple adjacent cells by permitting direct exchange of intracellular molecules with low molecular weights. GJ intercellular communication (GJIC) plays a critical role in regulating behaviors of human embryonic stem cells (hESCs), affecting their proliferation and differentiation. Here we report a novel use of sonoporation that enables single cell intracellular dye loading and dynamic visualization/quantification of GJIC in hESC colonies. By applying a short ultrasound pulse to excite single microbubbles tethered to cell membranes, a transient pore on the cell membrane (sonoporation) is generated which allows intracellular loading of dye molecules and influx of Ca2+ into single hESCs. We employ live imaging for continuous visualization of intercellular dye transfer and Ca2+ diffusion in hESC colonies. We quantify cell–cell permeability based on dye diffusion using mass transport models. Our results reveal heterogeneous intercellular connectivity and a variety of spatiotemporal characteristics of intercellular Ca2+ waves in hESC colonies induced by sonoporation of single cells.
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Vőfély G, Berecz T, Szabó E, Szebényi K, Hathy E, Orbán TI, Sarkadi B, Homolya L, Marchetto MC, Réthelyi JM, Apáti Á. Characterization of calcium signals in human induced pluripotent stem cell-derived dentate gyrus neuronal progenitors and mature neurons, stably expressing an advanced calcium indicator protein. Mol Cell Neurosci 2018; 88:222-230. [DOI: 10.1016/j.mcn.2018.02.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 01/08/2018] [Accepted: 02/02/2018] [Indexed: 10/18/2022] Open
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Generation of a Homozygous Transgenic Rat Strain Stably Expressing a Calcium Sensor Protein for Direct Examination of Calcium Signaling. Sci Rep 2015; 5:12645. [PMID: 26234466 PMCID: PMC4522653 DOI: 10.1038/srep12645] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Accepted: 07/03/2015] [Indexed: 12/16/2022] Open
Abstract
In drug discovery, prediction of selectivity and toxicity require the evaluation of cellular calcium homeostasis. The rat is a preferred laboratory animal for pharmacology and toxicology studies, while currently no calcium indicator protein expressing rat model is available. We established a transgenic rat strain stably expressing the GCaMP2 fluorescent calcium sensor by a transposon-based methodology. Zygotes were co-injected with mRNA of transposase and a CAG-GCaMP2 expressing construct, and animals with one transgene copy were pre-selected by measuring fluorescence in blood cells. A homozygous rat strain was generated with high sensor protein expression in the heart, kidney, liver, and blood cells. No pathological alterations were found in these animals, and fluorescence measurements in cardiac tissue slices and primary cultures demonstrated the applicability of this system for studying calcium signaling. We show here that the GCaMP2 expressing rat cardiomyocytes allow the prediction of cardiotoxic drug side-effects, and provide evidence for the role of Na+/Ca2+ exchanger and its beneficial pharmacological modulation in cardiac reperfusion. Our data indicate that drug-induced alterations and pathological processes can be followed by using this rat model, suggesting that transgenic rats expressing a calcium-sensitive protein provide a valuable system for pharmacological and toxicological studies.
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Szebényi K, Füredi A, Kolacsek O, Csohány R, Prókai Á, Kis-Petik K, Szabó A, Bősze Z, Bender B, Tóvári J, Enyedi Á, Orbán TI, Apáti Á, Sarkadi B. Visualization of Calcium Dynamics in Kidney Proximal Tubules. J Am Soc Nephrol 2015; 26:2731-40. [PMID: 25788535 DOI: 10.1681/asn.2014070705] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Accepted: 01/08/2015] [Indexed: 12/28/2022] Open
Abstract
Intrarenal changes in cytoplasmic calcium levels have a key role in determining pathologic and pharmacologic responses in major kidney diseases. However, cell-specific delivery of calcium-sensitive probes in vivo remains problematic. We generated a transgenic rat stably expressing the green fluorescent protein-calmodulin-based genetically encoded calcium indicator (GCaMP2) predominantly in the kidney proximal tubules. The transposon-based method used allowed the generation of homozygous transgenic rats containing one copy of the transgene per allele with a defined insertion pattern, without genetic or phenotypic alterations. We applied in vitro confocal and in vivo two-photon microscopy to examine basal calcium levels and ligand- and drug-induced alterations in these levels in proximal tubular epithelial cells. Notably, renal ischemia induced a transient increase in cellular calcium, and reperfusion resulted in a secondary calcium load, which was significantly decreased by systemic administration of specific blockers of the angiotensin receptor and the Na-Ca exchanger. The parallel examination of in vivo cellular calcium dynamics and renal circulation by fluorescent probes opens new possibilities for physiologic and pharmacologic investigations.
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Affiliation(s)
- Kornélia Szebényi
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - András Füredi
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Orsolya Kolacsek
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | | | | | - Katalin Kis-Petik
- Department of Biophysics and Radiation Biology, MTA-SE Molecular Biophysics Research Group, and
| | - Attila Szabó
- MTA-SE, Pediatrics and Nephrology Research Group, Budapest, Hungary
| | | | | | - József Tóvári
- Department of Experimental Pharmacology, National Institute of Oncology, Budapest, Hungary
| | - Ágnes Enyedi
- Second Department of Pathology, Semmelweis University, Budapest, Hungary
| | - Tamás I Orbán
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Ágota Apáti
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary;
| | - Balázs Sarkadi
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary; Department of Biophysics and Radiation Biology, MTA-SE Molecular Biophysics Research Group, and
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