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Lee E, Choi HK, Kwon Y, Lee KB. Real-Time, Non-Invasive Monitoring of Neuronal Differentiation Using Intein-Enabled Fluorescence Signal Translocation in Genetically Encoded Stem Cell-Based Biosensors. ADVANCED FUNCTIONAL MATERIALS 2024; 34:2400394. [PMID: 39308638 PMCID: PMC11412434 DOI: 10.1002/adfm.202400394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Indexed: 09/25/2024]
Abstract
Real-time and non-invasive monitoring of neuronal differentiation will help increase our understanding of neuronal development and help develop regenerative stem cell therapies for neurodegenerative diseases. Traditionally, reverse transcription-polymerase chain reaction (RT-PCR), western blotting, and immunofluorescence (IF) staining have been widely used to investigate stem cell differentiation; however, their limitations include endpoint analysis, invasive nature of monitoring, and lack of single-cell-level resolution. Several limitations hamper current approaches to studying neural stem cell (NSC) differentiation. In particular, fixation and staining procedures can introduce artificial changes in cellular morphology, hindering our ability to accurately monitor the progression of the process and fully understand its functional aspects, particularly those related to cellular connectivity and neural network formation. Herein, we report a novel approach to monitor neuronal differentiation of NSCs non-invasively in real-time using cell-based biosensors (CBBs). Our research efforts focused on utilizing intein-mediated protein engineering to design and construct a highly sensitive biosensor capable of detecting a biomarker of neuronal differentiation, hippocalcin. Hippocalcin is a critical protein involved in neurogenesis, and the CBB functions by translocating a fluorescence signal to report the presence of hippocalcin externally. To construct the hippocalcin sensor proteins, hippocalcin bioreceptors, AP2 and glutamate ionotropic receptor AMPA-type subunit 2 (GRIA2), were fused to each split-intein carrying split-nuclear localization signal (NLS) peptides, respectively, and a fluorescent protein was introduced as a reporter. Protein splicing (PS) was triggered in the presence of hippocalcin to generate functional signal peptides, which promptly translocated the fluorescence signal to the nucleus. The stem cell-based biosensor showed fluorescence signal translocation only upon neuronal differentiation. Undifferentiated stem cells or cells that had differentiated into astrocytes or oligodendrocytes did not show fluorescence signal translocation. The number of differentiated neurons was consistent with that measured by conventional IF staining. Furthermore, this approach allowed for the monitoring of neuronal differentiation at an earlier stage than that detected using conventional approaches, and the translocation of fluorescence signal was monitored before the noticeable expression of class III β-tubulin (TuJ1), an early neuronal differentiation marker. We believe that these novel CBBs offer an alternative to current techniques by capturing the dynamics of differentiation progress at the single-cell level and by providing a tool to evaluate how NSCs efficiently differentiate into specific cell types, particularly neurons.
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Affiliation(s)
- Euiyeon Lee
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA
- Department of Biomedical Engineering, Dongguk University, Seoul 04620, Korea
| | - Hye Kyu Choi
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA
| | - Youngeun Kwon
- Department of Biomedical Engineering, Dongguk University, Seoul 04620, Korea
| | - Ki-Bum Lee
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA
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Siqueira E, Kim BH, Reser L, Chow R, Delaney K, Esteller M, Ross MM, Shabanowitz J, Hunt DF, Guil S, Ausió J. Analysis of the interplay between MeCP2 and histone H1 during in vitro differentiation of human ReNCell neural progenitor cells. Epigenetics 2023; 18:2276425. [PMID: 37976174 PMCID: PMC10769555 DOI: 10.1080/15592294.2023.2276425] [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: 06/13/2023] [Accepted: 10/18/2023] [Indexed: 11/19/2023] Open
Abstract
An immortalized neural cell line derived from the human ventral mesencephalon, called ReNCell, and its MeCP2 knock out were used. With it, we characterized the chromatin compositional transitions undergone during differentiation, with special emphasis on linker histones. While the WT cells displayed the development of dendrites and axons the KO cells did not, despite undergoing differentiation as monitored by NeuN. ReNCell expressed minimal amounts of histone H1.0 and their linker histone complement consisted mainly of histone H1.2, H1.4 and H1.5. The overall level of histone H1 exhibited a trend to increase during the differentiation of MeCP2 KO cells. The phosphorylation levels of histone H1 proteins decreased dramatically during ReNCell's cell differentiation independently of the presence of MeCP2. Immunofluorescence analysis showed that MeCP2 exhibits an extensive co-localization with linker histones. Interestingly, the average size of the nucleus decreased during differentiation but in the MeCP2 KO cells, the smaller size of the nuclei at the start of differentiation increased by almost 40% after differentiation by 8 days (8 DIV). In summary, our data provide a compelling perspective on the dynamic changes of H1 histones during neural differentiation, coupled with the intricate interplay between H1 variants and MeCP2.Abbreviations: ACN, acetonitrile; A230, absorbance at 230 nm; bFGF, basic fibroblast growth factor; CM, chicken erythrocyte histone marker; CNS, central nervous system; CRISPR, clustered regulated interspaced short palindromic repeatsDAPI, 4,'6-diaminidino-2-phenylindole; DIV, days in vitro (days after differentiation is induced); DMEM, Dulbecco's modified Eagle medium; EGF, epidermal growth factor; ESC, embryonic stem cell; GAPDH, glyceraldehyde-3-phosphate dehydrogenase; GFAP, glial fibrillary acidic proteinHPLC, high-performance liquid chromatography; IF, immunofluorescence; iPSCs, induced pluripotent stem cells; MAP2, microtubule-associated protein 2; MBD, methyl-binding domain; MeCP2, methyl-CpG binding protein 2; MS, mass spectrometry; NCP, nucleosome core particle; NeuN, neuron nuclear antigen; NPC, neural progenitor cellPAGE, polyacrylamide gel electrophoresis; PBS, phosphate buffered saline; PFA, paraformaldehyde; PTM, posttranslational modification; RP-HPLC, reversed phase HPLC; ReNCells, ReNCells VM; RPLP0, ribosomal protein lateral stalk subunit P0; RT-qPCR, reverse transcription quantitative polymerase-chain reaction; RTT, Rett Syndrome; SDS, sodium dodecyl sulphate; TAD, topologically associating domain; Triple KO, triple knockout.
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Affiliation(s)
- Edilene Siqueira
- Josep Carreras Leukaemia Research Institute (IJC), Badalona, Barcelona, Catalonia, Spain
- National Council for Scientific and Technological Development (CNPq), Brasilia, Federal District, Brazil
| | - Bo-Hyun Kim
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada
| | - Larry Reser
- Department of Chemistry, University of Virginia, Charlottesville, Virginia, USA
| | - Robert Chow
- Department of Biology, University of Victoria, Victoria, BC, Canada
| | - Kerry Delaney
- Department of Biology, University of Victoria, Victoria, BC, Canada
| | - Manel Esteller
- Josep Carreras Leukaemia Research Institute (IJC), Badalona, Barcelona, Catalonia, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Catalonia, Spain
- Physiological Sciences Department, School of Medicine and Health Sciences, University of Barcelona (UB), Barcelona, Catalonia, Spain
| | - Mark M. Ross
- Department of Chemistry, University of Virginia, Charlottesville, Virginia, USA
| | - Jeffrey Shabanowitz
- Department of Chemistry, University of Virginia, Charlottesville, Virginia, USA
| | - Donald F. Hunt
- Department of Chemistry, University of Virginia, Charlottesville, Virginia, USA
- Department of Pathology, University of Virginia, Charlottesville, Virginia, USA
| | - Sonia Guil
- Josep Carreras Leukaemia Research Institute (IJC), Badalona, Barcelona, Catalonia, Spain
- GermansTrias i Pujol Health Science Research Institute, Badalona, Barcelona, Catalonia, Spain
| | - Juan Ausió
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada
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Salgado B, Sastre I, Bullido MJ, Aldudo J. Herpes Simplex Virus Type 1 Induces AD-like Neurodegeneration Markers in Human Progenitor and Differentiated ReNcell VM Cells. Microorganisms 2023; 11:1205. [PMID: 37317179 DOI: 10.3390/microorganisms11051205] [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: 04/04/2023] [Revised: 04/26/2023] [Accepted: 04/27/2023] [Indexed: 06/16/2023] Open
Abstract
An increasing body of evidence strongly suggests that infections or reactivations of herpes simplex virus type 1 (HSV-1) may be closely linked to Alzheimer's disease (AD). Promising results have been obtained using cell and animal models of HSV-1 infection, contributing to the understanding of the molecular mechanisms linking HSV-1 infection and AD neurodegeneration. ReNcell VM is a human neural stem cell line that has been used as a model system to study the impact of various infectious agents on the central nervous system. In this study, we demonstrate the suitability of the ReNcell VM cell line for developing a new in vitro model of HSV-1 infection. By following standard differentiation protocols, we were able to derive various nervous cell types, including neurons, astrocytes, and oligodendrocytes, from neural precursors. Additionally, we demonstrated the susceptibility of ReNcell VM cells, including precursor and differentiated cells, to HSV-1 infection and subsequent viral-induced AD-like neurodegeneration. Our findings support the use of this cell line to generate a new research platform for investigating AD neuropathology and its most significant risk factors, which may lead to important discoveries in the context of this highly impactful disease.
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Affiliation(s)
- Blanca Salgado
- Centro de Biologia Molecular "Severo Ochoa" (C.S.I.C.-U.A.M.), Universidad Autonoma de Madrid, 28049 Madrid, Spain
- Centro de Investigacion Biomedica en Red de Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, 28031 Madrid, Spain
| | - Isabel Sastre
- Centro de Biologia Molecular "Severo Ochoa" (C.S.I.C.-U.A.M.), Universidad Autonoma de Madrid, 28049 Madrid, Spain
- Centro de Investigacion Biomedica en Red de Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, 28031 Madrid, Spain
| | - Maria J Bullido
- Centro de Biologia Molecular "Severo Ochoa" (C.S.I.C.-U.A.M.), Universidad Autonoma de Madrid, 28049 Madrid, Spain
- Centro de Investigacion Biomedica en Red de Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, 28031 Madrid, Spain
- Instituto de Investigación Sanitaria del Hospital Universitario La Paz-IdiPAZ, 28046 Madrid, Spain
| | - Jesus Aldudo
- Centro de Biologia Molecular "Severo Ochoa" (C.S.I.C.-U.A.M.), Universidad Autonoma de Madrid, 28049 Madrid, Spain
- Centro de Investigacion Biomedica en Red de Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, 28031 Madrid, Spain
- Instituto de Investigación Sanitaria del Hospital Universitario La Paz-IdiPAZ, 28046 Madrid, Spain
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Park JW, Kilic O, Deo M, Jimenez-Cowell K, Demirdizen E, Kim H, Turcan Ş. CIC reduces xCT/SLC7A11 expression and glutamate release in glioma. Acta Neuropathol Commun 2023; 11:13. [PMID: 36647117 PMCID: PMC9843885 DOI: 10.1186/s40478-023-01507-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 01/04/2023] [Indexed: 01/18/2023] Open
Abstract
Capicua (CIC) is an important downstream molecule of RTK/RAS/MAPK pathway. The regulatory mechanism of CIC underlying tumorigenesis in oligodendroglioma, where CIC is frequently mutated, has yet to be fully elucidated. Using patient-derived glioma lines, RNA-sequencing and bioinformatic analysis of publicly available databases, we investigated how CIC loss- or gain-of-function regulates its downstream targets, cell proliferation and glutamate release. Our results indicate an increased frequency of CIC truncating mutations in oligodendroglioma during progression. In vitro, CIC modulation had a modest effect on cell proliferation in glioma lines, and no significant changes in the expression of ETV1, ETV4 and ETV5. Transcriptional repression of known CIC targets was observed in gliomas expressing non-phosphorylatable CIC variant on Ser173 which was unable to interact with 14-3-3. These data outline a mechanism by which the repressor function of CIC is inhibited by 14-3-3 in gliomas. Using transcriptional profiling, we found that genes related to glutamate release were upregulated because of CIC depletion. In addition, loss of CIC leads to increased extracellular glutamate. Consistent with this, CIC restoration in an oligodendroglioma line reduced the levels of extracellular glutamate, neuronal toxicity and xCT/SLC7A11 expression. Our findings may provide a molecular basis for the prevention of glioma-associated seizures.
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Affiliation(s)
- Jong-Whi Park
- grid.5253.10000 0001 0328 4908Neurology Clinic and National Center for Tumor Diseases, University Hospital Heidelberg, INF 460, 69120 Heidelberg, Germany ,grid.256155.00000 0004 0647 2973Department of Life Sciences, Gachon University, Incheon, 21999 South Korea
| | - Omer Kilic
- grid.5253.10000 0001 0328 4908Neurology Clinic and National Center for Tumor Diseases, University Hospital Heidelberg, INF 460, 69120 Heidelberg, Germany
| | - Minh Deo
- grid.5253.10000 0001 0328 4908Neurology Clinic and National Center for Tumor Diseases, University Hospital Heidelberg, INF 460, 69120 Heidelberg, Germany
| | - Kevin Jimenez-Cowell
- grid.5253.10000 0001 0328 4908Neurology Clinic and National Center for Tumor Diseases, University Hospital Heidelberg, INF 460, 69120 Heidelberg, Germany
| | - Engin Demirdizen
- grid.5253.10000 0001 0328 4908Neurology Clinic and National Center for Tumor Diseases, University Hospital Heidelberg, INF 460, 69120 Heidelberg, Germany
| | - Hyunggee Kim
- grid.222754.40000 0001 0840 2678Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841 South Korea
| | - Şevin Turcan
- grid.5253.10000 0001 0328 4908Neurology Clinic and National Center for Tumor Diseases, University Hospital Heidelberg, INF 460, 69120 Heidelberg, Germany
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Prutton KM, Marentette JO, Leifheit BA, Esquer H, LaBarbera DV, Anderson CC, Maclean KN, Roede JR. Oxidative stress as a candidate mechanism for accelerated neuroectodermal differentiation due to trisomy 21. Free Radic Biol Med 2022; 186:32-42. [PMID: 35537597 DOI: 10.1016/j.freeradbiomed.2022.04.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 04/21/2022] [Accepted: 04/27/2022] [Indexed: 11/17/2022]
Abstract
The ubiquity of cognitive deficits and early onset Alzheimer's disease in Down syndrome (DS) has focused much DS iPSC-based research on neuron degeneration and regeneration. Despite reports of elevated oxidative stress in DS brains, few studies assess the impact of this oxidative burden on iPSC differentiation. Here, we evaluate cellular specific redox differences in DS and euploid iPSCs and neural progenitor cells (NPCs) during critical intermediate stages of differentiation. Despite successful generation of NPCs, our results indicate accelerated neuroectodermal differentiation of DS iPSCs compared to isogenic, euploid controls. Specifically, DS embryoid bodies (EBs) and neural rosettes prematurely develop with distinct morphological differences from controls. Additionally, we observed developmental stage-specific alterations in mitochondrial superoxide production and SOD1/2 abundance, coupled with modulations in thioredoxin, thioredoxin reductase, and peroxiredoxin isoforms. Disruption of intracellular redox state and its associated signaling has the potential to disrupt cellular differentiation and development in DS lending to DS-specific phenotypes.
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Affiliation(s)
- Kendra M Prutton
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Aurora, CO, 80045, USA; Linda Crnic Institute for Down Syndrome, Aurora, CO, 80045, USA
| | - John O Marentette
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Aurora, CO, 80045, USA; Linda Crnic Institute for Down Syndrome, Aurora, CO, 80045, USA
| | - Brice A Leifheit
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Aurora, CO, 80045, USA
| | - Hector Esquer
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Aurora, CO, 80045, USA; Center for Drug Discovery, University of Colorado, Aurora, CO, 80045, USA
| | - Daniel V LaBarbera
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Aurora, CO, 80045, USA; Center for Drug Discovery, University of Colorado, Aurora, CO, 80045, USA
| | - Colin C Anderson
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Aurora, CO, 80045, USA; Linda Crnic Institute for Down Syndrome, Aurora, CO, 80045, USA
| | - Kenneth N Maclean
- Linda Crnic Institute for Down Syndrome, Aurora, CO, 80045, USA; Department of Pediatrics, School of Medicine, University of Colorado, Aurora, CO, 80045, USA
| | - James R Roede
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Aurora, CO, 80045, USA; Linda Crnic Institute for Down Syndrome, Aurora, CO, 80045, USA.
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Feng X, Cao A, Qin T, Zhang Q, Fan S, Wang B, Song B, Yu X, Li L. Abnormally elevated ubiquilin‑1 expression in breast cancer regulates metastasis and stemness via AKT signaling. Oncol Rep 2021; 46:236. [PMID: 34528694 PMCID: PMC8453688 DOI: 10.3892/or.2021.8187] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 08/10/2021] [Indexed: 12/21/2022] Open
Abstract
Ubiquilin-1 (UBQLN1) is an essential factor for the maintenance of proteostasis in cells. It is important for the regulation of different protein degradation mechanisms, including the ubiquitin-proteasome system, autophagy and endoplasmic reticulum-associated protein degradation pathways. However, the role of UBQLN1 in cancer progression remains largely unknown. In the present study, the expression, functions and molecular mechanisms of UBQLN1 in breast cancer tissue samples and cell lines were explored. Immunohistochemical and bioinformatics analyses revealed that UBQLN1 expression was significantly upregulated in breast cancer tissues and cell lines. UBQLN1 expression in breast cancer was significantly associated with lymph node metastasis and TNM stage. Moreover, a high UBQLN1 expression was a predictor of an unfavorable survival in patients with breast cancer. In vitro, UBQLN1 silencing markedly inhibited cell migration and invasion, epithelial-to-mesenchymal transition (EMT) and MMP expression. UBQLN1 silencing attenuated the stem cell-like properties of breast cancer cells, including their mammosphere-forming abilities. UBQLN1 knockdown also enhanced breast cancer cell chemosensitivity to paclitaxel. The expression levels of the stem cell markers. Aldehyde dehydrogenase 1 (ALDH1), Oct-4 and Sox2 were significantly decreased in the cells in which UBQLN1 was silenced, whereas breast cancer stem cells exhibited an increased expression of UBQLN1. Mechanistically, UBQLN1 knockdown inhibited the activation of AKT signaling, as revealed by the increased PTEN expression and the decreased expression of phosphorylated AKT in cells in which UBQLN1 was silenced. On the whole, the present study demonstrates that UBQLN1 is aberrantly upregulated in breast cancer and predicts a poor prognosis. The silencing of UBQLN1 inhibited the invasion, EMT and stemness of breast cancer cells, possibly via AKT signaling.
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Affiliation(s)
- Xiaoyue Feng
- Department of Pathology and Forensic Medicine, College of Basic Medical Science, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
| | - Anna Cao
- Department of Pathology, Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang 310000, P.R. China
| | - Tao Qin
- Department of Oncology, Qingdao Municipal Hospital, Qingdao, Shandong 266071, P.R. China
| | - Qingqing Zhang
- Department of Pathology and Forensic Medicine, College of Basic Medical Science, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
| | - Shujun Fan
- Department of Pathology and Forensic Medicine, College of Basic Medical Science, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
| | - Bo Wang
- Department of Pathology and Forensic Medicine, College of Basic Medical Science, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
| | - Bo Song
- Department of Pathology and Forensic Medicine, College of Basic Medical Science, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
| | - Xiaotang Yu
- Department of Pathology and Forensic Medicine, College of Basic Medical Science, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
| | - Lianhong Li
- Department of Pathology and Forensic Medicine, College of Basic Medical Science, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
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Yip JLK, Lee MMK, Leung CCY, Tse MK, Cheung AST, Wong YH. AGS3 and Gα i3 Are Concomitantly Upregulated as Part of the Spindle Orientation Complex during Differentiation of Human Neural Progenitor Cells. Molecules 2020; 25:molecules25215169. [PMID: 33172018 PMCID: PMC7664263 DOI: 10.3390/molecules25215169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 10/29/2020] [Accepted: 11/03/2020] [Indexed: 11/16/2022] Open
Abstract
Adult neurogenesis is modulated by many Gi-coupled receptors but the precise mechanism remains elusive. A key step for maintaining the population of neural stem cells in the adult is asymmetric cell division (ACD), a process which entails the formation of two evolutionarily conserved protein complexes that establish the cell polarity and spindle orientation. Since ACD is extremely difficult to monitor in stratified tissues such as the vertebrate brain, we employed human neural progenitor cell lines to examine the regulation of the polarity and spindle orientation complexes during neuronal differentiation. Several components of the spindle orientation complex, but not those of the polarity complex, were upregulated upon differentiation of ENStem-A and ReNcell VM neural progenitor cells. Increased expression of nuclear mitotic apparatus (NuMA), Gαi subunit, and activators of G protein signaling (AGS3 and LGN) coincided with the appearance of a neuronal marker (β-III tubulin) and the concomitant loss of neural progenitor cell markers (nestin and Sox-2). Co-immunoprecipitation assays demonstrated that both Gαi3 and NuMA were associated with AGS3 in differentiated ENStem-A cells. Interestingly, AGS3 appeared to preferentially interact with Gαi3 in ENStem-A cells, and this specificity for Gαi3 was recapitulated in co-immunoprecipitation experiments using HEK293 cells transiently overexpressing GST-tagged AGS3 and different Gαi subunits. Moreover, the binding of Gαi3 to AGS3 was suppressed by GTPγS and pertussis toxin. Disruption of AGS3/Gαi3 interaction by pertussis toxin indicates that AGS3 may recognize the same site on the Gα subunit as G protein-coupled receptors. Regulatory mechanisms controlling the formation of spindle orientation complex may provide novel means to manipulate ACD which in turn may have an impact on neurogenesis.
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Affiliation(s)
- Jackson L. K. Yip
- Division of Life Science and the Biotechnology Research Institute, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077, China; (J.L.K.Y.); (M.M.K.L.); (C.C.Y.L.); (M.K.T.); (A.S.T.C.)
| | - Maggie M. K. Lee
- Division of Life Science and the Biotechnology Research Institute, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077, China; (J.L.K.Y.); (M.M.K.L.); (C.C.Y.L.); (M.K.T.); (A.S.T.C.)
| | - Crystal C. Y. Leung
- Division of Life Science and the Biotechnology Research Institute, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077, China; (J.L.K.Y.); (M.M.K.L.); (C.C.Y.L.); (M.K.T.); (A.S.T.C.)
| | - Man K. Tse
- Division of Life Science and the Biotechnology Research Institute, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077, China; (J.L.K.Y.); (M.M.K.L.); (C.C.Y.L.); (M.K.T.); (A.S.T.C.)
| | - Annie S. T. Cheung
- Division of Life Science and the Biotechnology Research Institute, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077, China; (J.L.K.Y.); (M.M.K.L.); (C.C.Y.L.); (M.K.T.); (A.S.T.C.)
| | - Yung H. Wong
- Division of Life Science and the Biotechnology Research Institute, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077, China; (J.L.K.Y.); (M.M.K.L.); (C.C.Y.L.); (M.K.T.); (A.S.T.C.)
- State Key Laboratory of Molecular Neuroscience, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077, China
- Correspondence: ; Tel.: +852-2358-7328; Fax: +852-2358-1552
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Romero-Trejo D, Mejía-Rodríguez R, Sierra-Mondragón E, Navarrete A, Pérez-Tapia M, González RO, Segovia J. The systemic administration of neural stem cells expressing an inducible and soluble form of growth arrest specific 1 inhibits mammary gland tumor growth and the formation of metastases. Cytotherapy 2020; 23:223-235. [PMID: 33168454 DOI: 10.1016/j.jcyt.2020.09.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 09/21/2020] [Accepted: 09/30/2020] [Indexed: 10/23/2022]
Abstract
BACKGROUND AIMS Metastasis to different organs is the major cause of death in breast cancer patients. The poor clinical prognosis and lack of successful treatments for metastatic breast cancer patients demand the development of new tumor-selective therapies. Thus, it is necessary to develop treatments capable of releasing therapeutic agents to both primary tumors and metastases that avoid toxic side effects in normal tissue, and neural stem cells are an attractive vehicle for tracking tumor cells and delivering anti-cancer agents. The authorspreviously demonstrated that a soluble form of growth arrest specific 1 (GAS1) inhibits the growth of triple-negative breast tumors and glioblastoma. METHODS In this study, the authors engineered ReNcell CX (EMD Millipore, Temecula, CA, USA) neural progenitor cells to express truncated GAS1 (tGAS1) under a tetracycline/on inducible system using lentiviral vectors. RESULTS Here the authors show that treatment with ReNcell-tGAS1 in combination with tetracycline decreased primary tumor growth and inhibited the formation of metastases in tumor-bearing mice by diminishing the phosphorylation of AKT and ERK1/2 in orthotopic mammary gland tumors. Moreover, the authors observed that ReNcell-tGAS1 prolonged the survival of 4T1 tumor-bearing mice. CONCLUSIONS These data suggest that the delivery of tGAS1 by ReNcell cells could be an effective adjuvant for the treatment of triple-negative breast cancer.
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Affiliation(s)
- Daniel Romero-Trejo
- Departamento de Fisiología, Biofísica y Neurociencias, Centro de Investigación y de Estudios Avanzados del IPN, México
| | - Rosalinda Mejía-Rodríguez
- Departamento de Fisiología, Biofísica y Neurociencias, Centro de Investigación y de Estudios Avanzados del IPN, México
| | - Edith Sierra-Mondragón
- Departamento de Fisiología, Biofísica y Neurociencias, Centro de Investigación y de Estudios Avanzados del IPN, México
| | - Araceli Navarrete
- Departamento de Fisiología, Biofísica y Neurociencias, Centro de Investigación y de Estudios Avanzados del IPN, México
| | - Mayra Pérez-Tapia
- Departamento de Inmunología Escuela Nacional de Ciencias Biológicas, del Instituto Politécnico Nacional, México
| | - Rosa O González
- Departamento de Matemáticas, Universidad Autónoma Metropolitana-Iztapalapa (UAM-I), México
| | - José Segovia
- Departamento de Fisiología, Biofísica y Neurociencias, Centro de Investigación y de Estudios Avanzados del IPN, México.
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Kim YM, Kim HJ. Proteasome Inhibitor MG132 is Toxic and Inhibits the Proliferation of Rat Neural Stem Cells but Increases BDNF Expression to Protect Neurons. Biomolecules 2020; 10:biom10111507. [PMID: 33147870 PMCID: PMC7692322 DOI: 10.3390/biom10111507] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 10/21/2020] [Accepted: 10/27/2020] [Indexed: 12/31/2022] Open
Abstract
Regulation of protein expression is essential for maintaining normal cell function. Proteasomes play important roles in protein degradation and dysregulation of proteasomes is implicated in neurodegenerative disorders. In this study, using a proteasome inhibitor MG132, we showed that proteasome inhibition reduces neural stem cell (NSC) proliferation and is toxic to NSCs. Interestingly, MG132 treatment increased the percentage of neurons in both proliferation and differentiation culture conditions of NSCs. Proteasome inhibition reduced B-cell lymphoma 2 (Bcl-2)/Bcl-2 associated X protein ratio. In addition, MG132 treatment induced cAMP response element-binding protein phosphorylation and increased the expression of brain-derived neurotrophic factor transcripts and proteins. These data suggest that proteasome function is important for NSC survival and differentiation. Moreover, although MG132 is toxic to NSCs, it may increase neurogenesis. Therefore, by modifying MG132 chemical structure and developing none toxic proteasome inhibitors, neurogenic chemicals can be developed to control NSC cell fate.
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Affiliation(s)
| | - Hyun-Jung Kim
- Correspondence: ; Tel.: +82-2-820-5619; Fax: +82-2-816-7338
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10
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Tan S, Tong WH, Vyas A. Urolithin-A attenuates neurotoxoplasmosis and alters innate response towards predator odor. Brain Behav Immun Health 2020; 8:100128. [PMID: 34589880 PMCID: PMC8474456 DOI: 10.1016/j.bbih.2020.100128] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 08/04/2020] [Accepted: 08/07/2020] [Indexed: 12/29/2022] Open
Abstract
Neurotoxoplasmosis, also known as cerebral toxoplasmosis, is an opportunistic chronic infection caused by the persistence of parasite Toxoplasma gondii cysts in the brain. In wild animals, chronic infection is associated with behavioral manipulation evident by an altered risk perception towards predators. In humans, reactivation of cysts and conversion of quiescent parasites into highly invasive tachyzoites is a significant cause of mortality in immunocompromised patients. However, the current standard therapy for toxoplasmosis is not well tolerated and is ineffective against the parasite cysts. In recent years, the concept of dietary supplementation with natural products derived from plants has gained popularity as a natural remedy for brain disorders. Notably, urolithin-A, a metabolite produced in the gut following consumption of ellagitannins-enriched food such as pomegranate, is reported to be blood-brain barrier permeable and exhibits neuroprotective effects in-vivo. In this study, we investigated the potential of pomegranate extract and urolithin-A as anti-neurotoxoplasmosis agents in-vitro and in-vivo. Treatment with pomegranate extract and urolithin-A reduced the parasite tachyzoite load and interfered with cyst development in differentiated human neural culture. Administration of urolithin-A also resulted in the formation of smaller brain cysts in chronically infected mice. Interestingly, this phenomenon was mirrored by an enhanced risk perception of the UA-treated infected mice towards predatory cues. Together, our findings demonstrate the potential of dietary supplementation with urolithin-A-enriched food as a novel natural remedy for the treatment of acute and chronic neurotoxoplasmosis. Pomegranate extract reduces T. gondii tachyzoite load and cyst formation in-vitro. Urolithin-A, in part, underlies the anti-T. gondii effect of pomegranate extract. Urolithin-A perturbs cyst development in the brain of chronically infected mice. The reduction in brain cyst burden associates with enhanced fear of infected mice towards cat odor. Dietary supplementation with urolithin-A is a potential therapy for neurotoxoplasmosis.
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Affiliation(s)
- Sijie Tan
- School of Biological Sciences, Nanyang Technological University, Singapore, 637551, Singapore
| | - Wen Han Tong
- School of Biological Sciences, Nanyang Technological University, Singapore, 637551, Singapore
| | - Ajai Vyas
- School of Biological Sciences, Nanyang Technological University, Singapore, 637551, Singapore
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11
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Anantha J, Goulding SR, Wyatt SL, Concannon RM, Collins LM, Sullivan AM, O'Keeffe GW. STRAP and NME1 Mediate the Neurite Growth-Promoting Effects of the Neurotrophic Factor GDF5. iScience 2020; 23:101457. [PMID: 32853992 PMCID: PMC7452236 DOI: 10.1016/j.isci.2020.101457] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 07/17/2020] [Accepted: 08/10/2020] [Indexed: 12/23/2022] Open
Abstract
Loss of midbrain dopaminergic (mDA) neurons and their axons is central to Parkinson's disease (PD). Growth differentiation factor (GDF)5 is a potential neurotrophic factor for PD therapy. However, the molecular mediators of its neurotrophic action are unknown. Our proteomics analysis shows that GDF5 increases the expression of serine threonine receptor-associated protein kinase (STRAP) and nucleoside diphosphate kinase (NME)1 in the SH-SY5Y neuronal cell line. GDF5 overexpression increased NME1 expression in adult rat brain in vivo. NME and STRAP mRNAs are expressed in developing and adult rodent midbrain. Expression of both STRAP and NME1 is necessary and sufficient for the promotion of neurite growth in SH-SY5Y cells by GDF5. NME1 treatment increased neurite growth in both SH-SY5Y cells and cultured mDA neurons. Expression patterns of NME and STRAP are altered in PD midbrain. NME1 and STRAP are thus key mediators of GDF5's neurotrophic effects, rationalizing their future study as therapeutic targets for PD.
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Affiliation(s)
- Jayanth Anantha
- Department of Anatomy & Neuroscience, University College Cork (UCC), Cork, Ireland
| | - Susan R. Goulding
- Department of Anatomy & Neuroscience, University College Cork (UCC), Cork, Ireland
- Department of Biological Sciences, Cork Institute of Technology, Cork, Ireland
| | - Sean L. Wyatt
- School of Biosciences, Cardiff University, Museum Avenue, Cardiff, UK
| | - Ruth M. Concannon
- Department of Anatomy & Neuroscience, University College Cork (UCC), Cork, Ireland
| | - Louise M. Collins
- Department of Anatomy & Neuroscience, University College Cork (UCC), Cork, Ireland
- Department of Physiology, UCC, Cork, Ireland
| | - Aideen M. Sullivan
- Department of Anatomy & Neuroscience, University College Cork (UCC), Cork, Ireland
- APC Microbiome Ireland, UCC, Cork, Ireland
- Cork Neuroscience Centre, UCC, Cork, Ireland
| | - Gerard W. O'Keeffe
- Department of Anatomy & Neuroscience, University College Cork (UCC), Cork, Ireland
- APC Microbiome Ireland, UCC, Cork, Ireland
- Cork Neuroscience Centre, UCC, Cork, Ireland
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12
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Yue W, Kim S, Jung HS, Lee JM, Lee S, Kim E. Differential Protein Expression in Human Dental Pulp: Comparison of Healthy, Inflamed, and Traumatic Pulp. J Clin Med 2019; 8:jcm8081234. [PMID: 31426363 PMCID: PMC6723928 DOI: 10.3390/jcm8081234] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Accepted: 08/14/2019] [Indexed: 12/19/2022] Open
Abstract
Trauma or injury to the dental pulp causes inflammation. This study compared the proteome of healthy pulp with inflamed pulp and traumatic pulp to identify the differentially expressed proteins in the diseased state. Five participants were grouped based on the pulpal status of the teeth: healthy, inflamed, or traumatic pulp. Pulp was extirpated and stored immediately in liquid nitrogen. Pulp tissues were subjected to 2-dimensional gel electrophoresis, and spot selection was performed. The selected spots were analyzed using liquid chromatography-tandem mass spectrometry and identified by correlating mass spectra to the proteomic databases. Fifteen spots showed increased expression in the inflamed and traumatic pulp. Annexin V, type II keratin, and hemoglobin levels were increased two-fold in the inflamed and traumatic pulp group and annexin V, mutant beta-actin, and hemoglobin were increased by ten-fold in the inflamed or traumatic pulp group, compared to levels in the healthy pulp group. Annexin V constituted two out of fifteen protein spots, and seemed to play a critical role in inhibiting inflammation and promoting the immune reaction. Further studies on this protein concerning its role in pulp repair are necessary to elucidate the underlying mechanisms.
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Affiliation(s)
- Wonyoung Yue
- Microscope Center, Department of Conservative Dentistry and Oral Science Research Center, College of Dentistry, Yonsei University, Seoul 03722, Korea
| | - Sunil Kim
- Microscope Center, Department of Conservative Dentistry and Oral Science Research Center, College of Dentistry, Yonsei University, Seoul 03722, Korea
| | - Han-Sung Jung
- Division in Anatomy and Developmental Biology, Department of Oral Biology, Oral Science Research Center, BK21 PLUS Project, Yonsei University College of Dentistry, Seoul 03722, Korea
| | - Jong-Min Lee
- Division in Anatomy and Developmental Biology, Department of Oral Biology, Oral Science Research Center, BK21 PLUS Project, Yonsei University College of Dentistry, Seoul 03722, Korea
| | - Sukjoon Lee
- Department of Applied Life Science, BK21 PLUS Project, Yonsei University College of Dentistry, Seoul 03722, Korea
| | - Euiseong Kim
- Microscope Center, Department of Conservative Dentistry and Oral Science Research Center, College of Dentistry, Yonsei University, Seoul 03722, Korea.
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13
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Delenclos M, Burgess JD, Lamprokostopoulou A, Outeiro TF, Vekrellis K, McLean PJ. Cellular models of alpha-synuclein toxicity and aggregation. J Neurochem 2019; 150:566-576. [PMID: 31265132 DOI: 10.1111/jnc.14806] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 06/19/2019] [Accepted: 07/04/2019] [Indexed: 12/11/2022]
Abstract
Misfolding and aggregation of alpha-synuclein (α-synuclein) with concomitant cytotoxicity is a hallmark of Lewy body related disorders such as Parkinson's disease, dementia with Lewy bodies, and multiple system atrophy. Although it plays a pivotal role in pathogenesis and disease progression, the function of α-synuclein and the molecular mechanisms underlying α-synuclein-induced neurotoxicity in these diseases are still elusive. Many in vitro and in vivo experimental models mimicking α-synuclein pathology such as oligomerization, toxicity and more recently neuronal propagation have been generated over the years. In particular, cellular models have been crucial for our comprehension of the pathogenic process of the disease and are beneficial for screening of molecules capable of modulating α-synuclein toxicity. Here, we review α-synuclein based cell culture models that reproduce some features of the neuronal populations affected in patients, from basic unicellular organisms to mammalian cell lines and primary neurons, to the cutting edge models of patient-specific cell lines. These reprogrammed cells known as induced pluripotent stem cells (iPSCs) have garnered attention because they closely reproduce the characteristics of neurons found in patients and provide a valuable tool for mechanistic studies. We also discuss how different cell models may constitute powerful tools for high-throughput screening of molecules capable of modulating α-synuclein toxicity and prevention of its propagation. This article is part of the Special Issue "Synuclein".
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Affiliation(s)
- Marion Delenclos
- Department of Neuroscience, Mayo Clinic, Jacksonville, Florida, USA
| | - Jeremy D Burgess
- Department of Neuroscience, Mayo Clinic, Jacksonville, Florida, USA.,Neuroscience PhD Program, Mayo Clinic Graduate School of Biomedical Sciences, Jacksonville, Florida, USA
| | - Agaristi Lamprokostopoulou
- Department of Neuroscience, Center for Basic Research, Biomedical Research Foundation, Academy of Athens, Athens, Greece
| | - Tiago F Outeiro
- Department of Experimental Neurodegeneration, Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Göttingen, Germany.,Max Planck Institute for Experimental Medicine, Göttingen, Germany.,Institute of Neuroscience, The Medical School, Newcastle University, Newcastle upon Tyne, UK
| | - Kostas Vekrellis
- Department of Neuroscience, Center for Basic Research, Biomedical Research Foundation, Academy of Athens, Athens, Greece
| | - Pamela J McLean
- Department of Neuroscience, Mayo Clinic, Jacksonville, Florida, USA.,Neuroscience PhD Program, Mayo Clinic Graduate School of Biomedical Sciences, Jacksonville, Florida, USA
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14
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A dynamic view of the proteomic landscape during differentiation of ReNcell VM cells, an immortalized human neural progenitor line. Sci Data 2019; 6:190016. [PMID: 30778261 PMCID: PMC6380223 DOI: 10.1038/sdata.2019.16] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 12/21/2018] [Indexed: 01/25/2023] Open
Abstract
The immortalized human ReNcell VM cell line represents a reproducible and easy-to-propagate cell culture system for studying the differentiation of neural progenitors. To better characterize the starting line and its subsequent differentiation, we assessed protein and phospho-protein levels and cell morphology over a 15-day period during which ReNcell progenitors differentiated into neurons, astrocytes and oligodendrocytes. Five of the resulting datasets measured protein levels or states of phosphorylation based on tandem-mass-tag (TMT) mass spectrometry and four datasets characterized cellular phenotypes using high-content microscopy. Proteomic analysis revealed reproducible changes in pathways responsible for cytoskeletal rearrangement, cell phase transitions, neuronal migration, glial differentiation, neurotrophic signalling and extracellular matrix regulation. Proteomic and imaging data revealed accelerated differentiation in cells treated with the poly-selective CDK and GSK3 inhibitor kenpaullone or the HMG-CoA reductase inhibitor mevastatin, both of which have previously been reported to promote neural differentiation. These data provide in-depth information on the ReNcell progenitor state and on neural differentiation in the presence and absence of drugs, setting the stage for functional studies.
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15
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Abstract
SIGNIFICANCE Numerous studies have demonstrated the actions of reactive oxygen species (ROS) as regulators of several physiological processes. In this study, we discuss how redox signaling mechanisms operate to control different processes such as neuronal differentiation, oligodendrocyte differentiation, dendritic growth, and axonal growth. Recent Advances: Redox homeostasis regulates the physiology of neural stem cells (NSCs). Notably, the neuronal differentiation process of NSCs is determined by a change toward oxidative metabolism, increased levels of mitochondrial ROS, increased activity of NADPH oxidase (NOX) enzymes, decreased levels of Nrf2, and differential regulation of different redoxins. Furthermore, during the neuronal maturation processes, NOX and MICAL produce ROS to regulate cytoskeletal dynamics, which control the dendritic and axonal growth, as well as the axonal guidance. CRITICAL ISSUES The redox homeostasis changes are, in part, attributed to cell metabolism and compartmentalized production of ROS, which is regulated, sensed, and transduced by different molecules such as thioredoxins, glutaredoxins, peroxiredoxins, and nucleoredoxin to control different signaling pathways in different subcellular regions. The study of how these elements cooperatively act is essential for the understanding of nervous system development, as well as the application of regenerative therapies that recapitulate these processes. FUTURE DIRECTIONS The information about these topics in the last two decades leads us to the conclusion that the role of ROS signaling in development of the nervous system is more important than it was previously believed and makes clear the importance of exploring in more detail the mechanisms of redox signaling. Antioxid. Redox Signal. 28, 1603-1625.
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Affiliation(s)
- Mauricio Olguín-Albuerne
- División de Neurociencias, Instituto de Fisiología Celular , Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Julio Morán
- División de Neurociencias, Instituto de Fisiología Celular , Universidad Nacional Autónoma de México, Ciudad de México, México
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16
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Wang R, Wei J, Zhang S, Wu X, Guo J, Liu M, Du K, Xu J, Peng L, Lv Z, You W, Xiong Y, Fu Z. Peroxiredoxin 2 is essential for maintaining cancer stem cell-like phenotype through activation of Hedgehog signaling pathway in colon cancer. Oncotarget 2018; 7:86816-86828. [PMID: 27894099 PMCID: PMC5349956 DOI: 10.18632/oncotarget.13559] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 11/11/2016] [Indexed: 12/12/2022] Open
Abstract
Cancer stem cells (CSCs) are a key target for reducing tumor growth, metastasis, and recurrence. Redox status is a critical factor in the maintenance of CSCs, and the antioxidant enzyme Peroxiredoxin 2 (Prdx2) plays an important role in the development of colon cancer. Therefore, we investigated the contribution of Prdx2 to the maintenance of stemness of colon CSCs. Here, we used short-hairpin RNAs and a Prdx2-overexpression vector to determine the effects of Prdx2. We demonstrated that knockdown of Prdx2 reduced the self-renewal and sphere formation and resulted in increased 5-FU-induced apoptosis in human colon CSCs. Prdx2 overexpression induced reversion of the self-renewal and sphere formation. Furthermore, the effects of Prdx2 resulted in an altered expression of stemness associated with the Hh/Gli1 signaling pathway. Finally, knockdown of Prdx2 in CD133+ cells reduced the volume of xenograft tumors in BALB/c-nu mice. Taken together, colon CSCs overexpress Prdx2, which promotes their stem cell properties via the Hh/Gli1 signaling pathway. The results suggest that Prdx2 may be an effective therapeutic target for the elimination of CSCs in colorectal cancer.
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Affiliation(s)
- Rong Wang
- Department of Gastrointestinal Surgery, The First Affiliated Hospital, Chongqing Medical University, Chongqing 400016, China
| | - Jinlai Wei
- Department of Gastrointestinal Surgery, The First Affiliated Hospital, Chongqing Medical University, Chongqing 400016, China
| | - Shouru Zhang
- Department of Gastrointestinal Surgery, The First Affiliated Hospital, Chongqing Medical University, Chongqing 400016, China
| | - Xingye Wu
- Department of Gastrointestinal Surgery, The First Affiliated Hospital, Chongqing Medical University, Chongqing 400016, China
| | - Jinbao Guo
- Department of Gastrointestinal Surgery, The First Affiliated Hospital, Chongqing Medical University, Chongqing 400016, China
| | - Maoxi Liu
- Department of Gastrointestinal Surgery, The First Affiliated Hospital, Chongqing Medical University, Chongqing 400016, China
| | - Kunli Du
- Department of Gastrointestinal Surgery, The First Affiliated Hospital, Chongqing Medical University, Chongqing 400016, China
| | - Jun Xu
- Department of Gastrointestinal Surgery, The First Affiliated Hospital, Chongqing Medical University, Chongqing 400016, China
| | - Linglong Peng
- Department of Gastrointestinal Surgery, The First Affiliated Hospital, Chongqing Medical University, Chongqing 400016, China
| | - Zhenbing Lv
- Department of Gastrointestinal Surgery, The First Affiliated Hospital, Chongqing Medical University, Chongqing 400016, China
| | - Wenxian You
- Department of Gastrointestinal Surgery, The First Affiliated Hospital, Chongqing Medical University, Chongqing 400016, China
| | - Yongfu Xiong
- Department of Gastrointestinal Surgery, The First Affiliated Hospital, Chongqing Medical University, Chongqing 400016, China
| | - Zhongxue Fu
- Department of Gastrointestinal Surgery, The First Affiliated Hospital, Chongqing Medical University, Chongqing 400016, China
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17
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Dreyer-Andersen N, Almeida AS, Jensen P, Kamand M, Okarmus J, Rosenberg T, Friis SD, Martínez Serrano A, Blaabjerg M, Kristensen BW, Skrydstrup T, Gramsbergen JB, Vieira HLA, Meyer M. Intermittent, low dose carbon monoxide exposure enhances survival and dopaminergic differentiation of human neural stem cells. PLoS One 2018; 13:e0191207. [PMID: 29338033 PMCID: PMC5770048 DOI: 10.1371/journal.pone.0191207] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Accepted: 12/30/2017] [Indexed: 12/18/2022] Open
Abstract
Exploratory studies using human fetal tissue have suggested that intrastriatal transplantation of dopaminergic neurons may become a future treatment for patients with Parkinson's disease. However, the use of human fetal tissue is compromised by ethical, regulatory and practical concerns. Human stem cells constitute an alternative source of cells for transplantation in Parkinson's disease, but efficient protocols for controlled dopaminergic differentiation need to be developed. Short-term, low-level carbon monoxide (CO) exposure has been shown to affect signaling in several tissues, resulting in both protection and generation of reactive oxygen species. The present study investigated the effect of CO produced by a novel CO-releasing molecule on dopaminergic differentiation of human neural stem cells. Short-term exposure to 25 ppm CO at days 0 and 4 significantly increased the relative content of β-tubulin III-immunoreactive immature neurons and tyrosine hydroxylase expressing catecholaminergic neurons, as assessed 6 days after differentiation. Also the number of microtubule associated protein 2-positive mature neurons had increased significantly. Moreover, the content of apoptotic cells (Caspase3) was reduced, whereas the expression of a cell proliferation marker (Ki67) was left unchanged. Increased expression of hypoxia inducible factor-1α and production of reactive oxygen species (ROS) in cultures exposed to CO may suggest a mechanism involving mitochondrial alterations and generation of ROS. In conclusion, the present procedure using controlled, short-term CO exposure allows efficient dopaminergic differentiation of human neural stem cells at low cost and may as such be useful for derivation of cells for experimental studies and future development of donor cells for transplantation in Parkinson's disease.
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Affiliation(s)
- Nanna Dreyer-Andersen
- Department of Neurobiology Research, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Ana Sofia Almeida
- Instituto de Biologia Experimental e Tecnológica (IBET), Oeiras, Portugal
- Instituto de Tecnologia Química e Biológica (ITQB), Oeiras, Portugal
- CEDOC, NOVA Medical School/Faculdade de Ciência Médicas, Universidade Nova de Lisboa, Lisboa, Portugal
| | - Pia Jensen
- Department of Neurobiology Research, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Morad Kamand
- Department of Neurobiology Research, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Justyna Okarmus
- Department of Neurobiology Research, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Tine Rosenberg
- Department of Pathology, Odense University Hospital, Denmark & Department of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Stig Düring Friis
- Center for Insoluble Protein Structures (inSPIN), Department of Chemistry, Aarhus University, Aarhus, Denmark
| | - Alberto Martínez Serrano
- Department of Molecular Biology and Center of Molecular Biology Severo Ochoa, University Autonoma Madrid-C.S.I.C Campus Cantoblanco, Madrid, Spain
| | - Morten Blaabjerg
- Department of Neurology, Zealand University Hospital, Roskilde, Denmark
| | - Bjarne Winther Kristensen
- Department of Pathology, Odense University Hospital, Denmark & Department of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Troels Skrydstrup
- Center for Insoluble Protein Structures (inSPIN), Department of Chemistry, Aarhus University, Aarhus, Denmark
| | - Jan Bert Gramsbergen
- Department of Neurobiology Research, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Helena L. A. Vieira
- Instituto de Biologia Experimental e Tecnológica (IBET), Oeiras, Portugal
- CEDOC, NOVA Medical School/Faculdade de Ciência Médicas, Universidade Nova de Lisboa, Lisboa, Portugal
| | - Morten Meyer
- Department of Neurobiology Research, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark
- Department of Neurology, Zealand University Hospital, Roskilde, Denmark
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18
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Hwang I, Hong S. Neural Stem Cells and Its Derivatives as a New Material for Melanin Inhibition. Int J Mol Sci 2017; 19:ijms19010036. [PMID: 29271951 PMCID: PMC5795986 DOI: 10.3390/ijms19010036] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 12/15/2017] [Accepted: 12/19/2017] [Indexed: 02/07/2023] Open
Abstract
The pigment molecule, melanin, is produced from melanosomes of melanocytes through melanogenesis, which is a complex process involving a combination of chemical and enzymatically catalyzed reactions. The synthesis of melanin is primarily influenced by tyrosinase (TYR), which has attracted interest as a target molecule for the regulation of pigmentation or depigmentation in skin. Thus, direct inhibitors of TYR activity have been sought from various natural and synthetic materials. However, due to issues with these inhibitors, such as weak or permanent ability for depigmentation, allergy, irritant dermatitis and rapid oxidation, in vitro and in vivo, the development of new materials that inhibit melanin production is essential. A conditioned medium (CM) derived from stem cells contains many cell-secreted factors, such as cytokines, chemokines, growth factors and extracellular vesicles including exosomes. In addition, the secreted factors could negatively regulate melanin production through stimulation of a microenvironment of skin tissue in a paracrine manner, which allows the neural stem cell CM to be explored as a new material for skin depigmentation. In this review, we will summarize the current knowledge regulating depigmentation, and discuss the potential of neural stem cells and their derivatives, as a new material for skin depigmentation.
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Affiliation(s)
- Insik Hwang
- School of Biosystem and Biomedical Science, College of Health Science, Korea University, 22 Gil Inchon-ro, Seongbuk-gu, Seoul 02855, Korea.
- Department of Public Health Sciences, Korea University Graduate School, 22 Gil Inchon-ro, Seongbuk-gu, Seoul 02855, Korea.
| | - Sunghoi Hong
- School of Biosystem and Biomedical Science, College of Health Science, Korea University, 22 Gil Inchon-ro, Seongbuk-gu, Seoul 02855, Korea.
- Department of Public Health Sciences, Korea University Graduate School, 22 Gil Inchon-ro, Seongbuk-gu, Seoul 02855, Korea.
- Department of Integrated Biomedical and Life Science, Korea University Graduate School, 22 Gil Inchon-ro, Seongbuk-gu, Seoul 02855, Korea.
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19
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Ahmad A, Strohbuecker S, Tufarelli C, Sottile V. Expression of a SOX1 overlapping transcript in neural differentiation and cancer models. Cell Mol Life Sci 2017; 74:4245-4258. [PMID: 28674729 PMCID: PMC5641280 DOI: 10.1007/s00018-017-2580-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2017] [Revised: 06/04/2017] [Accepted: 06/26/2017] [Indexed: 12/28/2022]
Abstract
SOX1 is a member of the SOXB1 subgroup of transcription factors involved in early embryogenesis, CNS development and maintenance of neural stem cells. The structure and regulation of the human SOX1 locus has been less studied than that of SOX2, another member of the SOXB1 subgroup for which an overlapping transcript has been reported. Here we report that the SOX1 locus harbours a SOX1 overlapping transcript (SOX1-OT), and describe expression, splicing variants and detection of SOX1-OT in different stem and cancer cells. RT-PCR and RACE experiments were performed to detect and characterise the structure of SOX1-OT in neuroprogenitor cultures and across different cancer cell lines. SOX1-OT was found to present a complex structure including several unannotated exons, different transcript variants and at least two potential transcription start sites. SOX1-OT was found to be highly expressed in differentiated neural stem cells across different time points of differentiation, and its expression correlated with SOX1 gene expression. Concomitant expression of SOX1 and SOX1-OT was further observed in several cancer cell models. While the function of this transcript is unknown, the regulatory role reported for other lncRNAs strongly suggests a possible role for SOX1-OT in regulating SOX1 expression, as previously observed for SOX2. The elucidation of the genetic and regulatory context governing SOX1 expression will contribute to clarifying its role in stem cell differentiation and tumorigenesis.
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Affiliation(s)
- Azaz Ahmad
- Wolfson STEM Centre, Division of Cancer & Stem Cells, School of Medicine, University of Nottingham, Nottingham, UK
| | - Stephanie Strohbuecker
- Wolfson STEM Centre, Division of Cancer & Stem Cells, School of Medicine, University of Nottingham, Nottingham, UK
| | - Cristina Tufarelli
- Division of Graduate Entry Medicine & Health, School of Medicine, University of Nottingham, Derby, UK.
| | - Virginie Sottile
- Wolfson STEM Centre, Division of Cancer & Stem Cells, School of Medicine, University of Nottingham, Nottingham, UK.
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20
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Peroxiredoxin 3 maintains the survival of endometrial cancer stem cells by regulating oxidative stress. Oncotarget 2017; 8:92788-92800. [PMID: 29190956 PMCID: PMC5696222 DOI: 10.18632/oncotarget.21580] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 09/08/2017] [Indexed: 11/25/2022] Open
Abstract
Cancer stem cell (CSC)-targeted therapy could reduce tumor growth, recurrence, and metastasis in endometrial cancer (EC). The mitochondria of CSCs have been recently found to be an important target for cancer treatment, but the mitochondrial features of CSCs and their regulators, which maintain mitochondrial function, remain unclear. Here, we investigated the mitochondrial properties of CSCs, and identified specific targets for eliminating CSCs in EC. We found that endometrial CSCs displayed higher mitochondrial membrane potential, Ca2+, reactive oxygen species, ATP levels, and oxygen consumption rates than non-CSCs. Further, we also verified that mitochondrial peroxiredoxin 3 (Prx3) was upregulated, and that it contributed to the survival of CSCs in EC. The knockdown of the Prx3 gene resulted not only in decreased sphere formation, but also reduced the viability of endometrial CSCs, by causing mitochondrial dysfunction. Furthermore, we found that the forkhead box protein M1 (FoxM1), an important transcriptional factor, is overexpressed in patients with EC. FoxM1 expression correlates with elevated Prx3 expression levels, in agreement with the tumorigenic ability of Prx3 in endometrial CSCs. Taken together, our findings indicate that human endometrial CSCs have enhanced mitochondrial function compared to that of endometrial tumor cells. Endometrial CSCs show increased expression of the mitochondrial Prx3, which is required for the maintenance of mitochondrial function and survival, and is induced by FoxM1. Based on our findings, we believe that these proteins might represent valuable therapeutic targets and could provide new insights into the development of new therapeutic strategies for patients with endometrial cancer.
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Markus-Koch A, Schmitt O, Seemann S, Lukas J, Koczan D, Ernst M, Fuellen G, Wree A, Rolfs A, Luo J. ADAM23 promotes neuronal differentiation of human neural progenitor cells. Cell Mol Biol Lett 2017; 22:16. [PMID: 28828010 PMCID: PMC5562998 DOI: 10.1186/s11658-017-0045-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 07/24/2017] [Indexed: 11/10/2022] Open
Abstract
Background ADAM23 is widely expressed in the embryonic central nervous system and plays an important role in tissue formation. Results In this study, we showed that ADAM23 contributes to cell survival and is involved in neuronal differentiation during the differentiation of human neural progenitor cells (hNPCs). Upregulation of ADAM23 in hNPCs was found to increase the number of neurons and the length of neurite, while its downregulation decreases them and triggers cell apoptosis. RNA microarray analysis revealed mechanistic insights into genes and pathways that may become involved in multiple cellular processes upon up- or downregulation of ADAM23. Conclusions Our results suggest that ADAM23 regulates neuronal differentiation by triggering specific signaling pathways during hNPC differentiation. Electronic supplementary material The online version of this article (doi:10.1186/s11658-017-0045-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Annett Markus-Koch
- Albrecht-Kossel-Institute for Neuroregeneration, Rostock University Medical Center, Gehlsheimer Straße 20, 18147 Rostock, Germany
| | - Oliver Schmitt
- Institute of Anatomy, Rostock University Medical Center, Gertrudenstrsse 9, 18055 Rostock, Germany
| | - Susanne Seemann
- Albrecht-Kossel-Institute for Neuroregeneration, Rostock University Medical Center, Gehlsheimer Straße 20, 18147 Rostock, Germany
| | - Jan Lukas
- Albrecht-Kossel-Institute for Neuroregeneration, Rostock University Medical Center, Gehlsheimer Straße 20, 18147 Rostock, Germany
| | - Dirk Koczan
- Institute for Immunology, Rostock University Medical Center, Schillingallee 70, 18055 Rostock, Germany
| | - Mathias Ernst
- Institute for Biostatistics and Informatics in Medicine and Ageing Research, Rostock University Medical Center, Ernst-Heydemann-Str. 8, 18057 Rostock, Germany
| | - Georg Fuellen
- Institute for Biostatistics and Informatics in Medicine and Ageing Research, Rostock University Medical Center, Ernst-Heydemann-Str. 8, 18057 Rostock, Germany
| | - Andreas Wree
- Institute of Anatomy, Rostock University Medical Center, Gertrudenstrsse 9, 18055 Rostock, Germany
| | - Arndt Rolfs
- Albrecht-Kossel-Institute for Neuroregeneration, Rostock University Medical Center, Gehlsheimer Straße 20, 18147 Rostock, Germany
| | - Jiankai Luo
- Albrecht-Kossel-Institute for Neuroregeneration, Rostock University Medical Center, Gehlsheimer Straße 20, 18147 Rostock, Germany
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Abstract
Actin-binding proteins are proteins that could bind to actin or actin fibers. As a member of actin-binding proteins, Transgelin-2 is expressed in smooth muscle cells and non-smooth muscle cells, and its gene, TAGLN2, is differently expressed in all cells and tissues. The deregulation of Transgelin-2 is considered to be correlated with progression of many kinds of diseases, especially the development of malignant tumors, such as invasion, metastasis, and resistance, yet the function and mechanism of action of Transgelin-2 remain elusive. Therefore, we reviewed the basic characteristics and function of Transgelin-2 and its biological role in various types of diseases in order to provide the theoretical basis for further research and new perspectives on cancer development.
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Affiliation(s)
- Ti Meng
- Department of Pharmacy, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, China
| | - Leichao Liu
- Department of Pharmacy, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, China
| | - Ruifang Hao
- Department of Pharmacy, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, China
| | - Siying Chen
- Department of Pharmacy, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, China
| | - Yalin Dong
- Department of Pharmacy, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, China
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23
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Nierode GJ, Perea BC, McFarland SK, Pascoal JF, Clark DS, Schaffer DV, Dordick JS. High-Throughput Toxicity and Phenotypic Screening of 3D Human Neural Progenitor Cell Cultures on a Microarray Chip Platform. Stem Cell Reports 2016; 7:970-982. [PMID: 28157485 PMCID: PMC5106528 DOI: 10.1016/j.stemcr.2016.10.001] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 09/30/2016] [Accepted: 10/03/2016] [Indexed: 01/09/2023] Open
Abstract
A 3D cell culture chip was used for high-throughput screening of a human neural progenitor cell line. The differential toxicity of 24 compounds was determined on undifferentiated and differentiating NPCs. Five compounds led to significant differences in IC50 values between undifferentiated and differentiating cultures. This platform has potential use in phenotypic screening to elucidate molecular toxicology on human stem cells. Demonstrated chip platform for HTS of protein expression and toxicity of 3D cultures Dose-response viability and proliferation of a 24-compound library on human NPC lines Assessed differential toxicity between progenitors and differentiating progeny Identified five compounds more toxic to undifferentiated progenitors
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Affiliation(s)
- Gregory J Nierode
- Chemical and Biological Engineering and Center for Biotechnology & Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
| | - Brian C Perea
- Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, USA
| | - Sean K McFarland
- Bioengineering, University of California, Berkeley, CA 94720, USA
| | - Jorge F Pascoal
- Department of Bioengineering and Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Lisbon 1049-001, Portugal
| | - Douglas S Clark
- Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, USA
| | - David V Schaffer
- Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, USA; Bioengineering, University of California, Berkeley, CA 94720, USA
| | - Jonathan S Dordick
- Chemical and Biological Engineering and Center for Biotechnology & Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY 12180, USA.
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24
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Ivanov DP, Al-Rubai AJ, Grabowska AM, Pratten MK. Separating chemotherapy-related developmental neurotoxicity from cytotoxicity in monolayer and neurosphere cultures of human fetal brain cells. Toxicol In Vitro 2016; 37:88-96. [PMID: 27622579 DOI: 10.1016/j.tiv.2016.09.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 08/01/2016] [Accepted: 09/09/2016] [Indexed: 12/22/2022]
Abstract
Chemotherapy-induced neurotoxicity can reduce the quality of life of patients by affecting their intelligence, senses and mobility. Ten percent of safety-related late-stage clinical failures are due to neurological side effects. Animal models are poor in predicting human neurotoxicity due to interspecies differences and most in vitro assays cannot distinguish neurotoxicity from general cytotoxicity for chemotherapeutics. We developed in vitro assays capable of quantifying the paediatric neurotoxic potential for cytotoxic drugs. Mixed cultures of human fetal brain cells were differentiated in monolayers and as 3D-neurospheres in the presence of non-neurotoxic chemotherapeutics (etoposide, teniposide) or neurotoxicants (methylmercury). The cytotoxic potency towards dividing progenitors versus differentiated neurons and astrocytes was compared using: (1) immunohistochemistry staining and cell counts in monolayers; (2) through quantitative Western blots in neurospheres; and (3) neurosphere migration assays. Etoposide and teniposide, were 5-10 times less toxic to differentiated neurons compared to the mix of all cells in monolayer cultures. In contrast, the neurotoxicant methylmercury did not exhibit selectivity and killed all cells with the same potency. In 3D neurospheres, etoposide and teniposide were 24 to 10 times less active against neurons compared to all cells. These assays can be used prioritise drugs for local drug delivery to brain tumours.
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Affiliation(s)
- Delyan P Ivanov
- Cancer Biology, Division of Cancer and Stem Cells, School of Medicine, Queen's Medical Centre, University of Nottingham, Nottingham, UK.
| | - Abdal-Jabbar Al-Rubai
- School of Life Sciences, Queen's Medical Centre, University of Nottingham, Nottingham, UK.
| | - Anna M Grabowska
- Cancer Biology, Division of Cancer and Stem Cells, School of Medicine, Queen's Medical Centre, University of Nottingham, Nottingham, UK.
| | - Margaret K Pratten
- School of Life Sciences, Queen's Medical Centre, University of Nottingham, Nottingham, UK.
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25
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Ivanov DP, Coyle B, Walker DA, Grabowska AM. In vitro models of medulloblastoma: Choosing the right tool for the job. J Biotechnol 2016; 236:10-25. [PMID: 27498314 DOI: 10.1016/j.jbiotec.2016.07.028] [Citation(s) in RCA: 148] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Accepted: 07/29/2016] [Indexed: 02/06/2023]
Abstract
The recently-defined four molecular subgroups of medulloblastoma have required updating of our understanding of in vitro models to include molecular classification and risk stratification features from clinical practice. This review seeks to build a more comprehensive picture of the in vitro systems available for modelling medulloblastoma. The subtype classification and molecular characterisation for over 40 medulloblastoma cell-lines has been compiled, making it possible to identify the strengths and weaknesses in current model systems. Less than half (18/44) of established medulloblastoma cell-lines have been subgrouped. The majority of the subgrouped cell-lines (11/18) are Group 3 with MYC-amplification. SHH cell-lines are the next most common (4/18), half of which exhibit TP53 mutation. WNT and Group 4 subgroups, accounting for 50% of patients, remain underrepresented with 1 and 2 cell-lines respectively. In vitro modelling relies not only on incorporating appropriate tumour cells, but also on using systems with the relevant tissue architecture and phenotype as well as normal tissues. Novel ways of improving the clinical relevance of in vitro models are reviewed, focusing on 3D cell culture, extracellular matrix, co-cultures with normal cells and organotypic slices. This paper champions the establishment of a collaborative online-database and linked cell-bank to catalyse preclinical medulloblastoma research.
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Affiliation(s)
- Delyan P Ivanov
- Division of Cancer and Stem Cells, Cancer Biology, University of Nottingham, Nottingham, UK.
| | - Beth Coyle
- Children's Brain Tumour Research Centre, Queens Medical Centre, University of Nottingham, Nottingham, UK.
| | - David A Walker
- Children's Brain Tumour Research Centre, Queens Medical Centre, University of Nottingham, Nottingham, UK.
| | - Anna M Grabowska
- Division of Cancer and Stem Cells, Cancer Biology, University of Nottingham, Nottingham, UK.
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26
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Fröhlich M, Jaeger A, Weiss DG, Kriehuber R. Inhibition of BCL‐2 leads to increased apoptosis and delayed neuronal differentiation in human ReNcell VM cells
in vitro. Int J Dev Neurosci 2015; 48:9-17. [DOI: 10.1016/j.ijdevneu.2015.10.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 10/21/2015] [Accepted: 10/21/2015] [Indexed: 10/22/2022] Open
Affiliation(s)
- Michael Fröhlich
- University of RostockInstitute of Biological Sciences, Cell Biology and Biosystems TechnologyAlbert‐Einstein‐Straße 3D‐18051RostockGermany
| | - Alexandra Jaeger
- University of RostockInstitute of Biological Sciences, Cell Biology and Biosystems TechnologyAlbert‐Einstein‐Straße 3D‐18051RostockGermany
| | - Dieter G. Weiss
- University of RostockInstitute of Biological Sciences, Cell Biology and Biosystems TechnologyAlbert‐Einstein‐Straße 3D‐18051RostockGermany
| | - Ralf Kriehuber
- University of RostockInstitute of Biological Sciences, Cell Biology and Biosystems TechnologyAlbert‐Einstein‐Straße 3D‐18051RostockGermany
- Department of Safety and Radiation Protection, Radiation Biology UnitForschungszentrum Jülich GmbHD‐52425JülichGermany
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27
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Shoemaker LD, Kornblum HI. Neural Stem Cells (NSCs) and Proteomics. Mol Cell Proteomics 2015; 15:344-54. [PMID: 26494823 PMCID: PMC4739658 DOI: 10.1074/mcp.o115.052704] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2015] [Indexed: 01/09/2023] Open
Abstract
Neural stem cells (NSCs) can self-renew and give rise to the major cell types of the CNS. Studies of NSCs include the investigation of primary, CNS-derived cells as well as animal and human embryonic stem cell (ESC)-derived and induced pluripotent stem cell (iPSC)-derived sources. NSCs provide a means with which to study normal neural development, neurodegeneration, and neurological disease and are clinically relevant sources for cellular repair to the damaged and diseased CNS. Proteomics studies of NSCs have the potential to delineate molecules and pathways critical for NSC biology and the means by which NSCs can participate in neural repair. In this review, we provide a background to NSC biology, including the means to obtain them and the caveats to these processes. We then focus on advances in the proteomic interrogation of NSCs. This includes the analysis of posttranslational modifications (PTMs); approaches to analyzing different proteomic compartments, such the secretome; as well as approaches to analyzing temporal differences in the proteome to elucidate mechanisms of differentiation. We also discuss some of the methods that will undoubtedly be useful in the investigation of NSCs but which have not yet been applied to the field. While many proteomics studies of NSCs have largely catalogued the proteome or posttranslational modifications of specific cellular states, without delving into specific functions, some have led to understandings of functional processes or identified markers that could not have been identified via other means. Many challenges remain in the field, including the precise identification and standardization of NSCs used for proteomic analyses, as well as how to translate fundamental proteomics studies to functional biology. The next level of investigation will require interdisciplinary approaches, combining the skills of those interested in the biochemistry of proteomics with those interested in modulating NSC function.
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Affiliation(s)
- Lorelei D Shoemaker
- From the ‡Department of Neurosurgery, Stanford Neuromolecular Innovation Program, Stanford University, 300 Pasteur Drive, Stanford, CA 94305
| | - Harley I Kornblum
- §NPI-Semel Institute for Neuroscience & Human Behavior, Departments of Psychiatry and Biobehavioral Sciences, and of Molecular and Medical Pharmacology, The Molecular Biology Institute, Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, and The Jonsson Comprehensive Cancer Center, David Geffen School of Medicine, University of California, Los Angeles, Los, Angeles, CA 90095
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28
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Song IS, Jeong YJ, Jeong SH, Heo HJ, Kim HK, Bae KB, Park YH, Kim SU, Kim JM, Kim N, Ko KS, Rhee BD, Han J. FOXM1-Induced PRX3 Regulates Stemness and Survival of Colon Cancer Cells via Maintenance of Mitochondrial Function. Gastroenterology 2015; 149:1006-16.e9. [PMID: 26091938 DOI: 10.1053/j.gastro.2015.06.007] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2014] [Revised: 06/01/2015] [Accepted: 06/03/2015] [Indexed: 12/19/2022]
Abstract
BACKGROUND & AIMS Reagents designed to target cancer stem cells (CSCs) could reduce tumor growth, recurrence, and metastasis. We investigated the mitochondrial features of CSCs. METHODS Colon adenocarcinoma fragments were obtained from 8 patients during surgery at Busan Paik Hospital in Korea. We used immunohistochemistry and quantitative polymerase chain reaction to compare expression of mitochondrial peroxiredoxin 3 (PRX3) in CD133(+)CD44(+) Lgr5(+)cells (CSCs) vs CD133(-)CD44(-)Lgr5(-) colon tumor cells (non-CSCs). Cell survival and expression of mitochondrial-related genes were analyzed in the presence of 5-fluorouracil and/or antimycin A. We used small-interfering and short-hairpin RNAs and an overexpression vector to study PRX3, which functions in the mitochondria. CD133(+) cells with PRX3 knockdown or overexpressing PRX3 were grown as xenograft tumors in immunocompromised mice. Metastasis was studied after injection of tumor cells in spleens of mice. We used chromatin immunoprecipitation and reporter assays to characterize transcriptional regulation of PRX3 by forkhead box protein 1. RESULTS CSCs had a higher mitochondrial membrane potential and increased levels of adenosine triphosphate, Ca(2+), reactive oxygen species, and oxygen consumption than non-CSCs. Levels of PRX3 were increased in colon CSCs compared with non-CSCs. PRX3 knockdown reduced the viability of CSCs, but non non-CSCs, by inducing mitochondrial dysfunction. PRX3 knockdown reduced growth of CSCs as xenograft tumors or metastases in mice. The expression of FOXM1 activated transcription of PRX3 and expression of CD133 in colon CSCs. CONCLUSIONS Human colon CSCs have increased mitochondrial function compared with colon tumor cells without stem cell properties. Colon CSCs overexpress the mitochondrial gene PRX3, which is required for maintenance of mitochondrial function and tumorigenesis, and is regulated by forkhead box protein 1, which also regulates expression of CD133 in these cells. These proteins might be therapeutic targets for colorectal cancer.
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Affiliation(s)
- In-Sung Song
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan, Korea
| | - Yu Jeong Jeong
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan, Korea
| | - Seung Hun Jeong
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan, Korea
| | - Hye Jin Heo
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan, Korea
| | - Hyoung Kyu Kim
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan, Korea
| | - Ki Beom Bae
- Department of Surgery, College of Medicine, Inje University, Busan Paik Hospital, Busan, Korea
| | - Young-Ho Park
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea
| | - Sun Uk Kim
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea
| | - Jin-Man Kim
- Department of Pathology, School of Medicine, Chungnam National University, Daejeon, Korea
| | - Nari Kim
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan, Korea
| | - Kyung Soo Ko
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan, Korea
| | - Byoung Doo Rhee
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan, Korea
| | - Jin Han
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan, Korea.
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29
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Abstract
Stem cell technologies have facilitated the development of human cellular disease models that can be used to study pathogenesis and test therapeutic candidates. These models hold promise for complex neurological diseases such as Alzheimer's disease (AD), because existing animal models have been unable to fully recapitulate all aspects of pathology. We recently reported the characterization of a novel 3D culture system that exhibits key events in AD pathogenesis, including extracellular aggregation of amyloid-β (Aβ) and accumulation of hyperphosphorylated tau. Here we provide instructions for the generation and analysis of 3D human neural cell cultures, including the production of genetically modified human neural progenitor cells (hNPCs) with familial AD mutations, the differentiation of the hNPCs in a 3D matrix and the analysis of AD pathogenesis. The 3D culture generation takes 1-2 d. The aggregation of Aβ is observed after 6 weeks of differentiation, followed by robust tau pathology after 10-14 weeks.
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30
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Pires F, Ferreira Q, Rodrigues CA, Morgado J, Ferreira FC. Neural stem cell differentiation by electrical stimulation using a cross-linked PEDOT substrate: Expanding the use of biocompatible conjugated conductive polymers for neural tissue engineering. Biochim Biophys Acta Gen Subj 2015; 1850:1158-68. [DOI: 10.1016/j.bbagen.2015.01.020] [Citation(s) in RCA: 157] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Revised: 01/24/2015] [Accepted: 01/30/2015] [Indexed: 12/23/2022]
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31
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Pandey A, Singh P, Jauhari A, Singh T, Khan F, Pant AB, Parmar D, Yadav S. Critical role of the miR-200 family in regulating differentiation and proliferation of neurons. J Neurochem 2015; 133:640-52. [DOI: 10.1111/jnc.13089] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2014] [Revised: 02/20/2015] [Accepted: 02/20/2015] [Indexed: 01/12/2023]
Affiliation(s)
- Ankita Pandey
- Developmental Toxicology Division; CSIR-Indian Institute of Toxicology Research; Lucknow Uttar Pradesh India
| | - Parul Singh
- Developmental Toxicology Division; CSIR-Indian Institute of Toxicology Research; Lucknow Uttar Pradesh India
| | - Abhishek Jauhari
- Developmental Toxicology Division; CSIR-Indian Institute of Toxicology Research; Lucknow Uttar Pradesh India
- Academy of Scientific and Innovative Research (AcSIR); New Delhi India
| | - Tanisha Singh
- Developmental Toxicology Division; CSIR-Indian Institute of Toxicology Research; Lucknow Uttar Pradesh India
| | - Farah Khan
- Department of Biochemistry; JamiaHamdard University; New Delhi India
| | - Aditya B. Pant
- Developmental Toxicology Division; CSIR-Indian Institute of Toxicology Research; Lucknow Uttar Pradesh India
| | - Devendra Parmar
- Developmental Toxicology Division; CSIR-Indian Institute of Toxicology Research; Lucknow Uttar Pradesh India
| | - Sanjay Yadav
- Developmental Toxicology Division; CSIR-Indian Institute of Toxicology Research; Lucknow Uttar Pradesh India
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32
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Haack F, Lemcke H, Ewald R, Rharass T, Uhrmacher AM. Spatio-temporal model of endogenous ROS and raft-dependent WNT/beta-catenin signaling driving cell fate commitment in human neural progenitor cells. PLoS Comput Biol 2015; 11:e1004106. [PMID: 25793621 PMCID: PMC4368204 DOI: 10.1371/journal.pcbi.1004106] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Accepted: 12/31/2014] [Indexed: 02/03/2023] Open
Abstract
Canonical WNT/β-catenin signaling is a central pathway in embryonic development, but it is also connected to a number of cancers and developmental disorders. Here we apply a combined in-vitro and in-silico approach to investigate the spatio-temporal regulation of WNT/β-catenin signaling during the early neural differentiation process of human neural progenitors cells (hNPCs), which form a new prospect for replacement therapies in the context of neurodegenerative diseases. Experimental measurements indicate a second signal mechanism, in addition to canonical WNT signaling, being involved in the regulation of nuclear β-catenin levels during the cell fate commitment phase of neural differentiation. We find that the biphasic activation of β-catenin signaling observed experimentally can only be explained through a model that combines Reactive Oxygen Species (ROS) and raft dependent WNT/β-catenin signaling. Accordingly after initiation of differentiation endogenous ROS activates DVL in a redox-dependent manner leading to a transient activation of down-stream β-catenin signaling, followed by continuous auto/paracrine WNT signaling, which crucially depends on lipid rafts. Our simulation studies further illustrate the elaborate spatio-temporal regulation of DVL, which, depending on its concentration and localization, may either act as direct inducer of the transient ROS/β-catenin signal or as amplifier during continuous auto-/parcrine WNT/β-catenin signaling. In addition we provide the first stochastic computational model of WNT/β-catenin signaling that combines membrane-related and intracellular processes, including lipid rafts/receptor dynamics as well as WNT- and ROS-dependent β-catenin activation. The model’s predictive ability is demonstrated under a wide range of varying conditions for in-vitro and in-silico reference data sets. Our in-silico approach is realized in a multi-level rule-based language, that facilitates the extension and modification of the model. Thus, our results provide both new insights and means to further our understanding of canonical WNT/β-catenin signaling and the role of ROS as intracellular signaling mediator. Human neural progenitor cells offer the promising perspective of using in-vitro grown neural cell populations for replacement therapies in the context of neurodegenerative diseases, such as Parkinson’s or Huntington’s disease. However, to control hNPC differentiation within the scope of stem cell engineering, a thorough understanding of cell fate determination and its endogenous regulation is required. Here we investigate the spatio-temporal regulation of WNT/β-catenin signaling in the process of cell fate commitment in hNPCs, which has been reported to play a crucial role for the differentiation process of hNPCs. Based on a combined in-vitro and in-silico approach we demonstrate an elaborate interplay between endogenous ROS and lipid raft dependent WNT/beta-catenin signaling controlling the nuclear beta-catenin levels throughout the initial phase of neural differentiation. The stochastic multi-level computational model we derive from our experimental measurements adds to the family of existing WNT models, addressing major biochemical and spatial aspects of WNT/beta-catenin signaling that have not been considered in existing models so far. Cross validation studies manifest its predictive capability for other cells and cell lines rendering the model a suitable basis for further studies also in the context of embryonic development, developmental disorders and cancers.
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Affiliation(s)
- Fiete Haack
- Modeling and Simulation Group, Institute of Computer Science, University of Rostock, Rostock, Germany
- * E-mail:
| | - Heiko Lemcke
- Live Cell Imaging Center, Institute of Biological Sciences, University of Rostock, Rostock, Germany
- Reference and Translation Center for Cardiac Stem Cell Therapy (RTC), University Medical Center Rostock, Rostock, Germany
| | - Roland Ewald
- Modeling and Simulation Group, Institute of Computer Science, University of Rostock, Rostock, Germany
| | - Tareck Rharass
- Live Cell Imaging Center, Institute of Biological Sciences, University of Rostock, Rostock, Germany
- Electrochemical Signaling in Development and Disease, Max-Delbrück-Center for Molecular Medicine (MDC) Berlin-Buch, Berlin-Buch, Germany
| | - Adelinde M. Uhrmacher
- Modeling and Simulation Group, Institute of Computer Science, University of Rostock, Rostock, Germany
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33
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Melo-Braga MN, Meyer M, Zeng X, Larsen MR. Characterization of human neural differentiation from pluripotent stem cells using proteomics/PTMomics-Current state-of-the-art and challenges. Proteomics 2015; 15:656-74. [DOI: 10.1002/pmic.201400388] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Revised: 11/11/2014] [Accepted: 11/19/2014] [Indexed: 01/18/2023]
Affiliation(s)
- Marcella Nunes Melo-Braga
- Department of Biochemistry and Molecular Biology; University of Southern Denmark; Odense Denmark
- Center for Clinical Proteomics; University of Southern Denmark; Odense Denmark
| | - Morten Meyer
- Department of Neurobiology Research; Institute of Molecular Medicine; University of Southern Denmark; Odense Denmark
| | | | - Martin Røssel Larsen
- Department of Biochemistry and Molecular Biology; University of Southern Denmark; Odense Denmark
- Center for Clinical Proteomics; University of Southern Denmark; Odense Denmark
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Rharass T, Lemcke H, Lantow M, Kuznetsov SA, Weiss DG, Panáková D. Ca2+-mediated mitochondrial reactive oxygen species metabolism augments Wnt/β-catenin pathway activation to facilitate cell differentiation. J Biol Chem 2014; 289:27937-51. [PMID: 25124032 PMCID: PMC4183826 DOI: 10.1074/jbc.m114.573519] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Emerging evidence suggests that reactive oxygen species (ROS) can stimulate the Wnt/β-catenin pathway in a number of cellular processes. However, potential sources of endogenous ROS have not been thoroughly explored. Here, we show that growth factor depletion in human neural progenitor cells induces ROS production in mitochondria. Elevated ROS levels augment activation of Wnt/β-catenin signaling that regulates neural differentiation. We find that growth factor depletion stimulates the release of Ca(2+) from the endoplasmic reticulum stores. Ca(2+) subsequently accumulates in the mitochondria and triggers ROS production. The inhibition of mitochondrial Ca(2+) uptake with simultaneous growth factor depletion prevents the rise in ROS metabolism. Moreover, low ROS levels block the dissociation of the Wnt effector Dishevelled from nucleoredoxin. Attenuation of the response amplitudes of pathway effectors delays the onset of the Wnt/β-catenin pathway activation and results in markedly impaired neuronal differentiation. Our findings reveal Ca(2+)-mediated ROS metabolic cues that fine-tune the efficiency of cell differentiation by modulating the extent of the Wnt/β-catenin signaling output.
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Affiliation(s)
- Tareck Rharass
- From Electrochemical Signaling in Development and Disease, Max-Delbrück-Center for Molecular Medicine, Robert-Rössle-Strasse 10, D-13125 Berlin-Buch and Cell Biology and Biosystems Technology, Institute of Biological Sciences, and Live Cell Imaging Center, University of Rostock, Albert-Einstein-Strasse 3, D-18059 Rostock, Germany
| | - Heiko Lemcke
- Cell Biology and Biosystems Technology, Institute of Biological Sciences, and Live Cell Imaging Center, University of Rostock, Albert-Einstein-Strasse 3, D-18059 Rostock, Germany
| | - Margareta Lantow
- Cell Biology and Biosystems Technology, Institute of Biological Sciences, and
| | - Sergei A Kuznetsov
- Live Cell Imaging Center, University of Rostock, Albert-Einstein-Strasse 3, D-18059 Rostock, Germany
| | - Dieter G Weiss
- Cell Biology and Biosystems Technology, Institute of Biological Sciences, and Live Cell Imaging Center, University of Rostock, Albert-Einstein-Strasse 3, D-18059 Rostock, Germany
| | - Daniela Panáková
- From Electrochemical Signaling in Development and Disease, Max-Delbrück-Center for Molecular Medicine, Robert-Rössle-Strasse 10, D-13125 Berlin-Buch and
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López-Ornelas A, Vergara P, Segovia J. Neural stem cells producing an inducible and soluble form of Gas1 target and inhibit intracranial glioma growth. Cytotherapy 2014; 16:1011-23. [DOI: 10.1016/j.jcyt.2013.12.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Revised: 11/19/2013] [Accepted: 12/12/2013] [Indexed: 01/14/2023]
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Ubiquilin-1 protects cells from oxidative stress and ischemic stroke caused tissue injury in mice. J Neurosci 2014; 34:2813-21. [PMID: 24553923 PMCID: PMC3953589 DOI: 10.1523/jneurosci.3541-13.2014] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Ubiquilin-1 (Ubqln1 or Ubqln), a ubiquitin-like protein, mediates degradation of misfolded proteins and has been implicated in a number of pathological and physiological conditions. To better understand its function in vivo, we recently generated transgenic (Tg) mice that globally overexpress mouse Ubqln in a variety of tissues and ubqln conditional knock-out mice. The Tg mice were viable and did not show any developmental or behavioral abnormalities compared with their wild-type (WT) littermates. When subjected to oxidative stress or ischemia/reperfusion, however, ubqln Tg mice but not the WT littermates showed increased tolerance to these insults. Following ischemic stroke, ubqln Tg mice recovered motor function more rapidly than did the WT mice. In contrast, KO of ubqln exacerbated neuronal damage after stroke. In addition, KO of ubqln also caused accumulation of ubiquitinated proteins. When ubqln KO mice were crossed with a ubiquitin-proteasome system function reporter mouse, the accumulation of a proteasome surrogate substrate was observed. These results suggest that Ubqln protects mice from oxidative stress and ischemic stroke-caused neuronal injury through facilitating removal of damaged proteins. Thus, enhanced removal of unwanted proteins is a potential therapeutic strategy for treating stroke-caused neuronal injury.
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Kim SU, Park YH, Kim JM, Sun HN, Song IS, Huang SM, Lee SH, Chae JI, Hong S, Sik Choi S, Choi SC, Lee TH, Kang SW, Rhee SG, Chang KT, Lee SH, Yu DY, Lee DS. Dominant Role of Peroxiredoxin/JNK Axis in Stemness Regulation During Neurogenesis from Embryonic Stem Cells. Stem Cells 2014; 32:998-1011. [DOI: 10.1002/stem.1593] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
Abstract
Abstract
Redox balance has been suggested as an important determinant of “stemness” in embryonic stem cells (ESCs). In this study, we demonstrate that peroxiredoxin (Prx) plays a pivotal role in maintenance of ESC stemness during neurogenesis through suppression of reactive oxygen species (ROS)-sensitive signaling. During neurogenesis, Prx I and Oct4 are expressed in a mutually dependent manner and their expression is abruptly downregulated by an excess of ROS. Thus, in Prx I−/− or Prx II−/− ESCs, rapid loss of stemness can occur due to spontaneous ROS overload, leading to their active commitment into neurons; however, stemness is restored by the addition of an antioxidant or an inhibitor of c-Jun N-terminal kinase (JNK). In addition, Prx I and Prx II appear to have a tight association with the mechanism underlying the protection of ESC stemness in developing teratomas. These results suggest that Prx functions as a protector of ESC stemness by opposing ROS/JNK cascades during neurogenesis. Therefore, our findings have important implications for understanding of maintenance of ESC stemness through involvement of antioxidant enzymes and may lead to development of an alternative stem cell-based therapeutic strategy for production of high-quality neurons in large quantity. Stem Cells 2014;32:998–1011
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Affiliation(s)
- Sun-Uk Kim
- Aging Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, Republic of Korea
- Department of Functional Genomics University of Science and Technology (UST), Daejeon, Republic of Korea
- National Primate Research Center, KRIBB, Chungcheongbuk-do, Republic of Korea
- Division of Life Sciences and Biotechnology Korea University, Seoul, Republic of Korea
| | - Young-Ho Park
- Aging Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, Republic of Korea
- Department of Functional Genomics University of Science and Technology (UST), Daejeon, Republic of Korea
- National Primate Research Center, KRIBB, Chungcheongbuk-do, Republic of Korea
| | - Jin-Man Kim
- Department of Pathology, College of Medicine Chungnam National University, Daejeon, Republic of Korea
| | - Hu-Nan Sun
- Aging Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, Republic of Korea
- College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing, China
| | - In-Sung Song
- Cardiovascular and Metabolic Disease Center Inje University, Busan, Republic of Korea
| | - Song Mei Huang
- Department of Pathology, College of Medicine Chungnam National University, Daejeon, Republic of Korea
| | - Sang-Hee Lee
- Department of Biological Sciences Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| | - Jung-Il Chae
- Department of Oral Pharmacology School of Dentistry and Institute of Dental Bioscience BK21 plus project, Chonbuk National University, Jeonju, Republic of Korea
| | - Su Hong
- Division of Life Sciences and Biotechnology Korea University, Seoul, Republic of Korea
| | - Sung Sik Choi
- Division of Life Sciences and Biotechnology Korea University, Seoul, Republic of Korea
| | - Seung-Cheol Choi
- Division of Life Sciences and Biotechnology Korea University, Seoul, Republic of Korea
| | - Tae-Hoon Lee
- Department of Oral Biochemistry, College of Dentistry Chonnam National University, Gwangju, Republic of Korea
| | - Sang Won Kang
- Division of Life and Pharmaceutical Sciences Ewha Womans University, Seoul, Republic of Korea
| | - Sue Goo Rhee
- Division of Life and Pharmaceutical Sciences Ewha Womans University, Seoul, Republic of Korea
| | - Kyu-Tae Chang
- National Primate Research Center, KRIBB, Chungcheongbuk-do, Republic of Korea
| | - Sang Ho Lee
- Division of Life Sciences and Biotechnology Korea University, Seoul, Republic of Korea
| | - Dae-Yeul Yu
- Aging Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, Republic of Korea
- Department of Functional Genomics University of Science and Technology (UST), Daejeon, Republic of Korea
| | - Dong-Seok Lee
- College of Natural Sciences BK21 plus project, Kyungpook National University, Daegu, Republic of Korea
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Lemcke H, Nittel ML, Weiss DG, Kuznetsov SA. Neuronal differentiation requires a biphasic modulation of gap junctional intercellular communication caused by dynamic changes of connexin43 expression. Eur J Neurosci 2013; 38:2218-28. [PMID: 23607708 DOI: 10.1111/ejn.12219] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Revised: 03/12/2013] [Accepted: 03/14/2013] [Indexed: 11/30/2022]
Abstract
It was suggested that gap junctional intercellular communication (GJIC) and connexin (Cx) proteins play a crucial role in cell proliferation and differentiation. However, the mechanisms of cell coupling in regulating cell fate during embryonic development are poorly understood. To study the role of GJIC in proliferation and differentiation, we used a human neural progenitor cell line derived from the ventral mesencephalon. Fluorescence recovery after photobleaching (FRAP) showed that dye coupling was extensive in proliferating cells but diminished after the induction of differentiation, as indicated by a 2.5-fold increase of the half-time of fluorescence recovery. Notably, recovery half-time decreased strongly (five-fold) in the later stage of differentiation. Western blot analysis revealed a similar time-dependent expression profile of Cx43, acting as the main gap junction-forming protein. Interestingly, large amounts of cytoplasmic Cx43 were retained mainly in the Golgi network during proliferation but decreased when differentiation was induced. Furthermore, down-regulation of Cx43 by small interfering RNA reduced functional cell coupling, which in turn resulted in a 50% decrease of both the proliferation rate and neuronal differentiation. Our findings suggest a dual function of Cx43 and GJIC in the neural development of ReNcell VM197 human progenitor cells. GJIC accompanied by high Cx43 expression is necessary (1) to maintain cells in a proliferative state and (2) to complete neuronal differentiation, including the establishment of a neural network. However, uncoupling of cells is crucial in the early stage of differentiation during cell fate commitment.
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Affiliation(s)
- Heiko Lemcke
- Department of Animal Physiology, Cell Biology and Biosystems Technology, Institute of Biological Sciences, University of Rostock, Albert-Einstein-Str. 3, D-18059, Rostock, Germany
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Liedmann A, Frech S, Morgan PJ, Rolfs A, Frech MJ. Differentiation of human neural progenitor cells in functionalized hydrogel matrices. Biores Open Access 2013; 1:16-24. [PMID: 23515105 PMCID: PMC3560381 DOI: 10.1089/biores.2012.0209] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Hydrogel-based three-dimensional (3D) scaffolds are widely used in the field of regenerative medicine, translational medicine, and tissue engineering. Recently, we reported the effect of scaffold formation on the differentiation and survival of human neural progenitor cells (hNPCs) using PuraMatrix™ (RADA-16) scaffolds. Here, we were interested in the impact of PuraMatrix modified by the addition of short peptide sequences, based on a bone marrow homing factor and laminin. The culture and differentiation of the hNPCs in the modified matrices resulted in an approximately fivefold increase in neuronal cells. The examination of apoptotic and necrotic cells, as well as the level of the anti-apoptotic protein Bcl-2, indicates benefits for cells hosted in the modified formulations. In addition, we found a trend to lower proportions of apoptotic or necrotic neuronal cells in the modified matrices. Interestingly, the neural progenitor cell pool was increased in all the tested matrices in comparison to the standard 2D culture system, while no difference was found between the modified matrices. We conclude that a combination of elevated neuronal differentiation and a protective effect of the modified matrices underlies the increased proportion of neuronal cells.
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Affiliation(s)
- Andrea Liedmann
- Albrecht-Kossel-Institute for Neuroregeneration, University of Rostock , Rostock, Germany
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40
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Zhang J, Li P, Wang Y, Liu J, Zhang Z, Cheng W, Wang Y. Ameliorative effects of a combination of baicalin, jasminoidin and cholic acid on ibotenic acid-induced dementia model in rats. PLoS One 2013; 8:e56658. [PMID: 23437202 PMCID: PMC3577735 DOI: 10.1371/journal.pone.0056658] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Accepted: 01/12/2013] [Indexed: 11/19/2022] Open
Abstract
Aims To investigate the therapeutic effects and acting mechanism of a combination of Chinese herb active components, i.e., a combination of baicalin, jasminoidin and cholic acid (CBJC) on Alzheimer’s disease (AD). Methods Male rats were intracerebroventricularly injected with ibotenic acid (IBO), and CBJC was orally administered. Therapeutic effect was evaluated with the Morris water maze test, FDG-PET examination, and histological examination, and the acting mechanism was studied with DNA microarrays and western blotting. Results CBJC treatment significantly attenuated IBO-induced abnormalities in cognition, brain functional images, and brain histological morphology. Additionally, the expression levels of 19 genes in the forebrain were significantly influenced by CBJC; approximately 60% of these genes were related to neuroprotection and neurogenesis, whereas others were related to anti-oxidation, protein degradation, cholesterol metabolism, stress response, angiogenesis, and apoptosis. Expression of these genes was increased, except for the gene related to apoptosis. Changes in expression for 5 of these genes were confirmed by western blotting. Conclusion CBJC can ameliorate the IBO-induced dementia in rats and may be significant in the treatment of AD. The therapeutic mechanism may be related to CBJC’s modulation of a number of processes, mainly through promotion of neuroprotection and neurogenesis, with additional promotion of anti-oxidation, protein degradation, etc.
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Affiliation(s)
- Junying Zhang
- School of Basic Medical Sciences, Lanzhou University, Lanzhou, P. R. China
- State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, P. R. China
| | - Peng Li
- The Laboratory Research Center of Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, P. R. China
| | - Yanping Wang
- The Institute of Basic Clinical Medicine, China Academy of Chinese Medical Sciences, Beijing, P. R. China
| | - Jianxun Liu
- The Laboratory Research Center of Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, P. R. China
| | - Zhanjun Zhang
- State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, P. R. China
- * E-mail:
| | - Weidong Cheng
- School of Basic Medical Sciences, Lanzhou University, Lanzhou, P. R. China
- * E-mail:
| | - Yongyan Wang
- The Institute of Basic Clinical Medicine, China Academy of Chinese Medical Sciences, Beijing, P. R. China
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41
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Franco C, Soares R, Pires E, Koci K, Almeida AM, Santos R, Coelho AV. Understanding regeneration through proteomics. Proteomics 2013; 13:686-709. [DOI: 10.1002/pmic.201200397] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Revised: 10/31/2012] [Accepted: 11/06/2012] [Indexed: 12/29/2022]
Affiliation(s)
- Catarina Franco
- Instituto de Tecnologia Química e Biológica; Universidade Nova de Lisboa; Oeiras Portugal
| | - Renata Soares
- Instituto de Tecnologia Química e Biológica; Universidade Nova de Lisboa; Oeiras Portugal
| | - Elisabete Pires
- Instituto de Tecnologia Química e Biológica; Universidade Nova de Lisboa; Oeiras Portugal
| | - Kamila Koci
- Instituto de Tecnologia Química e Biológica; Universidade Nova de Lisboa; Oeiras Portugal
| | - André M. Almeida
- Instituto de Tecnologia Química e Biológica; Universidade Nova de Lisboa; Oeiras Portugal
- Instituto de Investigação Científica Tropical; Lisboa Portugal
| | - Romana Santos
- Unidade de Investigação em Ciências Orais e Biomédicas, Faculdade de Medicina Dentária; Universidade de Lisboa; Portugal
| | - Ana Varela Coelho
- Instituto de Tecnologia Química e Biológica; Universidade Nova de Lisboa; Oeiras Portugal
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Akama K, Horikoshi T, Nakayama T, Otsu M, Imaizumi N, Nakamura M, Toda T, Inuma M, Hirano H, Kondo Y, Suzuki Y, Inoue N. Proteomic identification of differentially expressed genes during differentiation of cynomolgus monkey (Macaca fascicularis) embryonic stem cells to astrocyte progenitor cells in vitro. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2012; 1834:601-10. [PMID: 23232153 DOI: 10.1016/j.bbapap.2012.12.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Revised: 11/13/2012] [Accepted: 12/03/2012] [Indexed: 11/30/2022]
Abstract
Understanding astrocytogenesis is valuable for the treatment of nervous system disorders, as astrocytes provide structural, metabolic and defense support to neurons, and regulate neurons actively. However, there is limited information about the molecular events associated with the differentiation from primate ES cells to astrocytes. We therefore investigated the differentially expressed proteins in early astrocytogenesis, from cynomolgus monkey ES cells (CMK6 cell line) into astrocyte progenitor (AstP) cells via the formation of primitive neural stem spheres (Day 4), mature neural stem spheres (NSS), and neural stem (NS) cells in vitro, using two-dimensional gel electrophoresis (2-DE) and liquid chromatography-tandem mass spectrometry (LC-MS-MS). We identified 66 differentially expressed proteins involved in these five differentiation stages. Together with the results of Western blotting, RT-PCR, and a search of metabolic pathways related to the identified proteins, these results indicated that collapsin response mediator protein 2 (CRMP2), its phosphorylated forms, and cellular retinoic acid binding protein 1 (CRABP1) were upregulated from ES cells to Day 4 and NSS cells, to which differentiation stages apoptosis-associated proteins such as caspases were possibly related; Phosphorylated CRMP2s were further upregulated but CRABP1 was downregulated from NSS cells to NS cells, during which differentiation stage considerable axon guidance proteins for development of growth cones, axon attraction, and repulsion were possibly readied; Nonphosphorylated CRMP2 was downregulated but CRABP1 was re-upregulated from NS cells to AstP cells, in which differentiation stage reorganization of actin cytoskeleton linked to focal adhesion was possibly accompanied. These results provide insight into the molecular basis of early astrocytogenesis in monkey.
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Affiliation(s)
- Kuniko Akama
- Department of Chemistry, Graduate School of Science, Chiba University, Chiba 263-8522, Japan.
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Kim J, Jeon YJ, Kim HE, Shin JM, Chung HM, Chae JI. Comparative proteomic analysis of endothelial cells progenitor cells derived from cord blood- and peripheral blood for cell therapy. Biomaterials 2012; 34:1669-85. [PMID: 23218840 DOI: 10.1016/j.biomaterials.2012.11.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Accepted: 11/10/2012] [Indexed: 11/29/2022]
Abstract
Vasculopathy due to ischemia in damaged tissues is a major cause of morbidity and mortality. To treat these conditions, endothelial progenitor cells (EPCs) from various sources, such as umbilical cord or peripheral blood, have been the focus of the regenerative medicine field due to their proliferative and vasculogenic activities. However, the fundamental, molecular-level differences between EPCs obtained from different cellular sources have rarely been studied. In this study, we established endothelial progenitor cells derived from cord blood- and peripheral blood (CB- and PB-EPCs) and investigated their fundamental differences at the cellular and molecular levels through a combination of stem cell biology techniques and proteomic analysis. Our results suggest that specifically up-regulated factors such as STMIN 1, CFL 1, PARK 7, NME 1, GLO 1, HSP 27 and PRDX 2 in CB-EPCs as key elements that could be functionally active in ischemic regions. We also discussed functional behaviors important for inducing and maintaining long-lasting blood vessels under ischemic conditions. As a result, CB-EPCs retained a higher anti-oxidant and migration ability than PB-EPCs in vitro. Furthermore, CB-EPCs retained a higher therapeutic efficacy than PB-EPCs in a hindlimb ischemic disease model. The up-regulated expression pattern of STMIN 1, CFL 1, PARK 7, NME 1, GLO 1, HSP 27 and PRDX 2 was confirmed under several conditions in vitro and in vivo, indicating that the up-regulation of these molecules in CB-EPCs may be critical to the mechanism of healing in ischemic conditions and that CB-EPCs may be more appropriate for inducing neo-vessels. Thus, these results may aid in predetermining which cell sources will be of value for cell-based therapies of pathological conditions and identify several candidate molecules that may be involved in the therapeutic mechanism for ischemia.
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Affiliation(s)
- Jumi Kim
- CHA Bio & Diostech Co., Ltd., 606-16 Yeoksam 1 dong, Gangnam gu, Seoul 135-907, Republic of Korea
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44
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Maurer MH. Genomic and proteomic advances in autism research. Electrophoresis 2012; 33:3653-8. [PMID: 23160986 DOI: 10.1002/elps.201200382] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2012] [Revised: 07/31/2012] [Accepted: 08/06/2012] [Indexed: 01/10/2023]
Abstract
Recent studies suggest that adult neural stem cells (NSCs) may play a role in the pathogenesis of a number of the developmental disorders subsumed under the term autism spectrum disorders (ASD) that have in common impaired social interaction, communication deficits, and stereotypical behavior or interests. Since there is no "unifying hypothesis" about the etiology and pathogenesis of ASD, several factors have been associated with ASD, including genetic factors, physical co-morbidity, disturbances of brain structure and function, biochemical anomalies, cognitive impairment, and disorders of speech and emotional development, mostly the lack of empathy. Most of disturbances of brain interconnectivity are regarded as main problem in autism. Since NSCs have a distinct life cycle in the mammalian brain consisting of proliferation, migration, arborization, integration into existing neuronal circuits, and myelinization, disturbances in NSCs differentiation is thought to be deleterious. In the current review, I will summarize the results of genomic and proteomic studies finding susceptibility genes and proteins for autism with regard to NSCs differentiation and maturation.
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Affiliation(s)
- Martin H Maurer
- Department of Physiology and Pathophysiology, University of Heidelberg, Heidelberg, Germany.
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Survival of transplanted human neural stem cell line (ReNcell VM) into the rat brain with and without immunosuppression. Ann Anat 2012; 194:429-35. [DOI: 10.1016/j.aanat.2012.05.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2011] [Revised: 04/30/2012] [Accepted: 05/04/2012] [Indexed: 12/17/2022]
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Ostrakhovitch EA, Semenikhin OA. The role of redox environment in neurogenic development. Arch Biochem Biophys 2012; 534:44-54. [PMID: 22910298 DOI: 10.1016/j.abb.2012.08.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Revised: 07/19/2012] [Accepted: 08/03/2012] [Indexed: 10/28/2022]
Abstract
The dynamic changes of cellular redox elements during neurogenesis allow the control of specific programs for selective lineage progression. There are many redox couples that influence the cellular redox state. The shift from a reduced to an oxidized state and vice versa may act as a cellular switch mechanism of stem cell mode of action from proliferation to differentiation. The redox homeostasis ensures proper functioning of redox-sensitive signaling pathways through oxidation/reduction of critical cysteine residues on proteins involved in signal transduction. This review presents the current knowledge on the relation between changes in the cellular redox environment and stem cell programming in the course of commitment to a restricted neural lineage, focusing on in vivo neurogenesis and in vitro neuronal differentiation. The first two sections outline the main systems that control the intracellular redox environment and make it more oxidative or reductive. The last section provides the background on redox-sensitive signaling pathways that regulate neurogenesis.
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Affiliation(s)
- E A Ostrakhovitch
- Department of Chemistry, The University of Western Ontario, London, Ontario, Canada N6A 5B7.
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Pai S, Verrier F, Sun H, Hu H, Ferrie AM, Eshraghi A, Fang Y. Dynamic Mass Redistribution Assay Decodes Differentiation of a Neural Progenitor Stem Cell. ACTA ACUST UNITED AC 2012; 17:1180-91. [DOI: 10.1177/1087057112455059] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Stem cells hold great potential in drug discovery and development. However, challenges remain to quantitatively measure the functions of stem cells and their differentiated products. Here, we applied fluorescent imaging, quantitative real-time PCR, and label-free dynamic mass redistribution (DMR) assays to characterize the differentiation process of the ReNcell VM human neural progenitor stem cell. Immunofluorescence imaging showed that after growth factor withdrawal, the neuroprogenitor stem cell was differentiated into dopaminergic neurons, astrocytes, and oligodendrocytes, thus creating a neuronal cell system. High-performance liquid chromatography analysis showed that the differentiated cell system released dopamine upon depolarization with KCl. In conjunction with quantitative real-time PCR, DMR assays using a G-protein-coupled receptor agonist library revealed that a subset of receptors, including dopamine D1 and D4 receptors, underwent marked alterations in both receptor expression and signaling pathway during the differentiation process. These findings suggest that DMR assays can decode the differentiation process of stem cells at the cell system level.
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Affiliation(s)
- Sadashiva Pai
- Biochemical Technologies, Science and Technology Division, Corning Incorporated, Corning, NY, USA
| | - Florence Verrier
- Biochemical Technologies, Science and Technology Division, Corning Incorporated, Corning, NY, USA
| | - Haiyan Sun
- Biochemical Technologies, Science and Technology Division, Corning Incorporated, Corning, NY, USA
| | - Haibei Hu
- Biochemical Technologies, Science and Technology Division, Corning Incorporated, Corning, NY, USA
| | - Ann M. Ferrie
- Biochemical Technologies, Science and Technology Division, Corning Incorporated, Corning, NY, USA
| | - Azita Eshraghi
- Biochemical Technologies, Science and Technology Division, Corning Incorporated, Corning, NY, USA
| | - Ye Fang
- Biochemical Technologies, Science and Technology Division, Corning Incorporated, Corning, NY, USA
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48
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Novak A, Amit M, Ziv T, Segev H, Fishman B, Admon A, Itskovitz-Eldor J. Proteomics profiling of human embryonic stem cells in the early differentiation stage. Stem Cell Rev Rep 2012; 8:137-49. [PMID: 21732092 DOI: 10.1007/s12015-011-9286-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The regulatory pathways responsible for maintaining human embryonic stem cells (hESCs) in an undifferentiated state have yet to be elucidated. Since these pathways are thought to be governed by complex protein cues, deciphering the changes that occur in the proteomes of the ESCs during differentiation is important for understanding the expansion and differentiation processes involved. In this study, we present the first quantitative comparison of the hESC protein profile in the undifferentiated and early differentiated states. We used iTRAQ (isobaric tags for relative and absolute quantification) labeling combined with two dimensional capillary chromatography coupled with tandem mass spectrometry (μLC-MS/MS) to achieve comparative proteomics of hESCs at the undifferentiated stage, and at 6, 48, and 72 h after initiation of differentiation. In addition, two dimensional electrophoresis (2-DE) was performed on differentiating hESCs at eleven points of time during the first 72 h of differentiation. The results indicate that during the first 48 h of hESC differentiation, many processes are initiated and are later reversed, including chromatin remodeling, heterochromatin spreading, a decrease in transcription and translation, a decrease in glycolytic proteins and cytoskeleton remodeling, and a decrease in focal and cell adhesion. Only 72 h after differentiation induction did the expression of the homeobox prox1 protein increase, indicating the beginning of developmental processes.
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Affiliation(s)
- Atara Novak
- Sohnis and Forman Families Center for Stem Cell and Tissue Regeneration Research, Ruth & Bruce Rappaport Faculty of Medicine, Technion, Haifa, Israel
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Ethanol exposure alters protein expression in a mouse model of fetal alcohol spectrum disorders. INTERNATIONAL JOURNAL OF PROTEOMICS 2012; 2012:867141. [PMID: 22745907 PMCID: PMC3382221 DOI: 10.1155/2012/867141] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Revised: 04/01/2012] [Accepted: 04/01/2012] [Indexed: 11/18/2022]
Abstract
Alcohol exposure during development can result in variable growth retardation and facial dysmorphology known as fetal alcohol spectrum disorders. Although the mechanisms underlying the disorder are not fully understood, recent progress has been made that alcohol induces aberrant changes in gene expression and in the epigenome of embryos. To inform the gene and epigenetic changes in alcohol-induced teratology, we used whole-embryo culture to identify the alcohol-signature protein profile of neurulating C6 mice. Alcohol-treated and control cultures were homogenized, isoelectrically focused, and loaded for 2D gel electrophoresis. Stained gels were cross matched with analytical software. We identified 40 differentially expressed protein spots (P < 0.01), and 9 spots were selected for LC/MS-MS identification. Misregulated proteins include serotransferrin, triosephosphate isomerase and ubiquitin-conjugating enzyme E2 N. Misregulation of serotransferrin and triosephosphate isomerase was confirmed with immunologic analysis. Alteration of proteins with roles in cellular function, cell cycle, and the ubiquitin-proteasome pathway was induced by alcohol. Several misregulated proteins interact with effectors of the NF-κB and Myc transcription factor cascades. Using a whole-embryo culture, we have identified misregulated proteins known to be involved in nervous system development and function.
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Pavlica S, Milosevic J, Keller M, Schulze M, Peinemann F, Piscioneri A, De Bartolo L, Darsow K, Bartel S, Lange HA, Bader A. Erythropoietin enhances cell proliferation and survival of human fetal neuronal progenitors in normoxia. Brain Res 2012; 1452:18-28. [DOI: 10.1016/j.brainres.2012.02.043] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2011] [Revised: 02/10/2012] [Accepted: 02/17/2012] [Indexed: 12/11/2022]
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