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Li L, Wang L, Zhang L. Therapeutic Potential of Natural Compounds from Herbs and Nutraceuticals in Alleviating Neurological Disorders: Targeting the Wnt Signaling Pathway. J Agric Food Chem 2024; 72:2411-2433. [PMID: 38284360 DOI: 10.1021/acs.jafc.3c07536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
As an important signaling pathway in multicellular eukaryotes, the Wnt signaling pathway participates in a variety of physiological processes. Recent studies have confirmed that the Wnt signaling pathway plays an important role in neurological disorders such as stroke, Alzheimer's disease, and Parkinson's disease. The regulation of Wnt signaling by natural compounds in herbal medicines and nutraceuticals has emerged as a potential strategy for the development of new drugs for neurological disorders. Purpose: The aim of this review is to evaluate the latest research results on the efficacy of natural compounds derived from herbs and nutraceuticals in the prevention and treatment of neurological disorders by regulating the Wnt pathway in vivo and in vitro. A manual and electronic search was performed for English articles available from PubMed, Web of Science, and ScienceDirect from the January 2010 to February 2023. Keywords used for the search engines were "natural products,″ "plant derived products,″ "Wnt+ clinical trials,″ and "Wnt+,″ and/or paired with "natural products″/″plant derived products", and "neurological disorders." A total of 22 articles were enrolled in this review, and a variety of natural compounds from herbal medicine and nutritional foods have been shown to exert therapeutic effects on neurological disorders through the Wnt pathway, including curcumin, resveratrol, and querctrin, etc. These natural products possess antioxidant, anti-inflammatory, and angiogenic properties, confer neurovascular unit and blood-brain barrier integrity protection, and affect neural stem cell differentiation, synaptic formation, and neurogenesis, to play a therapeutic role in neurological disorders. In various in vivo and in vitro studies and clinical trials, these natural compounds have been shown to be safe and tolerable with few adverse effects. Natural compounds may serve a therapeutic role in neurological disorders by regulating the Wnt pathway. This summary of the research progress of natural compounds targeting the Wnt pathway may provide new insights for the treatment of neurological disorders and potential targets for the development of new drugs.
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Affiliation(s)
- Lei Li
- Department of Emergency Medicine, Shengjing Hospital of China Medical University, Shenyang 110000, Liaoning PR China
| | - Lin Wang
- Department of Emergency Medicine, Shengjing Hospital of China Medical University, Shenyang 110000, Liaoning PR China
| | - Lijuan Zhang
- Departments of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, No. 39 Huaxiang Road, Tiexi District, Shenyang 110000, Liaoning PR China
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Lin J, Lin Y, Zhu S, Luo J, Zhou C. Transplantation of Wnt3a-modified neural stem cells promotes neural regeneration and functional recovery after spinal cord injury via Wnt-Gli2 pathway. Neuroreport 2024; 35:27-36. [PMID: 37983663 DOI: 10.1097/wnr.0000000000001973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
Neural stem cell (NSCs) transplantation has great potential in the treatment of spinal cord injury (SCI). Previous studies have indicated that the Wnt pathway could regulate the expression of basic helix-loop-helix (bHLH) family factor Hes5 and Mash1 in NSCs, but not through the notch intracellular domain. This suggests that there are other signals involved in this process. The aim of this study was to investigate the role of Wnt-Gli2 pathway in the treatment of SCI by transplanting neural stem cells. NSCs were isolated from the striata of embryonic day 14 mice. Activation of the Wnt pathway was achieved using Wnt3a protein, while Gli2 was inhibited using Gli2-siRNA. Expression levels of Gli2 and bHLH factors were assessed using western blotting. NSCs proliferation was evaluated using CCK-8 assay, and neural differentiation was determined by immunofluorescence staining. Finally, the modified NSCs were transplanted into mice with SCI, and their effects were assessed using behavioral and histological tests. Our results demonstrated that Wnt3a promoted the expression of Mash1 through Gli2. Moreover, the expression of Ngn1 and Hes1 was up-regulated, while Hes5 was down-regulated. Wnt3a also promoted NSCs proliferation and neural differentiation through this signaling pathway. In vivo experiments showed that NSCs transplantation mediated by Wnt3a-Gli2 signaling increased the number of neurons and resulted in improved Basso Mouse Scale scores. In conclusion, our findings suggest that Gli2 plays a role in mediating the regulation of Wnt3a signaling on promoting NSCs proliferation and neural differentiation. This pathway is therefore important in NSCs-mediated SCI recovery.
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Affiliation(s)
- Jiezhao Lin
- Department of Spinal Surgery, Orthopedic Medical Center, Zhujiang Hospital, Southern Medical University, Guangzhou
| | - Yucong Lin
- Department of Spinal Surgery, Orthopedic Medical Center, Zhujiang Hospital, Southern Medical University, Guangzhou
| | - Shuangfang Zhu
- Department of Bone and Soft Tissue, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital and Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen, People's Republic of China
| | - Jinzhou Luo
- Department of Spinal Surgery, Orthopedic Medical Center, Zhujiang Hospital, Southern Medical University, Guangzhou
| | - Chusong Zhou
- Department of Spinal Surgery, Orthopedic Medical Center, Zhujiang Hospital, Southern Medical University, Guangzhou
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Patikas N, Ansari R, Metzakopian E. Single-cell transcriptomics identifies perturbed molecular pathways in midbrain organoids using α-synuclein triplication Parkinson's disease patient-derived iPSCs. Neurosci Res 2023; 195:13-28. [PMID: 37271312 DOI: 10.1016/j.neures.2023.06.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 05/26/2023] [Accepted: 06/01/2023] [Indexed: 06/06/2023]
Abstract
Three-dimensional (3D) brain organoids provide a platform to study brain development, cellular coordination, and disease using human tissue. Here, we generate midbrain dopaminergic (mDA) organoids from induced pluripotent stem cells (iPSC) from healthy and Parkinson's Disease (PD) donors and assess them as a human PD model using single-cell RNAseq. We characterize cell types in our organoid cultures and analyze our model's Dopamine (DA) neurons using cytotoxic and genetic stressors. Our study provides the first in-depth, single-cell analysis of SNCA triplication and shows evidence for molecular dysfunction in oxidative phosphorylation, translation, and ER protein-folding in DA neurons. We perform an in-silico identification of rotenone-sensitive DA neurons and characterization of corresponding transcriptomic profiles associated with synaptic signalling and cholesterol biosynthesis. Finally, we show a novel chimera organoid model from healthy and PD iPSCs allowing the study of DA neurons from different individuals within the same tissue.
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Affiliation(s)
- Nikolaos Patikas
- UK Dementia Research Institute, Department of Clinical Neurosciences, Cambridge Biomedical Campus, University of Cambridge, Cambridge CB2 0AH, UK.
| | - Rizwan Ansari
- UK Dementia Research Institute, Department of Clinical Neurosciences, Cambridge Biomedical Campus, University of Cambridge, Cambridge CB2 0AH, UK
| | - Emmanouil Metzakopian
- UK Dementia Research Institute, Department of Clinical Neurosciences, Cambridge Biomedical Campus, University of Cambridge, Cambridge CB2 0AH, UK.
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Zhang F, Li Q, Liang H, Zhang Y. Phosphofructokinase-1 Inhibition Promotes Neuronal Differentiation of Neural Stem Cells and Functional Recovery After Stroke. Neuroscience 2021; 459:27-38. [PMID: 33556456 DOI: 10.1016/j.neuroscience.2021.01.037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Revised: 01/27/2021] [Accepted: 01/29/2021] [Indexed: 12/14/2022]
Abstract
Ischemic stroke is a major cause of long-term disability. Neuronal differentiation of neural stem cells (NSCs) is crucial for brain repair after stroke. However, the underlying mechanisms remain unclear. Here, the role and potential mechanisms of phosphofructokinase-1 (PFK-1), the rate-limiting enzyme of glycolysis, was investigated in stroke using middle cerebral artery occlusion (MCAO) and oxygen-glucose deprivation models. We found that stroke increased the PFK-1 expression of NSCs. However, PFK-1 inhibition promoted neuronal differentiation of NSCs and facilitated the dendritic maturation of newborn neurons in vitro and in vivo. Moreover, PFK-1 inhibition also improved the spatial memory performance of MCAO rats. Additionally, we proved that the effect of PFK-1 inhibition above might be achieved by promoting β-catenin nuclear translocation and activating its downstream signaling, independent of Wnt signaling. Thus, these observations reveal a critical role of PFK-1 in stroke, which may provide a novel target for regenerative repair after stroke.
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Gao K, Niu J, Dang X. Wnt-3a improves functional recovery through autophagy activation via inhibiting the mTOR signaling pathway after spinal cord injury. Neurosci Lett 2020; 737:135305. [PMID: 32818590 DOI: 10.1016/j.neulet.2020.135305] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 08/11/2020] [Indexed: 11/15/2022]
Abstract
Little is known about the effect of wnt-3a on motor nerve function and its specific molecular mechanisms after spinal cord injury (SCI). This study demonstrates that the downregulated expression levels of caspases-3, caspases-9 and chondroitin sulfate proteoglycan (CSPG) proteins and number of proportion of transferase UTP nick end labeling (TUNEL)-positive neurons by wnt-3a treatment. Then, Nissl and hematoxylin-eosin (HE) staining showed that wnt-3a significantly reduced the loss of spinal anterior horn motor neurons and promoted repair of injured spinal cord tissues after SCI. The above factors constructed a favorable microenvironment for the recovery of motor nerve function after SCI. To elucidate the molecular mechanism of neuroprotection of wnt-3a on SCI, the study showed that the expression levels of Beclin-1 and light chain (LC)3-II/I in spinal cord neurons were significantly improved by wnt-3a after SCI in vitro and vivo experiments, while the effect of wnt-3a was inhibited after mechanistic target of rapamycin (mTOR) signaling pathway being activated by MHY-1485. Besides, the level of p70S6K phosphorylation was inhibited by wnt-3a treatment, on the contrary, the level of p70S6K protein was elevated by wnt-3a, indicating that wnt-3a significantly activated neuronal autophagy by inhibiting mTOR signaling pathway after SCI. To further verify the correlation between neuroprotection of wnt-3a and autophagy, we found that after the rats and spinal cord neurons were combined treatment with wnt-3a and MHY-1485, the neuroprotection of wnt-3a on SCI was significantly inhibited. This study is the first to report that wnt-3a improves functional recovery through autophagy activation via inhibiting the mTOR signaling pathway after SCI.
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Affiliation(s)
- Kai Gao
- Department of Orthopedics, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an Jiaotong University, Xi'an, China; Department of Orthopedics, Jining NO.1 People's Hospital, Jining, China.
| | - Jianbing Niu
- Department of Orthopedics, Jining NO.1 People's Hospital, Jining, China.
| | - Xiaoqian Dang
- Department of Orthopedics, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an Jiaotong University, Xi'an, China.
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Kierulf-Vieira KS, Sandberg CJ, Waaler J, Lund K, Skaga E, Saberniak BM, Panagopoulos I, Brandal P, Krauss S, Langmoen IA, Vik-Mo EO. A Small-Molecule Tankyrase Inhibitor Reduces Glioma Stem Cell Proliferation and Sphere Formation. Cancers (Basel) 2020; 12:cancers12061630. [PMID: 32575464 PMCID: PMC7352564 DOI: 10.3390/cancers12061630] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 06/13/2020] [Accepted: 06/16/2020] [Indexed: 12/19/2022] Open
Abstract
Evidence suggests that the growth and therapeutic resistance of glioblastoma (GBM) may be enabled by a population of glioma stem cells (GSCs) that are regulated by typical stem cell pathways, including the WNT/β-catenin signaling pathway. We wanted to explore the effect of treating GSCs with a small-molecule inhibitor of tankyrase, G007-LK, which has been shown to be a potent modulator of the WNT/β-catenin and Hippo pathways in colon cancer. Four primary GSC cultures and two primary adult neural stem cell cultures were treated with G007-LK and subsequently evaluated through the measurement of growth characteristics, as well as the expression of WNT/β-catenin and Hippo signaling pathway-related proteins and genes. Treatment with G007-LK decreased in vitro proliferation and sphere formation in all four primary GSC cultures in a dose-dependent manner. G007-LK treatment altered the expression of key downstream WNT/β-catenin and Hippo signaling pathway-related proteins and genes. Finally, cotreatment with the established GBM chemotherapeutic compound temozolomide (TMZ) led to an additive reduction in sphere formation, suggesting that WNT/β-catenin signaling may contribute to TMZ resistance. These observations suggest that tankyrase inhibition may serve as a supplement to current GBM therapy, although more work is needed to determine the exact downstream mechanisms involved.
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Affiliation(s)
- Kirsten Strømme Kierulf-Vieira
- Vilhelm Magnus Laboratory for Neurosurgical Research, Institute for Surgical Research and Department of Neurosurgery, Oslo University Hospital, P.O. Box 4950 Nydalen, 0424 Oslo, Norway; (C.J.S.); (E.S.); (B.M.S.); (I.A.L.); (E.O.V.-M.)
- Norwegian Stem Cell Center, Oslo University Hospital, University of Oslo, P.O. Box 1112 Blindern, 0317 Oslo, Norway
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, P.O. Box 1112 Blindern, 0317 Oslo, Norway
- Correspondence:
| | - Cecilie Jonsgar Sandberg
- Vilhelm Magnus Laboratory for Neurosurgical Research, Institute for Surgical Research and Department of Neurosurgery, Oslo University Hospital, P.O. Box 4950 Nydalen, 0424 Oslo, Norway; (C.J.S.); (E.S.); (B.M.S.); (I.A.L.); (E.O.V.-M.)
- Norwegian Stem Cell Center, Oslo University Hospital, University of Oslo, P.O. Box 1112 Blindern, 0317 Oslo, Norway
| | - Jo Waaler
- Department of Immunology and Transfusion Medicine, Oslo University Hospital, P.O. Box 4950 Nydalen, 0424 Oslo, Norway; (J.W.); (K.L.); (S.K.)
- Hybrid Technology Hub-Centre of Excellence, Institute of Basic Medical Sciences, University of Oslo, P.O. Box 1110 Blindern, 0317 OSLO, Norway
| | - Kaja Lund
- Department of Immunology and Transfusion Medicine, Oslo University Hospital, P.O. Box 4950 Nydalen, 0424 Oslo, Norway; (J.W.); (K.L.); (S.K.)
- Hybrid Technology Hub-Centre of Excellence, Institute of Basic Medical Sciences, University of Oslo, P.O. Box 1110 Blindern, 0317 OSLO, Norway
| | - Erlend Skaga
- Vilhelm Magnus Laboratory for Neurosurgical Research, Institute for Surgical Research and Department of Neurosurgery, Oslo University Hospital, P.O. Box 4950 Nydalen, 0424 Oslo, Norway; (C.J.S.); (E.S.); (B.M.S.); (I.A.L.); (E.O.V.-M.)
- Norwegian Stem Cell Center, Oslo University Hospital, University of Oslo, P.O. Box 1112 Blindern, 0317 Oslo, Norway
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, P.O. Box 1112 Blindern, 0317 Oslo, Norway
| | - Birthe Mikkelsen Saberniak
- Vilhelm Magnus Laboratory for Neurosurgical Research, Institute for Surgical Research and Department of Neurosurgery, Oslo University Hospital, P.O. Box 4950 Nydalen, 0424 Oslo, Norway; (C.J.S.); (E.S.); (B.M.S.); (I.A.L.); (E.O.V.-M.)
- Norwegian Stem Cell Center, Oslo University Hospital, University of Oslo, P.O. Box 1112 Blindern, 0317 Oslo, Norway
| | - Ioannis Panagopoulos
- Section for Cancer Cytogenetics, Institute for Cancer Genetics and Informatics, The Norwegian Radium Hospital, Oslo University Hospital, Montebello, P.O. Box 49534 Nydalen, 0424 Oslo, Norway; (I.P.); (P.B.)
| | - Petter Brandal
- Section for Cancer Cytogenetics, Institute for Cancer Genetics and Informatics, The Norwegian Radium Hospital, Oslo University Hospital, Montebello, P.O. Box 49534 Nydalen, 0424 Oslo, Norway; (I.P.); (P.B.)
- Department of Oncology, The Norwegian Radium Hospital, Oslo University Hospital, Montebello, P.O. Box 49534 Nydalen, 0424 Oslo, Norway
- Centre for Cancer Biomedicine, Faculty of Medicine, University of Oslo, P.O. Box 1112 Blindern, 0317 Oslo, Norway
| | - Stefan Krauss
- Department of Immunology and Transfusion Medicine, Oslo University Hospital, P.O. Box 4950 Nydalen, 0424 Oslo, Norway; (J.W.); (K.L.); (S.K.)
- Hybrid Technology Hub-Centre of Excellence, Institute of Basic Medical Sciences, University of Oslo, P.O. Box 1110 Blindern, 0317 OSLO, Norway
| | - Iver Arne Langmoen
- Vilhelm Magnus Laboratory for Neurosurgical Research, Institute for Surgical Research and Department of Neurosurgery, Oslo University Hospital, P.O. Box 4950 Nydalen, 0424 Oslo, Norway; (C.J.S.); (E.S.); (B.M.S.); (I.A.L.); (E.O.V.-M.)
- Norwegian Stem Cell Center, Oslo University Hospital, University of Oslo, P.O. Box 1112 Blindern, 0317 Oslo, Norway
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, P.O. Box 1112 Blindern, 0317 Oslo, Norway
- Centre for Cancer Biomedicine, Faculty of Medicine, University of Oslo, P.O. Box 1112 Blindern, 0317 Oslo, Norway
- Department of Neurosurgery, Oslo University Hospital, P.O. Box 4950 Nydalen, 0424 Oslo, Norway
| | - Einar Osland Vik-Mo
- Vilhelm Magnus Laboratory for Neurosurgical Research, Institute for Surgical Research and Department of Neurosurgery, Oslo University Hospital, P.O. Box 4950 Nydalen, 0424 Oslo, Norway; (C.J.S.); (E.S.); (B.M.S.); (I.A.L.); (E.O.V.-M.)
- Norwegian Stem Cell Center, Oslo University Hospital, University of Oslo, P.O. Box 1112 Blindern, 0317 Oslo, Norway
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, P.O. Box 1112 Blindern, 0317 Oslo, Norway
- Centre for Cancer Biomedicine, Faculty of Medicine, University of Oslo, P.O. Box 1112 Blindern, 0317 Oslo, Norway
- Department of Neurosurgery, Oslo University Hospital, P.O. Box 4950 Nydalen, 0424 Oslo, Norway
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Zhang JW, Ma YM, Jing L, Wang YL, Zhang JZ. Synaptic remodeling and reduced expression of the transcription factors, HES1 and HES5, in the cortex neurons of cognitively impaired hyperhomocysteinemic mice. Pathol Res Pract 2020; 216:152953. [PMID: 32345540 DOI: 10.1016/j.prp.2020.152953] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 03/17/2020] [Accepted: 03/29/2020] [Indexed: 11/22/2022]
Abstract
Hyperhomocysteinemia (HHcy) is associated with cognitive impairment and neurodegenerative diseases. The synaptic ultrastructure and the expression of hairy enhancer of split (HES) genes are involved in cognitive impairment induced by HHcy, but their precise role remains unclear. The present study aimed to measure synaptic remodeling and the expression of HES1 and HES5 in the cortex neurons of mice with HHcy to clarify their role in cognitive impairment. Mild HHcy was induced in ApoE-/- mice receiving a high-methionine diet. The correct response percentage, latency, and distance traveled in the mice with HHcy decreased compared with those of non-HHcy control mice (P < 0.05). There was no difference in the neuronal counts and the mean optical density of Nissl bodies in the frontal cortex of HHcy and non-HHcy mice. Increased apoptosis rates and numbers of autophagosomes were observed in the HHcy mice by TUNEL staining and electron microscopy, respectively, compared to those in the control group (P < 0.05). There was a significant increase in the area of postsynaptic density and size variation of synaptic vesicles in the HHcy group compared to that in the control (P < 0.05). Decreased expression of HES1 and HES5 was observed by western blotting and immunostaining in the HHcy group compared to that in the control (P < 0.05). Collectively, these results suggest that increased autophagy, apoptosis, synaptic remodeling, and downregulation of hes1 and hes5 are involved in the cognitive impairment induced by hyperhomocysteinemia.
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Cheng J, Shen W, Jin L, Pan J, Zhou Y, Pan G, Xie Q, Hu Q, Wu S, Zhang H, Chen X. Treadmill exercise promotes neurogenesis and myelin repair via upregulating Wnt/β‑catenin signaling pathways in the juvenile brain following focal cerebral ischemia/reperfusion. Int J Mol Med 2020; 45:1447-1463. [PMID: 32323740 PMCID: PMC7138282 DOI: 10.3892/ijmm.2020.4515] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Accepted: 01/20/2020] [Indexed: 12/15/2022] Open
Abstract
Physical exercise has a neuroprotective effect and is an important treatment after ischemic stroke. Promoting neurogenesis and myelin repair in the penumbra is an important method for the treatment of ischemic stroke. However, the role and potential mechanism of exercise in neurogenesis and myelin repair still needs to be clarified. The goal of the present study was to ascertain the possible effect of treadmill training on the neuroprotective signaling pathway in juvenile rats after ischemic stroke. The model of middle cerebral artery occlusion (MCAO) in juvenile rats was established and then the rats were randomly divided into 9 groups. XAV939 (an inhibitor of the Wnt/β‑catenin pathway) was used to confirm the effects of the Wnt/β‑catenin signaling pathway on exercise‑mediated neurogenesis and myelin repair. Neurological deficits were detected by modified neurological severity score, the injury of brain tissue and the morphology of neurons was detected by hematoxylin‑eosin staining and Nissl staining, and the infarct volume was detected by 2,3,5‑triphenyl tetrazolium chloride staining. The changes in myelin were observed by Luxol fast blue staining. The neuron ultrastructure was observed by transmission electron microscopy. Immunofluorescence and western blots analyzed the molecular mechanisms. The results showed that treadmill exercise improved neurogenesis, enhanced myelin repair, promoted neurological function recovery and reduced infarct volume. These were the results of the upregulation of Wnt3a and nucleus β‑catenin, brain‑derived neurotrophic factor (BDNF) and myelin basic protein (MBP). In addition, XAV939 inhibited treadmill exercise‑induced neurogenesis and myelin repair, which was consistent with the downregulation of Wnt3a, nucleus β‑catenin, BDNF and MBP expression, and the deterioration of neurological function. In summary, treadmill exercise promotes neurogenesis and myelin repair by upregulating the Wnt/β‑catenin signaling pathway, to improve the neurological deficit caused by focal cerebral ischemia/reperfusion.
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Affiliation(s)
- Jingyan Cheng
- Physical Medicine and Rehabilitation Center, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Weimin Shen
- Physical Medicine and Rehabilitation Center, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Lingqin Jin
- Physical Medicine and Rehabilitation Center, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Juanjuan Pan
- Physical Medicine and Rehabilitation Center, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Yan Zhou
- Physical Medicine and Rehabilitation Center, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Guoyuan Pan
- Physical Medicine and Rehabilitation Center, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Qingfeng Xie
- Physical Medicine and Rehabilitation Center, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Quan Hu
- Physical Medicine and Rehabilitation Center, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Shamin Wu
- Physical Medicine and Rehabilitation Center, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Hongmei Zhang
- Nursing Department, Hangzhou Children's Hospital, Hangzhou, Zhejiang 310000, P.R. China
| | - Xiang Chen
- Physical Medicine and Rehabilitation Center, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
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10
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Niapour A, Ghasemi Hamidabadi H, Niapour N, Mohammadi P, Sharifi Pasandi M, Malekzadeh V. Pharmacological Notch pathway inhibition leads to cell cycle arrest and stimulates ascl1 and neurogenin2 genes expression in dental pulp stem cells-derived neurospheres. Biotechnol Lett 2019; 41:873-887. [PMID: 31073804 DOI: 10.1007/s10529-019-02687-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 05/05/2019] [Indexed: 02/06/2023]
Abstract
OBJECTIVE Human dental pulp-derived stem cells (hDPSCs) are becoming an attractive source for cell-based neurorestorative therapies. As such, it is important to understand the molecular mechanisms that regulate the differentiation of hDPSCs toward the neuronal fate. Notch signaling plays key roles in neural stem/progenitor cells (NS/PCs) maintenance and prevention of their differentiation. The aim of this study was to address the effects of Notch signaling inhibition on neurosphere formation of hDPSCs and neuronal differentiation of hDPSCs-neurospheres. RESULTS hDPSCs were isolated from third molar teeth. The cultivated hDPSCs highly expressed CD90 and CD44 and minimally presented CD34 and CD45 surface markers. The osteo/adipogenic differentiation of hDPSCs was documented. hDPSCs were cultured in neural induction medium and N-[N-(3,5-difluorophenacetyl-L-alanyl)]-Sphenylglycine t-butyl ester (DAPT) was applied to impede Notch signaling during transformation into spheres or on the formed neurospheres. Our results showed that the size and number of neurospheres decreased and the expression profile of nestin, sox1 and pax6 genes reduced provided DAPT. Treatment of the formed neurospheres with DAPT resulted in the cleaved Notch1 reduction, G0/G1 arrest and a decline in L-lactate production. DAPT significantly reduced hes1 and hey1 genes, while ascl1 and neurogenin2 expressions augmented. The number of MAP2 positive cells improved in the DAPT-treated group. CONCLUSIONS Our findings demonstrated the Notch activity in hDPSCs-neurospheres. DAPT treatment positively regulated proneural genes expression and increased neuronal-like differentiation.
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Affiliation(s)
- Ali Niapour
- Research Laboratory for Embryology and Stem Cells, Department of Anatomical Sciences, School of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran.
| | - Hatef Ghasemi Hamidabadi
- Department of Anatomy and Cell Biology, Immunogenetic Research Center, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran.,Department of Anatomy & Cell Biology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Nazila Niapour
- Research Laboratory for Embryology and Stem Cells, Department of Anatomical Sciences, School of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Perham Mohammadi
- Department of Pharmacology and Toxicology, School of Pharmacy, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Marzieh Sharifi Pasandi
- Molecular and Cell Biology Research Center, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Vadoud Malekzadeh
- Research Laboratory for Embryology and Stem Cells, Department of Anatomical Sciences, School of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran
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11
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Brennan S, Keon M, Liu B, Su Z, Saksena NK. Panoramic Visualization of Circulating MicroRNAs Across Neurodegenerative Diseases in Humans. Mol Neurobiol 2019; 56:7380-7407. [PMID: 31037649 PMCID: PMC6815273 DOI: 10.1007/s12035-019-1615-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Accepted: 04/15/2019] [Indexed: 12/12/2022]
Abstract
Neurodegenerative diseases (NDs) such as Alzheimer’s disease (AD), Parkinson’s disease (PD), multiple sclerosis (MS), amyotrophic lateral sclerosis (ALS), and dementia pose one of the greatest health challenges this century. Although these NDs have been looked at as single entities, the underlying molecular mechanisms have never been collectively visualized to date. With the advent of high-throughput genomic and proteomic technologies, we now have the opportunity to visualize these diseases in a whole new perspective, which will provide a clear understanding of the primary and secondary events vital in achieving the final resolution of these diseases guiding us to new treatment strategies to possibly treat these diseases together. We created a knowledge base of all microRNAs known to be differentially expressed in various body fluids of ND patients. We then used several bioinformatic methods to understand the functional intersections and differences between AD, PD, ALS, and MS. These results provide a unique panoramic view of possible functional intersections between AD, PD, MS, and ALS at the level of microRNA and their cognate genes and pathways, along with the entities that unify and separate them. While the microRNA signatures were apparent for each ND, the unique observation in our study was that hsa-miR-30b-5p overlapped between all four NDS, and has significant functional roles described across NDs. Furthermore, our results also show the evidence of functional convergence of miRNAs which was associated with the regulation of their cognate genes represented in pathways that included fatty acid synthesis and metabolism, ECM receptor interactions, prion diseases, and several signaling pathways critical to neuron differentiation and survival, underpinning their relevance in NDs. Envisioning this group of NDs together has allowed us to propose new ways of utilizing circulating miRNAs as biomarkers and in visualizing diverse NDs more holistically . The critical molecular insights gained through the discovery of ND-associated miRNAs, overlapping miRNAs, and the functional convergence of microRNAs on vital pathways strongly implicated in neurodegenerative processes can prove immensely valuable in the identifying new generation of biomarkers, along with the development of miRNAs into therapeutics.
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Affiliation(s)
- Samuel Brennan
- Neurodegenerative Disease section, Iggy Get Out, 19a Boundary Street, Darlinghurst NSW 2010, Sydney, Australia
| | - Matthew Keon
- Neurodegenerative Disease section, Iggy Get Out, 19a Boundary Street, Darlinghurst NSW 2010, Sydney, Australia
| | - Bing Liu
- Neurodegenerative Disease section, Iggy Get Out, 19a Boundary Street, Darlinghurst NSW 2010, Sydney, Australia
| | - Zheng Su
- Neurodegenerative Disease section, Iggy Get Out, 19a Boundary Street, Darlinghurst NSW 2010, Sydney, Australia
| | - Nitin K. Saksena
- Neurodegenerative Disease section, Iggy Get Out, 19a Boundary Street, Darlinghurst NSW 2010, Sydney, Australia
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12
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Pan JP, Hu Y, Wang JH, Xin YR, Jiang JX, Chen KQ, Yang CY, Gao Q, Xiao F, Yan L, Luo HM. Methyl 3,4-Dihydroxybenzoate Induces Neural Stem Cells to Differentiate Into Cholinergic Neurons in vitro. Front Cell Neurosci 2018; 12:478. [PMID: 30581378 PMCID: PMC6292956 DOI: 10.3389/fncel.2018.00478] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Accepted: 11/22/2018] [Indexed: 01/08/2023] Open
Abstract
Neural stem cells (NSCs) have been shown as a potential source for replacing degenerated neurons in neurodegenerative diseases. However, the therapeutic potential of these cells is limited by the lack of effective methodologies for controlling their differentiation. Inducing endogenous pools of NSCs by small molecule can be considered as a potential approach of generating the desired cell types in large numbers. Here, we reported the characterization of a small molecule (Methyl 3,4-dihydroxybenzoate; MDHB) that selectively induces hippocampal NSCs to differentiate into cholinergic motor neurons which expressed synapsin 1 (SYN1) and postsynaptic density protein 95 (PSD-95). Studies on the mechanisms revealed that MDHB induced the hippocampal NSCs differentiation into cholinergic motor neurons by inhibiting AKT phosphorylation and activating autophosphorylation of GSK3β at tyrosine 216. Furthermore, we found that MDHB enhanced β-catenin degradation and abolished its entering into the nucleus. Collectively, this report provides the strong evidence that MDHB promotes NSCs differentiation into cholinergic motor neurons by enhancing gene Isl1 expression and inhibiting cell cycle progression. It may provide a basis for pharmacological effects of MDHB directed on NSCs.
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Affiliation(s)
- Jun-Ping Pan
- Department of Pharmacology, College of Basic Medicine, Jinan University, Guangzhou, China.,Department of Neurosurgery, Guangzhou Women and Children's Medical Center, Guangzhou, China
| | - Yang Hu
- Department of Pharmacology, College of Basic Medicine, Jinan University, Guangzhou, China.,Institute of Brain Sciences, Jinan University, Guangzhou, China
| | - Jia-Hui Wang
- Department of Pharmacology, College of Basic Medicine, Jinan University, Guangzhou, China
| | - Yi-Rong Xin
- Department of Pharmacology, College of Basic Medicine, Jinan University, Guangzhou, China
| | - Jun-Xing Jiang
- Department of Pharmacology, College of Basic Medicine, Jinan University, Guangzhou, China
| | - Ke-Qi Chen
- Department of Pharmacology, College of Basic Medicine, Jinan University, Guangzhou, China
| | - Cheng-You Yang
- Department of Neurosurgery, The First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Qin Gao
- Department of Pharmacology, College of Basic Medicine, Jinan University, Guangzhou, China
| | - Fei Xiao
- Department of Pharmacology, College of Basic Medicine, Jinan University, Guangzhou, China.,Institute of Brain Sciences, Jinan University, Guangzhou, China
| | - Li Yan
- Guangzhou Quality R&D Center of Traditional Chinese Medicine, Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Huan-Min Luo
- Department of Pharmacology, College of Basic Medicine, Jinan University, Guangzhou, China.,Institute of Brain Sciences, Jinan University, Guangzhou, China
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13
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Wei ZZ, Zhang JY, Taylor TM, Gu X, Zhao Y, Wei L. Neuroprotective and regenerative roles of intranasal Wnt-3a administration after focal ischemic stroke in mice. J Cereb Blood Flow Metab 2018; 38:404-421. [PMID: 28430000 PMCID: PMC5851145 DOI: 10.1177/0271678x17702669] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 02/27/2017] [Accepted: 03/01/2017] [Indexed: 01/31/2023]
Abstract
Wnt signaling is a conserved pathway involved in expansion of neural progenitors and lineage specification during development. However, the role of Wnt signaling in the post-stroke brain has not been well-elucidated. We hypothesized that Wnt-3a would play an important role for neurogenesis and brain repair. Adult male mice were subjected to a focal ischemic stroke targeting the sensorimotor cortex. Mice that received Wnt-3a (2 µg/kg/day, 1 h after stroke and once a day for the next 2 days, intranasal delivery) had reduced infarct volume compared to stroke controls. Wnt-3a intranasal treatment of seven days upregulated the expression of brain-derived growth factor (BDNF), increased the proliferation and migration of neuroblasts from the subventricular zone (SVZ), resulting in increased numbers of newly formed neurons and endothelial cells in the peri-infarct zone. Both the molecular and cellular effects of Wnt-3a were blocked by the Wnt specific inhibitors XAV-939 or Dkk-1. In functional assays, Wnt-3a treatment enhanced the local cerebral blood flow (LCBF) in the peri-infarct, as well as improved sensorimotor functions in a battery of behavioral tests. Together, our data demonstrates that the Wnt-3a signaling can act as a dual neuroprotective and regenerative factor for the treatment of ischemic stroke.
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Affiliation(s)
- Zheng Zachory Wei
- Laboratories of Stem Cell Biology and Regenerative Medicine, Experimental Research Center and Neurological Disease Center, Beijing Friendship Hospital, Capital Medical University, Beijing, China
- Department of Anesthesiology, Emory University School of Medicine, Atlanta, GA, USA
| | - James Ya Zhang
- Department of Anesthesiology, Emory University School of Medicine, Atlanta, GA, USA
| | - Tammi M Taylor
- Department of Anesthesiology, Emory University School of Medicine, Atlanta, GA, USA
| | - Xiaohuan Gu
- Department of Anesthesiology, Emory University School of Medicine, Atlanta, GA, USA
| | - Yingying Zhao
- Laboratories of Stem Cell Biology and Regenerative Medicine, Experimental Research Center and Neurological Disease Center, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Ling Wei
- Laboratories of Stem Cell Biology and Regenerative Medicine, Experimental Research Center and Neurological Disease Center, Beijing Friendship Hospital, Capital Medical University, Beijing, China
- Department of Anesthesiology, Emory University School of Medicine, Atlanta, GA, USA
- Department of Neurology, Emory University School of Medicine, Atlanta, GA, USA
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14
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Abstract
The repair of central nervous system (CNS) injury has been a worldwide problem in the biomedical field. How to reduce the damage to the CNS and promote the reconstruction of the damaged nervous system structure and function recovery has always been the concern of nerve tissue engineering. Multiple differentiation potentials of neural stem cell (NSC) determine the application value for the repair of the CNS injury. Thus, how to regulate the behavior of NSCs becomes the key to treating the CNS injury. So far, a large number of researchers have devoted themselves to searching for a better way to regulate the behavior of NSCs. This paper summarizes the effects of different factors on the behavior of NSCs in the past 10 years, especially on the proliferation and differentiation of NSCs. The final purpose of this review is to provide a more detailed theoretical basis for the clinical repair of the CNS injury by nerve tissue engineering.
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Affiliation(s)
- Lixiang Huang
- Department of Chemistry and Biology, College of Science, National University of Defense Technology, Changsha, Hunan 410073, China
| | - Gan Wang
- Department of Chemistry and Biology, College of Science, National University of Defense Technology, Changsha, Hunan 410073, China
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15
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An M, Shen H, Cao J, Pei X, Chang Y, Ma S, Bao J, Zhang X, Bai X, Ma Y. The alteration of H4-K16ac and H3-K27met influences the differentiation of neural stem cells. Anal Biochem 2016; 509:92-99. [PMID: 27396496 DOI: 10.1016/j.ab.2016.07.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 06/20/2016] [Accepted: 07/05/2016] [Indexed: 10/21/2022]
Abstract
The neural stem cell therapy provides a promising future for patients with central nerve system damage, thus an insight into its differentiation mechanism is urgently needed. Herein, we aimed to identify various histone modifications and reveal their impact on the differentiation of neural stem cells (NSCs) toward neurons. Firstly, we labeled primary NSCs using the stable isotope labeling with amino acids in cell culture (SILAC) technique. Then we induced these NSCs to differentiate by all-trans retinoic acid (atRA) or SB216763. Next, we identified the alteration of histone modifications in early-differentiated NSCs by mass spectrometry and verified them by Western blot. Interestingly, these modification alterations and phenotype changes were found similar in NSCs induced by the two different drugs. More interestingly, during the differentiation process H3-K27met was significantly up-regulated while H4-K16ac was not altered at the global level but down-regulated in some low-abundance combinatorial codes. We inhibited the methyltransferase of H3-K27 and deacetylase of H4-K16 simultaneously and found the differentiation procedure was obviously delayed. The function of H4-K16ac and H3-K27met in NSCs differentiation would be useful to reveal the differentiation mechanism and valuable for further neural stem cell therapy.
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Affiliation(s)
- Mingrui An
- Department of Surgery and Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA 90048, United States; Department of Surgery, University of Michigan Medical Center, Ann Arbor, MI, 48109, United States.
| | - Hongyan Shen
- Key Laboratory of Genomics and Precision Medicine, China Gastrointestinal Cancer Research Center, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, 100101, China.
| | - Jun Cao
- College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, 310036, China.
| | - Xiucong Pei
- Department of Toxicology, School of Public Health, Shenyang Medical College, Liaoning, 110034, China.
| | - Yanxu Chang
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, China.
| | - Shuaipeng Ma
- State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Peking University, Beijing, 100871, China.
| | - Jintao Bao
- State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Peking University, Beijing, 100871, China.
| | - Xuefei Zhang
- State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Peking University, Beijing, 100871, China.
| | - Xue Bai
- State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Peking University, Beijing, 100871, China.
| | - Yuanhui Ma
- State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Peking University, Beijing, 100871, China.
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16
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Abstract
data indicates that arsenic exposure inhibits stem cell differentiation. This study investigated whether arsenic disrupted the Wnt3a signaling pathway, critical in the formation of myotubes and neurons, during the differentiation in P19 mouse embryonic stem cells. Cells were exposed to 0, 0.1, or 0.5 μM arsenite, with or without exogenous Wnt3a, for up to 9 days of differentiation. Arsenic exposure alone inhibits the differentiation of stem cells into neurons and skeletal myotubes, and reduces the expression of both β-catenin and GSK3β mRNA to ~55% of control levels. Co-culture of the arsenic-exposed cells with exogenous Wnt3a rescues the morphological phenotype, but does not alter transcript, protein, or phosphorylation status of GSK3β or β-catenin. However, arsenic exposure maintains high levels of Hes5 and decreases the expression of MASH1 by 2.2-fold, which are anti- and pro-myogenic and neurogenic genes, respectively, in the Notch signaling pathway. While rescue with exogenous Wnt3a reduced Hes5 levels, MASH1 levels stay repressed. Thus, while Wnt3a can partially rescue the inhibition of differentiation from arsenic, it does so by also modulating Notch target genes rather than only working through the canonical Wnt signaling pathway. These results indicate that arsenic alters the interplay between multiple signaling pathways, leading to reduced stem cell differentiation.
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Affiliation(s)
- Lisa J Bain
- Environmental Toxicology Graduate Program, Clemson University, 132 Long Hall, Clemson, SC 29634, USA; Department of Biological Sciences, Clemson University, 132 Long Hall, Clemson, SC 23964, USA
| | - Jui-Tung Liu
- Environmental Toxicology Graduate Program, Clemson University, 132 Long Hall, Clemson, SC 29634, USA
| | - Ryan E League
- Environmental Toxicology Graduate Program, Clemson University, 132 Long Hall, Clemson, SC 29634, USA
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17
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Gnanasegaran N, Govindasamy V, Musa S, Abu Kasim NH. ReNCell VM conditioned medium enhances the induction of dental pulp stem cells into dopaminergic like cells. Cytotechnology 2014; 68:343-53. [PMID: 25322895 DOI: 10.1007/s10616-014-9787-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Accepted: 09/13/2014] [Indexed: 12/21/2022] Open
Abstract
Among the debilitating diseases, neurological related diseases are the most challenging ones to be treated using cell replacement therapies. Recently, dental pulp stem cells (SHED) were found to be most suitable cell choice for neurological related diseases as evidenced with many preclinical studies. To enhance the neurological potential of SHED, we recapitulated one of the pharmacological therapeutic tools in cell replacement treatment, we pre-conditioned dental pulp stem cells (SHED) with culture medium of ReNCell VM, an immortalized neuron progenitor cell, prior to neurogenesis induction and investigated whether this practice enhances their neurogenesis potential especially towards dopaminergic neurons. We hypothesed that the integration of pharmacological practices such as co-administration of various drugs, a wide range of doses and duration as well as pre-conditioning into cell replacement may enhance the efficacy of stem cell therapy. In particular, pre-conditioning is shown to be involved in the protective effect from some membrano-tropic drugs, thereby improving the resistance of cell structures and homing capabilities. We found that cells pre-treated with ReNCell VM conditioned medium displayed bipolar structures with extensive branches resembling putative dopaminergic neurons as compared to non-treated cells. Furthermore, many neuronal related markers such as NES, NR4A2, MSI1, and TH were highly expressed (fold changes > 2; p < 0.05) in pre-treated cells. Similar observations were detected at the protein level. The results demonstrate for the first time that SHED pre-conditioning enhances neurological potential and we suggest that cells should be primed to their respective environment prior to transplantation.
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Affiliation(s)
- Nareshwaran Gnanasegaran
- cGMP-Compliant Stem Cell Laboratory, Hygieia Innovation Sdn. Bhd, Lot 1G-2G, Lanai Complex No. 2, Persiaran Seri Perdana, Precinct 10, 62250, Federal Territory of Putrajaya, Malaysia.,Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
| | - Vijayendran Govindasamy
- cGMP-Compliant Stem Cell Laboratory, Hygieia Innovation Sdn. Bhd, Lot 1G-2G, Lanai Complex No. 2, Persiaran Seri Perdana, Precinct 10, 62250, Federal Territory of Putrajaya, Malaysia.
| | - Sabri Musa
- Department of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
| | - Noor Hayaty Abu Kasim
- Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
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18
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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