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Qiu JJ, Liu YN, Wei H, Zeng F, Yan JB. Single-cell RNA sequencing of neural stem cells derived from human trisomic iPSCs reveals the abnormalities during neural differentiation of Down syndrome. Front Mol Neurosci 2023; 16:1137123. [PMID: 37396785 PMCID: PMC10311021 DOI: 10.3389/fnmol.2023.1137123] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 05/22/2023] [Indexed: 07/04/2023] Open
Abstract
Introduction Down syndrome (DS) is the most common genetic condition that causes intellectual disability in humans. The molecular mechanisms behind the DS phenotype remain unclear. Therefore, in this study, we present new findings on its molecular mechanisms through single-cell RNA sequencing. Methods Induced pluripotent stem cells (iPSCs) from the patients with DS and the normal control (NC) patients were differentiated into iPSCs-derived neural stem cells (NSCs). Single-cell RNA sequencing was performed to achieve a comprehensive single-cell level differentiation roadmap for DS-iPSCs. Biological experiments were also performed to validate the findings. Results and Discussion The results demonstrated that iPSCs can differentiate into NSCs in both DS and NC samples. Furthermore, 19,422 cells were obtained from iPSC samples (8,500 cells for DS and 10,922 cells for the NC) and 16,506 cells from NSC samples (7,182 cells for DS and 9,324 cells for the NC), which had differentiated from the iPSCs. A cluster of DS-iPSCs, named DS-iPSCs-not differentiated (DSi-PSCs-ND), which had abnormal expression patterns compared with NC-iPSCs, were demonstrated to be unable to differentiate into DS-NSCs. Further analysis of the differentially expressed genes revealed that inhibitor of differentiation family (ID family) members, which exhibited abnormal expression patterns throughout the differentiation process from DS-iPSCs to DS-NSCs, may potentially have contributed to the neural differentiation of DS-iPSCs. Moreover, abnormal differentiation fate was observed in DS-NSCs, which resulted in the increased differentiation of glial cells, such as astrocytes, but decreased differentiation into neuronal cells. Furthermore, functional analysis demonstrated that DS-NSCs and DS-NPCs had disorders in axon and visual system development. The present study provided a new insight into the pathogenesis of DS.
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Affiliation(s)
- Jia-jun Qiu
- Shanghai Children’s Hospital, Shanghai Institute of Medical Genetics, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yan-na Liu
- Shanghai Children’s Hospital, Shanghai Institute of Medical Genetics, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hao Wei
- Shanghai Children’s Hospital, Shanghai Institute of Medical Genetics, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Fanyi Zeng
- Shanghai Children’s Hospital, Shanghai Institute of Medical Genetics, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Department of Hiso-Embryology, Genetics and Developmental Biology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- NHC Key Laboratory of Medical Embryogenesis and Developmental Molecular Biology and Shanghai Key Laboratory of Embryo and Reproduction Engineering, Shanghai, China
| | - Jing-bin Yan
- Shanghai Children’s Hospital, Shanghai Institute of Medical Genetics, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- NHC Key Laboratory of Medical Embryogenesis and Developmental Molecular Biology and Shanghai Key Laboratory of Embryo and Reproduction Engineering, Shanghai, China
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2
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Rodríguez-Arrizabalaga M, Hernández-Núñez I, Candal E, Barreiro-Iglesias A. Use of vivo-morpholinos for gene knockdown in the postnatal shark retina. Exp Eye Res 2023; 226:109333. [PMID: 36436570 DOI: 10.1016/j.exer.2022.109333] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 10/20/2022] [Accepted: 11/15/2022] [Indexed: 11/26/2022]
Abstract
Work in the catshark Scyliorhinus canicula has shown that the evolutionary origin of postnatal neurogenesis in vertebrates is earlier than previously thought. Thus, the catshark can serve as a model of interest to understand postnatal neurogenic processes and their evolution in vertebrates. One of the best characterized neurogenic niches of the catshark CNS is found in the peripheral region of the retina. Unfortunately, the lack of genetic tools in sharks limits the possibilities to deepen in the study of genes involved in the neurogenic process. Here, we report a method for gene knockdown in the juvenile catshark retina based on the use of Vivo-Morpholinos. To establish the method, we designed Vivo-Morpholinos against the proliferation marker PCNA. We first evaluated the possible toxicity of 3 different intraocular administration regimes. After this optimization step, we show that a single intraocular injection of the PCNA Vivo-Morpholino decreases the expression of PCNA in the peripheral retina, which leads to reduced mitotic activity in this region. This method will help in deciphering the role of other genes potentially involved in postnatal neurogenesis in this animal model.
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Affiliation(s)
- Mariña Rodríguez-Arrizabalaga
- Departament of Functional Biology, CIBUS, Faculty of Biology, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Ismael Hernández-Núñez
- Departament of Functional Biology, CIBUS, Faculty of Biology, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Eva Candal
- Departament of Functional Biology, CIBUS, Faculty of Biology, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Antón Barreiro-Iglesias
- Departament of Functional Biology, CIBUS, Faculty of Biology, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain.
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3
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Hernández-Núñez I, Vivero-Lopez M, Quelle-Regaldie A, DeGrip WJ, Sánchez L, Concheiro A, Alvarez-Lorenzo C, Candal E, Barreiro-Iglesias A. Embryonic nutritional hyperglycemia decreases cell proliferation in the zebrafish retina. Histochem Cell Biol 2022; 158:401-409. [PMID: 35779079 DOI: 10.1007/s00418-022-02127-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/10/2022] [Indexed: 12/27/2022]
Abstract
Diabetic retinopathy (DR) is one of the leading causes of blindness in the world. While there is a major focus on the study of juvenile/adult DR, the effects of hyperglycemia during early retinal development are less well studied. Recent studies in embryonic zebrafish models of nutritional hyperglycemia (high-glucose exposure) have revealed that hyperglycemia leads to decreased cell numbers of mature retinal cell types, which has been related to a modest increase in apoptotic cell death and altered cell differentiation. However, how embryonic hyperglycemia impacts cell proliferation in developing retinas still remains unknown. Here, we exposed zebrafish embryos to 50 mM glucose from 10 h postfertilization (hpf) to 5 days postfertilization (dpf). First, we confirmed that hyperglycemia increases apoptotic death and decreases the rod and Müller glia population in the retina of 5-dpf zebrafish. Interestingly, the increase in cell death was mainly observed in the ciliary marginal zone (CMZ), where most of the proliferating cells are located. To analyze the impact of hyperglycemia in cell proliferation, mitotic activity was first quantified using pH3 immunolabeling, which revealed a significant decrease in mitotic cells in the retina (mainly in the CMZ) at 5 dpf. A significant decrease in cell proliferation in the outer nuclear and ganglion cell layers of the central retina in hyperglycemic animals was also detected using the proliferation marker PCNA. Overall, our results show that nutritional hyperglycemia decreases cellular proliferation in the developing retina, which could significantly contribute to the decline in the number of mature retinal cells.
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Affiliation(s)
- Ismael Hernández-Núñez
- Department of Functional Biology, CIBUS, Faculty of Biology, Universidade de Santiago de Compostela, 15782, Santiago, Spain
| | - Maria Vivero-Lopez
- Departamento de Farmacología, Farmacia y Tecnología Farmacéutica, I+D Farma (GI-1645), Facultad de Farmacia, iMATUS and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, 15782, Santiago, Spain
| | - Ana Quelle-Regaldie
- Department of Zoology, Genetics and Physical Anthropology, Veterinary Faculty, Universidade de Santiago de Compostela, 27002, Lugo, Spain
| | - Willem J DeGrip
- Department of Biophysical Organic Chemistry, Leiden Institute of Chemistry, Leiden University, 2333 CC, Leiden, The Netherlands.,Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6500 HB, Nijmegen, The Netherlands
| | - Laura Sánchez
- Department of Zoology, Genetics and Physical Anthropology, Veterinary Faculty, Universidade de Santiago de Compostela, 27002, Lugo, Spain.,Preclinical Animal Models Group, Health Research Institute of Santiago de Compostela (IDIS), 15706, Santiago, Spain
| | - Angel Concheiro
- Departamento de Farmacología, Farmacia y Tecnología Farmacéutica, I+D Farma (GI-1645), Facultad de Farmacia, iMATUS and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, 15782, Santiago, Spain
| | - Carmen Alvarez-Lorenzo
- Departamento de Farmacología, Farmacia y Tecnología Farmacéutica, I+D Farma (GI-1645), Facultad de Farmacia, iMATUS and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, 15782, Santiago, Spain
| | - Eva Candal
- Department of Functional Biology, CIBUS, Faculty of Biology, Universidade de Santiago de Compostela, 15782, Santiago, Spain
| | - Antón Barreiro-Iglesias
- Department of Functional Biology, CIBUS, Faculty of Biology, Universidade de Santiago de Compostela, 15782, Santiago, Spain.
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4
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Álvarez-Hernán G, de Mera-Rodríguez JA, de la Gándara F, Ortega A, Barros-Gata I, Romero-Rodríguez JA, Blasco M, Martín-Partido G, Rodríguez-León J, Francisco-Morcillo J. Histogenesis and cell differentiation in the retina of Thunnus thynnus: A morphological and immunohistochemical study. Tissue Cell 2022; 76:101809. [DOI: 10.1016/j.tice.2022.101809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 04/24/2022] [Accepted: 04/24/2022] [Indexed: 10/18/2022]
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DeOliveira-Mello L, Vicente I, Gonzalez-Nunez V, Santos-Ledo A, Velasco A, Arévalo R, Lara JM, Mack AF. Doublecortin in the Fish Visual System, a Specific Protein of Maturing Neurons. BIOLOGY 2022; 11:biology11020248. [PMID: 35205114 PMCID: PMC8869232 DOI: 10.3390/biology11020248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Revised: 01/31/2022] [Accepted: 02/04/2022] [Indexed: 11/30/2022]
Abstract
Simple Summary Doublecortin (DCX) is an essential protein in the development of the central nervous system and in lamination of the mammalian cortex. It is known that the expression of DCX is restricted to newborn neurons. The visual system of teleost fish has been postulated as an ideal model since it continuously grows throughout the animal’s life. Here, we report a comparative expression analysis of DCX between two teleost fish species as well as a bioinformatic analysis with other animal groups. Our results demonstrate that DCX is very useful for identifying new neurons in the visual systems of Astatotilapia burtoni, but is absent in Danio rerio. Abstract Doublecortin (DCX) is a microtubule associated protein, essential for correct central nervous system development and lamination in the mammalian cortex. It has been demonstrated to be expressed in developing—but not in mature—neurons. The teleost visual system is an ideal model to study mechanisms of adult neurogenesis due to its continuous life-long growth. Here, we report immunohistochemical, in silico, and western blot analysis to detect the DCX protein in the visual system of teleost fish. We clearly determined the expression of DCX in newly generated cells in the retina of the cichlid fish Astatotilapia burtoni, but not in the cyprinid fish Danio rerio. Here, we show that DCX is not associated with migrating cells but could be related to axonal growth. This work brings to light the high conservation of DCX sequences between different evolutionary groups, which make it an ideal marker for maturing neurons in various species. The results from different techniques corroborate the absence of DCX expression in zebrafish. In A. burtoni, DCX is very useful for identifying new neurons in the transition zone of the retina. In addition, this marker can be applied to follow axons from maturing neurons through the neural fiber layer, optic nerve head, and optic nerve.
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Affiliation(s)
- Laura DeOliveira-Mello
- Institute of Neurosciences of Castilla and León, University of Salamanca, 37007 Salamanca, Spain; (V.G.-N.); (A.S.-L.); (A.V.); (R.A.); (J.M.L.)
- Institute for Biomedical Research of Salamanca (IBSAL), University of Salamanca, 37007 Salamanca, Spain
- Correspondence:
| | - Isabel Vicente
- Department of Agriculture, Food and Environment, University of Pisa, 56124 Pisa, Italy;
| | - Veronica Gonzalez-Nunez
- Institute of Neurosciences of Castilla and León, University of Salamanca, 37007 Salamanca, Spain; (V.G.-N.); (A.S.-L.); (A.V.); (R.A.); (J.M.L.)
- Institute for Biomedical Research of Salamanca (IBSAL), University of Salamanca, 37007 Salamanca, Spain
| | - Adrian Santos-Ledo
- Institute of Neurosciences of Castilla and León, University of Salamanca, 37007 Salamanca, Spain; (V.G.-N.); (A.S.-L.); (A.V.); (R.A.); (J.M.L.)
- Institute for Biomedical Research of Salamanca (IBSAL), University of Salamanca, 37007 Salamanca, Spain
| | - Almudena Velasco
- Institute of Neurosciences of Castilla and León, University of Salamanca, 37007 Salamanca, Spain; (V.G.-N.); (A.S.-L.); (A.V.); (R.A.); (J.M.L.)
- Institute for Biomedical Research of Salamanca (IBSAL), University of Salamanca, 37007 Salamanca, Spain
| | - Rosario Arévalo
- Institute of Neurosciences of Castilla and León, University of Salamanca, 37007 Salamanca, Spain; (V.G.-N.); (A.S.-L.); (A.V.); (R.A.); (J.M.L.)
- Institute for Biomedical Research of Salamanca (IBSAL), University of Salamanca, 37007 Salamanca, Spain
| | - Juan M. Lara
- Institute of Neurosciences of Castilla and León, University of Salamanca, 37007 Salamanca, Spain; (V.G.-N.); (A.S.-L.); (A.V.); (R.A.); (J.M.L.)
- Institute for Biomedical Research of Salamanca (IBSAL), University of Salamanca, 37007 Salamanca, Spain
| | - Andreas F. Mack
- Institute of Clinical Anatomy and Cell Analysis, Eberhard-Karls Universität Tübingen, 72074 Tübingen, Germany;
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Decline in Constitutive Proliferative Activity in the Zebrafish Retina with Ageing. Int J Mol Sci 2021; 22:ijms222111715. [PMID: 34769146 PMCID: PMC8583983 DOI: 10.3390/ijms222111715] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 10/19/2021] [Accepted: 10/25/2021] [Indexed: 01/15/2023] Open
Abstract
It is largely assumed that the teleost retina shows continuous and active proliferative and neurogenic activity throughout life. However, when delving into the teleost literature, one finds that assumptions about a highly active and continuous proliferation in the adult retina are based on studies in which proliferation was not quantified in a comparative way at the different life stages or was mainly studied in juveniles/young adults. Here, we performed a systematic and comparative study of the constitutive proliferative activity of the retina from early developing (2 days post-fertilisation) to aged (up to 3–4 years post-fertilisation) zebrafish. The mitotic activity and cell cycle progression were analysed by using immunofluorescence against pH3 and PCNA, respectively. We observed a decline in the cell proliferation in the retina with ageing despite the occurrence of a wave of secondary proliferation during sexual maturation. During this wave of secondary proliferation, the distribution of proliferating and mitotic cells changes from the inner to the outer nuclear layer in the central retina. Importantly, in aged zebrafish, there is a virtual disappearance of mitotic activity. Our results showing a decline in the proliferative activity of the zebrafish retina with ageing are of crucial importance since it is generally assumed that the fish retina has continuous proliferative activity throughout life.
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7
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Rodríguez-Moldes I, Quintana-Urzainqui I, Santos-Durán GN, Ferreiro-Galve S, Pereira-Guldrís S, Candás M, Mazan S, Candal E. Identifying Amygdala-Like Territories in Scyliorhinus canicula (Chondrichthyan): Evidence for a Pallial Amygdala. BRAIN, BEHAVIOR AND EVOLUTION 2021; 96:283-304. [PMID: 34662880 DOI: 10.1159/000519221] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 08/24/2021] [Indexed: 12/16/2022]
Abstract
To identify the putative amygdalar complex in cartilaginous fishes, our first step was to obtain evidence that supports the existence of a pallial amygdala in the catshark Scyliorhinus canicula, at present the prevailing chondrichthyan model in comparative neurobiology and developmental biology. To this end, we analyzed the organization of the lateral walls of the telencephalic hemispheres of adults, juveniles, and early prehatching embryos by immunohistochemistry against tyrosine hydroxylase (TH), somatostatin (SOM), Pax6, serotonin (5HT), substance P (SP), and Met-enkephalin (MetEnk), calbindin-28k (CB), and calretinin (CR), and by in situ hybridization against regulatory genes such as Tbr1, Lhx9, Emx1, and Dlx2. Our data were integrated with those available from the literature related to the secondary olfactory projections in this shark species. We have characterized two possible amygdalar territories. One, which may represent a ventropallial component, was identified by its chemical signature (moderate density of Pax6-ir cells, scarce TH-ir and SOM-ir cells, and absence of CR-ir and CB-ir cells) and gene expressions (Tbr1 and Lhx9 expressions in an Emx1 negative domain, as the ventral pallium of amniotes). It is perhaps comparable to the lateral amygdala of amphibians and the pallial amygdala of teleosts. The second was a territory related to the pallial-subpallial boundary with abundant Pax6-ir and CR-ir cells, and 5HT-ir, SP-ir, and MetEnk-ir fibers capping dorsally the area superficialis basalis. This olfactory-related region at the neighborhood of the pallial-subpallial boundary may represent a subpallial amygdala subdivision that possibly contains migrated cells of ventropallial origin.
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Affiliation(s)
- Isabel Rodríguez-Moldes
- Grupo Neurodevo,Departamento de Bioloxía Funcional, Centro de Investigación en Bioloxía (CIBUS), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Idoia Quintana-Urzainqui
- Grupo Neurodevo,Departamento de Bioloxía Funcional, Centro de Investigación en Bioloxía (CIBUS), Universidade de Santiago de Compostela, Santiago de Compostela, Spain.,Developmental Biology Unit, European Molecular Biology Laboratory (EMBL), Heidelberg, Germany
| | - Gabriel Nicolás Santos-Durán
- Grupo Neurodevo,Departamento de Bioloxía Funcional, Centro de Investigación en Bioloxía (CIBUS), Universidade de Santiago de Compostela, Santiago de Compostela, Spain.,Laboratory of Artificial and Natural Evolution (LANE), Department of Genetics and Evolution, University of Geneva, Geneva, Switzerland
| | - Susana Ferreiro-Galve
- Grupo Neurodevo,Departamento de Bioloxía Funcional, Centro de Investigación en Bioloxía (CIBUS), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Santiago Pereira-Guldrís
- Grupo Neurodevo,Departamento de Bioloxía Funcional, Centro de Investigación en Bioloxía (CIBUS), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - María Candás
- REBUSC-Marine Biology Station of A Graña, University of Santiago de Compostela, Santiago de Compostela, Spain
| | - Sylvie Mazan
- CNRS, Sorbonne Universités, UPMC Univ Paris 06, UMR7232, Observatoire Océanologique, Banyuls, France
| | - Eva Candal
- Grupo Neurodevo,Departamento de Bioloxía Funcional, Centro de Investigación en Bioloxía (CIBUS), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
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Ma X, Cheng O, Jiang Q, Yang J, Xiao H, Qiu H. Activation of ephrinb1/EPHB2/MAP-2/NMDAR Mediates Hippocampal Neurogenesis Promoted by Transcranial Direct Current Stimulation in Cerebral-Ischemic Mice. Neuromolecular Med 2021; 23:521-530. [PMID: 33782855 DOI: 10.1007/s12017-021-08654-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Accepted: 03/16/2021] [Indexed: 11/28/2022]
Abstract
tDCS, a new, safe, non-invasive physical therapy method, is often used in motor dysfunction rehabilitation. However, the effects and underlying mechanisms of tDCS on hippocampal neurogenesis after cerebral ischemia (CI) are still unclear. This study aimed to investigate the promotive effect and mechanism of repetitive anodal-tDCS on hippocampal neurogenesis after CI in mice. The CI model in mice was established using bilateral common carotid artery occlusion (BCCAO). The pathological changes in the hippocampal CA1 region and cognitive function were assessed by hematoxylin and eosin staining and Morris water maze test, respectively. Hippocampal neurogenesis was observed by immunofluorescence staining. The levels of expression of ephrinb1, EPHB2, MAP-2, and NMDAR in the hippocampi were analyzed by qRT-PCR and Western blotting. Compared with the sham mice, the model mice showed significant neuronal damage in the hippocampal CA1 region (P < 0.01), cognitive dysfunction (P < 0.01), and endogenous hippocampal neurogenesis (P < 0.01). These results suggested that the CI model was successfully established, and that CI could promote endogenous hippocampal neurogenesis, but this hippocampal neurogenesis was unable to recover cognitive dysfunction. Compared with the model mice, the tDCS mice had ameliorated pathological damage in the CA1 region (P < 0.01), improved cognitive function (P < 0.01), increased hippocampal neurogenesis (P < 0.01), and increased mRNA and protein expression of ephrinb1, EPHB2, MAP-2, and NMDAR (P < 0.05). Repetitive anodal-tDCS can promote hippocampal neurogenesis and improve cognitive function in CI mice. The effect may be related to the activation of the ephrinb1/EPHB2/MAP-2/NMDAR signaling pathway.
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Affiliation(s)
- Xiaojiao Ma
- Department of Pharmacology, College of Pharmacy, Chongqing Key Lab of Biochemistry and Molecular Pharmacology, Chongqing Key Lab Drug Metabolism, Chongqing Medical University, No. 1 Yixueyuan Road, Chongqing, 400016, China
| | - Oumei Cheng
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Qingsong Jiang
- Department of Pharmacology, College of Pharmacy, Chongqing Key Lab of Biochemistry and Molecular Pharmacology, Chongqing Key Lab Drug Metabolism, Chongqing Medical University, No. 1 Yixueyuan Road, Chongqing, 400016, China
| | - Junxia Yang
- Department of Pharmacology, College of Pharmacy, Chongqing Key Lab of Biochemistry and Molecular Pharmacology, Chongqing Key Lab Drug Metabolism, Chongqing Medical University, No. 1 Yixueyuan Road, Chongqing, 400016, China
| | - Huan Xiao
- Department of Pharmacology, College of Pharmacy, Chongqing Key Lab of Biochemistry and Molecular Pharmacology, Chongqing Key Lab Drug Metabolism, Chongqing Medical University, No. 1 Yixueyuan Road, Chongqing, 400016, China
| | - Hongmei Qiu
- Department of Pharmacology, College of Pharmacy, Chongqing Key Lab of Biochemistry and Molecular Pharmacology, Chongqing Key Lab Drug Metabolism, Chongqing Medical University, No. 1 Yixueyuan Road, Chongqing, 400016, China.
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9
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Hernández-Núñez I, Robledo D, Mayeur H, Mazan S, Sánchez L, Adrio F, Barreiro-Iglesias A, Candal E. Loss of Active Neurogenesis in the Adult Shark Retina. Front Cell Dev Biol 2021; 9:628721. [PMID: 33644067 PMCID: PMC7905061 DOI: 10.3389/fcell.2021.628721] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 01/12/2021] [Indexed: 01/09/2023] Open
Abstract
Neurogenesis is the process by which progenitor cells generate new neurons. As development progresses neurogenesis becomes restricted to discrete neurogenic niches, where it persists during postnatal life. The retina of teleost fishes is thought to proliferate and produce new cells throughout life. Whether this capacity may be an ancestral characteristic of gnathostome vertebrates is completely unknown. Cartilaginous fishes occupy a key phylogenetic position to infer ancestral states fixed prior to the gnathostome radiation. Previous work from our group revealed that the juvenile retina of the catshark Scyliorhinus canicula, a cartilaginous fish, shows active proliferation and neurogenesis. Here, we compared the morphology and proliferative status of the retina in catshark juveniles and adults. Histological and immunohistochemical analyses revealed an important reduction in the size of the peripheral retina (where progenitor cells are mainly located), a decrease in the thickness of the inner nuclear layer (INL), an increase in the thickness of the inner plexiform layer and a decrease in the cell density in the INL and in the ganglion cell layer in adults. Contrary to what has been reported in teleost fish, mitotic activity in the catshark retina was virtually absent after sexual maturation. Based on these results, we carried out RNA-Sequencing (RNA-Seq) analyses comparing the retinal transcriptome of juveniles and adults, which revealed a statistically significant decrease in the expression of many genes involved in cell proliferation and neurogenesis in adult catsharks. Our RNA-Seq data provides an excellent resource to identify new signaling pathways controlling neurogenesis in the vertebrate retina.
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Affiliation(s)
- Ismael Hernández-Núñez
- Departamento de Bioloxía Funcional, Facultade de Bioloxía, CIBUS, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Diego Robledo
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, United Kingdom
| | - Hélène Mayeur
- CNRS, Sorbonne Universités, UPMC Univ Paris 06, UMR7232, Observatoire Océanologique, Banyuls-sur-mer, France
| | - Sylvie Mazan
- CNRS, Sorbonne Universités, UPMC Univ Paris 06, UMR7232, Observatoire Océanologique, Banyuls-sur-mer, France
| | - Laura Sánchez
- Departamento de Zooloxía, Xenética e Antropoloxía Física, Facultade de Veterinaria, Universidade de Santiago de Compostela, Lugo, Spain
| | - Fátima Adrio
- Departamento de Bioloxía Funcional, Facultade de Bioloxía, CIBUS, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Antón Barreiro-Iglesias
- Departamento de Bioloxía Funcional, Facultade de Bioloxía, CIBUS, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Eva Candal
- Departamento de Bioloxía Funcional, Facultade de Bioloxía, CIBUS, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
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10
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Álvarez-Hernán G, de Mera-Rodríguez JA, Gañán Y, Solana-Fajardo J, Martín-Partido G, Rodríguez-León J, Francisco-Morcillo J. Development and postnatal neurogenesis in the retina: a comparison between altricial and precocial bird species. Neural Regen Res 2021; 16:16-20. [PMID: 32788442 PMCID: PMC7818864 DOI: 10.4103/1673-5374.286947] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 03/14/2020] [Accepted: 04/07/2020] [Indexed: 01/09/2023] Open
Abstract
The visual system is affected by neurodegenerative diseases caused by the degeneration of specific retinal neurons, the leading cause of irreversible blindness in humans. Throughout vertebrate phylogeny, the retina has two kinds of specialized niches of constitutive neurogenesis: the retinal progenitors located in the circumferential marginal zone and Müller glia. The proliferative activity in the retinal progenitors located in the circumferential marginal zone in precocial birds such as the chicken, the commonest bird model used in developmental and regenerative studies, is very low. This region adds only a few retinal cells to the peripheral edge of the retina during several months after hatching, but does not seem to be involved in retinal regeneration. Müller cells in the chicken retina are not proliferative under physiological conditions, but after acute damage some of them undergo a reprogramming event, dedifferentiating into retinal stem cells and generating new retinal neurons. Therefore, regenerative response after injury occurs with low efficiency in the precocial avian retina. In contrast, it has recently been shown that neurogenesis is intense in the retina of altricial birds at hatching. In particular, abundant proliferative activity is detected both in the circumferential marginal zone and in the outer half of the inner nuclear layer. Therefore, stem cell niches are very active in the retina of altricial birds. Although more extensive research is needed to assess the potential of proliferating cells in the adult retina of altricial birds, it emerges as an attractive model for studying different aspects of neurogenesis and neural regeneration in vertebrates.
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Affiliation(s)
- Guadalupe Álvarez-Hernán
- Área de Biología Celular, Departamento de Anatomía, Biología Celular y Zoología, Facultad de Ciencias, Universidad de Extremadura, Badajoz, Spain
| | - José Antonio de Mera-Rodríguez
- Área de Anatomía Humana, Departamento de Anatomía, Biología Celular y Zoología, Facultad de Medicina, Universidad de Extremadura, Badajoz, Spain
| | - Yolanda Gañán
- Área de Anatomía Humana, Departamento de Anatomía, Biología Celular y Zoología, Facultad de Medicina, Universidad de Extremadura, Badajoz, Spain
| | - Jorge Solana-Fajardo
- Servicio de Oftalmología, Complejo Hospitalario Universitario de Badajoz, Badajoz, Spain
| | - Gervasio Martín-Partido
- Área de Biología Celular, Departamento de Anatomía, Biología Celular y Zoología, Facultad de Ciencias, Universidad de Extremadura, Badajoz, Spain
| | - Joaquín Rodríguez-León
- Área de Anatomía Humana, Departamento de Anatomía, Biología Celular y Zoología, Facultad de Medicina, Universidad de Extremadura, Badajoz, Spain
| | - Javier Francisco-Morcillo
- Área de Biología Celular, Departamento de Anatomía, Biología Celular y Zoología, Facultad de Ciencias, Universidad de Extremadura, Badajoz, Spain
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11
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Yang X, Song D, Chen L, Xiao H, Ma X, Jiang Q, Cheng O. Curcumin promotes neurogenesis of hippocampal dentate gyrus via Wnt/β-catenin signal pathway following cerebral ischemia in mice. Brain Res 2020; 1751:147197. [PMID: 33160958 DOI: 10.1016/j.brainres.2020.147197] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 10/31/2020] [Accepted: 10/31/2020] [Indexed: 02/08/2023]
Abstract
OBJECTIVES To investigate whether curcumin promotes hippocampal neurogenesis in the cerebral ischemia (CI) mice via Wnt/β-catenin signaling pathway. METHODS Male C57BL/6 mice were randomly divided into groups: sham operation group (Sham), cerebral ischemic group (CI), curcumin treatment group (50, 100 mg/kg/d, i.p.) and curcumin (100 mg/kg/d) + DKK1 (a blocker of Wnt receptor, 200 ng/d, icv) group. CI was induced by bilateral common carotid arteries occlusion (BCCAO) for 20 min. The Morris water maze test was conducted to detect spatial learning and memory. Immunofluorescence staining was used to examine the proliferation and differentiation of immature neurons in the hippocampal dentate gyrus. The proteins involved in neurogenesis and Wnt signaling pathway were examined using Western blot assay. RESULTS Curcumin significantly alleviated cognitive deficits induced by CI. Curcumin dose-dependently increased the proliferation of neural stem cells and promoted the differentiation and maturation of newly generated neural cells into neurons. Curcumin also increased the expression of proteins involved in neurogenesis (including Ngn2, Pax6 and NeuroD 1) and the Wnt/β-catenin signaling pathway. Moreover, the forenamed effects of curcumin were abolished by pretreatment with DKK1, a blocker of Wnt receptor. CONCLUSION Curcumin promotes hippocampal neurogenesis by activating Wnt/β-catenin signaling pathway to ameliorate cognitive deficits after acute CI.
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Affiliation(s)
- Xuemei Yang
- Department of Pharmacy, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China; The Key Laboratory of Biochemistry and Molecular Pharmacology, Department of Pharmacology, Chongqing Medical University, Chongqing, China
| | - Dan Song
- Department of Neurology, The First Affiliated Hospital, Chongqing Medical University, Chongqing, China; Laboratory Research Center, The First Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Lili Chen
- Department of Neurology, The First Affiliated Hospital, Chongqing Medical University, Chongqing, China; Laboratory Research Center, The First Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Huan Xiao
- The Key Laboratory of Biochemistry and Molecular Pharmacology, Department of Pharmacology, Chongqing Medical University, Chongqing, China
| | - Xiaojiao Ma
- The Key Laboratory of Biochemistry and Molecular Pharmacology, Department of Pharmacology, Chongqing Medical University, Chongqing, China
| | - Qingsong Jiang
- The Key Laboratory of Biochemistry and Molecular Pharmacology, Department of Pharmacology, Chongqing Medical University, Chongqing, China.
| | - Oumei Cheng
- Department of Neurology, The First Affiliated Hospital, Chongqing Medical University, Chongqing, China.
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12
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Docampo-Seara A, Pereira-Guldrís S, Sánchez-Farías N, Mazan S, Rodríguez MA, Candal E. Characterization of neurogenic niches in the telencephalon of juvenile and adult sharks. Brain Struct Funct 2020; 225:817-839. [PMID: 32062722 PMCID: PMC7046584 DOI: 10.1007/s00429-020-02038-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Accepted: 01/29/2020] [Indexed: 12/21/2022]
Abstract
Neurogenesis is a multistep process by which progenitor cells become terminally differentiated neurons. Adult neurogenesis has gathered increasing interest with the aim of developing new cell-based treatments for neurodegenerative diseases in humans. Active sites of adult neurogenesis exist from fish to mammals, although in the adult mammalian brain the number and extension of neurogenic areas is considerably reduced in comparison to non-mammalian vertebrates and they become mostly reduced to the telencephalon. Much of our understanding in this field is based in studies on mammals and zebrafish, a modern bony fish. The use of the cartilaginous fish Scyliorhinus canicula (representative of basal gnathostomes) as a model expands the comparative framework to a species that shows highly neurogenic activity in the adult brain. In this work, we studied the proliferation pattern in the telencephalon of juvenile and adult specimens of S. canicula using antibodies against the proliferation marker proliferating cell nuclear antigen (PCNA). We have characterized proliferating niches using stem cell markers (Sex determining region Y-box 2), glial markers (glial fibrillary acidic protein, brain lipid binding protein and glutamine synthase), intermediate progenitor cell markers (Dlx2 and Tbr2) and markers for migrating neuroblasts (Doublecortin). Based in the expression pattern of these markers, we demonstrate the existence of different cell subtypes within the PCNA immunoreactive zones including non-glial stem cells, glial progenitors, intermediate progenitor-like cells and migratory neuroblasts, which were widely distributed in the ventricular zone of the pallium, suggesting that the main progenitor types that constitute the neurogenic niche in mammals are already present in cartilaginous fishes.
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Affiliation(s)
- A Docampo-Seara
- Departamento de Bioloxía Funcional, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - S Pereira-Guldrís
- Departamento de Bioloxía Funcional, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - N Sánchez-Farías
- Departamento de Bioloxía Funcional, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - S Mazan
- CNRS, Sorbonne Universités, UPMC Univ Paris 06, UMR7232, Observatoire Océanologique, Banyuls, France
| | - M A Rodríguez
- Departamento de Bioloxía Funcional, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Eva Candal
- Departamento de Bioloxía Funcional, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain.
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13
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Retinal differentiation in syngnathids: comparison in the developmental rate and acquisition of retinal structures in altricial and precocial fish species. ZOOMORPHOLOGY 2019. [DOI: 10.1007/s00435-019-00447-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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14
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Grigoryan EN. Endogenous Cell Sources for Eye Retina Regeneration in Vertebrate Animals and Humans. Russ J Dev Biol 2019. [DOI: 10.1134/s106236041901003x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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15
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Grigoryan EN. Molecular Factors of the Maintenance and Activation of the Juvenile Phenotype of Cellular Sources for Eye Tissue Regeneration. BIOCHEMISTRY (MOSCOW) 2018; 83:1318-1331. [DOI: 10.1134/s0006297918110032] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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16
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Docampo-Seara A, Santos-Durán GN, Candal E, Rodríguez Díaz MÁ. Expression of radial glial markers (GFAP, BLBP and GS) during telencephalic development in the catshark (Scyliorhinus canicula). Brain Struct Funct 2018; 224:33-56. [PMID: 30242506 PMCID: PMC6373381 DOI: 10.1007/s00429-018-1758-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 09/14/2018] [Indexed: 01/04/2023]
Abstract
Radial glial cells (RGCs) are the first cell populations of glial nature to appear during brain ontogeny. They act as primary progenitor (stem) cells as well as a scaffold for neuronal migration. The proliferative capacity of these cells, both in development and in adulthood, has been subject of interest during past decades. In contrast with mammals where RGCs are restricted to specific ventricular areas in the adult brain, RGCs are the predominant glial element in fishes. However, developmental studies on the RGCs of cartilaginous fishes are scant. We have studied the expression patterns of RGCs markers including glial fibrillary acidic protein (GFAP), brain lipid binding protein (BLBP), and glutamine synthase (GS) in the telencephalic hemispheres of catshark (Scyliorhinus canicula) from early embryos to post-hatch juveniles. GFAP, BLBP and GS are first detected, respectively, in early, intermediate and late embryos. Expression of these glial markers was observed in cells with radial glia morphology lining the telencephalic ventricles, as well as in their radial processes and endfeet at the pial surface and their expression continue in ependymal cells (or tanycytes) in early juveniles. In addition, BLBP- and GS-immunoreactive cells morphologically resembling oligodendrocytes were observed. In late embryos, most of the GFAP- and BLBP-positive RGCs also coexpress GS and show proliferative activity. Our results indicate the existence of different proliferating subpopulations of RGCs in the embryonic ventricular zone of catshark. Further investigations are needed to determine whether these proliferative RGCs could act as neurogenic and/or gliogenic precursors.
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Affiliation(s)
- A Docampo-Seara
- Departamento de Bioloxía Funcional, Centro de Investigación en Bioloxía (CIBUS), Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - G N Santos-Durán
- Laboratory of Artificial and Natural Evolution (LANE), Department of Genetics and Evolution, University of Geneva, Geneva, Switzerland
| | - E Candal
- Departamento de Bioloxía Funcional, Centro de Investigación en Bioloxía (CIBUS), Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Miguel Ángel Rodríguez Díaz
- Departamento de Bioloxía Funcional, Centro de Investigación en Bioloxía (CIBUS), Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain.
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17
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Study of pallial neurogenesis in shark embryos and the evolutionary origin of the subventricular zone. Brain Struct Funct 2018; 223:3593-3612. [PMID: 29980930 DOI: 10.1007/s00429-018-1705-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 06/19/2018] [Indexed: 12/13/2022]
Abstract
The dorsal part of the developing telencephalon is one of the brain areas that has suffered most drastic changes throughout vertebrate evolution. Its evolutionary increase in complexity was thought to be partly achieved by the appearance of a new neurogenic niche in the embryonic subventricular zone (SVZ). Here, a new kind of amplifying progenitors (basal progenitors) expressing Tbr2, undergo a second round of divisions, which is believed to have contributed to the expansion of the neocortex. Accordingly, the existence of a pallial SVZ has been classically considered exclusive of mammals. However, the lack of studies in ancient vertebrates precludes any clear conclusion about the evolutionary origin of the SVZ and the neurogenic mechanisms that rule pallial development. In this work, we explore pallial neurogenesis in a basal vertebrate, the shark Scyliorhinus canicula, through the study of the expression patterns of several neurogenic markers. We found that apical progenitors and radial migration are present in sharks, and therefore, their presence must be highly conserved throughout evolution. Surprisingly, we detected a subventricular band of ScTbr2-expressing cells, some of which also expressed mitotic markers, indicating that the existence of basal progenitors should be considered an ancestral condition rather than a novelty of mammals or amniotes. Finally, we report that the transcriptional program for the specification of glutamatergic pallial cells (Pax6, Tbr2, NeuroD, Tbr1) is also present in sharks. However, the segregation of these markers into different cell types is not clear yet, which may be linked to the lack of layering in anamniotes.
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18
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Smith CA, Chauhan BC. In vivo imaging of adeno-associated viral vector labelled retinal ganglion cells. Sci Rep 2018; 8:1490. [PMID: 29367685 PMCID: PMC5784170 DOI: 10.1038/s41598-018-19969-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Accepted: 01/11/2018] [Indexed: 01/10/2023] Open
Abstract
A defining characteristic of optic neuropathies, such as glaucoma, is progressive loss of retinal ganglion cells (RGCs). Current clinical tests only provide weak surrogates of RGC loss, but the possibility of optically visualizing RGCs and quantifying their rate of loss could represent a radical advance in the management of optic neuropathies. In this study we injected two different adeno-associated viral (AAV) vector serotypes in the vitreous to enable green fluorescent protein (GFP) labelling of RGCs in wild-type mice for in vivo and non-invasive imaging. GFP-labelled cells were detected by confocal scanning laser ophthalmoscopy 1-week post-injection and plateaued in density at 4 weeks. Immunohistochemical analysis 5-weeks post-injection revealed labelling specificity to RGCs to be significantly higher with the AAV2-DCX-GFP vector compared to the AAV2-CAG-GFP vector. There were no adverse functional or structural effects of the labelling method as determined with electroretinography and optical coherence tomography, respectively. The RGC-specific positive and negative scotopic threshold responses had similar amplitudes between control and experimental eyes, while inner retinal thickness was also unchanged after injection. As a positive control experiment, optic nerve transection resulted in a progressive loss of labelled RGCs. AAV vectors provide strong and long-lasting GFP labelling of RGCs without detectable adverse effects.
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Affiliation(s)
- Corey A Smith
- Department of Physiology and Biophysics, Dalhousie University, 5850 College Street, PO Box 15000, Halifax, Nova Scotia, B3H 4R2, Canada.,Retina and Optic Nerve Research Laboratory, Dalhousie University, 5850 College Street, PO Box 15000, Halifax, Nova Scotia, B3H 4R2, Canada
| | - Balwantray C Chauhan
- Department of Physiology and Biophysics, Dalhousie University, 5850 College Street, PO Box 15000, Halifax, Nova Scotia, B3H 4R2, Canada. .,Retina and Optic Nerve Research Laboratory, Dalhousie University, 5850 College Street, PO Box 15000, Halifax, Nova Scotia, B3H 4R2, Canada. .,Department of Ophthalmology and Visual Sciences, Dalhousie University, 1276 South Park Street, 2W Victoria, Halifax, Nova Scotia, B3H 2Y9, Canada.
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19
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Ayanlaja AA, Xiong Y, Gao Y, Ji G, Tang C, Abdikani Abdullah Z, Gao D. Distinct Features of Doublecortin as a Marker of Neuronal Migration and Its Implications in Cancer Cell Mobility. Front Mol Neurosci 2017; 10:199. [PMID: 28701917 PMCID: PMC5487455 DOI: 10.3389/fnmol.2017.00199] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 06/06/2017] [Indexed: 12/16/2022] Open
Abstract
Neuronal migration is a critical process in the development of the nervous system. Defects in the migration of the neurons are associated with diseases like lissencephaly, subcortical band heterotopia (SBH), and pachygyria. Doublecortin (DCX) is an essential factor in neurogenesis and mutations in this protein impairs neuronal migration leading to several pathological conditions. Although, DCX is capable of modulating and stabilizing microtubules (MTs) to ensure effective migration, the mechanisms involved in executing these functions remain poorly understood. Meanwhile, there are existing gaps regarding the processes that underlie tumor initiation and progression into cancer as well as the ability to migrate and invade normal cells. Several studies suggest that DCX is involved in cancer metastasis. Unstable interactions between DCX and MTs destabilizes cytoskeletal organization leading to disorganized movements of cells, a process which may be implicated in the uncontrolled migration of cancer cells. However, the underlying mechanism is complex and require further clarification. Therefore, exploring the importance and features known up to date about this molecule will broaden our understanding and shed light on potential therapeutic approaches for the associated neurological diseases. This review summarizes current knowledge about DCX, its features, functions, and relationships with other proteins. We also present an overview of its role in cancer cells and highlight the importance of studying its gene mutations.
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Affiliation(s)
- Abiola A Ayanlaja
- Xuzhou Key Laboratory of Neurobiology, Department of Neurobiology and Anatomy, Xuzhou Medical UniversityXuzhou, China
| | - Ye Xiong
- Xuzhou Key Laboratory of Neurobiology, Department of Neurobiology and Anatomy, Xuzhou Medical UniversityXuzhou, China
| | - Yue Gao
- Xuzhou Key Laboratory of Neurobiology, Department of Neurobiology and Anatomy, Xuzhou Medical UniversityXuzhou, China
| | - GuangQuan Ji
- Xuzhou Key Laboratory of Neurobiology, Department of Neurobiology and Anatomy, Xuzhou Medical UniversityXuzhou, China
| | - Chuanxi Tang
- Xuzhou Key Laboratory of Neurobiology, Department of Neurobiology and Anatomy, Xuzhou Medical UniversityXuzhou, China
| | - Zamzam Abdikani Abdullah
- Xuzhou Key Laboratory of Neurobiology, Department of Neurobiology and Anatomy, Xuzhou Medical UniversityXuzhou, China
| | - DianShuai Gao
- Xuzhou Key Laboratory of Neurobiology, Department of Neurobiology and Anatomy, Xuzhou Medical UniversityXuzhou, China
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20
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Huang WL, Ma YX, Fan YB, Lai SM, Liu HQ, Liu J, Luo L, Li GY, Tian SM. Extract of Ginkgo biloba promotes neuronal regeneration in the hippocampus after exposure to acrylamide. Neural Regen Res 2017; 12:1287-1293. [PMID: 28966643 PMCID: PMC5607823 DOI: 10.4103/1673-5374.213548] [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] [Indexed: 11/10/2022] Open
Abstract
Previous studies have demonstrated a neuroprotective effect of extract of Ginkgo biloba against neuronal damage, but have mainly focused on antioxidation of extract of Ginkgo biloba. To date, limited studies have determined whether extrasct of Ginkgo biloba has a protective effect on neuronal damage. In the present study, acrylamide and 30, 60, and 120 mg/kg extract of Ginkgo biloba were administered for 4 weeks by gavage to establish mouse models. Our results showed that 30, 60, and 120 mg/kg extract of Ginkgo biloba effectively alleviated the abnormal gait of poisoned mice, and up-regulated protein expression levels of doublecortin (DCX), brain-derived neurotrophic factor, and growth associated protein-43 (GAP-43) in the hippocampus. Simultaneously, DCX- and GAP-43-immunoreactive cells increased. These findings suggest that extract of Ginkgo biloba can mitigate neurotoxicity induced by acrylamide, and thereby promote neuronal regeneration in the hippocampus of acrylamide-treated mice.
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Affiliation(s)
- Wei-Ling Huang
- Department of Anatomy, School of Basic Medicine, Guangdong Pharmaceutical University, Guangzhou, Guangdong Province, China
| | - Yu-Xin Ma
- Department of Anatomy, School of Basic Medicine, Guangdong Pharmaceutical University, Guangzhou, Guangdong Province, China
| | - Yu-Bao Fan
- Department of Anatomy, School of Basic Medicine, Guangdong Pharmaceutical University, Guangzhou, Guangdong Province, China
| | - Sheng-Min Lai
- Department of Anatomy, School of Basic Medicine, Guangdong Pharmaceutical University, Guangzhou, Guangdong Province, China
| | - Hong-Qing Liu
- Department of Anatomy, School of Basic Medicine, Guangdong Pharmaceutical University, Guangzhou, Guangdong Province, China
| | - Jing Liu
- Department of Anatomy, School of Basic Medicine, Guangdong Pharmaceutical University, Guangzhou, Guangdong Province, China
| | - Li Luo
- Department of Anatomy, School of Basic Medicine, Guangdong Pharmaceutical University, Guangzhou, Guangdong Province, China
| | - Guo-Ying Li
- Department of Anatomy, School of Basic Medicine, Guangdong Pharmaceutical University, Guangzhou, Guangdong Province, China
| | - Su-Min Tian
- Department of Physiology, School of Basic Medicine, Guangdong Pharmaceutical University, Guangzhou, Guangdong Province, China
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Sánchez-Farías N, Candal E. Identification of Radial Glia Progenitors in the Developing and Adult Retina of Sharks. Front Neuroanat 2016; 10:65. [PMID: 27378863 PMCID: PMC4913098 DOI: 10.3389/fnana.2016.00065] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 06/01/2016] [Indexed: 01/01/2023] Open
Abstract
Neural stem cells give rise to transient progenitors termed neuroepithelial cells (NECs) and radial glial cells (RGCs). RGCs represent the major source of neurons, glia and adult stem cells in several regions of the central nervous system (CNS). RGCs are mostly transient in mammals, but they are widely maintained in the adult CNS of fishes, where they continue to be morphologically similar to RGCs in the mammalian brain and fulfill similar roles as progenitors and guide for migrating neurons. The retina of fishes offers an exceptional model to approach the study of adult neurogenesis because of the presence of constitutive proliferation from the ciliary marginal zone (CMZ), containing NECs, and from adult glial cells with radial morphology (the Müller glia). However, the cellular hierarchies and precise contribution of different types of progenitors to adult neurogenesis remain unsolved. We have analyzed the transition from NECs to RGCs and RGC differentiation in the retina of the cartilaginous fish Scyliorhinus canicula, which offers a particularly good spatial and temporal frame to investigate this process. We have characterized progenitor and adult RGCs by immunohistochemical detection of glial markers as glial fibrillary acidic protein (GFAP) and glutamine synthetase (GS). We have compared the emergence and localization of glial markers with that of proliferating cell nuclear antigen (PCNA, a proliferation maker) and Doublecortin (DCX, which increases at early stages of neuronal differentiation). During retinal development, GFAP-immunoreactive NECs located in the most peripheral CMZ (CMZp) codistribute with DCX-immunonegative cells. GFAP-immunoreactive RGCs and Müller cells are located in successive more central parts of the retina and codistribute with DCX- and DCX/GS-immunoreactive cells, respectively. The same types of progenitors are found in juveniles, suggesting that the contribution of the CMZ to adult neurogenesis implies a transition through the radial glia (RG) state.
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Affiliation(s)
- Nuria Sánchez-Farías
- Grupo BRAINSHARK, Departamento de Bioloxía Celular e Ecoloxía, Universidade de Santiago de Compostela Santiago de Compostela, Spain
| | - Eva Candal
- Grupo BRAINSHARK, Departamento de Bioloxía Celular e Ecoloxía, Universidade de Santiago de Compostela Santiago de Compostela, Spain
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Fernández-López B, Romaus-Sanjurjo D, Senra-Martínez P, Anadón R, Barreiro-Iglesias A, Rodicio MC. Spatiotemporal Pattern of Doublecortin Expression in the Retina of the Sea Lamprey. Front Neuroanat 2016; 10:5. [PMID: 26858609 PMCID: PMC4731500 DOI: 10.3389/fnana.2016.00005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Accepted: 01/12/2016] [Indexed: 12/30/2022] Open
Abstract
Despite the importance of doublecortin (DCX) for the development of the nervous system, its expression in the retina of most vertebrates is still unknown. The key phylogenetic position of lampreys, together with their complex life cycle, with a long blind larval stage and an active predator adult stage, makes them an interesting model to study retinal development. Here, we studied the spatiotemporal pattern of expression of DCX in the retina of the sea lamprey. In order to characterize the DCX expressing structures, the expression of acetylated α-tubulin (a neuronal marker) and cytokeratins (glial marker) was also analyzed. Tract-tracing methods were used to label ganglion cells. DCX immunoreactivity appeared initially in photoreceptors, ganglion cells and in fibers of the prolarval retina. In larvae smaller than 100 mm, DCX expression was observed in photoreceptors, in cells located in the inner nuclear and inner plexiform layers (IPLs) and in fibers coursing in the nuclear and IPLs, and in the optic nerve (ON). In retinas of premetamorphic and metamorphic larvae, DCX immunoreactivity was also observed in radially oriented cells and fibers and in a layer of cells located in the outer part of the inner neuroblastic layer (INbL) of the lateral retina. Photoreceptors and fibers ending in the outer limitans membrane (OLM) showed DCX expression in adults. Some retinal pigment epithelium cells were also DCX immunoreactive. Immunofluorescence for α-tubulin in premetamorphic larvae showed coexpression in most of the DCX immunoreactive structures. No cells/fibers were found showing DCX and cytokeratins colocalization. The perikaryon of mature ganglion cells is DCX negative. The expression of DCX in sea lamprey retinas suggests that it could play roles in the migration of cells that differentiate in the metamorphosis, in the establishment of connections of ganglion cells and in the development of photoreceptors. Our results also suggest that the radial glia and retinal pigment epithelium cells of lampreys are neurogenic. Comparison of our observations with those reported in gnathostomes reveals similarities and interesting differences probably due to the peculiar development of the sea lamprey retina.
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Affiliation(s)
- Blanca Fernández-López
- Faculty of Biology, Department of Cell Biology and Ecology, CIBUS, Universidade de Santiago de CompostelaSantiago de Compostela, Spain
| | - Daniel Romaus-Sanjurjo
- Faculty of Biology, Department of Cell Biology and Ecology, CIBUS, Universidade de Santiago de CompostelaSantiago de Compostela, Spain
| | - Pablo Senra-Martínez
- Faculty of Biology, Department of Cell Biology and Ecology, CIBUS, Universidade de Santiago de CompostelaSantiago de Compostela, Spain
| | - Ramón Anadón
- Faculty of Biology, Department of Cell Biology and Ecology, CIBUS, Universidade de Santiago de CompostelaSantiago de Compostela, Spain
| | - Antón Barreiro-Iglesias
- Faculty of Biology, Department of Cell Biology and Ecology, CIBUS, Universidade de Santiago de CompostelaSantiago de Compostela, Spain
| | - María Celina Rodicio
- Faculty of Biology, Department of Cell Biology and Ecology, CIBUS, Universidade de Santiago de CompostelaSantiago de Compostela, Spain
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