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Ma YY, Li X, Yu ZY, Luo T, Tan CR, Bai YD, Xu G, Sun BD, Bu XL, Liu YH, Jin WS, Gao YQ, Zhou XF, Liu J, Wang YJ. Oral antioxidant edaravone protects against cognitive deficits induced by chronic hypobaric hypoxia at high altitudes. Transl Psychiatry 2024; 14:415. [PMID: 39362869 PMCID: PMC11450176 DOI: 10.1038/s41398-024-03133-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Revised: 09/20/2024] [Accepted: 09/25/2024] [Indexed: 10/05/2024] Open
Abstract
Chronic hypobaric hypoxia at high altitudes can impair cognitive functions, especially causing deficits in learning and memory, which require therapeutic intervention. Here, we showed that mice subjected to hypobaric hypoxia (simulating an altitude of 5000 m) for one month experienced significant cognitive impairment, accompanied by increased biomarker levels of oxidative stress in the brain and blood. Oral administration of a novel formulation of edaravone, a free radical scavenger approved for the treatment of ischaemic stroke and amyotrophic lateral sclerosis, significantly alleviated oxidative stress and cognitive impairments caused by chronic hypobaric hypoxia. Furthermore, oral edaravone treatment also mitigated neuroinflammation and restored hippocampal neural stem cell exhaustion. Additionally, periostin (Postn) is vital in the cognitive deficits caused by chronic hypobaric hypoxia and may be a molecular target of edaravone. In conclusion, our results suggest that oxidative stress plays a crucial role in the cognitive deficits caused by chronic hypobaric hypoxia and that oral edaravone is a potential medicine for protecting against cognitive deficits caused by chronic hypobaric hypoxia in high-altitude areas.
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Affiliation(s)
- Yuan-Yuan Ma
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, 400042, China
- Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, 400042, China
- State Key Laboratory of Trauma and Chemical Poisoning, Chongqing, 400042, China
| | - Xin Li
- Army 953 Hospital, Shigatse Branch of Xinqiao Hospital, Third Military Medical University, Shigatse, 857000, China
| | - Zhong-Yuan Yu
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, 400042, China
- Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, 400042, China
- State Key Laboratory of Trauma and Chemical Poisoning, Chongqing, 400042, China
| | - Tong Luo
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, 400042, China
- Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, 400042, China
| | - Cheng-Rong Tan
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, 400042, China
- Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, 400042, China
- State Key Laboratory of Trauma and Chemical Poisoning, Chongqing, 400042, China
| | - Yu-Di Bai
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, 400042, China
- Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, 400042, China
- State Key Laboratory of Trauma and Chemical Poisoning, Chongqing, 400042, China
| | - Gang Xu
- Institute of Medicine and Equipment for High Altitude Region, College of High Altitude Military Medicine, Third Military Medical University, Chongqing, 400038, China
- Key Laboratory of Extreme Environmental Medicine, Ministry of Education of China, Chongqing, 400038, China
- Key Laboratory of High Altitude and Frigidzone Medical Support, PLA, Chongqing, 400038, China
| | - Bin-Da Sun
- Institute of Medicine and Equipment for High Altitude Region, College of High Altitude Military Medicine, Third Military Medical University, Chongqing, 400038, China
- Key Laboratory of Extreme Environmental Medicine, Ministry of Education of China, Chongqing, 400038, China
- Key Laboratory of High Altitude and Frigidzone Medical Support, PLA, Chongqing, 400038, China
| | - Xian-Le Bu
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, 400042, China
- Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, 400042, China
- State Key Laboratory of Trauma and Chemical Poisoning, Chongqing, 400042, China
| | - Yu-Hui Liu
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, 400042, China
- Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, 400042, China
- State Key Laboratory of Trauma and Chemical Poisoning, Chongqing, 400042, China
| | - Wang-Sheng Jin
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, 400042, China
- Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, 400042, China
- State Key Laboratory of Trauma and Chemical Poisoning, Chongqing, 400042, China
| | - Yu-Qi Gao
- Institute of Medicine and Equipment for High Altitude Region, College of High Altitude Military Medicine, Third Military Medical University, Chongqing, 400038, China
- Key Laboratory of Extreme Environmental Medicine, Ministry of Education of China, Chongqing, 400038, China
- Key Laboratory of High Altitude and Frigidzone Medical Support, PLA, Chongqing, 400038, China
| | - Xin-Fu Zhou
- Suzhou Auzone Biotech, Suzhou, 215123, China
- Health and Biomedical Innovation, Clinical and Health Sciences, University of South Australia, Adelaide, SA, 5000, Australia
| | - Juan Liu
- Department of Special Medicine, Daping Hospital, Third Military Medical University, Chongqing, 400042, China.
- Center for Hyperbaric Oxygen Medicine, Daping Hospital, Third Military Medical University, Chongqing, 400042, China.
| | - Yan-Jiang Wang
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, 400042, China.
- Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, 400042, China.
- State Key Laboratory of Trauma and Chemical Poisoning, Chongqing, 400042, China.
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Sakurai K, Ando T, Sakai Y, Mori Y, Nakamura S, Kato T, Ito H. PROX1 is a regulator of neuroendocrine-related gene expression in lung carcinoid. Hum Cell 2024; 37:1559-1566. [PMID: 39066858 DOI: 10.1007/s13577-024-01109-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2024] [Accepted: 07/21/2024] [Indexed: 07/30/2024]
Abstract
Lung neuroendocrine neoplasms (NENs) are a diverse group of tumors characterized by neuroendocrine (NE) differentiation. Among lung NENs, lung carcinoid (LC) is a rare tumor with unique characteristics. Recent research has highlighted the importance of transcription factors (TFs) in establishing gene expression programs in lung NENs such as small cell lung carcinoma. However, the TFs that control the gene expression of LC are largely unknown. In this study, we report the expression and potential function of a TF called Prospero homeobox protein1 (PROX1) in LC. Publicly available transcriptome data suggested that PROX1 was highly expressed in LC tissues, which was confirmed by immunohistochemical analysis on a tissue microarray. Knockdown of PROX1 did not impact the cellular viability of an LC-derived cell line, NCI-H727. Meanwhile, transcriptome analysis revealed that PROX1 knockdown altered the expression of genes involved in NE differentiation. ASCL1, CHGA, CALCA, and LINC00261 were suggested as downstream genes of PROX1. These findings indicate that PROX1 may play an important role in the NE identity of LC by regulating the expression of key target genes.
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Affiliation(s)
- Kouhei Sakurai
- Department of Joint Research Laboratory of Clinical Medicine, School of Medicine, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan.
| | - Tatsuya Ando
- Department of Joint Research Laboratory of Clinical Medicine, School of Medicine, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Yasuhiro Sakai
- Department of Tumor Pathology, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, 431-3192, Japan
| | - Yuichiro Mori
- School of Medicine, Fujita Health University, Toyoake, Aichi, 470-1192, Japan
| | - Satoru Nakamura
- Department of Joint Research Laboratory of Clinical Medicine, School of Medicine, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
- Central Research Laboratory, Nitto Fuji Flour Milling Co., Ltd., Tokyo, 143-0001, Japan
| | - Taku Kato
- Department of Joint Research Laboratory of Clinical Medicine, School of Medicine, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Hiroyasu Ito
- Department of Joint Research Laboratory of Clinical Medicine, School of Medicine, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
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3
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Eriksson ANM, Dubiel J, Alcaraz AJ, Doering JA, Wiseman S. Far from Their Origins: A Transcriptomic Investigation on How 2,4-Di-tert-butyl-6-(5-chloro-2H-benzotriazol-2-yl) Phenol Affects Rainbow Trout Alevins. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2024; 43:2026-2038. [PMID: 38923588 DOI: 10.1002/etc.5943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 04/08/2024] [Accepted: 06/04/2024] [Indexed: 06/28/2024]
Abstract
Benzotriazole ultraviolet stabilizers (BUVSs) are a group of widely used chemicals added to a variety of consumer (e.g., plastics) and industrial (e.g., metal coating) goods. Although detected globally as an environmentally persistent pollutant, BUVSs have received relatively little toxicological attention and only recently have been acknowledged to affect development and the endocrine system in vivo. In our previous study, altered behavior, indicative of potential neurotoxicity, was observed among rainbow trout alevins (day 14 posthatching) that were microinjected as embryos with a single environmentally relevant dose of 2,4-di-tert-butyl-6-(5-chloro-2H-benzotriazol-2-yl) phenol (UV-327). In the present follow-up study, we performed whole-transcriptome profiling (RNA sequencing) of newly hatched alevins from the same batch. The primary aim was to identify biomarkers related to behavior and neurology. Dose-specifically, 1 to 176 differentially expressed genes (DEGs) were identified. In the group presenting altered behavior (273.4 ng g-1), 176 DEGs were identified, yet only a fraction was related to neurological functions, including water, calcium, and potassium homeostasis; acetylcholine transmission and signaling; as well insulin and energy metabolism. The second objective was to estimate the transcriptomic point of departure (tPOD) and assess if point estimate(s) are protective of altered behavior. A tPOD was established at 35 to 94 ng UV-327 g-1 egg, making this tPOD protective of behavioral alterations. Holistically, these transcriptomic alterations provide a foundation for future research on how BUVSs can influence rainbow trout alevin development, while providing support to the hypothesis that UV-327 can influence neurogenesis and subsequent behavioral endpoints. The exact structural and functional changes caused by embryonic exposure to UV-327 remain enigmatic and will require extensive investigation before being deciphered and understood toxicologically. Environ Toxicol Chem 2024;43:2026-2038. © 2024 The Author(s). Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.
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Affiliation(s)
- Andreas N M Eriksson
- Department of Biological Sciences, University of Lethbridge, Lethbridge, Alberta, Canada
| | - Justin Dubiel
- Department of Biological Sciences, University of Lethbridge, Lethbridge, Alberta, Canada
| | - Alper James Alcaraz
- National Institute of Environmental Health Sciences, Bethesda, Maryland, USA
| | - Jon A Doering
- Department of Environmental Sciences, Louisiana State University, Baton Rouge, Louisiana, USA
| | - Steve Wiseman
- Department of Biological Sciences, University of Lethbridge, Lethbridge, Alberta, Canada
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4
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Read DF, Booth GT, Daza RM, Jackson DL, Gladden RG, Srivatsan SR, Ewing B, Franks JM, Spurrell CH, Gomes AR, O'Day D, Gogate AA, Martin BK, Larson H, Pfleger C, Starita L, Lin Y, Shendure J, Lin S, Trapnell C. Single-cell analysis of chromatin and expression reveals age- and sex-associated alterations in the human heart. Commun Biol 2024; 7:1052. [PMID: 39187646 PMCID: PMC11347658 DOI: 10.1038/s42003-024-06582-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 07/11/2024] [Indexed: 08/28/2024] Open
Abstract
Sex differences and age-related changes in the human heart at the tissue, cell, and molecular level have been well-documented and many may be relevant for cardiovascular disease. However, how molecular programs within individual cell types vary across individuals by age and sex remains poorly characterized. To better understand this variation, we performed single-nucleus combinatorial indexing (sci) ATAC- and RNA-Seq in human heart samples from nine donors. We identify hundreds of differentially expressed genes by age and sex and find epigenetic signatures of variation in ATAC-Seq data in this discovery cohort. We then scale up our single-cell RNA-Seq analysis by combining our data with five recently published single nucleus RNA-Seq datasets of healthy adult hearts. We find variation such as metabolic alterations by sex and immune changes by age in differential expression tests, as well as alterations in abundance of cardiomyocytes by sex and neurons with age. In addition, we compare our adult-derived ATAC-Seq profiles to analogous fetal cell types to identify putative developmental-stage-specific regulatory factors. Finally, we train predictive models of cell-type-specific RNA expression levels utilizing ATAC-Seq profiles to link distal regulatory sequences to promoters, quantifying the predictive value of a simple TF-to-expression regulatory grammar and identifying cell-type-specific TFs. Our analysis represents the largest single-cell analysis of cardiac variation by age and sex to date and provides a resource for further study of healthy cardiac variation and transcriptional regulation at single-cell resolution.
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Affiliation(s)
- David F Read
- Department of Genome Sciences, University of Washington, Seattle, WA, USA
| | - Gregory T Booth
- Department of Genome Sciences, University of Washington, Seattle, WA, USA
| | - Riza M Daza
- Department of Genome Sciences, University of Washington, Seattle, WA, USA
| | - Dana L Jackson
- Department of Genome Sciences, University of Washington, Seattle, WA, USA
| | - Rula Green Gladden
- Department of Genome Sciences, University of Washington, Seattle, WA, USA
| | - Sanjay R Srivatsan
- Department of Genome Sciences, University of Washington, Seattle, WA, USA
| | - Brent Ewing
- Department of Genome Sciences, University of Washington, Seattle, WA, USA
| | - Jennifer M Franks
- Department of Genome Sciences, University of Washington, Seattle, WA, USA
| | | | | | - Diana O'Day
- Brotman Baty Institute for Precision Medicine, Seattle, WA, USA
| | - Aishwarya A Gogate
- Brotman Baty Institute for Precision Medicine, Seattle, WA, USA
- Seattle Children's Research Institute, Seattle, WA, USA
| | - Beth K Martin
- Department of Genome Sciences, University of Washington, Seattle, WA, USA
| | - Haleigh Larson
- Brotman Baty Institute for Precision Medicine, Seattle, WA, USA
| | - Christian Pfleger
- University of Washington School of Medicine, Division of Cardiology, Seattle, WA, USA
| | - Lea Starita
- Department of Genome Sciences, University of Washington, Seattle, WA, USA
- Brotman Baty Institute for Precision Medicine, Seattle, WA, USA
| | - Yiing Lin
- Department of Surgery, Washington University, St Louis, MO, USA
| | - Jay Shendure
- Brotman Baty Institute for Precision Medicine, Seattle, WA, USA.
- Seattle Children's Research Institute, Seattle, WA, USA.
- Howard Hughes Medical Institute, Seattle, WA, USA.
- Allen Discovery Center for Cell Lineage Tracing, Seattle, WA, USA.
| | - Shin Lin
- University of Washington School of Medicine, Division of Cardiology, Seattle, WA, USA.
| | - Cole Trapnell
- Brotman Baty Institute for Precision Medicine, Seattle, WA, USA.
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5
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Chang L, Chen Q, Wang B, Liu J, Zhang M, Zhu W, Jiang J. Single cell RNA analysis uncovers the cell differentiation and functionalization for air breathing of frog lung. Commun Biol 2024; 7:665. [PMID: 38816547 PMCID: PMC11139932 DOI: 10.1038/s42003-024-06369-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 05/21/2024] [Indexed: 06/01/2024] Open
Abstract
The evolution and development of vertebrate lungs have been widely studied due to their significance in terrestrial adaptation. Amphibians possess the most primitive lungs among tetrapods, underscoring their evolutionary importance in bridging the transition from aquatic to terrestrial life. However, the intricate process of cell differentiation during amphibian lung development remains poorly understood. Using single-cell RNA sequencing, we identify 13 cell types in the developing lungs of a land-dwelling frog (Microhyla fissipes). We elucidate the differentiation trajectories and mechanisms of mesenchymal cells, identifying five cell fates and their respective driver genes. Using temporal dynamics analyses, we reveal the gene expression switches of epithelial cells, which facilitate air breathing during metamorphosis. Furthermore, by integrating the published data from another amphibian and two terrestrial mammals, we illuminate both conserved and divergent cellular repertoires during the evolution of tetrapod lungs. These findings uncover the frog lung cell differentiation trajectories and functionalization for breathing in air and provide valuable insights into the cell-type evolution of vertebrate lungs.
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Affiliation(s)
- Liming Chang
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, Sichuan, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Qiheng Chen
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, Sichuan, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Bin Wang
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, Sichuan, China
| | - Jiongyu Liu
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, Sichuan, China
| | - Meihua Zhang
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, Sichuan, China
| | - Wei Zhu
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, Sichuan, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Jianping Jiang
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, Sichuan, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
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6
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Ding Y, Li L, Wang S, Cao Y, Yang M, Dai Y, Lin H, Li J, Liu Y, Wang Z, Liu W, Tao J. Electroacupuncture promotes neurogenesis in the dentate gyrus and improves pattern separation in an early Alzheimer's disease mouse model. Biol Res 2023; 56:65. [PMID: 38041203 PMCID: PMC10693055 DOI: 10.1186/s40659-023-00472-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 11/03/2023] [Indexed: 12/03/2023] Open
Abstract
BACKGROUND Impaired pattern separation occurs in the early stage of Alzheimer's disease (AD), and hippocampal dentate gyrus (DG) neurogenesis participates in pattern separation. Here, we investigated whether spatial memory discrimination impairment can be improved by promoting the hippocampal DG granule cell neogenesis-mediated pattern separation in the early stage of AD by electroacupuncture (EA). METHODS Five familial AD mutations (5 × FAD) mice received EA treatment at Baihui and Shenting points for 4 weeks. During EA, mice were intraperitoneally injected with BrdU (50 mg/kg) twice a day. rAAV containing Wnt5a shRNA was injected into the bilateral DG region, and the viral efficiency was evaluated by detecting Wnt5a mRNA levels. Cognitive behavior tests were conducted to assess the impact of EA treatment on cognitive function. The hippocampal DG area Aβ deposition level was detected by immunohistochemistry after the intervention; The number of BrdU+/CaR+ cells and the gene expression level of calretinin (CaR) and prospero homeobox 1(Prox1) in the DG area of the hippocampus was detected to assess neurogenesis by immunofluorescence and western blotting after the intervention; The gene expression levels of FZD2, Wnt5a, DVL2, p-DVL2, CaMKII, and p-CaMKII in the Wnt signaling pathway were detected by Western blotting after the intervention. RESULTS Cognitive behavioral tests showed that 5 × FAD mice had impaired pattern separation (P < 0.001), which could be improved by EA (P < 0.01). Immunofluorescence and Western blot showed that the expression of Wnt5a in the hippocampus was decreased (P < 0.001), and the neurogenesis in the DG was impaired (P < 0.001) in 5 × FAD mice. EA could increase the expression level of Wnt5a (P < 0.05) and promote the neurogenesis of immature granule cells (P < 0.05) and the development of neuronal dendritic spines (P < 0.05). Interference of Wnt5a expression aggravated the damage of neurogenesis (P < 0.05), weakened the memory discrimination ability (P < 0.05), and inhibited the beneficial effect of EA (P < 0.05) in AD mice. The expression level of Wnt pathway related proteins such as FZD2, DVL2, p-DVL2, CAMKII, p-CAMKII increased after EA, but the effect of EA was inhibited after Wnt5a was knocked down. In addition, EA could reduce the deposition of Aβ plaques in the DG without any impact on Wnt5a. CONCLUSION EA can promote hippocampal DG immature granule cell neogenesis-mediated pattern separation to improve spatial memory discrimination impairment by regulating Wnt5a in 5 × FAD mice.
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Affiliation(s)
- Yanyi Ding
- The Institute of Rehabilitation Industry, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian, 350122, China
| | - Long Li
- The Institute of Rehabilitation Industry, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian, 350122, China
| | - Sinuo Wang
- The Institute of Rehabilitation Industry, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian, 350122, China
| | - Yajun Cao
- The Institute of Rehabilitation Industry, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian, 350122, China
| | - Minguang Yang
- The Institute of Rehabilitation Industry, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian, 350122, China
| | - Yaling Dai
- The Institute of Rehabilitation Industry, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian, 350122, China
| | - Huawei Lin
- The Institute of Rehabilitation Industry, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian, 350122, China
| | - Jianhong Li
- The Institute of Rehabilitation Industry, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian, 350122, China
| | - Yulu Liu
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian, 350122, China
| | - Zhifu Wang
- National-Local Joint Engineering Research Center of Rehabilitation Medicine Technology, Fuzhou, Fujian, 350122, China
- Fujian Key Laboratory of Cognitive Rehabilitation, Affiliated Rehabilitation Hospital of Fujian University of Traditional Chinese Medicine, Fuzhou, 350001, China
| | - Weilin Liu
- The Institute of Rehabilitation Industry, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian, 350122, China.
| | - Jing Tao
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian, 350122, China.
- Fujian Key Laboratory of Rehabilitation Technology, Affiliated Rehabilitation Hospital of Fujian University of Traditional Chinese Medicine, Fuzhou, 350001, China.
- Provincial and Ministerial Co-founded Collaborative Innovation Center of Rehabilitation Technology, Fujian University of Traditional Chinese Medicine, Fuzhou, 350122, China.
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7
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Liu PP, Lu SP, Li X, Tang GB, Liu X, Dai SK, Jiao LF, Lin XW, Li XG, Hu B, Jiao J, Teng ZQ, Han CS, Liu CM. Abnormal chromatin remodeling caused by ARID1A deletion leads to malformation of the dentate gyrus. Cell Death Differ 2023; 30:2187-2199. [PMID: 37543710 PMCID: PMC10483045 DOI: 10.1038/s41418-023-01199-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Revised: 07/15/2023] [Accepted: 07/27/2023] [Indexed: 08/07/2023] Open
Abstract
ARID1A, an SWI/SNF chromatin-remodeling gene, is commonly mutated in cancer and hypothesized to be a tumor suppressor. Recently, loss-of-function of ARID1A gene has been shown to cause intellectual disability. Here we generate Arid1a conditional knockout mice and investigate Arid1a function in the hippocampus. Disruption of Arid1a in mouse forebrain significantly decreases neural stem/progenitor cells (NSPCs) proliferation and differentiation to neurons within the dentate gyrus (DG), increasing perinatal and postnatal apoptosis, leading to reduced hippocampus size. Moreover, we perform single-cell RNA sequencing (scRNA-seq) to investigate cellular heterogeneity and reveal that Arid1a is necessary for the maintenance of the DG progenitor pool and survival of post-mitotic neurons. Transcriptome and ChIP-seq analysis data demonstrate that ARID1A specifically regulates Prox1 by altering the levels of histone modifications. Overexpression of downstream target Prox1 can rescue proliferation and differentiation defects of NSPCs caused by Arid1a deletion. Overall, our results demonstrate a critical role for Arid1a in the development of the hippocampus and may also provide insight into the genetic basis of intellectual disabilities such as Coffin-Siris syndrome, which is caused by germ-line mutations or microduplication of Arid1a.
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Affiliation(s)
- Pei-Pei Liu
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
- Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, 100101, China
- Beijing Institute for Stem Cell and Regenerative Medicine, Beijing, China
| | - Shi-Ping Lu
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
- Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, 100101, China
- Beijing Institute for Stem Cell and Regenerative Medicine, Beijing, China
| | - Xiao Li
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
- Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, 100101, China
- Beijing Institute for Stem Cell and Regenerative Medicine, Beijing, China
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Gang-Bin Tang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
- Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, 100101, China
- Beijing Institute for Stem Cell and Regenerative Medicine, Beijing, China
| | - Xiao Liu
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
- Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, 100101, China
- Beijing Institute for Stem Cell and Regenerative Medicine, Beijing, China
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shang-Kun Dai
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
- Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, 100101, China
- Beijing Institute for Stem Cell and Regenerative Medicine, Beijing, China
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Lin-Fei Jiao
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
- Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, 100101, China
- Beijing Institute for Stem Cell and Regenerative Medicine, Beijing, China
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xi-Wen Lin
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
- Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, 100101, China
- Beijing Institute for Stem Cell and Regenerative Medicine, Beijing, China
| | - Xing-Guo Li
- Graduate Institute of Biomedical Sciences, China Medical University, No.91, Hsueh-Shih Road, Taichung, 40402, Taiwan
| | - Baoyang Hu
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
- Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, 100101, China
- Beijing Institute for Stem Cell and Regenerative Medicine, Beijing, China
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jianwei Jiao
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
- Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, 100101, China
- Beijing Institute for Stem Cell and Regenerative Medicine, Beijing, China
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhao-Qian Teng
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China.
- Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, 100101, China.
- Beijing Institute for Stem Cell and Regenerative Medicine, Beijing, China.
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Chun-Sheng Han
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China.
- Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, 100101, China.
- Beijing Institute for Stem Cell and Regenerative Medicine, Beijing, China.
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Chang-Mei Liu
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China.
- Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, 100101, China.
- Beijing Institute for Stem Cell and Regenerative Medicine, Beijing, China.
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing, 100049, China.
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8
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Dalgin G, Tryba AK, Cohen AP, Park SY, Philipson LH, Greeley SAW, Garcia AJ. Developmental defects and impaired network excitability in a cerebral organoid model of KCNJ11 p.V59M-related neonatal diabetes. Sci Rep 2021; 11:21590. [PMID: 34732776 PMCID: PMC8566525 DOI: 10.1038/s41598-021-00939-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Accepted: 10/14/2021] [Indexed: 11/09/2022] Open
Abstract
The gene KCNJ11 encodes Kir6.2 a major subunit of the ATP-sensitive potassium channel (KATP) expressed in both the pancreas and brain. Heterozygous gain of function mutations in KCNJ11 can cause neonatal diabetes mellitus (NDM). In addition, many patients exhibit neurological defects ranging from modest learning disorders to severe cognitive dysfunction and seizures. However, it remains unclear to what extent these neurological deficits are due to direct brain-specific activity of mutant KATP. We have generated cerebral organoids derived from human induced pluripotent stem cells (hiPSCs) possessing the KCNJ11 mutation p.Val59Met (V59M) and from non-pathogenic/normal hiPSCs (i.e., control/WT). Control cerebral organoids developed neural networks that could generate stable synchronized bursting neuronal activity whereas those derived from V59M cerebral organoids showed reduced synchronization. Histocytochemical studies revealed a marked reduction in neurons localized to upper cortical layer-like structures in V59M cerebral organoids suggesting dysfunction in the development of cortical neuronal network. Examination of temporal transcriptional profiles of neural stem cell markers revealed an extended window of SOX2 expression in V59M cerebral organoids. Continuous treatment of V59M cerebral organoids with the KATP blocker tolbutamide partially rescued the neurodevelopmental differences. Our study demonstrates the utility of human cerebral organoids as an investigative platform for studying the effects of KCNJ11 mutations on neurophysiological outcome.
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Affiliation(s)
- Gokhan Dalgin
- Section of Endocrinology, Diabetes and Metabolism, Departments of Medicine and Pediatrics, Kovler Diabetes Center, The University of Chicago, Chicago, IL, USA.
| | - Andrew K Tryba
- Section of Pediatric Neurology, Department of Pediatrics, The University of Chicago, Chicago, IL, USA
| | - Ashley P Cohen
- Chicago Medical School, Rosalind Franklin University, North Chicago, IL, USA
| | - Soo-Young Park
- Section of Endocrinology, Diabetes and Metabolism, Departments of Medicine and Pediatrics, Kovler Diabetes Center, The University of Chicago, Chicago, IL, USA
| | - Louis H Philipson
- Section of Endocrinology, Diabetes and Metabolism, Departments of Medicine and Pediatrics, Kovler Diabetes Center, The University of Chicago, Chicago, IL, USA
| | - Siri Atma W Greeley
- Section of Endocrinology, Diabetes and Metabolism, Departments of Medicine and Pediatrics, Kovler Diabetes Center, The University of Chicago, Chicago, IL, USA
| | - Alfredo J Garcia
- Section of Emergency Medicine, Department of Medicine, Institute for Integrative Physiology, Grossman Institute for Neuroscience, The University of Chicago, Chicago, USA.
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9
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Ding K, Lai Z, Yang G, Zeng L. MiR-140-5p targets Prox1 to regulate the proliferation and differentiation of neural stem cells through the ERK/MAPK signaling pathway. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:671. [PMID: 33987369 PMCID: PMC8106095 DOI: 10.21037/atm-21-597] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Background The expression of miR-140-5p increased in the brain tissue of a bilateral common carotid artery ligation model, while the overexpression of miR-140-5p significantly decreased the number of neurons. The luciferase report experiment in the previous study proved that miR-140-5p negatively regulated one of the potential targets of Prospero-related homeobox 1 (Prox1). Therefore, we want to investigate the effect of miR-140-5p on the proliferation and differentiation of neural stem cells (NSCs) and the underlying mechanism. Methods Primary NSCs were extracted from pregnant ICR mice aged 16–18 days and induced to differentiate. After transient transfection with miR-140-5p mimic and inhibitor into NSCs, the cells were divided into five groups: blank, mimic normal control, mimic, inhibitor normal control, and inhibitor. Cell Counting Kit-8 (CCK-8) and 5-Bromo-2-deoxyUridine (BrDU), Ki-67 were used, and the diameter of neural spheres was measured to observe proliferation ability 48 h later. Doublecortin (DCX), glial fibrillary acidic protein (GFAP), microtubule-associated proteins 2 (MAP-2), synapsin I (SYN1), and postsynaptic density protein-95 (PSD-95) were stained to identify the effect of miR-140-5p on the differentiation ability of NSCs into neural precursor cells, astrocytes, and neurons and the expression of synapse-associated proteins. The expression of miR-140-5p, Prox1, p-ERK1/2, and ERK1/2 was analyzed by real time quantitative polymerase chain reaction (RT-qPCR) and Western blot analysis. Results While the expression of miR-140-5p decreased after NSC differentiation (P<0.05), the results of CCK-8, BrDU, and Ki-67 staining showed no significant difference in cell viability and the percentage of NSCs with proliferation ability (P>0.05). However, the neural spheres were shorter in the miR-140-5p overexpression group (P<0.05) and the expression of DCX, MAP2, synapsin I, and PSD-95 decreased, while the expression of GFAP increased after differentiation in the mimic group (P<0.05). In addition, the expression of Prox1 decreased and the expression of p-ERK1/2 protein increased (P<0.05), but the expression of ERK1/2 showed no significant difference (P>0.05) in the miR-140-5p overexpression group. Conclusions MiR-140-5p reduced the proliferation rate of NSCs, inhibited their differentiation into neurons, produced synapse-associated proteins, and promoted their differentiation into astrocytes. MiR-140-5p negatively regulated downstream target Prox1 and activated the ERK/MAPK signaling pathway.
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Affiliation(s)
- Kaiqi Ding
- Department of Neurology and Institute of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Zehua Lai
- Department of Neurology and Institute of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Guoyuan Yang
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Lili Zeng
- Department of Neurology and Institute of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
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10
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Tsampoula M, Tarampoulous I, Antoniadou I, Koutmani Y, Gkikas D, Vekrellis K, Politis PK. Nuclear Receptor NR5A2 Promotes Neuronal Identity in the Adult Hippocampus. Mol Neurobiol 2021; 58:1952-1962. [PMID: 33411242 DOI: 10.1007/s12035-020-02222-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 11/19/2020] [Indexed: 12/01/2022]
Abstract
Neurogenesis in the dentate gyrus (DG) of the adult hippocampus is actively involved in brain homeostasis. Thus, identification of novel regulators in adult neurogenesis could significantly contribute to new therapies. We have recently unraveled the regulatory role of NR5A2 (also known as LRH1), a druggable orphan nuclear receptor, in embryonic neurogenesis. However, its involvement in adult neurogenesis is still an open question. Here we show that NR5A2 is differentially expressed in the DG of the adult hippocampus with neurons exhibiting higher levels of expression than adult neural stem/progenitor cells (aNSCs), suggesting a correlation with neuronal differentiation. Notably, NR5A2 overexpression in ex vivo cultured aNSCs induces expression of Prox1, a critical regulator of adult hippocampal neurogenesis. In agreement, NR5A2 is sufficient to reduce proliferation, increase neuronal differentiation, and promote axon outgrowth. Moreover, depletion of NR5A2 in DG cells in vivo caused a decrease in the number of NeuN as well as Calbindin-positive neurons, indicating its necessity for the maintenance of neuronal identity. Our data propose a regulatory role of NR5A2 in neuronal differentiation and fate specification of adult hippocampal NSCs.
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Affiliation(s)
- Matina Tsampoula
- Center for Basic Research, Biomedical Research Foundation of the Academy of Athens, 4 Soranou Efesiou Str, 115 27, Athens, Greece
| | - Isaak Tarampoulous
- Center for Basic Research, Biomedical Research Foundation of the Academy of Athens, 4 Soranou Efesiou Str, 115 27, Athens, Greece
| | - Ivi Antoniadou
- Center for Basic Research, Biomedical Research Foundation of the Academy of Athens, 4 Soranou Efesiou Str, 115 27, Athens, Greece
| | - Yassemi Koutmani
- Center of Clinical, Experimental Surgery and Translational Research, Biomedical Research Foundation of the Academy of Athens, 4 Soranou Efesiou Str, 115 27, Athens, Greece
| | - Dimitrios Gkikas
- Center for Basic Research, Biomedical Research Foundation of the Academy of Athens, 4 Soranou Efesiou Str, 115 27, Athens, Greece
| | - Kostas Vekrellis
- Center for Basic Research, Biomedical Research Foundation of the Academy of Athens, 4 Soranou Efesiou Str, 115 27, Athens, Greece
| | - Panagiotis K Politis
- Center for Basic Research, Biomedical Research Foundation of the Academy of Athens, 4 Soranou Efesiou Str, 115 27, Athens, Greece.
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11
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Heger P, Zheng W, Rottmann A, Panfilio KA, Wiehe T. The genetic factors of bilaterian evolution. eLife 2020; 9:e45530. [PMID: 32672535 PMCID: PMC7535936 DOI: 10.7554/elife.45530] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 07/03/2020] [Indexed: 12/13/2022] Open
Abstract
The Cambrian explosion was a unique animal radiation ~540 million years ago that produced the full range of body plans across bilaterians. The genetic mechanisms underlying these events are unknown, leaving a fundamental question in evolutionary biology unanswered. Using large-scale comparative genomics and advanced orthology evaluation techniques, we identified 157 bilaterian-specific genes. They include the entire Nodal pathway, a key regulator of mesoderm development and left-right axis specification; components for nervous system development, including a suite of G-protein-coupled receptors that control physiology and behaviour, the Robo-Slit midline repulsion system, and the neurotrophin signalling system; a high number of zinc finger transcription factors; and novel factors that previously escaped attention. Contradicting the current view, our study reveals that genes with bilaterian origin are robustly associated with key features in extant bilaterians, suggesting a causal relationship.
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Affiliation(s)
- Peter Heger
- Institute for Genetics, Cologne Biocenter, University of CologneCologneGermany
| | - Wen Zheng
- Institute for Genetics, Cologne Biocenter, University of CologneCologneGermany
| | - Anna Rottmann
- Institute for Genetics, Cologne Biocenter, University of CologneCologneGermany
| | - Kristen A Panfilio
- Institute for Zoology: Developmental Biology, Cologne Biocenter, University of CologneCologneGermany
- School of Life Sciences, University of Warwick, Gibbet Hill CampusCoventryUnited Kingdom
| | - Thomas Wiehe
- Institute for Genetics, Cologne Biocenter, University of CologneCologneGermany
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12
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Samuels TJ, Arava Y, Järvelin AI, Robertson F, Lee JY, Yang L, Yang CP, Lee T, Ish-Horowicz D, Davis I. Neuronal upregulation of Prospero protein is driven by alternative mRNA polyadenylation and Syncrip-mediated mRNA stabilisation. Biol Open 2020; 9:bio049684. [PMID: 32205310 PMCID: PMC7225087 DOI: 10.1242/bio.049684] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 02/24/2020] [Indexed: 12/14/2022] Open
Abstract
During Drosophila and vertebrate brain development, the conserved transcription factor Prospero/Prox1 is an important regulator of the transition between proliferation and differentiation. Prospero level is low in neural stem cells and their immediate progeny, but is upregulated in larval neurons and it is unknown how this process is controlled. Here, we use single molecule fluorescent in situ hybridisation to show that larval neurons selectively transcribe a long prospero mRNA isoform containing a 15 kb 3' untranslated region, which is bound in the brain by the conserved RNA-binding protein Syncrip/hnRNPQ. Syncrip binding increases the stability of the long prospero mRNA isoform, which allows an upregulation of Prospero protein production. Adult flies selectively lacking the long prospero isoform show abnormal behaviour that could result from impaired locomotor or neurological activity. Our findings highlight a regulatory strategy involving alternative polyadenylation followed by differential post-transcriptional regulation.This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Tamsin J Samuels
- Department of Biochemistry, The University of Oxford, Oxford, OX1 3QU, UK
| | - Yoav Arava
- Department of Biochemistry, The University of Oxford, Oxford, OX1 3QU, UK
- Department of Biology Technion, Haifa, 32000, Israel
| | - Aino I Järvelin
- Department of Biochemistry, The University of Oxford, Oxford, OX1 3QU, UK
| | | | - Jeffrey Y Lee
- Department of Biochemistry, The University of Oxford, Oxford, OX1 3QU, UK
| | - Lu Yang
- Department of Biochemistry, The University of Oxford, Oxford, OX1 3QU, UK
| | - Ching-Po Yang
- Howard Hughes Medical Institute, Janelia Research Campus, 19700 Helix Drive, Ashburn, VA, 20147 USA
| | - Tzumin Lee
- Howard Hughes Medical Institute, Janelia Research Campus, 19700 Helix Drive, Ashburn, VA, 20147 USA
| | - David Ish-Horowicz
- Department of Biochemistry, The University of Oxford, Oxford, OX1 3QU, UK
- MRC Laboratory for Molecular Cell Biology, University College, London, WC1E 6BT UK
| | - Ilan Davis
- Department of Biochemistry, The University of Oxford, Oxford, OX1 3QU, UK
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13
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Host Transcription Factors in Hepatitis B Virus RNA Synthesis. Viruses 2020; 12:v12020160. [PMID: 32019103 PMCID: PMC7077322 DOI: 10.3390/v12020160] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 01/27/2020] [Accepted: 01/28/2020] [Indexed: 02/06/2023] Open
Abstract
The hepatitis B virus (HBV) chronically infects over 250 million people worldwide and is one of the leading causes of liver cancer and hepatocellular carcinoma. HBV persistence is due in part to the highly stable HBV minichromosome or HBV covalently closed circular DNA (cccDNA) that resides in the nucleus. As HBV replication requires the help of host transcription factors to replicate, focusing on host protein–HBV genome interactions may reveal insights into new drug targets against cccDNA. The structural details on such complexes, however, remain poorly defined. In this review, the current literature regarding host transcription factors’ interactions with HBV cccDNA is discussed.
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14
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Margarido AS, Le Guen L, Falco A, Faure S, Chauvet N, de Santa Barbara P. PROX1 is a specific and dynamic marker of sacral neural crest cells in the chicken intestine. J Comp Neurol 2019; 528:879-889. [PMID: 31658363 DOI: 10.1002/cne.24801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 08/31/2019] [Accepted: 10/16/2019] [Indexed: 01/29/2023]
Abstract
The enteric nervous system (ENS) is a complex network constituted of neurons and glial cells that ensures the intrinsic innervation of the gastrointestinal tract. ENS cells originate from vagal and sacral neural crest cells that are initially located at the border of the neural tube. In birds, sacral neural crest cells (sNCCs) first give rise to an extramural ganglionated structure (the so-called Nerve of Remak [NoR]) and to the pelvic plexus. Later, sNCCs enter the colon mesenchyme to colonize and contribute to the intrinsic innervation of the caudal part of the gut. However, no specific sNCC marker has been described. Here, we report the expression pattern of prospero-related homeobox 1 (PROX1) in the developing chick colon. PROX1 is a homeobox domain transcription factor that plays a role in cell type specification in various tissues. Using in situ hybridization and immunofluorescence techniques, we showed that PROX1 is expressed in sNCCs localized in the NoR and in the pelvic plexus. Then, using real-time quantitative PCR we found that PROX1 displays a strong and highly dynamic expression pattern during NoR development. Moreover, we demonstrated using in vivo cell tracing, that sNCCs are the source of the PROX1-positive cells within the NoR. Our results indicate that PROX1 is the first marker that specifically identifies sNCCs. This might help to better identify the role of the different neural crest cell populations in distal gut innervation, and consequently to improve the diagnosis of diseases linked to incomplete ENS formation, such as Hirschsprung's disease.
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Affiliation(s)
| | - Ludovic Le Guen
- PHYMEDEXP, Université de Montpellier, INSERM, CNRS, Montpellier, France
| | - Amandine Falco
- PHYMEDEXP, Université de Montpellier, INSERM, CNRS, Montpellier, France
| | - Sandrine Faure
- PHYMEDEXP, Université de Montpellier, INSERM, CNRS, Montpellier, France
| | - Norbert Chauvet
- PHYMEDEXP, Université de Montpellier, INSERM, CNRS, Montpellier, France
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15
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Zhao WN, Hylton NK, Wang J, Chindavong PS, Alural B, Kurtser I, Subramanian A, Mazitschek R, Perlis RH, Haggarty SJ. Activation of WNT and CREB signaling pathways in human neuronal cells in response to the Omega-3 fatty acid docosahexaenoic acid (DHA). Mol Cell Neurosci 2019; 99:103386. [PMID: 31202891 PMCID: PMC7001743 DOI: 10.1016/j.mcn.2019.06.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 06/11/2019] [Accepted: 06/12/2019] [Indexed: 02/06/2023] Open
Abstract
A subset of individuals with major depressive disorder (MDD) elects treatment with complementary and alternative medicines (CAMs), including the omega-3 fatty acids docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA). Previous studies in rodents suggest that DHA modulates neurodevelopmental processes, including adult neurogenesis and neuroplasticity, but the molecular and cellular mechanisms of DHA's potential therapeutic effect in the context of human neurobiology have not been well established. Here we sought to address this knowledge gap by investigating the effects of DHA using human iPSC-derived neural progenitor cells (NPCs) and post-mitotic neurons using pathway-selective reporter genes, multiplexed mRNA expression profiling, and a panel of metabolism-based viability assays. Finally, real-time, live-cell imaging was employed to monitor neurite outgrowth upon DHA treatment. Overall, these studies showed that DHA treatment (0-50 μM) significantly upregulated both WNT and CREB signaling pathways in human neuronal cells in a dose-dependent manner with 2- to 3-fold increases in pathway activation. Additionally, we observed that DHA treatment enhanced survival of iPSC-derived NPCs and differentiation of post-mitotic neurons with live-cell imaging, revealing increased neurite outgrowth with DHA treatment within 24 h. Taken together, this study provides evidence that DHA treatment activates critical pathways regulating neuroplasticity, which may contribute to enhanced neuronal cell viability and neuronal connectivity. The extent to which these pathways represent molecular mechanisms underlying the potential beneficial effects of omega-3 fatty acids in MDD and other brain disorders merits further investigation.
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Affiliation(s)
- Wen-Ning Zhao
- Chemical Neurobiology Laboratory, Center for Genomic Medicine, Massachusetts General Hospital, 185 Cambridge Street, Boston, MA 02114, United States of America; Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, United States of America; Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, United States of America
| | - Norma K Hylton
- Chemical Neurobiology Laboratory, Center for Genomic Medicine, Massachusetts General Hospital, 185 Cambridge Street, Boston, MA 02114, United States of America
| | - Jennifer Wang
- Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, United States of America; Center for Quantitative Health, Center for Genomic Medicine, Division of Clinical Research, Massachusetts General Hospital, 185 Cambridge Street, Boston, MA 02114, United States of America
| | - Peter S Chindavong
- Chemical Neurobiology Laboratory, Center for Genomic Medicine, Massachusetts General Hospital, 185 Cambridge Street, Boston, MA 02114, United States of America; Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, United States of America; Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, United States of America
| | - Begum Alural
- Chemical Neurobiology Laboratory, Center for Genomic Medicine, Massachusetts General Hospital, 185 Cambridge Street, Boston, MA 02114, United States of America; Department of Neuroscience, Institute of Health Sciences, Dokuz Eylul University, Izmir 35210, Turkey
| | - Iren Kurtser
- Chemical Neurobiology Laboratory, Center for Genomic Medicine, Massachusetts General Hospital, 185 Cambridge Street, Boston, MA 02114, United States of America; Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, United States of America; Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, United States of America
| | - Aravind Subramanian
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, United States of America
| | - Ralph Mazitschek
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, United States of America; Center for Systems Biology, Massachusetts General Hospital, 185 Cambridge Street, Boston, MA 02114, United States of America
| | - Roy H Perlis
- Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, United States of America; Center for Quantitative Health, Center for Genomic Medicine, Division of Clinical Research, Massachusetts General Hospital, 185 Cambridge Street, Boston, MA 02114, United States of America.
| | - Stephen J Haggarty
- Chemical Neurobiology Laboratory, Center for Genomic Medicine, Massachusetts General Hospital, 185 Cambridge Street, Boston, MA 02114, United States of America; Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, United States of America; Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, United States of America.
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16
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Meyer G, González-Arnay E, Moll U, Nemajerova A, Tissir F, González-Gómez M. Cajal-Retzius neurons are required for the development of the human hippocampal fissure. J Anat 2019; 235:569-589. [PMID: 30861578 DOI: 10.1111/joa.12947] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/10/2019] [Indexed: 01/14/2023] Open
Abstract
Cajal-Retzius neurons (CRN) are the main source of Reelin in the marginal zone of the developing neocortex and hippocampus (HC). They also express the transcription factor p73 and are complemented by later-appearing GABAergic Reelin+ interneurons. The human dorsal HC forms at gestational week 10 (GW10), when it develops a rudimentary Ammonic plate and incipient dentate migration, although the dorsal hippocampal fissure (HF) remains shallow and contains few CRN. The dorsal HC transforms into the indusium griseum (IG), concurrently with the rostro-caudal appearance of the corpus callosum, by GW14-17. Dorsal and ventral HC merge at the site of the former caudal hem, which is located at the level of the future atrium of the lateral ventricle and closely connected with the choroid plexus. The ventral HC forms at GW11 in the temporal lobe. The ventral HF is wide open at GW14-16 and densely populated by large numbers of CRNs. These are in intimate contact with the meninges and meningeal blood vessels, suggesting signalling through diverse pathways. At GW17, the fissure deepens and begins to fuse, although it is still marked by p73/Reelin+ CRNs. The p73KO mouse illustrates the importance of p73 in CRN for HF formation. In the mutant, Tbr1/Reelin+ CRNs are born in the hem but do not leave it and subsequently disappear, so that the mutant cortex and HC lack CRN from the onset of corticogenesis. The HF is absent, which leads to profound architectonic alterations of the HC. To determine which p73 isoform is important for HF formation, isoform-specific TAp73- and DeltaNp73-deficient embryonic and early postnatal mice were examined. In both mutants, the number of CRNs was reduced, but each of their phenotypes was much milder than in the global p73KO mutant missing both isoforms. In the TAp73KO mice, the HF of the dorsal HC failed to form, but was present in the ventral HC. In the DeltaNp73KO mice, the HC had a mild patterning defect along with a shorter HF. Complex interactions between both isoforms in CRNs may contribute to their crucial activity in the developing brain.
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Affiliation(s)
- Gundela Meyer
- Department of Basic Medical Sciences, University La Laguna, La Laguna, Spain
| | | | - Ute Moll
- Department of Pathology, Stony Brook University, Stony Brook, NY, USA
| | - Alice Nemajerova
- Department of Pathology, Stony Brook University, Stony Brook, NY, USA
| | - Fadel Tissir
- Developmental Neurobiology Group, Institute of NeuroScience, UCL Louvain, Brussels, Belgium
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17
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Fan W, Wang H, Zhang Y, Loh HH, Law PY, Xu C. Morphine regulates adult neurogenesis and contextual memory extinction via the PKCε/Prox1 pathway. Neuropharmacology 2018; 141:126-138. [PMID: 30170081 DOI: 10.1016/j.neuropharm.2018.08.031] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 08/21/2018] [Accepted: 08/24/2018] [Indexed: 02/08/2023]
Abstract
We have previously reported that the miR-181a/Prox1/Notch1 pathway mediates the effect of morphine on modulating lineage-specific differentiation of adult neural stem/progenitor cells (NSPCs) via a PKCε-dependent pathway, whereas fentanyl shows no such effect. However, the role of the PKCε/Prox1 pathway in mediating drug-associated contextual memory remains unknown. The current study investigated the effect of PKCε/Prox1 on morphine-induced inhibition of adult neurogenesis and drug-associated contextual memory in mice, while the effect of fentanyl was tested simultaneously. By using BrdU labeling, we were able to examine the lineages of differentiated NSPCs in adult DG. PKCε knockout blocked morphine's effects on inducing in vivo astrocyte-preferential differentiation of NSPCs, but did not alter NSPC lineages upon fentanyl treatment. Inhibited adult neurogenesis further resulted in prolonged extinction and enhanced reinstatement of morphine-induced CPP, as well as prolonged extinction of space reference memory indicated by the Morris water maze paradigm. However, after fentanyl administration, no significant changes were found between wild-type and PKCε knockout mice, during either CPP or water maze tasks. When the lentivirus encoding Nestin-promoter-controlled Prox1 cDNA was injected into hippocampi of wildtype and PKCε knockout adult mice to modulate PKCε/Prox1 activity, similar effects were discovered in adult mice injected with lentivirus encoding Prox1, and more dramatic effects were found in PKCε knockout mice with concurrent Prox1 overexpression. In conclusion, morphine mediates lineage-specific NSPC differentiation, inhibits adult neurogenesis and regulates contextual memory retention via the PKCε/Prox1 pathway, which are implicated in the eventual context-associated relapse.
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Affiliation(s)
- Wenxiang Fan
- State Key Laboratory of Natural Medicines, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, Jiangsu, 210009, People's Republic of China
| | - Helei Wang
- State Key Laboratory of Natural Medicines, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, Jiangsu, 210009, People's Republic of China
| | - Yue Zhang
- Department of Pharmacology, University of Minnesota Medical School, 6-120 Jackson Hall, 321 Church St. SE, Minneapolis, MN, 55455, USA
| | - Horace H Loh
- Department of Pharmacology, University of Minnesota Medical School, 6-120 Jackson Hall, 321 Church St. SE, Minneapolis, MN, 55455, USA
| | - Ping-Yee Law
- Department of Pharmacology, University of Minnesota Medical School, 6-120 Jackson Hall, 321 Church St. SE, Minneapolis, MN, 55455, USA
| | - Chi Xu
- State Key Laboratory of Natural Medicines, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, Jiangsu, 210009, People's Republic of China.
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18
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Shaikh MN, Tejedor FJ. Mnb/Dyrk1A orchestrates a transcriptional network at the transition from self-renewing neurogenic progenitors to postmitotic neuronal precursors. J Neurogenet 2018; 32:37-50. [PMID: 29495936 DOI: 10.1080/01677063.2018.1438427] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The Down syndrome and microcephaly related gene Mnb/Dyrk1A encodes an evolutionary conserved protein kinase subfamily that plays important roles in neurodevelopment. minibrain (mnb) mutants of Drosophila melanogaster (Dm) exhibit reduced adult brains due to neuronal deficits generated during larval development. These deficits are the consequence of the apoptotic cell death of numerous neuronal precursors that fail to properly exit the cell cycle and differentiate. We have recently found that in both the Dm larval brain and the embryonic vertebrate central nervous system (CNS), a transient expression of Mnb/Dyrk1A promotes the cell cycle exit of newborn neuronal precursors by upregulating the expression of the cyclin-dependent kinase inhibitor p27kip1 (called Dacapo in Dm). In the larval brain, Mnb performs this action by regulating the expression of three transcription factors, Asense (Ase), Deadpan (Dpn) and Prospero (Pros), which are key regulators of the self-renewal, proliferation, and terminal differentiation of neural progenitor cells. We have here studied in detail the cellular/temporal expression pattern of Ase, Dpn, Pros and Mnb, and have analyzed possible regulatory effects among them at the transitions from neurogenic progenitors to postmitotic neuronal precursors in the Dm larval brain. The emerging picture of this analysis reveals an intricate regulatory network in which Mnb appears to play a pivotal role helping to delineate the dynamics of the expression patterns of Ase, Dpn and Pros, as well as their specific functions in the aforementioned transitions. Our results also show that Ase, Dpn and Pros perform several cross-regulatory actions and contribute to shape the precise cellular/temporal expression pattern of Mnb. We propose that Mnb/Dyrk1A plays a central role in CNS neurogenesis by integrating molecular mechanisms that regulate progenitor self-renewal, cell cycle progression and neuronal differentiation.
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Affiliation(s)
- Mirja N Shaikh
- a Instituto de Neurociencias , CSIC and Universidad Miguel Hernandez , Alicante , Spain
| | - Francisco J Tejedor
- a Instituto de Neurociencias , CSIC and Universidad Miguel Hernandez , Alicante , Spain
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19
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Qin W, Chen S, Yang S, Xu Q, Xu C, Cai J. The Effect of Traditional Chinese Medicine on Neural Stem Cell Proliferation and Differentiation. Aging Dis 2017; 8:792-811. [PMID: 29344417 PMCID: PMC5758352 DOI: 10.14336/ad.2017.0428] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Accepted: 04/28/2017] [Indexed: 12/12/2022] Open
Abstract
Neural stem cells (NSCs) are special types of cells with the potential for self-renewal and multi-directional differentiation. NSCs are regulated by multiple pathways and pathway related transcription factors during the process of proliferation and differentiation. Numerous studies have shown that the compound medicinal preparations, single herbs, and herb extracts in traditional Chinese medicine (TCM) have specific roles in regulating the proliferation and differentiation of NSCs. In this study, we investigate the markers of NSCs in various stages of differentiation, the related pathways regulating the proliferation and differentiation, and the corresponding transcription factors in the pathways. We also review the influence of TCM on NSC proliferation and differentiation, to facilitate the development of TCM in neural regeneration and neurodegenerative diseases.
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Affiliation(s)
- Wei Qin
- 1Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
| | - Shiya Chen
- 1Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
| | - Shasha Yang
- 1Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
| | - Qian Xu
- 2College of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
| | - Chuanshan Xu
- 3School of Chinese Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Jing Cai
- 2College of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
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20
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Gualtieri F, Brégère C, Laws GC, Armstrong EA, Wylie NJ, Moxham TT, Guzman R, Boswell T, Smulders TV. Effects of Environmental Enrichment on Doublecortin and BDNF Expression along the Dorso-Ventral Axis of the Dentate Gyrus. Front Neurosci 2017; 11:488. [PMID: 28966570 PMCID: PMC5605570 DOI: 10.3389/fnins.2017.00488] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 08/17/2017] [Indexed: 01/09/2023] Open
Abstract
Adult hippocampal neurogenesis (AHN) in the dentate gyrus is known to respond to environmental enrichment, chronic stress, and many other factors. The function of AHN may vary across the septo-temporal axis of the hippocampus, as different subdivisions are responsible for different functions. The dorsal pole regulates cognitive-related behaviors, while the ventral pole mediates mood-related responses through the hypothalamic-pituitary-adrenal (HPA) axis. In this study, we investigate different methods of quantifying the effect of environmental enrichment on AHN in the dorsal and ventral parts of the dentate gyrus (dDG and vDG). To this purpose, 11-week-old female CD-1 mice were assigned for 8 days to one of two conditions: the Environmental Enrichment (E) group received (i) running wheels, (ii) larger cages, (iii) plastic tunnels, and (iv) bedding with male urine, while the Control (C) group received standard housing. Dorsal CA (Cornu Ammonis) and DG regions were larger in the E than the C animals. Distance run linearly predicted the volume of the dorsal hippocampus, as well as of the intermediate and ventral CA regions. In the dDG, the amount of Doublecortin (DCX) immunoreactivity was significantly higher in E than in C mice. Surprisingly, this pattern was the opposite in the vDG (C > E). Real-time PCR measurement of Dcx mRNA and DCX protein analysis using ELISA showed the same pattern. Brain Derived Neurotrophic Factor (BDNF) immunoreactivity and mRNA displayed no difference between E and C, suggesting that upregulation of DCX was not caused by changes in BDNF levels. BDNF levels were higher in vDG than in dDG, as measured by both methods. Bdnf expression in vDG correlated positively with the distance run by individual E mice. The similarity in the patterns of immunoreactivity, mRNA and protein for differential DCX expression and for BDNF distribution suggests that the latter two methods might be effective tools for more rapid quantification of AHN.
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Affiliation(s)
- Fabio Gualtieri
- Centre for Behaviour and Evolution, Institute of Neuroscience, Newcastle UniversityNewcastle upon Tyne, United Kingdom
| | - Catherine Brégère
- Brain Ischemia and Regeneration, Department of Biomedicine and Department of Neurosurgery, University Hospital BaselBasel, Switzerland
| | - Grace C Laws
- Centre for Behaviour and Evolution, Institute of Neuroscience, Newcastle UniversityNewcastle upon Tyne, United Kingdom
| | - Elena A Armstrong
- Centre for Behaviour and Evolution, Institute of Neuroscience, Newcastle UniversityNewcastle upon Tyne, United Kingdom.,School of Psychology, Newcastle UniversityNewcastle upon Tyne, United Kingdom
| | - Nicholas J Wylie
- School of Psychology, Newcastle UniversityNewcastle upon Tyne, United Kingdom
| | - Theo T Moxham
- School of Psychology, Newcastle UniversityNewcastle upon Tyne, United Kingdom
| | - Raphael Guzman
- Brain Ischemia and Regeneration, Department of Biomedicine and Department of Neurosurgery, University Hospital BaselBasel, Switzerland
| | - Timothy Boswell
- Centre for Behaviour and Evolution, Institute of Neuroscience, Newcastle UniversityNewcastle upon Tyne, United Kingdom.,School of Natural and Environmental Sciences, Newcastle UniversityNewcastle upon Tyne, United Kingdom
| | - Tom V Smulders
- Centre for Behaviour and Evolution, Institute of Neuroscience, Newcastle UniversityNewcastle upon Tyne, United Kingdom
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21
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Time-lapse imaging reveals highly dynamic structural maturation of postnatally born dentate granule cells in organotypic entorhino-hippocampal slice cultures. Sci Rep 2017; 7:43724. [PMID: 28256620 PMCID: PMC5335612 DOI: 10.1038/srep43724] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Accepted: 01/27/2017] [Indexed: 12/18/2022] Open
Abstract
Neurogenesis of hippocampal granule cells (GCs) persists throughout mammalian life and is important for learning and memory. How newborn GCs differentiate and mature into an existing circuit during this time period is not yet fully understood. We established a method to visualize postnatally generated GCs in organotypic entorhino-hippocampal slice cultures (OTCs) using retroviral (RV) GFP-labeling and performed time-lapse imaging to study their morphological development in vitro. Using anterograde tracing we could, furthermore, demonstrate that the postnatally generated GCs in OTCs, similar to adult born GCs, grow into an existing entorhino-dentate circuitry. RV-labeled GCs were identified and individual cells were followed for up to four weeks post injection. Postnatally born GCs exhibited highly dynamic structural changes, including dendritic growth spurts but also retraction of dendrites and phases of dendritic stabilization. In contrast, older, presumably prenatally born GCs labeled with an adeno-associated virus (AAV), were far less dynamic. We propose that the high degree of structural flexibility seen in our preparations is necessary for the integration of newborn granule cells into an already existing neuronal circuit of the dentate gyrus in which they have to compete for entorhinal input with cells generated and integrated earlier.
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22
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Kivelä R, Salmela I, Nguyen YH, Petrova TV, Koistinen HA, Wiener Z, Alitalo K. The transcription factor Prox1 is essential for satellite cell differentiation and muscle fibre-type regulation. Nat Commun 2016; 7:13124. [PMID: 27731315 PMCID: PMC5064023 DOI: 10.1038/ncomms13124] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Accepted: 09/05/2016] [Indexed: 02/06/2023] Open
Abstract
The remarkable adaptive and regenerative capacity of skeletal muscle is regulated by several transcription factors and pathways. Here we show that the transcription factor Prox1 is an important regulator of myoblast differentiation and of slow muscle fibre type. In both rodent and human skeletal muscles Prox1 is specifically expressed in slow muscle fibres and in muscle stem cells called satellite cells. Prox1 activates the NFAT signalling pathway and is necessary and sufficient for the maintenance of the gene program of slow muscle fibre type. Using lineage-tracing we show that Prox1-positive satellite cells differentiate into muscle fibres. Furthermore, we provide evidence that Prox1 is a critical transcription factor for the differentiation of myoblasts via bi-directional crosstalk with Notch1. These results identify Prox1 as an essential transcription factor that regulates skeletal muscle phenotype and myoblast differentiation by interacting with the NFAT and Notch pathways. Skeletal muscle has remarkable adaptive and regenerative capacity. Here the authors show that the transcription factor Prox1 is necessary for maintenance of slow muscle fibre types via activation of NFAT signalling, and for myoblast differentiation via cross-talk with the Notch signalling pathway.
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Affiliation(s)
- Riikka Kivelä
- Wihuri Research Institute, Biomedicum Helsinki, Haartmaninkatu 8, Helsinki 00290, Finland.,Translational Cancer Biology Program, Faculty of Medicine, University of Helsinki, P.O. Box 63, Helsinki 00014, Finland
| | - Ida Salmela
- Wihuri Research Institute, Biomedicum Helsinki, Haartmaninkatu 8, Helsinki 00290, Finland.,Translational Cancer Biology Program, Faculty of Medicine, University of Helsinki, P.O. Box 63, Helsinki 00014, Finland
| | - Yen Hoang Nguyen
- Minerva Foundation Institute for Medical Research, Biomedicum Helsinki 2U, Tukholmankatu 8, Helsinki 00290, Finland.,Department of Medicine and Abdominal Center: Endocrinology, University of Helsinki and Helsinki University Central Hospital, Haartmaninkatu 4, P.O. Box 340, Helsinki 00029, Finland
| | - Tatiana V Petrova
- Department of Fundamental Oncology, Centre Hospitalier Universitaire Vaudois (CHUV) and University of Lausanne (UNIL), and Division of Experimental Pathology, Institute of Pathology, CHUV, CH-1066 Epalinges, Switzerland
| | - Heikki A Koistinen
- Minerva Foundation Institute for Medical Research, Biomedicum Helsinki 2U, Tukholmankatu 8, Helsinki 00290, Finland.,Department of Medicine and Abdominal Center: Endocrinology, University of Helsinki and Helsinki University Central Hospital, Haartmaninkatu 4, P.O. Box 340, Helsinki 00029, Finland
| | - Zoltan Wiener
- Translational Cancer Biology Program, Faculty of Medicine, University of Helsinki, P.O. Box 63, Helsinki 00014, Finland
| | - Kari Alitalo
- Wihuri Research Institute, Biomedicum Helsinki, Haartmaninkatu 8, Helsinki 00290, Finland.,Translational Cancer Biology Program, Faculty of Medicine, University of Helsinki, P.O. Box 63, Helsinki 00014, Finland
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23
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Beltz BS, Brenneis G, Benton JL. Adult Neurogenesis: Lessons from Crayfish and the Elephant in the Room. BRAIN, BEHAVIOR AND EVOLUTION 2016; 87:146-155. [DOI: 10.1159/000447084] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The 1st-generation neural precursors in the crustacean brain are functionally analogous to neural stem cells in mammals. Their slow cycling, migration of their progeny, and differentiation of their descendants into neurons over several weeks are features of the neural precursor lineage in crayfish that also characterize adult neurogenesis in mammals. However, the 1st-generation precursors in crayfish do not self-renew, contrasting with conventional wisdom that proposes the long-term self-renewal of adult neural stem cells. Nevertheless, the crayfish neurogenic niche, which contains a total of 200-300 cells, is never exhausted and neurons continue to be produced in the brain throughout the animal's life. The pool of neural precursors in the niche therefore cannot be a closed system, and must be replenished from an extrinsic source. Our in vitro and in vivo data show that cells originating in the innate immune system (but not other cell types) are attracted to and incorporated into the neurogenic niche, and that they express a niche-specific marker, glutamine synthetase. Further, labeled hemocytes that undergo adoptive transfer to recipient crayfish generate cells in neuronal clusters in the olfactory pathway of the adult brain. These hemocyte descendants express appropriate neurotransmitters and project to target areas typical of neurons in these regions. These studies indicate that under natural conditions, the immune system provides neural precursors supporting adult neurogenesis in the crayfish brain, challenging the canonical view that ectodermal tissues generating the embryonic nervous system are the sole source of neurons in the adult brain. However, these are not the first studies that directly implicate the immune system as a source of neural precursor cells. Several types of data in mammals, including adoptive transfers of bone marrow or stem cells as well as the presence of fetal microchimerism, suggest that there must be a population of cells that are able to access the brain and generate new neurons in these species.
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24
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Froldi F, Cheng LY. Understanding how differentiation is maintained: lessons from the Drosophila brain. Cell Mol Life Sci 2016; 73:1641-4. [PMID: 26817462 PMCID: PMC11108259 DOI: 10.1007/s00018-016-2144-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Revised: 01/14/2016] [Accepted: 01/18/2016] [Indexed: 12/19/2022]
Abstract
The ability to maintain cells in a differentiated state and to prevent them from reprogramming into a multipotent state has recently emerged as a central theme in neural development as well as in oncogenesis. In the developing central nervous system (CNS) of the fruit fly Drosophila, several transcription factors were recently identified to be required in postmitotic cells to maintain differentiation, and in their absence, mature neurons undergo dedifferentiation, giving rise to proliferative neural stem cells and ultimately to tumor growth. In this review, we will highlight the current understanding of dedifferentiation and cell plasticity in the Drosophila CNS.
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Affiliation(s)
- Francesca Froldi
- Peter MacCallum Cancer Centre, East Melbourne, VIC, 3002, Australia
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Louise Y Cheng
- Peter MacCallum Cancer Centre, East Melbourne, VIC, 3002, Australia.
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, VIC, 3010, Australia.
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25
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Kaser-Eichberger A, Schroedl F, Bieler L, Trost A, Bogner B, Runge C, Tempfer H, Zaunmair P, Kreutzer C, Traweger A, Reitsamer HA, Couillard-Despres S. Expression of Lymphatic Markers in the Adult Rat Spinal Cord. Front Cell Neurosci 2016; 10:23. [PMID: 26903808 PMCID: PMC4746237 DOI: 10.3389/fncel.2016.00023] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Accepted: 01/25/2016] [Indexed: 12/29/2022] Open
Abstract
Under physiological conditions, lymphatic vessels are thought to be absent from the central nervous system (CNS), although they are widely distributed within the rest of the body. Recent work in the eye, i.e., another organ regarded as alymphatic, revealed numerous cells expressing lymphatic markers. As the latter can be involved in the response to pathological conditions, we addressed the presence of cells expressing lymphatic markers within the spinal cord by immunohistochemistry. Spinal cord of young adult Fisher rats was scrutinized for the co-expression of the lymphatic markers PROX1 and LYVE-1 with the cell type markers Iba1, CD68, PGP9.5, OLIG2. Rat skin served as positive control for the lymphatic markers. PROX1-immunoreactivity was detected in many nuclei throughout the spinal cord white and gray matter. These nuclei showed no association with LYVE-1. Expression of LYVE-1 could only be detected in cells at the spinal cord surface and in cells closely associated with blood vessels. These cells were found to co-express Iba1, a macrophage and microglia marker. Further, double labeling experiments using CD68, another marker found in microglia and macrophages, also displayed co-localization in the Iba1+ cells located at the spinal cord surface and those apposed to blood vessels. On the other hand, PROX1-expressing cells found in the parenchyma were lacking Iba1 or PGP9.5, but a significant fraction of those cells showed co-expression of the oligodendrocyte lineage marker OLIG2. Intriguingly, following spinal cord injury, LYVE-1-expressing cells assembled and reorganized into putative pre-vessel structures. As expected, the rat skin used as positive controls revealed classical lymphatic vessels, displaying PROX1+ nuclei surrounded by LYVE-1-immunoreactivity. Classical lymphatics were not detected in adult rat spinal cord. Nevertheless, numerous cells expressing either LYVE-1 or PROX1 were identified. Based on their localization and overlapping expression with Iba1, the LYVE-1+ cell population likely represents a macrophage subpopulation, while a significant fraction of PROX1+ cells belong to the oligodendrocytic lineage based on their distribution and the expression of OLIG2. The response of these LYVE-1+ and PROX1+ cell subpopulations to pathological conditions, especially in spinal cord inflammatory conditions, needs to be further elucidated.
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Affiliation(s)
- Alexandra Kaser-Eichberger
- University Clinic of Ophthalmology and Optometry, Research Program for Experimental Ophthalmology and Glaucoma Research, Paracelsus Medical University Salzburg, Austria
| | - Falk Schroedl
- University Clinic of Ophthalmology and Optometry, Research Program for Experimental Ophthalmology and Glaucoma Research, Paracelsus Medical UniversitySalzburg, Austria; Institute of Anatomy, Paracelsus Medical UniversitySalzburg, Austria
| | - Lara Bieler
- Institute of Experimental Neuroregeneration, Paracelsus Medical UniversitySalzburg, Austria; Spinal Cord Injury and Tissue Regeneration Center Salzburg, (SCI-TReCS), Paracelsus Medical UniversitySalzburg, Austria
| | - Andrea Trost
- University Clinic of Ophthalmology and Optometry, Research Program for Experimental Ophthalmology and Glaucoma Research, Paracelsus Medical University Salzburg, Austria
| | - Barbara Bogner
- University Clinic of Ophthalmology and Optometry, Research Program for Experimental Ophthalmology and Glaucoma Research, Paracelsus Medical University Salzburg, Austria
| | - Christian Runge
- University Clinic of Ophthalmology and Optometry, Research Program for Experimental Ophthalmology and Glaucoma Research, Paracelsus Medical University Salzburg, Austria
| | - Herbert Tempfer
- Institute of Tendon and Bone Regeneration, Paracelsus Medical UniversitySalzburg, Austria; Austrian Cluster for Tissue RegenerationVienna, Austria
| | - Pia Zaunmair
- Institute of Experimental Neuroregeneration, Paracelsus Medical UniversitySalzburg, Austria; Spinal Cord Injury and Tissue Regeneration Center Salzburg, (SCI-TReCS), Paracelsus Medical UniversitySalzburg, Austria
| | - Christina Kreutzer
- Institute of Experimental Neuroregeneration, Paracelsus Medical UniversitySalzburg, Austria; Spinal Cord Injury and Tissue Regeneration Center Salzburg, (SCI-TReCS), Paracelsus Medical UniversitySalzburg, Austria
| | - Andreas Traweger
- Institute of Tendon and Bone Regeneration, Paracelsus Medical UniversitySalzburg, Austria; Austrian Cluster for Tissue RegenerationVienna, Austria
| | - Herbert A Reitsamer
- University Clinic of Ophthalmology and Optometry, Research Program for Experimental Ophthalmology and Glaucoma Research, Paracelsus Medical University Salzburg, Austria
| | - Sebastien Couillard-Despres
- Institute of Experimental Neuroregeneration, Paracelsus Medical UniversitySalzburg, Austria; Spinal Cord Injury and Tissue Regeneration Center Salzburg, (SCI-TReCS), Paracelsus Medical UniversitySalzburg, Austria
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26
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Effects of addictive drugs on adult neural stem/progenitor cells. Cell Mol Life Sci 2015; 73:327-48. [PMID: 26468052 DOI: 10.1007/s00018-015-2067-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 10/04/2015] [Accepted: 10/08/2015] [Indexed: 12/18/2022]
Abstract
Neural stem/progenitor cells (NSPCs) undergo a series of developmental processes before giving rise to newborn neurons, astrocytes and oligodendrocytes in adult neurogenesis. During the past decade, the role of NSPCs has been highlighted by studies on adult neurogenesis modulated by addictive drugs. It has been proven that these drugs regulate the proliferation, differentiation and survival of adult NSPCs in different manners, which results in the varying consequences of adult neurogenesis. The effects of addictive drugs on NSPCs are exerted via a variety of different mechanisms and pathways, which interact with one another and contribute to the complexity of NSPC regulation. Here, we review the effects of different addictive drugs on NSPCs, and the related experimental methods and paradigms. We also discuss the current understanding of major signaling molecules, especially the putative common mechanisms, underlying such effects. Finally, we review the future directions of research in this area.
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27
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Obiorah M, McCandlish E, Buckley B, DiCicco-Bloom E. Hippocampal developmental vulnerability to methylmercury extends into prepubescence. Front Neurosci 2015; 9:150. [PMID: 26029035 PMCID: PMC4429234 DOI: 10.3389/fnins.2015.00150] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2014] [Accepted: 04/14/2015] [Indexed: 12/27/2022] Open
Abstract
The developing brain is sensitive to environmental toxicants such as methylmercury (MeHg), to which humans are exposed via contaminated seafood. Prenatal exposure in children is associated with learning, memory and IQ deficits, which can result from hippocampal dysfunction. To explore underlying mechanisms, we have used the postnatal day (P7) rat to model the third trimester of human gestation. We previously showed that a single low exposure (0.6 μg/gbw) that approaches human exposure reduced hippocampal neurogenesis in the dentate gyrus (DG) 24 h later, producing later proliferation and memory deficits in adolescence. Yet, the vulnerable stem cell population and period of developmental vulnerability remain undefined. In this study, we find that P7 exposure of stem cells has long-term consequences for adolescent neurogenesis. It reduced the number of mitotic S-phase cells (BrdU), especially those in the highly proliferative Tbr2+ population, and immature neurons (Doublecortin) in adolescence, suggesting partial depletion of the later stem cell pool. To define developmental vulnerability to MeHg in prepubescent (P14) and adolescent (P21) rats, we examined acute 24 h effects of MeHg exposure on mitosis and apoptosis. We found that low exposure did not adversely impact neurogenesis at either age, but that a higher exposure (5 μg/gbw) at P14 reduced the total number of neural stem cells (Sox2+) by 23% and BrdU+ cells by 26% in the DG hilus, suggesting that vulnerability diminishes with age. To determine whether these effects reflect changes in MeHg transfer across the blood brain barrier (BBB), we assessed Hg content in the hippocampus after peripheral injection and found that similar levels (~800 ng/gm) were obtained at 24 h at both P14 and P21, declining in parallel, suggesting that changes in vulnerability depend more on local tissue and cellular mechanisms. Together, we show that MeHg vulnerability declines with age, and that early exposure impairs later neurogenesis in older juveniles.
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Affiliation(s)
- Maryann Obiorah
- Department of Neuroscience and Cell Biology, Rutgers Robert Wood Johnson Medical School, Rutgers The State University of New Jersey Piscataway, NJ, USA
| | - Elizabeth McCandlish
- Environmental and Occupational Health Sciences Institute, Rutgers The State University of New Jersey Piscataway, NJ, USA
| | - Brian Buckley
- Environmental and Occupational Health Sciences Institute, Rutgers The State University of New Jersey Piscataway, NJ, USA
| | - Emanuel DiCicco-Bloom
- Department of Neuroscience and Cell Biology, Rutgers Robert Wood Johnson Medical School, Rutgers The State University of New Jersey Piscataway, NJ, USA ; Department of Pediatrics, Rutgers Robert Wood Johnson Medical School, Rutgers The State University of New Jersey New Brunswick, NJ, USA
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28
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Obiorah M, McCandlish E, Buckley B, DiCicco-Bloom E. Hippocampal developmental vulnerability to methylmercury extends into prepubescence. Front Neurosci 2015. [PMID: 26029035 DOI: 10.3389/fnins.2015.00150/abstract] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
The developing brain is sensitive to environmental toxicants such as methylmercury (MeHg), to which humans are exposed via contaminated seafood. Prenatal exposure in children is associated with learning, memory and IQ deficits, which can result from hippocampal dysfunction. To explore underlying mechanisms, we have used the postnatal day (P7) rat to model the third trimester of human gestation. We previously showed that a single low exposure (0.6 μg/gbw) that approaches human exposure reduced hippocampal neurogenesis in the dentate gyrus (DG) 24 h later, producing later proliferation and memory deficits in adolescence. Yet, the vulnerable stem cell population and period of developmental vulnerability remain undefined. In this study, we find that P7 exposure of stem cells has long-term consequences for adolescent neurogenesis. It reduced the number of mitotic S-phase cells (BrdU), especially those in the highly proliferative Tbr2+ population, and immature neurons (Doublecortin) in adolescence, suggesting partial depletion of the later stem cell pool. To define developmental vulnerability to MeHg in prepubescent (P14) and adolescent (P21) rats, we examined acute 24 h effects of MeHg exposure on mitosis and apoptosis. We found that low exposure did not adversely impact neurogenesis at either age, but that a higher exposure (5 μg/gbw) at P14 reduced the total number of neural stem cells (Sox2+) by 23% and BrdU+ cells by 26% in the DG hilus, suggesting that vulnerability diminishes with age. To determine whether these effects reflect changes in MeHg transfer across the blood brain barrier (BBB), we assessed Hg content in the hippocampus after peripheral injection and found that similar levels (~800 ng/gm) were obtained at 24 h at both P14 and P21, declining in parallel, suggesting that changes in vulnerability depend more on local tissue and cellular mechanisms. Together, we show that MeHg vulnerability declines with age, and that early exposure impairs later neurogenesis in older juveniles.
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Affiliation(s)
- Maryann Obiorah
- Department of Neuroscience and Cell Biology, Rutgers Robert Wood Johnson Medical School, Rutgers The State University of New Jersey Piscataway, NJ, USA
| | - Elizabeth McCandlish
- Environmental and Occupational Health Sciences Institute, Rutgers The State University of New Jersey Piscataway, NJ, USA
| | - Brian Buckley
- Environmental and Occupational Health Sciences Institute, Rutgers The State University of New Jersey Piscataway, NJ, USA
| | - Emanuel DiCicco-Bloom
- Department of Neuroscience and Cell Biology, Rutgers Robert Wood Johnson Medical School, Rutgers The State University of New Jersey Piscataway, NJ, USA ; Department of Pediatrics, Rutgers Robert Wood Johnson Medical School, Rutgers The State University of New Jersey New Brunswick, NJ, USA
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