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Cen K, Zhou J, Yang X, Guo Y, Xiao Y. Lymphocyte antigen 6 family member E suppresses apoptosis and promotes pancreatic cancer growth and migration via Wnt/β-catenin pathway activation. Sci Rep 2024; 14:20196. [PMID: 39215036 PMCID: PMC11364638 DOI: 10.1038/s41598-024-70764-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2024] [Accepted: 08/21/2024] [Indexed: 09/04/2024] Open
Abstract
Pancreatic cancer (PC) is the primary cause of cancer-related mortality. Due to the absence of reliable biomarkers for predicting prognosis or guiding treatment, there is an urgent need for molecular studies on PC. Lymphocyte antigen 6 family member E (LY6E) is implicated in uncontrolled cell growth across various cancers. However, the precise mechanism of LY6E in PC remains unclear. Here, we conducted comprehensive bioinformatic analyses using online tools and R- × 64-4.1.1, complemented by experimental validation through Western blotting, immunohistochemistry, immunosorbent assays, flow cytometry, cell assays, and animal models. Our findings reveal significantly elevated expression of LY6E in PC, correlating with poor prognosis. LY6E knockdown inhibited proliferation, invasion, and migration of PC cells, while enhancing apoptosis evidenced by increased cleaved caspase 3 levels and alterations in the Bcl-2/Bax ratio. Conversely, LY6E overexpression promoted PC cell proliferation and migration, and inhibited apoptosis. Mechanistically, LY6E downregulation suppressed the Wnt/β-catenin signaling pathway. In vivo studies demonstrated that LY6E suppression attenuated tumor growth in murine models. Additionally, LY6E suppression resulted in reduced tumor growth in mice. In conclusion, our study confirms the significant role of LY6E in the progression of PC. LY6E, serving as an independent prognostic indicator, has the potential to serve as a valuable biomarker for PC to inform treatment strategies.
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Affiliation(s)
- Kenan Cen
- The Dingli Clinical College of Wenzhou Medical University, Wenzhou, China, 325000
| | - Jingyao Zhou
- Department of Pharmacy, Taizhou Central Hospital, Taizhou, China
| | - Xuejia Yang
- Zhejiang Key Laboratory of Intelligent Cancer Biomarker Discovery and Translation, The First Affiliated Hospital, Wenzhou Medical University, Wenzhou, 325035, China
| | - Yangyang Guo
- Zhejiang Key Laboratory of Intelligent Cancer Biomarker Discovery and Translation, The First Affiliated Hospital, Wenzhou Medical University, Wenzhou, 325035, China
| | - Yanyi Xiao
- Department of Thyroid and Breast Surgery, The Second Affiliated Hospital of Shanghai University, Wenzhou, 325000, Zhejiang Province, China.
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Jiménez A, Organista-Juárez D, Torres-Castro A, Guzmán-Ruíz MA, Estudillo E, Guevara-Guzmán R. Olfactory Dysfunction in Diabetic Rats is Associated with miR-146a Overexpression and Inflammation. Neurochem Res 2020; 45:1781-1790. [PMID: 32405762 DOI: 10.1007/s11064-020-03041-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 04/18/2020] [Accepted: 04/25/2020] [Indexed: 12/16/2022]
Abstract
Type 2 diabetes (T2D) is associated with cognitive decline and dementia. Both neurodegenerative conditions are characterized by olfactory dysfunction (OD) which is also observed in diabetic patients. Diabetes and neurodegeneration display altered miRNAs expression; therefore, the study of miRNAs in the diabetic olfactory system is important in order to know the mechanisms involved in neurodegeneration induced by T2D. In this work we evaluated the expression of miRs206, 451, 146a and 34a in the olfactory bulb (OB) of T2D rats and its association with OD. T2D induction was performed by administering streptozotocin to neonatal rats. The olfactory function was evaluated after reaching the adulthood by employing the buried pellet and social recognition tests. After 18 weeks, animals were sacrificed to determinate miRNAs and protein expression in the OB. T2D animals showed a significant increase in the latency to find the odor stimulus in the buried pellet test and a significant reduction in the interest to investigate the novel juvenile subjects in the social recognition test, indicating OD. In miRNAs analysis we observed a significant increase of miR-146a expression in the OB of T2D rats when compared to controls. This increase in miR-146a correlated with the overexpression of IL-1β in the OB of T2D rats. The present results showed that OD in T2D rats is associated with IL-1β mediated-inflammation and miR-146a overexpression, suggesting that high levels of IL-1β could trigger miR-146a upregulation as a negative feedback of the inflammatory response in the OB of T2D rats.
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Affiliation(s)
- Adriana Jiménez
- Departamento de Fisiología, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Diana Organista-Juárez
- Departamento de Fisiología, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Areli Torres-Castro
- Departamento de Fisiología, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México.,, IMSS Hospital General Regional 1 Dr. Carlos Mac Gregor Sánchez Navarro, Ciudad de México, México
| | - Mara A Guzmán-Ruíz
- Departamento de Fisiología, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Enrique Estudillo
- Laboratorio de Reprogramación Celular IFC/UNAM, Instituto Nacional de Neurología y Neurocirugía "Manuel Velasco Suárez,", Ciudad de México, México
| | - Rosalinda Guevara-Guzmán
- Departamento de Fisiología, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, México.
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Zhai B, Zhang L, Wang C, Zhao Z, Zhang M, Li X. Identification of microRNA-21 target genes associated with hair follicle development in sheep. PeerJ 2019; 7:e7167. [PMID: 31293827 PMCID: PMC6599667 DOI: 10.7717/peerj.7167] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Accepted: 05/22/2019] [Indexed: 01/20/2023] Open
Abstract
Aim The target molecule regulatory function of microRNA-21 (miR-21) in multiple signalling pathways has become a main focus of genetic and pharmacological regulatory studies of various diseases. The identification of target genes for miRNA-21 in the development of hair follicles can provide new research pathways for the regulation of cell development. Methods In the present study, eight six-month-old ewes from Super Merino (SM) and Small Tailed Han (STH) sheep breeds were selected. Target prediction and dual-luciferase wild-type and mutant vectors were used to identify the target genes of miR-21. Quantitative reverse transcription polymerase chain reaction (RT-qPCR) and bioinformatics analysis were conducted to analyze the effects of miR-21. Results The results show that the expressions of CNKSR2, KLF3 and TNPO1 were downregulated by miRNA-21 at rates of 36%, 26% and 48%, respectively. Moreover, there was a significant negative correlation between the expression of miR-21 and the three target genes in sheep with two extreme phenotypes. The expression of microRNA-21in October was significantly lower than that in January and February; while the expression of CNKSR2, KLF3 and TNPO1 in October was higher than that in January and February. Conclusions: These results suggest that CNKSR2, KLF3 and TNPO1 are three newly discovered target genes of miR-21 and might be involved in the effects of miR-21 on hair follicle development.
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Affiliation(s)
- Bo Zhai
- Jilin Academy of Agricultural Science, Branch of Animal Husbandry, Gongzhuling, China
| | - Lichun Zhang
- Jilin Academy of Agricultural Science, Branch of Animal Husbandry, Gongzhuling, China
| | - Chunxin Wang
- Jilin Academy of Agricultural Science, Branch of Animal Husbandry, Gongzhuling, China
| | - Zhuo Zhao
- Jilin Academy of Agricultural Science, Branch of Animal Husbandry, Gongzhuling, China
| | - Mingxin Zhang
- Jilin Academy of Agricultural Science, Branch of Animal Husbandry, Gongzhuling, China
| | - Xu Li
- Jilin Academy of Agricultural Science, Branch of Animal Husbandry, Gongzhuling, China
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Márquez-Valadez B, Valle-Bautista R, García-López G, Díaz NF, Molina-Hernández A. Maternal Diabetes and Fetal Programming Toward Neurological Diseases: Beyond Neural Tube Defects. Front Endocrinol (Lausanne) 2018; 9:664. [PMID: 30483218 PMCID: PMC6243582 DOI: 10.3389/fendo.2018.00664] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 10/25/2018] [Indexed: 12/20/2022] Open
Abstract
The purpose of this review was to search for experimental or clinical evidence on the effect of hyperglycemia in fetal programming to neurological diseases, excluding evident neural tube defects. The lack of timely diagnosis and the inadequate control of diabetes during pregnancy have been related with postnatal obesity, low intellectual and verbal coefficients, language and motor deficits, attention deficit with hyperactivity, problems in psychosocial development, and an increased predisposition to autism and schizophrenia. It has been proposed that several childhood or adulthood diseases have their origin during fetal development through a phenomenon called fetal programming. However, not all the relationships between the outcomes mentioned above and diabetes during gestation are clear, well-studied, or have been related to fetal programming. To understand this relationship, it is imperative to understand how developmental processes take place in health, in order to understand how the functional cytoarchitecture of the central nervous system takes place; to identify changes prompted by hyperglycemia, and to correlate them with the above postnatal impaired functions. Although changes in the establishment of patterns during central nervous system fetal development are related to a wide variety of neurological pathologies, the mechanism by which several maternal conditions promote fetal alterations that contribute to impaired neural development with postnatal consequences are not clear. Animal models have been extremely useful in studying the effect of maternal pathologies on embryo and fetal development, since obtaining central nervous system tissue in humans with normal appearance during fetal development is an important limitation. This review explores the state of the art on this topic, to help establish the way forward in the study of fetal programming under hyperglycemia and its impact on neurological and psychiatric disorders.
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Affiliation(s)
- Berenice Márquez-Valadez
- Department of Physiology and Cell Development, Instituto Nacional de Perinatología Isidro Espinosa de los Reyes, Mexico City, Mexico
- Department of Physiology, Biophysics and Neurosciences, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico City, Mexico
| | - Rocío Valle-Bautista
- Department of Physiology and Cell Development, Instituto Nacional de Perinatología Isidro Espinosa de los Reyes, Mexico City, Mexico
- Department of Physiology, Biophysics and Neurosciences, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico City, Mexico
| | - Guadalupe García-López
- Department of Physiology and Cell Development, Instituto Nacional de Perinatología Isidro Espinosa de los Reyes, Mexico City, Mexico
| | - Néstor Fabián Díaz
- Department of Physiology and Cell Development, Instituto Nacional de Perinatología Isidro Espinosa de los Reyes, Mexico City, Mexico
| | - Anayansi Molina-Hernández
- Department of Physiology and Cell Development, Instituto Nacional de Perinatología Isidro Espinosa de los Reyes, Mexico City, Mexico
- *Correspondence: Anayansi Molina-Hernández
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Ramya S, Shyamasundar S, Bay BH, Dheen ST. Maternal Diabetes Alters Expression of MicroRNAs that Regulate Genes Critical for Neural Tube Development. Front Mol Neurosci 2017; 10:237. [PMID: 28798665 PMCID: PMC5531003 DOI: 10.3389/fnmol.2017.00237] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2017] [Accepted: 07/11/2017] [Indexed: 11/13/2022] Open
Abstract
Maternal diabetes is known to cause neural tube defects (NTDs) in embryos and neuropsychological deficits in infants. Several metabolic pathways and a plethora of genes have been identified to be deregulated in developing brain of embryos by maternal diabetes, although the exact mechanism remains unknown. Recently, miRNAs have been shown to regulate genes involved in brain development and maturation. Therefore, we hypothesized that maternal diabetes alters the expression of miRNAs that regulate genes involved in biological pathways critical for neural tube development and closure during embryogenesis. To address this, high throughput miRNA expression profiling in neural stem cells (NSCs) isolated from the forebrain of embryos from normal or streptozotocin-induced diabetic pregnancy was carried out. It is known that maternal diabetes results in fetal hypoglycemia/hyperglycemia or hypoxia. Hence, NSCs from embryos of control pregnant mice were exposed to low or high glucose or hypoxia in vitro. miRNA pathway analysis revealed distinct deregulation of several biological pathways, including axon guidance pathway, which are critical for brain development in NSCs exposed to different treatments. Among the differentially expressed miRNAs, the miRNA-30 family members which are predicted to target genes involved in brain development was upregulated in NSCs from embryos of diabetic pregnancy when compared to control. miRNA-30b was found to be upregulated while its target gene Sirtuin 1 (Sirt1), as revealed by luciferase assay, was down regulated in NSCs from embryos of diabetic pregnancy. Further, overexpression of miRNA-30b in NSCs, resulted in decreased expression of Sirt1 protein, and altered the neuron/glia ratio. On the other hand, siRNA mediated knockdown of Sirt1 in NSCs promoted astrogenesis, indicating that miRNA-30b alters lineage specification via Sirt1. Overall, these results suggest that maternal diabetes alters the genes involved in neural tube formation via regulating miRNAs.
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Affiliation(s)
| | | | | | - S. Thameem Dheen
- Department of Anatomy, Yong Loo Lin School of Medicine, National University Health System, National University of SingaporeSingapore, Singapore
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Li Z, Lan Y, Zhao K, Lv X, Ding N, Lu H, Zhang J, Yue H, Shi J, Song D, Gao F, He W. miR-142-5p Disrupts Neuronal Morphogenesis Underlying Porcine Hemagglutinating Encephalomyelitis Virus Infection by Targeting Ulk1. Front Cell Infect Microbiol 2017; 7:155. [PMID: 28516065 PMCID: PMC5413507 DOI: 10.3389/fcimb.2017.00155] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2017] [Accepted: 04/12/2017] [Indexed: 12/17/2022] Open
Abstract
Porcine hemagglutinating encephalomyelitis virus (PHEV) invades the central nervous system (CNS) and causes neurodegenerative disease in suckling piglets, but the understanding of its neuropathogenicity for neurological dysfunction remains limited. Here, we report that miR-142-5p is localized to neurons and negatively regulates neuronal morphogenesis in porcine hemagglutinating encephalomyelitis (PHE). This phenotype was mediated by miR-142-5p inhibition of an mRNA encoding unc-51-like-kinase1 (Ulk1), which controls axon outgrowth and dendrite formation. Modulating miR-142-5p activity by microRNA mimics or inhibitors induced neurodegeneration, including stunted axon elongation, unstable dendritic spine formation, and irregular swelling and disconnection in neurites. Relieving Ulk1 mRNA repression in primary cortical neurons by miR-142-5p antagomirs or replication-deficient adenoviruses encoding Ulk1 (Ad5-Ulk1), which improved rescue of nerve injury, restricted viral replication, and increased survival rate in mice underlying PHEV infection. In contrast, disrupting Ulk1 in RNAi-expressing neurons mostly led to significantly shortened axon elongation and/or an abnormally large number of branched dendrites. Taken together, we demonstrated that the abnormal neuronal morphogenesis underlying PHEV infection was mainly caused by functional mRNA repression of the miR-142-5p target Ulk1. Our data revealed that PHEV adapted to use spatiotemporal control of host microRNAs to invade CNS, and provided new insights into the virus-associated neurological dysfunction microenvironment.
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Affiliation(s)
- Zi Li
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin UniversityChangchun, China
| | - Yungang Lan
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin UniversityChangchun, China
| | - Kui Zhao
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin UniversityChangchun, China
| | - Xiaoling Lv
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin UniversityChangchun, China
| | - Ning Ding
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin UniversityChangchun, China
| | - Huijun Lu
- Key Laboratory of Zoonosis, Ministry of Education, Institute of Zoonosis, Jilin UniversityChangchun, China
| | - Jing Zhang
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin UniversityChangchun, China
| | - Huiqing Yue
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin UniversityChangchun, China
| | - Junchao Shi
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin UniversityChangchun, China
| | - Deguang Song
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin UniversityChangchun, China
| | - Feng Gao
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin UniversityChangchun, China
| | - Wenqi He
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin UniversityChangchun, China
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Deregulation of miRNA-181c potentially contributes to the pathogenesis of AD by targeting collapsin response mediator protein 2 in mice. J Neurol Sci 2016; 367:3-10. [DOI: 10.1016/j.jns.2016.05.038] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 05/05/2016] [Accepted: 05/18/2016] [Indexed: 12/26/2022]
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Sun T, Li W, Ling S. miR-30c and semaphorin 3A determine adult neurogenesis by regulating proliferation and differentiation of stem cells in the subventricular zones of mouse. Cell Prolif 2016; 49:270-80. [PMID: 27198082 DOI: 10.1111/cpr.12261] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 03/31/2016] [Indexed: 12/11/2022] Open
Abstract
OBJECTIVES Mechanisms that regulate proliferation of adult neural stem cells are largely unknown. Here, we have investigated the role of microR-30c (miR-30c) and its target, semaphoring 3A (sema3A), in regulating adult neurogenesis and mechanisms underlying this process. MATERIALS AND METHODS In situ hybridization, immunofluorescence and quantitative real-time PCR were used to assess complementary expression patterns of miR-30c and sema3A in mice. Effects of miR-30c in the subventricular zone (SVZ) were examined by stereotaxic injection of up- and down-regulating lentiviruses. 5'-bromo-2'-deoxyuridine labelling was performed to investigate effects of miR-30c and sema3A on adult neurogenesis. Real-time cell assays, morphological analysis and cell cycle measurements were used to reveal the mechanisms by which miR-30c and sema3A regulate adult neurogenesis. RESULTS Expression of miR-30c negatively correlated with that of sema3A in neurons, and levels of miR-30c and sema3A correlated positively with numbers of newborn cells in the SVZ and rostral migration stream. miR-30c and sema3A affected adult neurogenesis by regulating proliferation and differentiation, as well as cycles of stem cells in the SVZ. CONCLUSIONS miR-30c and sema3A regulate adult neurogenesis by controlling proliferation and differentiation of stem cells in the SVZ. This finding reveals a novel regulatory mechanism of adult neurogenesis.
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Affiliation(s)
- Tingting Sun
- Institute of Neuroscience and Anatomy, Zhejiang University, School of Medicine, Hangzhou, 310058, China
| | - Weiyun Li
- Institute of Neuroscience and Anatomy, Zhejiang University, School of Medicine, Hangzhou, 310058, China
| | - Shucai Ling
- Institute of Neuroscience and Anatomy, Zhejiang University, School of Medicine, Hangzhou, 310058, China
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Sun T, Li W, Li T, Ling S. microRNA Profiling of Amniotic Fluid: Evidence of Synergy of microRNAs in Fetal Development. PLoS One 2016; 11:e0153950. [PMID: 27166676 PMCID: PMC4864075 DOI: 10.1371/journal.pone.0153950] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Accepted: 04/06/2016] [Indexed: 11/18/2022] Open
Abstract
Amniotic fluid (AF) continuously exchanges molecules with the fetus, playing critical roles in fetal development especially via its complex components. Among these components, microRNAs are thought to be transferred between cells loaded in microvesicles. However, the functions of AF microRNAs remain unknown. To date, few studies have examined microRNAs in amniotic fluid. In this study, we employed miRCURY Locked Nucleotide Acid arrays to profile the dynamic expression of microRNAs in AF from mice on embryonic days E13, E15, and E17. At these times, 233 microRNAs were differentially expressed (p< 0.01), accounting for 23% of the total Mus musculus microRNAs. These differentially-expressed microRNAs were divided into two distinct groups based on their expression patterns. Gene ontology analysis showed that the intersectional target genes of these differentially-expressed microRNAs were mainly distributed in synapse, synaptosome, cell projection, and cytoskeleton. Pathway analysis revealed that the target genes of the two groups of microRNAs were synergistically enriched in axon guidance, focal adhesion, and MAPK signaling pathways. MicroRNA-mRNA network analysis and gene- mapping showed that these microRNAs synergistically regulated cell motility, cell proliferation and differentiation, and especially the axon guidance process. Cancer pathways associated with growth and proliferation were also enriched in AF. Taken together, the results of this study are the first to show the functions of microRNAs in AF during fetal development, providing novel insights into interpreting the roles of AF microRNAs in fetal development.
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Affiliation(s)
- Tingting Sun
- Institute of Neuroscience and Anatomy, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Weiyun Li
- Institute of Neuroscience and Anatomy, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Tianpeng Li
- College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Shucai Ling
- Institute of Neuroscience and Anatomy, Zhejiang University School of Medicine, Hangzhou, 310058, China
- * E-mail:
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10
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Sun T, Li T, Davies H, Li W, Yang J, Li S, Ling S. Altered Morphologies and Functions of the Olfactory Bulb and Hippocampus Induced by miR-30c. Front Neurosci 2016; 10:207. [PMID: 27242411 PMCID: PMC4860400 DOI: 10.3389/fnins.2016.00207] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Accepted: 04/25/2016] [Indexed: 11/17/2022] Open
Abstract
Adult neurogenesis is considered to contribute to a certain degree of plasticity for the brain. However, the effects of adult-born neurons on the brain are still largely unknown. Here, we specifically altered the expression of miR-30c in the subventricular zone (SVZ) and dentate gyrus (DG) by stereotaxic injection with their respective up- and down-regulated lentiviruses. Results showed an increased level of miR-30c enhanced adult neurogenesis by prompting cell-cycles of stem cells, whereas down-regulated miR-30c led to the opposite results. When these effects of miR-30c lasted for 3 months, we detected significant morphological changes in the olfactory bulb (OB) and lineage alteration in the hippocampus. Tests of olfactory sensitivity and associative and spatial memory showed that a certain amount of adult-born neurons are essential for the normal functions of the OB and hippocampus, but there also exist redundant newborn neurons that do not further improve the functioning of these areas. Our study revealed the interactions between miRNA, adult neurogenesis, brain morphology and function, and this provides a novel insight into understanding the role of newborn neurons in the adult brain.
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Affiliation(s)
- Tingting Sun
- Institute of Neuroscience and Anatomy, Zhejiang University School of Medicine Hangzhou, China
| | - Tianpeng Li
- College of Environment Science and Engineering, Donghua University Shanghai, China
| | - Henry Davies
- Institute of Neuroscience, Zhejiang University School of Medicine Hangzhou, China
| | - Weiyun Li
- Institute of Neuroscience and Anatomy, Zhejiang University School of Medicine Hangzhou, China
| | - Jing Yang
- Institute of Neuroscience and Anatomy, Zhejiang University School of Medicine Hangzhou, China
| | - Shanshan Li
- Institute of Neuroscience and Anatomy, Zhejiang University School of Medicine Hangzhou, China
| | - Shucai Ling
- Institute of Neuroscience and Anatomy, Zhejiang University School of Medicine Hangzhou, China
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Luu BE, Storey KB. Dehydration triggers differential microRNA expression in Xenopus laevis brain. Gene 2015; 573:64-9. [DOI: 10.1016/j.gene.2015.07.027] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 06/23/2015] [Accepted: 07/09/2015] [Indexed: 12/17/2022]
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