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https://www.readbyqxmd.com/read/28077877/integration-of-temporal-and-spatial-patterning-generates-neural-diversity
#1
Ted Erclik, Xin Li, Maximilien Courgeon, Claire Bertet, Zhenqing Chen, Ryan Baumert, June Ng, Clara Koo, Urfa Arain, Rudy Behnia, Alberto Del Valle Rodriguez, Lionel Senderowicz, Nicolas Negre, Kevin P White, Claude Desplan
In the Drosophila optic lobes, 800 retinotopically organized columns in the medulla act as functional units for processing visual information. The medulla contains over 80 types of neuron, which belong to two classes: uni-columnar neurons have a stoichiometry of one per column, while multi-columnar neurons contact multiple columns. Here we show that combinatorial inputs from temporal and spatial axes generate this neuronal diversity: all neuroblasts switch fates over time to produce different neurons; the neuroepithelium that generates neuroblasts is also subdivided into six compartments by the expression of specific factors...
January 11, 2017: Nature
https://www.readbyqxmd.com/read/28076568/immunohistochemical-analysis-of-retinoblastoma-cell-phenotype-using-neuronal-and-glial-cell-markers
#2
María Eugenia Orellana, Rubens Belfort, Emilia Antecka, Miguel Noel Burnier
Purpose: The cellular origin of retinoblastoma is uncertain as constituent tumor cells heterogeneously express markers of both immature and mature retinal cells. An immunohistochemical analysis of cellular origin may yield valuable insights into disease progression and treatment options. This study aimed to determine the cellular origin of retinoblastoma in a large case series and correlate these findings with histopathological prognostic factors. Methods: Thirty-nine retinoblastoma cases were histopathologically diagnosed and analyzed by immunohistochemistry using monoclonal antibodies against the immature neural cell marker SRY-box containing gene 2 (SOX-2), the mature neuronal cell marker microtubule-associated protein 2 (MAP2), and the mature glial cell marker glial fibrillary acidic protein (GFAP)...
November 2016: Arquivos Brasileiros de Oftalmologia
https://www.readbyqxmd.com/read/28065310/analysis-of-postcytokinetic-roles-of-cytokinetic-components-in-caenorhabditis-elegans
#3
Y Chai, D Tian, W Li, G Ou
Cytokinesis requires the interplay between the cytoskeleton and plasma membrane. Emerging evidence indicates that some cytokinetic components are essential for the postcytokinetic events such as epithelium organization and neural development. We have recently developed live cell imaging and conditional knockout techniques to visualize cytokinetic proteins in Caenorhabditis elegans Q neuroblasts and separate their postcytokinetic functions from cytokinetic ones. Here we describe how the fluorescent reporter strains and conditional knockout C...
2017: Methods in Cell Biology
https://www.readbyqxmd.com/read/28060319/isolation-and-culture-of-adult-neural-stem-cells-from-the-mouse-subcallosal-zone
#4
Joo Yeon Kim, Ju-Hyun Lee, Woong Sun
Adult neural stem cells (aNSCs) can be used for the regeneration of damaged brain tissue. NSCs have the potential for differentiation and proliferation into three types of cells: neurons, astrocytes, and oligodendrocytes. Identifying aNSC-derived regions and characterizing the aNSC properties are critical for the potential use of aNSCs and for the elucidation of their role in neural regeneration. The subcallosal zone (SCZ), located between white matter and the hippocampus, has recently been reported to contain aNSCs and continuously give rise to neuroblasts...
December 15, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28053616/sirtuin-2-inhibition-affects-hippocampal-functions-and-sodium-butyrate-ameliorates-the-reduction-in-novel-object-memory-cell-proliferation-and-neuroblast-differentiation
#5
Hyo Young Jung, Dae Young Yoo, Jong Whi Kim, Dae Won Kim, Jung Hoon Choi, Jin Young Chung, Moo-Ho Won, Yeo Sung Yoon, In Koo Hwang
We investigated the effects of the sirtuin-2 (SIRT2) inhibitor AK-7 on novel object memory, cell proliferation, and neuroblast differentiation in the dentate gyrus. In addition, we also observed the relationships with sodium butyrate, a histone deacetylase inhibitor, on the hippocampal functions. To investigate the effects of AK-7 on hippocampal functions, 10-week-old C57BL/6 mice were daily injected intraperitoneally with 20 mg/kg AK-7 alone or in combination with subcutaneous administration of 300 mg/kg sodium butyrate, a histone deacetylase inhibitor, for 21 days...
December 2016: Laboratory Animal Research
https://www.readbyqxmd.com/read/28051766/distribution-of-neurosensory-progenitor-pools-during-inner-ear-morphogenesis-unveiled-by-cell-lineage-reconstruction
#6
Sylvia Dyballa, Thierry Savy, Philipp Germann, Karol Mikula, Mariana Remesikova, Róbert Špir, Andrea Zecca, Nadine Peyriéras, Cristina Pujades
Reconstructing the lineage of cells is central to understanding how the wide diversity of cell types develops. Here, we provide the neurosensory lineage reconstruction of a complex sensory organ, the inner ear, by imaging zebrafish embryos in vivo over an extended timespan, combining cell tracing and cell fate marker expression over time. We deliver the first dynamic map of early neuronal and sensory progenitor pools in the whole otic vesicle. It highlights the remodeling of the neuronal progenitor domain upon neuroblast delamination, and reveals that the order and place of neuroblasts' delamination from the otic epithelium prefigure their position within the SAG...
January 4, 2017: ELife
https://www.readbyqxmd.com/read/28045430/administration-of-zinc-plus-cyclo-his-pro-increases-hippocampal-neurogenesis-in-rats-during-the-early-phase-of-streptozotocin-induced-diabetes
#7
Bo Young Choi, In Yeol Kim, Jin Hee Kim, Bo Eun Lee, Song Hee Lee, A Ra Kho, Min Sohn, Sang Won Suh
The effects of zinc supplementation on hippocampal neurogenesis in diabetes mellitus have not been studied. Herein, we investigated the effects of zinc plus cyclo-(His-Pro) (ZC) on neurogenesis occurring in the subgranular zone of dentate gyrus after streptozotocin (STZ)-induced diabetes. ZC (27 mg/kg) was administered by gavage once daily for one or six weeks from the third day after the STZ injection, and histological evaluation was performed at 10 (early phase) or 45 (late phase) days after STZ injection...
January 1, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28010765/uv-irradiated-parylene-surfaces-for-proliferation-and-differentiation-of-pc-12-cells
#8
Usman Liaqat, Hyuk Ko, Hwal Suh, Misu Lee, Jae-Chul Pyun
PC-12 cells originate from neuroblastic cells, which have an ability to differentiate into neuronlike cells. In this work, the purpose was to estimate the influence of microenvironments on cell attachment and neuritogenesis capacity of PC-12 cells on parylene-N and parylene-C films with and without ultraviolet (UV) light treatment. The estimate of total cell number after incubation for 72h, the ratio of adherent to suspended cells, counting of neurite outgrowths on parylene-N or parylene-C films after UV exposure suggested that these films were suitable for proliferation as well as differentiation of PC-12 cells...
February 2017: Enzyme and Microbial Technology
https://www.readbyqxmd.com/read/28007584/neurogenesis-upregulation-on-the-healthy-hemisphere-after-stroke-enhances-compensation-for-age-dependent-decrease-of-basal-neurogenesis
#9
Joanna Adamczak, Markus Aswendt, Christina Kreutzer, Peter Rotheneichner, Adrien Riou, Marion Selt, Andreas Beyrau, Ulla Uhlenküken, Michael Diedenhofen, Melanie Nelles, Ludwig Aigner, Sebastien Couillard-Despres, Mathias Hoehn
Stroke is a leading cause of death and disability worldwide with no treatment for the chronic phase available. Interestingly, an endogenous repair program comprising inflammation and neurogenesis is known to modulate stroke outcome. Several studies have shown that neurogenesis decreases with age but the therapeutic importance of endogenous neurogenesis for recovery from cerebral diseases has been indicated as its ablation leads to stroke aggravation and worsened outcome. A detailed characterization of the neurogenic response after stroke related to ageing would help to develop novel and targeted therapies...
December 20, 2016: Neurobiology of Disease
https://www.readbyqxmd.com/read/27990597/ultrasound-guided-core-needle-biopsy-in-the-diagnosis-of-neuroblastic-tumors-in-children-a-retrospective-study-on-83-cases
#10
Lihui Zhao, Jie Mu, Ping Du, Hailing Wang, Yiran Mao, Yong Xu, Xiaojie Xin, Fenglin Zang
AIM: Ultrasound-guided biopsy technique with the large-core needle has widely been applied in the diagnosis of adult abdominopelvic cavity, thyroid, and neck tumors. There are few reports on ultrasound-guided biopsy using large-core needle in pediatric abdominopelvic cavity tumors. This study was to evaluate the ultrasound features and the diagnostic value of ultrasound-guided core needle biopsy for pediatric neuroblastic tumors. METHODS: The pediatric patients with neuroblastic tumor that underwent ultrasound examination and ultrasound-guided core needle biopsy from January 2009 to November 2015 were reviewed...
December 18, 2016: Pediatric Surgery International
https://www.readbyqxmd.com/read/27987784/a-novel-l-leucine-modified-sol-gel-carbon-electrode-for-simultaneous-electrochemical-detection-of-homovanillic-acid-dopamine-and-uric-acid-in-neuroblastoma-diagnosis
#11
Redouan El Khamlichi, Dounia Bouchta, El Hassane Anouar, Mounia Ben Atia, Aisha Attar, Mohamed Choukairi, Saloua Tazi, Raissouni Ihssane, Chaoukat Faiza, Draoui Khalid, Riffi Temsamani Khalid
Neuroblastoma is a pediatric neuroblastic tumor arising in the sympathetic nervous crest cells. A high grade of Neuroblastoma is characterized by a high urinary excretion of homovanillic acid and dopamine. In this work l-leucine modified Sol-Gel-Carbon electrode was used for a sensitive voltammetric determination of homovanillic acid and dopamine in urine. The electrochemical response characteristics were investigated by cyclic and differential pulse voltammetry; the modified electrode has shown an increase in the effective area of up to 40%, a well-separated oxidation peaks and an excellent electrocatalytic activity...
February 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/27984122/diagnostic-utility-of-cyclin-d1-in-the-diagnosis-of-small-round-blue-cell-tumors-in-children-and-adolescents
#12
Gaetano Magro, Lucia Salvatorelli, Rita Alaggio, Velia D'Agata, Ferdinando Nicoletti, Andrea Di Cataldo, Rosalba Parenti
Small round blue cell tumors (SRBCTs) of children and adolescents are often diagnostically challenging lesions. With the increasing diagnostic approach based on small biopsies, there is the need of specific immunomarkers that can help in the differential diagnosis among the different tumor histotypes to assure the patient a correct diagnosis for proper treatment. Based on our recent studies showing cyclin D1 overexpression in both Ewing's sarcoma/primitive peripheral neuroectodermal tumor (EWS/pPNET) and peripheral neuroblastic tumors (neuroblastoma and ganglioneuroblastoma), we immunohistochemically assessed cyclin D1 immunoreactivity in 128 cases of SRBCTs in children and adolescents in order to establish its potential utility in the differential diagnosis...
October 27, 2016: Human Pathology
https://www.readbyqxmd.com/read/27974623/genetic-regulation-and-function-of-epidermal-growth-factor-receptor-signalling-in-patterning-of-the-embryonic-drosophila-brain
#13
David Jussen, Janina von Hilchen, Rolf Urbach
The specification of distinct neural cell types in central nervous system development crucially depends on positional cues conferred to neural stem cells in the neuroectoderm. Here, we investigate the regulation and function of the epidermal growth factor receptor (EGFR) signalling pathway in early development of the Drosophila brain. We find that localized EGFR signalling in the brain neuroectoderm relies on a neuromere-specific deployment of activating (Spitz, Vein) and inhibiting (Argos) ligands. Activated EGFR controls the spatially restricted expression of all dorsoventral (DV) patterning genes in a gene- and neuromere-specific manner...
December 2016: Open Biology
https://www.readbyqxmd.com/read/27938488/a-subpopulation-of-dopaminergic-neurons-co-expresses-serotonin-in-ventral-mesencephalic-cultures-but-not-after-intrastriatal-transplantation-in-a-rat-model-of-parkinsons-disease
#14
Stefano Di Santo, Stefanie Seiler, Angélique Ducray, Morten Meyer, Hans Widmer
Cell replacement therapy is a promising avenue into the investigation and treatment of Parkinson’s disease (PD) and in some cases significant long-term motor improvements have been demonstrated. The main source of donor tissue is the human fetal ventral mesencephalon (VM), which consists of a mixed neuronal population and its heterogeneity likely contributes to the inconsistent outcome observed in clinical trials. Detailed knowledge about the neuronal subpopulations in the VM seems, hence, essential for successful cell transplantation...
7, 2016: Cell Transplantation
https://www.readbyqxmd.com/read/27932973/decline-in-proliferation-and-immature-neuron-markers-in-the-human-subependymal-zone-during-aging-relationship-to-egf-and-fgf-related-transcripts
#15
Christin Weissleder, Samantha J Fung, Matthew W Wong, Guy Barry, Kay L Double, Glenda M Halliday, Maree J Webster, Cynthia Shannon Weickert
Neuroblasts exist within the human subependymal zone (SEZ); however, it is debated to what extent neurogenesis changes during normal aging. It is also unknown how precursor proliferation may correlate with the generation of neuronal and glial cells or how expression of growth factors and receptors may change throughout the adult lifespan. We found evidence of dividing cells in the human SEZ (n D 50) in conjunction with a dramatic age-related decline (21-103 years) of mRNAs indicative of proliferating cells (Ki67) and immature neurons (doublecortin)...
2016: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/27931508/voluntary-wheel-running-reverses-the-decrease-in-subventricular-zone-neurogenesis-caused-by-corticosterone
#16
Jada Chia-Di Lee, Suk-Yu Yau, Tatia M C Lee, Benson Wui-Man Lau, Kwok-Fai So
Adult neurogenesis within the dentate gyrus (DG) of the hippocampus can be increased by voluntary exercise but is suppressed under stress, such as with corticosterone (CORT). However, the effects of exercise and CORT on the cell proliferation of the other traditional neurogenic site, the subventricular zone (SVZ), have been reported with controversial results. In addition, the cotreatment effects of voluntary exercise and CORT have not been investigated. This study aims to determine whether CORT can suppress cell proliferation in the SVZ and whether this can be reversed by voluntary exercise...
November 2016: Cell Transplantation
https://www.readbyqxmd.com/read/27930914/a-high-fat-diet-induced-decrease-in-hippocampal-newly-born-neurons-of-male-mice-is-exacerbated-by-mild-psychological-stress-using-a-communication-box
#17
Yusuke Murata, Yukiyasu Narisawa, Rima Shimono, Hiraku Ohmori, Masayoshi Mori, Kenji Ohe, Kazunori Mine, Munechika Enjoji
BACKGROUND: Obese persons have a higher incidence of depression than healthy-weight persons. Several studies indicated that the exposure to a high fat diet (HFD) results in a decrease in hippocampal neurogenesis, which leads to higher stress response and stress-induced depression. Although stress is a risk factor for obesity and depression, no studies to date have investigated the effect of stress on the hippocampal neurogenesis of HFD-induced obese animals. The aim of this study was to elucidate whether or not obese HFD-fed mice are vulnerable to stress-induced depression by investigating hippocampal neurogenesis...
February 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/27925861/modeling-heavy-ion-impairment-of-hippocampal-neurogenesis-after-acute-and-fractionated-irradiation
#18
Eliedonna Cacao, Francis A Cucinotta
Radiation-induced impairment of neurogenesis in the hippocampal dentate gyrus is a concern due to its reported association with cognitive detriments after radiotherapy for brain cancers and the possible risks to astronauts chronically exposed to space radiation. Here, we have extended our recent work in a mouse model of impaired neurogenesis after exposure to low-linear energy transfer (LET) radiation to heavy ion irradiation. To our knowledge, this is the first report of a predictive mathematical model of radiation-induced changes to neurogenesis for a variety of radiation types after acute or fractionated irradiation...
December 2016: Radiation Research
https://www.readbyqxmd.com/read/27917473/maternal-deprivation-alters-expression-of-neural-maturation-gene-tbr1-in-the-amygdala-paralaminar-nucleus-in-infant-female-macaques
#19
Danielle M de Campo, Judy L Cameron, Joseph M Miano, David A Lewis, Karoly Mirnics, Julie L Fudge
Early parental loss is associated with social-emotional dysregulation and amygdala physiologic changes. Previously, we examined whole amygdala gene expression in infant monkeys exposed to early maternal deprivation. Here, we focus on an amygdala region with immature neurons at birth: the paralaminar nucleus (PL). We hypothesized that 1) the normal infant PL is enriched in a subset of neural maturation (NM) genes compared to a nearby amygdala subregion; and 2) maternal deprivation would downregulate expression of NM transcripts (mRNA)...
December 4, 2016: Developmental Psychobiology
https://www.readbyqxmd.com/read/27913619/the-caenorhabditis-elegans-nf2-merlin-molecule-nfm-1-non-autonomously-regulates-neuroblast-migration-and-interacts-genetically-with-the-guidance-cue-slt-1-slit
#20
Matthew P Josephson, Rana Aliani, Megan L Norris, Matthew E Ochs, Mahekta Gujar, Erik A Lundquist
During nervous system development, neurons and their progenitors migrate to their final destinations. In Caenorhabditis elegans, the bilateral Q neuroblasts and their descendants migrate long distances in opposite directions, despite being born in the same posterior region. QR on the right migrates anteriorly and generates the AQR neuron positioned near the head, and QL on the left migrates posteriorly, giving rise to the PQR neuron positioned near the tail. In a screen for genes required for AQR and PQR migration, we identified an allele of nfm-1, which encodes a molecule similar to vertebrate NF2/Merlin, an important tumor suppressor in humans...
December 2, 2016: Genetics
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