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https://www.readbyqxmd.com/read/28223921/epigenetic-modulation-of-stem-cells-in-neurodevelopment-the-role-of-methylation-and-acetylation
#1
REVIEW
Martyna Podobinska, Ilona Szablowska-Gadomska, Justyna Augustyniak, Ioanna Sandvig, Axel Sandvig, Leonora Buzanska
The coordinated development of the nervous system requires fidelity in the expression of specific genes determining the different neural cell phenotypes. Stem cell fate decisions during neurodevelopment are strictly correlated with their epigenetic status. The epigenetic regulatory processes, such as DNA methylation and histone modifications discussed in this review article, may impact both neural stem cell (NSC) self-renewal and differentiation and thus play an important role in neurodevelopment. At the same time, stem cell decisions regarding fate commitment and differentiation are highly dependent on the temporospatial expression of specific genes contingent on the developmental stage of the nervous system...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28222332/acquisition-of-vowel-articulation-in-childhood-investigated-by-acoustic-to-articulatory-inversion
#2
Hiroki Oohashi, Hama Watanabe, Gentaro Taga
While the acoustical features of speech sounds in children have been extensively studied, limited information is available as to their articulation during speech production. Instead of directly measuring articulatory movements, this study used an acoustic-to-articulatory inversion model with scalable vocal tract size to estimate developmental changes in articulatory state during vowel production. Using a pseudo-inverse Jacobian matrix of a model mapping seven articulatory parameters to acoustic ones, the formant frequencies of each vowel produced by three Japanese children over time at ages between 6 and 60 months were transformed into articulatory parameters...
February 18, 2017: Infant Behavior & Development
https://www.readbyqxmd.com/read/28220482/morphological-interaction-between-the-nasal-septum-and-nasofacial-skeleton-during-human-ontogeny
#3
Matthew J Goergen, Nathan E Holton, Thorsten Grünheid
The nasal septal cartilage is thought to be a key growth center that contributes to nasofacial skeletal development. Despite the developmental influence of the nasal septum however, humans often exhibit a high frequency of septal deviation suggesting discordance in the growth between the septum and surrounding nasofacial skeleton. While there are numerous etiological factors that contribute to septal deviation, the surrounding nasofacial skeleton may also act to constrain the septum, resulting in altered patterns of growth...
February 20, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28220062/anatomical-and-molecular-properties-of-long-descending-propriospinal-neurons-in-mice
#4
Jamie R Flynn, Victoria L Conn, Kieran A Boyle, David I Hughes, Masahiko Watanabe, Tomoko Velasquez, Martyn D Goulding, Robert J Callister, Brett A Graham
Long descending propriospinal neurons (LDPNs) are interneurons that form direct connections between cervical and lumbar spinal circuits. LDPNs are involved in interlimb coordination and are important mediators of functional recovery after spinal cord injury (SCI). Much of what we know about LDPNs comes from a range of species, however, the increased use of transgenic mouse lines to better define neuronal populations calls for a more complete characterisation of LDPNs in mice. In this study, we examined the cell body location, inhibitory neurotransmitter phenotype, developmental provenance, morphology and synaptic inputs of mouse LDPNs throughout the cervical and upper thoracic spinal cord...
2017: Frontiers in Neuroanatomy
https://www.readbyqxmd.com/read/28217963/divergent-methylation-pattern-in-adult-stage-between-two-forms-of-tetranychus-urticae-koch-acari-tetranychidae
#5
Si-Xia Yang, Chao Guo, Xiu-Ting Zhao, Jing-Tao Sun, Xiao-Yue Hong
The two-spotted spider mite, Tetranychus urticae Koch has two forms: green form and red form. Understanding the molecular basis of how these two forms established without divergent genetic background is an intriguing area. As a well-known epigenetic process, DNA methylation has particularly important roles in gene regulation and developmental variation across diverse organisms that not alter genetic background. Here, to investigate whether DNA methylation could be associated with different phenotypic consequences in T...
February 19, 2017: Insect Science
https://www.readbyqxmd.com/read/28214467/paxillin-a-crossroad-in-pathological-cell-migration
#6
REVIEW
Ana María López-Colomé, Irene Lee-Rivera, Regina Benavides-Hidalgo, Edith López
Paxilllin is a multifunctional and multidomain focal adhesion adapter protein which serves an important scaffolding role at focal adhesions by recruiting structural and signaling molecules involved in cell movement and migration, when phosphorylated on specific Tyr and Ser residues. Upon integrin engagement with extracellular matrix, paxillin is phosphorylated at Tyr31, Tyr118, Ser188, and Ser190, activating numerous signaling cascades which promote cell migration, indicating that the regulation of adhesion dynamics is under the control of a complex display of signaling mechanisms...
February 18, 2017: Journal of Hematology & Oncology
https://www.readbyqxmd.com/read/28212892/atf2-a-paradigm-of-the-multifaceted-regulation-of-transcription-factors-in-biology-and-disease
#7
REVIEW
Gregory Watson, Ze'ev Ronai, Eric Lau
Stringent transcriptional regulation is crucial for normal cellular biology and organismal development. Perturbations in the proper regulation of transcription factors can result in numerous pathologies, including cancer. Thus, understanding how transcription factors are regulated and how they are dysregulated in disease states is key to the therapeutic targeting of these factors and/or the pathways that they regulate. Activating transcription factor 2 (ATF2) has been studied in a number of developmental and pathological conditions...
February 14, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28197914/sumoylation-in-development-and-differentiation
#8
Adeline F Deyrieux, Van G Wilson
Tissue morphogenesis is a fascinating aspect of both developmental biology and regeneration of certain adult organs, and timely control of cellular differentiation is a key to these processes. During development, events interrupting cellular differentiation and leading to organ failure are embryonic lethal; likewise, perturbation of differentiation in regenerating tissues leads to dysfunction and disease. At the molecular level, cellular differentiation is orchestrated by a well-coordinated cascade of transcription factors (TFs) and chromatin remodeling complexes that drive gene expression...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28197719/regulatory-crosstalk-between-micrornas-and-hormone-signalling-cascades-controls-the-variation-on-seed-dormancy-phenotype-at-arabidopsis-thaliana-seed-set
#9
Yang Liu, Yousry A El-Kassaby
We employed an Illumina sequencing approach to identify candidate microRNA cohorts that may greatly contribute to seed dormancy modulation and to construct a microRNA-gene regulatory network in hormone signalling cascades. MicroRNAs (miRNAs) are important signalling molecules and regulate many developmental programs of plants. Some miRNAs have been integrated into gene regulatory networks (GRNs) and coordinate developmental plasticity, but few study systematically investigated how phenotypical variations are regulated through differential expression of miRNA tags in GRNs during seed set...
February 14, 2017: Plant Cell Reports
https://www.readbyqxmd.com/read/28196466/the-transcriptional-landscape-of-basidiosporogenesis-in-mature-pisolithus-microcarpus-basidiocarp
#10
Maíra de Freitas Pereira, André Narvaes da Rocha Campos, Thalita Cardoso Anastacio, Emmanuelle Morin, Sérgio Hermínio Brommonschenkel, Francis Martin, Annegret Kohler, Maurício Dutra Costa
BACKGROUND: Pisolithus microcarpus (Cooke & Massee) G. Cunn is a gasteromycete that produces closed basidiocarps in symbiosis with eucalypts and acacias. The fungus produces a complex basidiocarp composed of peridioles at different developmental stages and an upper layer of basidiospores free of the hyphae and ready for wind dispersal upon the rupture of the basidiocarp pellis. During basidiosporogenesis, a process that takes place inside the basidiocarp peridioles, a conspicuous reserve of fatty acids is present throughout development...
February 14, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28195306/neural-oscillation-reveals-deficits-in-visuospatial-working-memory-in-children-with-developmental-coordination-disorder
#11
Chun-Hao Wang, Yu-Ting Tseng, Dang Liu, Chia-Liang Tsai
The electroencephalographic (EEG) oscillations associated with visuospatial working memory (VSWM) were examined in children with developmental coordination disorder (DCD; 10-11 years; N = 29) and typically developing (TD) children (10-11 years; N = 29). Behaviorally, DCD showed poorer VSWM than TD, which coincided with the diminished ability of DCD in modulating neural oscillations. Furthermore, prestimulus oscillatory alpha activity was correlated with VSWM performance. The results suggest that children with DCD might have a reduced ability to encode and recognize new information, and in particular have difficulty in maintaining task-relevant information, resulting in poorer VSWM...
February 14, 2017: Child Development
https://www.readbyqxmd.com/read/28194564/xylogenesis-in-zinnia-zinnia-elegans-cell-cultures-unravelling%C3%A2-the-regulatory-steps-in-a-complex-developmental-programmed-cell-death-event
#12
REVIEW
Elena T Iakimova, Ernst J Woltering
Physiological and molecular studies support the view that xylogenesis can largely be determined as a specific form of vacuolar programmed cell death (PCD). The studies in xylogenic zinnia cell culture have led to many breakthroughs in xylogenesis research and provided a background for investigations in other experimental models in vitro and in planta . This review discusses the most essential earlier and recent findings on the regulation of xylem elements differentiation and PCD in zinnia and other xylogenic systems...
February 13, 2017: Planta
https://www.readbyqxmd.com/read/28192873/overview-of-human-salivary-glands-highlights-of-morphology-and-developing-processes
#13
REVIEW
Fernanda de Paula, Tathyane Harumi Nakajima Teshima, Ricardo Hsieh, Milena Monteiro Souza, Marcello Menta Simonsen Nico, Silvia Vanessa Lourenco
Salivary glands are essential organs that produce and secrete saliva to the oral cavity. During gland morphogenesis, many developmental processes involve a series of coordinated movements and reciprocal interactions between the epithelium and mesenchyme that generate the ductal system and the secretory units. Recent studies have shown new findings about salivary gland development, particularly regarding lumen formation and expansion, with the involvement of apoptosis and cell polarization, respectively. Moreover, it has been observed that human minor salivary glands start forming earlier than previously published and that distinct apoptotic mediators can trigger duct lumen opening in humans...
February 13, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28188424/fine-tuning-of-the-flavonoid-and-monolignol-pathways-during-apple-early-fruit-development
#14
Paolo Baldi, Mirko Moser, Matteo Brilli, Urska Vrhovsek, Massimo Pindo, Azeddine Si-Ammour
A coordinated regulation of different branches of the flavonoid pathway was highlighted that may contribute to elucidate the role of this important class of compounds during the early stages of apple fruit development. Apple (Malus × domestica Borkh.) is an economically important fruit appreciated for its organoleptic characteristics and its benefits for human health. The first stages after fruit set represent a very important and still poorly characterized developmental process. To enable the profiling of genes involved in apple early fruit development, we combined the suppression subtractive hybridization (SSH) protocol to next-generation sequencing...
February 11, 2017: Planta
https://www.readbyqxmd.com/read/28187138/a-randomized-controlled-trial-of-a-group-based-gaze-training-intervention-for-children-with-developmental-coordination-disorder
#15
Greg Wood, Charlotte A L Miles, Ginny Coyles, Omid Alizadehkhaiyat, Samuel J Vine, Joan N Vickers, Mark R Wilson
: The aim of this study was to integrate a gaze training intervention (i.e., quiet eye training; QET) that has been shown to improve the throwing and catching skill of children with Developmental Coordination Disorder (DCD), within an approach (i.e., group therapy) that might alleviate the negative psychosocial impact of these motor skill deficits. Twenty-one children with DCD were split into either QET (8 male 3 female, mean age of 8.6 years (SD = 1.04) or technical training (TT) groups (7 male 3 female, mean age of 8...
2017: PloS One
https://www.readbyqxmd.com/read/28181219/developmental-relations-among-motor-and-cognitive-processes-and-mathematics-skills
#16
Helyn Kim, Chelsea A K Duran, Claire E Cameron, David Grissmer
This study explored transactional associations among visuomotor integration, attention, fine motor coordination, and mathematics skills in a diverse sample of one hundred thirty-five 5-year-olds (kindergarteners) and one hundred nineteen 6-year-olds (first graders) in the United States who were followed over the course of 2 school years. Associations were dynamic, with more reciprocal transactions occurring in kindergarten than in the later grades. Specifically, visuomotor integration and mathematics exhibited ongoing reciprocity in kindergarten and first grade, attention contributed to mathematics in kindergarten and first grade, mathematics contributed to attention across the kindergarten year only, and fine motor coordination contributed to mathematics indirectly, through visuomotor integration, across kindergarten and first grade...
February 9, 2017: Child Development
https://www.readbyqxmd.com/read/28179879/cannabinoid-receptors-modulate-neuronal-morphology-and-ankyring-density-at-the-axon-initial-segment
#17
Mónica Tapia, Ana Dominguez, Wei Zhang, Ana Del Puerto, María Ciorraga, María José Benitez, Carmen Guaza, Juan José Garrido
Neuronal polarization underlies the ability of neurons to integrate and transmit information. This process begins early in development with axon outgrowth, followed by dendritic growth and subsequent maturation. In between these two steps, the axon initial segment (AIS), a subcellular domain crucial for generating action potentials (APs) and maintaining the morphological and functional polarization, starts to develop. However, the cellular/molecular mechanisms and receptors involved in AIS initial development and maturation are mostly unknown...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28179809/sex-in-the-brain-hormones-and-sex-differences
#18
Jordan Marrocco, Bruce S McEwen
Contrary to popular belief, sex hormones act throughout the entire brain of both males and females via both genomic and nongenomic receptors. Many neural and behavioral functions are affected by estrogens, including mood, cognitive function, blood pressure regulation, motor coordination, pain, and opioid sensitivity. Subtle sex differences exist for many of these functions that are developmentally programmed by hormones and by not yet precisely defined genetic factors, including the mitochondrial genome. These sex differences, and responses to sex hormones in brain regions and upon functions not previously regarded as subject to such differences, indicate that we are entering a new era in our ability to understand and appreciate the diversity of gender-related behaviors and brain functions...
December 2016: Dialogues in Clinical Neuroscience
https://www.readbyqxmd.com/read/28177589/the-evolution-of-amniote-gastrulation-the-blastopore-primitive-streak-transition
#19
REVIEW
Matthew J Stower, Federica Bertocchini
In the animal kingdom, gastrulation, the process by which the primary germ layers are formed involves a dramatic transformation in the topology of the cells that give rise to all of the tissues of the adult. Initially formed as a mono-layer, this tissue, the epiblast, becomes subdivided through the internalization of cells, thereby forming a two (bi-laminar) or three (tri-laminar) layered embryo. This morphogenetic process coordinates the development of the fundamental body plan and the three-body axes (antero-posterior, dorso-ventral, and left-right) and begins a fundamental segregation of cells toward divergent developmental fates...
February 8, 2017: Wiley Interdisciplinary Reviews. Developmental Biology
https://www.readbyqxmd.com/read/28174623/expression-patterns-of-passiflora-edulis-apetala1-fruitfull-homologues-shed-light-onto-tendril-and-corona-identities
#20
Livia C T Scorza, Jose Hernandes-Lopes, Gladys F A Melo-de-Pinna, Marcelo C Dornelas
BACKGROUND: Passiflora (passionflowers) makes an excellent model for studying plant evolutionary development. They are mostly perennial climbers that display axillary tendrils, which are believed to be modifications of the inflorescence. Passionflowers are also recognized by their unique flower features, such as the extra whorls of floral organs composed of corona filaments and membranes enclosing the nectary. Although some work on Passiflora organ ontogeny has been done, the developmental identity of both Passiflora tendrils and the corona is still controversial...
2017: EvoDevo
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