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Frontiers in Cell and Developmental Biology

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https://www.readbyqxmd.com/read/28770198/arsenic-hyperaccumulation-strategies-an-overview
#1
REVIEW
Zahra Souri, Naser Karimi, Luisa M Sandalio
Arsenic (As) pollution, which is on the increase around the world, poses a growing threat to the environment. Phytoremediation, an important green technology, uses different strategies, including As uptake, transport, translocation, and detoxification, to remediate this metalloid. Arsenic hyperaccumulator plants have developed various strategies to accumulate and tolerate high concentrations of As. In these plants, the formation of AsIII complexes with GSH and phytochelatins and their transport into root and shoot vacuoles constitute important mechanisms for coping with As stress...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28770197/wave-propagation-of-junctional-remodeling-in-collective-cell-movement-of-epithelial-tissue-numerical-simulation-study
#2
Tetsuya Hiraiwa, Erina Kuranaga, Tatsuo Shibata
During animal development, epithelial cells forming a monolayer sheet move collectively to achieve the morphogenesis of epithelial tissues. One driving mechanism of such collective cell movement is junctional remodeling, which is found in the process of clockwise rotation of Drosophila male terminalia during metamorphosis. However, it still remains unknown how the motions of cells are spatiotemporally organized for collective movement by this mechanism. Since these moving cells undergo elastic deformations, the influence of junctional remodeling may mechanically propagate among them, leading to spatiotemporal pattern formations...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28748182/mycobacteria-modify-their-cell-size-control-under-sub-optimal-carbon-sources
#3
Miles Priestman, Philipp Thomas, Brian D Robertson, Vahid Shahrezaei
The decision to divide is the most important one that any cell must make. Recent single cell studies suggest that most bacteria follow an "adder" model of cell size control, incorporating a fixed amount of cell wall material before dividing. Mycobacteria, including the causative agent of tuberculosis Mycobacterium tuberculosis, are known to divide asymmetrically resulting in heterogeneity in growth rate, doubling time, and other growth characteristics in daughter cells. The interplay between asymmetric cell division and adder size control has not been extensively investigated...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28680878/at-term-xmo-and-xpo-mouse-placentas-show-differences-in-glucose-metabolism-in-the-trophectoderm-derived-outer-zone
#4
Nannan He, Shujing J Lim, Joana C Moreira de Mello, Injerreau Navarro, Monika Bialecka, Daniela C F Salvatori, Lucette A J van der Westerlaken, Lygia V Pereira, Susana M Chuva de Sousa Lopes
Genetic mouse model (39,XO) for human Turner Syndrome (45,XO) harboring either a single maternally inherited (Xm) or paternally inherited (Xp) chromosome show a pronounced difference in survival rate at term. However, a detailed comparison of XmO and XpO placentas to explain this difference is lacking. We aimed to investigate the morphological and molecular differences between XmO and XpO term mouse placentas. We observed that XpO placentas at term contained a significantly larger area of glycogen cells (GCs) in their outer zone, compared to XmO, XX, and XY placentas...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28660186/use-of-imaging-techniques-to-illuminate-dynamics-of-hematopoietic-stem-cells-and-their-niches
#5
REVIEW
Takayuki Morikawa, Keiyo Takubo
Continuous generation of blood cells over an organism's lifetime is supported by hematopoietic stem/progenitor cells (HSPCs) capable of producing all hematopoietic cell subtypes. Adult mammalian HSPCs are localized to bone marrow and regulated by their neighboring microenvironment, or "niche." Because interactions of HSPCs with their niches are highly dynamic and complex, the recent development of imaging technologies provides a powerful new tool to understand stem cell/niche biology. In this review, we discuss recent advances in our understanding of dynamic HSPC/niche interactions during development, homeostasis, disease states or aging with a focus on studies advanced by imaging analysis...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28638821/the-tor-signaling-pathway-in-spatial-and-temporal-control-of-cell-size-and-growth
#6
REVIEW
Suam Gonzalez, Charalampos Rallis
Cell size is amenable by genetic and environmental factors. The highly conserved nutrient-responsive Target of Rapamycin (TOR) signaling pathway regulates cellular metabolic status and growth in response to numerous inputs. Timing and duration of TOR pathway activity is pivotal for both cell mass built up as well as cell cycle progression and is controlled and fine-tuned by the abundance and quality of nutrients, hormonal signals, growth factors, stress, and oxygen. TOR kinases function within two functionally and structurally discrete multiprotein complexes, TORC1 and TORC2, that are implicated in temporal and spatial control of cell size and growth respectively; however, recent data indicate that such functional distinctions are much more complex...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28626748/the-multiple-roles-of-fgf-signaling-in-the-developing-spinal-cord
#7
REVIEW
Ruth Diez Del Corral, Aixa V Morales
During vertebrate embryonic development, the spinal cord is formed by the neural derivatives of a neuromesodermal population that is specified at early stages of development and which develops in concert with the caudal regression of the primitive streak. Several processes related to spinal cord specification and maturation are coupled to this caudal extension including neurogenesis, ventral patterning and neural crest specification and all of them seem to be crucially regulated by Fibroblast Growth Factor (FGF) signaling, which is prominently active in the neuromesodermal region and transiently in its derivatives...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28611984/editorial-in-search-of-in-vivo-msc
#8
EDITORIAL
Simone Pacini, Mario Petrini
No abstract text is available yet for this article.
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28603713/dishevelled-paralogs-in-vertebrate-development-redundant-or-distinct
#9
REVIEW
Marc Gentzel, Alexandra Schambony
Dishevelled (DVL) proteins are highly conserved in the animal kingdom and are important key players in β-Catenin-dependent and -independent Wnt signaling pathways. Vertebrate genomes typically comprise three DVL genes, DVL1, DVL2, and DVL3. Expression patterns and developmental functions of the three vertebrate DVL proteins however, are only partially redundant in any given species. Moreover, expression and function of DVL isoforms have diverged between different vertebrate species. All DVL proteins share basic functionality in Wnt signal transduction...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28603712/growth-rate-as-a-direct-regulator-of-the-start-network-to-set-cell-size
#10
REVIEW
Martí Aldea, Kirsten Jenkins, Attila Csikász-Nagy
Cells are able to adjust their growth and size to external inputs to comply with specific fates and developmental programs. Molecular pathways controlling growth also have an enormous impact in cell size, and bacteria, yeast, or epithelial cells modify their size as a function of growth rate. This universal feature suggests that growth (mass) and proliferation (cell number) rates are subject to general coordinating mechanisms. However, the underlying molecular connections are still a matter of debate. Here we review the current ideas on growth and cell size control, and focus on the possible mechanisms that could link the biosynthetic machinery to the Start network in budding yeast...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28603711/autophagy-in-the-vertebrate-inner-ear
#11
REVIEW
Marta Magariños, Sara Pulido, María R Aburto, Rocío de Iriarte Rodríguez, Isabel Varela-Nieto
Autophagy is a conserved catabolic process that results in the lysosomal degradation of cell components. During development, autophagy is associated with tissue and organ remodeling, and under physiological conditions it is tightly regulated as it plays a housekeeping role in removing misfolded proteins and damaged organelles. The vertebrate inner ear is a complex sensory organ responsible for the perception of sound and for balance. Cell survival, death and proliferation, as well as cell fate specification and differentiation, are processes that are strictly coordinated during the development of the inner ear in order to generate the more than a dozen specialized cell types that constitute this structure...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28589121/pancreatic-beta-cell-identity-in-humans-and-the-role-of-type-2-diabetes
#12
REVIEW
Piero Marchetti, Marco Bugliani, Vincenzo De Tata, Mara Suleiman, Lorella Marselli
Pancreatic beta cells uniquely synthetize, store, and release insulin. Specific molecular, functional as well as ultrastructural traits characterize their insulin secretion properties and survival phentoype. In this review we focus on human islet/beta cells, and describe the changes that occur in type 2 diabetes and could play roles in the disease as well as represent possible targets for therapeutical interventions. These include transcription factors, molecules involved in glucose metabolism and insulin granule handling...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28573133/regulation-of-osteoclast-growth-and-fusion-by-mtor-raptor-and-mtor-rictor-akt
#13
Kerstin Tiedemann, Damien Le Nihouannen, Jenna E Fong, Osama Hussein, Jake E Barralet, Svetlana V Komarova
Osteoclasts are giant bone cells formed by fusion from monocytes and uniquely capable of a complete destruction of mineralized tissues. Previously, we have demonstrated that in energy-rich environment not only osteoclast fusion index (the number of nuclei each osteoclast contains), but also cytoplasm volume per single nucleus was increased. The goal of this study was to investigate the regulation of metabolic sensor mTOR during osteoclast differentiation in energy-rich environment simulated by addition of pyruvate...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28555185/molecular-determinants-of-cephalopod-muscles-and-their-implication-in-muscle-regeneration
#14
REVIEW
Letizia Zullo, Sara M Fossati, Pamela Imperadore, Marie-Therese Nödl
The ability to regenerate whole-body structures has been studied for many decades and is of particular interest for stem cell research due to its therapeutic potential. Several vertebrate and invertebrate species have been used as model systems to study pathways involved in regeneration in the past. Among invertebrates, cephalopods are considered as highly evolved organisms, which exhibit elaborate behavioral characteristics when compared to other mollusks including active predation, extraordinary manipulation, and learning abilities...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28553634/neural-stem-cell-plasticity-advantages-in-therapy-for-the-injured-central-nervous-system
#15
REVIEW
Linda Ottoboni, Arianna Merlini, Gianvito Martino
The physiological and pathological properties of the neural germinal stem cell niche have been well-studied in the past 30 years, mainly in animals and within given limits in humans, and knowledge is available for the cyto-architectonic structure, the cellular components, the timing of development and the energetic maintenance of the niche, as well as for the therapeutic potential and the cross talk between neural and immune cells. In recent years we have gained detailed understanding of the potentiality of neural stem cells (NSCs), although we are only beginning to understand their molecular, metabolic, and epigenetic profile in physiopathology and, further, more can be invested to measure quantitatively the activity of those cells, to model in vitro their therapeutic responses or to predict interactions in silico...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28540289/stem-cell-induced-biobridges-as-possible-tools-to-aid-neuroreconstruction-after-cns-injury
#16
REVIEW
Jea Y Lee, Kaya Xu, Hung Nguyen, Vivian A Guedes, Cesar V Borlongan, Sandra A Acosta
Notch-induced mesenchymal stromal cells (MSCs) mediate a distinct mechanism of repair after brain injury by forming a biobridge that facilitates biodistribution of host cells from a neurogenic niche to the area of injury. We have observed the biobridge in an area between the subventricular zone and the injured cortex using immunohistochemistry and laser capture. Cells in the biobridge express high levels of extracellular matrix metalloproteinases (MMPs), specifically MMP-9, which co-localized with a trail of MSCs graft...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28540288/recent-insights-into-the-role-of-unfolded-protein-response-in-er-stress-in-health-and-disease
#17
REVIEW
Dan Lindholm, Laura Korhonen, Ove Eriksson, Sulev Kõks
Unfolded stress response (UPR) is a conserved cellular pathway involved in protein quality control to maintain homeostasis under different conditions and disease states characterized by cell stress. Although three general schemes of and genes induced by UPR are rather well-established, open questions remain including the precise role of UPR in human diseases and the interactions between different sensor systems during cell stress signaling. Particularly, the issue how the normally adaptive and pro-survival UPR pathway turns into a deleterious process causing sustained endoplasmic reticulum (ER) stress and cell death requires more studies...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28534026/how-cells-can-control-their-size-by-pumping-ions
#18
Alan R Kay
The ability of all cells to set and regulate their size is a fundamental aspect of cellular physiology. It has been known for sometime but not widely so, that size stability in animal cells is dependent upon the operation of the sodium pump, through the so-called pump-leak mechanism (Tosteson and Hoffman, 1960). Impermeant molecules in cells establish an unstable osmotic condition, the Donnan effect, which is counteracted by the operation of the sodium pump, creating an asymmetry in the distribution of Na(+) and K(+) staving off water inundation...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28529939/naturally-engineered-maturation-of-cardiomyocytes
#19
REVIEW
Gaetano J Scuderi, Jonathan Butcher
Ischemic heart disease remains one of the most prominent causes of mortalities worldwide with heart transplantation being the gold-standard treatment option. However, due to the major limitations associated with heart transplants, such as an inadequate supply and heart rejection, there remains a significant clinical need for a viable cardiac regenerative therapy to restore native myocardial function. Over the course of the previous several decades, researchers have made prominent advances in the field of cardiac regeneration with the creation of in vitro human pluripotent stem cell-derived cardiomyocyte tissue engineered constructs...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28529938/senescence-inflammatory-regulation-of-reparative-cellular-reprogramming-in-aging-and-cancer
#20
Javier A Menendez, Tomás Alarcón
The inability of adult tissues to transitorily generate cells with functional stem cell-like properties is a major obstacle to tissue self-repair. Nuclear reprogramming-like phenomena that induce a transient acquisition of epigenetic plasticity and phenotype malleability may constitute a reparative route through which human tissues respond to injury, stress, and disease. However, tissue rejuvenation should involve not only the transient epigenetic reprogramming of differentiated cells, but also the committed re-acquisition of the original or alternative committed cell fate...
2017: Frontiers in Cell and Developmental Biology
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