Abstract：
:We have used Drosophila ovarian follicle stem cells (FSCs) to study how stem cells are regulated by external signals and draw three main conclusions. First, the spatial definition of supportive niche positions for FSCs depends on gradients of Hh and JAK-STAT pathway ligands, which emanate from opposite, distant sites. FSC position may be further refined by a preference for low-level Wnt signaling. Second, hyperactivity of supportive signaling pathways can compensate for the absence of the otherwise essential adhesion molecule, DE-cadherin, suggesting a close regulatory connection between niche adhesion and niche signals. Third, FSC behavior is determined largely by summing the inputs of multiple signaling pathways of unequal potencies. Altogether, our findings indicate that a stem cell niche need not be defined by short-range signals and invariant cell contacts; rather, for FSCs, the intersection of gradients of long-range niche signals regulates the longevity, position, number, and competitive behavior of stem cells.
journal_name
Dev Celljournal_title
Developmental cellauthors
Vied C,Reilein A,Field NS,Kalderon Ddoi
10.1016/j.devcel.2012.09.010subject
Has Abstractpub_date
2012-10-16 00:00:00pages
836-48issue
4eissn
1534-5807issn
1878-1551pii
S1534-5807(12)00421-2journal_volume
23pub_type
杂志文章abstract：:The majority of excitatory synaptic transmission in the brain occurs at dendritic spines, which are actin-rich protrusions on the dendrites. The asymmetric nature of these structures suggests that proteins regulating cell polarity might be involved in their formation. Indeed, the polarity protein PAR-3 is required for...
journal_title：Developmental cell
pub_type： 杂志文章
doi：10.1016/j.devcel.2007.11.020
更新日期：2008-02-01 00:00:00
abstract：:Signaling circuits often coordinate cellular membranes and actin filaments at distinct sites to direct cell behavior. In this issue of Developmental Cell, Bershteyn et al. outline how the molecular scaffold protein, MIM, which bends membranes and binds actin filaments, is at the middle of one such circuit to regulate ...
journal_title：Developmental cell
pub_type： 评论,杂志文章
doi：10.1016/j.devcel.2010.07.021
更新日期：2010-08-17 00:00:00
abstract：:The correct assignment of cell fate within fields of multipotent progenitors is essential for accurate tissue diversification. The first lymphatic vessels arise from pre-existing veins after venous endothelial cells become specified as lymphatic progenitors. Prox1 specifies lymphatic fate and labels these progenitors;...
journal_title：Developmental cell
pub_type： 杂志文章
doi：10.1016/j.devcel.2019.03.017
更新日期：2019-04-22 00:00:00
abstract：:The shape of most complex organ systems arises from the directed migration of cohesive groups of cells. Here, we dissect the role of the chemokine guidance receptor Cxcr4b in regulating the collective migration of one such cohesive tissue, the zebrafish lateral line primordium. Using in vivo imaging, we show that the ...
journal_title：Developmental cell
pub_type： 杂志文章
doi：10.1016/j.devcel.2006.02.019
更新日期：2006-05-01 00:00:00
abstract：:Migrating cells reorganize their actin and microtubule cytoskeletons in response to external cues. In this issue of Developmental Cell, Watanabe et al. now show a molecular connection between the actin crosslinking protein IQGAP1 and the microtubule-stabilizing protein APC that impacts cells' ability to migrate into a...
journal_title：Developmental cell
pub_type： 评论,杂志文章,评审
doi：10.1016/j.devcel.2004.11.012
更新日期：2004-12-01 00:00:00
abstract：:Brassinosteroids (BRs) are essential hormones for plant growth and development. BRs regulate gene expression by inducing dephosphorylation of two key transcription factors, BZR1 and BZR2/BES1, through a signal transduction pathway that involves cell-surface receptors (BRI1 and BAK1) and a GSK3 kinase (BIN2). How BR-re...
journal_title：Developmental cell
pub_type： 杂志文章
doi：10.1016/j.devcel.2007.06.009
更新日期：2007-08-01 00:00:00
abstract：:TORC1 is arguably the best-studied regulator of cellular growth in eukaryotes. However, its activity has not been assessed in vivo in developing multicellular organisms. Two studies in this issue of Developmental Cell (Kim et al., 2017; Romero-Pozuelo et al., 2017) surprisingly reveal a patchy, cell-cycle-controlled p...
journal_title：Developmental cell
pub_type： 评论,杂志文章
doi：10.1016/j.devcel.2017.08.007
更新日期：2017-08-21 00:00:00
abstract：:Constitutive exocytosis delivers newly synthesized proteins, lipids, and other molecules from the Golgi apparatus to the cell surface. This process is mediated by vesicles, which bud off the trans-Golgi network, move along cytoskeletal filaments, and fuse with the plasma membrane. Here, we show that the small GTPase R...
journal_title：Developmental cell
pub_type： 杂志文章
doi：10.1016/j.devcel.2007.06.010
更新日期：2007-08-01 00:00:00
abstract：:Boundary formation and epithelialization are crucial processes in the morphological segmentation of vertebrate somites. By a genetic screening procedure with zebrafish, we identified two genes, integrinalpha5 (itga5) and fibronectin (fn), required for these processes. Fibronectin proteins accumulate at somite boundari...
journal_title：Developmental cell
pub_type： 杂志文章
doi：10.1016/j.devcel.2005.03.006
更新日期：2005-04-01 00:00:00
abstract：:Several genes have been implicated in heart tube formation, yet we know little about underlying cellular mechanisms. We analyzed the cellular architecture of the migrating myocardial precursors, and find that they form coherent epithelia that mature as they move medially. Mutant analyses indicate that the cardia bifid...
journal_title：Developmental cell
pub_type： 杂志文章
doi：10.1016/s1534-5807(04)00063-2
更新日期：2004-03-01 00:00:00
abstract：:Pancreatic beta cells have been shown to be heterogeneous at multiple levels. However, spatially interrogating transcriptional heterogeneity in the intact tissue has been challenging. Here, we developed an optimized protocol for single-molecule transcript imaging in the intact pancreas and used it to identify a sub-po...
journal_title：Developmental cell
pub_type： 杂志文章
doi：10.1016/j.devcel.2018.11.001
更新日期：2019-01-07 00:00:00
abstract：:Morphological plasticity and front-rear polarity are essential for directed cell migration. In this issue of Developmental Cell, Witze et al. (2013) demonstrate that Wnt5a-mediated signaling induces localization of the cortical endoplasmic reticulum to the trailing edge of melanoma cells and mediates calcium flux, rea...
journal_title：Developmental cell
pub_type： 评论,杂志文章
doi：10.1016/j.devcel.2013.09.013
更新日期：2013-09-30 00:00:00
abstract：:Small repeat-associated siRNAs (rasiRNAs) mediate silencing of retrotransposons and the Stellate locus. Mutations in the Drosophila rasiRNA pathway genes armitage and aubergine disrupt embryonic axis specification, triggering defects in microtubule polarization as well as asymmetric localization of mRNA and protein de...
journal_title：Developmental cell
pub_type： 杂志文章
doi：10.1016/j.devcel.2006.12.001
更新日期：2007-01-01 00:00:00
abstract：:Cell and organelle membranes consist of a complex mixture of phospholipids (PLs) that determine their size, shape, and function. Phosphatidylcholine (PC) is the most abundant phospholipid in eukaryotic membranes, yet how cells sense and regulate its levels in vivo remains unclear. Here we show that PCYT1A, the rate-li...
journal_title：Developmental cell
pub_type： 杂志文章
doi：10.1016/j.devcel.2018.04.012
更新日期：2018-05-21 00:00:00
abstract：:Metazoans express three unfolded protein response transducers (IRE1, PERK, and ATF6) ubiquitously to cope with endoplasmic reticulum (ER) stress. ATF6 is an ER membrane-bound transcription factor activated by ER stress-induced proteolysis and has been duplicated in mammals. Here, we generated ATF6alpha- and ATF6beta-k...
journal_title：Developmental cell
pub_type： 杂志文章
doi：10.1016/j.devcel.2007.07.018
更新日期：2007-09-01 00:00:00
abstract：:In this issue of Developmental Cell, Schuster et al. (2014) describe the signals regulated by the bHLH transcription factor HEC1 during Arabidopsis stem cell maintenance. HEC1 acts antagonistically with other factors, integrating multiple cues to provide a balance between cellular differentiation and proliferation. ...
journal_title：Developmental cell
pub_type： 评论,杂志文章
doi：10.1016/j.devcel.2014.02.006
更新日期：2014-02-24 00:00:00
abstract：:Under conditions of homeostasis, dynamic changes in the length of individual adherens junctions (AJs) provide epithelia with the fluidity required to maintain tissue integrity in the face of intrinsic and extrinsic forces. While the contribution of AJ remodeling to developmental morphogenesis has been intensively stud...
journal_title：Developmental cell
pub_type： 杂志文章
doi：10.1016/j.devcel.2017.09.018
更新日期：2017-11-20 00:00:00
abstract：:TORC1 regulates growth and metabolism, in part, by influencing transcriptional programs. Here, we identify REPTOR and REPTOR-BP as transcription factors downstream of TORC1 that are required for ∼ 90% of the transcriptional induction that occurs upon TORC1 inhibition in Drosophila. Thus, REPTOR and REPTOR-BP are major...
journal_title：Developmental cell
pub_type： 杂志文章
doi：10.1016/j.devcel.2015.03.013
更新日期：2015-05-04 00:00:00
abstract：:The Drosophila compound eye consists of approximately 750 independently functioning ommatidia, each containing two photoreceptor subpopulations. The outer photoreceptors participate in motion detection, while the inner photoreceptors contribute to color vision. Although the inner photoreceptors, R7 and R8, terminally ...
journal_title：Developmental cell
pub_type： 杂志文章
doi：10.1016/s1534-5807(03)00156-4
更新日期：2003-06-01 00:00:00
abstract：:Germ cells, the cells that give rise to sperm and egg, maintain the potential to recreate all cell types in a new individual. This wide developmental potential, or totipotency, is manifested in unusual tumors called teratomas, in which germ cells undergo somatic differentiation. Although recent studies have implicated...
journal_title：Developmental cell
pub_type： 杂志文章
doi：10.1016/j.devcel.2009.08.003
更新日期：2009-09-01 00:00:00
abstract：:The anterior visceral endoderm plays a pivotal role in establishing anterior-posterior polarity of the mouse embryo, but the molecular nature of the signals required remains to be determined. Here, we demonstrate that Cerberus-like(-/-);Lefty1(-/-) compound mutants can develop a primitive streak ectopically in the emb...
journal_title：Developmental cell
pub_type： 杂志文章
doi：10.1016/s1534-5807(02)00321-0
更新日期：2002-11-01 00:00:00
abstract：:One G protein-coupled receptor (GPCR) can activate more than one G protein, but the physiologic importance of such activation has not been demonstrated in vivo. We have generated mice expressing exclusively a mutant form of the PTH/PTHrP receptor (DSEL) that activates adenylyl cyclase normally but not phospholipase C ...
journal_title：Developmental cell
pub_type： 杂志文章
doi：10.1016/s1534-5807(02)00218-6
更新日期：2002-08-01 00:00:00
abstract：:Positive autoregulation is an effective mechanism for the long-term maintenance of a transcription factor's expression. This strategy is widely deployed in cell lineages, where the autoregulatory factor controls the activity of a battery of genes that constitute the differentiation program of a postmitotic cell type. ...
journal_title：Developmental cell
pub_type： 杂志文章
doi：10.1016/j.devcel.2014.02.005
更新日期：2014-04-14 00:00:00
abstract：:Drosophila gurken mRNA is localized by dynein-mediated transport to a crescent near the oocyte nucleus, thus targeting the TGFalpha signal and forming the primary embryonic axes. Here, we show that gurken and the I factor, a non-LTR retrotransposon, share a small consensus RNA stem loop of defined secondary structure,...
journal_title：Developmental cell
pub_type： 杂志文章
doi：10.1016/j.devcel.2005.04.012
更新日期：2005-07-01 00:00:00
abstract：:Mammalian neurulation is completed when the dorsolateral neural folds bend inwards, their tips make adhesive contacts across the midline, and the epithelia remodel to create a closed neural tube. Two recent papers (one by Camerer et al. in this issue of Developmental Cell) demonstrate a vital role for protease-activat...
journal_title：Developmental cell
pub_type： 评论,杂志文章
doi：10.1016/j.devcel.2010.01.002
更新日期：2010-01-19 00:00:00
abstract：:Regulating the osmotic pressure of our body fluids relies on osmosensory neurons that depolarize when their volume decreases. Recently in Neuron, Prager-Khoutorsky et al. (2014) report that this depolarization arises from direct interactions between the transient receptor potential channel TRPV1 and microtubules, whic...
journal_title：Developmental cell
pub_type： 评论,杂志文章
doi：10.1016/j.devcel.2014.08.012
更新日期：2014-08-25 00:00:00
abstract：:RITS (RNA-induced initiation of transcriptional gene silencing complex) plays diverse roles in heterochromatin regulation: silencing transcription by recruitment of chromatin modifiers and destroying transcripts by RNAi. In a recent issue of Molecular Cell, Li et al. now show that the polymerization of Tas3, a compone...
journal_title：Developmental cell
pub_type： 杂志文章
doi：10.1016/j.devcel.2009.05.002
更新日期：2009-05-01 00:00:00
abstract：:Directional cell migration is critical for metazoan development. We define two molecular pathways that activate the Arp2/3 complex during neuroblast migration in Caenorhabditis elegans. The transmembrane protein MIG-13/Lrp12 is linked to the Arp2/3 nucleation-promoting factors WAVE or WASP through direct interactions ...
journal_title：Developmental cell
pub_type： 杂志文章
doi：10.1016/j.devcel.2016.09.029
更新日期：2016-10-24 00:00:00
abstract：:Autophagy is the major cellular process responsible for bulk cytoplasmic degradation. Two reports in this issue of Developmental Cell describe how both PI3 kinase and TOR signaling in Drosophila are critical for controlling autophagy in response to developmental and environmental cues. ...
journal_title：Developmental cell
pub_type： 评论,杂志文章
doi：10.1016/j.devcel.2004.07.014
更新日期：2004-08-01 00:00:00
abstract：:We present new approaches to cis-regulatory module (CRM) discovery in the common scenario where relevant transcription factors and/or motifs are unknown. Beginning with a small list of CRMs mediating a common gene expression pattern, we search genome-wide for CRMs with similar functionality, using new statistical scor...
journal_title：Developmental cell
pub_type： 杂志文章
doi：10.1016/j.devcel.2009.09.002
更新日期：2009-10-01 00:00:00
