Abstract：
:The Rho family of small GTPases has been implicated in many neurological disorders including mental retardation, but whether they are involved in primary microcephaly (microcephalia vera) is unknown. Here, we examine the role of Rac1 in mammalian neural progenitors and forebrain development by a conditional gene-targeting strategy using the Foxg1-Cre line to delete floxed-Rac1 alleles in the telencephalic ventricular zone (VZ) of mouse embryos. We found that Rac1 deletion in the telencephalic VZ progenitors resulted in reduced sizes of both the striatum and cerebral cortex. Analyses further indicated that this abnormality was caused by accelerated cell-cycle exit and increased apoptosis during early corticogenesis (approximately E14.5), leading to a decrease of the neural progenitor pool in mid-to-late telencephalic development (E16.5 to E18.5). Moreover, the formation of patch-matrix compartments in the striatum was impaired by Rac1-deficiency. Together, these results suggest that Rac1 regulates self-renewal, survival, and differentiation of telencephalic neural progenitors, and that dysfunctions of Rac1 may lead to primary microcephaly.
journal_name
Dev Bioljournal_title
Developmental biologyauthors
Chen L,Melendez J,Campbell K,Kuan CY,Zheng Ydoi
10.1016/j.ydbio.2008.10.023subject
Has Abstractpub_date
2009-01-01 00:00:00pages
162-70issue
1eissn
0012-1606issn
1095-564Xpii
S0012-1606(08)01275-Xjournal_volume
325pub_type
杂志文章abstract：:NK genes are related pan-metazoan homeobox genes. In the fruitfly, NK genes are clustered and involved in patterning various mesodermal derivatives during embryogenesis. It was therefore suggested that the NK cluster emerged in evolution as an ancestral mesodermal patterning cluster. To test this hypothesis, we cloned...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/j.ydbio.2008.02.013
更新日期：2008-05-15 00:00:00
abstract：:Primitive erythropoiesis is regulated in a non cell-autonomous fashion across evolution from frogs to mammals. In Xenopus laevis, signals from the overlying ectoderm are required to induce the mesoderm to adopt an erythroid fate. Previous studies in our lab identified the transcription factor GATA2 as a key regulator ...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/j.ydbio.2015.08.012
更新日期：2015-11-01 00:00:00
abstract：:The mammalian Cul4 genes, Cul4A and Cul4B, encode the scaffold components of the cullin-based E3 ubiquitin ligases. The two Cul4 genes are functionally redundant. Recent study indicated that mice expressing a truncated CUL4A that fails to interact with its functional partner ROC1 exhibit no developmental phenotype. We...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/j.ydbio.2011.01.028
更新日期：2011-04-15 00:00:00
abstract：:The relative transcription of three unlinked actin genes of the sea urchin Strongylocentrotus purpuratus was measured in isolated nuclei, at several stages during embryonic development. Transcription of two cytoskeletal actin genes, CyI and CyIIIa, was first detected in 64-128 cell embryos. At the early stages, the Cy...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/0012-1606(87)90473-8
更新日期：1987-11-01 00:00:00
abstract：:Members of the basic helix-loop-helix family of DNA binding proteins have important roles in the development of subpopulations of neural crest-derived neurons. We have cloned the chicken homologues of dHAND (HAND2) and eHAND (HAND1), basic helix-loop-helix DNA binding proteins whose neuronal expression is restricted t...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1006/dbio.1999.9450
更新日期：1999-11-01 00:00:00
abstract：:Egfr/Ras signaling promotes vein cell fate specification in the developing Drosophila wing. While the importance of Ras signaling in vein determination has been extensively documented, the mechanisms linking Ras activity to vein differentiation remain unclear. We found that Ras signaling regulates both the levels and ...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/j.ydbio.2007.08.003
更新日期：2007-11-01 00:00:00
abstract：:Within euarthropods, the morphological and molecular mechanisms of early nervous system development have been analysed in insects and several representatives of chelicerates and myriapods, while data on crustaceans are fragmentary. Neural stem cells (neuroblasts) generate the nervous system in insects and in higher cr...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/j.ydbio.2011.05.662
更新日期：2011-09-01 00:00:00
abstract：:The tadpole-type larva of Ciona has emerged as an intriguing model system for the study of neurodevelopment. The Ciona intestinalis connectome has been recently mapped, revealing the smallest central nervous system (CNS) known in any chordate, with only 177 neurons. This minimal CNS is highly reminiscent of larger CNS...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/j.ydbio.2018.09.023
更新日期：2019-04-15 00:00:00
abstract：:Proliferating intestinal stem cells (ISCs) generate all cell types of the Drosophila midgut, including enterocytes, endocrine cells, and gland cells (e.g., copper cells), throughout the lifetime of the animal. Among the signaling mechanisms controlling the balance between ISC self-renewal and the production of differe...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/j.ydbio.2016.06.018
更新日期：2016-08-15 00:00:00
abstract：:A fundamental issue during nervous system development is how individual cells are formed from the undefined precursors. Differentiated neurons and glia, two major cell types mediating neuronal function, are acquired from immature precursors via a series of explicit controls exerted by transcription factors such as pro...
journal_title：Developmental biology
pub_type： 杂志文章,评审
doi：10.1016/j.ydbio.2012.07.018
更新日期：2012-10-01 00:00:00
abstract：:Acquisition of limb-forming ability by discrete regions of the lateral plate of the chick embryo is thought to depend on a signaling cascade moving sequentially from the area of Hensen's node to the somitic mesoderm, the intermediate mesoderm, and then to the prospective limb-forming regions of the lateral plate (Step...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1006/dbio.1997.8646
更新日期：1997-08-15 00:00:00
abstract：:We have cloned a Caenorhabditis elegans homologue of the Drosophila gap gene hunchback (hb) and have designated it hbl-1 (hunchback-like). hbl-1 encodes a predicted 982-amino-acid protein, containing two putative zinc-finger domains similar to those of Drosophila Hunchback. The gene is transcribed embryonically, but u...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1006/dbio.1998.9096
更新日期：1999-01-15 00:00:00
abstract：:Vertebrate morphology has been evolutionarily modified by natural and/or artificial selection. The morphological variation of goldfish is a representative example. In particular, the twin-tail strain of ornamental goldfish shows highly diverged anal and caudal fin morphology: bifurcated anal and caudal fins. Recent mo...
journal_title：Developmental biology
pub_type： 杂志文章,评审
doi：10.1016/j.ydbio.2016.11.022
更新日期：2017-07-15 00:00:00
abstract：:Metazoan development involves a myriad of dynamic cellular processes that require cytoskeletal function. Nonmuscle myosin II plays essential roles in embryonic development; however, knowledge of its role in post-embryonic development, even in model organisms such as Drosophila melanogaster, is only recently being reve...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/j.ydbio.2010.06.028
更新日期：2010-09-15 00:00:00
abstract：:We investigated the influence of the growth surface on the direction of Xenopus spinal neurite growth in the presence of a dc electric field of physiological magnitude. The direction of galvanotropism was determined by the substratum; neurites grew toward the negative electrode (cathode) on untreated Falcon tissue cul...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1006/dbio.1998.9039
更新日期：1998-11-15 00:00:00
abstract：:The relationship among neuronal type, position, and time course of development of identified neurons was examined in the zebrafish (Brachydanio rerio). The cells studied, the reticulospinal neurons Mauthner, MiM1, and MiV1, are located within the same small region in the hindbrain, differ stereotypically in their posi...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/0012-1606(85)90422-1
更新日期：1985-12-01 00:00:00
abstract：:It has been posited that animal development evolved from pre-existing mechanisms for regulating cell differentiation in the single celled and colonial ancestors of animals. Although the progenitors of animals cannot be studied directly, insights into their cell biology may be gleaned from comparisons between animals a...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/j.ydbio.2011.06.003
更新日期：2011-09-01 00:00:00
abstract：:The mammillary body, a ventral specialization of the caudal hypothalamus, lies close to the transition between epichordal and prechordal parts of the forebrain (Puelles and Rubenstein, 2003). This report examines its presumed causal connection with either prechordal or notochordal mesodermal induction, as well as the ...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/j.ydbio.2008.05.545
更新日期：2008-08-15 00:00:00
abstract：:Cytoskeletal intermediate filaments were studied in muscular dysgenesis (mdg) and tetrodotoxin-treated inactive mouse embryo muscle cultures during myofibrillogenesis. Both muscular dysgenesis and tetrodotoxin-treated muscles are characterized in vitro by a total lack of contractile activity and an abnormal developmen...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/0012-1606(88)90159-5
更新日期：1988-09-01 00:00:00
abstract：:Human MusTRD1alpha1 was isolated as a result of its ability to bind a critical element within the Troponin I slow upstream enhancer (TnIslow USE) and was predicted to be a regulator of slow fiber-specific genes. To test this hypothesis in vivo, we generated transgenic mice expressing hMusTRD1alpha1 in skeletal muscle....
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/j.ydbio.2006.01.019
更新日期：2006-05-01 00:00:00
abstract：:The ciliated band of the Strongylocentrotus purpuratus embryo consists of a columnar epithelium, 3-5 cells wide, which gives rise to a small number of neuroblasts. It arises late in development, as a border separating the squamous epithelial cells of the oral and aboral ectoderm. To determine the lineage origins of th...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1006/dbio.1993.1313
更新日期：1993-12-01 00:00:00
abstract：:The shoot meristem generates all of the aerial structures of an adult plant. It is organized in three layers which produce the epidermis (L1 layer) and the subepidermal layers (L2 and L3). The origin of adult structures has previously been fate mapped to the primary meristem for L2 and L3 tissues. In this work we cons...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1006/dbio.1996.0112
更新日期：1996-05-01 00:00:00
abstract：UNLABELLED:Notch signaling plays an acknowledged role in bile-duct development, but its involvement in cholangiocyte-fate determination remains incompletely understood. We investigated the effects of early Notch2 deletion in Notch2(fl/fl)/Alfp-Cre(tg/-) ("Notch2-cKO") and Notch2(fl/fl)/Alfp-Cre(-/-) ("control") mice. F...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/j.ydbio.2014.10.002
更新日期：2014-12-15 00:00:00
abstract：:Transcription factors are key orchestrators of the emergence of neuronal diversity within the developing spinal cord. As such, the two paralogous proteins Pax3 and Pax7 regulate the specification of progenitor cells within the intermediate neural tube, by defining a neat segregation between those fated to form motor c...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/j.ydbio.2017.06.014
更新日期：2017-12-01 00:00:00
abstract：:Neuropilin (previously known as the A5 protein) is a membrane protein identified in Xenopus and is presumed to be involved in the target recognition of the optic nerve fibers. We have isolated cDNAs encoding the chick homologue of neuropilin, using the Xenopus neuropilin cDNA as a hybridization probe. The predicted am...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1006/dbio.1995.1208
更新日期：1995-07-01 00:00:00
abstract：:Morphogenesis of the cartilaginous otic capsule is directed by interactions between the epithelial anlage of the membranous labyrinth (otocyst) and its associated periotic mesenchyme. Utilizing a developmental series of high-density (micromass) cultures of periotic mesenchyme to model capsule chondrogenesis, we have s...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/0012-1606(91)90476-j
更新日期：1991-03-01 00:00:00
abstract：:We report here the identification and characterization of a novel gene, T1 alpha, expressed in high abundance in adult rat lung, fetal lung, and early fetal brain. T1 alpha was identified by a monoclonal antibody previously shown to be specific for an antigen expressed by alveolar epithelial type I cells. The cDNA for...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1006/dbio.1995.1024
更新日期：1995-01-01 00:00:00
abstract：:The relationship between cellular position and growth control has been studied in cultures of dissociated fragments of mouse limb bud cells. Using cells derived from various positions along the anterior-posterior axis of the limb bud we have developed culture conditions that optimize growth of positionally isolated ce...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/0012-1606(92)90208-x
更新日期：1992-05-01 00:00:00
abstract：:The effect of epidermal growth factor (EGF) on cellular differentiation of the neonatal mouse mandibular incisor was examined autoradiographically using tritiated thymidine ([3H]TDR) and tritiated proline ([3H]PRO). On days 0 (day of birth), 1, and 2, EGF was administered (3 micrograms/g body wt) sc to neonates. Mice ...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/0012-1606(87)90506-9
更新日期：1987-12-01 00:00:00
abstract：:It has long been appreciated that the localization of cytoplasmic determinants in the egg can provide the foundation for patterning in the embryo. Differences in cell fate among the early blastomeres are thus a consequence of asymmetric distributions of informational molecules prior to fertilization. The frog egg has ...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1006/dbio.1997.8773
更新日期：1997-12-15 00:00:00
