Abstract：
:To determine whether low oxygen is a stimulus for endothelial cell differentiation and vascular development in the kidney, we examined the effect of low oxygen on rat metanephric organ culture, a model known to recapitulate nephrogenesis in the absence of vessels. After 6 days in culture in standard (20% O2) or low oxygen (1-3% O2) conditions, metanephric kidney growth and morphology were assessed by DNA measurement, and light and electron microscopy. DNA content was higher in 3% O2-treated explants (2.5 +/- 0.17 microgram/kidney, n = 9) than in 20% O2 explants (1.5 +/- 0.09 microgram/kidney, n = 9), P < 0.05. Low oxygen induced proliferation of tubular epithelial cells, resulting in enhanced number of tubules of similar size. Endothelial cells forming capillaries were localized in 3% O2 explants by light and electron microscopy and by immunocytochemistry using endothelial cell markers. Flt-1, Flk-1, and ACE-containing cells were detected in 3% O2-treated explants, whereas 20% O2 explants were virtually negative. VEGF mRNA levels were 10-fold higher in 3% O2-treated explants than in 20% O2-treated explants. Addition of anti-VEGF antibodies to 3% O2-treated explants prevented low oxygen-induced growth and endothelial cell differentiation and proliferation. Our data indicate that low oxygen stimulates growth by cell proliferation and induces tubulogenesis, endothelial cell differentiation, and vasculogenesis in metanephric kidneys in culture. Upregulation of VEGF expression by low oxygen and prevention of low oxygen-induced tubulogenesis and vasculogenesis by anti-VEGF antibodies indicate that these changes were mediated by VEGF. These data suggest that low oxygen is the stimulus to initiate renal vascularization.
journal_name
Dev Bioljournal_title
Developmental biologyauthors
Tufro-McReddie A,Norwood VF,Aylor KW,Botkin SJ,Carey RM,Gomez RAdoi
10.1006/dbio.1997.8513subject
Has Abstractpub_date
1997-03-15 00:00:00pages
139-49issue
2eissn
0012-1606issn
1095-564Xpii
S0012-1606(97)98513-4journal_volume
183pub_type
杂志文章abstract：:The Egr family of zinc-finger transcription factors, consisting of Egr1, Egr2, Egr3, and Egr4, are involved in cellular growth and differentiation. Adult Egr3-deficient mice are ataxic and lack muscle spindle proprioceptors that normally develop at the sites of Ia afferent-myotube contacts during embryogenesis. To res...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1006/dbio.2001.0202
更新日期：2001-04-15 00:00:00
abstract：:Heparan sulfate proteoglycans (HSPGs) regulate a number of major developmental processes, but their roles in synovial joint formation remain unknown. Here we created conditional mouse embryo mutants lacking Ext1 in developing joints by mating Ext1(f/f) and Gdf5-Cre mice. Ext1 encodes a subunit of the Ext1/Ext2 Golgi-a...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/j.ydbio.2010.12.022
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journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1006/dbio.2000.9811
更新日期：2000-10-01 00:00:00
abstract：:The midbrain-hindbrain boundary (MHB) acts as a local organizer in the development of the CNS in vertebrates. Previously, we identified an MHB-specific bHLH-WRPW transcriptional repressor gene, Xenopus Hes-related 1 (XHR1), which is initially expressed in the presumptive MHB (pre-MHB) region at the early gastrula stag...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/j.ydbio.2005.04.020
更新日期：2005-07-01 00:00:00
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journal_title：Developmental biology
pub_type： 杂志文章
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journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/j.ydbio.2004.08.051
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journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/0012-1606(90)90177-k
更新日期：1990-03-01 00:00:00
abstract：:We describe the identification, biochemical characterisation, and mutation of a novel mouse gene: Sp5. Sp5 encodes a protein having a C-terminal C(2)H(2) zinc finger domain closely related to that of the transcription factor Sp1. In vitro, DNA binding studies show that it binds to the GC box, a DNA motif present in th...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1006/dbio.2000.9878
更新日期：2000-11-15 00:00:00
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journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/j.ydbio.2007.07.013
更新日期：2007-09-15 00:00:00
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journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/j.ydbio.2014.09.001
更新日期：2014-11-01 00:00:00
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journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1006/dbio.2002.0653
更新日期：2002-06-15 00:00:00
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journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1006/dbio.1996.0280
更新日期：1996-11-25 00:00:00
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journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1006/dbio.1996.8437
更新日期：1997-01-01 00:00:00
abstract：:In the vertebrate head, crucial parts of the sense organs and sensory ganglia develop from special regions, the cranial placodes. Despite their cellular and functional diversity, they arise from a common field of multipotent progenitors and acquire distinct identity later under the influence of local signalling. Here ...
journal_title：Developmental biology
pub_type： 杂志文章,评审
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更新日期：2012-10-01 00:00:00
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journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/j.ydbio.2008.10.014
更新日期：2009-01-01 00:00:00
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journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1006/dbio.1999.9254
更新日期：1999-05-15 00:00:00
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journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/0012-1606(86)90155-7
更新日期：1986-08-01 00:00:00
abstract：:Cell signaling pathways, such as Wnt, Hedgehog (Hh), Notch, and Hippo, are essential for embryogenesis, organogenesis, and tissue homeostasis. In this study, we analyzed 415 genes involved in these pathways in the allotetraploid frog, Xenopus laevis. Most genes are retained in two subgenomes called L and S (193 homeol...
journal_title：Developmental biology
pub_type： 杂志文章
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更新日期：2017-06-15 00:00:00
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journal_title：Developmental biology
pub_type： 杂志文章
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更新日期：2004-04-15 00:00:00
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journal_title：Developmental biology
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journal_title：Developmental biology
pub_type： 杂志文章
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更新日期：2004-03-01 00:00:00
abstract：:This manuscript reports on the limb malformations and axial skeleton alterations found in legless fetuses and their heterozygote and wild-type littermates transplacentally exposed to all-trans-retinoic acid via a single intraperitoneal injection on Day 7, 8, 9, 9.5, 10, 10.5, or 11 of gestation. The most surprising as...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1006/dbio.1994.1198
更新日期：1994-07-01 00:00:00
abstract：:One way to better understand the molecular mechanisms involved in the construction of a nervous system is to identify the downstream effectors of major regulatory proteins. We previously showed that Engrailed (EN) and Gooseberry-Neuro (GsbN) transcription factors act in partnership to drive the formation of posterior ...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/j.ydbio.2017.10.018
更新日期：2017-12-15 00:00:00
abstract：:The endoderm of C. elegans arises entirely from a single progenitor cell, the E blastomere, whose identity is specified by GATA type transcription factors, including END-1. In response to an inductive interaction mediated through Wnt/MAP kinase signaling pathways, POP-1, a Lef/Tcf-type transcription factor, restricts ...
journal_title：Developmental biology
pub_type： 杂志文章
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更新日期：2009-03-01 00:00:00
abstract：:To investigate the mechanism by which the hormone 17 alpha,20 beta-dihydroxy-4-pregnen-3-one(17 alpha,20 beta-DP) acts on a receptor on the external surface of rainbow trout oocytes to induce maturation, the interaction between 17 alpha,20 beta-DP receptors and G-proteins was examined. Pertussis toxin (PT) catalyzed t...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1006/dbio.1994.1341
更新日期：1994-12-01 00:00:00
abstract：:The finding that retinoic acid (RA) has major effects on pattern formation in developing chick limbs has led to the conclusion that RA plays a central role in the normal development of the limb. In addition, it has been demonstrated that treatment with exogenous RA leads to changes in expression of homeobox-containing...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1006/dbio.1994.1301
更新日期：1994-11-01 00:00:00
abstract：:Mitogen-activated protein kinases (MAPKs) are important regulators of many cellular processes. In mammalian testes, these kinases are involved in controlling cell division, differentiation, survival and death, and are therefore critical to spermatogenesis. Recent studies have also illustrated their involvement in junc...
journal_title：Developmental biology
pub_type： 杂志文章,评审
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更新日期：2005-10-01 00:00:00
abstract：:The canonical, beta-catenin-dependent Wnt pathway is a crucial player in the early events of Xenopus development. Dorsal axis formation and mesoderm patterning are accepted effects of this pathway, but the regulation of expression of genes involved in mesoderm specification is not. This conclusion is based largely on ...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1006/dbio.2002.0786
更新日期：2002-10-01 00:00:00
abstract：:Syndecan, a cell surface proteoglycan, binds multiple extracellular ligands, and is developmentally regulated in epithelial and mesenchymal tissues. The branching morphogenesis of embryonic lung is dependent on epithelial-mesenchymal interactions and, based on studies with inhibitors, on proteoglycan synthesis. To ass...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/0012-1606(91)90286-c
更新日期：1991-10-01 00:00:00
abstract：:Tube formation is a widespread process during organogenesis. Specific cellular behaviors participate in the invagination of epithelial monolayers that form tubes. However, little is known about the evolutionary mechanisms of cell assembly into tubes during development. In Caenorhabditis elegans, the detailed step-to-s...
journal_title：Developmental biology
pub_type： 杂志文章
doi：10.1016/j.ydbio.2003.10.029
更新日期：2004-02-15 00:00:00
