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  • 1
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    A cellular framework for gut-looping morphogenesis in zebrafish (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-10-25
    Description: Many vertebrate organs adopt asymmetric positions with respect to the midline, but little is known about the cellular changes and tissue movements that occur downstream of left-right gene expression to produce this asymmetry. Here, we provide evidence that the looping of the zebrafish gut results from the asymmetric migration of the neighboring lateral plate mesoderm (LPM). Mutations that disrupt the epithelial structure of the LPM perturb this asymmetric migration and inhibit gut looping. Asymmetric LPM migration still occurs when the endoderm is ablated from the gut-looping region, suggesting that the LPM can autonomously provide a motive force for gut displacement. Finally, reducing left-sided Nodal activity randomizes the pattern of LPM migration and gut looping. These results reveal a cellular framework for the regulation of organ laterality by asymmetrically expressed genes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Horne-Badovinac, Sally -- Rebagliati, Michael -- Stainier, Didier Y R -- New York, N.Y. -- Science. 2003 Oct 24;302(5645):662-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Biophysics, Programs in Developmental Biology, Genetics, and Human Genetics, University of California, San Francisco, CA 94143, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14576439" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Body Patterning ; Cell Movement ; Cues ; Endoderm/physiology ; *Gene Expression Regulation, Developmental ; Guanylate Kinase ; Homeodomain Proteins/genetics/physiology ; Intestines/*embryology ; Isoenzymes ; Mesoderm/cytology/physiology ; Morphogenesis ; Mutation ; *Nuclear Proteins ; Nucleoside-Phosphate Kinase/genetics/metabolism ; Oligonucleotides, Antisense ; Phenotype ; Protein Kinase C/genetics/physiology ; Transcription Factors/genetics/physiology ; Zebrafish/*embryology/genetics ; Zebrafish Proteins/genetics/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    UDP-glucose dehydrogenase required for cardiac valve formation in zebrafish (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-09-05
    Description: Cardiac valve formation is a complex process that involves cell signaling events between the myocardial and endocardial layers of the heart across an elaborate extracellular matrix. These signals lead to marked morphogenetic movements and transdifferentiation of the endocardial cells at chamber boundaries. Here we identify the genetic defect in zebrafish jekyll mutants, which are deficient in the initiation of heart valve formation. The jekyll mutation disrupts a homolog of Drosophila Sugarless, a uridine 5'-diphosphate (UDP)-glucose dehydrogenase required for heparan sulfate, chondroitin sulfate, and hyaluronic acid production. The atrioventricular border cells do not differentiate from their neighbors in jekyll mutants, suggesting that Jekyll is required in a cell signaling event that establishes a boundary between the atrium and ventricle.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Walsh, E C -- Stainier, D Y -- HL54737/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2001 Aug 31;293(5535):1670-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Biophysics, Programs in Developmental Biology, Genetics and Human Genetics, University of California, San Francisco, CA 94143-0448, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11533493" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Antisense Elements (Genetics) ; Body Patterning ; Bone Morphogenetic Proteins/genetics ; Endocardium/embryology/metabolism ; Female ; Gene Expression ; Glycosaminoglycans/metabolism ; Heart/*embryology ; Heart Valves/cytology/*embryology/enzymology/metabolism ; Male ; Molecular Sequence Data ; Morphogenesis ; Mutation ; Myocardium/cytology/metabolism ; Phenotype ; Physical Chromosome Mapping ; Signal Transduction ; Uridine Diphosphate Glucose Dehydrogenase/*genetics/*metabolism ; Zebrafish/*embryology/genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
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    PAPER CURRENT
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