کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2176765 1094578 2014 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Directional Cell Migration, but Not Proliferation, Drives Hair Placode Morphogenesis
ترجمه فارسی عنوان
مهاجرت سلولی جهت، اما گسترش تسریع نشده، موجب ریزش مو می شود
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی بیولوژی سلول
چکیده انگلیسی


• Changes in multiple cellular processes are associated with hair placode formation
• Committed hair placode cells show little proliferation during placode morphogenesis
• Placode formation is driven by centripetal cell migration and cell intercalation
• Eda/NF-κB and Wnt/β-cat pathways suppress proliferation but enhance motility

SummaryEpithelial reorganization involves coordinated changes in cell shapes and movements. This restructuring occurs during formation of placodes, ectodermal thickenings that initiate the morphogenesis of epithelial organs including hair, mammary gland, and tooth. Signaling pathways in ectodermal placode formation are well known, but the cellular mechanisms have remained ill defined. We established imaging methodology for live visualization of embryonic skin explants during the first wave of hair placode formation. We found that the vast majority of placodal cells were nonproliferative throughout morphogenesis. We show that cell compaction and centripetal migration are the main cellular mechanisms associated with hair placode morphogenesis and that inhibition of actin remodeling suppresses placode formation. Stimulation of both ectodysplasin/NF-κB and Wnt/β-catenin signaling increased cell motility and the number of cells committed to placodal fate. Thus, cell fate choices and morphogenetic events are controlled by the same molecular pathways, providing the framework for coordination of these two processes.

Graphical AbstractFigure optionsDownload high-quality image (182 K)Download as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: - Volume 28, Issue 5, 10 March 2014, Pages 588–602
نویسندگان
, , , , , , , ,