Abstract:
:The origin and development of mouse kidney vasculature were examined in chorioallantoic grafts of early kidney rudiments and of experimentally induced explants of separated metanephric mesenchymes. Whole kidney rudiments developed into advanced stages, expressed the segment-specific antigenic markers of tubules and the polyanionic coat of the glomeruli. In contrast to development in vitro, these grafts regularly showed glomeruli with an endothelial component and a basement membrane expressing type IV collagen and laminin. The glomerular endothelial cells in these grafts were shown to carry the nuclear structure of the host. This confirms the outside origin of these cells and the true hybrid nature of the glomeruli. When in vitro induced mesenchymes were grafted on chorioallantoic membranes, abundant vascular invasion was regularly found but properly vascularized glomeruli were exceptional. Uninduced, similarly grafted mesenchymal explants remained avascular as did the undifferentiated portions of partially induced mesenchymal blastemas. It is concluded that the stimulation of the host endothelial cells to invade into the differentiating mesenchyme requires the morphogenetic tissue interaction between the ureter bud and the mesenchyme. The induced metanephric cells presumably start to produce chemoattractants for endothelial cells at an early stage of differentiation. Kidney development thus seems to require an orderly, synchronized development of the three cell lineages: the branching ureter, the induced, tubule-forming mesenchyme, and the invading endothelial cells of outside origin.
journal_name
Dev Bioljournal_title
Developmental biologyauthors
Sariola H,Ekblom P,Lehtonen E,Saxén Ldoi
10.1016/0012-1606(83)90180-xsubject
Has Abstractpub_date
1983-04-01 00:00:00pages
427-35issue
2eissn
0012-1606issn
1095-564Xpii
0012-1606(83)90180-Xjournal_volume
96pub_type
杂志文章abstract::The development of asymmetric patterns along biologically relevant axes is a hallmark of many vertebrate organs or structures. One example is the sensory epithelium of the mammalian auditory system. Two distinct types of mechanosensory hair cells (inner and outer) and at least six types of associated supporting cells ...
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更新日期:2008-05-01 00:00:00
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pub_type: 杂志文章
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更新日期:2016-01-01 00:00:00
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pub_type: 杂志文章,评审
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