Abstract:
:We have cloned a partial cDNA of chicken glial cell line-derived neurotrophic factor (GDNF) and systematically examined its expression pattern as well as that of GDNF-binding components (GDNF family receptor alpha-1 and 2: GFRalpha-1 and 2) and a common signal transduction receptor (c-ret protooncogene: RET) during very early developmental stages. In addition, we also examined the expression pattern of an apparent avian-specific binding component, GFRalpha-4. The cloned chicken cDNA for GDNF had approximately 80% homology to mammalian counterparts. The expression of GDNF mRNA occurred in many spatially and temporally discrete regions such as the intermediate mesoderm, the floor plate of the spinal cord, pharyngeal endoderm contacting the epibranchial placodes, distal ganglia of cranial nerves, subpopulations of mesenchyme cells in the craniofacial region, and in the mesodermal wall of the digestive tract. Both a GDNF receptor signal transduction component (RET) and a binding component (GFRalpha-1 or GFRalpha-2) were independently expressed in nearby interacting tissues such as the somites, peripheral and central nervous system, and mesenchyme cells in the craniofacial region. These observations suggest that possible combinations of novel unidentified receptors acting with RET or with GFRalphas may mediate GDNF-derived signals and indicate that GDNF or other family members may have previously unidentified actions in early organogenesis in the chick embryo.
journal_name
Dev Bioljournal_title
Developmental biologyauthors
Homma S,Oppenheim RW,Yaginuma H,Kimura Sdoi
10.1006/dbio.1999.9543subject
Has Abstractpub_date
2000-01-01 00:00:00pages
121-37issue
1eissn
0012-1606issn
1095-564Xpii
S0012-1606(99)99543-Xjournal_volume
217pub_type
杂志文章abstract::Here we describe a novel set of peptidergic neurons conserved throughout all developmental stages in the Drosophila central nervous system (CNS). We show that a small complement of 28 apterous-expressing cells (Ap-let neurons) in the ventral nerve cord (VNC) of Drosophila larvae co-express numerous gene products. The ...
journal_title:Developmental biology
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