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- W1978596328 abstract "Transforming growth factor alpha (TGFα) interacts with the epidermal growth factor receptor (EGF-R) to produce its biological effects. TGFα induces the proliferation and differentiation of central nervous system (CNS) astrocytes and pluripotent stem cells, as well as the survival and differentiation of postmitotic CNS neurons. Both TGFα and EGF-R have been localized to the postnatal CNS. As the majority of CNS neuronal proliferation and migration occurs antenatally, we have examined the ontogeny of TGFα and EGF-R in the embryonic rat brain by in situ hybridization. EGF-R mRNA was expressed in the brain as early as embryonic day 11 (E11; the earliest age examined). It was initially detected in the midbrain, with subsequent expression first in multiple germinal zones, followed by expression in numerous cells throughout the brain. In many brain areas, EGF-R mRNA appeared in germinal centers during the later stages of neurogenesis and the early stages of gliogenesis. In the midbrain, the distribution of EGF-R mRNA overlapped extensively with that of tyrosine hydroxylase mRNA, suggesting that fetal dopaminergic neurons express EGF-R. Immunocytochemistry was used to demonstrate the presence of EGF-R-immunoreactive protein in brain areas that expressed EGF-R mRNA on E15 and E20. The expression of TGFα in many brain structures preceded that of EGF-R mRNA. TGFα mRNA was distributed throughout many non-germinal centers of the brain on E12 and later. Some brain areas, such as the external granule cell layer of the cerebellum, expressed EGF-R, but not TGFα mRNA. Northern blot analysis demonstrated that mRNA species for both TGFα and EGF-R were similar in embryos and adults. These data indicate that TGFα and EGF-R are positioned to have a role in the genesis, differentiation, migration, or survival of numerous cell populations in the embryonic brain. J. Comp. Neurol. 380:243–261, 1997. © 1997 Wiley-Liss, Inc." @default.
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- W1978596328 date "1997-04-07" @default.
- W1978596328 modified "2023-10-12" @default.
- W1978596328 title "Prenatal ontogeny of the epidermal growth factor receptor and its ligand, transforming growth factor alpha, in the rat brain" @default.
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- W1978596328 doi "https://doi.org/10.1002/(sici)1096-9861(19970407)380:2<243::aid-cne7>3.0.co;2-3" @default.
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