TY  - JOUR
A1  - Lillien, Laura E.
A1  - Sendtner, Michael
A1  - Rohrer, Hermann
A1  - Hughes, Simon M.
A1  - Raff, Martin C.
T1  - Type-2 Astrocyte Development in Rat Brain Cultures is initiated by a CNTF-like protein produced by type-1 astrocytes
N2  - No abstract available
Y1  - 1988
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-31708
ER  - 
TY  - JOUR
A1  - Hughes, Simon M.
A1  - Lillien, Laura E.
A1  - Raff, Martin C.
A1  - Rohrer, Hermann
A1  - Sendtner, Michael
T1  - Ciliary neurotrophic factor induces type-2 astrocyte differentiation in culture
N2  - We have been studying a population of bipotential glial progenitor cells in the perinatal rat optic nerve and brain in an attempt to understand how cells choose between alternative fates in the developing mammalian central nervous system (CNS). This cell population gives rise initially to oligodendrocytes and then to type-2 astrocytes1 both of which apparently collaborate in sheathing axons in the CNS2,3. In vitro studies suggest that oligodendrocyte differentiation is the constitutive pathway of development for the oligodendrocyte-type-2-astrocyte (O-2A) progenitor cell4,5, whereas type-2 astrocyte differentiation depends on a specific inducing protein6. This protein is present in the developing optic nerve when type-2 astrocytes are differentiating and can induce 0-2A progenitor cells in vitro to express glial fibrillary acidic protein (GFAP)6, a marker of astrocyte differentiation7. Here we show that the type-2-astrocyte-inducing protein is similar or identical to ciliary neutrotrophic factor (CNTF)8,9, which promotes the survival of some types of peripheral neurons in vitro8, including ciliary ganglion neurons8,10. This suggests that CNTF, in addition to its effect on neurons, may be responsible for triggering type-2 astrocyte differentiation in the developing CNS.
Y1  - 1988
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-42660
ER  - 
TY  - JOUR
A1  - Ernsberger, Uwe
A1  - Sendtner, Michael
A1  - Rohrer, Hermann
T1  - Proliferation and differentiation of embryonic chick sympathetic neurons: Effects of ciliary neurotropic factor.
N2  - At early developmental stages (embryonic day 7, E7), chick paravertebral sympathetic ganglia contain a cell population that divides in culture while expressing various neuronal properties. In an attempt to identify factors that control neuronal proliferation, we found that ciliary neurotrophic factor (CNTF) specifically inhibits the proliferation of those cells expressing neuronal markers. In addition, CNTF affects the differentiation of sympathetic ganglion cells by inducing the expression of vasoactive intestinal peptide immunoreactivity (VIP-IR). After 1 day in culture, tyrosine hydroxylase immunoreactivity (TH-I R) was expressed by about 86% of the cells whereas VIP-IR was virtually absent. In the presence of CNTF, 50%-60% of the cells expressed VIP-IR after 4 days in culture; however, none of the cells expressed VIP-IR in the absence of CNTF. These results, and the demonstration of cells that express both VIP and TH-IR, indicate that VIP is induced in cells that initially express tyrosine hydroxylase. The findings suggest a potential role for CNTF as a factor affecting the proliferation and differentiation of developing sympathetic neurons.
Y1  - 1989
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-31721
ER  -