First published online June 8, 2005
Development 132, 1301e (2005)
© The Company of Biologists Limited
Hdac1 - a dual switch for retinal neurogenesis
Neurogenesis, the switch from proliferation to differentiation, is a poorly
understood event in the developing nervous system. Now, on
p. 3027, Yamaguchi et
al. reveal that in zebrafish, histone deacetylase 1 (Hdac1) regulates retinal
neurogenesis by suppressing the Wnt and Notch signalling pathways, which
promote retinal proliferation and inhibit retinal neurogenesis, respectively.
The researchers describe add (ascending and descending), a
zebrafish mutant in which retinal progenitors continue to proliferate. Hdac1,
they show, is encoded by the add gene, and manipulating Hdac1 levels
in normal zebrafish embryos alters the ratio of proliferating to
differentiating cells in the retina. The researchers also report that the Wnt
and Notch signalling pathways are activated in add mutant retinas,
and that their blockade suppresses cell proliferation and encourages
differentiation. Thus, they conclude, Hdac1 acts as a dual switch to control
zebrafish retinal
neurogenesis.
Related articles in Development:
- Histone deacetylase 1 regulates retinal neurogenesis in zebrafish by suppressing Wnt and Notch signaling pathways
- Masahiro Yamaguchi, Noriko Tonou-Fujimori, Atsuko Komori, Ryu Maeda, Yasuhiro Nojima, Haichang Li, Hitoshi Okamoto, and Ichiro Masai
Development 2005 132: 3027-3043.
[Abstract]
[Full Text]