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GDF11 controls the timing of progenitor cell competence in developing retina
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J. Kim, H.H. Wu, A.D. Lander, K.M. Lyons, M.M. Matzuk, and A.L. Calof GDF11 controls the timing of progenitor cell competence in developing retina Science 308 2005 1927 1930 Previous studies proposed that retinal ganglion cells regulated their own numbers through a feedback mechanism [ 46,47 ]. Analysis of Gdf11 knockout mice reveals that this member of the TGFβ family plays an important role in the control of RGC cell number by regulating the duration of the expression of genes crucial for progenitor cell fate determination. This mechanism is different from that used by GDF11 in the olfactory epithelium. There, neuronal GDF11 controls neurogenesis by regulating progenitor cell proliferation, an interesting twist to the story.
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(2005)
Science
, vol.308
, pp. 1927-1930
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Kim, J.1
Wu, H.H.2
Lander, A.D.3
Lyons, K.M.4
Matzuk, M.M.5
Calof, A.L.6
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49
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28844463064
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Retinal ganglion cell-derived sonic hedgehog locally controls proliferation and the timing of RGC development in the embryonic mouse retina
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Y. Wang, G.D. Dakubo, S. Thurig, C.J. Mazerolle, and V.A. Wallace Retinal ganglion cell-derived sonic hedgehog locally controls proliferation and the timing of RGC development in the embryonic mouse retina Development 132 2005 5103 5113 This study describes the effects of the conditional ablation of Shh expression in the peripheral retina of mouse embryos. On the basis of their results the authors propose that in the mouse retina Shh signalling is required to maintain progenitor proliferation and to control the timing of RGC development. These effects are different from those observed in zebrafish where Shh signalling drives cell cycle exit and RGC development [ 31,41,43,50 ]. Species-specific differences in the timing of neurogenesis might be an explanation for this discrepancy.
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(2005)
Development
, vol.132
, pp. 5103-5113
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Wang, Y.1
Dakubo, G.D.2
Thurig, S.3
Mazerolle, C.J.4
Wallace, V.A.5
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50
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22144444555
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Shh directs cell-cycle exit by activating p57Kip2 in the zebrafish retina
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A. Shkumatava, and C.J. Neumann Shh directs cell-cycle exit by activating p57Kip2 in the zebrafish retina EMBO Rep 6 2005 563 569
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(2005)
EMBO Rep
, vol.6
, pp. 563-569
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Shkumatava, A.1
Neumann, C.J.2
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