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The Journal of Neuroscience, November 1, 1999, 19(21):9364-9373
Neuralization of the Xenopus Embryo by Inhibition of
p300/ CREB-Binding Protein Function
Yoichi
Kato1, 2,
Yang
Shi3, and
Xi
He1, 2
1 Division of Neuroscience, Children's Hospital, and
Departments of 2 Neurology and 3 Pathology,
Harvard Medical School, Boston, Massachusetts 02115
p300/ CREB-binding protein (CBP) is a transcriptional coactivator
for a plethora of transcription factors and plays critical roles in
signal transduction pathways. We report that the inhibition of p300/CBP
function in the Xenopus embryo abolishes non-neural tissue formation and, strikingly, initiates neural induction and primary neurogenesis in the entire embryo. The observed neuralization is achieved in the absence of anterior or posterior gene expression, suggesting that neural fate activation and anterior patterning may
represent distinct molecular events. We further demonstrate that the
neuralizing and anteriorizing activities of chordin and noggin are
separable properties of these neural inducers. This study reveals that
all embryonic cells possess intrinsic neuralizing capability and that
p300/CBP function is essential for embryonic germ layer formation and
neural fate suppression during vertebrate embryogenesis.
Key words:
p300; CBP (CREB-binding protein); neural induction; neuralization; transcription suppression; germ layer formation; embryogenesis; Xenopus
Copyright © 1999 Society for Neuroscience 0270-6474/99/19219364-10$05.00/0
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