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Vertebrate neural induction

A Hemmati-Brivanlou¹, D Melton

¹Center for Neurosciences, The Rockefeller University, New York, New York 10021-6399, USA.

Annual Review of Neuroscience

|January 1, 1997

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Vertebrate ectoderm cells decide between neural or epidermal fates. Neural induction involves secreted factors acting through inhibitory control and derepression, as detailed in this review.

Area of Science:

Developmental biology
Cell fate determination
Molecular signaling

Background:

Early vertebrate development involves ectoderm cells differentiating into neural or epidermal lineages.
Neural induction, a fundamental process, was discovered decades ago and is crucial for nervous system formation.
Recent Xenopus laevis studies identified secreted factors mediating neural induction.

Purpose of the Study:

To review factors involved in neural fate specification.
To discuss the mechanism of neural induction within the default model.
To highlight the role of inhibitory control and derepression in neuralization.

Main Methods:

Literature review of molecular analyses in Xenopus laevis embryos.
Focus on secreted factors with neural-inducing capabilities.

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Analysis of the inhibitory control and derepression mechanisms.

Main Results:

Several secreted factors possess direct neural-inducing ability.
Neural induction mechanisms are largely under inhibitory control.
Derepression plays a key role in the neuralization process.

Conclusions:

The default model of neural induction provides a framework for understanding ectoderm cell fate.
Understanding these factors and mechanisms is vital for comprehending vertebrate development.
Inhibitory control is a central theme in specifying neural fate.