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During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In...
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Intrinsic regulations in neural fate commitment.

Ke Tang1, Guangdun Peng, Yunbo Qiao

  • 1Institute of Life Science, Nanchang University, Nanchang, Jiangxi, 330031, China.

Development, Growth & Differentiation
|February 25, 2015
PubMed
Summary
This summary is machine-generated.

Neural fate commitment involves intrinsic programs and extracellular signals. Key transcription factors and epigenetic modifications regulate early nervous system development.

Keywords:
embryonic stem cellepigenetic modificationextracellular signalsneural fate commitmenttranscription factor

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Area of Science:

  • Developmental Biology
  • Neuroscience
  • Genetics

Background:

  • Neural fate commitment is a critical early embryonic event where ectodermal cells develop neural fates, excluding epidermal or mesodermal lineages.
  • Extracellular signaling pathways, including bone morphogenetic proteins (BMPs), fibroblast growth factors (FGFs), wingless/int class proteins (WNTs), and Nodal, are crucial for neural plate specification.

Purpose of the Study:

  • To review recent findings on the intrinsic regulatory mechanisms governing neural fate commitment.
  • To highlight the roles of intracellular molecules, including transcription factors and epigenetic modifiers, in neural development.

Main Methods:

  • Review of existing literature on neural fate commitment in mouse models and pluripotent embryonic stem cells.
  • Analysis of studies focusing on transcriptional factors (Sox2, Zfp521, Sip1, Pou3f1) and epigenetic modifications (histone and DNA methylation/acetylation).

Main Results:

  • Intrinsic programs, mediated by specific transcription factors, are essential for initiating the nervous system.
  • Epigenetic modifications, such as histone and DNA methylation/demethylation and acetylation/deacetylation, play a significant role in modulating neural fate.
  • Neural fate commitment is ensured by the coordinated action of both extracellular signals and intracellular molecules.

Conclusions:

  • Understanding the intrinsic regulatory machinery provides deeper insights into neural development.
  • The interplay between extracellular and intracellular factors is key to ensuring proper neural fate commitment during embryogenesis.