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Myocyte-specific enhancer binding factor 2C expression in human brain development

D Leifer1, J Golden, N W Kowall

  • 1Department of Neurology, Massachusetts General Hospital, Boston.

Neuroscience
|December 1, 1994
PubMed
Summary
This summary is machine-generated.

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Myocyte-specific enhancer binding factor 2C (MEF2C) is expressed in the human brain and plays a role in neuronal differentiation. Its expression patterns change from fetal to adult stages, particularly in the cerebral cortex.

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Developmental Biology

Background:

  • Myocyte-specific enhancer binding factor 2C (MEF2C) is a transcription factor known to be expressed in muscle and brain.
  • MEF2C binds to the myocyte-specific enhancer binding factor 2 (MEF2) regulatory element, activating gene transcription.

Purpose of the Study:

  • To investigate the expression patterns of MEF2C in the developing and mature human brain.
  • To elucidate the role of MEF2C in neuronal differentiation and cortical development.

Main Methods:

  • Utilized an antiserum against MEF2C (amino acids 140-238) for immunodetection.
  • Employed Western blotting to analyze MEF2C protein molecular weight in fetal and adult brain extracts.
  • Performed immunohistochemical analysis of MEF2C distribution in human brain tissue across different developmental stages.

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Main Results:

  • MEF2C protein exhibited distinct molecular weights in fetal (similar to transfected COS cells) versus adult brain.
  • In the developing cerebral cortex, MEF2C was initially present throughout the cortical plate and later showed preferential expression in layers II, IV, and VI.
  • MEF2C immunoreactivity was detected in various brain regions including the entorhinal cortex, hippocampus, amygdala, and cerebellum.

Conclusions:

  • MEF2C expression is dynamic during human brain development, with altered molecular weight in adulthood.
  • MEF2C is implicated in postmitotic neuronal differentiation, particularly in the development of specific neocortical layers.
  • The findings suggest a broader role for MEF2C in the differentiation of diverse neuronal populations beyond the cerebral cortex.