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Related Experiment Video

Updated: Jun 25, 2026

Production of Nurr-1 Specific Polyclonal Antibodies Free of Cross-reactivity Against Its Close Homologs, Nor1 and Nur77
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Nurr1 expression and its modulation in microglia.

Xiaolan Fan1, Guangrui Luo, Ming Ming

  • 1Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Science, Shanghai Jiao Tong University School of Medicine, Shanghai, China.

Neuroimmunomodulation
|February 28, 2009
PubMed
Summary
This summary is machine-generated.

Nurr1 is expressed in microglia and its levels increase upon activation. Signaling pathways including ERK, JNK, and PI3K/Akt modulate this response, influencing Nurr1 translocation.

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Area of Science:

  • Neuroscience
  • Immunology

Background:

  • Nurr1 is a crucial transcription factor for central nervous system dopaminergic cell development.
  • Nurr1 is predominantly found in neurons, with its role in other central nervous system cells less understood.

Purpose of the Study:

  • To investigate the expression and regulation of Nurr1 in cultured microglia.
  • To explore the signaling pathways involved in Nurr1 modulation in microglia.

Main Methods:

  • Nurr1 expression was analyzed using RT-PCR, Western blot, and immunofluorescence in primary mouse microglia.
  • Microglia were activated with lipopolysaccharide (LPS).
  • Specific pathway inhibitors (ERK, JNK, P38 MAPK, PI3K/Akt) were used to assess their role in Nurr1 modulation.

Main Results:

  • Nurr1 was detected in both the cytoplasm and nucleus of microglia.
  • LPS stimulation significantly upregulated Nurr1 expression.
  • Inhibitors of ERK, JNK, and PI3K/Akt partially blocked the LPS-induced increase in Nurr1, while P38 MAPK inhibition had no effect.
  • ERK inhibition also reduced Nurr1 translocation from the cytoplasm to the nucleus.

Conclusions:

  • Nurr1 is expressed in cultured mouse microglia.
  • Microglial activation by LPS increases Nurr1 expression and promotes its nuclear translocation.
  • The ERK, JNK, and PI3K/Akt signaling pathways play a role in modulating Nurr1 expression and localization in activated microglia.