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A MicroRNA gene is hosted in an intron of a schizophrenia-susceptibility gene

Yanglong Zhu1, Ted Kalbfleisch, Mark D Brennan

  • 1Department of Biochemistry and Molecular Biology, University of Louisville, United States.

Schizophrenia Research
|March 7, 2009
PubMed

Insights

MicroRNA-346 (miRNA-346) and its host gene, GRID1, show reduced expression in schizophrenia patients. This suggests a potential role for miRNA-346 in schizophrenia susceptibility.

Area of Science:

  • Neuroscience
  • Genetics
  • Molecular Biology

Background:

  • Schizophrenia (SZ) is a complex neuropsychiatric disorder affecting approximately 1% of adults.
  • Numerous genes are linked to SZ susceptibility, with microRNAs (miRNAs) emerging as key regulators.
  • miRNAs, small RNA molecules, regulate gene expression by targeting messenger RNAs (mRNAs).

Purpose of the Study:

  • To investigate the potential role of microRNA-346 (miRNA-346) in schizophrenia.
  • To examine the relationship between miRNA-346 and its host gene, glutamate receptor ionotropic delta 1 (GRID1), in SZ.
  • To analyze the expression levels and correlation of miRNA-346 and GRID1 in the brains of SZ patients.

Main Methods:

  • Utilized quantitative real-time PCR to measure expression levels of miRNA-346 and GRID1.
  • Analyzed brain RNA samples from the Stanley Array Collection.
  • Compared expression and correlation between SZ patients, bipolar patients, and normal controls.

Main Results:

  • miRNA-346 was found to target SZ susceptibility genes more frequently than expected.
  • Expression levels of both miRNA-346 and GRID1 were significantly lower in SZ patients compared to normal controls.
  • The correlation between miRNA-346 and GRID1 expression was weaker in SZ patients than in controls.

Conclusions:

  • This study highlights the potential involvement of miRNA-346 in the pathophysiology of schizophrenia.
  • Reduced expression and altered correlation of miRNA-346 and GRID1 may contribute to SZ susceptibility.
  • miRNAs represent a promising area for understanding and potentially treating schizophrenia.

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