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Related Experiment Video

Updated: Jun 25, 2026

Dissecting Cell-Autonomous Function of Fragile X Mental Retardation Protein in an Auditory Circuit by In Ovo Electroporation
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Frmd7 expression in developing mouse brain.

J Self1, H M Haitchi, H Griffiths

  • 1Southampton Eye Unit, Southampton General Hospital, UK.

Eye (London, England)
|March 7, 2009
PubMed
Summary
This summary is machine-generated.

Congenital idiopathic nystagmus (CIN) is linked to FRMD7 mutations. This study found Frmd7 gene expression is low in most tissues but significantly higher in the developing mouse brain, suggesting a key role in neural development.

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Area of Science:

  • Genetics
  • Developmental Biology
  • Neuroscience

Background:

  • Mutations in the FERM domain containing 7 (FRMD7) gene are a significant cause of congenital idiopathic nystagmus (CIN).
  • Existing data indicate low expression levels of FRMD7 across tissues.
  • This study investigates the expression profile of the murine homologue, Frmd7, during development.

Purpose of the Study:

  • To characterize the expression pattern of Frmd7 in murine heart, lung, and brain tissues throughout development.
  • To identify potential tissue-specific roles of Frmd7 based on its expression profile.

Main Methods:

  • Quantitative real-time PCR was used to measure Frmd7 mRNA expression.
  • cDNA was analyzed from MF-1 mouse tissues (heart, lung, brain) across 12 developmental time points (embryonic days 11-19, postnatal days 1 and 8, and adult).
  • Expression levels were normalized using Gapdh and Actb reference genes.

Main Results:

  • Frmd7 expression was consistently low across all examined tissues, aligning with previous findings.
  • Heart and lung tissues showed minimal Frmd7 expression, with a slight increase observed only in adult samples.
  • Brain tissue exhibited higher Frmd7 expression throughout development, with a notable surge at embryonic day 18. No gender-specific expression differences were detected.

Conclusions:

  • Low Frmd7 expression across tissues suggests a potential role in multiple tissue types.
  • Elevated expression and a distinct developmental peak in the brain indicate a specialized function in neural development.
  • The temporal expression pattern of Frmd7 in the brain mirrors genes involved in synapse formation and axon guidance, suggesting a role in these processes.