A Transcriptomic Dataset of Embryonic Murine Telencephalon of Fmr1-Deficient Mice

Area of Science:

• Neuroscience
• Genetics
• Developmental Biology

Background:

• Fragile X syndrome (FXS) is a genetic neurodevelopmental disorder linked to FMR1 gene mutations.
• FXS is associated with autistic behaviors and brain abnormalities, exhibiting significant sex differences.
• The underlying mechanisms driving these sex differences in brain development due to FMR1 deficiency are not well understood.

Purpose of the Study:

• To investigate sex-specific gene expression patterns in the developing brain of Fmr1-knockout mice.
• To identify genetic factors contributing to sex differences in neurodevelopmental disorders.

Main Methods:

• Bulk RNA sequencing was performed on telencephalon samples from male and female Fmr1-knockout mice at embryonic day 14.5.
• Clustering analysis was used to identify gene expression differences influenced by Fmr1 gene dosage and sex.

Main Results:

• Gene expression profiles revealed distinct patterns influenced by both Fmr1 gene dosage and sex.
• A majority of transcripts were shared between sexes, but a notable subset of genes showed sex-unique expression.
• The embryonic period is critical for observing sex-dependent genetic factors.

Conclusions:

• Fmr1 deficiency impacts gene expression in a sex-dependent manner during early brain development.
• Understanding embryonic gene expression is crucial for deciphering sex differences in FXS.
• This research provides insights into the genetic basis of sex-specific neurodevelopmental outcomes in FXS.