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Genes Associated with Altered Brain Structure and Function in Obstructive Sleep Apnea.

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Obstructive sleep apnea (OSA) alters brain structure and function, impacting areas like the hippocampus and amygdala. Genetic analysis reveals links between these brain changes and synaptic activity.

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Area of Science:

  • Neuroimaging
  • Genetics
  • Sleep Medicine

Background:

  • Obstructive sleep apnea (OSA) is linked to brain structure and function abnormalities.
  • The underlying genetic mechanisms driving these neurological changes in OSA are not well understood.
  • Investigating the interplay between sleep, cognition, genetics, and brain alterations is crucial.

Purpose of the Study:

  • To explore the relationship between sleep characteristics, cognitive impairments, genetic factors, and brain structure/function in OSA patients.
  • To identify genetic mechanisms associated with neuroimaging findings in OSA.

Main Methods:

  • Structural and resting-state functional MRI (fMRI) were used to assess brain structure and activity.
  • Voxel-based morphology (VBM) and amplitude of low-frequency fluctuations (ALFF) analyses were performed.
  • Transcriptome-neuroimaging spatial correlation analyses integrated gene expression data with neuroimaging findings.

Main Results:

  • OSA patients showed increased ALFF in the hippocampus, amygdala, caudate, and cerebellum, and decreased ALFF in the precuneus.
  • VBM analysis indicated increased gray matter volume (GMV) in the right inferior parietal lobe in OSA patients.
  • Functional enrichment analysis linked genes associated with ALFF and GMV changes to gated channel activity, synaptic transmission, and glutamatergic synapses.

Conclusions:

  • OSA is associated with distinct alterations in brain activity and gray matter volume.
  • Genetic factors related to synaptic function and channel activity may underlie these OSA-induced brain changes.
  • Further research into these genetic mechanisms could inform targeted interventions for OSA-related neurological deficits.