BDNF gene variants and brain morphology in schizophrenia

Area of Science:

• Neuroscience
• Genetics
• Psychiatry

Background:

• Schizophrenia is associated with brain structural abnormalities.
• Brain-derived neurotrophic factor (BDNF) plays a crucial role in neuronal development and function.
• Genetic variations in BDNF may influence brain morphology and contribute to schizophrenia pathophysiology.

Purpose of the Study:

• To investigate associations between BDNF gene polymorphisms and brain morphology in patients with schizophrenia and healthy controls.
• To determine if specific BDNF variants correlate with variations in gray matter, white matter, and cerebrospinal fluid volumes.

Main Methods:

• Genotyping of four BDNF polymorphisms in 96 schizophrenia patients and 104 healthy controls.
• Magnetic resonance imaging (MRI) to measure 39 brain volume parameters, including total brain, lobes, cerebellum, striatum, hippocampus, and corpus callosum.
• Statistical analysis to identify correlations between BDNF genotypes and brain volumes.

Main Results:

• The BDNF 11757 G/C polymorphism was significantly associated with frontal gray matter volume in both patient and control groups.
• The BDNF 270 C/T polymorphism correlated with caudate volume in patients.
• Specific BDNF polymorphisms and haplotypes were linked to posterior superior cerebellar vermis and cerebellar hemisphere volumes in combined or control groups.

Conclusions:

• BDNF gene variations show significant associations with brain morphology in schizophrenia patients and healthy individuals.
• These findings suggest that BDNF gene polymorphisms may influence brain structure, potentially impacting schizophrenia development.
• The effects of BDNF gene variations on brain morphology might differ between schizophrenia patients and healthy subjects.