BDNF polymorphism rs6265 and hippocampal structure and memory performance in healthy control subjects

Area of Science:

• Neuroscience
• Genetics
• Cognitive Psychology

Background:

• Brain-derived neurotrophic factor (BDNF) is crucial for neuronal function, particularly in the hippocampus.
• The BDNF Val66Met polymorphism (rs6265) may influence protein secretion and cognitive functions.
• Prior studies suggest a link between the Met allele and reduced hippocampal volume and memory deficits.

Purpose of the Study:

• To investigate the association between the BDNF Val66Met polymorphism and hippocampal structure.
• To examine the relationship between the BDNF Val66Met polymorphism and memory performance in healthy humans.
• To determine the influence of age on these relationships.

Main Methods:

• Genotyping of 154 healthy subjects for the BDNF Val66Met polymorphism.
• High-resolution magnetic resonance imaging (MRI) and high-dimensional brain mapping for hippocampal volume assessment.
• Neuropsychological tests to evaluate memory performance.
• Statistical analysis controlling for age.

Main Results:

• No significant association was found between BDNF genotype and hippocampal structure.
• The BDNF Val66Met polymorphism did not significantly affect memory performance.
• Age was significantly correlated with whole brain volume and memory task performance.

Conclusions:

• The Met allele of the BDNF rs6265 polymorphism is not associated with hippocampal structure or memory performance in a large cohort of healthy individuals.
• Age is a significant factor influencing brain volume and cognitive function.
• These findings contribute to understanding the genetic and environmental factors affecting brain health.