Lipidome alterations in human prefrontal cortex during development, aging, and cognitive disorders

Area of Science:

• Neuroscience
• Lipidomics
• Aging Research

Background:

• Lipids are crucial for brain function but remain understudied.
• Understanding the brain lipidome is key to deciphering neurological health and disease.

Purpose of the Study:

• To investigate the lipidome composition of prefrontal cortex gray matter across a lifespan.
• To examine how aging and specific neurological conditions (autism, schizophrenia, Down syndrome) affect brain lipids.

Main Methods:

• Analyzed the lipidome of prefrontal cortex gray matter from 396 healthy individuals (spanning 100 years) and 67 adults with autism (ASD), schizophrenia (SZ), or Down syndrome (DS).
• Utilized mass spectrometry to detect and quantify over 5000 lipids.

Main Results:

• 95% of detected lipids showed age-dependent concentration changes, defining four temporal stages and increasing membrane fluidity with age.
• Aging impacted 14% of the brain lipidome, with significant changes emerging around 50-55 years.
• ASD, SZ, and DS altered lipid composition, notably decreasing glycerophospholipid metabolism and endocannabinoid signaling; SZ lipid changes correlated with genetic risk factors.

Conclusions:

• The brain lipidome undergoes substantial age-related transformations influencing membrane properties.
• Neurological disorders significantly disrupt brain lipid metabolism, with implications for disease mechanisms and progression.
• Lipidomic analysis offers insights into the biological underpinnings of aging and neurodevelopmental conditions.