Exploring the Link Between Serine Ether Glycerophospholipids and Cognitive Impairment

Published on August 8, 2022

Imagine your brain is like a bustling city, with thousands of buildings made up of membranes. These membranes need to be flexible and able to fuse together for communication between brain cells. That’s where ether glycerophospholipids (GPL) come in! Think of GPL as the construction materials that make the membranes sturdy yet adaptable. But here’s the twist: some of these GPL, called serine ether GPL, seem to be dwindling in the frontal cortex of individuals with mild cognitive impairment (MCI) and Alzheimer’s disease. It’s like losing crucial blueprints needed for building strong connections in the city! Researchers used a powerful tool called high-resolution mass spectrometry to uncover this fascinating finding. Surprisingly, these reductions were specific to dementia-related conditions and not seen in other disorders like schizophrenia. This opens up a whole new avenue of investigation into how serine ether GPL impact brain function and whether boosting their levels could help combat cognitive decline. Curious to dig deeper? Check out the research article below and join in on unraveling the mysteries of our extraordinary brains!

Ether glycerophospholipids (GPL) are involved in membrane fluidity and fusion. Vinyl-ether GPL are also conjectured to provide antioxidant capacity in the brain. The roles of these lipids in the processes involved in the development of dementia are not understood but choline and ethanolamine vinyl-ether GPL (i.e., plasmalogens) are decreased in the brains of subjects with dementia. In contrast, serine ether and vinyl-ether GPL have not been investigated in human brain. We therefore undertook an evaluation of these lipids, utilizing high-resolution mass spectrometry (HR-MS), in tissues from control and dementia subjects that we had previously characterized in-depth. We can report for the first time that a number of serine ether GPL and a more limited number of serine plasmalogens are present in human frontal cortex. In addition, we found that some of these frontal cortex lipids are decreased in Mild Cognitive Impairment (MCI), early-onset Alzheimer’s disease (EOAD), and late-onset AD (LOAD). In contrast no alterations in serine ether GPL were monitored in the frontal cortex of donors with schizophrenia, demonstrating disease specificity. These data suggest that further studies of the roles of ether GPL, including serine ether GPL, in brain function are worthy of undertaking.

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