Alzheimer’s & Fat Droplets: Protein Link Found
- - A team at the UNC School of Medicine, led by Sarah Cohen and Ian Windham, has uncovered new insights into the role of apolipoprotein E (APOE) in...
- Individuals inheriting the APOE4 variant face a significantly higher risk of developing alzheimer's.
- The study revealed that astrocytes, critical brain cells, are more susceptible to damage when APOE4 surrounds their lipid storage centers.
Uncover a groundbreaking link between the APOE4 genetic variant and Alzheimer’s disease. UNC School of Medicine researchers have exposed critical interactions between APOE4, the primary risk factor, and brain lipids. Their five-year study illuminates how APOE4 alters the function of astrocytes, vital cells responsible for clearing toxic lipids. When astrocytes are compromised by APOE4, they cannot perform this crucial role. The study reveals new insights into how APOE4 impacts lipid storage, possibly accelerating the growth of Alzheimer’s. This innovative research suggests lipids, alongside amyloid beta plaques and tau tangles, are integral to comprehending the disease. News Directory 3 is proud to highlight this pivotal research. Discover what’s next for potential Alzheimer’s therapies by exploring the deeper connection between APOE4 and lipid interactions.
APOE4’s Role in Alzheimer’s: New Lipid Connection Discovered
Updated June 22, 2025
Chapel Hill, N.C. - A team at the UNC School of Medicine, led by Sarah Cohen and Ian Windham, has uncovered new insights into the role of apolipoprotein E (APOE) in Alzheimer’s disease. Their research focuses on how APOE4, the most important genetic risk factor for late-onset Alzheimer’s, interacts with lipids in the brain.
Individuals inheriting the APOE4 variant face a significantly higher risk of developing alzheimer’s. Cohen and Windham’s five-year study aimed to visualize and understand the relationship between APOE4, Alzheimer’s disease, and brain lipids, hoping to pave the way for targeted therapies.
The study revealed that astrocytes, critical brain cells, are more susceptible to damage when APOE4 surrounds their lipid storage centers. This dysfunction may hinder the astrocytes’ ability to clear toxic lipids, further exacerbating Alzheimer’s development.
Lipids comprise 60% of the brain’s dry mass,playing a vital role in energy storage and myelin formation. Astrocytes usually clean up toxic lipids released by stressed neurons, preventing their accumulation. Though, when astrocytes are compromised, they cannot perform this function, impacting the brain’s ability to clear amyloid beta plaques, another hallmark of Alzheimer’s.
Windham developed a system to observe APOE’s behavior within astrocytes under a microscope. Tagging APOE with green fluorescent protein allowed the team to track its movements within living cells. When astrocytes were exposed to oleic acid, APOE4 migrated to lipid droplets, altering their shape and size. This suggests that APOE4 can become trapped inside astrocytes, perhaps disrupting their function and affecting the clearance of amyloid beta.
Cohen emphasizes the importance of further research into the role of lipid droplets in Alzheimer’s and othre neurodegenerative diseases. She noted that Alois Alzheimer’s original paper highlighted amyloid beta plaques, tau tangles, and lipid accumulations as key characteristics of the disease. While amyloid beta and tau tangles have received significant attention,Cohen believes lipids hold crucial clues,especially given APOE’s prominent genetic risk factor status.
What’s next
Further studies will explore the specific mechanisms by which APOE4 alters lipid droplet composition and how this impacts astrocyte function, potentially leading to new therapeutic targets for Alzheimer’s disease.