Cracking the Brain’s Delivery Cod

Just like postal services ensure packages reach the right address, our brain has a sophisticated delivery system that transports essential molecules to the correct locations inside cells. If this system breaks down, important materials get lost or misplaced—leading to brain diseases like Alzheimer’s, Parkinson’s, and ALS. A team of scientists from Lauren Jackson’s Lab has uncovered how key proteins work together in this transport system and what happens when they malfunction. Their research, published in Science Advances, could open new doors for treating neurodegenerative diseases. The Brain’s Molecular Shipping System At the centre of this system is a group of proteins called retromer and sorting nexins (SNXs). Together, they help form structures that move essential molecules where they need to go. If these proteins are missing or don’t function properly, molecules get misplaced—disrupting brain function and contributing to neurodegeneration. “This discovery gives us a deeper understanding of how these proteins interact and maintain a healthy brain environment,” explained lead researcher Mintu Chandra. Why This Discovery Matters The team used advanced imaging, biochemistry, and AI-based modeling to analyse how specific proteins interact, including how SNX27 connects with another regulatory protein called VARP. They found that some of these proteins actually change shape when they interact—an insight that could lead to new treatments. “If we can find a way to ‘lock’ these proteins in an active or inactive state using small molecules or drugs, we may be able to treat brain diseases at a molecular level,” said Associate Professor Lauren Jackson. What’s Next? The researchers now plan to take their work further by using high-tech imaging methods to map these protein structures in even greater detail. They will also investigate how breakdowns in this transport system contribute to brain diseases, with the long-term goal of developing therapies that restore normal function. By understanding the brain’s molecular delivery system, scientists are moving one step closer to finding new ways to prevent or slow down neurodegenerative diseases.