Uncovering Hidden Pathways in Parkinson’s Disease Progression

Researchers, led by Dr. Joseph Mazzulli, have made significant discoveries about how proteins misfold and clump together in neurons affected by Parkinson’s disease. These protein clumps, particularly of a protein called alpha-synuclein, are a hallmark of the disease and can damage neurons. Dr. Mazzulli's team used stem cell models derived from patients with Parkinson’s and Lewy body dementia to study these protein aggregations. They found that alpha-synuclein clumps disrupt the normal functioning of cells, leading to a buildup of proteins that can't be properly disposed of, which further contributes to the disease. Interestingly, they also discovered other proteins, called NONO and SFPQ, that clump together in the nucleus of neurons in a similar way. These proteins normally help with RNA processing, but when they form large clumps, they can't function properly, leading to further neuronal damage. Moreover, the researchers identified a disrupted metabolic pathway, known as the hexosamine pathway, which is crucial for proper protein folding and functioning. By restoring this pathway with a compound called n-acetylglucosamine, they were able to improve protein folding and reduce protein clumping in their cell models. Overall, this research highlights the importance of addressing multiple disrupted pathways to develop effective treatments for Parkinson’s disease.