New Approach Enables Spatial Manipulation of Protein Aggregates

Protein aggregates, which accumulate during aging and are associated with neurodegenerative diseases such as Alzheimer's, Parkinson's, and Huntington's disease, have been made amenable to spatial manipulations through a novel engineered approach. The study, conducted by the Nyström lab at Gothenburg University and published in Nature Communications, describes a system that allows for the export of protein aggregates from cells. It was developed in budding yeast and extended to human cells.

The synthetic cellular export system involves fusing an aggregate-binding protein with a daughter-cell-targeting factor. As the daughter cell separates from the mother cell, the aggregates are retained in the daughter cell, leaving the mother cell free of protein aggregates. This approach effectively dealt with endogenous protein aggregates associated with aging and mutant Huntingtin aggregates linked to Huntington's disease.

The researchers demonstrated that the export of mutant Huntingtin aggregates protected yeast mother cells from cell death, suggesting that large aggregates could be highly toxic and contribute to the disease. This finding provides insight into the ongoing debate regarding the role of aggregates in neurodegenerative diseases.

Dr. Arthur Fischbach, the lead author of the study, highlighted the significance of their findings, stating that it is the first demonstration of protein aggregates being exported from cells in a controlled and engineered manner. He also emphasized the potential application of this approach for other types of cellular damage and its potential as a future therapeutic approach or tool for better understanding neurodegenerative diseases.