Molecular pathway that links aging to neurodegenerative diseases

On August 3, 2026, researchers released a study that identifies a protein pathway capable of linking aging to the accumulation of harmful proteins observed in diseases such as Huntington and amyotrophic lateral sclerosis (ALS). The work was led by Professor Dr. David Vilchez of the CECAD Cluster of Excellence for Aging Research and published in the journal Nature Aging.

The role of EPS8 in aging

The study focused on the EPS8 protein, already known to accumulate as organisms age. In previous work, the increasing presence of EPS8 in Caenorhabditis elegans activated stress responses that shorten the worms' lifespan. This protein, conserved throughout evolution, is also present in human cells.

How increased EPS8 promotes protein aggregation

The authors demonstrated that elevated EPS8 levels and hyperactivation of its signaling pathways promote the aggregation of pathological proteins, a hallmark of neurodegeneration. When EPS8 activity was reduced, toxic aggregates no longer formed as frequently, indicating that the protein acts as a direct trigger of this process.

Experiments in Caenorhabditis elegans

In the worms, decreasing EPS8 activity preserved neuronal function in Huntington and ALS models. These results confirm that the studied molecular pathway has functional impact, not just biochemical. "We are delighted to uncover a molecular mechanism that could shed light on how aging contributes to diseases like ALS and Huntington's," says the first author, Dr. Seda Koyuncu.

Validation in human cell models

To assess relevance in humans, the researchers lowered EPS8 levels in model cell lines of Huntington and ALS. The intervention prevented the buildup of toxic aggregates, replicating the findings obtained in C. elegans. "It's incredibly exciting that the mechanisms we uncovered in C. elegans are also conserved in human cell models," comments Professor Dr. David Vilchez.

Implications for future therapies

Although it is not yet clear exactly how increased EPS8 activity promotes protein aggregation, the study fills an important gap by establishing a direct molecular connection between aging and neurodegeneration. EPS8 and its signaling partners emerge as potential targets for interventions that could slow or halt the progression of ALS, Huntington's disease, and other brain disorders associated with aging.

With information from ScienceDaily.