Amyotrophic lateral sclerosis (ALS), also known as Lou Gehrig’s disease, destroys nerve cells in the brain and spinal cord. The disease progressively robs people of movement, independence, and, ultimately, life.
For some patients, ALS also overlaps with frontotemporal dementia (FTD), a condition that affects memory, behavior, and personality.
Together, ALS and FTD create a devastating combination of physical and cognitive symptoms.
Now, researchers at the University of Cambridge have developed a new type of “mini-brain” that may help scientists better understand both diseases and identify potential treatments.
Building Better Models of Neurodegenerative Disease
Researchers created the mini-brains using induced pluripotent stem cell (iPSC) technology.
The process starts with skin or blood cells donated by patients with ALS/FTD. Scientists reprogram those cells into stem cells and then guide them to become the nerve cells affected by the disease.
Because the cells come from patients, they carry the same genetic changes and disease characteristics found in ALS/FTD.
This allows researchers to study the disease in a laboratory setting.
Scientists have used similar models before. However, traditional mini-brains have important limitations.
As the cell clusters grow larger, cells in the center struggle to receive enough oxygen and nutrients. As a result, the models survive for only a limited time.
The Cambridge team developed a different approach.
Instead of creating large cell clusters, the researchers grew thin slices of brain tissue. This design allowed nutrients to reach all the cells and supported much longer survival.
The result was a more stable and realistic model of disease progression.
Mini-Brains Reveal Early Signs of Disease
The longer lifespan gave researchers a clearer view of how ALS/FTD develops over time.
They observed disease-related changes much earlier than previously possible.
The team detected DNA damage, cellular stress, and other abnormalities during the earliest stages of disease.
They also observed how those changes affected neighboring brain cells involved in movement and behavior.
According to senior author Dr. András Lakatos, capturing these complex interactions is essential for understanding neurodegenerative diseases.
“Neurodegenerative diseases are very complex disorders that can affect many different cell types and how these cells interact as the diseases progress,” he said.
The new model allows researchers to study those interactions over extended periods and track how disease processes evolve.
A Potential Tool for Drug Discovery
The mini-brains may also accelerate the search for new therapies.
Because the tissues contain patient-derived cells, researchers can test potential treatments before moving into animal studies or clinical trials.
The Cambridge team screened multiple compounds using the ALS/FTD mini-brains.
One drug candidate, GSK2606414, produced encouraging results.
The compound reduced toxic protein buildup, lowered cellular stress, and decreased nerve cell loss in the laboratory model.
These findings suggest the drug may warrant further investigation.
However, the researchers emphasize that the results remain preliminary.
Additional studies will need to confirm the findings and determine whether the therapy could benefit patients.
Looking Ahead
The study highlights the growing value of stem cell technologies in understanding complex neurological diseases.
By creating longer-lasting and more sophisticated disease models, researchers can explore the earliest stages of disease, identify new treatment targets, and evaluate potential therapies more effectively.
While much work remains, these mini-brains provide an important new tool for studying conditions that have long challenged researchers.
The findings were published in the journal Cell Stem Cell.
CIRM continues to support efforts to develop new treatments for ALS and has funded multiple clinical trials aimed at slowing or stopping the progression of this devastating disease.
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Cells require growth factors for survive, proliferation, differentiation and functioning. Cells require both homologous and heterogeneous cells to produce growth factors for growth and functioning. The arrangement of different developing cell types in tissues and organs showed cell-cell communication are important for cell development. The inability of three-dimension structure of organoids for vascularization process may cause inner part of cells to develop hypoxia and form unhealthy cells. However, growing a thin layer of cells without couple with heterogeneous neighboring cells may neglect some essential growth factors for cell requirement. Therefore, results of unhealthy cells may hinder the developing of effective therapeutic treatment for cell-based therapy .
Lou Gehrig’s is harrowing enough by itself. Really encouraging stuff, thank you.