Multi-region brain transcriptomics reveals distinct molecular mechanisms in C9orf72 ALS
Integrative analysis across multiple CNS regions distinguishes molecular signatures of C9orf72-expansion ALS from non-C9orf72 cases, published in PLOS Genetics.
Researchers led by Yu-Wen Hsu, Yu-Ning Lu, Mingming Liu, and Jiou Wang have published an integrative transcriptomic study in PLOS Genetics examining the molecular landscape of amyotrophic lateral sclerosis (ALS) across multiple central nervous system regions. The study compared post-mortem tissue from ALS patients carrying pathological hexanucleotide repeat expansions in the C9orf72 gene — the most common genetic cause of both familial and sporadic ALS — with tissue from ALS patients without this mutation.
By profiling gene expression across multiple brain and spinal cord regions simultaneously, the team identified divergent molecular mechanisms between the two patient groups, suggesting that C9orf72-associated ALS involves distinct transcriptional dysregulation compared with other ALS subtypes. The multi-regional approach is notable because it allows comparison of molecular changes in areas differentially affected by neurodegeneration, rather than relying on a single tissue sample.
The findings contribute to a growing body of work seeking to stratify ALS at the molecular level, which researchers in the field regard as a prerequisite for developing targeted interventions. The study is peer-reviewed and published in an open-access journal, making the data and methods accessible to the wider research community. Primary data from this type of integrative transcriptomic work are also expected to inform future functional and therapeutic studies targeting C9orf72-pathway biology.
Plain-language version
For patients, families, and general readers. Educational only — not medical advice.
ALS (also called motor neurone disease) is a condition that affects the nerve cells controlling movement. Some people with ALS carry a change in a gene called C9orf72, and this is the most common known genetic cause of the condition.
Researchers have now published a study looking at gene activity across many different parts of the brain and spinal cord in people who had ALS — comparing those who had the C9orf72 gene change with those who did not. They found that the two groups showed different patterns of molecular activity, suggesting the disease may work through different biological pathways in different people.
This kind of research helps scientists understand ALS better at a biological level, which is a step towards developing treatments that could one day target its underlying causes. The study was published in a peer-reviewed scientific journal.
This is an educational summary, not medical advice. If anything here raises questions for you, please speak with your GP or a clinical professional.
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Primary source PLOS Genetics · 2026-07-08Multi-regional transcriptomic profiling reveals divergent molecular mechanisms in ALS-related neurodegeneration