Gene-linked behavioral patterns in ALS and frontotemporal dementia
A review of patients carrying disease-linked mutations described different behavioral and cognitive patterns by gene. Overlapping symptoms and missing quantitative estimates limit predictions for individuals.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
Among patients carrying mutations linked to amyotrophic lateral sclerosis or frontotemporal dementia, the review described different patterns of behavioral and cognitive symptoms across genes. These patterns are associations, rather than reliable predictions of an individual's future symptoms. The abstract gives no numerical association estimates, and overlapping symptoms make the gene-specific profiles less clear-cut.
The abstract provides no pooled association estimates, confidence intervals or follow-up durations. It describes overlapping symptoms and clinical variation, so it cannot quantify how accurately a mutation predicts a person's behavior.
Which patterns were described?
C9orf72 mutations were associated with psychotic symptoms and aggression. Progranulin mutations were linked to apathy, meaning reduced motivation, and hallucinations. Mutations in the tau gene were associated with disinhibition, meaning less restrained behavior.
Why avoid deterministic interpretations?
The review reported minimal effects on thinking for SOD1 mutations, while other mutation groups had different symptom patterns. Symptoms overlapped and clinical presentations varied, limiting how confidently these summaries can describe any particular patient.
The original publication
The Differential Effects of Genetic Mutations in ALS and FTD Genes on Behavioural and Cognitive Changes: A Systematic Review and Meta-Analysis.
Jiménez-García AM, Tortorella ME, Nishimura AL et al.
Int J Mol Sci · 2025
- PubMed ID
- 40649976
- Record checked
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