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Disease susceptibility

Shared Genetic Origins of Motor Neuron Diseases Revealed

Strategic Insights

— 1 min read

Motor neuron diseases, such as amyotrophic lateral sclerosis (ALS) and hereditary spastic paraplegia (HSP), have long been viewed as genetically distinct. However, a recent study led by researchers from St. Jude Children's Research Hospital and the University of Miami Miller School of Medicine has identified common genetic causes across these diseases. The study found that previously unknown ultrarare gene variants are linked to both ALS and HSP, and that there is significant overlap of contributing genes between the diseases. This new understanding of the shared genetic origins of motor neuron diseases is crucial for deciphering the origins of these disorders and developing meaningful therapeutics.

Key Takeaways:

  • Researchers from St. Jude Children's Research Hospital and the University of Miami Miller School of Medicine identified 423 unique disease-causing variants across 222 ALS and 134 HSP patients.
  • Many HSP-linked gene modifications were found in non-familial ALS patients, and vice versa, indicating a significant overlap of contributing genes between the diseases.
  • The study found significant enrichment of ultrarare variants contributing to ALS and HSP, compared with healthy controls, using the CoCoRV analysis tool.
  • The researchers identified previously unknown ultrarare variants linked to both ALS and HSP, including the canonical HSP gene AP4S1, which was found to be significantly enriched in ultrarare variants in ALS patients with European ancestry.
  • The study represents typical patients from multiple centers from the United States, Europe, and South Africa participating in the Clinical Research in ALS and Related Disorders for Therapeutic Development (CReATe) Consortium's Phenotype-Genotype-Biomarker study.
  • The findings of this study highlight the importance of an unbiased approach to interpreting genetic mutations linked to specific diseases and call for further investigation into motor neuron disease-associated genes.

Statistics:

  • 423 unique disease-causing variants were identified across 222 ALS and 134 HSP patients.
  • 222 ALS patients and 134 HSP patients were analyzed in the study.
  • The study found significant enrichment of ultrarare variants contributing to ALS and HSP, compared with healthy controls.
  • The canonical HSP gene AP4S1 was found to be significantly enriched in ultrarare variants in ALS patients with European ancestry.

Sources:

  • St. Jude Children's Research Hospital
  • University of Miami Miller School of Medicine
  • National Institutes of Health (U54NS092091)
  • National Cancer Institute (P30CA021765)
  • ALS Association (17-LGCA-331 and 16-TACL-242)
  • Wellcome Trust (226519/Z/22/Z)
  • American Lebanese Syrian Associated Charities (ALSAC)
  • Clinical Research in ALS and Related Disorders for Therapeutic Development (CReATe) Consortium's Phenotype-Genotype-Biomarker study

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