Common Genetic Causes Across Motor Neuron Diseases Identified

Strategic Insights -

Researchers from St. Jude Children's Research Hospital and the University of Miami Miller School of Medicine have made a groundbreaking discovery regarding the genetic causes of motor neuron diseases. Their analysis found that motor neuron diseases, such as amyotrophic lateral sclerosis (ALS) and hereditary spastic paraplegia (HSP), share previously unknown ultrarare gene variants and a significant overlap of contributing genes. This new understanding of the shared genetic origins of these diseases is crucial for developing meaningful therapeutics and deciphering the origins of these disorders.

Key Takeaways:

  • Motor neuron diseases, such as ALS and HSP, have distinct characteristics, but share physical similarities and genetic overlap, with previously unknown ultrarare gene variants linked to the diseases.
  • Researchers used a tool called CoCoRV to analyze a large dataset with multiple related motor neuron disorders and found that genes associated with HSP could also increase risk for sporadic ALS.
  • The study identified 423 unique disease-causing variants across 222 ALS and 134 HSP patients, with many HSP-linked gene modifications found in non-familial ALS patients, and vice versa.
  • The researchers leveraged an analysis tool developed at St. Jude called CoCoRV to evaluate the enrichment of ultrarare variants contributing to ALS and HSP, compared with healthy controls.
  • The study represented 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.
  • Gang Wu, PhD, St. Jude Department of Pathology associate member and Center for Applied Bioinformatics director, emphasized that variants often dismissed as not contextually relevant can actually increase risk for motor neuron diseases.

Statistics:

  • 423 unique disease-causing variants identified across 222 ALS and 134 HSP patients.
  • Many HSP-linked gene modifications found in non-familial ALS patients, and vice versa.
  • The study used a large dataset with multiple related motor neuron disorders, including patients from the Clinical Research in ALS and Related Disorders for Therapeutic Development (CReATe) Consortium's Phenotype-Genotype-Biomarker study.
  • Patients from the United States, Europe, and South Africa were included in the study.
  • The analysis tool CoCoRV was developed at St. Jude and leveraged to evaluate the enrichment of ultrarare variants contributing to ALS and HSP, compared with healthy controls.

Sources:

  • St. Jude Children's Research Hospital. (2025, October 29). Common Genetic Causes Across Motor Neuron Diseases Identified. Retrieved from