SUDEP risk is influenced by longevity genomics: a polygenic risk score study

Area of Science:

• Genetics
• Epilepsy Research
• Medical Risk Prediction

Background:

• Sudden Unexpected Death in Epilepsy (SUDEP) is a significant concern for epilepsy patients, yet its mechanisms remain poorly understood.
• Clinical factors for SUDEP risk are known, but predicting it, especially early in the disease, is challenging.
• This study investigated the hypothesis that common genetic variations contribute to SUDEP risk.

Purpose of the Study:

• To determine if common genetic variations contribute to the risk of Sudden Unexpected Death in Epilepsy (SUDEP).
• To explore the role of polygenic risk scores (PRSs) in SUDEP.
• To evaluate the potential of integrating genomic information into existing SUDEP risk prediction tools.

Main Methods:

• Compared genetic data from SUDEP cases, epilepsy cases without SUDEP, and healthy controls.
• Calculated and compared polygenic risk scores (PRSs) for longevity, intelligence, and epilepsy across cohorts.
• Analyzed single nucleotide polymorphisms (SNPs) for enriched pathways and gene ontology terms, and assessed the added value of PRSs to the SUDEP-3 risk prediction tool.

Main Results:

• Reduced PRS for longevity and intelligence were observed in SUDEP cases compared to both epilepsy and healthy controls.
• No significant difference in PRS for epilepsy was found between SUDEP and epilepsy cases.
• SNP analysis identified pathways related to inter-neuronal communication as enriched in SUDEP.
• Adding PRSs for longevity and intelligence to the SUDEP-3 score significantly improved risk prediction accuracy (AUC from 0.699 to 0.913).

Conclusions:

• Common genetic variation plays a role in SUDEP risk.
• Polygenic risk scores, particularly for longevity and intelligence, can enhance SUDEP risk prediction.
• These findings open new avenues for understanding SUDEP mechanisms and improving patient risk stratification.