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Updated: Dec 21, 2025

A Model for Epilepsy of Infectious Etiology using Theiler's Murine Encephalomyelitis Virus
Published on: June 23, 2022
A novel ITPA variant causes epileptic encephalopathy with multiple-organ dysfunction.
Masamune Sakamoto1,2, Den Kouhei1, Muzhirah Haniffa3
1Department of Human Genetics, Graduate School of Medicine, Yokohama City University, Yokohama, Japan.
Biallelic variants in the ITPA gene cause severe epileptic encephalopathies, impacting myelination and development. This study identifies two new ITPA variants linked to these severe neurological conditions in infants.
Area of Science:
- Genetics and Molecular Biology
- Neuroscience
- Metabolic Disorders
Background:
- Inborn errors of metabolism are a known cause of epileptic encephalopathies.
- Biallelic loss-of-function variants in the ITPA gene (encoding inosine triphosphate pyrophosphatase, ITPase) are associated with specific neurological deficits, including lack of myelination in critical brain pathways (MIM:616647).
- ITPase is crucial for purine metabolism.
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