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De novo MAP2K4 variants cause a novel neurodevelopmental syndrome with impaired JNK signaling in iPSC-derived neurons

2025-12-27 genetic and genomic medicine Title + abstract only
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MAP2K4 encodes a kinase that activates the c-Jun N-terminal kinase (JNK) pathway, which is essential for human neurodevelopment. While somatic MAP2K4 loss has been observed in cancer, germline variants have not previously been linked to human disease. We describe ten individuals with de novo or presumed de novo MAP2K4 variants who present with a novel syndromic neurodevelopmental disorder. Shared features include developmental delay or intellectual disability, epilepsy, and variable congenital m...

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