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Updated: Jul 6, 2025

In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila
Published on: August 20, 2019
A novel DLG4 variant causes DLG4-related synaptopathy with intellectual regression
Sachi Tokunaga1, Hideki Shimomura2, Naoko Taniguchi2
1Department of Pediatrics, Hyogo Medical University School of Medicine, Nishinomiya, Hyogo, Japan. sa-tokunaga@hyo-med.ac.jp.
Abstract:
DLG4-related synaptopathy is a neurodevelopmental disorder caused by a DLG4 variant. We identified a novel de novo heterozygous frameshift variant, NM_001321075.3(DLG4):c.554_563del, in a Japanese girl. Intellectual regression without motor delay was observed at 2 years of age, and she was diagnosed with autism spectrum disorder and attention-deficit/hyperactivity disorder. Recognizing the possibility of DLG4-related synaptopathy in patients with intellectual regression is important for ensuring an accurate diagnosis.
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