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Published on: August 20, 2019
An X-linked syndrome with severe neurodevelopmental delay, hydrocephalus, and early lethality caused by a missense
Kornelia Tripolszki1, Erina Sasaki2, Ronja Hotakainen1
1CENTOGENE GmbH, Rostock, Germany.
Insights
A novel X-linked syndrome caused by OTUD5 gene defects affects multiple generations, leading to severe developmental delay and early fatality in males. Female carriers remain asymptomatic, highlighting a significant genetic discovery.
Area of Science:
- Genetics
- Neurology
- Pediatrics
Background:
- Describes a rare X-linked syndrome impacting multiple generations within a single family.
- Affected males exhibit severe prenatal and neonatal complications, including intrauterine growth retardation, ventriculomegaly, hydrocephalus, hypotonia, congenital heart defects, hypospadias, and profound neurodevelopmental delay.
Abstract:
We describe an X-linked syndrome in 13 male patients from a single family with three generations affected. Patients presented prenatally or during the neonatal period with intrauterine growth retardation, ventriculomegaly, hydrocephalus, hypotonia, congenital heart defects, hypospadias, and severe neurodevelopmental delay. The disease is typically fatal during infancy, mainly due to sepsis (pneumonias). Female carriers are asymptomatic. We performed genome sequencing in four individuals and identified a unique candidate variant in the OTUD5 gene (NM_017602.3:c.598G > A, p.Glu200Lys). The variant cosegregated with the disease in 10 tested individuals. OTUD5 was considered as a candidate gene based on two previous missense variants detected in patients with intellectual disability. In conclusion, we define a syndrome associated with OTUD5 defects and add compelling evidence of genotype-phenotype association. This finding ended the long diagnostic odyssey of this family.
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