Abstract |
DBR1 encodes the only known human lariat debranching enzyme and its deficiency has been found to cause an autosomal recessive inborn error of immunity characterized by pediatric brainstem viral-induced encephalitis (MIM 619441). We describe a distinct allelic disorder caused by a founder recessive DBR1 variant in four families (DBR1(NM_016216.4):c.200A > G (p.Tyr67Cys)). Consistent features include prematurity, severe intrauterine growth deficiency, congenital ichthyosis-like presentation ( collodion membrane, severe skin peeling and xerosis), and death before the first year of life. Patient-derived fibroblasts displayed the characteristic accumulation of intron lariats in their RNA as revealed by targeted and untargeted analysis, in addition to a marked reduction of DBR1 on immunoblot analysis. We propose a novel DBR1-related developmental disorder that is distinct from DBR1-related encephalitis susceptibility and highlight the apparent lack of correlation with the degree of DBR1 deficiency.
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Authors | Hanan E Shamseldin, Mukunth Sadagopan, Javier Martini, Ruslan Al-Ali, Mandy Radefeldt, Mojgan Ataei, Sabrina Lemke, Zuhair Rahbeeni, Fuad Al Mutairi, Faroug Ababneh, Hadeel A AlRukban, Firdous Abdulwahab, Saleh Mohammed Alhajj, Peter Bauer, Aida Bertoli-Avella, Fowzan S Alkuraya |
Journal | Human genetics
(Hum Genet)
Vol. 142
Issue 10
Pg. 1491-1498
(Oct 2023)
ISSN: 1432-1203 [Electronic] Germany |
PMID | 37656279
(Publication Type: Journal Article)
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Copyright | © 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature. |
Chemical References |
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Topics |
- Child
- Humans
- Alleles
- Causality
- Encephalitis
- Fibroblasts
- Ichthyosis
(genetics)
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