期刊
BMC OPHTHALMOLOGY
卷 21, 期 1, 页码 -出版社
BMC
DOI: 10.1186/s12886-021-02013-2
关键词
N-linked glycosylation; Congenital disorder of glycosylation; ALG3-CDG; Optic nerve hypoplasia; Arthrogryposis; Transferrin isoelectric focusing; Novel mutation
资金
- Ministry of Health of the Czech Republic [RVO-VFN 64165, AZV NU20-07-00182]
- Charles University [UNCE/MED/007, SVV 260516, PROGRES-Q26/LF1]
- EUROGLYCAN-omics, Ministry of Education Youth and Sports of Czech Republic under E-Rare3, the ERA-Net for Research on Rare Diseases [8F19002]
ALG3-CDG is a rare autosomal recessive disease characterized by severe neurologic, cardiac, musculoskeletal, and ocular phenotype. Visual impairment in ALG3-CDG is most commonly linked to optic nerve hypoplasia.
BackgroundALG3-CDG is a rare autosomal recessive disease. It is characterized by deficiency of alpha-1,3-mannosyltransferase caused by pathogenic variants in the ALG3 gene. Patients manifest with severe neurologic, cardiac, musculoskeletal and ophthalmic phenotype in combination with dysmorphic features, and almost half of them die before or during the neonatal period.Case presentationA 23 months-old girl presented with severe developmental delay, epilepsy, cortical atrophy, cerebellar vermis hypoplasia and ocular impairment. Facial dysmorphism, clubfeet and multiple joint contractures were observed already at birth. Transferrin isoelectric focusing revealed a type 1 pattern. Funduscopy showed hypopigmentation and optic disc pallor. Profound retinal ganglion cell loss and inner retinal layer thinning was documented on spectral-domain optical coherence tomography imaging. The presence of optic nerve hypoplasia was also supported by magnetic resonance imaging. A gene panel based next-generation sequencing and subsequent Sanger sequencing identified compound heterozygosity for two novel variants c.116del p.(Pro39Argfs*40) and c.1060 C>T p.(Arg354Cys) in ALG3.ConclusionsOur study expands the spectrum of pathogenic variants identified in ALG3. Thirty-three variants in 43 subjects with ALG3-CDG have been reported. Literature review shows that visual impairment in ALG3-CDG is most commonly linked to optic nerve hypoplasia.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据