1. Two novel compound heterozygous variants of LTBP4 in a Chinese infant with cutis laxa type IC and a review of the related literature.
- Author
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Zhang Q, Qin Z, Yi S, Wei H, Zhou XZ, and Su J
- Subjects
- Asian People genetics, Chromosomes, Human, Pair 19 genetics, Codon, Nonsense, Cutis Laxa ethnology, Female, Heterozygote, Humans, Infant, Infant, Newborn, Latent TGF-beta Binding Proteins chemistry, Latent TGF-beta Binding Proteins physiology, Models, Molecular, Open Reading Frames genetics, Pedigree, Protein Conformation, Pulmonary Emphysema diagnostic imaging, Pulmonary Emphysema genetics, Exome Sequencing, Abnormalities, Multiple genetics, Cutis Laxa genetics, Frameshift Mutation, Latent TGF-beta Binding Proteins genetics
- Abstract
Background: Autosomal recessive cutis laxa type IC (ARCL IC, MIM: #613177) results from a mutation in the LTBP4 gene (MIM: #604710) on chromosome 19q13., Case Presentation: A 28-day-old Chinese infant with generalized cutis laxa accompanied by impaired pulmonary, gastrointestinal, genitourinary, retinal hemorrhage, abnormality of coagulation and hyperbilirubinemia was admitted to our hospital. To find out the possible causes of these symptoms, whole-exome sequencing was performed on the infant. Two novel pathogenic frame-shift variants [c.605_606delGT (p.Ser204fs * 8) and c.1719delC (p.Arg574fs * 199)] of the LTBP4 gene associated with ARCL IC were found which was later verified by Sanger sequencing. The pathogenicity of mutations was subsequently assessed by several software programs and databases. In addition, an analytical review on the clinical phenotypes of the disease previously reported in literature was performed., Conclusions: This is the first report of a Chinese infant with ARCL IC in China due to novel pathogenic variations of LTBP4. Our study extends the cutis laxa type IC mutation spectrum as well as the phenotypes associated with the disease in different populations.
- Published
- 2020
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