A Novel Splicing Mutation in the FBN2 Gene in a Family With Congenital Contractural Arachnodactyly.

Journal: Frontiers In Genetics
Published:
Abstract

Congenital contractural arachnodactyly (CCA) is an extremely rare monogenic disorder in humans, and the prevalence of CCA is estimated to be less than 1 in 10,000 worldwide. CCA is characterized by arachnodactyly, camptodactyly, the contracture of major joints, scoliosis, pectus deformities, and crumpled ears. Mutations in FBN2 (which encodes fibrillin-2) are responsible for causing this disease. A family with CCA was investigated in this study, and a novel variant, c.3724+3A > C (also identified as IVS28+3A > C), in FBN2 was found in nine patients from the family but was not found in seven unaffected relatives. Reverse transcription-PCR (RT-PCR) and complementary DNA (cDNA) sequencing data showed that exon 28 was skipped in the FBN2 gene. The FBN2 c.3724+3A > C variant led to an in-frame deletion during transcription, which eventually triggered CCA in the Chinese family.

Authors
Peiwen Xu, Ruirui Li, Sexin Huang, Menghan Sun, Jiaolong Liu, Yuping Niu, Yang Zou, Jie Li, Ming Gao, Xiaolei Li, Xuan Gao, Yuan Gao