Balkan Journal of Medical Genetics

NEXT GENERATION SEQUENCING IDENTIFIED A NOVEL MULTI EXON DELETION OF THE NF1 GENE IN A CHINESE PEDIGREE WITH NEUROFIBROMATOSIS TYPE 1
Yang J, An J-X, Liu X-L, Wang Z-Q, Xie G-M, Yang X-L, Xu S-J, Feng F, Ni Y -- Jie Yang and Jinxia An contributed equally to this study.
*Corresponding Author: Dr. Yali Ni, Gansu Provincial Maternity and Child-Care Hospital, 143 Qilihe North Street, LanZhou, Gansu Province, 730050, People’s Republic of China. Tel.: +86-0931-2231241. E-mail: niyali@126.com
page: 45
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Abstract

Neurofibromatosis type 1 (NF1) is a genetic disease involving neurocutaneous abnormalities. Neurofibromatosis type 1 is an autosomal dominant disorder characterized by the neurofibromas and café-au-lait spots. Mutation in the NF1 gene causes NF1. The NF1 gene encodes neurofibromin. In this study, we found a 31-year-old Chinese boy with NF1. He presented only with café-au-lait spots over the whole body. The proband’s mother had a severe phenotype with neurofibroma and café-au-lait macules over her whole body, mostly in the facial region. A novel multi exon deletion c.(4661+1_4662-1)_(5748+1_ 5749-1)del; [EX36_39DEL] on the NF1 gene has been identified in the proband. Quantitative real-time polymerase chain reaction (qPCR) confirmed that this mutation is co-segregated well and was inherited from the proband’s mother. The mutation was absent in the proband’s father and normal individuals. The novel multi exon deletion results in the formation of a truncated NF1 protein that caused the NF1 phenotype in this family. Our present study also emphasized the significance of rapid, accurate and cost-effective screening for the patient with NF1 by next generation sequencing (NGS).

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