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2016 ; 39
(5
): 382-8
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Identification of Genetic Causes of Inherited Peripheral Neuropathies by Targeted
Gene Panel Sequencing
#MMPMID27025386
Nam SH
; Hong YB
; Hyun YS
; Nam da E
; Kwak G
; Hwang SH
; Choi BO
; Chung KW
Mol Cells
2016[May]; 39
(5
): 382-8
PMID27025386
show ga
Inherited peripheral neuropathies (IPN), which are a group of clinically and
genetically heterogeneous peripheral nerve disorders including
Charcot-Marie-Tooth disease (CMT), exhibit progressive degeneration of muscles in
the extremities and loss of sensory function. Over 70 genes have been reported as
genetic causatives and the number is still growing. We prepared a targeted gene
panel for IPN diagnosis based on next generation sequencing (NGS). The gene panel
was designed to detect mutations in 73 genes reported to be genetic causes of IPN
or related peripheral neuropathies, and to detect duplication of the chromosome
17p12 region, the major genetic cause of CMT1A. We applied the gene panel to 115
samples from 63 non-CMT1A families, and isolated 15 pathogenic or
likely-pathogenic mutations in eight genes from 25 patients (17 families). Of
them, eight mutations were unreported variants. Of particular interest, this
study revealed several very rare mutations in the SPTLC2, DCTN1, and MARS genes.
In addition, the effectiveness of the detection of CMT1A was confirmed by
comparing five 17p12-nonduplicated controls and 15 CMT1A cases. In conclusion, we
developed a gene panel for one step genetic diagnosis of IPN. It seems that its
time- and cost-effectiveness are superior to previous tiered-genetic diagnosis
algorithms, and it could be applied as a genetic diagnostic system for inherited
peripheral neuropathies.