Abstract:
:Variants in the ATL1 gene have been repeatedly described as the second most frequent cause of hereditary spastic paraplegia (HSP), a motor neuron disease manifested by progressive lower limb spasticity and weakness. Variants in ATL1 have been described mainly in patients with early onset HSP. We performed Sanger sequencing of all coding exons and adjacent intron regions of the ALT1 gene in 111 Czech patients with pure form of HSP and additional Multiplex-Ligation Probe Analysis (MLPA) testing targeting the ATL1 gene in 56 of them. All patients except seven were previously tested by Sanger sequencing of the SPAST gene with negative results. ATL1 diagnostic testing revealed only five missense variants in the ATL1 gene. Four of them are novel, but we suppose only two of them to be pathogenic and causal. The remaining variants are assumed to be benign. MLPA testing in 56 of sequence variant negative patients revealed no gross deletion in the ATL1 gene. Variants in the ATL1 gene are more frequent in patients with early onset HSP, but in general the occurrence of pathogenic variants in the ATL1 gene is low in our cohort, less than 4.5% and less than 11.1% in patients with onset before the age of ten. Variants in the ATL1 gene are a less frequent cause of HSP among Czech patients than has been previously reported among other populations.
journal_name
Ann Hum Genetjournal_title
Annals of human geneticsauthors
Mészárosová AU,Grečmalová D,Brázdilová M,Dvořáčková N,Kalina Z,Čermáková M,Vávrová D,Smetanová I,Staněk D,Seeman Pdoi
10.1111/ahg.12206subject
Has Abstractpub_date
2017-11-01 00:00:00pages
249-257issue
6eissn
0003-4800issn
1469-1809journal_volume
81pub_type
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