Pauly, Martje G;
Brüggemann, Norbert;
Efthymiou, Stephanie;
Grözinger, Anne;
Diaw, Sokhna Haissatou;
Chelban, Viorica;
Turchetti, Valentina;
... Lohmann, Katja; + view all
(2023)
Not to Miss: Intronic Variants, Treatment, and Review of the Phenotypic Spectrum in VPS13D-Related Disorder.
International Journal of Molecular Sciences
, 24
(3)
, Article 1874. 10.3390/ijms24031874.
Preview |
Text
ijms-24-01874-v2.pdf - Published Version Download (4MB) | Preview |
Abstract
VPS13D is one of four human homologs of the vacuolar sorting protein 13 gene (VPS13). Biallelic pathogenic variants in the gene are associated with spastic ataxia or spastic paraplegia. Here, we report two patients with intronic pathogenic variants: one patient with early onset severe spastic ataxia and debilitating tremor, which is compound-heterozygous for a canonical (NM_018156.4: c.2237−1G > A) and a non-canonical (NM_018156.4: c.941+3G>A) splice site variant. The second patient carries the same non-canonical splice site variant in the homozygous state and is affected by late-onset spastic paraplegia. We confirmed altered splicing as a result of the intronic variants and demonstrated disturbed mitochondrial integrity. Notably, tremor in the first patient improved significantly by bilateral deep brain stimulation (DBS) in the ventralis intermedius (VIM) nucleus of the thalamus. We also conducted a literature review and summarized the phenotypical spectrum of reported VPS13D-related disorders. Our study underscores that looking for mutations outside the canonical splice sites is important not to miss a genetic diagnosis, especially in disorders with a highly heterogeneous presentation without specific red flags.
| Type: | Article |
|---|---|
| Title: | Not to Miss: Intronic Variants, Treatment, and Review of the Phenotypic Spectrum in VPS13D-Related Disorder |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3390/ijms24031874 |
| Publisher version: | https://doi.org/10.3390/ijms24031874 |
| Language: | English |
| Additional information: | © 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
| Keywords: | VPS13D; spastic ataxia; deep brain stimulation |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Department of Neuromuscular Diseases |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10164447 |
Archive Staff Only
 |
View Item |
