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Published in: Journal of Neurology 6/2019

01-06-2019 | Neuropathic Pain | Original Communication

Dorsal root ganglia volume is increased in patients with the Fabry-related GLA variant p.D313Y

Authors: Tim Godel, Philipp Bäumer, Katharina Stumpfe, Nicole Muschol, Moritz Kronlage, Merle Brunnée, Jennifer Kollmer, Sabine Heiland, Martin Bendszus, Victor-Felix Mautner

Published in: Journal of Neurology | Issue 6/2019

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Abstract

Purpose

To examine dorsal root ganglia and proximal nerve segments in patients carrying the Fabry-related GLA-gene variant p.D313Y in comparison to patients with classical Fabry mutations and healthy controls by morphometric and functional magnetic resonance neurography.

Methods

This prospective multicenter study examines the lumbosacral dorsal root ganglia and sciatic nerve in 11 female p.D313Y patients by a standardized magnetic resonance neurography protocol at 3 T. Volumes of dorsal root ganglia L3 to S2, permeability of dorsal root ganglia L5 and S1, and spinal nerve L5 as well as cross-sectional area of the sciatic nerve were assessed and compared to 10 females carrying a classical Fabry mutation and 16 healthy female controls.

Results

Compared to healthy controls, dorsal root ganglia volumes of p.D313Y females were enlarged by 53% (L3), 48% (L4), 43% (L5), 57% (S1) (p < 0.001), and 55% (S2) (p < 0.05), but less pronounced compared to females carrying a classical Fabry mutation. Compared to healthy controls, p.D313Y patients showed no changes of dorsal root ganglia vascular permeability, while patients with a classical Fabry mutation showed a distinct decrease (p < 0.05). Sciatic nerve cross-sectional area was mildly increased by 6% in p.D313Y as well as in classical Fabry patients (p < 0.05).

Conclusions

Patients carrying the GLA-gene variant p.D313Y show distinctly enlarged dorsal root ganglia, while vascular permeability remains within normal limits. Overall, these alterations partially share characteristics commonly seen in patients with a mutation causing classical FD. This suggests that p.D313Y causes a potentially treatable condition resembling an early stage of Fabry disease.
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Metadata
Title
Dorsal root ganglia volume is increased in patients with the Fabry-related GLA variant p.D313Y
Authors
Tim Godel
Philipp Bäumer
Katharina Stumpfe
Nicole Muschol
Moritz Kronlage
Merle Brunnée
Jennifer Kollmer
Sabine Heiland
Martin Bendszus
Victor-Felix Mautner
Publication date
01-06-2019
Publisher
Springer Berlin Heidelberg
Published in
Journal of Neurology / Issue 6/2019
Print ISSN: 0340-5354
Electronic ISSN: 1432-1459
DOI
https://doi.org/10.1007/s00415-019-09262-8

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