Format

Send to

Choose Destination
Sci Rep. 2018 Feb 2;8(1):2324. doi: 10.1038/s41598-018-19865-2.

Mutant torsinA in the heterozygous DYT1 state compromises HSV propagation in infected neurons and fibroblasts.

Author information

1
Molecular Neurogenetics Unit, Department of Neurology and Center for Molecular Imaging Research, Department of Radiology, Massachusetts General Hospital and Program in Neuroscience, Harvard Medical School, Boston, MA, 02114, USA.
2
Department of Neurobiology, Harvard Medical School, Boston, MA, 02115, USA.
3
Department of Cell Biology, Harvard Medical School, Boston, MA, 02115, USA.
4
Institute of Virology, University of Zurich, Zurich, 8057, Switzerland.
5
Department of Neurology, College of Medicine, University of Florida, Gainesville, FL, 32610, USA.
6
Department of Neurology, Massachusetts General Hospital, Massachusetts General Institute of Neurodegenerative Diseases (MIND), Charlestown, MA, 02129, USA.
7
Massachusetts Alzheimer Disease Research Center, Charlestown, MA, 02129, USA.
8
Molecular Neurogenetics Unit, Department of Neurology and Center for Molecular Imaging Research, Department of Radiology, Massachusetts General Hospital and Program in Neuroscience, Harvard Medical School, Boston, MA, 02114, USA. breakefield@hms.harvard.edu.

Abstract

Most cases of early onset torsion dystonia (DYT1) are caused by a 3-base pair deletion in one allele of the TOR1A gene causing loss of a glutamate in torsinA, a luminal protein in the nuclear envelope. This dominantly inherited neurologic disease has reduced penetrance and no other medical manifestations. It has been challenging to understand the neuronal abnormalities as cells and mouse models which are heterozygous (Het) for the mutant allele are quite similar to wild-type (WT) controls. Here we found that patient fibroblasts and mouse neurons Het for this mutation showed significant differences from WT cells in several parameters revealed by infection with herpes simplex virus type 1 (HSV) which replicates in the nucleus and egresses out through the nuclear envelope. Using a red fluorescent protein capsid to monitor HSV infection, patient fibroblasts showed decreased viral plaque formation as compared to controls. Mouse Het neurons had a decrease in cytoplasmic, but not nuclear HSV fluorescence, and reduced numbers of capsids entering axons as compared to infected WT neurons. These findings point to altered dynamics of the nuclear envelope in cells with the patient genotype, which can provide assays to screen for therapeutic agents that can normalize these cells.

PMID:
29396398
PMCID:
PMC5797141
DOI:
10.1038/s41598-018-19865-2
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for Nature Publishing Group Icon for PubMed Central
Loading ...
Support Center