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The treatment of juvenile/adult GM1-gangliosidosis with Miglustat may reverse disease progression

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Abstract

Juvenile and adult GM1-gangliosidosis are invariably characterized by progressive neurological deterioration. To date only symptomatic therapies are available. We report for the first time the positive results of Miglustat (OGT 918, N-butyl-deoxynojirimycin) treatment on three Italian GM1-gangliosidosis patients. The first two patients had a juvenile form (enzyme activity ≤5%, GLB1 genotype p.R201H/c.1068 + 1G > T; p.R201H/p.I51N), while the third patient had an adult form (enzyme activity about 7%, p.T329A/p.R442Q). Treatment with Miglustat at the dose of 600 mg/day was started at the age of 10, 17 and 28 years; age at last evaluation was 21, 20 and 38 respectively. Response to treatment was evaluated using neurological examinations in all three patients every 4–6 months, the assessment of Movement Disorder-Childhood Rating Scale (MD-CRS) in the second patient, and the 6-Minute Walking Test (6-MWT) in the third patient. The baseline neurological status was severely impaired, with loss of autonomous ambulation and speech in the first two patients, and gait and language difficulties in the third patient. All three patients showed gradual improvement while being treated; both juvenile patients regained the ability to walk without assistance for few meters, and increased alertness and vocalization. The MD-CRS class score in the second patient decreased from 4 to 2. The third patient improved in movement and speech control, the distance covered during the 6-MWT increased from 338 to 475 m. These results suggest that Miglustat may help slow down or reverse the disease progression in juvenile/adult GM1-gangliosidosis.

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Abbreviations

6-MWT:

6-Minute Walking Test; LSD lysosomal storage disorder

CSF:

Cerebral spinal fluid

EEG:

Electroencephalogram

GSL:

Glycosphingolipid

IQ:

Intelligent quotient

MD-CRS:

Movement Disorder-Childhood Rating Scale

MRI:

Magnetic Resonance Imaging

NB-DGJ:

butyldeoxygalactonojirimycin

NB-DNJ:

N-butyldeoxynojirimycin

SRT:

Substrate reduction therapy

WAIS:

Wechsler Adult Intelligent Scale

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Acknowledgements

We thank the patients and their families for their collaboration and the permission to publish data and video. We thank Actelion Pharmaceuticals for support authors meetings.

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Correspondence to Anna Caciotti.

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The authors declare that they have no competing interests.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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Additional file 1

Video of patient 1. Segment 1 shows patient 1 at age 9, before diagnosis; because of a severe movement disorder she had great difficulty in taking a small step and getting up from a sitting position. After one year of therapy, the patient could descend the stairs holding the banister (segment 2); she resumed the ability to stand up (segment 3), to bike a few meters (segment 4), and to eat independently (segment 5). (AVI 38814 kb)

Additional file 2

Video of patient 2. After two months of treatment she was able to stand up from a chair with support (segment 1); after four months of therapy she made some attempts to speak, through vocalizations and monosyllables (segment 2), and she walked a few steps with assistance (segment 3). Segment 4 shows the patient at age 20 (after two years of treatment). She is able to walk alone for a few meters indoors; she is still hypokinetic and rigid, but her start hesitation is less evident. (AVI 34368 kb)

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Deodato, F., Procopio, E., Rampazzo, A. et al. The treatment of juvenile/adult GM1-gangliosidosis with Miglustat may reverse disease progression. Metab Brain Dis 32, 1529–1536 (2017). https://doi.org/10.1007/s11011-017-0044-y

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  • DOI: https://doi.org/10.1007/s11011-017-0044-y

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