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Brain dopamine-serotonin vesicular transport disease

The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs.
orphanet

Orpha Number: 352649

Definition
A rare infantile-onset neurometabolic disease characterized by dystonia, parkinsonism, nonambulation, autonomic dysfunction, developmental delay and mood disturbances.

Epidemiology
The prevalence is unknown. It has been described in 8 patients from one Saudi Arabian family to date.

Clinical description
Disease onset presents in infancy with hypotonia, loss of acquired head control and persistent crying and eye deviation. Motor development is delayed and later manifestations include severe parkinsonism, dystonia, ataxia, oculogyric crises, sleep and mood disturbances, temperature instability, excessive diaphoresis, ptosis and postural hypotension. Symptoms show no diurnal variation, do not improve with intake of vitamin B12 or folinic acid and worsened after administration of L-dopa.

Etiology
Brain dopamine-serotonin vesicular transport disease is caused by a mutation in the SLC18A2 gene (10q25), encoding the vesicular monoamine transporter 2 (VMAT2) which is responsible for the transport of dopamine and serotonin into synaptic vesicles. Mutations in this gene lead to the impairment of VMAT2 and consequently to problems with motor control, autonomic functioning and mood regulation.

Genetic counseling
It is inherited in an autosomal recessive manner, and genetic counseling is recommended.

Visit the Orphanet disease page for more resources.
Last updated: 11/1/2013

This table lists symptoms that people with this disease may have. For most diseases, symptoms will vary from person to person. People with the same disease may not have all the symptoms listed. This information comes from a database called the Human Phenotype Ontology (HPO) . The HPO collects information on symptoms that have been described in medical resources. The HPO is updated regularly. Use the HPO ID to access more in-depth information about a symptom.

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Medical Terms Other Names
Learn More:
HPO ID
80%-99% of people have these symptoms
Abnormality of eye movement
Abnormal eye movement
Abnormal eye movements
Eye movement abnormalities
Eye movement issue
[ more ] 		0000496
Abnormality of the foot
Abnormal feet morphology
Abnormality of the feet
Foot deformities
Foot deformity
[ more ] 		0001760
Abnormality of the vasculature
Abnormality of blood vessels
Vascular abnormalities
[ more ] 		0002597
Cognitive impairment
Abnormality of cognition
Cognitive abnormality
Cognitive defects
Cognitive deficits
Intellectual impairment
Mental impairment
[ more ] 		0100543
Dysarthria
Difficulty articulating speech
0001260
Dysdiadochokinesis
Difficulty performing quick and alternating movements
0002075
Fatigue
Tired
Tiredness
[ more ] 		0012378
Generalized hypotonia
Decreased muscle tone
Low muscle tone
[ more ] 		0001290
Global developmental delay 0001263
Hyperhidrosis
Excessive sweating
Increased sweating
Profuse sweating
Sweating
Sweating profusely
Sweating, increased
[ more ] 		0000975
Hypomimic face
Dull facial expression
0000338
Inappropriate crying 0030215
Limb dystonia 0002451
Muscular hypotonia of the trunk
Low muscle tone in trunk
0008936
Nasal speech
Nasal voice
0001611
Oculogyric crisis 0010553
Orofacial dyskinesia 0002310
Parkinsonism 0001300
Poor head control 0002421
Postnatal microcephaly 0005484
Ptosis
Drooping upper eyelid
0000508
Shuffling gait
Shuffled walk
0002362
Sleep disturbance
Difficulty sleeping
Trouble sleeping
[ more ] 		0002360
Spastic tetraparesis 0001285
Stridor 0010307
Tremor 0001337
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Last updated: 7/1/2020

These resources provide more information about this condition or associated symptoms. The in-depth resources contain medical and scientific language that may be hard to understand. You may want to review these resources with a medical professional.

In-Depth Information

  • Orphanet is a European reference portal for information on rare diseases and orphan drugs. Access to this database is free of charge.

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