Mohr-Tranebjaerg Syndrome

Categories: Genetic diseases, Rare diseases, Metabolic diseases

Aliases & Classifications for Mohr-Tranebjaerg Syndrome

MalaCards integrated aliases for Mohr-Tranebjaerg Syndrome:

Name: Mohr-Tranebjaerg Syndrome 54 12 23 50 24 71 29 13 52 69
Jensen Syndrome 12 50 24 71 29 13 14 69
Deafness-Dystonia-Optic Neuronopathy Syndrome 23 50 24 25
Deafness Dystonia Syndrome 12 50 14
Deafness-Dystonia Syndrome 23 24 25
Dfn-1 23 24 71
Opticoacoustic Nerve Atrophy with Dementia 12 71
Dds 50 71
Mts 50 71
Deafness Syndrome, Progressive, with Blindness, Dystonia, Fractures, and Mental Deficiency 50
Syndrome of Opticoacoustic Nerve Atrophy with Dementia 50
Deafness - Dystonia - Optic Neuronopathy Syndrome 50
Nerve Deafness Optic Nerve Atrophy, and Dementia 50
Deafness-Dystonia-Optic Neuronopathy Syndrome 50
Deafness Dystonia Optic Neuronopathy Syndrome 12
Opticoacustic Nerve Atrophy with Dementia 50
Deafness Dystonia Optic Atrophy Syndrome 12
Deafness-Dystonia-Optic Atrophy Syndrome 50
Opticoacoustic Nerve Atrophy Dementia 50
X-Linked Progressive Deafness Type 1 71
Dystonia Deafness Syndrome 12
Dystonia-Deafness Syndrome 71
Mohr-Tranebjærg Syndrome 25
Ddon Syndrome 50
Dfn 1 24
Ddon 24
Dfn1 24
Ddp 50



onset in childhood
deafness is presenting symptom

x-linked recessive


mohr-tranebjaerg syndrome:
Onset and clinical course childhood onset
Inheritance x-linked inheritance x-linked recessive inheritance


Summaries for Mohr-Tranebjaerg Syndrome

NIH Rare Diseases : 50 the following summary is from orphanet, a european reference portal for information on rare diseases and orphan drugs.orpha number: 52368disease definitionmohr-tranebjaerg syndrome (mts) is an x-linked recessive neurodegenerative syndrome characterized by clinical manifestations commencing with early childhood onset hearing loss, followed by adolescent onset progressive dystonia or ataxia, visual impairment from early adulthood onwards and dementia from the 4th decade onwards.epidemiologyprevalence is unknown. more than 90 cases (37 families) are known, but not all cases have been reported in the literature.clinical descriptionthe onset of rapidly progressive prelingual or postlingual sensorineural hearing loss, the only typical symptom, occurs in early childhood (18 months). neuropsychologic manifestations, such as personality changes, paranoia, and mild intellectual deficit may emerge at the same time. a slowly progressive movement disorder, appearing as gegenhalten (diffuse resistance to limb movement), dystonia (mostly generalized or focal) or ataxia develops from early adolescence and is associated with brisk tendon reflexes, ankle clonus and extensor plantar responses. patients experience reduced visual acuity, photophobia, acquired color vision defect and central scotomas starting from about 20 years of age and leading to legal blindness at around age 30 to 40. slowly progressive dementia develops from the 4th decade onwards. in those with a contiguous genedeletion syndrome (cgs), recurrent infections may be present. carrier females may be mildly affected with mild hearing impairment and focal dystonia.etiologymts is caused by either a mutation in the timm8a gene (located to xq22) or by a cgs at xq22, resulting in a deafness-dystonia peptide 1 (ddp1) deficiency. if the cgs includes the bruton agammaglobulinemia tyrosine kinase (btk) gene, recurrent infections secondary to this x-linked agammaglobulinemia (xla; see this term) are present.diagnostic methodsa combination of hearing impairment and recurrent infections due to xla in a male patient should elicit sequencing of the timm8a gene. neuroimaging is employed to verify the presence of cerebral atrophy. in cases of suspected cgs; testing for xla is possible.differential diagnosisdifferential diagnosis includes melas syndrome; mitochondrial dna depletion syndrome (encephalomyopathic form with methylmalonic aciduria); arts syndrome; x-linked spinocerebellar ataxia type 3 and 4; mcleod neuroacanthocytosis syndrome; usher syndrome type 1 and 2; wolfram syndrome; autosomal recessive nonsyndromic sensorineural deafness type dfnb; pendred syndrome; and other forms of dystonia or rarely friedreich ataxia (see these terms).antenatal diagnosisprenatal diagnosis may be proposed to affected couples or parents for further pregnancies.genetic counselingmts is transmitted in an x-linked recessive manner. genetic counseling should be provided to affected and treatmenttreatment of mts is symptomatic and evolves over time. hearing aids are used with variable success. for mild hearing loss, a hearing device and cochlear implants are an option whereas hearing aids with visual clues are used in cases with more severe hearing loss. management of dystonia and ataxia includes treatment with gaba β-agonists together with psycho-motor re-education and physical therapy. other supportive measures include therapies for the deaf-blind, addressing progressive sensory deficits, such as tactile sign language. in those with secondary complications, intravenous immunoglobulin may prevent infections in xla. furthermore, live viral vaccines should be avoided in cases of xla. in adulthood, regular neurological evaluation (assessment for dementia and/or psychiatric manifestations) should be maintained.prognosisprognosis is poor. the combination of deafness and blindness severely affects communication, while the ongoing movement disorder results in an increasingly unstable gait. life expectancy is highly variable and can range from death in the teenage years (after a rapidly progressive dystonia) to those that live into their 60's.visit the orphanet disease page for more resources. last updated: 4/20/2013

MalaCards based summary : Mohr-Tranebjaerg Syndrome, also known as jensen syndrome, is related to gorlin bushkell jensen syndrome and mt-cyb-related recurrent myoglobinuria, and has symptoms including visual impairment, optic atrophy and dysphagia. An important gene associated with Mohr-Tranebjaerg Syndrome is TIMM8A (Translocase Of Inner Mitochondrial Membrane 8A), and among its related pathways/superpathways is Mitochondrial protein import. Affiliated tissues include testes, bone and brain.

UniProtKB/Swiss-Prot : 71 Mohr-Tranebjaerg syndrome: An X-linked recessive disorder characterized by postlingual sensorineural deafness with onset in early childhood, dystonia, spasticity, dysphagia, mental deterioration, paranoia and cortical blindness.

Genetics Home Reference : 25 Deafness-dystonia-optic neuronopathy (DDON) syndrome, also known as Mohr-Tranebjærg syndrome, is characterized by hearing loss that begins early in life, problems with movement, impaired vision, and behavior problems. This condition occurs almost exclusively in males.

Disease Ontology : 12 A mitochondrial metabolism disease that is characterized by hearing loss that begins early in life, problems with movement, impaired vision, and behavior problems.

Description from OMIM: 304700
GeneReviews: NBK1216

Related Diseases for Mohr-Tranebjaerg Syndrome

Diseases related to Mohr-Tranebjaerg Syndrome via text searches within MalaCards or GeneCards Suite gene sharing:

(show top 50) (show all 66)
id Related Disease Score Top Affiliating Genes
1 gorlin bushkell jensen syndrome 11.8
2 mt-cyb-related recurrent myoglobinuria 11.7
3 melas, mt-tf-related 11.7
4 melas, mt-th-related 11.7
5 melas, mt-tk-related 11.7
6 melas, mt-tq-related 11.7
7 mt-tt related parkinson disease susceptibility 11.7
8 muir-torre syndrome 11.7
9 dentin dysplasia, type i, with microdontia and misshapen teeth 11.7
10 denys-drash syndrome 11.6
11 dentin dysplasia, type ii 11.6
12 may-thurner syndrome 11.1
13 diabetes and deafness, maternally inherited 10.9
14 diastrophic dysplasia 10.9
15 dissociative disorder 10.8
16 deafness, dystonia, and cerebral hypomyelination 10.8
17 dystonia, juvenile-onset 10.8
18 acrocallosal syndrome 10.7
19 joubert syndrome 14 10.7
20 myoclonic epilepsy associated with ragged-red fibers 10.7
21 chondrodysplasia punctata, tibia-metacarpal type 10.7
22 alzheimer disease mitochondrial 10.7
23 joubert syndrome 6 10.7
24 joubert syndrome 2 10.7
25 infantile histiocytoid cardiomyopathy 10.7
26 dentin dysplasia 10.7
27 darier disease 10.7
28 dystonia 10.6
29 blepharospasm 10.1
30 focal dystonia 10.1
31 lung cancer 10.1
32 protoplasmic astrocytoma 10.0 TIMM13 TIMM8A
33 coronary artery disease 10.0
34 artery disease 10.0
35 acute mountain sickness 9.9
36 endotheliitis 9.9
37 myocardial infarction 9.8
38 breast cancer 9.8
39 tuberculosis 9.8
40 spasticity 9.8
41 myopathy 9.8
42 pancreatitis 9.8
43 leprosy 9.8
44 leigh syndrome 9.7
45 epilepsy 9.7
46 splenic infarction 9.7
47 temporal lobe epilepsy 9.7
48 myotonic dystrophy 9.7
49 heart disease 9.7
50 obesity 9.7

Graphical network of the top 20 diseases related to Mohr-Tranebjaerg Syndrome:

Diseases related to Mohr-Tranebjaerg Syndrome

Symptoms & Phenotypes for Mohr-Tranebjaerg Syndrome

Symptoms via clinical synopsis from OMIM:


Neurologic- Central Nervous System:

Neurologic- Behavioral Psychiatric Manifestations:
behavioral/psychiatric abnormalities

Head And Neck- Eyes:
decreased visual acuity
cortical blindness
constricted visual fields
Head And Neck- Ears:
sensorineural deafness, postlingual, progressive

Clinical features from OMIM:


Human phenotypes related to Mohr-Tranebjaerg Syndrome:

32 (show all 24)
id Description HPO Frequency HPO Source Accession
1 visual impairment 32 HP:0000505
2 optic atrophy 32 HP:0000648
3 dysphagia 32 HP:0002015
4 dystonia 32 HP:0001332
5 dysarthria 32 HP:0001260
6 tremor 32 HP:0001337
7 myopia 32 HP:0000545
8 hyperreflexia 32 HP:0001347
9 spasticity 32 HP:0001257
10 reduced visual acuity 32 HP:0007663
11 cortical visual impairment 32 HP:0100704
12 blindness 32 HP:0000618
13 photophobia 32 HP:0000613
14 generalized amyotrophy 32 HP:0003700
15 dementia 32 HP:0000726
16 mental deterioration 32 HP:0001268
17 increased susceptibility to fractures 32 HP:0002659
18 cerebral calcification 32 HP:0002514
19 abnormal electroretinogram 32 HP:0000512
20 constriction of peripheral visual field 32 HP:0001133
21 abnormal posturing 32 HP:0002533
22 progressive sensorineural hearing impairment 32 HP:0000408
23 postlingual sensorineural hearing impairment 32 HP:0008596
24 infantile sensorineural hearing impairment 32 HP:0008610

UMLS symptoms related to Mohr-Tranebjaerg Syndrome:

dystonia, muscle spasticity, tremor, photophobia

Drugs & Therapeutics for Mohr-Tranebjaerg Syndrome

Search Clinical Trials , NIH Clinical Center for Mohr-Tranebjaerg Syndrome

Genetic Tests for Mohr-Tranebjaerg Syndrome

Genetic tests related to Mohr-Tranebjaerg Syndrome:

id Genetic test Affiliating Genes
1 Mohr-Tranebjaerg Syndrome 29
2 Jensen Syndrome 29
3 Deafness-Dystonia-Optic Neuronopathy Syndrome 24 TIMM8A

Anatomical Context for Mohr-Tranebjaerg Syndrome

MalaCards organs/tissues related to Mohr-Tranebjaerg Syndrome:

Testes, Bone, Brain

Publications for Mohr-Tranebjaerg Syndrome

Articles related to Mohr-Tranebjaerg Syndrome:

(show all 13)
id Title Authors Year
Progressive dystonia in Mohr-Tranebjaerg syndrome with cochlear implant and deep brain stimulation. ( 23801560 )
The phenotypic spectrum of dystonia in Mohr-Tranebjaerg syndrome. ( 22736418 )
A Spanish sporadic case of deafness-dystonia (Mohr-Tranebjaerg) syndrome with a novel mutation in the gene encoding TIMM8a, a component of the mitochondrial protein translocase complexes. ( 18952432 )
Otopathology in Mohr-Tranebjaerg syndrome. ( 17471106 )
Blepharospasm and limb dystonia caused by Mohr-Tranebjaerg syndrome with a novel splice-site mutation in the deafness/dystonia peptide gene. ( 17534980 )
Molecular genetics of a patient with Mohr-Tranebjaerg Syndrome due to a new mutation in the DDP1 gene. ( 17999202 )
A novel mutation in the gene encoding TIMM8a, a component of the mitochondrial protein translocase complexes, in a Spanish familial case of deafness-dystonia (Mohr-Tranebjaerg) syndrome. ( 16411215 )
Focal dystonia caused by Mohr-Tranebjaerg syndrome with complete deletion of the DDP1 gene. ( 15037720 )
Dystonia in the Mohr-Tranebjaerg syndrome responds to GABAergic substances. ( 15390009 )
Temporal bone histopathologic and genetic studies in Mohr-Tranebjaerg syndrome (DFN-1). ( 11449109 )
A novel deafness/dystonia peptide gene mutation that causes dystonia in female carriers of Mohr-Tranebjaerg syndrome. ( 11601506 )
X-linked recessive deafness-dystonia syndrome (Mohr-Tranebjaerg syndrome). ( 10868232 )
Full-field electroretinograms in a family with Mohr-Tranebjaerg syndrome. ( 9017058 )

Variations for Mohr-Tranebjaerg Syndrome

UniProtKB/Swiss-Prot genetic disease variations for Mohr-Tranebjaerg Syndrome:

id Symbol AA change Variation ID SNP ID
1 TIMM8A p.Cys66Trp VAR_010237 rs80356560

ClinVar genetic disease variations for Mohr-Tranebjaerg Syndrome:

id Gene Variation Type Significance SNP ID Assembly Location
1 TIMM8A NM_004085.3(TIMM8A): c.116delT (p.Met39Argfs) deletion Pathogenic rs869320664 GRCh37 Chromosome X, 100603537: 100603537
2 TIMM8A NM_004085.3(TIMM8A): c.148_157delAAGCCTGGGC (p.Lys50Glnfs) deletion Pathogenic rs869320733 GRCh38 Chromosome X, 101346636: 101346645
3 TIMM8A NM_004085.3(TIMM8A): c.70G> T (p.Glu24Ter) single nucleotide variant Pathogenic rs111033631 GRCh37 Chromosome X, 100603583: 100603583
4 TIMM8A NM_004085.3(TIMM8A): c.198C> G (p.Cys66Trp) single nucleotide variant Pathogenic rs80356560 GRCh37 Chromosome X, 100601583: 100601583
5 TIMM8A NM_004085.3(TIMM8A): c.73delG (p.Val25Terfs) deletion Pathogenic rs869320665 GRCh37 Chromosome X, 100603580: 100603580
6 TIMM8A TIMM8A, DEL deletion Pathogenic
7 TIMM8A NM_004085.3(TIMM8A): c.238C> T (p.Arg80Ter) single nucleotide variant Pathogenic rs1054894 GRCh37 Chromosome X, 100601543: 100601543
8 TIMM8A NM_004085.3(TIMM8A): c.133-23A> C single nucleotide variant Pathogenic rs869320666 GRCh37 Chromosome X, 100601671: 100601671
9 TIMM8A NM_004085.3(TIMM8A): c.127delT (p.Cys43Valfs) deletion Pathogenic rs869320667 GRCh37 Chromosome X, 100603526: 100603526
10 TIMM8A NM_004085.3(TIMM8A): c.112C> T (p.Gln38Ter) single nucleotide variant Pathogenic rs80356559 GRCh37 Chromosome X, 100603541: 100603541

Expression for Mohr-Tranebjaerg Syndrome

Search GEO for disease gene expression data for Mohr-Tranebjaerg Syndrome.

Pathways for Mohr-Tranebjaerg Syndrome

Pathways related to Mohr-Tranebjaerg Syndrome according to GeneCards Suite gene sharing:

id Super pathways Score Top Affiliating Genes
1 10.42 TIMM13 TIMM8A

GO Terms for Mohr-Tranebjaerg Syndrome

Biological processes related to Mohr-Tranebjaerg Syndrome according to GeneCards Suite gene sharing:

id Name GO ID Score Top Affiliating Genes
1 protein transport GO:0015031 9.13 GDI1 TIMM13 TIMM8A
2 chaperone-mediated protein transport GO:0072321 8.62 TIMM13 TIMM8A

Sources for Mohr-Tranebjaerg Syndrome

9 Cosmic
10 dbSNP
11 DGIdb
16 ExPASy
18 FMA
28 GO
29 GTR
32 HPO
33 ICD10
34 ICD10 via Orphanet
38 LifeMap
40 MedGen
42 MeSH
43 MESH via Orphanet
44 MGI
46 NCI
47 NCIt
52 Novoseek
55 OMIM via Orphanet
59 PubMed
66 SNOMED-CT via Orphanet
68 Tocris
70 UMLS via Orphanet
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