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Autosomal dominant mitochondrial myopathy with exercise intolerance(IMMD)

MedGen UID:
863950
Concept ID:
C4015513
Disease or Syndrome
Synonyms: IMMD; Myopathy, isolated mitochondrial, autosomal dominant
SNOMED CT: Autosomal dominant mitochondrial myopathy with exercise intolerance (1222644009)
Modes of inheritance:
Autosomal dominant inheritance
MedGen UID:
141047
Concept ID:
C0443147
Intellectual Product
Source: Orphanet
A mode of inheritance that is observed for traits related to a gene encoded on one of the autosomes (i.e., the human chromosomes 1-22) in which a trait manifests in heterozygotes. In the context of medical genetics, an autosomal dominant disorder is caused when a single copy of the mutant allele is present. Males and females are affected equally, and can both transmit the disorder with a risk of 50% for each child of inheriting the mutant allele.
 
Gene (location): CHCHD10 (22q11.23)
 
Monarch Initiative: MONDO:0014532
OMIM®: 616209
Orphanet: ORPHA457050

Disease characteristics

Excerpted from the GeneReview: CHCHD10-Related Disorders
CHCHD10-related disorders are characterized by a spectrum of adult-onset neurologic phenotypes that can include: Mitochondrial myopathy (may also be early onset): weakness, amyotrophy, exercise intolerance. Amyotrophic lateral sclerosis (ALS): progressive degeneration of upper motor neurons and lower motor neurons. Frontotemporal dementia (FTD): slowly progressive behavioral changes, language disturbances, cognitive decline, extrapyramidal signs. Late-onset spinal motor neuronopathy (SMA, Jokela type): weakness, cramps, and/or fasciculations; areflexia. Axonal Charcot-Marie-Tooth neuropathy: slowly progressive lower-leg muscle weakness and atrophy, small hand muscle weakness, loss of tendon reflexes, sensory abnormalities. Cerebellar ataxia: gait ataxia, kinetic ataxia (progressive loss of coordination of lower- and upper-limb movements), dysarthria/dysphagia, nystagmus, cerebellar oculomotor disorder. Because of the recent discovery of CHCHD10-related disorders and the limited number of affected individuals reported to date, the natural history of these disorders (except for SMAJ caused by the p.Gly66Val pathogenic variant) is largely unknown. [from GeneReviews]
Authors:
Samira Ait-El-Mkadem Saadi  |  Annabelle Chaussenot  |  Sylvie Bannwarth, et. al.   view full author information

Additional description

From OMIM
Autosomal dominant isolated mitochondrial myopathy (IMMD) is characterized by onset of proximal lower limb weakness and exercise intolerance in the first decade of life. The disorder is slowly progressive, with later involvement of facial muscles, muscles of the upper limbs, and distal muscles. Patients may also have respiratory compromise (Heiman-Patterson et al., 1997) or develop severe fatal cardiomyopathy (Shammas et al., 2022).  http://www.omim.org/entry/616209

Clinical features

From HPO
Exercise intolerance
MedGen UID:
603270
Concept ID:
C0424551
Finding
A functional motor deficit where individuals whose responses to the challenges of exercise fail to achieve levels considered normal for their age and gender.
Short stature
MedGen UID:
87607
Concept ID:
C0349588
Finding
A height below that which is expected according to age and gender norms. Although there is no universally accepted definition of short stature, many refer to "short stature" as height more than 2 standard deviations below the mean for age and gender (or below the 3rd percentile for age and gender dependent norms).
Facial palsy
MedGen UID:
87660
Concept ID:
C0376175
Disease or Syndrome
Facial nerve palsy is a dysfunction of cranial nerve VII (the facial nerve) that results in inability to control facial muscles on the affected side with weakness of the muscles of facial expression and eye closure. This can either be present in unilateral or bilateral form.
Neck flexor weakness
MedGen UID:
334801
Concept ID:
C1843637
Finding
Weakness of the muscles involved in neck flexion (sternocleidomastoid, longus capitus, longus colli, and scalenus anterior).
Proximal muscle weakness in lower limbs
MedGen UID:
356423
Concept ID:
C1866010
Finding
A lack of strength of the proximal muscles of the legs.
Ragged-red muscle fibers
MedGen UID:
477048
Concept ID:
C3275417
Finding
An abnormal appearance of muscle fibers observed on muscle biopsy. Ragged red fibers can be visualized with Gomori trichrome staining as irregular and intensely red subsarcolemmal zones, whereas the normal myofibrils are green. The margins of affect fibers appear red and ragged. The ragged-red is due to the accumulation of abnormal mitochondria below the plasma membrane of the muscle fiber, leading to the appearance of a red rim and speckled sarcoplasm.
Elevated circulating creatine kinase concentration
MedGen UID:
69128
Concept ID:
C0241005
Finding
An elevation of the level of the enzyme creatine kinase (also known as creatine phosphokinase (CK; EC 2.7.3.2) in the blood. CK levels can be elevated in a number of clinical disorders such as myocardial infarction, rhabdomyolysis, and muscular dystrophy.
Increased circulating lactate concentration
MedGen UID:
332209
Concept ID:
C1836440
Finding
Abnormally increased level of blood lactate (2-hydroxypropanoic acid). Lactate is produced from pyruvate by lactate dehydrogenase during normal metabolism. The terms lactate and lactic acid are often used interchangeably but lactate (the component measured in blood) is strictly a weak base whereas lactic acid is the corresponding acid. Lactic acidosis is often used clinically to describe elevated lactate but should be reserved for cases where there is a corresponding acidosis (pH below 7.35).
Decreased activity of mitochondrial complex III
MedGen UID:
460434
Concept ID:
C3149083
Finding
A reduction in the activity of the mitochondrial respiratory chain complex III, which is part of the electron transport chain in mitochondria.
Decreased activity of mitochondrial complex IV
MedGen UID:
866520
Concept ID:
C4020800
Finding
A reduction in the activity of the mitochondrial respiratory chain complex IV, which is part of the electron transport chain in mitochondria.
Decreased activity of mitochondrial complex II
MedGen UID:
892305
Concept ID:
C4024705
Finding
A reduction in the activity of the mitochondrial respiratory chain complex II, which is part of the electron transport chain in mitochondria.

Term Hierarchy

CClinical test,  RResearch test,  OOMIM,  GGeneReviews,  VClinVar  
  • CROGVAutosomal dominant mitochondrial myopathy with exercise intolerance

Recent clinical studies

Etiology

Milone M, Massie R
Neurologist 2010 Mar;16(2):84-91. doi: 10.1097/NRL.0b013e3181c78a89. PMID: 20220442

Diagnosis

Martin-Negrier ML, Sole G, Jardel C, Vital C, Ferrer X, Vital A
Eur J Neurol 2011 Mar;18(3):436-41. Epub 2010 Sep 29 doi: 10.1111/j.1468-1331.2010.03171.x. PMID: 20880070
Walter MC, Czermin B, Muller-Ziermann S, Bulst S, Stewart JD, Hudson G, Schneiderat P, Abicht A, Holinski-Feder E, Lochmüller H, Chinnery PF, Klopstock T, Horvath R
J Neurol 2010 Sep;257(9):1517-23. Epub 2010 Apr 20 doi: 10.1007/s00415-010-5565-9. PMID: 20405137

Therapy

Heiman-Patterson TD, Argov Z, Chavin JM, Kalman B, Alder H, DiMauro S, Bank W, Tahmoush AJ
Muscle Nerve 1997 Oct;20(10):1219-24. doi: 10.1002/(sici)1097-4598(199710)20:10<1219::aid-mus2>3.0.co;2-f. PMID: 9324076

Clinical prediction guides

Reyes A, Melchionda L, Nasca A, Carrara F, Lamantea E, Zanolini A, Lamperti C, Fang M, Zhang J, Ronchi D, Bonato S, Fagiolari G, Moggio M, Ghezzi D, Zeviani M
Am J Hum Genet 2015 Jul 2;97(1):186-93. Epub 2015 Jun 18 doi: 10.1016/j.ajhg.2015.05.013. PMID: 26094573Free PMC Article
Martin-Negrier ML, Sole G, Jardel C, Vital C, Ferrer X, Vital A
Eur J Neurol 2011 Mar;18(3):436-41. Epub 2010 Sep 29 doi: 10.1111/j.1468-1331.2010.03171.x. PMID: 20880070

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