Distal hereditary motor neuropathies (dHMN) comprise a heterogenous group of diseases that share the common feature of a length-dependent predominantly motor neuropathy. Many forms of dHMN have minor sensory abnormalities and/or a significant upper-motor-neuron component, and there is often an overlap with the axonal forms of Charcot-Marie-Tooth disease (CMT) [DS:H00264] and with juvenile forms of amyotrophic lateral sclerosis [DS:H00058] and hereditary spastic paraplegia [DS:H00266]. The causative genes with autosomal dominant, recessive, and X-linked patterns of inheritance have implicated proteins with diverse functions. Distal HMN are classified into phenotypic subtypes according to age at onset, mode of inheritance, and presence of additional features.
Category
Nervous system disease
Brite
Human diseases [BR:br08402]
Nervous system diseases
Neurodegenerative diseases
H00856 Distal hereditary motor neuropathies
Human diseases in ICD-11 classification [BR:br08403]
08 Diseases of the nervous system
Motor neuron diseases or related disorders
8B61 Spinal muscular atrophy
H00856 Distal hereditary motor neuropathies
Network
nt06515 Regulation of kinetochore-microtubule interactions
Autosomal dominant inheritance include distal HMN1 and 2, characterized by juvenile and adult onset, respectively; HMN5, characterized by upper limb involvement; HMN7, with vocal cord paralysis; and HMN8. HMN has also been referred to as distal spinal muscular atrophy (DSMA). DSMA here refers to the autosomal recessive forms of HMN.
See also H00455 Spinal muscular atrophy (SMA).
Irobi J, Van Impe K, Seeman P, Jordanova A, Dierick I, Verpoorten N, Michalik A, De Vriendt E, Jacobs A, Van Gerwen V, Vennekens K, Mazanec R, Tournev I, Hilton-Jones D, Talbot K, Kremensky I, Van Den Bosch L, Robberecht W, Van Vandekerckhove J, Van Broeckhoven C, Gettemans J, De Jonghe P, Timmerman V
Title
Hot-spot residue in small heat-shock protein 22 causes distal motor neuropathy.
Evgrafov OV, Mersiyanova I, Irobi J, Van Den Bosch L, Dierick I, Leung CL, Schagina O, Verpoorten N, Van Impe K, Fedotov V, Dadali E, Auer-Grumbach M, Windpassinger C, Wagner K, Mitrovic Z, Hilton-Jones D, Talbot K, Martin JJ, Vasserman N, Tverskaya S, Polyakov A, Liem RK, Gettemans J, Robberecht W, De Jonghe P, Timmerman V
Title
Mutant small heat-shock protein 27 causes axonal Charcot-Marie-Tooth disease and distal hereditary motor neuropathy.
Antonellis A, Ellsworth RE, Sambuughin N, Puls I, Abel A, Lee-Lin SQ, Jordanova A, Kremensky I, Christodoulou K, Middleton LT, Sivakumar K, Ionasescu V, Funalot B, Vance JM, Goldfarb LG, Fischbeck KH, Green ED
Title
Glycyl tRNA synthetase mutations in Charcot-Marie-Tooth disease type 2D and distal spinal muscular atrophy type V.
Beetz C, Pieber TR, Hertel N, Schabhuttl M, Fischer C, Trajanoski S, Graf E, Keiner S, Kurth I, Wieland T, Varga RE, Timmerman V, Reilly MM, Strom TM, Auer-Grumbach M
Title
Exome sequencing identifies a REEP1 mutation involved in distal hereditary motor neuropathy type V.
Windpassinger C, Auer-Grumbach M, Irobi J, Patel H, Petek E, Horl G, Malli R, Reed JA, Dierick I, Verpoorten N, Warner TT, Proukakis C, Van den Bergh P, Verellen C, Van Maldergem L, Merlini L, De Jonghe P, Timmerman V, Crosby AH, Wagner K
Title
Heterozygous missense mutations in BSCL2 are associated with distal hereditary motor neuropathy and Silver syndrome.