Muscular dystrophies due to reduced glycosylation of alpha-dystroglycan have emerged as a common group of conditions, now referred to as dystroglycanopathies. The phenotypic severity of dystroglycanopathy patients is extremely variable. The most severe clinical spectrum (type A, H00120) is characterized by congenital muscular dystrophy with severe structural brain and eye abnormalities. Conversely, the mildest clinical spectrum (type C, H01959) is with limb-girdle muscular dystrophy. Muscular dystrophy-dystroglycanopathy type B (MDDGB) is an intermediate phenotype between type A and C. MDDGB is characterized by early onset of muscle weakness, mental retardation, and mild brain anomalies.
Category
Inherited metabolic disorder
Brite
Human diseases in ICD-11 classification [BR:br08403]
08 Diseases of the nervous system
Diseases of neuromuscular junction or muscle
Primary disorders of muscles
8C70 Muscular dystrophy
H01960 Muscular dystrophy-dystroglycanopathy type B
Pathway-based classification of diseases [BR:br08402]
Glycan/glycoprotein metabolism
nt06013 O-Glycan biosynthesis
H01960 Muscular dystrophy-dystroglycanopathy type B
Godfrey C, Clement E, Mein R, Brockington M, Smith J, Talim B, Straub V, Robb S, Quinlivan R, Feng L, Jimenez-Mallebrera C, Mercuri E, Manzur AY, Kinali M, Torelli S, Brown SC, Sewry CA, Bushby K, Topaloglu H, North K, Abbs S, Muntoni F
Title
Refining genotype phenotype correlations in muscular dystrophies with defective glycosylation of dystroglycan.
Clement E, Mercuri E, Godfrey C, Smith J, Robb S, Kinali M, Straub V, Bushby K, Manzur A, Talim B, Cowan F, Quinlivan R, Klein A, Longman C, McWilliam R, Topaloglu H, Mein R, Abbs S, North K, Barkovich AJ, Rutherford M, Muntoni F
Title
Brain involvement in muscular dystrophies with defective dystroglycan glycosylation.
Mercuri E, Messina S, Bruno C, Mora M, Pegoraro E, Comi GP, D'Amico A, Aiello C, Biancheri R, Berardinelli A, Boffi P, Cassandrini D, Laverda A, Moggio M, Morandi L, Moroni I, Pane M, Pezzani R, Pichiecchio A, Pini A, Minetti C, Mongini T, Mottarelli E, Ricci E, Ruggieri A, Saredi S, Scuderi C, Tessa A, Toscano A, Tortorella G, Trevisan CP, Uggetti C, Vasco G, Santorelli FM, Bertini E
Title
Congenital muscular dystrophies with defective glycosylation of dystroglycan: a population study.
Brockington M, Blake DJ, Prandini P, Brown SC, Torelli S, Benson MA, Ponting CP, Estournet B, Romero NB, Mercuri E, Voit T, Sewry CA, Guicheney P, Muntoni F
Title
Mutations in the fukutin-related protein gene (FKRP) cause a form of congenital muscular dystrophy with secondary laminin alpha2 deficiency and abnormal glycosylation of alpha-dystroglycan.
Longman C, Brockington M, Torelli S, Jimenez-Mallebrera C, Kennedy C, Khalil N, Feng L, Saran RK, Voit T, Merlini L, Sewry CA, Brown SC, Muntoni F
Title
Mutations in the human LARGE gene cause MDC1D, a novel form of congenital muscular dystrophy with severe mental retardation and abnormal glycosylation of alpha-dystroglycan.
Carss KJ, Stevens E, Foley AR, Cirak S, Riemersma M, Torelli S, Hoischen A, Willer T, van Scherpenzeel M, Moore SA, Messina S, Bertini E, Bonnemann CG, Abdenur JE, Grosmann CM, Kesari A, Punetha J, Quinlivan R, Waddell LB, Young HK, Wraige E, Yau S, Brodd L, Feng L, Sewry C, MacArthur DG, North KN, Hoffman E, Stemple DL, Hurles ME, van Bokhoven H, Campbell KP, Lefeber DJ, Lin YY, Muntoni F
Title
Mutations in GDP-mannose pyrophosphorylase B cause congenital and limb-girdle muscular dystrophies associated with hypoglycosylation of alpha-dystroglycan.
