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Review
, 58 (2), 167-177

Untangling the Complexity of Limb-Girdle Muscular Dystrophies

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Review

Untangling the Complexity of Limb-Girdle Muscular Dystrophies

Teerin Liewluck et al. Muscle Nerve.

Abstract

The limb-girdle muscular dystrophies (LGMDs) are a group of genetically heterogeneous, autosomal inherited muscular dystrophies with a childhood to adult onset, manifesting with hip- and shoulder-girdle muscle weakness. When the term LGMD was first conceptualized in 1954, it was thought to be a single entity. Currently, there are 8 autosomal dominant (LGMD1A-1H) and 26 autosomal recessive (LGMD2A-2Z) variants according to the Online Mendelian Inheritance in Man database. In addition, there are other genetically identified muscular dystrophies with an LGMD phenotype not yet classified as LGMD. This highlights the entanglement of LGMDs, which represents an area in continuous expansion. Herein we aim to simplify the complexity of LGMDs by subgrouping them on the basis of the underlying defective protein and impaired function. Muscle Nerve 58: 167-177, 2018.

Keywords: LGMD; Z-disk proteinopathies; calpainopathy; caveolae-associated muscular dystrophies; limb-girdle muscular dystrophies; muscular dystrophies with defective membrane repair; myofibrillar myopathy; nuclear envelopathies; sarcoglycanopathies; α-dystroglycanopathies.

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