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Current Classification of Canine Muscular Dystrophies and Identification of New Variants. 2023

G Diane Shelton, and Katie M Minor, and Steven G Friedenberg, and Jonah N Cullen, and Ling T Guo, and James R Mickelson
Department of Pathology, School of Medicine, University of California San Diego, La Jolla, CA 92093, USA.

The spectrum of canine muscular dystrophies has rapidly grown with the recent identification of several more affected breeds and associated mutations. Defects include those in genes and protein products associated with the sarcolemma (dystrophin deficient X-linked muscular dystrophy and sarcoglycan-deficient limb-girdle muscular dystrophy) and with the extracellular matrix (collagen 6, laminin α2, and α-dystroglycan-deficient congenital muscular dystrophies). With the increasing application of whole genome sequencing and whole exome sequencing, the clinical and pathological spectra associated with specific neuromuscular genetic defects are constantly evolving. In this report, we provide a brief overview of the current status of gene defects reported in canine muscular dystrophies. We also report the causative mutations for novel forms of X-linked muscular dystrophy in Brittany spaniels and in a French bulldog.

UI MeSH Term Description Entries
D007797 Laminin Large, noncollagenous glycoprotein with antigenic properties. It is localized in the basement membrane lamina lucida and functions to bind epithelial cells to the basement membrane. Evidence suggests that the protein plays a role in tumor invasion. Merosin,Glycoprotein GP-2,Laminin M,Laminin M Chain,Chain, Laminin M,Glycoprotein GP 2,M Chain, Laminin
D009154 Mutation Any detectable and heritable change in the genetic material that causes a change in the GENOTYPE and which is transmitted to daughter cells and to succeeding generations. Mutations
D004285 Dogs The domestic dog, Canis familiaris, comprising about 400 breeds, of the carnivore family CANIDAE. They are worldwide in distribution and live in association with people. (Walker's Mammals of the World, 5th ed, p1065) Canis familiaris,Dog
D005109 Extracellular Matrix A meshwork-like substance found within the extracellular space and in association with the basement membrane of the cell surface. It promotes cellular proliferation and provides a supporting structure to which cells or cell lysates in culture dishes adhere. Matrix, Extracellular,Extracellular Matrices,Matrices, Extracellular
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D049288 Muscular Dystrophies, Limb-Girdle A heterogenous group of inherited muscular dystrophy that can be autosomal dominant or autosomal recessive. There are many forms (called LGMDs) involving genes encoding muscle membrane proteins such as the sarcoglycan (SARCOGLYCANS) complex that interacts with DYSTROPHIN. The disease is characterized by progressing wasting and weakness of the proximal muscles of arms and legs around the HIPS and SHOULDERS (the pelvic and shoulder girdles). Limb-Girdle Muscular Dystrophies,Limb-Girdle Muscular Dystrophy,Limb-Girdle Syndrome,Muscular Dystrophy, Limb-Girdle,Myopathic Limb-Girdle Syndrome,Limb Girdle Muscular Dystrophies,Limb Girdle Muscular Dystrophy,Muscular Dystrophies, Limb Girdle,Muscular Dystrophy, Limb Girdle
D020388 Muscular Dystrophy, Duchenne An X-linked recessive muscle disease caused by an inability to synthesize DYSTROPHIN, which is involved with maintaining the integrity of the sarcolemma. Muscle fibers undergo a process that features degeneration and regeneration. Clinical manifestations include proximal weakness in the first few years of life, pseudohypertrophy, cardiomyopathy (see MYOCARDIAL DISEASES), and an increased incidence of impaired mentation. Becker muscular dystrophy is a closely related condition featuring a later onset of disease (usually adolescence) and a slowly progressive course. (Adams et al., Principles of Neurology, 6th ed, p1415) Becker Muscular Dystrophy,Duchenne Muscular Dystrophy,Muscular Dystrophy, Becker,Muscular Dystrophy, Pseudohypertrophic,Becker's Muscular Dystrophy,Cardiomyopathy, Dilated, 3B,Cardiomyopathy, Dilated, X-Linked,Childhood Muscular Dystrophy, Pseudohypertrophic,Childhood Pseudohypertrophic Muscular Dystrophy,Duchenne and Becker Muscular Dystrophy,Duchenne-Becker Muscular Dystrophy,Duchenne-Type Progressive Muscular Dystrophy,Muscular Dystrophy Pseudohypertrophic Progressive, Becker Type,Muscular Dystrophy, Becker Type,Muscular Dystrophy, Childhood, Pseudohypertrophic,Muscular Dystrophy, Duchenne Type,Muscular Dystrophy, Duchenne and Becker Types,Muscular Dystrophy, Pseudohypertrophic Progressive, Becker Type,Muscular Dystrophy, Pseudohypertrophic Progressive, Duchenne Type,Muscular Dystrophy, Pseudohypertrophic, Childhood,Progressive Muscular Dystrophy, Duchenne Type,Pseudohypertrophic Childhood Muscular Dystrophy,Pseudohypertrophic Muscular Dystrophy, Childhood,Duchenne Becker Muscular Dystrophy,Duchenne Type Progressive Muscular Dystrophy,Muscular Dystrophy, Becker's,Muscular Dystrophy, Duchenne-Becker,Pseudohypertrophic Muscular Dystrophy

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