Preferred Label : Multiple system atrophy 1, susceptibility to;
Symbol : MSA1;
CISMeF acronym : MSA1;
Type : Phenotype, molecular basis known;
Alternative titles and symbols : Msa1, susceptibility to;
Included titles and symbols : Autonomic failure, pure; Hypotension, orthostatic;
Description : Multiple system atrophy (MSA) is a distinct clinicopathologic entity that manifests
as a progressive adult-onset neurodegenerative disorder causing parkinsonism, cerebellar
ataxia, and autonomic, urogenital, and pyramidal dysfunction in various combinations.
Two main subtypes are recognized: 'subtype C,' characterized predominantly by cerebellar
ataxia, and 'subtype P,' characterized predominantly by parkinsonism. MSA is characterized
pathologically by the degeneration of striatonigral and olivopontocerebellar structures
and glial cytoplasmic inclusions that consist of abnormally phosphorylated alpha-synuclein
(SNCA; 163890) or tau (MAPT; 157140) (Gilman et al., 1998; Gilman et al., 2008; Scholz
et al., 2009). 'Subtype C' of MSA has been reported to be more prevalent than 'subtype
P' in the Japanese population (65-67% vs 33-35%), whereas 'subtype P' has been reported
to be more prevalent than 'subtype C' in Europe (63% vs 34%) and North America (60%
vs 13%, with 27% of cases unclassified) (summary by the The Multiple-System Atrophy
Research Collaboration, 2013). MSA is similar clinically and pathologically to Parkinson
disease (PD; 168600) and Lewy body dementia (127750). See also PARK1 (168601), which
is specifically caused by mutation in the SNCA gene. Pure autonomic failure manifests
as orthostatic hypotension and other autonomic abnormalities without other neurologic
involvement. Although there is some phenotypic overlap, the relationship of pure autonomic
failure to MSA is unclear (Vanderhaeghen et al., 1970; Schatz, 1996).;
Inheritance : Autosomal dominant; Autosomal recessive;
Molecular basis : Susceptibility conferred by mutation in the Coenzyme Q2, polyprenyltransferase gene
(COQ2, 609825.0006);
Prefixed ID : #146500;
Origin ID : 146500;
UMLS CUI : C3714927;
Automatic exact mappings (from CISMeF team)
False automatic mappings
Genes related to phenotype
HPO term(s)
ORDO concept(s)
Semantic type(s)
Validated automatic mappings to NTBT