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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Autoimmun
2017 ; 84
(ä): 55-64
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Autoantibodies in juvenile-onset myositis: Their diagnostic value and associated
clinical phenotype in a large UK cohort
#MMPMID28663002
Tansley SL
; Simou S
; Shaddick G
; Betteridge ZE
; Almeida B
; Gunawardena H
; Thomson W
; Beresford MW
; Midgley A
; Muntoni F
; Wedderburn LR
; McHugh NJ
J Autoimmun
2017[Nov]; 84
(ä): 55-64
PMID28663002
show ga
OBJECTIVES: Juvenile myositis is a rare and heterogeneous disease. Diagnosis is
often difficult but early treatment is important in reducing the risk of
associated morbidity and poor outcomes. Myositis specific autoantibodies have
been described in both juvenile and adult patients with myositis and can be
helpful in dividing patients into clinically homogenous groups. We aimed to
explore the utility of myositis specific autoantibodies as diagnostic and
prognostic biomarkers in patients with juvenile-onset disease. METHODS: Using
radio-labelled immunoprecipitation and previously validated ELISAs we examined
the presence of myositis specific autoantibodies in 380 patients with
juvenile-onset myositis in addition to, 318 patients with juvenile idiopathic
arthritis, 21 patients with juvenile-onset SLE, 27 patients with muscular
dystrophies, and 48 healthy children. RESULTS: An autoantibody was identified in
60% of juvenile-onset myositis patients. Myositis specific autoantibodies (49%
patients) were exclusively found in patients with myositis and with the exception
of one case were mutually exclusive and not found in conjunction with another
autoantibody. Autoantibody subtypes were associated with age at disease onset,
key clinical disease features and treatment received. CONCLUSIONS: In juvenile
patients the identification of a myositis specific autoantibody is highly
suggestive of myositis. Autoantibodies can be identified in the majority of
affected children and provide useful prognostic information. There is evidence of
a differential treatment approach and patients with anti-TIF1? autoantibodies are
significantly more likely to receive aggressive treatment with IV
cyclophosphamide and/or biologic drugs, clear trends are also visible in other
autoantibody subgroups.