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Erschienen in: Rheumatology International 7/2018

23.05.2018 | Review

The impact of anti-U1-RNP positivity: systemic lupus erythematosus versus mixed connective tissue disease

verfasst von: Alina Dima, Ciprian Jurcut, Cristian Baicus

Erschienen in: Rheumatology International | Ausgabe 7/2018

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Abstract

Anti-U1-RNP positivity remains mandatory for the mixed connective tissue disease (MCTD) diagnosis, reason for which anti-U1-RNP occurrence in patients with lupus clinical features might determine diagnostic issues. Thus, the prevalence of 25–30% for anti-RNP was reported in John Hopkins and LUMINA lupus cohorts and also 13% prevalence for the anti-U1-RNP in Euro-Lupus cohort. Presence of anti-U1-RNP antibodies in patients fulfilling SLE criteria (but not the MCTD ones) was associated with manifestations such as Raynaud phenomenon, musculoskeletal and lung impairment or nail fold capillaroscopy changes, some clinical features frequently encountered in MCTD patients and only rarely described in lupus population. The use of more specific markers such as 70 kDa anti-U1-RNP or anti-Sm-D was proposed for discriminating between SLE and MCTD. In addition, the IgM serotype of anti-U1-RNP seems more frequently expressed in SLE, while the IgG serotype alone in MCTD. Better acknowledgement of possible clinical involvements in lupus subsets, such as the peculiarities related to the anti-U1-RNP positivity, could provide access to early diagnosis of rather rare but possible severe lupus organ impairments (e.g. pulmonary arterial hypertension).
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Metadaten
Titel
The impact of anti-U1-RNP positivity: systemic lupus erythematosus versus mixed connective tissue disease
verfasst von
Alina Dima
Ciprian Jurcut
Cristian Baicus
Publikationsdatum
23.05.2018
Verlag
Springer Berlin Heidelberg
Erschienen in
Rheumatology International / Ausgabe 7/2018
Print ISSN: 0172-8172
Elektronische ISSN: 1437-160X
DOI
https://doi.org/10.1007/s00296-018-4059-4

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