Anti-Cortactin Autoantibodies Are Associated With Key Clinical Features in Adult Myositis But Are Rarely Present in Juvenile Myositis.
Publication/Presentation Date
2-1-2022
Abstract
OBJECTIVE: To define the prevalence and clinical phenotype of anti-cortactin autoantibodies in adult and juvenile myositis.
METHODS: In this longitudinal cohort study, anti-cortactin autoantibody titers were assessed by enzyme-linked immunosorbent assay in 670 adult myositis patients and 343 juvenile myositis patients as well as in 202 adult healthy controls and 90 juvenile healthy controls. The prevalence of anti-cortactin autoantibodies was compared among groups. Clinical features of patients with and those without anti-cortactin autoantibodies were also compared.
RESULTS: Anti-cortactin autoantibodies were more common in adult dermatomyositis (DM) patients (15%; P = 0.005), particularly those with coexisting anti-Mi-2 autoantibodies (24%; P = 0.03) or anti-NXP-2 autoantibodies (23%; P = 0.04). In adult myositis, anti-cortactin was associated with DM skin involvement (62% of patients with anti-cortactin versus 38% of patients without anti-cortactin; P = 0.03), dysphagia (36% versus 17%; P = 0.02) and coexisting anti-Ro 52 autoantibodies (47% versus 26%; P = 0.001) or anti-NT5c1a autoantibodies (59% versus 33%; P = 0.001). Moreover, the titers of anti-cortactin antibodies were higher in patients with interstitial lung disease (0.15 versus 0.12 arbitrary units; P = 0.03). The prevalence of anti-cortactin autoantibodies was not different in juvenile myositis patients (2%) or in any juvenile myositis subgroup compared to juvenile healthy controls (4%). Nonetheless, juvenile myositis patients with these autoantibodies had a higher prevalence of "mechanic's hands" (25% versus 7%; P = 0.03), a higher number of hospitalizations (2.9 versus 1.3; P = 0.04), and lower peak creatine kinase values (368 versus 818 IU/liter; P = 0.02) than those without anti-cortactin.
CONCLUSION: The prevalence of anti-cortactin autoantibodies is increased in adult DM patients with coexisting anti-Mi-2 or anti-NXP-2 autoantibodies. In adults, anti-cortactin autoantibodies are associated with dysphagia and interstitial lung disease.
Volume
74
Issue
2
First Page
358
Last Page
364
ISSN
2326-5205
Published In/Presented At
Pinal-Fernandez, I., Pak, K., Gil-Vila, A., Baucells, A., Plotz, B., Casal-Dominguez, M., Derfoul, A., Martinez-Carretero, M. A., Selva-O'Callaghan, A., Sabbagh, S., Casciola-Rosen, L., Albayda, J., Paik, J., Tiniakou, E., Danoff, S. K., Lloyd, T. E., Miller, F. W., Rider, L. G., Christopher-Stine, L., Mammen, A. L., … Childhood Myositis Heterogeneity Collaborative Study Group (2022). Anti-Cortactin Autoantibodies Are Associated With Key Clinical Features in Adult Myositis But Are Rarely Present in Juvenile Myositis. Arthritis & rheumatology (Hoboken, N.J.), 74(2), 358–364. https://doi.org/10.1002/art.41931
Disciplines
Medicine and Health Sciences | Pediatrics
PubMedID
34313394
Department(s)
Department of Pediatrics
Document Type
Article