Table 3.
Antibody profiles determined by immunoprecipitation
| PM n = 11 (%) |
DM n = 38 (%) |
Total n = 49 (%) |
|
|---|---|---|---|
| Myositis specific antibodies | 4 (36.4) | 10 (26.3) | 14 (28.6) |
| Anti-ARS antibodies | 3 (27.3) | 3 (7.9) | 6 (12.2) |
| Anti-Mi2 antibody | 0 | 7 (18.4) | 7 (14.3) |
| Anti-SRP antibody | 1 (9.1) | 0 | 1 (2.0) |
| Anti-p140 antibody | 0 | 9 (23.7) | 9 (18.4) |
| Anti-p155/140 antibody | 0 | 8 (21.1) | 8 (16.3) |
| Myositis associated antibodies | 1 (9.1) | 9 (23.7) | 10 (20.4) |
| Anti-U1 RNP | 0 | 6 (15.8) | 6 (12.2) |
| Anti-Ro | 1 (9.0) | 3 (7.9) | 4 (8.2) |
| Anti-La | 0 | 1 (2.6) | 1 (2.0) |
ARS = aminoacyl tRNA synthetase, DM = dermatomyositis, PM = polymyositis, SRP = signal recognition particle, RNP = ribonucleoprotein