Table 1.
Frequency of anti-signal recognition particle antibody-positive subjects by ELISA using a cut-off of 4 U/ml
| Myositis SRP + by immunoprecipitation | Control groups immunoprecipitationnegative for anti-SRP autoantibody |
|||||
|---|---|---|---|---|---|---|
| SSc (n = 7) | SLE (n = 4) | IMNM (n = 38) | Myositis Jo-1 (n = 14) | Myositis others (n = 15) | ||
| ELISA positive | 23 | 0 | 0 | 0 | 0 | 0 |
| ELISA negative | 3 | 7 | 4 | 38 | 14 | 15 |
| Total | 26 | 7 | 4 | 38 | 14 | 15 |
Other: 9 anti-TIF-1γ, 4 anti-Mi-2, 1 anti-MJ, 1 PL-7 autoantibodies; SRP: signal recognition particle; IMNM: immune-mediated necrotizing myopathy.