Table I.

Myositis-specific antibodies, acc. to [17]

Myositis-specific antibodies		Autoantibody frequency
Anti-synthetase antibodies		30–40%
Anti-Jo-1	anti-histidyl-tRNA synthetase	most common (about 20% of idiopathic inflammatory myopathies)
PL 12	anti-alanyl-tRNA synthetase
PL 7	anti-threonyl-tRNA synthetase
EJ	anti-glycyl-tRNA synthetase
OJ	anti-isoleucyl-tRNA synthetase
KS	anti-asparaginyl-tRNA synthetase
Zo	anti-phenylalanyl-tRNA synthetase
Ha	anti-tyrosyl-tRNA synthetase
Mi-2 (anti-nuclear ATPase/helicase)		< 10%
SRP signal recognition particle – anti-ribonucleoprotein (proteins 7SLRNA)		5%
Anti-TIF1-γ (anti-p155/140 autoantibodies)		13–21%
Anti-MDA-5 (cytoplasmic protein melanoma differentiation-associated gene 5		unknown
NXP-2 (nuclear matrix protein)		unknown
Anti-SAE (anti-small ubiquitin-like modifier activating enzyme)		5%