Last reviewed 01/2018

  • antibody to Jo-1
    • the Jo-1 antigen is one of a series of transfer ribonucleic acid (tRNA) sythetases that can act as autoantigens - in this case histidyl tRNA sythetase
    • antibodies to Jo-1 correlate with disease activity in the polymyositis and dermatomyositis spectrum, especially with the presence of pulmonary interstitial disease
    • antibodies to Jo-1 are found less often in SLE and mixed connective tissue disorders
    • Jo-1 functions in the cytoplasm but was originally classified as an extractable nuclear antigen (ENA) - still remains part of the ENA group


  • (1) Sherley-Dale A. Serum autoantibodies and connective tissue disorders. Dermatology in Practice (April 2008); 16(1).