RESUMO
OBJECTIVE: To explore the detection of autoantibodies in serum of patients with coal workers' pneumoconiosis( CWP).METHODS: Eight hundred and three cases of stage Ⅰ CWP patients were selected as study subjects by random sampling method.Anti-nuclear antibody and anti-neutrophil cytoplasmic antibody( ANCA) in serum were detected by indirect immunofluorescence assay; myeloperoxidased efficiency( MPO) antibody,anti-mitochondrial M2 antibody( AMA-M2) and anti-cyclic citrullinated peptide( CCP) antibody were detected by enzyme-linked immunosorbent assay;rheumatoid factor( RF) was detected by enhanced immunoturbidimetry of latexa.Group analysis was conducted according to age,lung function,length of dust exposure and the nature of dust exposure collection.RESULTS: In the serum of 803 CWP patients,the positive rate of anti-nuclear antibody,AMA-M2,RF,anti-CCP antibody,ANCA and MPO antibody were 9.7%,7.5%,7.3%,4.0%,2.6% and 0.8% respectively; the karyotype distribution of 78 cases of anti-nuclear antibody positive specimens was spotted( 43.6%), cytoplasmic( 20.5%), homogenous( 7.7%) and nucleolus( 5.1%),with a titer of 1:100.The positive rate of anti-nuclear antibody in the > 70.0 years group was higher than that of ≤60.0 and ≤70.0 years group( P < 0.017); the positive rate of anti-nuclear antibody in the abnormal lung function group was lower than that of the normal group( P < 0.01); the positive rate of anti-CCP antibody in the dust exposure length > 30.0 years group was higher than that of ≤30.0 years group( P < 0.017); the positive rate of anti-CCP antibody in silica-exposed group was lower than that in the coal-exposed group( P < 0.01).CONCLUSION: The positive rate of antinuclear antibody,AMA-M2,RF and anti-CCP antibody in CWP patients were high.The positive rate of anti-nuclear antibody is associated with age and lung function.The positive rate of anti-CCP antibody is related to the duration and nature of dust exposure.