[Clinical significance of anti-centromere antibody and anti-CENP-B antibody in sera of patients with primary biliary cirrhosis]. 
Anti-centromere antibody (ACA) have been recognized in sera of patients with primary biliary cirrhosis (PBC) and CREST syndrome.  The major reactive antigen of ACA have been identified as CENP-B (80kDa).  Using an indirect immunofluorescence (IIF) method and ELISA method, we detected ACA and anti-CENP-B antibody in patients with PBC and various liver diseases and collagen diseases.  We tested sera of 44 patients with PBC, 8 patients with autoimmune hepatitis (AIH), 51 patients with chronic hepatitis B (CH-B), 312 patients with chronic hepatitis C(CH-C), 12 patients with progressive systemic sclerosis (PSS), 10 patients with systemic lupus erythematosus (SLE), 10 patients with rheumatoid arthritis (RA), and 30 with healthy subjects (HS).  ACA was detected by IIF technique, using HEp-2 cell and fluoro-CENTRO slides (MBL) as substrates.  Anti-CENP-B antibody was detected by ELISA method using recombinant CENP-B (MBL) as the antigen.  ACA was detected in sera of 12 (27%) patients with PBC, two (25%) patients with AIH, five (2%) patients with CH-C, nine (75%) patients with PSS, and one (10%) patients with RA.  ACA was not detected in sera of patients with CH-B and SLE and in HS.  The results of IIF test for ACA, using HEp -2 cells and fluoro-CENTRO slides, were completely agreed.  Anti-CENP-B antibody was detected in 28(97%) out of 29 patients sera positive for ACA.  The titers of ACA and anti-CENP-B antibody did not show a correlation (r = 0.24).  Out of 12 sera, in which, the titers of anti-CENP-B antibody was over 400.  Among them, eight were patients with PBC and four were PSS.  Later, out of four patients with PSS, three (75%) were found to be positive for anti-mitochondrial antibody.  Out of five patients, in which the titer of anti-CENP-B antibody showed over 800, all were patients with PBC.  The titers of ACA have no relationship with PBC.  However, the titers of anti-CENP-B antibody have closed relationship with PBC.  The reason why the titers of ACA and anti-CENP-B antibody were not correlated is unknown.  We consider anti-CENP-B antibody is a new marker of a subset of PBC, because almost all the patients were PBC when this antibody showed over 400.