Detection of an IgM antiidiotype directed against anti‐HBs in hepatitis B patients

Catherine L. Troisi, F. Blaine Hollinger – 1 September 1985 – An IgM‐specific anti‐[anti‐HBs] antibody was detected by radioimmunoassay using anti‐IgM‐coated beads and 125I‐labeled anti‐HBs. This antiidiotype was found only in the sera of hepatitis B virus‐infected patients, both acute and chronic. However, not all HBsAg‐positive patients exhibited this reaction, and activity was correlated with the presence of HBeAg. Approximately 93% of sera that contained antiidiotype activity also contained HBeAg. Conversely, 70% of the sera positive for HBeAg reacted in the IgM assay.

Drug‐induced hepatitis associated with anticytoplasmic organelle autoantibodies

Jean‐Claude Homberg, Nielsen Abuaf, Samir Helmy‐Khalil, Michel Biour, Raoul Poupon, Shamsul Islam, François Darnis, Victor Georges Levy, Pierre Opolon, Michel Beaugrand, Jacques Toulet, Gaby Danan, Jean‐Pierre Benhamou – 1 September 1985 – A study from five hepatology units documenting 157 cases of drug‐induced hepatitis and a second study from a laboratory of immunology which tested more than 100,000 sera permitted us to establish the frequency of antiorganelle antibodies and their diagnostic value in drug‐induced hepatitis.

Regulation of the human immune response to HBsAg: Effects of antibodies and antigen conformation in the stimulation of helper T cells by HBsAg

Esteban Celis, Ikunoshin Kato, Richard W. Miller, Tse Wen Chang – 1 September 1985 – The role of accessory cells (antigen‐presenting cells) in binding HBsAg in the response of human T cells to this antigen was studied. Antibodies to HBsAg of IgG class increased significantly the amount of HBsAg that was captured and internalized by accessory cells in vitro. On the other hand, antibodies to HBsAg of IgM class or the F(ab‐)2 and Fab fragments of antibodies to HBsAg of IgG class did not modify the amount of HBsAg associated to these cells.

Mitochondrial antibodies in primary biliary cirrhosis: Species and nonspecies specific determinants of M2 antigen

Jutta Lindenborn‐Fotinos, Harold Baum, Peter A. Berg – 1 September 1985 – Sera from patients with primary biliary cirrhosis reacted with four major bands in beef heart mitochondria and ATPase extract when analyzed by immunoblot after sodium dodecyl sulfate‐polyacrylamide gel electrophoresis. These four immunologically reactive bands corresponded to protein bands with molecular weights of about (a) 80,000; (b) 63,000; (c) 56,000; and (d) 43,000 to 46,000. An additional immunoreactive band was found with some high‐titered primary biliary cirrhosis sera at 36,000.

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