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- ArticleIzui S, Kobayakawa T, Zryd MJ, Louis J, Lambert PH.J Immunol. 1977 Dec;119(6):2157-62.The capacity of various polyclonal B lymphocyte activators (PBA) to induce, in mice, the formation of anti-DNA antibodies was compared with their ability to mediate the release of DNA in circulating blood and to stimulate polyclonal antibody synthesis in vivo. Anti-DNA antibodies or polyclonal antibody synthesis were induced in mice after the injection of at least 10 microgram lipopolysaccaride (LPS) from Salmonella typhimurium, 1 mg dextran sulfate (DS), or 2 mg purified protein derivative of tubercle bacteria RT32 (PPD). Smaller quantities of LPS (0.1 microgram) or DS (500 microgram) were sufficient to cause the release of DNA in circulating blood, whereas PPD was not able to provoke such a release at any concentration used. The association of anti-DNA antibodies with polyclonal antibody synthesis in mice injected with various PBA contrasts with the lack of correlation between the formation of anti-DNA antibodies and the release of measurable amounts of DNA in circulating blood. These results strongly suggest that the induction of anti-DNA antibodies by PBA is a consequence of the polyclonal B lymphocyte activation.