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2003 FEB 5 - (NewsRx.com & NewsRx.net) -- "In the present study, we examined the effect of anti-IL-6 receptor antibody (MR16-1) on humoral and cellular immune responses in mice. MR16-1 did not affect antigen-specific antibody production in either the primary or secondary response in mice immunized with dinitro-phenyl (DNP)-keyhole limpet haemocyanin (KLH) in saline," researchers in Japan report.
"DNP-KLH immunization with complete Freund's adjuvant (CFA) markedly augmented anti-DNP antibody production and induced interleukin 6 (IL-6) production in serum," reported Masahiko Mihara and colleagues at Chugai Pharmaceutical Co. Ltd. In Shizuoka and Osaka University. "In this case, MR16-1 significantly suppressed antibody production and further increased serum IL-6 levels. Regarding the cellular response, we studied the effect on the delayed-type hypersensitivity (DTH) response. DTH response was induced in mice by the immunization with Mycobacterium butyricum with incomplete Freund's adjuvant and following antigen challenge into the footpad 14 days after immunization. When MR16-1 was injected immediately after immunization, the DTH response was significantly suppressed and enlargement of the spleen was also suppressed. This suppressive effect was observed, when MR16-1 was administered on day 0, but not on days 5 and 10. Again, serum IL-6 levels were much higher in MR16-1-treated mice compared with controls.
"Furthermore, spleen cells from control mice ...
Source: HighBeam Research, Interleukin-6 involvement does not always include an antibody...