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- W2000426145 abstract "To investigate whether the antibody response and T-B-cell collaboration in vitro can be obtained in the absence of mitogens, a method of obtaining an in vitro primary anti-sheep red blood cell antibody response by rabbit spleen and lymph node cells was developed. We used Marbrook culture vessels and a specially prepared medium containing 10% autologous serum and maintained at pH 7.4–7.6. The system was shown to be devoid of any polyclonal mitogens as assessed by [3H]thymidine incorporation and by direct examination for blast cells in stained smears. The primary response increased continuously over the 5-day cultivation period and only IgM but not IgG plaque-forming cells (PFC) were detected. In over 20 experiments, the response ranged from 357 ± 17 to 4425 ± 110 PFC/107 cultured cells with a median stimulation index of 52. The spleen cells required less antigen than the lymph node cells and 2-mercaptoethanol inhibited the response of the spleen cells but not that of the lymph node cells. Lymphocytes were separated into highly pure T- and B-cell populations by negative selection using antibody-coated human erythrocytes to rosette either T or B cells and Ficoll-Hypaque centrifugation to remove rosetted cells. Upon cultivation, B cells alone gave a low IgM response, whereas B cells reconstituted with T cells gave a response similar to that obtained with unseparated lymphoid cells. We concluded that: (a) optimal conditions for obtaining primary in vitro antibody responses using rabbit spleen and lymph node cells were established, (b) T-B-cell collaboration was demonstrated in the rabbit primary antibody response to sheep erythrocytes, and (c) the primary antibody response in vitro and T-B-cell collaboration may occur in the absence of detectable polyclonal mitogens." @default.
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- W2000426145 date "1977-07-01" @default.
- W2000426145 modified "2023-09-27" @default.
- W2000426145 title "Primary in vitro antibody response of rabbit lymphoid cells and T-B cell collaboration in the absence of detectable mitogens" @default.
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- W2000426145 doi "https://doi.org/10.1016/0008-8749(77)90179-4" @default.
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