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Read e-book online Advances in Immunology, Vol. 32 PDF

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Extra resources for Advances in Immunology, Vol. 32

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A second requirement is that the patient’s B cells should be normal. , NWSM, Staphylococcus aweus Cowan strain I organisms, EBV, and the helper factor secreted b y normal T cells after their exposure to such agents as PWM). In addition, the B cells from the patient should produce immunoglobulin on stimulation with T-cell-dependent activators when they are cocultured with normal T cells. Although the T cells of many patients with primary immunodeficiency diseases or with immunodeficiency following bone marrow transplantation showed diminished helper cell activity when cocultured with normal B cells, only a minority fulfilled the second requirement for the definition of the helper cell defect as the sole factor leading to the abnormality of immunoglobulin synthesis.

Knapp and Baumgartner (1978), Montazeri and coworkers (1980),and Gmelig-Meyling and Waldmann (1981)observed a 3- to 8-fold augmentation of PWM-stimulated immunoglobulin synthesis by normal peripheral blood mononuclear cells when the percentage of monocytes was reduced from normal levels to approximately 5%of the cultured mononuclear cells. The augmentation of the immunoglobulin synthesis on monocyte depletion was not limited to PWM but was observed with all polyclonal B cell activators examined including SLO, SPL, NWSM, and EBV.

The suppressive capacity of large numbers of monocytes on B lymphocyte activation has been demonstrated in studies where augmented polyclonal activator stimulated immunoglobulin synthesis by peripheral blood mononuclear cells was observed following monocyte depletion. In these studies the readdition of large numbers of monocytes led to suppression of B-cell proliferation and immunoglobulin synthesis. Knapp and Baumgartner (1978), Montazeri and coworkers (1980),and Gmelig-Meyling and Waldmann (1981)observed a 3- to 8-fold augmentation of PWM-stimulated immunoglobulin synthesis by normal peripheral blood mononuclear cells when the percentage of monocytes was reduced from normal levels to approximately 5%of the cultured mononuclear cells.

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