A comparison has been made of the well known hapten-specific tolerance systems induced, respectively, by hapten-D-GL or hapten-isologous γ-globulin conjugates. The principal question addressed in this study concerned the comparative maintenance of B cell tolerance, induced by one or the other method, after adoptive transfer into carrier-primed, irradiated recipient animals and, in addition, what role, if any, might be played by T lymphocytes in the tolerant donor cell population in maintaining such tolerance. The results clearly show that insofar as the hapten-specific B cell is concerned, no obvious difference exists in the capacity to maintain tolerance adoptive transfer between the hapten-D-GL and hapten-isologous γ-globulin systems; such cells remained tolerant even in the presence of excess helper T cell activity. Moreover, under the conditions employed, depletion of T lymphocytes from the tolerant donor cell population did not affect the maintenance of hapten-specific B cell tolerance after adoptive transfer to irradiated recipients.

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