Abstract
An ongoing, T-cell dependent, secondary antibody response to an epitope can be suppressed in vivo by low molecular weight, soluble polymers, bearing multiple copies of the same epitope. This study illustrates that such suppressive T-cell independent antigen arrays target the epitope-specific, high affinity, memory B cells for long-term functional elimination. Splenocytes from hyperimmune unsuppressed donors, when adoptively transferred into irradiated recipients will readily reconstitute a secondary anti-hapten response after antigenic challenge. No such response was observed with splenocytes transferred from hyperimmune donors suppressed with antigen arrays. The extent of suppression depended on antigen array dose and duration of exposure in the donor animals. The suppressive antigen array carryover from the donors into the recipients was negligible and insufficient to account for the observed suppression. B cells from hyperimmune mice producing high affinity anti-fluorescein antibodies, generated by multiple fluoresceinated ovalbumin (FL-OVA) injections, were helped efficiently by T cells from hyperimmune donors, which were either unsuppressed or suppressed with antigen arrays. Accordingly, help from T cells, specific for the...Continue Reading
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