title: The allogeneic effect in inbred mice. 3. Unique antigenic structural requirements in the expression of the phenomenon on unprimed cell populations in vivo.
abstract: The allogeneic effect has been shown to replace the requirement for carrier-specific helper thymus-derived (T) lymphocytes in secondary antihapten antibody responses in guinea pigs or mice. Attempts to enhance primary antibody responses to either 2,4-dinitrophenyl (DNP)-keyhole limpet hemocyanin (KLH) or DNP-ovalbumin (OVA) by the allogeneic effect have failed, and frequently result in suppression. However, the present studies have demonstrated a clear allogeneic effect on primary anti-DNP responses to a DNP-conjugate of the copolymer of D-glutamic acid and D-lysine, DNP-D-GL. This compound, for which no carrier-specific helper T cells exist, normally induces a state of DNP-specific tolerance in the doses employed. However, normal (BALB/c x A/J)F(1) recipients developed primary anti-DNP antibody responses, and of the IgG class, when DNP-D-GL was administered shortly after the transfer of allogeneic parental A strain lymphoid cells. To test the possibility that the presence of KLH-specific T lymphocytes might inhibit the expression of the allogeneic effect on the primary response to DNP-KLH, studies were undertaken using T cell-depleted spleen cells. In this model, the allogeneic effect again enhanced the primary response to DNP-D-GL, but still failed to enhance the primary response to DNP-KLH. These studies indicate that the structure of the molecule employed and its specific interaction with the bone marrow-derived (B) cell membrane may be critical in the capacity of primed and unprimed B cells to be influenced by the allogeneic effect.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D000921:Antibody-Producing Cells; D000961:Antilymphocyte Serum; D002352:Carrier Proteins; D003601:Cytotoxicity Tests, Immunologic; D004140:Dinitrophenols; D005971:Glutamates; D006241:Haptens; D006433:Hemocyanins; D006462:Hemolytic Plaque Technique; D017710:Lymphocyte Transfusion; D008214:Lymphocytes / Q000276:immunology*; D008239:Lysine; D051379:Mice; D008815:Mice, Inbred Strains; D010047:Ovalbumin; D011233:Precipitin Tests; D013154:Spleen / Q000166:cytology; D013601:T-Lymphocytes / Q000276:immunology; D014316:Tritium
chemical_list: D000961:Antilymphocyte Serum; D002352:Carrier Proteins; D004140:Dinitrophenols; D005971:Glutamates; D006241:Haptens; D014316:Tritium; D010047:Ovalbumin; D006433:Hemocyanins; D008239:Lysine