Cell transfer studies with the DK/or inbred chicken lines.
The histoincompatibility in the DK-OR-1 (B13B13) and DK/OR-3 (B19B19) inbred White Leghorn chicken lines was assessed with the Simonsen's spleen assay, GVHR mortality counts and antibody production by transferred cells in embryonic in vivo hosts. The two lines appear to be sufficiently histocompatible for use in cell transfer experiments. The occurrence of antigen responsive cells (ARC) and precursor cells in bone marrow as assessed with the in vivo culture and baby chick immune enhancement assays. Bone marrow of unimmunized donors possessed very little anti-MRBC immune responsiveness. Bone marrow cells from MRBC-primed donors, however, showed low anti-MRBC activity in the in vivo culture which could be elevated with a second antigen stimulation. Chicks grafted as embryos with bone marrow from immunized donors responded to MRBC immunization in an enhanced manner as compared to the control untreated chicks which responded poorly if at all to the antigen. Immunization appears (a) to increase the pool of potential ARC in the bone marrow of the donor and (b) to augment the responsiveness of bone marrow cells transferred into embryonic hosts.
Cell transfer studies with the DK/or inbred chicken lines. The histoincompatibility in the DK-OR-1 (B13B13) and DK/OR-3 (B19B19) inbred White Leghorn chicken lines was assessed with the Simonsen's spleen assay, GVHR mortality counts and antibody production by transferred cells in embryonic in vivo hosts. The two lines appear to be sufficiently histocompatible for use in cell transfer experiments. The occurrence of antigen responsive cells (ARC) and precursor cells in bone marrow as assessed with the in vivo culture and baby chick immune enhancement assays. Bone marrow of unimmunized donors possessed very little anti-MRBC immune responsiveness. Bone marrow cells from MRBC-primed donors, however, showed low anti-MRBC activity in the in vivo culture which could be elevated with a second antigen stimulation. Chicks grafted as embryos with bone marrow from immunized donors responded to MRBC immunization in an enhanced manner as compared to the control untreated chicks which responded poorly if at all to the antigen. Immunization appears (a) to increase the pool of potential ARC in the bone marrow of the donor and (b) to augment the responsiveness of bone marrow cells transferred into embryonic hosts.