Enzymatic modification of lymphocyte receptors for antigen III. loss of antigen-responsiveness with recovery after adoptive transfer.
Spleen cells from bovine serum albumin (BSA)-primed CBA mice were exposed to proteolysis by papain and pronase under conditions where cell recovery and viability were not impaired but surface Ig and antigen-binding were greatly reduced. The ability of the cells to respond to BSA was tested by a modified Farr assay of serum taken 10 days after adoptive transfer of cells to lethally irradiated syngeneic recipients. Cells not exposed to enzymes were able to respond to BSA either in vitro before adoptive transfer or in vivo after transfer. Cells exposed to papain and pronase were unable to respond in vitro, but normal antibody production was approached when the cells were exposed to antigen in vivo. Thus, after removal of much surface Ig the cells were temporarily unresponsive to antigen but were still functional, as demonstrated by their ability to recover responsiveness in vivo.
D000818:Animals; D000917:Antibody Formation / Q000187:drug effects; D001666:Binding Sites, Antibody; D003864:Depression, Chemical; D007111:Immunity, Cellular / Q000187:drug effects*; D007112:Immunity, Maternally-Acquired / Q000187:drug effects*; D008213:Lymphocyte Activation / Q000187:drug effects*; D017710:Lymphocyte Transfusion; D008214:Lymphocytes / Q000187:drug effects* / Q000276:immunology; D051379:Mice; D008808:Mice, Inbred CBA; D010206:Papain / Q000494:pharmacology*; D011402:Pronase / Q000494:pharmacology*; D011947:Receptors, Antigen, B-Cell / Q000378:metabolism; D012710:Serum Albumin, Bovine / Q000378:metabolism / Q000494:pharmacology; D013154:Spleen / Q000166:cytology; D014185:Transplantation, Isogeneic
D011947:Receptors, Antigen, B-Cell; D012710:Serum Albumin, Bovine; D010206:Papain; D011402:Pronase