IMMUNE REACTIVITY IN MICE THYMECTOMIZED SOON AFTER BIRTH: NORMAL RESPONSE AFTER PREGNANCY.
Explore the source record for details and available documents.
Biomedical subjects
Publications and source records attributed to D OSOBA.
Explore the source record for details and available documents.
After receiving apparently compatible blood three patients suffered hemolytic reactions. The compatibility tests were by saline and indirect Coombs technique including a screening tube of group 0 cells. The antibodies responsible for these reactions were not clearly demonstrable for several days following the transfusion. In two instances the antibody was anti-E.These case reports point up the following. (a) Currently used cross-matching procedures will occasionally fail to demonstrate an incompatibility. (b) In two of the cases the direct Coombs test was negative on an immediate post-transfusion specimen, when it could have been of great aid in diagnosis. (c) When a transfusion reaction of hemolytic type is suspected, a follow-up study several days after the reaction may clarify the diagnosis; when possible, transfusions should be avoided in the interim.
Neonatally thymectomized mice were implanted intraperitoneally at 7 days of age with Millipore diffusion chambers containing either embryonic or neonatal thymus tissue. Mice which received either empty diffusion chambers or no further treatment following neonatal thymectomy served as controls. In contrast to these controls, most of the mice implanted with thymus-filled chambers gained weight satisfactorily, did not develop a wasting syndrome, and had the capacity to produce serum antibodies in response to sheep erythrocytes and to reject allogeneic skin grafts. Lymphoid follicles were present in the lymph nodes, spleen, and intestinal tract of the implanted mice but most still showed some diminution in the population of lymphocytes in both blood and tissues. Control thymectomized mice had markedly depleted lymphoid tissues and low peripheral blood lymphocyte levels. The tissue recovered after 1 to 2 months from the diffusion chambers showed only epithelial-reticular cells but no lymphoid cells. It is suggested that a humoral factor produced by the thymus epithelial-reticular complex may be responsible for endowing lymphoid cells with immunological competence.
Explore the source record for details and available documents.
Explore the source record for details and available documents.