Abstract
Newborn mice of strain A were injected intravenously at birth with 9–15 million spleen cells from adult CBA donors. The recipients exhibited splenomegaly and other signs of graft-versus-host reaction during the first 3 weeks of life. Adult survivors were uniformly tolerant of CBA skin. They showed no sign of a continuing graft-versus-host reaction. The spleens of the treated mice were tested for the presence of immunologically competent donor and host cells by Simonsen's discriminant spleen assay. From the age of 7 days onwards the spleens were found to contain a small percentage of donor cells which were immunologically active against antigens of a third strain. In spleens from adult survivors activity, attributable to the host component, against third-party antigens was undiminished as compared with that of untreated A-strain mice. But activity against the CBA donor strain was absent.
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Selected References
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