Leukemia virus activation during homograft rejection

Activation of murine leukemia viruses, as detected by the mixed culture cytopathogenicity (XC) assay, followed the transplantation of A/J skin onto immunosuppressed BALB/c mice. Virus was found in most of the mice receiving both skin grafts and antilymphocyte serum, but not in animals receiving either the serum alone, skin graft alone, or no treatment.

Antiserum to lymphocytes: prolonged survival of canine renal allografts

A horse immunized with dog lynmphocytes produced an antiserum which agglutinated canine lymphocytes in vitro and caused prolonged lymphopenia in dogs in vivo. Renal transplants in dogs treated with this antiserum survived for long periods, two of the grafts surviving beyond 350 days with normal function and histologic appearance.

Adult Thymectomy: Effect on Recovery from Immunologic Depression in Mice

A/Jax mice treated for I week with rabbit antiserum to A/Jax lymphocytes showed peripheral lymphopenia and tissue lymphocyte depletion which persisted for 4 weeks after initiation of serum treatment. During this time, such animals showed depression of the humoral antibody response and inability to reject skin allografts. After 4 weeks, mice recovered from effects of serum treatment. Normal blood and tissue lymphocyte levels returned, and immunologic competence was restored. Thymectomy of A/Jax mice (8 to 10 weeks old) prior to serum treatment resulted in peripheral and tissue lymphopenia and depression of antibody formation, which persisted twice as long as that shown by animals given serum alone. Similarly, skin allografts survive two to four times longer in serum-treated thymectomized mice, and, in some cases persisted over 100 days in perfect condition.