Abstract
Spleen cells from adult F1 hybrid mice undergoing the graft versus host reaction due to the inoculation of lymphoid cells of parental origin showed increased adenylate cyclase activity and cytolytic activity. A time-course study revealed that both the adenylate cyclase and cytolytic activities started increasing at Day 4 and reached maximum at Day 8 of initiation of the graft versus host reaction. Furthermore, the magnitude of both adenylate cyclase activation and cytolytic activity were dependent upon the number of parental cells injected into the F1 hybrid recipients. Elevated adenylate cyclase activity was also observed in spleen cells from irradiated animals undergoing the graft versus host reaction in which the nonspecific, but not the specific cytolytic activity was markedly depressed.
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