The exact mechanisms involved in the initiation and maintenance of immunologic enhancement remain unsolved. Leukocytes harvested from lymphoid tissue and from cardiac allografts in enhanced rats possess suppressor activity in vitro. The present in vivo studies extend previous observations that passive transfer of thymocytes from heart-engrafted rats to unmodified syngeneic recipients significantly prolongs test heart graft survival.
|Original language||English (US)|
|Number of pages||2|
|State||Published - 1979|
ASJC Scopus subject areas