a weakly tumorigenic dose of 5 mg ni3s2 ( tumor incidence , 2 % ) induced a transient decrease of pbmc nk activity against yac-1 cells in vitro ( from the 17th to the 23d wk after ni3s2 inoculation ) , which could be restored by in vivo injections of partially purified rat fibroblastic interferon ( ifn ) .
C0007634
cells
C0016030
fibroblastic