In accord with this, life threatening toxic effects were reported in humans treated with AZT at 20 to 60 ÂµM. Therefore, we have re-examined the growth inhibitory doses of AZT for the human CEM T-cell line and several other human and animal cells.It was found that at 10 ÂµM and 25 ÂµM AZT, all cells are inhibited at least 50% after 6 to 12 days, and between 20 to 100% after 38 to 48 days.o determine whether other human and animal cells are similar to human T-cells with regard to AZT-sensitivity, the viability of a human lung (WI) and foreskin (Hs) cell line, of a mouse cell line (C3H) and of secondary Chinese hamster cells (C.H.) was studied in AZT.