Table 2

Pharmacodynamic effects of continuously intravenously infused blinatumomab on T- and B-cell kinetics in the first treatment cycle of MRD+ ALL patients

Mean ± SDRange
T cells   
 Time, d 
        Time to T-cell nadir 0.36 ± 0.24 0.06-1.09 
        Time to 50% T-cell recovery 3.13 ± 1.85 0.82-9.10 
        Time to maximal T-cell increase 17.57 ± 9.00 2.06-28.06 
 T cells/μL 
        T-cell count at baseline 532 ± 283 112-1364 
        T-cell count at nadir 36 ± 49 2-197 
        Maximal T-cell count during treatment 1013 ± 430 376-1954 
        T-cell count at end of treatment 737 ± 317 152-1410 
        T-cell count after 1-wk recovery period 825 ± 432 287-1599 
 T cells, % 
        Maximal T-cell increase relative to baseline 220 ± 123 93-547 
B cells   
 Time, d 
        Time to B-cell depletion 2.18 ± 3.80 0.03-13.94 
 B cells/μL 
        B-cell count at baseline 75 ± 119 2-454 
        B-cell count at end of treatment 1 ± 1 0-4 
        B-cell count after 1-wk recovery period 1 ± 3 0-13 
Mean ± SDRange
T cells   
 Time, d 
        Time to T-cell nadir 0.36 ± 0.24 0.06-1.09 
        Time to 50% T-cell recovery 3.13 ± 1.85 0.82-9.10 
        Time to maximal T-cell increase 17.57 ± 9.00 2.06-28.06 
 T cells/μL 
        T-cell count at baseline 532 ± 283 112-1364 
        T-cell count at nadir 36 ± 49 2-197 
        Maximal T-cell count during treatment 1013 ± 430 376-1954 
        T-cell count at end of treatment 737 ± 317 152-1410 
        T-cell count after 1-wk recovery period 825 ± 432 287-1599 
 T cells, % 
        Maximal T-cell increase relative to baseline 220 ± 123 93-547 
B cells   
 Time, d 
        Time to B-cell depletion 2.18 ± 3.80 0.03-13.94 
 B cells/μL 
        B-cell count at baseline 75 ± 119 2-454 
        B-cell count at end of treatment 1 ± 1 0-4 
        B-cell count after 1-wk recovery period 1 ± 3 0-13 

Mean values ± SD and ranges for 20 evaluable patients are shown.

MRD indicates minimal residual disease; and ALL, acute lymphoblastic leukemia.

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