Table 1.

In vitro effect of imatinib mesylate on autonomous BFU-E growth in PV patients




Autonomous BFU-Es ± SD per dish*


Patient
Source
Control
Imatinib mesylate, 10 μM
Percent inhibition
P
A   PB   126 ± 24.6   48 ± 5.6   62   .008  
B   PB   2 ± 0.6   0 ± 0   100   .007  
C   BM   19 ± 8   0 ± 0   100   .015  
D   PB   8 ± 1.5   0 ± 0   100   .001  
E   PB   8 ± 3   0 ± 0   100   .009  
F   PB   31 ± 8   2 ± 1   94   .004  
G   PB   54 ± 6.1   5 ± 1   91   <.001  
H   PB   7 ± 2   0 ± 0.3   100   .005  
I   PB   4 ± 2.5   0 ± 0   100   .041  
J   PB   9 ± 0.6   0 ± 0   100   <.001  
K   PB   4 ± 1.1   0 ± 0.3   100   .038  
L   PB   21 ± 2   1 ± 0.5   95   <.001  
M
 
PB
 
103 ± 13
 
9 ± 3
 
91
 
<.001
 



Autonomous BFU-Es ± SD per dish*


Patient
Source
Control
Imatinib mesylate, 10 μM
Percent inhibition
P
A   PB   126 ± 24.6   48 ± 5.6   62   .008  
B   PB   2 ± 0.6   0 ± 0   100   .007  
C   BM   19 ± 8   0 ± 0   100   .015  
D   PB   8 ± 1.5   0 ± 0   100   .001  
E   PB   8 ± 3   0 ± 0   100   .009  
F   PB   31 ± 8   2 ± 1   94   .004  
G   PB   54 ± 6.1   5 ± 1   91   <.001  
H   PB   7 ± 2   0 ± 0.3   100   .005  
I   PB   4 ± 2.5   0 ± 0   100   .041  
J   PB   9 ± 0.6   0 ± 0   100   <.001  
K   PB   4 ± 1.1   0 ± 0.3   100   .038  
L   PB   21 ± 2   1 ± 0.5   95   <.001  
M
 
PB
 
103 ± 13
 
9 ± 3
 
91
 
<.001
 

BFU-E indicates erythroid burst-forming unit; PV, polycythemia vera; SD, standard deviation; PB, peripheral blood; BM, bone marrow.

*

Mean number of erythroid bursts per 105 mononuclear cells ± SD from triplicates.

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