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Table 1 Opposite effects of As 2 O 3 or Calcium ionophore A23187 on a panel of leukemic T-cell lines

From: Sensitivity of leukemic T-cell lines to arsenic trioxide cytotoxicity is dependent on the induction of phosphatase B220/CD45R expression at the cell surface

 

As2O3(2 μM*)

Calcium ionophore A23187 (100 nM)

T-cell lines

B220 upregulation**

CD69 upregulation**

HSP70 upregulation**

Cell death***

B220 upregulation**

CD69 upregulation**

HSP70 upregulation**

Cell death***

EL-4

63

No

35

70

7

Yes

no

1

BW5147

30

No

20

39

19

Yes

no

25

Jurkat clone E6-1

22

No

10

12

30

Yes

no

28

HPB-ALL

10

No

3

5

80

Yes

no

75

L1210

Constitutive expression

No

5

10

Constitutive expression

Yes

no

55

  1. *a clinically relevant concentration of As2O3.
  2. **percentage of positive cells determined by flow cytometry.
  3. ***percentage of PI+ cells (either Annexin V- or Annexin V+) determined by flow cytometry.