LIU Ning,ZHAN Xinzhuo,YU Hui,et al.Effect of Qiling Baitouweng Tang on Proliferation and Apoptosis in Diffuse Large B-cell Lymphoma Through JAK2/STAT3 Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(13):10-19.
LIU Ning,ZHAN Xinzhuo,YU Hui,et al.Effect of Qiling Baitouweng Tang on Proliferation and Apoptosis in Diffuse Large B-cell Lymphoma Through JAK2/STAT3 Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(13):10-19. DOI: 10.13422/j.cnki.syfjx.20222430.
Effect of Qiling Baitouweng Tang on Proliferation and Apoptosis in Diffuse Large B-cell Lymphoma Through JAK2/STAT3 Signaling Pathway
To investigate the effect of Qiling Baitouweng Tang (QLBTWT) on proliferation and apoptosis, Janus kinase 2 (JAK2)/signal transducer and activator of transcription 3 (STAT3) signaling pathway and interleukin-10 (IL-10) in diffuse large B-cell lymphoma (DLBCL).
Method
2
With human DLBCL cells OCI-LY10 and U2932 as research objects, cell proliferation was detected by cell counting kit-8 (CCK-8) assay. After treatment with 0, 4.6, 9.3, 18.7, 37.5, 75, 150 mg·L
-1
QLBTWT for 24 h, the half-inhibitory concentration (IC
50
) of OCL-LY10 and U2932 cells was calculated to be 9.33, 16.13 mg·L
-1
, respectively, based on which, 9.5, 19, 38 mg·L
-1
QLBTWT were selected for subsequent experiments. After 0, 9.5, 19, 38 mg·L
-1
QLBTWT treatment for 24 h, the zymogen activities of Caspase-3, Caspase-8 and Caspase-9 in OCI-LY10 and U2932 cells were detected using corresponding activity assay kits (colorimetric), and the IL-10 expression was detected by enzyme-linked immuno sorbent assay (ELISA). The apoptosis rate and cell cycle of OCI-LY10 and U2932 cells treated with different concentrations of QLBTWT for 24 h were detected by flow cytometry. The expressions of apoptosis-related proteins [B-cell lymphoma 2 (Bcl-2), Bcl-2-associated X protein (Bax), cleaved poly adenosine diphosphate ribose polymerase (cleaved PARP), cleaved Caspase-3], JAK2, STAT3, phospho-JAK2 (p-JAK2), phospho-STAT3 (p-STAT3) pathway proteins, and c-Myc protein in OCL-LY10 and U2932 cells after 24 h treatment with 0, 9.5, 19, 38 mg·L
-1
QLBTWT were all tested by Western blot.
Result
2
After QLBTWT treatment on OCI-LY10 and U2932 cells for 24 h, cell proliferation was inhibited in each QLBTWT group compared with that in the control group (
P
<
0.05,
P
<
0.01). The zymogens of Caspase-3, Caspase-8 and Caspase-9 were activated (
P
<
0.01), and there was an increase in cell apoptosis (
P
<
0.05,
P
<
0.01) and cell cycle arrest at Gap phase1 (G
1
) phase in 9.5, 19 and 38 mg·L
-1
QLBTWT group (
P
<
0.05,
P
<
0.01). After 9.5, 19 and 38 mg·L
-1
QLBTWT treatment on OCI-LY10 and U2932 cells for 24 h, the expressions of Bcl-2, p-JAK2 and p-STAT3 proteins were decreased (
P
<
0.01), and the expressions of Bax, cleaved PARP and cleaved Caspase-3 proteins were increased (
P
<
0.01), but no significant change was observed in the expressions of JAK2 and STAT3 proteins. Compared with the conditions in the control group, the expressions of c-Myc, p-JAK2, and p-STAT3 proteins were down-regulated in 19 mg·L
-1
QLBTWT group and 19 mg·L
-1
QLBTWT+10 μg·L
-1
IL-10 group (
P
<
0.05,
P
<
0.01), and up-regulated in 10 μg·L
-1
IL-10 group (
P
<
0.05,
P
<
0.01), while there was no difference in JAK2/STAT3 proteins.
Conclusion
2
QLBTWT can inhibit proliferation and induce apoptosis of human DLBCL cells OCI-LY10 and U2932, and the potential mechanism may be related to the regulation of JAK2/STAT3 signaling pathway.
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