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[Effect of Low-Dose Triptolide and Sorafenib Alone and Their Combination on AML Cell Line MV411 and the Pathway of

Xue Wang1, Liang-Ming Ma2, Tao Wang3

  • 1Shanxi Medical University, Taiyuan 030001,Shanxi Province,China.

Zhongguo Shi Yan Xue Ye Xue Za Zhi
|August 17, 2019
PubMed
Abstract

Insights

Low-dose triptolide and sorafenib synergistically inhibit FLT3-ITD+ acute myeloid leukemia (AML) cell proliferation and induce apoptosis. This combination therapy may target the FLT3 and STAT5 signaling pathways in AML treatment.

Area of Science:

  • Oncology
  • Molecular Biology
  • Pharmacology

Background:

  • Acute myeloid leukemia (AML) with FLT3-ITD mutations presents a therapeutic challenge.
  • The STAT5 signaling pathway is crucial for AML cell survival and proliferation.
  • Targeting FLT3 and STAT5 offers a potential strategy for AML treatment.

Purpose of the Study:

  • To evaluate the efficacy of low-dose triptolide and sorafenib, alone and in combination, against the FLT3-ITD+ AML cell line MV4-11.
  • To investigate the impact of this combination therapy on cell proliferation, apoptosis, and the STAT5 signaling pathway.

Main Methods:

  • MV4-11 cells were treated with low-dose triptolide (IC20) and sorafenib (IC50) for 48 hours.
  • Cell proliferation was assessed using CCK-8 assays.
  • Apoptosis was measured by flow cytometry.
  • FLT3 and STAT5 expression at mRNA and protein levels were determined by RT-PCR and Western blot.

Main Results:

  • Both triptolide and sorafenib, individually and in combination, inhibited MV4-11 cell proliferation and induced apoptosis.
  • The combination treatment demonstrated significantly higher inhibition and apoptotic rates compared to single-drug treatments.
  • Combined therapy led to a significant downregulation of FLT3 and STAT5 mRNA and protein expression.

Conclusions:

  • Low-dose triptolide combined with sorafenib exhibits synergistic effects in inhibiting proliferation and inducing apoptosis in FLT3-ITD+ AML cells.
  • The observed synergy is likely mediated through the concurrent inhibition of the FLT3 and STAT5 signaling pathways.
  • This combination therapy represents a promising approach for FLT3-ITD+ AML.

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