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Piperlongumine Induces Apoptosis and Synergizes with Doxorubicin by Inhibiting the JAK2-STAT3 Pathway in

Di Chen1,2,3, Yangmin Ma4, Peiqi Li5

  • 1Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an 710021, China. observercd@163.com.

Molecules (Basel, Switzerland)
|June 28, 2019
PubMed

Insights

Piperlongumine (PL) and doxorubicin (DOX) synergistically inhibit triple-negative breast cancer (TNBC) growth by inducing apoptosis. This combination therapy targets the JAK2-STAT3 pathway, offering a promising strategy for TNBC treatment.

Area of Science:

  • Oncology
  • Pharmacology
  • Molecular Biology

Background:

  • Triple-negative breast cancer (TNBC) lacks targeted therapies, with chemotherapy like doxorubicin (DOX) offering limited efficacy and significant side effects.
  • Piperlongumine (PL), a natural alkaloid, exhibits selective anticancer properties and presents a potential new strategy for TNBC.
  • The JAK2-STAT3 pathway is implicated in cancer progression and represents a potential therapeutic target.

Purpose of the Study:

  • To evaluate the efficacy of piperlongumine (PL) and doxorubicin (DOX) alone and in combination against TNBC.
  • To elucidate the underlying molecular mechanisms, specifically the role of the JAK2-STAT3 pathway.
  • To assess the therapeutic potential of PL-DOX combination in a preclinical TNBC model.

Main Methods:

  • Cell viability and colony formation assays were used to assess growth inhibition.
  • Flow cytometry was employed to analyze apoptosis induction.
  • Western blot analysis was performed to investigate protein expression and pathway activation.
  • A tumor xenograft model was utilized to evaluate in vivo efficacy.

Main Results:

  • Piperlongumine (PL) demonstrated significant inhibition of TNBC cell growth and induced apoptosis.
  • The combination of PL and DOX exhibited synergistic effects, enhancing growth suppression and apoptosis induction in TNBC cells.
  • PL, alone or in combination with DOX, suppressed the activation of the JAK2-STAT3 pathway.
  • The combination therapy showed significant efficacy in reducing tumor volume in the xenograft model.

Conclusions:

  • The combination of piperlongumine (PL) and doxorubicin (DOX) demonstrates synergistic anticancer activity against triple-negative breast cancer (TNBC).
  • Inhibition of the JAK2-STAT3 pathway is a key mechanism underlying the efficacy of this combination therapy.
  • PL combined with chemotherapy represents a promising therapeutic strategy for clinical application in TNBC treatment.
Keywords:
JAK2STAT3apoptosisdoxorubicinpiperlonguminetriple-negative breast cancer

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