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From a 2DE-Gel Spot to Protein Function: Lesson Learned From HS1 in Chronic Lymphocytic Leukemia
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From a 2DE-Gel Spot to Protein Function: Lesson Learned From HS1 in Chronic Lymphocytic Leukemia

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Bepridil exhibits anti-leukemic activity associated with NOTCH1 pathway inhibition in chronic lymphocytic leukemia

Stefano Baldoni1, Beatrice Del Papa2, Erica Dorillo2

  • 1Hematology Section, Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy.

International Journal of Cancer
|March 7, 2018
PubMed

Insights

The calcium channel modulator bepridil effectively targets NOTCH1 signaling in chronic lymphocytic leukemia (CLL) cells, inducing apoptosis and reducing leukemic cell infiltration in preclinical models.

Area of Science:

  • Hematology
  • Oncology
  • Molecular Biology

Background:

  • NOTCH1 signaling pathway dysregulation is implicated in chronic lymphocytic leukemia (CLL) pathogenesis.
  • Targeting NOTCH1 offers a potential therapeutic strategy for CLL.

Purpose of the Study:

  • To identify novel inhibitors of the NOTCH1 pathway for CLL treatment.
  • To evaluate the anti-leukemic activity of bepridil in CLL.

Main Methods:

  • Gene expression-based screening to identify NOTCH1 pathway inhibitors.
  • In vitro studies using primary CLL cells and co-culture systems with protective stroma.
  • In vivo evaluation in a CLL xenotransplant mouse model.

Main Results:

  • Bepridil was identified as a novel NOTCH1 pathway inhibitor.
  • Bepridil induced selective apoptosis in primary CLL cells, irrespective of NOTCH1 mutation status.
  • Bepridil reduced NOTCH1 activity by decreasing transmembrane and activated NOTCH1 protein levels.
  • In vivo studies demonstrated bepridil's efficacy in reducing leukemic cell infiltration and NOTCH1 activation.

Conclusions:

  • Bepridil exhibits in vitro and in vivo anti-leukemic activity in CLL by inhibiting the NOTCH1 pathway.
  • These findings support the clinical development of bepridil as a targeted therapy for CLL.
Keywords:
NOTCH1chronic lymphocytic leukemiatargeted therapy

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