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Updated: Feb 10, 2026

Characterize Disease-related Mutants of RAF Family Kinases by Using a Set of Practical and Feasible Methods
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Characterize Disease-related Mutants of RAF Family Kinases by Using a Set of Practical and Feasible Methods

Published on: July 17, 2019

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Pan-RAF and MEK vertical inhibition enhances therapeutic response in non-V600 BRAF mutant cells

Eszter Molnár1, Dominika Rittler1, Marcell Baranyi1

  • 12nd Department of Pathology, Semmelweis University, Budapest, 1091, Hungary.

BMC Cancer
|May 10, 2018
PubMed
Abstract

Insights

Targeted therapy for non-V600 BRAF mutant tumors is lacking. Combined RAF and MEK inhibition shows promise, reducing tumor growth and increasing apoptosis in preclinical models.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Targeted therapy options for non-V600 BRAF mutated tumors are currently unavailable.
  • RAF and MEK signaling pathways are crucial in various cancer types.

Purpose of the Study:

  • To investigate the efficacy of concurrent RAF and MEK inhibition.
  • To evaluate tumor growth, migration, signaling, and apoptosis in non-V600 BRAF mutant preclinical models.

Main Methods:

  • Utilized six non-V600 BRAF mutated human tumor cell lines and one V600E control.
  • Employed pan-RAF inhibitors (sorafenib/AZ628) and a MEK inhibitor (selumetinib) in combination for in vitro and in vivo studies.
  • Assessed drug effects using viability, microscopy, immunoblot, cell cycle, TUNEL assays, and an orthotopic mouse model.

Main Results:

  • Combination therapy demonstrated synergistic tumor growth inhibition and increased apoptosis induction compared to single agents.
  • Concurrent inhibition led to enhanced Erk1/2 pathway suppression.
  • Combination treatment reduced cell migration, unlike single MEK inhibition which sometimes increased it.

Conclusions:

  • Combined RAF and MEK inhibition presents a potential therapeutic strategy for non-V600 BRAF mutant tumors.
  • This approach may offer improved treatment responses where targeted therapies are currently lacking.
Keywords:
AZ628ApoptosisInhibitionMEKMigrationNon-V600 BRAF mutationProliferationRAFSelumetinibSorafenib

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