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VEGFR2 inhibition by RNA interference affects cell proliferation, migration, invasion, and response to radiation in

Y Liu1, Y Qiao2, C Hu2

  • 1Xuzhou Medical College Graduate Academy, Xuzhou, 221006, China.

Clinical & Translational Oncology : Official Publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico
|October 14, 2015
PubMed
Abstract

Insights

Vascular endothelial growth factor receptor 2 (VEGFR2) knockdown inhibited non-small cell lung cancer (NSCLC) cell proliferation, migration, and invasion. Silencing VEGFR2 also enhanced radiation-induced apoptosis in Calu-1 cells.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Biology

Background:

  • Non-small cell lung cancer (NSCLC) is a leading cause of cancer-related mortality.
  • Vascular endothelial growth factor receptor 2 (VEGFR2) signaling is implicated in tumor growth and progression.
  • Understanding VEGFR2's role in NSCLC is crucial for developing targeted therapies.

Purpose of the Study:

  • To investigate the function of VEGFR2 in NSCLC cell line Calu-1.
  • To determine VEGFR2's impact on proliferation, migration, invasion, and radiation-induced apoptosis.
  • To elucidate the downstream signaling pathways affected by VEGFR2 modulation.

Main Methods:

  • VEGFR2 gene silencing using RNA interference in Calu-1 cells.
  • Quantitative real-time PCR (qRT-PCR) and Western blot analysis to confirm VEGFR2 knockdown.
  • Cell Counting Kit-8 (CCK8) and Transwell assays for proliferation, migration, and invasion.
  • Western blot to assess downstream signaling proteins (Akt, ERK1/2, p38 MAPK, HIF-1α).
  • Apoptosis analysis following radiation treatment.

Main Results:

  • VEGFR2 knockdown significantly reduced VEGFR2 mRNA and protein expression.
  • Silencing VEGFR2 inhibited cell proliferation, migration, and invasion.
  • VEGFR2 knockdown suppressed phosphorylation of Akt, ERK1/2, and p38 MAPK, and reduced HIF-1α protein synthesis.
  • Knockdown of VEGFR2 exacerbated radiation-induced apoptosis.

Conclusions:

  • VEGFR2 plays a significant role in promoting NSCLC cell proliferation, migration, and invasion.
  • VEGFR2 signaling is involved in pathways regulating cell survival and response to radiation.
  • Targeting VEGFR2 may represent a viable strategy to enhance the efficacy of radiotherapy in NSCLC.
Keywords:
MigrationProliferationRNA interferenceRadiationVEGFR2

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