Related Experiment Video

Updated: Jan 22, 2026

Robotic Taj Mahal Hepatectomy for Hilar Cholangiocarcinoma
09:19

Robotic Taj Mahal Hepatectomy for Hilar Cholangiocarcinoma

Published on: July 14, 2022

4.2K

The interaction of LOXL2 with GATA6 induces VEGFA expression and angiogenesis in cholangiocarcinoma

Tao Peng1, Xiang Deng1, Feng Tian1

  • 1Hepatobiliary Surgery Institute, Southwest Hospital, Army Medical University, Chongqing 400038, P.R. China.

International Journal of Oncology
|July 20, 2019
PubMed

Insights

The GATA6/LOXL2 complex promotes cholangiocarcinoma (CCA) growth by increasing vascular endothelial growth factor A (VEGFA) and angiogenesis. Targeting this complex may offer new therapeutic strategies for CCA patients.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Cholangiocarcinoma (CCA) is a prevalent hepatobiliary cancer with limited treatment options.
  • Current antiangiogenic therapies for CCA show unsatisfactory outcomes, necessitating a deeper understanding of angiogenesis mechanisms.
  • Identifying novel molecular targets is crucial for improving CCA treatment efficacy.

Purpose of the Study:

  • To investigate the roles of GATA-binding protein 6 (GATA6), lysyl oxidase-like 2 (LOXL2), and vascular endothelial growth factor A (VEGFA) in CCA angiogenesis.
  • To evaluate the prognostic significance of GATA6 and LOXL2 expression in CCA patients.
  • To elucidate the molecular interactions between GATA6, LOXL2, and VEGFA in CCA progression.

Main Methods:

  • Immunohistochemical staining of human CCA microarrays to assess GATA6, LOXL2, VEGFA expression, and microvessel density (MVD).
  • In vitro experiments including western blotting, RT-qPCR, and ELISAs to analyze VEGFA regulation by GATA6 and LOXL2.
  • Co-immunoprecipitation assays to confirm the physical interaction between GATA6 and LOXL2 and identify interacting domains.

Main Results:

  • GATA6/LOXL2 expression correlated with poor overall and disease-free survival in CCA patients.
  • GATA6/LOXL2 expression was positively associated with VEGFA levels and MVD.
  • GATA6 and LOXL2 physically interact, regulating VEGFA mRNA and protein secretion, promoting angiogenesis and tumor growth in vitro and in vivo.

Conclusions:

  • The GATA6/LOXL2 complex is a significant driver of angiogenesis and tumor growth in CCA.
  • This complex serves as a novel prognostic marker for stratifying CCA patients.
  • Targeting the GATA6/LOXL2 complex presents a promising therapeutic strategy for CCA treatment.

More Related Videos

Rat Mesentery Angiogenesis Assay18:30

Rat Mesentery Angiogenesis Assay

Published on: June 18, 2011

14.2K
Dual Bioluminescence Imaging of Tumor Progression and Angiogenesis10:56

Dual Bioluminescence Imaging of Tumor Progression and Angiogenesis

Published on: August 1, 2019

8.8K

Related Concept Videos

Mechanism of Angiogenesis01:10

Mechanism of Angiogenesis

Blood vessel formation starts early during embryonic development, around day 7. In the extraembryonic yolk sac, mesodermal precursor cells called hemangioblast proliferate and differentiate into angioblast. Angioblasts express vascular endothelial growth factor receptor 2 or VEGFR2, which binds VEGF-A, a proangiogenic factor, guiding blood vessel formation. VEGF signaling promotes angioblasts to form a blood island in the developing embryo. Angioblasts further differentiate, giving rise to...
6.7K
Regulation of Angiogenesis and Blood Supply01:24

Regulation of Angiogenesis and Blood Supply

Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits.  Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
3.4K
Van der Waals Interactions01:24

Van der Waals Interactions

Atoms and molecules interact with each other through intermolecular forces. These electrostatic forces arise from attractive or repulsive interactions between particles with permanent, partial, or temporary charges. The intermolecular forces between neutral atoms and molecules are ion–dipole, dipole–dipole, and dispersion forces, collectively known as van der Waals forces.
70.8K
What is Gene Expression?01:42

What is Gene Expression?

Overview
Gene expression is the process in which DNA directs the synthesis of functional products, that is, proteins. Cells can regulate gene expression at various stages. It allows organisms to generate different cell types and enables cells to adapt to internal and external factors.
Genetic Information Flows from DNA to RNA to Protein
A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is made up of nucleotides and proteins consist of amino...
194.9K
piRNA - Piwi-interacting RNAs02:57

piRNA - Piwi-interacting RNAs

PIWI-interacting RNAs, or piRNAs, are the most abundant short non-coding RNAs. More than 20,000 genes have been found in humans that code for piRNAs while only 2000 genes have been found for miRNAs. piRNAs can act at the transcriptional and post-transcriptional levels and have a vital role in silencing transposable elements present in germ cells. They are also involved in epigenetic silencing and activation. Previously, they were thought to function only in germ cells but new evidence suggests...
7.5K
Predator-Prey Interactions02:39

Predator-Prey Interactions

Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.
21.1K