Related Experiment Video

Updated: Jun 25, 2026

Analysis of Combinatorial miRNA Treatments to Regulate Cell Cycle and Angiogenesis
11:44

Analysis of Combinatorial miRNA Treatments to Regulate Cell Cycle and Angiogenesis

Published on: March 30, 2019

Transient RNA silencing of tissue factor pathway inhibitor-2 modulates lung cancer cell invasion

Sophie Iochmann1, Claire Bléchet, Valérie Chabot

  • 1Inserm U618, Protéases et Vectorisation Pulmonaires, Faculté de Médecine, Université François Rabelais, IFR 135, 10 Boulevard Tonnellé, 37032, Tours Cedex, France. iochmann@med.univ-tours.fr

Clinical & Experimental Metastasis
|March 10, 2009
PubMed

Insights

Tissue Factor Pathway Inhibitor-2 (TFPI-2) downregulation increases lung cancer cell invasion by upregulating Matrix Metalloproteinase-1 (MMP-1). This study highlights TFPI-2's role in regulating tumor aggressiveness.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Extracellular Matrix Biology

Background:

  • Tissue Factor Pathway Inhibitor-2 (TFPI-2) regulates extracellular matrix (ECM) degradation by inhibiting plasmin, which activates matrix metalloproteinases (MMPs).
  • TFPI-2 is often downregulated in aggressive cancers, suggesting a role in tumor invasion and metastasis.
  • Understanding TFPI-2's function is crucial for developing targeted cancer therapies.

Purpose of the Study:

  • To investigate the role of TFPI-2 in non-small cell lung cancer (NSCLC) cell invasion.
  • To determine the impact of TFPI-2 silencing on the expression and activity of various MMPs.
  • To elucidate the kinetic effects of TFPI-2 gene silencing and restoration in NSCLC cells.

Main Methods:

  • TFPI-2 was silenced in the NCI-H460 NSCLC cell line using small interfering RNA (siRNA).
  • Cell invasion and migration were assessed following TFPI-2 silencing.
  • mRNA and protein levels, as well as gelatinase activity of MMPs (MMP-1, -2, -3, -9, -14), were analyzed.
  • Kinetic studies allowed observation of both gene silencing and restoration effects.

Main Results:

  • TFPI-2 silencing significantly increased the invasive potential of NCI-H460 cells, while cell migration remained unaffected.
  • TFPI-2 silencing did not alter the mRNA or protein levels of MMP-2, -3, -9, and -14.
  • MMP-1 mRNA and protein levels were significantly increased following TFPI-2 silencing, with no change in MMP-2 and MMP-9 gelatinase activity.

Conclusions:

  • TFPI-2 downregulation contributes to the increased invasion of lung cancer cells.
  • The study identifies MMP-1 as a key mediator in TFPI-2-regulated lung cancer cell invasion.
  • These findings underscore the potential of targeting TFPI-2 for managing aggressive lung cancers.

More Related Videos

The Establishment of a Lung Colonization Assay for Circulating Tumor Cell Visualization in Lung Tissues07:39

The Establishment of a Lung Colonization Assay for Circulating Tumor Cell Visualization in Lung Tissues

Published on: June 16, 2018

Related Concept Videos

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 hydroxylase and factor...
MicroRNAs01:22

MicroRNAs

MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...
MicroRNAs01:22

MicroRNAs

MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
Experimental RNAi02:15

Experimental RNAi

RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
lncRNA - Long Non-coding RNAs02:39

lncRNA - Long Non-coding RNAs

In humans, more than 80% of the genome gets transcribed. However, only around 2% of the genome codes for proteins. The remaining part produces non-coding RNAs which includes ribosomal RNAs, transfer RNAs, telomerase RNAs, and regulatory RNAs, among other types. A large number of regulatory non-coding RNAs have been classified into two groups depending upon their length – small non-coding RNAs, such as microRNA, which are less than 200 nucleotides in length, and long non-coding RNA (lncRNA)...