Related Experiment Video

Updated: Jun 8, 2026

Visualization and Quantification of TGFβ/BMP/SMAD Signaling under Different Fluid Shear Stress Conditions using Proximity-Ligation-Assay
11:38

Visualization and Quantification of TGFβ/BMP/SMAD Signaling under Different Fluid Shear Stress Conditions using Proximity-Ligation-Assay

Published on: September 14, 2021

TGF-ß1 antisense impacts the SMAD signalling system in fibroblasts from keloid scars

Gregor M Bran1, Ulrich J Sommer, Ulrich R Goessler

  • 1Department of Otolaryngology, University Hospital of Mannheim, Theodor-Kutzer-Ufer 1-3, D-68167 Mannheim, Germany. gregor.bran@umm.de

Anticancer Research
|October 15, 2010
PubMed
Abstract

Insights

Transforming growth factor-beta 1 (TGF-β1) treatment of keloid fibroblasts affects the SMAD signaling pathway. Antisense therapy targeting TGF-β1 modulated SMAD2 and SMAD4 expression, potentially suppressing keloid fibroblast proliferation.

Area of Science:

  • Cell Biology
  • Dermatology
  • Molecular Biology

Background:

  • Keloid scars exhibit abnormal fibroblast proliferation.
  • The Transforming Growth Factor-beta 1 (TGF-β1) signaling pathway is implicated in keloid pathogenesis.
  • The SMAD signaling system is a key mediator of TGF-β1 responses.

Purpose of the Study:

  • To investigate the effect of TGF-β1 antisense treatment on keloid fibroblasts.
  • To analyze the impact on the SMAD signaling pathway in keloid fibroblasts.

Main Methods:

  • Cross-sectional study involving keloid and healthy skin tissue from 9 patients.
  • Keloid fibroblasts cultured in vitro.
  • Immunohistochemistry and RT-PCR used to analyze SMAD protein and gene expression.
  • Treatment with TGF-β1 antisense oligonucleotides.

Main Results:

  • Increased expression of SMAD2, SMAD3, and SMAD4, with decreased SMURF2, observed in keloid fibroblasts.
  • TGF-β1 antisense therapy significantly downregulated SMAD2 and SMAD4.
  • SMURF2 expression was upregulated, while SMAD3 and SMAD6 showed no significant change post-treatment.

Conclusions:

  • Keloid fibroblasts demonstrate heightened sensitivity to TGF-β1, leading to elevated SMAD signaling.
  • Abrogation of TGF-β1 signaling via antisense therapy may suppress fibro-proliferative processes in keloids.
  • Evidence suggests an abnormal intracellular signal transduction response to TGF-β1 in keloid-derived fibroblasts.

More Related Videos

Isolation, Culture, and Characterization of Primary Dermal Fibroblasts from Human Keloid Tissue04:41

Isolation, Culture, and Characterization of Primary Dermal Fibroblasts from Human Keloid Tissue

Published on: July 28, 2023

Related Concept Videos

TGF - β Signaling Pathway01:16

TGF - β Signaling Pathway

The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors are of three kinds RI, RII, and RIII. The RI...
Intracellular Signaling Affects Focal Adhesions01:17

Intracellular Signaling Affects Focal Adhesions

Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
Some...