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Related Experiment Video

Updated: May 11, 2026

Cultivating a Three-dimensional Reconstructed Human Epidermis at a Large Scale
08:49

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Published on: May 28, 2021

Elastin sequences trigger transient proinflammatory responses by human dermal fibroblasts.

Jessica F Almine1, Steven G Wise, Matti Hiob

  • 1School of Molecular Bioscience, University of Sydney, NSW 2006, Australia.

FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology
|May 15, 2013
PubMed
Summary
This summary is machine-generated.

Solubilized elastin from skin injury triggers fibroblast inflammation via the elastin binding protein (EBP) and PKA signaling. This pathway, involving MMP-12, offers a druggable target to reduce inflammatory responses in wound healing.

Keywords:
signalingwound healing

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Area of Science:

  • Dermatology and Wound Healing
  • Molecular Biology and Biochemistry
  • Cellular Signaling Pathways

Background:

  • Skin injury initiates complex wound resolution processes, with inflammation being a key early event.
  • The interplay between cellular components and matrix molecules in sustaining inflammation is not fully understood.
  • Elastin, abundant in the deep dermis, is a potential source of inflammatory triggers following tissue damage.

Purpose of the Study:

  • To investigate the role of solubilized elastin in triggering fibroblast-mediated inflammation after deep tissue injury.
  • To elucidate the molecular mechanisms and signaling pathways involved in elastin-induced fibroblast activation.
  • To identify potential therapeutic targets for mitigating pro-inflammatory responses in wound healing.

Main Methods:

  • Utilized tropoelastin as a surrogate for solubilized elastin sequences to stimulate dermal fibroblasts.
  • Measured the expression of metalloelastase MMP-12 and chemokines (CXCL8, CXCL1, CXCL5) using quantitative assays.
  • Employed specific inhibitors and protein truncation to identify key mediators (EBP, PKA, integrin αVβ3) in the signaling cascade.
  • Validated findings using in silico computational modeling and PKA inhibition (H-89).

Main Results:

  • Tropoelastin significantly upregulated fibroblast expression of MMP-12 (1056-fold) and chemokines (CXCL8, CXCL1, CXCL5).
  • Fibroblast Elastin Binding Protein (EBP) was identified as the mediator of tropoelastin signal transduction.
  • In silico modeling predicted and experimental inhibition confirmed Protein Kinase A (PKA) as a crucial signaling node.
  • Integrin αVβ3 was implicated via a separate trigger involving tropoelastin's C-terminal RKRK sequence.

Conclusions:

  • Solubilized elastin from dermal damage rapidly induces chemokine expression in fibroblasts.
  • The EBP-PKA signaling axis is a novel pathway mediating elastin-induced inflammation.
  • Targeting PKA or EBP presents a druggable strategy to attenuate pro-inflammatory states in wound healing.