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Fibulin-5 regulates keloid-derived fibroblast-like cells through integrin beta-1.

N Furie1,2, D Shteynberg1,2, R Elkhatib2,3

  • 1Department of Cardiovascular Medicine, Lady Davis Carmel Medical Center, 7 Michal Street, Haifa 34361, Israel.

International Journal of Cosmetic Science
|June 23, 2015
PubMed
Summary

Fibulin-5 significantly reduces keloid fibroblast adhesion and proliferation by interacting with integrin beta-1. This extracellular protein plays a key role in keloid scar tissue formation.

Keywords:
cell culturefibulin-5integrin beta-1keloidmicrobiologyskin physiology/structure

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Area of Science:

  • Dermatology
  • Cell Biology
  • Biochemistry

Background:

  • Keloid scars are aggressive pathological tissues resulting from skin injury, characterized by excessive fibroblast-like cell (FLC) proliferation and extracellular matrix accumulation.
  • Fibulin-5, an extracellular matrix glycoprotein, is implicated in cellular functions and its role in keloid formation requires investigation.

Purpose of the Study:

  • To investigate the effect of fibulin-5 on the adhesion and proliferation of FLCs derived from keloid scars.
  • To elucidate the role of integrin beta-1 in mediating fibulin-5's effects on keloid FLCs.

Main Methods:

  • FLCs were isolated from keloid scars and cultured on fibulin-5 or gelatin-coated plates.
  • Proliferation rates were assessed after 72-96 hours of incubation.
  • Adhesion rates were determined over 240 minutes, with or without anti-human integrin beta-1 (CD29) antibody.

Main Results:

  • Culturing keloid FLCs on fibulin-5 significantly reduced their proliferation and delayed their adhesion compared to gelatin.
  • The reduced adherence of keloid FLCs to fibulin-5 was significantly inhibited by anti-integrin beta-1 antibodies.
  • These findings align with previous observations of reduced proliferation in vascular smooth muscle cells overexpressing fibulin-5.

Conclusions:

  • Fibulin-5 plays a critical role in regulating the adhesion and proliferation of human keloid-derived cells.
  • The interaction between fibulin-5 and integrin beta-1 is a key mechanism underlying its effects on keloid FLCs.
  • Targeting fibulin-5 or its interaction with integrin beta-1 may offer therapeutic strategies for managing keloid scars.