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Related Experiment Videos

Thrombin stimulates fibroblast chemotaxis and replication

K E Dawes1, A J Gray, G J Laurent

  • 1Department of Thoracic Medicine, University of London, United Kingdom.

European Journal of Cell Biology
|June 1, 1993
PubMed
Summary

Alpha-thrombin, a key protein in blood clotting, effectively attracts and stimulates the growth of skin fibroblasts. This study demonstrates its significant role in fibroblast migration and proliferation, impacting tissue repair processes.

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Hematology

Background:

  • Alpha-thrombin is a serine protease crucial for hemostasis and coagulation.
  • While known as a fibroblast mitogen, its role in fibroblast recruitment was previously unassessed.

Purpose of the Study:

  • To investigate the effects of human alpha-thrombin on fibroblast chemotaxis and proliferation.
  • To elucidate the mechanisms underlying these actions in human and rat skin fibroblasts.

Main Methods:

  • Fibroblast chemotaxis was analyzed using a 48-well Boyden chamber assay.
  • Fibroblast replication was quantified via a spectrophotometric method measuring methylene blue uptake.
  • Two cell lines were utilized: fetal rat skin (FR) and newborn human foreskin (HS68).

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Main Results:

  • Human alpha-thrombin significantly stimulated chemotaxis in both FR and HS68 fibroblasts across various concentrations.
  • Maximal migration for FR fibroblasts occurred at 10(-10) M, comparable to platelet-derived growth factor.
  • Optimal fibroblast replication for both cell types was observed at 1.25 x 10(-9) M thrombin.

Conclusions:

  • Human alpha-thrombin acts as a potent chemoattractant and mitogen for skin fibroblasts.
  • These findings highlight alpha-thrombin's potential role in wound healing and tissue remodeling processes.