Mechanism of mast cell adhesion to human tenocytes in vitro

Hayedeh Behzad, Shu Huei Tsai, Paulina Nassab, Rouhollah Mousavizadeh, Robert G. McCormack, Alex Scott*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Mast cells and fibroblasts are two key players involved in many fibrotic and degenerative disorders. In the present study we examined the nature of binding interactions between human mast cells and tendon fibroblasts (tenocytes). In the mast cellfibroblast co-culture model, mast cells were shown to spontaneously bind to tenocytes, in a process that was partially mediated by α5β1 integrin receptors. The same receptors on mast cells significantly mediated binding of these cells to tissue culture plates in the presence of tenocyte-conditioned media; the tenocyte-derived fibronectin in the media was shown to also play a major role in these binding activities. Upon binding to tenocytes or tissue culture plates, mast cells acquired an elongated phenotype, which was dependent on α5β1 integrin and tenocyte fibronectin. Additionally, tenocyte-derived fibronectin significantly enhanced mRNA expression of the adhesion molecule, THY1, by mast cells. Our data suggests that α5β1 integrin mediates binding of mast cells to human tenocyte and to tenocyte-derived ECM proteins, in particular fibronectin.

Original languageEnglish (US)
Pages (from-to)9-16
Number of pages8
JournalJournal of Orthopaedic Research
Issue number1
StatePublished - Jan 1 2015


  • Fibroblasts
  • Fibronectin
  • Mast cells
  • Tenocytes
  • α5β1

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine


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