Differential cell adhesion to vocal fold extracellular matrix constituents.
The human vocal folds are a complex layering of cells and extracellular matrix. Vocal fold extracellular matrix uniquely contributes to the biomechanical viscoelasticity required for human phonation. We investigated the adhesion of vocal fold stellate cells, a novel cell type first cultured by our laboratory, and fibroblasts to eight vocal fold extracellular matrix components: elastin, decorin, fibronectin, hyaluronic acid, laminin and collagen types I, III and IV. Our data demonstrate that these cells adhere differentially to said substrates at 5 to 120 min. Cells were treated with hyaluronidase and Y-27632, a p160ROCK-specific inhibitor, to test the role of pericellular hyaluronan and Rho-ROCK activation in early and mature adhesion. Reduced adhesion resulted; greater inhibition of fibroblast adhesion was observed. We modulated the fibronectin affinity exhibited by both cell types using Nimesulide, an inhibitor of fibronectin integrin receptors alpha5beta1 and alphavbeta3. Our results are important in understanding vocal fold pathologies, wound healing, scarring, and in developing an accurate organotypic model of the vocal folds.
National Center for Voice and Speech, Department of Speech Pathology and Audiology, The University of Iowa, Iowa City, IA 52242, USA. tannin-fuja@uiowa.edu
Tannin J
TJ
Fuja
Erin M
EM
Ostrem
Megan N
MN
Probst-Fuja
Ingo R
IR
Titze
D002448:Cell Adhesion; D003094:Collagen / Q000378:metabolism; D058575:Decorin; D004549:Elastin / Q000378:metabolism; D005109:Extracellular Matrix / Q000378:metabolism*; D016326:Extracellular Matrix Proteins / Q000378:metabolism; D005347:Fibroblasts / Q000166:cytology / Q000187:drug effects; D005353:Fibronectins / Q000378:metabolism; D006801:Humans; D006820:Hyaluronic Acid / Q000378:metabolism; D006821:Hyaluronoglucosaminidase / Q000494:pharmacology; D007797:Laminin / Q000378:metabolism; D011509:Proteoglycans / Q000378:metabolism; D014132:Trachea / Q000166:cytology / Q000187:drug effects; D014827:Vocal Cords / Q000166:cytology* / Q000378:metabolism*
C546878:DCN protein, human; D058575:Decorin; D016326:Extracellular Matrix Proteins; D005353:Fibronectins; D007797:Laminin; D011509:Proteoglycans; D006820:Hyaluronic Acid; D003094:Collagen; D004549:Elastin; D006821:Hyaluronoglucosaminidase