Characterization of stitch adhesions: Fibronectin-containing cell-cell contacts formed by fibroblasts.
Exp Cell Res
; 384(1): 111616, 2019 11 01.
Article
em En
| MEDLINE
| ID: mdl-31499058
ABSTRACT
Fibronectin is a multifunctional, extracellular matrix glycoprotein that exists either as an insoluble multimeric fibrillar component of the extracellular matrix or as a soluble monomer. Cells attach to fibronectin through transmembrane integrin receptors and form a variety of cell-matrix contacts. Here we show that primary fibroblasts can use fibronectin to organize a specific cell-cell contact - "stitch adhesions." This contact is formed by short parallel fibronectin fibrils connecting adjacent cells above the level of the focal adhesions that attach the cells to the substrate. Stitch adhesions contain integrin α5ß1 but not αVß3, align with actin filament bundles, and contain talin, tensin, α-actinin, vinculin, paxillin and a phosphorylated form of focal adhesion kinase. This combination of components differs from the described constituents of the known cell adhesions. Stitch adhesions are organized when protein synthesis and secretion are inhibited by cycloheximide and exogenous fibronectin is provided to the cells. The adhesion stitches described here provide an attractive model system for studying fibronectin fibrillogenesis and the mechanisms governing the formation of cellular adhesions.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Adesão Celular
/
Fibronectinas
/
Fibroblastos
Limite:
Humans
Idioma:
En
Revista:
Exp Cell Res
Ano de publicação:
2019
Tipo de documento:
Article