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Erschienen in: Tumor Biology 1/2010

01.01.2010 | Research Article

Laminin-derived peptide AG73 regulates migration, invasion, and protease activity of human oral squamous cell carcinoma cells through syndecan-1 and β1 integrin

verfasst von: Adriane S. Siqueira, Letícia N. Gama-de-Souza, Maria Vanda C. Arnaud, João J. V. Pinheiro, Ruy G. Jaeger

Erschienen in: Tumor Biology | Ausgabe 1/2010

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Abstract

Squamous cell carcinoma is a prevalent head and neck tumor with high mortality. We studied the role played by laminin α1 chain peptide AG73 on migration, invasion, and protease activity of cells (OSCC) from human oral squamous cell carcinoma. Immunohistochemistry and immunofluorescence analyzed expression of laminin α1 chain and MMP9 in oral squamous cells carcinoma in vivo and in vitro. Migratory activity of AG73-treated OSCC cells was investigated by monolayer wound assays and in chemotaxis chambers. AG73-induced invasion was assessed in Boyden chambers. Invasion depends on MMPs. Conditioned media from cells grown on AG73 was subjected to zymography. We searched for AG73 receptors related to these activities in OSCC cells. Immunofluorescence analyzed AG73-induced colocalization of syndecan-1 and β1 integrin. Cells had these receptors silenced by siRNA, followed by treatment with AG73 and analysis of migration, invasion, and protease activity. Oral squamous cell carcinoma expresses laminin α1 chain and MMP9. OSCC cells treated with AG73 showed increased migration, invasion, and protease activity. AG73 induced colocalization of syndecan-1 and β1 integrin. Knockdown of these receptors decreased AG73-dependent migration, invasion, and protease activity. Syndecan-1 and β1 integrin signaling downstream of AG73 regulate migration, invasion, and MMP production by OSCC cells.
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Metadaten
Titel
Laminin-derived peptide AG73 regulates migration, invasion, and protease activity of human oral squamous cell carcinoma cells through syndecan-1 and β1 integrin
verfasst von
Adriane S. Siqueira
Letícia N. Gama-de-Souza
Maria Vanda C. Arnaud
João J. V. Pinheiro
Ruy G. Jaeger
Publikationsdatum
01.01.2010
Verlag
Springer Netherlands
Erschienen in
Tumor Biology / Ausgabe 1/2010
Print ISSN: 1010-4283
Elektronische ISSN: 1423-0380
DOI
https://doi.org/10.1007/s13277-009-0008-x

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