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FGF-2, TGFâ-1, PDGF-A and respective receptors expression in pleomorphic adenoma myoepithelial cells: an in vivo and in vitro study
Miguita, Lucyene; Martinez, Elizabeth Ferreira; Araújo, Ney Soares de; Araújo, Vera Cavalcanti de.
  • Miguita, Lucyene; São Leopoldo Mandic Institute and Research Center. Department of Oral Pathology. Campinas. BR
  • Martinez, Elizabeth Ferreira; São Leopoldo Mandic Institute and Research Center. Department of Oral Pathology. Campinas. BR
  • Araújo, Ney Soares de; São Leopoldo Mandic Institute and Research Center. Department of Oral Pathology. Campinas. BR
  • Araújo, Vera Cavalcanti de; São Leopoldo Mandic Institute and Research Center. Department of Oral Pathology. Campinas. BR
J. appl. oral sci ; 18(1): 83-91, Jan.-Feb. 2010. ilus
Artigo em Inglês | LILACS | ID: lil-545031
ABSTRACT
Myoepithelial cells have an important role in salivary gland tumor development, contributing to a low grade of aggressiveness of these tumors. Normal myoepithelial cells are known by their suppressor function presenting increased expression of extracellular matrix genes and protease inhibitors. The importance of stromal cells and growth factors during tumor initiation and progression has been highlighted by recent literature. Many tumors result from the alteration of paracrine growth factors pathways. Growth factors mediate a wide variety of biological processes such as development, tissue repair and tumorigenesis, and also contribute to cellular proliferation and transformation in neoplastic cells.

OBJECTIVES:

This study evaluated the expression of fibroblast growth factor-2 (FGF-2), transforming growth factor â-1 (TGFâ-1), platelet-derived growth factor-A (PDGF-A) and their respective receptors (FGFR-1, FGFR-2, TGFâR-II and PDGFR-á) in myoepithelial cells from pleomorphic adenomas (PA) by in vivo and in vitro experiments. MATERIAL AND

METHODS:

Serial sections were obtained from paraffin-embedded PA samples obtained from the school's files. Myoepithelial cells were obtained from explants of PA tumors provided by surgery from different donors. Immunohistochemistry, cell culture and immunofluorescence assays were used to evaluate growth factor expression.

RESULTS:

The present findings demonstrated that myoepithelial cells from PA were mainly positive to FGF-2 and FGFR-1 by immunohistochemistry and immunofluorescence. PDGF-A and PDGFR-á had moderate expression by immunohistochemistry and presented punctated deposits throughout cytoplasm of myoepithelial cells. FGFR-2, TGFâ-1 and TGFâR-II were negative in all samples.

CONCLUSIONS:

These data suggested that FGF-2 compared to the other studied growth factors has an important role in PA benign myoepithelial cells, probably contributing to proliferation of ...
Assuntos

Texto completo: DisponíveL Índice: LILACS (Américas) Assunto principal: Fator de Crescimento Derivado de Plaquetas / Neoplasias das Glândulas Salivares / Proteínas Serina-Treonina Quinases / Receptores de Fatores de Crescimento Transformadores beta / Adenoma Pleomorfo / Receptor alfa de Fator de Crescimento Derivado de Plaquetas / Receptor Tipo 1 de Fator de Crescimento de Fibroblastos / Fator de Crescimento Transformador beta1 Limite: Adulto / Feminino / Humanos / Masculino Idioma: Inglês Revista: J. appl. oral sci Assunto da revista: Odontologia Ano de publicação: 2010 Tipo de documento: Artigo / Documento de projeto País de afiliação: Brasil Instituição/País de afiliação: São Leopoldo Mandic Institute and Research Center/BR

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Texto completo: DisponíveL Índice: LILACS (Américas) Assunto principal: Fator de Crescimento Derivado de Plaquetas / Neoplasias das Glândulas Salivares / Proteínas Serina-Treonina Quinases / Receptores de Fatores de Crescimento Transformadores beta / Adenoma Pleomorfo / Receptor alfa de Fator de Crescimento Derivado de Plaquetas / Receptor Tipo 1 de Fator de Crescimento de Fibroblastos / Fator de Crescimento Transformador beta1 Limite: Adulto / Feminino / Humanos / Masculino Idioma: Inglês Revista: J. appl. oral sci Assunto da revista: Odontologia Ano de publicação: 2010 Tipo de documento: Artigo / Documento de projeto País de afiliação: Brasil Instituição/País de afiliação: São Leopoldo Mandic Institute and Research Center/BR