Evaluation of photodynamic therapy in adhesion protein expression

Autor(es)

Pacheco-Soares, Cristina ^[1] ; Maftou-Costa, Maira ^[2] ; Da Cunha Menezes Costa, Carolina Genuncio ^[1] ; De Siqueira Silva, Andreza Cristina ^[1] ; Moraes, Karen C. M. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Vale do Paraiba, Inst Res & Dev, Lab Dynam Cellular Compartments, BR-12244000 Sao Jose Dos Campos, SP - Brazil

^[2] Univ Fed Sao Paulo, Dept Pharmacol, BR-04021001 Sao Paulo - Brazil

^[3] Univ Sao Paulo, Inst Biosci Rio Claro, BR-13506900 Rio Claro, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Oncology Letters; v. 8, n. 2, p. 714-718, AUG 2014.
• Citações Web of Science: 7

Resumo

Photodynamic therapy (PDT) is a treatment modality that has clinical applications in both non-neoplastic and neoplastic diseases. PDT involves a light-sensitive compound (photosensitizer), light and molecular oxygen. This procedure may lead to several different cellular responses, including cell death. Alterations in the attachment of cancer cells to the substratum and to each other are important consequences of photodynamic treatment. PDT may lead to changes in the expression of cellular adhesion structure and cytoskeleton integrity, which are key factors in decreasing tumor metastatic potential. HEp-2 cells were photosensitized with aluminum phthalocyanine tetrasulfonate and zinc phthalocyanine, and the proteins beta 1-integrin and focal adhesion kinase (FAK) were assayed using fluorescence microscopy. The verification of expression changes in the genes for FAK and beta 1 integrin were performed by reverse transcription-polymerase chain reaction (RT-PCR). The results revealed that HEp-2 cells do not express beta-integrin or FAK 12 h following PDT. It was concluded that the PDT reduces the adhesive ability of HEp-2 cells, inhibiting their metastatic potential. The present study aimed to analyze the changes in the expression and organization of cellular adhesion elements and the subsequent metastatic potential of HEp-2 cells following PDT treatment. (AU)

• Processo FAPESP: 06/06736-5 - Expressão e organização de elementos da adesão celular após TFD
• Beneficiário: Cristina Pacheco Soares
• Modalidade de apoio: Auxílio à Pesquisa - Regular