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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Interface between breast cancer cells and the tumor microenvironment using platelet-rich plasma to promote tumor angiogenesis - influence of platelets and fibrin bundles on the behavior of breast tumor cells

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Andrade, Sheila Siqueira ; Sumikawa, Joana Tomomi ; Castro, Eloisa Dognani ; Batista, Fabricio Pereira ; Paredes-Gamero, Edgar ; Oliveira, Lilian Carolina ; Guerra, Izabel Monasterio ; Peres, Giovani Bravin ; Cavalheiro, Renan Pelluzzi ; Juliano, Luiz ; Nazario, Afonso Pinto ; Facina, Gil ; Tsai, Siu Mui ; Vilela Oliva, Maria Luiza ; Batista Castello Girao, Manoel Joao
Número total de Autores: 15
Tipo de documento: Artigo Científico
Fonte: ONCOTARGET; v. 8, n. 10, p. 16851-16874, 2017.
Citações Web of Science: 12
Resumo

Cancer progression is associated with an evolving tissue interface of direct epithelial-tumor microenvironment interactions. In biopsies of human breast tumors, extensive alterations in molecular pathways are correlated with cancer staging on both sides of the tumor-stroma interface. These interactions provide a pivotal paracrine signaling to induce malignant phenotype transition, the epithelial-mesenchymal transition (EMT). We explored how the direct contact between platelets-fibrin bundles primes metastasis using platelet-rich plasma (PRP) as a source of growth factors and mimics the provisional fibrin matrix between actively growing breast cancer cells and the tumor stroma. We have demonstrated PRP functions, modulating cell proliferation that is tumor-subtype and cancer cell-type-specific. Epithelial and stromal primary cells were prepared from breast cancer biopsies from 21 women with different cancer subtypes. Cells supplemented with PRP were immunoblotted with anti-phospho and total Src-Tyr-416, FAK-Try-925, E-cadherin, N-cadherin, TGF-beta, Smad2, and Snail monoclonal antibodies. Breast tumor cells from luminal B and HER2 subtypes showed the most malignant profiles and the expression of thrombin and other classes of proteases at levels that were detectable through FRET peptide libraries. The angiogenesis process was investigated in the interface obtained between platelet-fibrin-breast tumor cells co-cultured with HUVEC cells. Luminal B and HER2 cells showed robust endothelial cell capillary-like tubes ex vivo. The studied interface contributes to the attachment of endothelial cells, provides a source of growth factors, and is a solid substrate. Thus, replacement of FBS supplementation with PRP supplementation represents an efficient and simple approach for mimicking the real multifactorial tumor microenvironment. (AU)

Processo FAPESP: 12/19780-3 - Cultura heterotípica: efeitos da associação entre células epiteliais, estroma mamário, macrófagos e plaquetas no câncer de mama: liberação de enzimas proteolíticas e sinalização dos receptores toll-like
Beneficiário:Manoel João Batista Castello Girão
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 12/19851-8 - Cultura heterotípica: interação células epiteliais, estroma mamário, macrófagos e plaquetas no câncer de mama: liberação de enzimas proteolíticas, sinalização dos receptores toll-like e sua correlação com o prognóstico
Beneficiário:Sheila Siqueira Andrade
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 09/53766-5 - Proteínas de origem vegetal com seletividade para inibição de enzimas de mamíferos e seu papel como agente anti-inflamatório, antitrombótico, antidiabético e antitumoral
Beneficiário:Maria Luiza Vilela Oliva
Linha de fomento: Auxílio à Pesquisa - Temático