Busca avançada
Ano de início
Entree
(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.)

Cathepsin K induces platelet dysfunction and affects cell signaling in breast cancer - molecularly distinct behavior of cathepsin K in breast cancer

Texto completo
Autor(es):
Mostrar menos -
Andrade, Sheila Siqueira [1, 2, 3] ; Gouvea, Iuri Estrada [4] ; Silva, Mariana Cristina C. [5] ; Castro, Eloisa Dognani [5] ; de Paula, Claudia A. A. [5] ; Okamoto, Debora [4] ; Oliveira, Lilian [4] ; Peres, Giovani Bravin [5] ; Ottaiano, Tatiana [5] ; Facina, Gil [1, 2] ; Pinto Nazario, Afonso Celso [1, 2] ; Campos, Antonio Hugo J. F. M. [6] ; Paredes-Gamero, Edgar Julian [5] ; Juliano, Maria [4] ; da Silva, Ismael D. C. G. [1, 2] ; Oliva, Maria Luiza V. [5] ; Girao, Manoel J. B. C. [1, 2]
Número total de Autores: 17
Afiliação do(s) autor(es):
[1] Univ Fed Sao Paulo, Dept Gynecol, BR-04024002 Sao Paulo, SP - Brazil
[2] COLSAN, Charitable Assoc Blood Collect, BR-04080006 Sao Paulo, SP - Brazil
[3] Univ Fed Sao Paulo, Cellular Gynecol Lab, Dept Gynecol, Rua Napoleao Barros 608, BR-04024002 Sao Paulo - Brazil
[4] Univ Fed Sao Paulo, Dept Biophys, BR-04024002 Sao Paulo, SP - Brazil
[5] Univ Fed Sao Paulo, Dept Biochem, BR-04024002 Sao Paulo, SP - Brazil
[6] Antonio Prudente Fdn, AC Camargo Canc Ctr, AC Camargo Hosp Biobank, Dept Pathol, BR-01509010 Sao Paulo, SP - Brazil
Número total de Afiliações: 6
Tipo de documento: Artigo Científico
Fonte: BMC CANCER; v. 16, MAR 1 2016.
Citações Web of Science: 7
Resumo

Background: Breast cancer comprises clinically and molecularly distinct tumor subgroups that differ in cell histology and biology and show divergent clinical phenotypes that impede phase III trials, such as those utilizing cathepsin K inhibitors. Here we correlate the epithelial-mesenchymal-like transition breast cancer cells and cathepsin K secretion with activation and aggregation of platelets. Cathepsin K is up-regulated in cancer cells that proteolyze extracellular matrix and contributes to invasiveness. Although proteolytically activated receptors (PARs) are activated by proteases, the direct interaction of cysteine cathepsins with PARs is poorly understood. In human platelets, PAR-1 and -4 are highly expressed, but PAR-3 shows low expression and unclear functions. Methods: Platelet aggregation was monitored by measuring changes in turbidity. Platelets were immunoblotted with anti-phospho and total p38, Src-Tyr-416, FAK-Tyr-397, and TGF beta monoclonal antibody. Activation was measured in a flow cytometer and calcium mobilization in a confocal microscope. Mammary epithelial cells were prepared from the primary breast cancer samples of 15 women with Luminal-B subtype to produce primary cells. Results: We demonstrate that platelets are aggregated by cathepsin K in a dose-dependent manner, but not by other cysteine cathepsins. PARs-3 and -4 were confirmed as the cathepsin K target by immunodetection and specific antagonists using a fibroblast cell line derived from PARs deficient mice. Moreover, through co-culture experiments, we show that platelets activated by cathepsin K mediated the up-regulation of SHH, PTHrP, OPN, and TGF beta in epithelial-mesenchymal-like cells from patients with Luminal B breast cancer. Conclusions: Cathepsin K induces platelet dysfunction and affects signaling in breast cancer cells. (AU)

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
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: 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