Navegando por Palavras-chave "Neoplastic metastasis"

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    Cirurgia mamária em mulheres com câncer de mama metastático. Revisão sistemática Cochrane e metanálise
    (Universidade Federal de São Paulo (UNIFESP), 2018-06-28) Tosello, Giuliano Tavares [UNIFESP]; Riera, Rachel [UNIFESP]; http://lattes.cnpq.br/0591884301805680; Tosello, Giuliano Tavares; Universidade Federal de São Paulo (UNIFESP)
    Objective: To evaluate the efficacy of breast surgery in patients with metastatic breast cancer. Methods: A systematic review was conducted according to the Cochrane methodology. The electronic search was performed on February 22, 2016, using the MeSH terms "breast neoplasms", "mastectomy" and "analysis, survival" in the following electronic databases: the Cochrane Breast Cancer Specialized Register, CENTRAL, MEDLINE (by PubMed), EMBASE (by OvidSP), LILACS, ClinicalTrials.gov and the WHO International Clinical Trials Registry Platform. Hand search on citation reference lists and contact with study authors to identify additional studies completed the search procedures. Randomized clinical trials with women diagnosed with metastatic breast cancer, comparing breast surgery associated with systemic therapy versus systemic therapy, were included. Two independent researchers evaluated the studies obtained in the electronic search regarding the eligibility criteria and the risk of bias. The risk of bias in the included studies was assessed by the Cochrane Risk of Bias tool. The quality of the evidences was evaluated using the GRADE tool. The risk ratio (RR) was used to measure the treatment effect for dichotomous outcomes, mean differences (MD) for continuous outcomes, and risk ratio (HR) for timetoevent outcomes. Confidence intervals of 95% (95% CI) were calculated for these measures. The primary outcome was overall survival and quality of life. Secondary outcomes were progressionfree survival (local and distance control), breast cancerspecific survival and toxicity from local therapy. Results: Two randomized clinical trials involving 624 participants were included. Breast surgery did not improve the overall survival of women with metastatic cancer (HR = 0.83, 95% CI 0.531.31, very lowquality evidence), but the progressionfree survival site was 78% better (HR = 0.22, 95% CI 0.08 0.57, low quality evidence), and metastatic progressionfree survival worsened by 40% (HR 1.42, 95% CI 1.081.86, moderate quality evidence). Conclusion: Based on poor quality evidence from two randomized clinical trials, it is not possible to reach definitive conclusions about the risks and benefits of breast surgery in women with metastatic breast cancer.
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    Estudos dos efeitos de concentrações crescentes de óxido nitrico no processo de morte por perda de adesão ao substrato (Anoikis): o papel desempenhado no processo pela proteína Src quinase
    (Universidade Federal de São Paulo (UNIFESP), 2017-05-30) Costa, Paulo Eduardo da [UNIFESP]; Monteiro, Hugo Pequeno [UNIFESP]; http://lattes.cnpq.br/6154759166234850; http://lattes.cnpq.br/2047870426131771; Universidade Federal de São Paulo (UNIFESP)
    The study of cell death induced by loss of adhesion (anoikis) is essential to understand how metastatic tumor cells may develop resistance to this type of cell death. Among a number of factors that can influence anoikis, nitric oxide has your role little known in relation to this issue. In adhered cells, it is known that nitric oxide induces cellular proliferation at low concentrations, as well as induces cell death after the treatment with high concentrations. However, in our study, we observed that detached cells behave in a different mode when treated with increase concentrations of NO: Low concentrations of NO induces drop on cell viability in detached HeLa cells, as well as increase levels of cleaved caspase-3. Since high concentrations of NO induces anoikis protection, with increase on cell viability, decreased of caspase-3 cleavage and decrase of expression of Bim protein. Src kinase has been shown to have key role in this mechanism, being phosphorylated and nitrosylated following treatment with high concentrations of NO. Inhibition of Src, can reverse this protection induced by high concentrations of NO with respect to cell viability and expression of Bim protein.These viability results were reproduced in Nex8H metastatic melanomas, but not in non metastatic melanomas Nex10C. In HeLa cells kept in suspension, NO in high concentrations induced cell disaggregation in a Src dependent manner. NO-dependent disaggregation can be reproduced in murine melanoma cells Nex8H and Nex10C. Increasing concentrations of NO decreased the effectiveness of reattachment of HeLa cells kept in suspension. Src kinase showed no role in the process. We know that tumor cells often produce high concentrations of NO. This study shows up as a first step in understanding how these cells can migrate from a primary to a secondary source and got to readhere regarding the role of increasing concentrations of NO in the process.
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    Melanoma developed during pregnancy - A case report
    (Sociedade Brasileira de Dermatologia, 2014-01-01) Mestnik, Natalia Cammarosano; Afonso, Joao Paulo Junqueira Magalhaes; Enokihara, Milvia Maria Simoes E Silva; Enokihara, Mauro Yoshiaki; Porro, Adriana Maria [UNIFESP]; Hirata, Sergio Henrique [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    We describe a case of plantar interdigital cutaneous melanoma in a 22-year-old woman who reported changes in a pigmented lesion during pregnancy. Diagnosis was late and evolution unfavourable. The purpose of this report is to draw the attention of dermatologists to the need for careful regular examination of melanocytic lesions in pregnant women, not ignoring possible changes as always physiological.