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| Katayama,M.L.H.; Brentani,H.; Abreu,A.P.S.; Barbosa,E.M.; Oliveira,C.T.; Góes,J.C.S.; Brentani,M.M.; Folgueira,M.A.A.K.. |
| In breast cancer patients submitted to neoadjuvant chemotherapy (4 cycles of doxorubicin and cyclophosphamide, AC), expression of groups of three genes (gene trio signatures) could distinguish responsive from non-responsive tumors, as demonstrated by cDNA microarray profiling in a previous study by our group. In the current study, we determined if the expression of the same genes would retain the predictive strength, when analyzed by a more accessible technique (real-time RT-PCR). We evaluated 28 samples already analyzed by cDNA microarray, as a technical validation procedure, and 14 tumors, as an independent biological validation set. All patients received neoadjuvant chemotherapy (4 AC). Among five trio combinations previously identified, defined by nine... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Breast neoplasms; Discriminant analysis; Doxorubicin; Drug resistance; Neoadjuvant therapy; Reverse transcriptase-polymerase chain reaction. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2010001200012 |
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| Wang,X.M.; Gao,S.J.; Guo,X.F.; Sun,W.J.; Yan,Z.Q.; Wang,W.X.; Xu,Y.Q.; Lu,D.. |
| Overexpression of cytokine-induced apoptosis inhibitor 1 (CIAPIN1) contributes to multidrug resistance (MDR) in breast cancer. This study aimed to evaluate the potential of CIAPIN1 gene silencing by RNA interference (RNAi) as a treatment for drug-resistant breast cancer and to investigate the effect of CIAPIN1 on the drug resistance of breast cancer in vivo. We used lentivirus-vector-based RNAi to knock down CIAPIN1 in nude mice bearing MDR breast cancer tumors and found that lentivirus-vector-mediated silencing of CIAPIN1 could efficiently and significantly inhibit tumor growth when combined with chemotherapy in vivo. Furthermore, Western blot analysis showed that both CIAPIN1 and P-glycoprotein expression were efficiently downregulated, and P53 was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: CIAPIN1 gene; Multidrug resistance; RNA interference; MDR1 gene; Breast neoplasms. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2014000400273 |
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| Zhao,L.; Li,N.; Yu,J.K.; Tang,H.T.; Li,Y.L.; He,M.; Yu,Z.J.; Bai,X.F.; Zheng,Z.H.; Wang,E.H.; Wei,M.J.. |
| Fanconi anemia complementation group F protein (FANCF) is a key factor, which maintains the function of FA/BRCA, a DNA damage response pathway. However, the functional role of FANCF in breast cancer has not been elucidated. We performed a specific FANCF-shRNA knockdown of endogenous FANCF in vitro. Cell viability was measured with a CCK-8 assay. DNA damage was assessed with an alkaline comet assay. Apoptosis, cell cycle, and drug accumulation were measured by flow cytometry. The expression levels of protein were determined by Western blot using specific antibodies. Based on these results, we used cell migration and invasion assays to demonstrate a crucial role for FANCF in those processes. FANCF shRNA effectively inhibited expression of FANCF. We found... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fanconi anemia complementation group F protein; Breast neoplasms; Tumor cell line. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2014000100024 |
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| Carvalho,S.M.T.; Mourão Netto,M.; Lima,E.N.P.; Pimentel,A.M.; Makdissi,F.B.; Osório,C.A.B.T.; Maciel,M.S.; Iyeyasu,H.; Collins,J.B.; Fontes,C.M.; Perina,A.L.; Soares,F.A.. |
| Sentinel lymph node biopsy (SLNB) is an appropriate method for the evaluation of axillary status in cases of early breast cancer. We report our experience in treating cases evaluated using SLNB. We analyzed a total of 1192 cases assessed by means of SLNB from July 1999 to December 2007. SLNB processing was successfully completed in 1154 cases with the use of blue dye or radiolabeled 99mTc-Dextran-500, or both. Of these 1154 patients, 857 were N0(i-) (no regional lymph node metastasis, negative immunohistochemistry, IHC), 96 were N0(i+) (no regional lymph node metastasis histologically, positive IHC, no IHC cluster greater than 0.2 mm) and 201 were N1mi (greater than 0.2 mm, none greater than 2.0 mm). Most of the tumors (70%) were invasive ductal carcinomas... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Breast neoplasms; Sentinel lymph node; Sentinel lymph node biopsy; Completion axillary dissection. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2010000600011 |
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