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Objective:To investigate the prognostic value of molecular subtypes in patients with resected invasive breast cancer.Methods:Between 2015 and 2018 7 869 patients with invasive breast cancer after undergoing surgery were included in this analysis. Breast cancer was classified into four subtypes according to the status of hormone receptor (HR) and HER2: HR+/HER2-, HR+/HER2+, HR-/HER2+, and HR-/HER2-. Kaplan-Meier curves and COX regression were used to compare disease-free survival (DFS) and overall survival (OS) among different subtypes.Results:The 5-year DFS and OS were 86.30% and 94.29%, respectively. Proportions of HR+/HER2-、HR+/HER2+、HR-/HER2+ and HR-/HER2- were 52.9%、17.5%、14.1%和15.5%, respectively. The 5-year DFS of HR+/HER2- subtype (88.12%) was higher than HR+/HER2+ (84.67%, P=0.026), HR-/HER2+ (84.19%, P<0.001) and HR-/HER2- (83.70%, P<0.001). The 5-year OS of HR+/HER2- (95.38%) was not different from HR+/HER2+ (95.17%, P=0.187), while it was higher than that of HR-/HER2+ (92.26%, P<0.001) and HR-/HER2- (91.69%, P<0.001). Subtype was still a significant factor regarding DFS and OS in multivariable analyses adjusting for age, sex, stage, Ki67, types and time of surgery. The DFS ( P=0.257) and OS ( P=0.511) was not different between HR-/HER2+与HR+/HER2- subtypes, while HR-/HER2+ and HR-/HER2- patients had worse DFS ( P<0.05) and OS ( P<0.05) than that with HR+/HER2-. Conclusions:Molecular subtype is a significant independent prognostic factor for DFS and OS in operable invasive breast cancer. HR+ subtypes have better prognosis compared with HR- subtypes. The DFS and OS were not different between HR+/HER2- and HR+/HER2+, or between HR-/HER2+ and HR-/HER2-.
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Nanobiotechnology has emerged as a promising technology to develop new therapeutically active nanomaterials. The present study was aimed to biosynthesize AgNPs extracellularly using Aspergillus niger JX556221 fungal extract and to evaluate their anticancer potential against colon cancer cell line, HT-29. UV-visible spectral characterization of the synthesized AgNPs showed higher absorption peak at 440 nm wavelength. Transmission Electron Microscopy (TEM) analysis revealed the monodispersed nature of synthesized AgNPs occurring in spherical shape with a size in the range of 20-25 nm. Further, characterization using Energy Dispersive Spectroscopy (EDX) confirmed the face-centred cubic crystalline structure of metallic AgNPs. FTIR data revealed the occurrence of various phytochemicals in the cell free fungal extract which substantiated the fungal extract mediated AgNPs synthesis. The cytotoxic effect of AgNPs was studied by using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. The results evidenced the cytotoxic effect of AgNPs on HT-29 cell lines in a dose dependent manner. The highest activity was found at 100 µg/ml concentration after 24 h of incubation. Use of propidium iodide staining examination method confirmed the cytotoxic effect of AgNPs through inducing cell apoptosis. AgNPs cytotoxicity was found to be through elevating reactive oxygen species (ROS), and caspase-3 activation resulting in induced apoptosis. Therefore, this research finding provides an insight towards the development of novel anticancer agents using biological sources.
Subject(s)
Colonic Neoplasms/drug therapy , Metal Nanoparticles/therapeutic use , Plant Extracts/therapeutic use , Silver , Aspergillus niger , Cell Line , HumansABSTRACT
Objective To investigate the effect of vitamin E on progression of breast cancer tumor and to explore its underlying mechanism.Methods Human Breast cancer cells MCF-7 were inoculated into mice to establish mouse model of breast cancer and MCF-7 cell was cultured in vitro.Reactive oxygen species (ROS)level and p53 expression were determined by fluorescence probe CM-H2DCFDA and Western blot respectively.In addition,proliferation of human breast cancer cells MCF-7 was observed after transfected by siRNA targeting p53.Results Supplementing the diet with vitamin E markedly increased tumor progression and decreased ROS level and p53 expression in tumor tissue.Supplementing the culture medium with trolox significantly accelerated the growth of MCF-7 and decreased ROS level and p53 expression in tumor cells.p53-siRNA could eliminate p53 expression in MCF-7 and increase the proliferation of MCF-7 cells.Conclusion Vitamin E can accelerate breast cancer tumor progression by reducing ROS level and decreasing the expression of p53 in tumor cells.
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Objective To investigate general and clinicopathological characteristics of male breast cancer and analyze the factors affecting the outcomes of the patients.Methods Fifty-nine male breast cancer patients treated at Cancer Hospital of Zhengzhou University from January 2002 to December 2011 were included into the study.The clinicopathologic features and 5-year survival rate were retrospectively analyzed.The clinicopathologieal characteristics were investigated by univariate analysis to evaluate the impact of these factors on patient survival.Results The median age at diagnosis was 64 years old in these patients.The positive rate of ER/PR was 74.6 ％ (44/59).The patients were followed up for 9-123 months.The 5-year survival rate was 61％.Patients in stages Ⅰ and Ⅱ had better overall survival than those in stages Ⅲ and Ⅳ.Conclusion The male breast cancer patient has special clinical characteristics.TNM stage is a significant predictor of the overall survival.
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Objective To investigate the efficacy of TTC and FTC regimens as neoadjuvant chemotherapy in breast cancer. Methods Collecting clinical data of 325 patients received neoadjuvant chemotherapy with TIC and FTC regimens from June 2004 to April 2008, among them 138 patients received neoadjuvant chemotherapy with TTC regimen in one group, and 187 patients received neoadjuvant chemotherapy with CTF regimen in the other group. The expression of Topo Ⅱ a in specimen of 325 patients before neoadjuvant chemotherapy were detected by immunohistochemical method. Results Among the 325 cases of neoadjuvant chemotherapy, the overall response rate (RR) was 87.7 % in TIC arm and 67.4 % in FTC arm (P=0.000), but in the group of Topo Ⅱ a(+) Her-2(-), the overall response rate (RR) was 87.8 % in TTC arm and 79.4 % in FTC arm (P=0.266), and in the groups of Topo Ⅱ a(-), there was statistical significance; the pathologic complete response rate (pCR) was 13.7 % in TIC ann and 11.2 % in CTF ann (P=0.491). Conclusion TIC regimen is superior to FTC regimen in the response rate of neoadjuvant chemotherapy, but patients with negative expression of Topo Ⅱ a may get more benefits from 9eoadjuvant taxane and anthracycline chemotherapy.
