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https://www.readbyqxmd.com/read/29164887/pterostilbene-enhances-trail-induced-apoptosis-through-the-induction-of-death-receptors-and-downregulation-of-cell-survival-proteins-in-trail-resistance-triple-negative-breast-cancer-cells
#1
Chao-Ming Hung, Liang-Chih Liu, Chi-Tang Ho, Ying-Chao Lin, Tzong-Der Way
Tumor necrosis factor-related apoptosis-induced ligand (TRAIL) is nontoxic to normal cells and preferentially cytotoxic to cancer cells. However, recent data suggest that malignant breast cancer cells tend to be resistant to TRAIL. Pterostilbene (PTER), a natural dimethylated analog of resveratrol, is known to have diverse pharmacologic activities, including anticancer properties. In the present study, we investigated whether PTER affects TRAIL-induced apoptosis and its mechanism in TRAIL-resistant triple negative breast cancer (TNBC) cells...
November 22, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29163048/nicotinic-acetylcholine-receptor-subtype-alpha-9-mediates-triple-negative-breast-cancers-based-on-a-spontaneous-pulmonary-metastasis-mouse-model
#2
Li-Chi Huang, Ching-Ling Lin, Jia-Zheng Qiu, Chun-Yu Lin, Kai-Wen Hsu, Ka-Wai Tam, Jung-Yu Lee, Jinn-Moon Yang, Chia-Hwa Lee
Triple-negative breast cancer (TNBC) subtype is associated with poor prognosis and a high risk of recurrence-related death in women. Despite the aggressiveness of TNBCs, targeted TNBC therapy is not yet available in the clinic. To overcome this challenge, we generated highly metastatic TNBC cells (LM) derived from metastasized lung cells via a serial spontaneous pulmonary metastasis animal model to identify targetable molecules for attenuating the progression of TNBC metastasis. Gene analysis of primary tumor (P), first-round (1LM) and second-round (2LM) metastasized lung cells revealed that mesenchymal-related genes were significantly expressed in LM cells, especially in 2LM cells...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29162840/whey-protein-concentrate-renders-mda-mb-231-cells-sensitive-to-rapamycin-by-altering-cellular-redox-state-and-activating-gsk3%C3%AE-mtor-signaling
#3
Shih-Hsuan Cheng, Yang-Ming Tseng, Szu-Hsien Wu, Shih-Meng Tsai, Li-Yu Tsai
Whey protein concentrate (WPC) is an amino acid-rich supplement that has been shown to increase cellular antioxidant capacity. Mammalian target of rapamycin (mTOR) is a crucial regulator of signaling in mammalian cells, and serves as a therapeutic target for triple-negative breast cancer (TNBC). This study was designed to investigate the effect of combining WPC with rapamycin on MDA-MB-231 human breast cancer cells. These cells were found to be insensitive to rapamycin and exhibited higher glutathione (GSH) and reactive oxygen species levels than non-tumorigenic MCF-10A cells...
November 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29162812/role-of-epithelial-to-mesenchymal-transition-associated-genes-in-mammary-gland-regeneration-and-breast-tumorigenesis
#4
Shaheen S Sikandar, Angera H Kuo, Tomer Kalisky, Shang Cai, Maider Zabala, Robert W Hsieh, Neethan A Lobo, Ferenc A Scheeren, Sopheak Sim, Dalong Qian, Frederick M Dirbas, George Somlo, Stephen R Quake, Michael F Clarke
Previous studies have proposed that epithelial to mesenchymal transition (EMT) in breast cancer cells regulates metastasis, stem cell properties and chemo-resistance; most studies were based on in vitro culture of cell lines and mouse transgenic cancer models. However, the identity and function of cells expressing EMT-associated genes in normal murine mammary gland homeostasis and human breast cancer still remains under debate. Using in vivo lineage tracing and triple negative breast cancer (TNBC) patient derived xenografts we demonstrate that the repopulating capacity in normal mammary epithelial cells and tumorigenic capacity in TNBC is independent of expression of EMT-associated genes...
November 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/29161592/tumor-suppressor-inactivation-of-gdf11-occurs-by-precursor-sequestration-in-triple-negative-breast-cancer
#5
Sameer S Bajikar, Chun-Chao Wang, Michael A Borten, Elizabeth J Pereira, Kristen A Atkins, Kevin A Janes
Triple-negative breast cancer (TNBC) is an aggressive and heterogeneous carcinoma in which various tumor-suppressor genes are lost by mutation, deletion, or silencing. Here we report a tumor-suppressive mode of action for growth-differentiation factor 11 (GDF11) and an unusual mechanism of its inactivation in TNBC. GDF11 promotes an epithelial, anti-invasive phenotype in 3D triple-negative cultures and intraductal xenografts by sustaining expression of E-cadherin and inhibitor of differentiation 2 (ID2). Surprisingly, clinical TNBCs retain the GDF11 locus and expression of the protein itself...
November 20, 2017: Developmental Cell
https://www.readbyqxmd.com/read/29159771/cldn6-enhances-chemoresistance-to-adm-via-af-6-erks-pathway-in-tnbc-cell-line-mdamb231
#6
Minlan Yang, Yanru Li, Yang Ruan, Yan Lu, Dongjing Lin, Yinping Xie, Bing Dong, Qihua Dang, Chengshi Quan
Claudin-6 (CLDN6), a critical tight junction protein acting as a tumor suppressor in breast cancer, is also considered to be a stem cell marker. Triple-negative breast cancer (TNBC) is a subtype of claudin-low and stem cell-like breast cancer which is chemoresistant to multiple anti-cancer drugs. The aim of our study was to determine whether CLDN6 plays a role in chemoresistance of TNBC. We found that overexpression of CLDN6 in TNBC cell line MDAMB231 significantly inhibited cell growth, migration, and invasion...
November 20, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29158480/reversal-of-drug-resistance-by-noscapine-chemo-sensitization-in-docetaxel-resistant-triple-negative-breast-cancer
#7
Ravi Doddapaneni, Ketan Patel, Nusrat Chowdhury, Mandip Singh
Multidrug resistance (MDR) is a major impediment to cancer treatment. Here, for the first time, we investigated the chemo-sensitizing effect of Noscapine (Nos) at low concentrations in conjunction with docetaxel (DTX) to overcome drug resistance of triple negative breast cancer (TNBC). In vitro experiments showed that Nos significantly inhibited proliferation of TNBC wild type (p < 0.01) and drug resistant (p < 0.05) TNBC cells. Nos followed by DTX treatment notably increased the cell viability (~1...
November 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29158255/nitro-fatty-acid-inhibition-of-triple-negative-breast-cancer-cell-viability-migration-invasion-and-tumor-growth
#8
Chen-Shan Chen Woodcock, Yi Huang, Steven R Woodcock, Sonia R Salvatore, Bhupinder Singh, Franca Golin-Bisello, Nancy E Davidson, Carola Neumann, Bruce A Freeman, Stacy G Wendell
Triple negative breast cancer (TNBC) comprises ~20% of all breast cancers and is the most aggressive mammary cancer subtype. Devoid of the estrogen and progesterone receptors, along with the receptor tyrosine kinase ERB2 (HER2) that define most mammary cancers, there are no targeted therapies for patients with TNBC. This, combined with a high metastatic rate and a lower 5-year survival rate than for other breast cancer phenotypes, means there is significant unmet need for new therapeutic strategies. Herein, the anti-neoplastic effects of the electrophilic fatty acid nitroalkene derivative, 10-nitro-octadec-9-enoic acid (nitro-oleic acid, NO2-OA), were investigated in multiple preclinical models of TNBC...
November 20, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29156817/near-infrared-photothermal-therapy-using-anti-egfr-gold-nanorod-conjugates-for-triple-negative-breast-cancer
#9
Meihua Zhang, Hoe Suk Kim, Tiefeng Jin, Jisu Woo, Yin Ji Piao, Woo Kyung Moon
Current EGFR-targeted therapy for triple negative breast cancer (TNBC) has produced disappointing results. A rational therapeutic strategy to improve EGFR-targeted treatment for TNBC is therefore needed. In this study we evaluated the feasibility of treating TNBC using photoacoustic imaging (PAI)-guided near-infrared photothermal therapy (NIR-PTT) with anti-EGFR-conjugated gold nanorods (anti-EGFR-GN). NIR-PTT combined with anti-EGFR-GN exerted synergistic anti-proliferative and apoptotic actions through upregulation of HSP70 and cleaved caspase-3, downregulation of Ki-67 and EGFR, and inhibition of several intracellular signaling molecules (mTOR, AKT, ERK1/2 and FAK)...
October 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29156719/the-micrornas-mir-200b-3p-and-mir-429-5p-target-the-limk1-cfl1-pathway-to-inhibit-growth-and-motility-of-breast-cancer-cells
#10
Dengfeng Li, Hong Wang, Hongming Song, Hui Xu, Bingkun Zhao, Chenyang Wu, Jiashu Hu, Tianqi Wu, Dan Xie, Junyong Zhao, Qiang Shen, Lin Fang
Triple-negative breast cancer (TNBC) has the worst prognosis of all subtypes of breast cancer (BC), with limited options for conventional therapy and no targeted therapies. MicroRNAs (miRNAs) are small noncoding RNAs that negatively regulate gene expression. In this study, we aimed to determine whether two members of the miR-200 family, miR-200b-3p and miR-429-5p, are involved in BC cell proliferation and motility and to elucidate their target genes and pathways. We performed a meta-analysis that reveals down-regulated expression of miR-200b-3p and miR-429-5p in BC tissues and cell lines, consistent with a lower expression of miR-200b-3p and miR-429-5p in MDA-MB-231 and HCC1937 cells than in MCF-7 and MCF-10 cells...
October 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29156674/novel-combinations-of-pi3k-mtor-inhibitors-with-dacomitinib-or-chemotherapy-in-pten-deficient-patient-derived-tumor-xenografts
#11
Irene Brana, Nhu-An Pham, Lucia Kim, Shingo Sakashita, Ming Li, Christine Ng, Yuhui Wang, Peter Loparco, Rafael Sierra, Lisa Wang, Blaise A Clarke, Benjamin G Neel, Lillian L Siu, Ming-Sound Tsao
PTEN inactivation occurs commonly in human cancers and putatively activates the PI3K/AKT/ mTOR pathway. Activation of this pathway has been involved in resistance to chemotherapy or anti-EGFR/HER2 therapies. We evaluated the combination of PI3K-mTOR inhibitors with chemotherapy or the pan-HER inhibitor dacomitinib in PTEN-deficient patient-derived tumor xenografts (PDX). Three PDXs were selected for their lack of PTEN expression by immunohistochemistry: a triple-negative breast cancer (TNBC), a KRAS G12R low-grade serous ovarian cancer (LGSOC), and KRAS G12C and TP53 R181P lung adenocarcinoma (LADC)...
October 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29156515/linc00152-promotes-tumorigenesis-by-regulating-dnmts-in-triple-negative-breast-cancer
#12
Jiali Wu, Zeyu Shuang, Jianfu Zhao, Hailin Tang, Peng Liu, Lijuan Zhang, Xiaoming Xie, Xiangsheng Xiao
Long noncoding RNA (lncRNA) is a significant factor that regulates various aspects of genome activity, including tumor development and progression. Linc00152, a member of lncRNA, is unregulated in various types of cancer. However, its role in breast cancer, especially in triple-negative breast cancer (TNBC), is unclear. In this study, we found that linc00152 was highly expressed in all basal-like cell lines and in the majority of TNBC tissues. Linc00152 suppression by shRNA significantly inhibited invasion and colony growth...
November 13, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29154023/triple-negative-breast-cancer-in-asia-an-insider-s-view
#13
REVIEW
Chao Wang, Shreya Kar, Xianning Lai, Wanpei Cai, Frank Arfuso, Gautam Sethi, Peter E Lobie, Boon C Goh, Lina H K Lim, Mikael Hartman, Ching W Chan, Soo C Lee, Sing H Tan, Alan P Kumar
While tremendous improvement has been made for the treatment of breast cancers, the treatment of triple negative breast cancer (TNBC) still remains a challenge due to its aggressive characteristics and limited treatment options. Most of the studies on TNBC were conducted in Western population and TNBC is reported to be more frequent in the African women. This review encapsulates the studies conducted on TNBC patients in Asian population and elucidates the similarities and differences between these two regions...
November 10, 2017: Cancer Treatment Reviews
https://www.readbyqxmd.com/read/29153775/weekly-paclitaxel-and-carboplatin-plus-bevacizumab-as-first-line-treatment-of-metastatic-triple-negative-breast-cancer-a%C3%A2-multicenter-phase-ii-trial-by-the-hellenic-oncology-research-group
#14
Emmanouil Saloustros, Michail Nikolaou, Konstantinos Kalbakis, Aris Polyzos, Charalampos Christofillakis, Nikolaos Kentepozidis, Nikolaos Pistamaltzian, Charalampos Kourousis, Lampros Vamvakas, Vasilios Georgoulias, Dimitris Mavroudis
BACKGROUND: Triple-negative breast cancer (TNBC) lacks a standard targeted therapeutic strategy and is treated with conventional cytotoxic agents. Because of the sensitivity of TNBC to platinum compounds and the synergistic effect of bevacizumab with paclitaxel we investigated the efficacy and toxicity of weekly paclitaxel and carboplatin in combination with bevacizumab as first-line treatment in metastatic TNBC. PATIENTS AND METHODS: This phase II study followed the Simon's 2-stage optimal design...
October 24, 2017: Clinical Breast Cancer
https://www.readbyqxmd.com/read/29152453/targeting-the-stem-cell-properties-of-adult-breast-cancer-cells-using-combinatorial-strategies-to-overcome-drug-resistance
#15
Naira V Margaryan, Elisabeth A Seftor, Richard E B Seftor, Mary J C Hendrix
Purpose of review: Cancer is a major public health problem worldwide. In aggressive cancers, which are heterogeneous in nature, there exists a paucity of targetable molecules that can be used to predict outcome and response to therapy in patients, especially those in the high risk category with a propensity to relapse following chemotherapy. This review addresses the challenges pertinent to treating aggressive cancer cells with inherent stem cell properties, with a special focus on triple-negative breast cancer (TNBC)...
September 2017: Current Molecular Biology Reports
https://www.readbyqxmd.com/read/29152070/the-role-of-brca-status-on-prognosis-in-patients-with-triple-negative-breast-cancer
#16
Yuxin Xie, Qiheng Gou, Qianqian Wang, Xiaorong Zhong, Hong Zheng
Studies have showed that dysfunction in the breast cancer susceptibility gene (BRCA) is associated with triple-negative breast cancer (TNBC); however, its effect on patient survival remains controversial. We investigated the distribution of BRCA1/2 mutations in unselected Chinese patients with TNBC and explored their roles in prognosis. Then a systematic review and meta-analysis were performed to evaluate the prognostic role of BRCA dysfunction, including BRCA1/2 germline/somatic mutations, BRCA1 promoter methylation, and low BRCA1 protein expression in TNBC patients...
October 20, 2017: Oncotarget
https://www.readbyqxmd.com/read/29152062/rapamycin-sensitizes-cancer-cells-to-growth-inhibition-by-the-parp-inhibitor-olaparib
#17
Atsushi Osoegawa, Joell J Gills, Shigeru Kawabata, Phillip A Dennis
Poly (ADP-ribose) polymerase inhibitors (PARPi) have been developed and tested in a context of combining it with double-stranded (ds) DNA repair defects or inhibitors, as PARP inhibitor impairs single-stranded (ss) DNA break repair, resulting in the activation of the dsDNA break repair machinery. Rapamycin has been widely prescribed for more than a decade and recent studies have revealed that it may inhibit dsDNA break repair. The combination of the PARP inhibitor olaparib and rapamycin synergistically inhibited cell proliferation in non-small cell lung cancer (NSCLC) cells, and even in triple negative breast cancer (TNBC) cells with BRCA1 mutations...
October 20, 2017: Oncotarget
https://www.readbyqxmd.com/read/29149504/mybl1-rearrangements-and-myb-amplification-in-breast-adenoid-cystic-carcinomas-lacking-the-myb-nfib-fusion-gene
#18
Jisun Kim, Felipe C Geyer, Luciano G Martelotto, Charlotte K Y Ng, Raymond S Lim, Pier Selenica, Anqi Li, Fresia Pareja, Nicola Fusco, Marcia Edelweiss, Rahul Kumar, Rodrigo Gularte-Merida, Andre N Forbes, Ekta Khurana, Odette Mariani, Sunil Badve, Anne Vincent-Salomon, Larry Norton, Jorge S Reis-Filho, Britta Weigelt
Breast adenoid cystic carcinoma (AdCC), a rare type of triple-negative breast cancer (TNBC), has been shown to be driven by MYB pathway activation, most often underpinned by the MYB-NFIB fusion gene. Alternative genetic mechanisms, such as MYBL1 rearrangements, have been reported in MYB-NFIB-negative salivary gland AdCCs. Here we report on the molecular characterization by massively parallel sequencing of four breast AdCCs lacking the MYB-NFIB fusion gene. In two cases, we identified MYBL1 rearrangements (MYBL1-ACTN1 and MYBL1-NFIB), which were associated with MYBL1 overexpression...
November 17, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/29147445/role-of-taxanes-in-triple-negative-breast-cancer-a-study-from-tertiary-cancer-center-in-south-india
#19
K C Lakshmaiah, Abhishek Anand, K Govind Babu, Lokanatha Dasappa, Linu Abraham Jacob, Suresh Babu M C, K N Lokesh, A H Rudresha, L K Rajeev, Smitha C Saldanha, G V Giri, Deepak Koppaka
Background: Breast cancer is the most common female cancer seen globally. Triple-negative breast cancer (TNBC) is a special subtype without any obvious target and optimum treatment remains challenging. The aim was to study the clinical, pathological profile and treatment outcome of TNBC patients. Methods: This was a retrospective observational study of TNBC patients diagnosed from January 2010 to June 2012 at a tertiary cancer center in South India. Patient's clinical and pathological characteristics were studied...
August 2017: World Journal of Oncology
https://www.readbyqxmd.com/read/29146734/humanized-mice-in-studying-efficacy-and-mechanisms-of-pd-1-targeted-cancer-immunotherapy
#20
Minan Wang, Li-Chin Yao, Mingshan Cheng, Danying Cai, Jan Martinek, Chong-Xian Pan, Wei Shi, Ai-Hong Ma, Ralph W De Vere White, Susan Airhart, Edison T Liu, Jacques Banchereau, Michael A Brehm, Dale L Greiner, Leonard D Shultz, Karolina Palucka, James G Keck
Establishment of an in vivo small animal model of human tumor and human immune system interaction would enable preclinical investigations into the mechanisms underlying cancer immunotherapy. To this end, non-obese diabetic (NOD).Cg-Prkdc(scid)IL2rg(tm1Wjl) /Sz (null; NSG) mice were transplanted with human (h)CD34(+) hematopoietic progenitor and stem cells, which leads to the development of human hematopoietic and immune systems [humanized NSG (HuNSG)]. HuNSG mice received human leukocyte antigen partially matched tumor implants from patient-derived xenografts [PDX; nonsmall cell lung cancer (NSCLC), sarcoma, bladder cancer, and triple-negative breast cancer (TNBC)] or from a TNBC cell line-derived xenograft (CDX)...
November 16, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
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