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clear cell breast cancer

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https://www.readbyqxmd.com/read/28916481/identification-of-2-4-dihydroxy-5-pyrimidinyl-imidothiocarbomate-as-a-novel-inhibitor-to-y-box-binding-protein-1-yb-1-and-its-therapeutic-actions-against-breast-cancer
#1
Vinoth Prasanna Gunasekaran, Kumari Nishi, Dakshinamurthy Sivakumar, Thirunavukkarasu Sivaraman, Ganeshan Mathan
In spite of advances in breast cancer treatment and early diagnosis, drug toxicity, cancer relapse, multidrug resistance and metastasis are the major impediment to the developments of efficient drugs. However, unique druggable targets of cancer cells distinct from the normal cells provide new rationale in cancer treatment. Previous reports clearly emphasize the differential expression and localization of Y box binding protein-1 (YB-1) between normal breast tissues and different stages of breast cancer. Y box binding protein-1 is DNA as well as RNA binding protein involved in transcription and translation regulation of various proteins involved in cancer progression, apoptosis, cell cycle, epithelial to mesenchymal transition (EMT) and drug resistance...
September 12, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28912913/paraneoplastic-dermatomyositis-syndrome-presenting-as-dysphagia
#2
Emmanuel Ofori, Daryl Ramai, Mel Ona, Madhavi Reddy
Dermatomyositis (DM) is a rare autoimmune condition which predominantly affects females in the fifth and sixth decades of life. DM presents acutely or progressively as painless proximal skeletal muscle weakness and can be associated with a heliotropic rash around the eyes, and Gottron's papules on extensor surfaces of the hands. While the pathophysiology of DM is still unclear, abnormal T- and B-cell immune activity has been reported. DM has been associated with malignancy and has been shown to appear before, concurrently with, or after diagnosis of cancer...
August 2017: Gastroenterology Research
https://www.readbyqxmd.com/read/28912897/genomic-analysis-of-tumor-microenvironment-immune-types-across-14-solid-cancer-types-immunotherapeutic-implications
#3
Yu-Pei Chen, Yu Zhang, Jia-Wei Lv, Ying-Qin Li, Ya-Qin Wang, Qing-Mei He, Xiao-Jing Yang, Ying Sun, Yan-Ping Mao, Jing-Ping Yun, Na Liu, Jun Ma
We performed a comprehensive immuno-genomic analysis of tumor microenvironment immune types (TMITs), which is classified into four groups based on PD-L1+CD8A or PD-L1+cytolytic activity (CYT) expression, across a broad spectrum of solid tumors in order to help identify patients who will benefit from anti- PD-1/PD-L1 therapy. The mRNA sequencing data from The Cancer Genome Atlas (TCGA) of 14 solid cancer types representing 6,685 tumor samples was analyzed. TMIT was classified only for those tumor types that both PD-L1 and CD8A/CYT could prefict mutation and/or neoantigen number...
2017: Theranostics
https://www.readbyqxmd.com/read/28904064/structurally-novel-antiestrogens-elicit-differential-responses-from-constitutively-active-mutant-estrogen-receptors-in-breast-cancer-cells-and-tumors
#4
Benita S Katzenellenbogen, Yuechao Zhao, Mary J Laws, Valeria Sanabria Guillen, Yvonne Ziegler, Jian Min, Abhishek Sharma, Sung Hoon Kim, David Chu, Ben Ho Park, Steffi Oesterreich, Chengjian Mao, David J Shapiro, Kendall W Nettles, John A Katzenellenbogen
Many ERα-positive breast cancers develop resistance to endocrine therapy via mutation of estrogen receptors (ER) whose constitutive activation is associated with shorter patient survival. Because there is now a clinical need for new antiestrogens (AE) against these mutant ER, we describe here our development and characterization of three chemically novel AE that effectively suppress proliferation of breast cancer cells and tumors. Our AE are effective against wild type and Y537S and D538G ER, the two most commonly occurring constitutively active ER...
September 13, 2017: Cancer Research
https://www.readbyqxmd.com/read/28903409/acetyl-lupeolic-acid-inhibits-akt-signaling-and-induces-apoptosis-in-chemoresistant-prostate-cancer-cells-in-vitro-and-in-vivo
#5
Claudia Schmidt, Cornelia Loos, Lu Jin, Michael Schmiech, Christoph Q Schmidt, Menna El Gaafary, Tatiana Syrovets, Thomas Simmet
The triterpenoid acetyl-lupeolic acid (ac-LA) isolated from the oleogum resin of Boswellia carterii reduced the viability of a panel of cancer cell lines more efficiently than lupeol. There was no detectable intracellular conversion of ac-LA to lupeol and vice versa. In contrast to docetaxel, ac-LA did not induce selection of treatment-resistant cancer cells. By various parameters including DNA fragmentation, ac-LA was shown to induce apoptosis in androgen-independent PC-3 cells, whereas in MDA-MB-231 breast cancer cells, ac-LA led to cell accumulation in the G2/M phase of the cell cycle, but not to apoptosis...
August 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28887565/rapid-synthesis-and-decoration-of-reduced-graphene-oxide-with-gold-nanoparticles-by-thermostable-peptides-for-memory-device-and-photothermal-applications
#6
Sachin V Otari, Manoj Kumar, Muhammad Zahid Anwar, Nanasaheb D Thorat, Sanjay K S Patel, Dongjin Lee, Jai Hyo Lee, Jung-Kul Lee, Yun Chan Kang, Liaoyuan Zhang
This article presents novel, rapid, and environmentally benign synthesis method for one-step reduction and decoration of graphene oxide with gold nanoparticles (NAuNPs) by using thermostable antimicrobial nisin peptides to form a gold-nanoparticles-reduced graphene oxide (NAu-rGO) nanocomposite. The formed composite material was characterized by UV/Vis spectroscopy, X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, field emission scanning electron microscopy, and high-resolution transmission electron microscopy (HR-TEM)...
September 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28883606/photothermal-enhancement-of-chemotherapy-in-breast-cancer-by-visible-irradiation-of-gold-nanoparticles
#7
Rita Mendes, Pedro Pedrosa, João C Lima, Alexandra R Fernandes, Pedro V Baptista
Photothermal Therapy (PTT) impact in cancer therapy has been increasing due to the enhanced photothermal capabilities of a new generation of nanoscale photothermal agents. Among these nanoscale agents, gold nanoshells and nanorods have demonstrated optimal properties for translation of near infra-red radiation into heat at the site of interest. However, smaller spherical gold nanoparticles (AuNPs) are easier to produce, less toxic and show improved photoconversion capability that may profit from the irradiation in the visible via standard surgical green lasers...
September 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28883419/bio-fabrication-of-silver-nanoparticles-by-phycocyanin-characterization-in-vitro-anticancer-activity-against-breast-cancer-cell-line-and-in-vivo-cytotxicity
#8
Noura El-Ahmady El-Naggar, Mervat H Hussein, Asmaa Atallah El-Sawah
In recent decades, researchers were attracted towards cyanobacterial components which are potential low-cost biological reagents for silver nanoparticle biosynthesis. This article describes the biological synthesis of silver nanoparticles using a proteinaceous pigment phycocyanin extracted from Nostoc linckia as reducing agent. The synthesized silver nanoparticles have a surface plasmon resonance band centered at 425 nm. Face-centered central composite design used for optimization of silver nanoparticles (AgNPs) biosynthesis using phycocyanin...
September 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28881584/dimerization-of-egfr-and-her2-induces-breast-cancer-cell-motility-through-stat1-dependent-acta2-induction
#9
Myeongjin Jeon, Daeun You, Soo Youn Bae, Seok Won Kim, Seok Jin Nam, Hyeon Ho Kim, Sangmin Kim, Jeong Eon Lee
The dimerization of EGFR and HER2 is associated with poor prognosis such as induction of tumor growth and cell invasion compared to when EGFR remains as a homodimer. However, the mechanism for events after dimerization in breast cancer models is not clear. We found that expressions of alpha-smooth muscle actin (ACTA2) and signal transducer and activator of transcription 1 (STAT1) significantly increased with transient or stable overexpression of HER2 in EGFR-positive breast cancer cells. ACTA2 and STAT1 expression was also increased in HER2-positive breast cancer patients...
August 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/28878662/epulis-like-presentation-of-gingival-renal-cancer-metastasis
#10
Gianfilippo Nifosì, Hubert Bressand, Antonio Fabrizio Nifosì, Lorenzo Nifosì, Pierre Damseaux
Mouth metastatic cancers are very rare and they usually represent the evidence of a widespread disease. Common primary tumors are lung carcinoma in men and breast carcinoma in women, followed by kidney cancer. In the oral soft tissues, the gingiva is the most common site, suggesting a possible role of inflammation in the attraction of circulating tumor cells. Oral metastasis has a serious prognosis. In this work, we describe the case of a 58-year-old man affected by renal cancer, who was brought to our attention for the appearance of a gingival swelling...
May 2017: Case Reports in Oncology
https://www.readbyqxmd.com/read/28877888/a-novel-18-marker-panel-predicting-clinical-outcome-in-breast-cancer
#11
Jana Biermann, Szilárd Nemes, Toshima Z Parris, Hanna Engqvist, Elisabeth Werner Rönnerman, Eva Forssell-Aronsson, Gunnar Steineck, Per Karlsson, Khalil Helou
BACKGROUND: Gene expression profiling has made considerable contributions to our understanding of cancer biology and clinical care. This study describes a novel gene expression signature for breast cancer-specific survival that was validated using external datasets. METHODS: Gene expression signatures for invasive breast carcinomas (mainly Luminal B subtype) corresponding to 136 patients were analysed using Cox regression and the effect of each gene on disease-specific survival (DSS) was estimated...
September 6, 2017: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/28873415/proliferative-endocrine-effects-of-adipose-tissue-from-obese-animals-on-mcf7-cells-are-ameliorated-by-resveratrol-supplementation
#12
Christopher F Theriau, O'Llenecia S Sauvé, Marie-Soleil Beaudoin, David C Wright, Michael K Connor
Obesity is clearly associated with an increased risk of breast cancer in postmenopausal women. The purpose was to determine if obesity alters the adipocyte adipokine secretion profile, thereby altering the adipose-dependent paracrine/endocrine growth microenvironment surrounding breast cancer cells (MCF7). Additionally, we determined whether resveratrol (RSV) supplementation can counteract any obesity-dependent effects on breast cancer tumor growth microenvironment. Obese ZDF rats received standard chow diet or diet supplemented with 200 mg/kg body weight RSV...
2017: PloS One
https://www.readbyqxmd.com/read/28861553/manota-a-promising-bifunctional-chelating-agent-for-copper-64-immunopet
#13
M Moreau, S Poty, J-M Vrigneaud, P Walker, M Guillemin, O Raguin, A Oudot, C Bernhard, C Goze, F Boschetti, B Collin, F Brunotte, F Denat
Improved bifunctional chelating agents (BFC) are required for copper-64 radiolabelling of monoclonal antibodies (mAbs) under mild conditions to yield stable, target-specific imaging agents. Four different bifunctional chelating agents (BFC) were evaluated for Fab (Fragment antigen binding) conjugation and radiolabelling with copper-64. Two DOTA- (1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid) and two NOTA- (1,4,7-triazacyclononane-1,4,7-triacetic acid) derivatives bearing a p-benzyl-isothiocyanate group were conjugated to Fab-trastuzumab - which targets the HER2/neu receptor - and the average number of chelators attached ranged from 2...
September 1, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28860821/osteopontin-and-vasculogenic-mimicry-formation-are-associated-with-response-to-neoadjuvant-chemotherapy-in-advanced-breast-cancer
#14
Ming Gu, Xinyu Zheng
INTRODUCTION: Osteopontin (OPN), a multifunctional phosphoprotein, has been implicated in a series of important physiologic and pathophysiologic processes. In breast cancer, OPN functionally contributes to the tumorigenicity of spheroid-forming cells. It also plays a critical role in enhancing the proliferation, tumorigenicity, and ability to display vasculogenic mimicry (VM) of spheroid-forming cells in breast cancer. However, the role of OPN in breast cancer is not clear. PATIENTS AND METHODS: This study investigated OPN expression and VM in breast cancer patients before neoadjuvant chemotherapy (NACT)...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28856238/reovirus-fast-protein-enhances-vesicular-stomatitis-virus-oncolytic-virotherapy-in-primary-and-metastatic-tumor-models
#15
Fabrice Le Boeuf, Simon Gebremeskel, Nichole McMullen, Han He, Anna L Greenshields, David W Hoskin, John C Bell, Brent Johnston, Chungen Pan, Roy Duncan
The reovirus fusion-associated small transmembrane (FAST) proteins are the smallest known viral fusogens (∼100-150 amino acids) and efficiently induce cell-cell fusion and syncytium formation in multiple cell types. Syncytium formation enhances cell-cell virus transmission and may also induce immunogenic cell death, a form of apoptosis that stimulates immune recognition of tumor cells. These properties suggest that FAST proteins might serve to enhance oncolytic virotherapy. The oncolytic activity of recombinant VSVΔM51 (an interferon-sensitive vesicular stomatitis virus [VSV] mutant) encoding the p14 FAST protein (VSV-p14) was compared with a similar construct encoding GFP (VSV-GFP) in cell culture and syngeneic BALB/c tumor models...
September 15, 2017: Molecular Therapy Oncolytics
https://www.readbyqxmd.com/read/28840369/novel-histone-deacetylase-8-selective-inhibitor-1-3-4-oxadiazole-alanine-hybrid-induces-apoptosis-in-breast-cancer-cells
#16
Vijaya Rao Pidugu, Nagendra Sastry Yarla, Anupam Bishayee, Arunasree M Kalle, Alapati Krishna Satya
Identification of isoform-specific histone deacetylase inhibitors (HDACi) is a significant advantage to overcome the adverse side effects of pan-HDACi for the treatment of various diseases, including cancer. We have designed, and synthesized novel 1,3,4 oxadiazole with glycine/alanine hybrids as HDAC8-specific inhibitors and preliminary evaluation has indicated that 1,3,4 oxadiazole with alanine hybrid [(R)-2-amino-N-((5-phenyl-1,3,4-oxadiazol-2-yl)methyl)propanamide (10b)] to be a potent HDAC8 inhibitor. In the present study, the in vitro efficacy of the molecule in inhibiting the cancer cell proliferation and the underlying molecular mechanism was studied...
August 24, 2017: Apoptosis: An International Journal on Programmed Cell Death
https://www.readbyqxmd.com/read/28835347/cytotoxic-effect-of-sanguiin-h-6-on-mcf-7-and-mda-mb-231-human-breast-carcinoma-cells
#17
Eun-Ji Park, Dahae Lee, Seon-Eun Baek, Ki Hyun Kim, Ki Sung Kang, Tae Su Jang, Hye Lim Lee, Ji Hoon Song, Jeong-Eun Yoo
Sanguiin H-6 is a dimer of casuarictin linked by a bond between the gallic acid residue and one of the hexahydroxydiphenic acid units. It is an effective compound extracted from Rubus coreanus. It has an anticancer effect against several human cancer cells; however, its effect on breast cancer cells has not been clearly demonstrated. Thus, we aimed to investigate the anticancer effect and mechanism of action of sanguiin H-6 against two human breast carcinoma cell lines (MCF-7 and MDA-MB-231). We found that sanguiin H-6 significantly reduced cell viability in a concentration-dependent manner...
September 15, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28831388/a-new-network-based-strategy-for-predicting-the-potential-mirna-mrna-interactions-in-tumorigenesis
#18
Jiwei Xue, Fanfan Xie, Junmei Xu, Yuan Liu, Yu Liang, Zhining Wen, Menglong Li
MicroRNA (miRNA) plays an important role in the degradation and inhibition of mRNAs and is a kind of essential drug targets for cancer therapy. To facilitate the clinical cancer research, we proposed a network-based strategy to identify the cancer-related miRNAs and to predict their targeted genes based on the gene expression profiles. The strategy was validated by using the data sets of acute myeloid leukemia (AML), breast invasive carcinoma (BRCA), and kidney renal clear cell carcinoma (KIRC). The results showed that in the top 20 miRNAs ranked by their degrees, 90...
2017: International Journal of Genomics
https://www.readbyqxmd.com/read/28819251/g9a-regulates-breast-cancer-growth-by-modulating-iron-homeostasis-through-the-repression-of-ferroxidase-hephaestin
#19
Ya-Fang Wang, Jie Zhang, Yi Su, Yan-Yan Shen, Dong-Xian Jiang, Ying-Yong Hou, Mei-Yu Geng, Jian Ding, Yi Chen
G9a, a H3K9 methyltransferase, shows elevated expression in many types of human cancers, particularly breast cancer. However, the tumorigenic mechanism of G9a is still far from clear. Here we report that G9a exerts its oncogenic function in breast cancer by repressing hephaestin and destruction cellular iron homeostasis. In the case of pharmacological inhibition or short hairpin RNA interference-mediated suppression of G9a, the expression and activity of hephaestin increases, leading to the observed decrease of intracellular labile iron content and the disturbance of breast cancer cell growth in vitro and in vivo...
August 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28819183/distribution-bias-and-biochemical-characterization-of-top1mt-single-nucleotide-variants
#20
Hongliang Zhang, Yeonee Seol, Keli Agama, Keir C Neuman, Yves Pommier
Mitochondrial topoisomerase I (TOP1MT) is a type IB topoisomerase encoded in the nucleus of vertebrate cells. In contrast to the other five human topoisomerases, TOP1MT possesses two high frequency single nucleotide variants (SNVs), rs11544484 (V256I, Minor Allele Frequency = 0.27) and rs2293925 (R525W, MAF = 0.45), which tend to be mutually exclusive across different human ethnic groups and even more clearly in a cohort of 129 US patients with breast cancer and in the NCI-60 cancer cell lines. We expressed these two TOP1MT variants and the double-variant (V256I-R525W) as recombinant proteins, as well as a less common variant E168G (rs200673353, MAF = 0...
August 17, 2017: Scientific Reports
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