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https://www.readbyqxmd.com/read/28734999/the-reversion-of-anti-cancer-drug-antagonism-of-tamoxifen-and-docetaxel-by-the-hyaluronic-acid-decorated-polymeric-nanoparticles
#1
Zhihong Zhu, Yuenan Li, Xinggang Yang, Hao Pan, Weisan Pan
Docetaxel (DTX) and tamoxifen (TMX) are first-line drugs used to treat breast cancer. However when used in combination, they produce antagonism because of their differential metabolic pathways. In order to prevent this antagonism, an amphiphilic copolymer, cholesterol modified hyaruronic acid (HA-CHOL), was synthesized for investigating the co-delivery of TMX and DTX. In vitro drug release experiment of the Co-encapsulated (encapsulated DTX+TMX) nanoparticles (Co-NPs) revealed that NPs with unique release mechanism can markedly reduce the release of these drugs in the circulatory system...
July 19, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28734865/single-factors-alone-can-induce-mesenchymal-like-morphology-but-not-promote-full-emt-in-breast-cancer-cell-lines-with-different-hormone-statuses
#2
Maria K Tveitarås, Inga Reigstad, Lina Leiss, Rolf K Reed, Linda Stuhr
BACKGROUND: Epithelial to mesenchymal transition (EMT) is considered to be important for cancer invasion and metastasis. Tumour hypoxia, in addition to Transforming Growth Factor-β (TGF-β) and Notch, amongst others, have been suggested to be involved in EMT. We therefore investigated if hypoxia, TGF-β1 and the Notch ligand Jagged-1 alone induced morphological changes with corresponding EMT signatures in different epithelial breast cancer cell lines in vitro. Furthermore, we also studied whether or not TGF-β1, or Jagged-1 in combination with hypoxia added any effect on EMT...
July 19, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28734156/a-novel-hypoxia-response-element-regulates-oxygen-related-repression-of-tissue-factor-pathway-inhibitor-in-the-breast-cancer-cell-line-mcf-7
#3
Xue Yan Cui, Grethe Skretting, Mari Tinholt, Benedicte Stavik, Anders Erik Astrup Dahm, Kristine Kleivi Sahlberg, Sandip Kanse, Nina Iversen, Per Morten Sandset
BACKGROUND: Hypoxia is one of the most pervasive physiological stresses in solid tumors. We have previously demonstrated that tissue factor (TF) pathway inhibitor (TFPI) expression was transcriptionally repressed by the activation of hypoxia inducible factor (HIF)-1α under hypoxic conditions. However, the role of HIF-2α, also known as endothelial PAS domain-containing protein 1 (EPAS1), on TFPI expression remains unclear. AIM: To explore the role of HIF-2α/EPAS1 in the regulation of TFPI expression under hypoxia in breast cancer cells...
July 14, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28733879/anticancer-activity-of-salicin-and-fenofibrate
#4
Marwa Sabaa, Hassan M ELFayoumi, Shimaa Elshazly, Mahmoud Youns, Waleed Barakat
Cancer refers to a disorder of cell proliferation that leads to tumor production. Cancer is usually treated by surgery, chemotherapeutic drugs, and radiation. Despite the presence of many anticancer drugs, cancer is still an uncontrolled disease and is a major cause of death worldwide. In addition, most anticancer drugs have severe side effects that can limit their use in some patients. This study aims to investigate the possible anticancer activity of two clinically used drugs: a natural antioxidant agent (salicin) and an antihyperlipidemic agent (fenofibrate) against two breast cancer models (in vivo EAC and in vitro MCF7) and the pancreatic cancer cell line (Panc-1)...
July 21, 2017: Naunyn-Schmiedeberg's Archives of Pharmacology
https://www.readbyqxmd.com/read/28733703/induction-of-accelerated-senescence-by-the-microtubule-stabilizing-agent-peloruside-a
#5
Ariane Chan, Connie Gilfillan, Nikki Templeton, Ian Paterson, Peter T Northcote, John H Miller
Chemotherapeutic agents can induce accelerated senescence in tumor cells, an irreversible state of cell cycle arrest. Paclitaxel, a microtubule-stabilizing agent used to treat solid tumors of the breast, ovary, and lung and discodermolide, another stabilizing agent from a marine sponge, induce senescence in cultured cancer cells. The aim of this study was to determine if the microtubule-stabilizing agent peloruside A, a polyketide natural product from a marine sponge, can induce accelerated senescence in a breast cancer cell line MCF7...
July 22, 2017: Investigational New Drugs
https://www.readbyqxmd.com/read/28730725/targeting-nano-drug-delivery-to-cancer-cells-using-tunable-multi-layer-silver-decorated-gold-nanorods
#6
Zeid A Nima, Ahmed M Alwbari, Vijayalakshmi Dantuluri, Rabab N Hamzah, Natasha Sra, Pooja Motwani, Konstantinos Arnaoutakis, Rebecca A Levy, Amani F Bohliqa, Dmitry Nedosekin, Vladimir P Zharov, Issam Makhoul, Alexandru S Biris
Multifunctional nanoparticles have high potential as targeting delivery vehicles for cancer chemotherapy. In this study, silver-decorated gold nanorods (AuNR\Ag) have been successfully used to deliver specific, targeted chemotherapy against breast cancer (MCF7) and prostate carcinoma (PC3) cell lines. Doxorubicin, a commonly used chemotherapy, and anti-Epithelial cell adhesion molecule (anti-EpCAM) antibodies were covalently bonded to thiolated polyethylene glycol-coated AuNR\Ag, and the resultant system was used to deliver the drugs to cancer cells in vitro...
July 21, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28729623/3d-qsar-studies-on-maslinic-acid-analogs-for-anticancer-activity-against-breast-cancer-cell-line-mcf-7
#7
Sarfaraz Alam, Feroz Khan
Global prevalence of breast cancer and its rising frequency makes it a key area of research in drug discovery programs. The research article describes the development of field based 3D-QSAR model based on human breast cancer cell line MCF7 in vitro anticancer activity, which defines the molecular level understanding and regions of structure-activity relationship for triterpene maslinic acid and its analogs. The key features such as average shape, hydrophobic regions and electrostatic patterns of active compounds were mined and mapped to virtually screen potential analogs...
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28724328/smart-tetrazole-based-antibacterial-nanoparticles-as-multifunctional-drug-carriers-for-cancer-combination-therapy
#8
Elham Zakerzadeh, Roya Salehi, Mehrdad Mahkam
Due to multidrug resistance of cancer tissues and immune-suppression of cancerous patients during chemotherapy in one hand and the use of tetrazole derivatives in medicine because of its anticancer, antifungal and antiviral properties, on the other, we were encouraged to design novel smart antibacterial nanocomposites-based polymer of tetrazole as dual anticancer drug delivery systems. The structures of nanocomposites characterized by FTIR, (1)H NMR, FESEM-EDX and TGA analyses and antibacterial activity of smart carriers were evaluated by determination of minimum inhibitory concentration (MIC) values against some bacteria and fungi...
July 20, 2017: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/28708596/hdac6-inhibitor-wt161-downregulates-growth-factor-receptors-in-breast-cancer
#9
Teru Hideshima, Ralph Mazitschek, Jun Qi, Naoya Mimura, Jen-Chieh Tseng, Andrew L Kung, James E Bradner, Kenneth C Anderson
We have shown that WT-161, a histone deacetylase 6 (HDAC6) inhibitor, shows remarkable anti-tumor activity in multiple myeloma (MM) in preclinical models. However, its activity in other type of cancers has not yet been shown. In this study, we further evaluated the biologic sequelae of WT161 in breast cancer cell lines. WT161 triggers apoptotic cell death in MCF7, T47D, BT474, and MDA-MB231 cells, associated with decreased expression of EGFR, HER2, and ERα and downstream signaling. However, HDAC6 knockdown shows that cytotoxicity and destabilization of these receptors triggered by WT161 are not dependent on HDAC6 inhibition...
July 5, 2017: Oncotarget
https://www.readbyqxmd.com/read/28702618/copper-ii-complexes-of-functionalized-2-2-6-2-terpyridines-and-2-6-di-thiazol-2-yl-pyridine-structure-spectroscopy-cytotoxicity-and-catalytic-activity
#10
Katarzyna Czerwińska, Barbara Machura, Slawomir Kula, Stanisław Krompiec, Karol Erfurt, Catarina Roma-Rodrigues, Alexandra R Fernandes, Lidia S Shul'pina, Nikolay S Ikonnikov, Georgiy B Shul'pin
Six new copper(ii) complexes with 2,2':6',2''-terpyridine (4'-R(n)-terpy) [1 (R(1) = furan-2-yl), 2 (R(2) = thiophen-2-yl), and 3 (R(3) = 1-methyl-1H-pyrrol-2-yl)] and 2,6-di(thiazol-2-yl)pyridine derivatives (R(n)-dtpy) [4 (R(1)), 5 (R(2)), and 6 (R(3))] have been synthesized by a reaction between copper(ii) chloride and the corresponding ligand. The complexes have been characterized by UV-vis and IR spectroscopy, and their structures have been determined by X-ray analysis. The antiproliferative potential of copper(ii) complexes of 2,2':6',2''-terpyridine and 2,6-di(thiazol-2-yl)pyridine derivatives towards human colorectal (HCT116) and ovarian (A2780) carcinoma as well as towards lung (A549) and breast adenocarcinoma (MCF7) cell lines was examined...
July 13, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28696678/benchmarking-water-quality-from-wastewater-to-drinking-waters-using-reduced-transcriptome-of-human-cells
#11
Pu Xia, Xiaowei Zhang, Hanxin Zhang, Pingping Wang, Mingming Tian, Hongxia Yu
One of the major challenge in environmental science is how to monitor and assess the risk of complex environmental mixtures. In vitro bioassays with limited key toxicological endpoints have been shown to be suitable to evaluate mixtures of organic pollutants in wastewater and recycled water. Omics approaches such as transcriptomics can monitor biological effects at genome-scale. However, few studies have applied omics approach in the assessment of mixtures of organic micropollutants. Here, an omics approach was developed for profiling bioactivity of ten water samples ranging from wastewater to drinking water in human cells by a reduced human transcriptome (RHT) method and dose response modeling...
July 11, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28695656/anatolian-honey-is-not-only-sweet-but-can-also-protect-from-breast-cancer-elixir-for-women-from-artemis-to-present
#12
Mehmet Fatih Seyhan, Eren Yılmaz, Özlem Timirci-Kahraman, Neslihan Saygılı, Halil İbrahim Kısakesen, Allison Pınar Eronat, Ayşe Begüm Ceviz, Sema Bilgiç Gazioğlu, Hülya Yılmaz-Aydoğan, Oğuz Öztürk
Natural products with bioactive components are widely studied on various cancer cell lines for their possible cytotoxic effects, recently. Among these products, honey stands out as a valuable bee product containing many active phenolic compounds and flavonoids. Numerous types of multifloral honey and honeydew honey are produced in Turkey owing to its abundant vegetation. Therefore, in this study, we investigated the cytotoxic effects of particular tree-originated honeys from chestnut, cedar, pine, and multifloral honey on cell lines representing different types of the most common cancer of women, breast cancer, MCF7, SKBR3, and MDAMB-231, and fibrocystic breast epithelial cell line, MCF10A as a control...
July 10, 2017: IUBMB Life
https://www.readbyqxmd.com/read/28694822/chemical-composition-and-cytotoxic-and-antibacterial-activities-of-the-essential-oil-of-aloysia-citriodora-palau-grown-in-morocco
#13
Moulay Ali Oukerrou, Mounir Tilaoui, Hassan Ait Mouse, Inass Leouifoudi, Abdeslam Jaafari, Abdelmajid Zyad
The aim of this work is to investigate the in vitro cytotoxic and antibacterial effects of the essential oils of Aloysia citriodora Palau, harvested in different regions of Morocco. The chemical profile was established using gas chromatography-mass spectrometry analysis. The cytotoxic activity against P815, MCF7, and VERO cell lines as well as the normal human peripheral blood mononuclear cells (PBMCs) was evaluated using the MTT assay. Standard, ATCC, strains of bacteria (Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa) were cultivated in Muller Hinton media...
2017: Advances in Pharmacological Sciences
https://www.readbyqxmd.com/read/28694686/molecular-docking-qsar-and-admet-studies-of-withanolide-analogs-against-breast-cancer
#14
Dharmendra K Yadav, Surendra Kumar, Saloni, Harpreet Singh, Mi-Hyun Kim, Praveen Sharma, Sanjeev Misra, Feroz Khan
Withanolides are a group of pharmacologically active compounds present in most prodigal amounts in roots and leaves of Withania somnifera (Indian ginseng), one of the most important medicinal plants of Indian traditional practice of medicine. Withanolides are steroidal lactones (highly oxygenated C-28 phytochemicals) and have been reported to exhibit immunomodulatory, anticancer and other activities. In the present study, a quantitative structure activity relationship (QSAR) model was developed by a forward stepwise multiple linear regression method to predict the activity of withanolide analogs against human breast cancer...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28684684/impact-of-premature-senescence-on-radiosensitivity-measured-by-high-throughput-cell-based-assays
#15
Razmik Mirzayans, Bonnie Andrais, David Murray
In most p53 wild-type human cell types, radiosensitivity evaluated by the colony formation assay predominantly reflects stress-induced premature senescence (SIPS) and not cell death (Int. J. Mol. Sci. 2017, 18, 928). SIPS is a growth-arrested state in which the cells acquire flattened and enlarged morphology, remain viable, secrete growth-promoting factors, and can give rise to tumor-repopulating progeny. The impact of SIPS on radiosensitivity measured by short-term assays remains largely unknown. We report that in four p53 wild-type human solid tumor-derived cell lines (HCT116, SKNSH, MCF7 and A172): (i) the conventional short-term growth inhibition assay (3 days post-irradiation) generates radiosensitivity data comparable to that measured by the laborious and time-consuming colony formation assay; (ii) radiation dose-response curves obtained by multiwell plate colorimetric/fluorimetric assays are markedly skewed towards radioresistance, presumably reflecting the emergence of highly enlarged, growth-arrested and viable cells; and (iii) radiation exposure (e...
July 6, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28683649/in-vitro-and-in-vivo-delivery-of-artemisinin-loaded-pcl-peg-pcl-micelles-and-its-pharmacokinetic-study
#16
Hamidreza Kheiri Manjili, Hojjat Malvandi, Mir Sajjad Mousavi, Elahe Attari, Hossein Danafar
Artemisinin (ART) is a natural anti-malarial sesquiterpene lactone with anticancer properties, but its application is limited because of its low water solubility. To increase the bioavailability and water solubility of ART, we synthesized three series of poly (ɛ-caprolactone)-poly (ethylene glycol)-poly (ɛ-caprolactone) (PCL-PEG-PCL) tri-block copolymers. The structure of the copolymers was characterized by HNMR, FTIR, DSC and GPC techniques. ART was encapsulated inside micelles by a nanoprecipitation method which leading to the formation of ART/PCL-PEG-PCL micelles...
July 7, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28681503/gene-cloning-characterization-and-cytotoxic-activity-of-methionine-%C3%AE-lyase-from-clostridium-novyi
#17
Vitalia V Kulikova, Elena A Morozova, Svetlana V Revtovich, Mikhail I Kotlov, Natalya V Anufrieva, Natalya P Bazhulina, Samanta Raboni, Serena Faggiano, Edi Gabellieri, Patrizia Cioni, Yury F Belyi, Andrea Mozzarelli, Tatyana V Demidkina
The exploitation of methionine-depleting enzyme methionine γ-lyase (MGL) is a promising strategy against specific cancer cells that are strongly dependent on methionine. To identify MGL from different sources with high catalytic activity and efficient anticancer action, we have expressed and characterized MGL from Clostridium novyi and compared its catalytic efficiency with the previously studied MGL from Citrobacter freundii. The purified recombinant MGL exhibits kcat and kcat /Km for methionine γ-elimination reaction that are 2...
July 6, 2017: IUBMB Life
https://www.readbyqxmd.com/read/28681330/antiproliferative-activity-and-vegf-expression-reduction-in-mcf7-and-pc-3-cancer-cells-by-paclitaxel-and-imatinib-co-encapsulation-in-folate-targeted-liposomes
#18
Marco Júnio Peres-Filho, Alexandre Pereira Dos Santos, Thais Leite Nascimento, Renato Ivan de Ávila, Fabrícia Saba Ferreira, Marize Campos Valadares, Eliana Martins Lima
Co-encapsulation of anticancer drugs paclitaxel and imatinib in nanocarriers is a promising strategy to optimize cancer treatment. Aiming to combine the cytotoxic and antiangiogenic properties of the drugs, a liposome formulation targeted to folate receptor co-encapsulating paclitaxel and imatinib was designed in this work. An efficient method was optimized for the synthesis of the lipid anchor DSPE-PEG(2000)-folic acid (FA). The structure of the obtained product was confirmed by RMN, FT-IR, and ESI-MS techniques...
July 5, 2017: AAPS PharmSciTech
https://www.readbyqxmd.com/read/28677794/prmt2%C3%AE-a-c-terminal-splice-variant-of-prmt2-inhibits-the-growth-of-breast-cancer-cells
#19
Jing Zhong, Ya-Jun Chen, Ling Chen, Ying-Ying Shen, Qing-Hai Zhang, Jing Yang, Ren-Xian Cao, Xu-Yu Zu, Ge-Bo Wen
Our previous study reported several alternative splicing variants of arginine N-methyltransferase 2 (PRMT2), which lose different exons in the C-terminals of the wild-type PRMT2 gene. Particularly, due to frame-shifting, PRMT2β encodes a novel amino acid sequence at the C-terminus of the protein, the function of which is not understood. In the present study, we determined the role of PRMT2β in breast cancer cell proliferation, apoptosis and its effect on the Akt signaling pathway. Stable breast cancer MCF7 cell line with lentivirus-mediated PRMT2β overexpression was obtained after selection by puromycin for 2 weeks...
July 3, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28677036/%C3%AE-np73-regulates-the-expression-of-the-multidrug-resistance-genes-abcb1-and-abcb5-in-breast-cancer-and-melanoma-cells-a-short-report
#20
Habib A M Sakil, Marina Stantic, Johanna Wolfsberger, Suzanne Egyhazi Brage, Johan Hansson, Margareta T Wilhelm
PURPOSE: Multidrug resistance (MDR) is a major cause of treatment failure. In cancer cells, MDR is often caused by an increased efflux of therapeutic drugs mediated by an up-regulation of ATP binding cassette (ABC) transporters. It has previously been shown that oncogenic ΔNp73 plays an important role in chemo-resistance. Here we aimed at unraveling the role of ΔNp73 in regulating multidrug resistance in breast cancer and melanoma cells. METHODS: KEGG pathway analysis was used to identify pathways enriched in breast cancer samples with a high ΔNp73 expression...
July 4, 2017: Cellular Oncology (Dordrecht)
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