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https://www.readbyqxmd.com/read/28732387/the-micrornas-mir-200b-3p-and-mir-429-5p-target-the-limk1-cfl1-pathway-to-inhibit-growth-and-motility-of-breast-cancer-cells
#1
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...
July 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/28560951/mir-3188-regulates-cell-proliferation-apoptosis-and-migration-in-breast-cancer-by-targeting-tusc5-and-regulating-the-p38-mapk-signaling-pathway
#2
Xiaowen Chen, Jianli Chen
This study intended to investigate the effects of miR-3188 on breast cancer and to reveal the possible molecular mechanisms. miR-3188 was up-regulated and TUSC5 was down-regulated in breast cancer tissues and MCF-7 cells compared to normal tissue and MCF-10 cells. After MCF-7 cells were transfected with miR-3188 inhibitor, cell proliferation and migration were inhibited, while apoptosis was promoted. Luciferase reporter assay suggested that TUSC5 was a target gene of miR-3188. In addition, miR-3188 overexpression increased the p-p38 expression, while miR-3188 suppression decreased the p-p38 expression significantly...
May 26, 2017: Oncology Research
https://www.readbyqxmd.com/read/28552569/exploring-a-common-mechanism-of-alcohol-induced-deregulation-of-rna-pol-iii-genes-in-liver-and-breast-cells
#3
Yunfeng Yi, Chenghao Huang, Yanmei Zhang, Suke Tian, Junxia Lei, Songlin Chen, Ganggang Shi, Zhongdao Wu, Ningshao Xia, Shuping Zhong
Alcohol intake is associated with numbers of different human cancers, such as hepatocellular carcinoma (HCC) and breast cancer. However, the molecular mechanism remains to be elucidated. RNA polymerase III-dependent genes (Pol III genes) deregulation elevates cellular production of tRNAs and 5S rRNA, resulting in an increase in translational capacity, which promote cell transformation and tumor formation. To explore a common mechanism of alcohol-associated human cancers, we have comparably analyzed that alcohol causes deregulation of Pol III genes in liver and breast cells...
August 30, 2017: Gene
https://www.readbyqxmd.com/read/28488769/selective-expression-of-long-non-coding-rnas-in-a-breast-cancer-cell-progression-model
#4
Kirsten M Tracy, Coralee E Tye, Natalie A Page, Andrew J Fritz, Janet L Stein, Jane B Lian, Gary S Stein
Long non-coding RNAs (lncRNAs) are acknowledged as regulators of cancer biology and pathology. Our goal was to perform a stringent profiling of breast cancer cell lines that represent disease progression. We used the MCF-10 series, which includes the normal-like MCF-10A, HRAS-transformed MCF-10AT1 (pre-malignant), and MCF-10CA1a (malignant) cells, to perform transcriptome wide sequencing. From these data, we have identified 346 lncRNAs with dysregulated expression across the progression series. By comparing lncRNAs from these datasets to those from an additional set of cell lines that represent different disease stages and subtypes, MCF-7 (early stage, luminal), and MDA-MB-231 (late stage, basal), 61 lncRNAs that are associated with breast cancer progression were identified...
May 10, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28475000/effect-of-nima-related-kinase-2b-on-the-sensitivity-of-breast-cancer-to-paclitaxel-in-vitro-and-vivo
#5
Yahong Wang, Honghong Shen, Quangui Yin, Tongxian Zhang, Ziyu Liu, Wei Zhang, Yun Niu
NIMA-related kinase 2B has been known to be an important centrosome regulatory factor. The aim of this study was to investigate the effect of NIMA-related kinase 2B on the sensitivity of breast cancer to paclitaxel. We detected the expression of NIMA-related kinase 2B messenger RNA in MCF-10 cells, including MCF-10A, MCF-10AT, MCF-10DCIS.com , and MCF-10CA1a. The influence of NIMA-related kinase 2B in nude mouse was also detected. The association between NIMA-related kinase 2B and clinicopathological factors was explored in invasive ductal carcinoma tissues...
May 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28057503/evaluation-of-cancer-cell-deformability-by-microcavity-array
#6
Tomoko Yoshino, Tsuyoshi Tanaka, Seita Nakamura, Ryo Negishi, Nozomi Shionoiri, Masahito Hosokawa, Tadashi Matsunaga
A cell entrapment device consisting of a microcavity array was used to analyze the deformability of MCF-10 human breast epithelial and MCF-7 human breast cancer cell lines by confocal laser scanning microscopy. Entrapment of up to 8 × 10(3) cells was achieved within 3 min. Protrusions were formed at the bottom surface of the array with a pore size of 3 μm. Protrusion length increased at higher filtration pressures and could be used to distinguish between MCF-7 and MCF-10 cells. These results indicate that our system is useful for high-throughput deformability analysis of cancer cells, which can provide insight into the mechanisms underlying tumor cell malignancy...
March 1, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/27783265/a-parallel-and-quantitative-cell-migration-assay-using-a-novel-multi-well-based-device
#7
Qianghua Quan, Shuwen Zhang, Xudong Wang, Qi Ouyang, Yugang Wang, Gen Yang, Chunxiong Luo
Cell migration assays for different chemical environments are important for both scientists and clinicians searching for new therapeutics. In this study, we developed a multi-well-based microfluidic chip that has multiple units for different conditions. In each unit, cells can be patterned and then released to observe their migration. Automatic image analysis and model-based data processing were developed to describe the integrated cell migration assay precisely and quickly. As a demonstration, the migration behaviors of two types of cells in eight chemical conditions were studied...
December 2016: Biomedical Microdevices
https://www.readbyqxmd.com/read/27601420/exposure-to-cyclic-volatile-methylsiloxanes-cvms-causes-anchorage-independent-growth-and-reduction-of-brca1-in-non-transformed-human-breast-epithelial-cells
#8
Abdullah Farasani, Philippa D Darbre
Dermal absorption of components of personal care products (PCPs) may contribute to breast cancer development. Cyclic volatile methylsiloxanes (cVMS) are used widely in the formulation of PCPs, and their presence has been recently detected in human blood. The objectives of this study were to investigate any genotoxic effects after short- (1 week) or longer-term (30 weeks) exposure to hexamethylcyclotrisiloxane (D3), octamethylcyclotetrasiloxane (D4) or decamethylcyclopentasiloxane (D5) in MCF-10 A and MCF-10F immortalized non-transformed human breast epithelial cells...
September 7, 2016: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/27080175/one-pot-synthesis-of-1-4-dihydroxy-2-e-1-hydroxy-4-phenylbut-3-enyl-anthracene-9-10-diones-as-novel-shikonin-analogs-and-evaluation-of-their-antiproliferative-activities
#9
Li-Ming Zhao, Feng-Xia Cao, Hai-Shan Jin, Jie-Huan Zhang, Jeffrey Szwaya, Guangdi Wang
A series of shikonin analogs have been synthesized in a one-pot reaction of quinizarin with β,γ-unsaturated aldehydes in MeOH under mild conditions and investigated for their cytotoxicity against four cancer cell lines and one normal cell line. The synthesized compounds were found to be cytotoxic against HeLa cells with no apparent toxicity against normal cell line. Further modification led to the discovery of a novel tetracyclic anthraquinone (4b/4b') with potent cytotoxic activities against cervical, breast and pancreatic cancer cell lines with no significant effect on the growth of the control mammary epithelial cell line MCF-10...
June 1, 2016: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/27002393/-hinokinin-induces-g2-m-arrest-and-contributes-to-the-antiproliferative-effects-of-doxorubicin-in-breast-cancer-cells
#10
Nayanne Larissa Cunha, Gabriella Machado Teixeira, Thomás Duzzi Martins, Anderson Roberto Souza, Pollyana Francieli Oliveira, Guilherme Venâncio Símaro, Karen Cristina Souza Rezende, Natália Dos Santos Gonçalves, Daniel Gottardo Souza, Denise Crispim Tavares, Marcio Luís Andrade Silva, Raquel Alves Dos Santos
Breast cancer incidence rises worldwide and new chemotherapeutical strategies have been investigated to overcome chemoresistance. (-)-Hinokinin is a dibenzylbutyrolactone lignan derived from the partial synthesis of (-)-cubebin extracted from Piper cubeba seeds. Biological effects of dibenzylbutyrolactone lignans include antiviral, antitumor, anti-inflammatory, and trypanocidal activities. In the present study, we evaluated the ability of (-)-hinokinin to modulate the antiproliferative effects of doxorubicin intumoral (MCF-7 and SKBR-3) and normal (MCF-10 A) breast cell lines...
April 2016: Planta Medica
https://www.readbyqxmd.com/read/26858524/folic-acid-targeted-mn-zns-quantum-dots-for-theranostic-applications-of-cancer-cell-imaging-and-therapy
#11
Ibrahim Birma Bwatanglang, Faruq Mohammad, Nor Azah Yusof, Jaafar Abdullah, Mohd Zobir Hussein, Noorjahan Banu Alitheen, Nadiah Abu
In this study, we synthesized a multifunctional nanoparticulate system with specific targeting, imaging, and drug delivering functionalities by following a three-step protocol that operates at room temperature and solely in aqueous media. The synthesis involves the encapsulation of luminescent Mn:ZnS quantum dots (QDs) with chitosan not only as a stabilizer in biological environment, but also to further provide active binding sites for the conjugation of other biomolecules. Folic acid was incorporated as targeting agent for the specific targeting of the nanocarrier toward the cells overexpressing folate receptors...
2016: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/26385534/a-comparison-of-non-biologically-active-truncated-egf-egft-and-full-length-hegf-for-delivery-of-auger-electron-emitting-111in-to-egfr-positive-breast-cancer-cells-and-tumor-xenografts-in-athymic-mice
#12
Clara Panosa, Humphrey Fonge, Montserrat Ferrer-Batallé, Javier A Menéndez, Anna Massaguer, Rafael De Llorens, Raymond M Reilly
INTRODUCTION: EGFt is a truncated form of human epidermal growth factor (hEGF) that is non-biologically active but retains binding and internalization into EGFR-positive cells. Our aim was to compare EGFt and hEGF for delivery of (111)In to human breast cancer (BC) cells and tumors and evaluate its cytotoxicity against EGFR-positive BC cells, mediated by the Auger electron emissions of (111)In. METHODS: The binding, internalization and nuclear localization of EGFt and hEGF in MDA-MB-468 human BC cells were first assessed by confocal fluorescence microscopy...
December 2015: Nuclear Medicine and Biology
https://www.readbyqxmd.com/read/26384954/quantum-dot-nanoprobe-based-high-content-monitoring-of-notch-pathway-inhibition-of-breast-cancer-stem-cell-by-capsaicin
#13
Yumi Shim, Joon Myong Song
Breast cancer is the major cause of cancer death for women worldwide. Breast cancer patients are treated with chemotherapy and radiotherapy. Although chemotherapy and radiotherapy are applied, some cancer cells still survive. These cells, called cancer stem cell (CSC), exhibit special capabilities, such as drug and radio resistance. The remaining CSC can trigger cancer recurrence. Thus, it is critical to find an effective way to target CSC. Capsaicin has been reported to affect anticancer activity in many cancers...
December 2015: Molecular and Cellular Probes
https://www.readbyqxmd.com/read/26375063/hem-1-functional-capacity-of-reconstituted-blood-in-1-1-1-versus-3-1-1-ratios-a-thrombelastometry-study
#14
A Driessen, N Schäfer, U Bauerfeind, M Fröhlich, E Stürmer, B Bouillon, M Maegele
INTRODUCTION: Different transfusion ratio concepts of red blood cells (pRBCs), fresh frozen plasma (FFPs) and platelets (PLTs) have been implemented in trauma care, but the optimal ratios are still discussed. In this study the hemostatic potential of two predefined ratios was assessed by using an in vitro thrombelastometric approach. Furthermore, age effects of reconstituted blood were analyzed. METHODS: Whole blood (WB) of voluntary donors was separated into packed red blood cells (pRBCs), fresh frozen plasma (FFP) and platelets (PLTs) and reconstituted into the ratios 1:1:1 and 3:1:1 at day 1, 4, 14, and 24...
October 2015: Shock
https://www.readbyqxmd.com/read/26373394/expeditious-entry-to-functionalized-pseudo-peptidic-organoselenide-redox-modulators-via-sequential-ugi-sn-methodology
#15
Saad Shaaban, Amr Negm, Mohamed A Sobh, Ludger A Wessjohann
An efficient route towards the synthesis of symmetrical diselenide and seleniumcontaining quinone pseudopeptides via one-pot Ugi and sequential nucleophilic substitution (SN) methodology was developed. Compounds were evaluated for their antimicrobial and anticancer activities and their corresponding antioxidant/pro-oxidant profiles were assesed employing 2,2-diphenyl-1-picrylhydrazyl (DPPH), bleomycin dependent DNA damage and glutathione peroxidase (GPx)-like activity assays. Selenium based quinones were among the most potent cytotoxic compounds with a slight preference for MCF-7 compared to HepG2 cells and good free radical scavenging activity...
2016: Anti-cancer Agents in Medicinal Chemistry
https://www.readbyqxmd.com/read/26373041/microencapsulated-multicellular-tumor-spheroids-as-a-tool-to-test-novel-anticancer-nanosized-drug-delivery-systems-in-vitro
#16
Anna M Privalova, Svetlana V Uglanova, Natalia R Kuznetsova, Natalia L Klyachko, Yury I Golovin, Viktor V Korenkov, Elena L Vodovozova, Elena A Markvicheva
In the study, MCF-7 human breast adenocarcinoma cells were used to study cytotoxicity of novel anticancer nanosized formulations, such as docetaxel-loaded nanoemulsion and liposomal formulation of a lipophilic methotrexate (MTX) prodrug. In vitro study of cytotoxicity was carried out in 2 models, namely using 3D in vitro model based on multicellular tumor spheroids (MTS) and 2D monolayer culture. MTS were generated by tumor cell cultivation within alginate-oligochitosan microcapsules. In the case of the monolayer culture, cell viability was found to be 25, 18 and 12% for the samples containing nanoemulsion at concentrations 20, 300 and 1000 nM of docetaxel, respectively, after 48 hs incubation...
July 2015: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/26372775/sulforaphane-alone-and-in-combination-with-clofarabine-epigenetically-regulates-the-expression-of-dna-methylation-silenced-tumour-suppressor-genes-in-human-breast-cancer-cells
#17
Katarzyna Lubecka-Pietruszewska, Agnieszka Kaufman-Szymczyk, Barbara Stefanska, Barbara Cebula-Obrzut, Piotr Smolewski, Krystyna Fabianowska-Majewska
BACKGROUND/AIM: Sporadic breast cancer is frequently associated with aberrant DNA methylation patterns that are reversible and responsive to environmental factors, including diet. In the present study, we investigated the effects of sulforaphane (SFN), a phytochemical from cruciferous vegetables, on the methylation and expression of PTEN and RARbeta2 tumour suppressor genes as well as on the expression of regulators of DNA methylation reaction, DNMT1 , p53 , and p21 , in MCF-7 and MDA-MB-231 human breast cancer cells with different invasive potential...
2015: Journal of Nutrigenetics and Nutrigenomics
https://www.readbyqxmd.com/read/26372255/effect-of-autoclave-sterilization-on-the-cyclic-fatigue-resistance-of-thermally-treated-nickel-titanium-instruments
#18
D Zhao, Y Shen, B Peng, M Haapasalo
AIM: To compare the cyclic fatigue resistance of HyFlex CM, Twisted Files (TF), K3XF, Race, and K3, and evaluate the effect of autoclave sterilization on the cyclic fatigue resistance of these instruments both before and after the files were cycled. METHODOLOGY: Five types of NiTi instruments with similar size 30, .06 taper were selected: HyFlex CM, TF, K3XF, Race and K3. Files were tested in a simulated canal with a curvature of 60° and a radius of 3 mm. The number of cycles to failure of each instrument was determined to evaluate cyclic fatigue resistance...
October 2016: International Endodontic Journal
https://www.readbyqxmd.com/read/26365320/effect-of-aluminium-on-migration-of-oestrogen-unresponsive-mda-mb-231-human-breast-cancer-cells-in-culture
#19
Ayse Bakir, Philippa D Darbre
Aluminium (Al) has been measured in human breast tissue, and may be a contributory factor in breast cancer development. At the 10th Keele meeting, we reported that long-term exposure to Al could increase migratory properties of oestrogen-responsive MCF-7 human breast cancer cells suggesting a role for Al in the metastatic process. We now report that long-term exposure (20-25 weeks) to Al chloride or Al chlorohydrate at 10(-4) M or 10(-5) M concentrations can also increase the migration of oestrogen unresponsive MDA-MB-231 human breast cancer cells as measured using time-lapse microscopy and xCELLigence technology...
November 2015: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/26363202/low-doses-of-bisphenol-a-stimulate-the-proliferation-of-breast-cancer-cells-via-erk1-2-err%C3%AE-signals
#20
Haixing Song, Tao Zhang, Ping Yang, Minhui Li, Yuhan Yang, Yuanyuan Wang, Jun Du, Kejian Pan, Kun Zhang
The effects and mechanisms of bisphenol A (BPA) on the development of breast cancer are still not well illustrated. The present study revealed that nanomolar BPA significantly promoted the proliferation of both estrogen receptor (ER) positive (MCF-7) and negative (SkBr3) breast cancer cells, which was confirmed by up regulation of proliferating cell nuclear antigen (PCNA) and Bcl-2. Neither ERα nor G-protein-coupled estrogen receptor (GPER) mediated this effect of BPA because their inhibitors had no effect on the BPA induced cell proliferation...
December 25, 2015: Toxicology in Vitro: An International Journal Published in Association with BIBRA
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