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https://www.readbyqxmd.com/read/28226310/adhesion-of-ligand-conjugated-biosynthesized-magnetite-nanoparticles-to-triple-negative-breast-cancer-cells
#1
John D Obayemi, Jingjie Hu, Vanessa O Uzonwanne, Olushola S Odusanya, Karen Malatesta, Nicolas Anuku, Winston O Soboyejo
This paper presents the results of an experimental study of the adhesion forces between components of model conjugated magnetite nanoparticle systems for improved selectivity in the specific targeting of triple negative breast cancer. Adhesion forces between chemically synthesized magnetite nanoparticles (CMNPs), biosynthesized magnetite nanoparticles (BMNPs), as well as their conjugated systems and triple negative breast cancer cells (MDA-MB-231) or normal breast cells (MCF 10A) are elucidated at a nanoscale...
February 6, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28225252/luminescent-re-i-carbonyl-complexes-as-trackable-photocorms-for-co-delivery-to-cellular-targets
#2
Indranil Chakraborty, Jorge Jimenez, W M C Sameera, Masako Kato, Pradip K Mascharak
A family of Re(I) carbonyl complexes of general formula [ReX(CO)3(phen)](0/1+) (where X = Cl(-), CF3SO3(-), MeCN, PPh3, and methylimidazole) derived from 1,10-phenanthroline (phen) exhibits variable emission characteristics depending on the presence of the sixth ancillary ligand/group (X). All complexes but with X = MeCN exhibit moderate CO release upon irradiation with low-power UV light and are indefinitely stable in anaerobic/aerobic environment in solution as well as in solid state when kept under dark condition...
February 22, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28224267/selection-of-dna-aptamers-for-extra-cellular-domain-of-human-epidermal-growth-factor-receptor-2-to-detect-her2-positive-carcinomas
#3
A Sett, B B Borthakur, U Bora
BACKGROUND: Human epidermal growth factor receptor 2 (Her2, an orphan receptor of ErbB family) is considered as an important biomarker as it plays a key role in the development and progression of aggressive types of breast, ovarian, stomach and gastric cancer. In the present study, we developed novel DNA aptamers against the extra-cellular domain (ECD) of Her2 protein for detection of Her2-positive carcinomas. METHODS: We cloned and expressed Her2-ECD protein in E...
February 21, 2017: Clinical & Translational Oncology
https://www.readbyqxmd.com/read/28222613/phytochemical-investigations-and-antiproliferative-secondary-metabolites-from-thymus-alternans-growing-in-slovakia
#4
Stefano Dall'Acqua, Gregorio Peron, Sara Ferrari, Valentina Gandin, Massimo Bramucci, Luana Quassinti, Pavol Mártonfi, Filippo Maggi
CONTEXT: Thymus alternans Klokov (Lamiaceae) is a neglected species of the genus Thymus (Sect. Serpyllum) endemic to Carpathian area, where it is used as a flavouring agent and for medicinal purposes. OBJECTIVE: The aim of the work was to identify antiproliferative constituents from the flowering aerial parts of this plant. MATERIALS AND METHODS: Thymus alternans extracts were analyzed by HPLC-MS(n) and subjected to extensive chromatographic separations...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/28222586/knockdown-of-zeb1-suppresses-the-formation-of-vasculogenic-mimicry-in-breast-cancer-cell-line-mda-mb-231-through-downregulation-of-flk-1
#5
Huiying Li, Shasha Song, Yintao Xu, Jia Zhao, Huantao Liu
No abstract text is available yet for this article.
April 2017: Minerva Medica
https://www.readbyqxmd.com/read/28222208/effect-of-thiolated-glycosaminoglycans-on-the-behavior-of-breast-cancer-cells-toward-the-development-of-in-vitro-models-of-cancer
#6
Alexander Köwitsch, Ankur Chhalotre, Thomas Groth
PURPOSE: The influence of extracellular matrix components like glycosaminoglycans (GAG) or adhesive proteins on the migration of cancer cells and the progression of tumorigenesis remains a challenging task. Therefore, this study aims to give insight into the interaction of cancer cells exhibiting different metastatic potential (MDA-MB-231, MDA-MB-468) with surface immobilized GAG interacting with serum proteins like fibronectin. METHODS: Model substrata were covalently coated with different thiolated GAG (hyaluronan (HA), chondroitin sulfate (CS), heparin (Hep)) and investigated for the adsorption of fibronectin (FN) with surface plasmon resonance...
February 18, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28220627/downregulation-of-mirna-141-in-breast-cancer-cells-is-associated-with-cell-migration-and-invasion-involvement-of-anp32e-targeting
#7
Ping Li, Tao Xu, Xin Zhou, Liangying Liao, Guolian Pang, Wan Luo, Lu Han, Jiankun Zhang, Xianyong Luo, Xiaobing Xie, Kuichun Zhu
MicroRNAs (miRNAs) regulate many cellular activities, including cancer development, progression, and metastasis. Some miRNAs are involved in breast cancer (BC) migration and invasion, thus affect patients' prognosis. Microarray analysis was performed to compare miRNA expression in BC tissues, and results confirmed by qPCR. BC cell migration and invasion were studied in vitro with MDA-MB-231 cells using microplate transwell assays. miRNA targeting was investigated using luciferase assays, qPCR, and Western blot analysis in cells with overexpression of miRNA mimics...
February 21, 2017: Cancer Medicine
https://www.readbyqxmd.com/read/28220193/hsa-mir-4485-regulates-mitochondrial-functions-and-inhibits-the-tumorigenicity-of-breast-cancer-cells
#8
Lakshmi Sripada, Kritarth Singh, Anastasiya V Lipatova, Aru Singh, Paresh Prajapati, Dhanendra Tomar, Khyati Bhatelia, Milton Roy, Rochika Singh, Madan M Godbole, Peter M Chumakov, Rajesh Singh
The modulation of mitochondrial functions is important for maintaining cellular homeostasis. Mitochondria essentially depend on the import of RNAs and proteins encoded by the nuclear genome. MicroRNAs encoded in the nucleus can translocate to mitochondria and target the genome, affecting mitochondrial function. Here, we analyzed the role of miR-4485 in the regulation of mitochondrial functions. We showed that miR-4485 translocated to mitochondria where its levels varied in response to different stress conditions...
February 20, 2017: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
https://www.readbyqxmd.com/read/28219700/inhibition-of-ros-production-autophagy-or-apoptosis-signaling-reversed-the-anticancer-properties-of-antrodia-salmonea-in-triple-negative-breast-cancer-mda-mb-231-cells
#9
Chia-Ting Chang, Mallikarjuna Korivi, Hui-Chi Huang, Varadharajan Thiyagarajan, Kai-Yuan Lin, Pei-Jane Huang, Jer-Yuh Liu, You-Cheng Hseu, Hsin-Ling Yang
We investigated the in vitro and in vivo anticancer properties of Antrodia salmonea (AS), a well-known edible/medicinal mushroom in Taiwan, on human triple-negative breast cancer (MDA-MB-231) cells and xenografted nude mice; and revealed the underlying molecular mechanisms involved in autophagic- and apoptotic-cell death. Treatment of MDA-MB-231 cells with fermented culture broth of AS (0-200 μg/mL) inhibited cell viability/growth. AS-induced autophagy was evidenced via increased LC3-II accumulation, GFP-LC3 puncta and AVOs formation in MDA-MB-231 cells...
February 17, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28218039/demethylation-and-alterations-in-the-expression-level-of-the-cell-cycle-related-genes-as-possible-mechanisms-in-arsenic-trioxide-induced-cell-cycle-arrest-in-human-breast-cancer-cells
#10
Farima Moghaddaskho, Haniyeh Eyvani, Mohsen Ghadami, Javad Tavakkoly-Bazzaz, Kamran Alimoghaddam, Ardeshir Ghavamzadeh, Seyed H Ghaffari
Arsenic trioxide (As2O3) has been used clinically as an anti-tumor agent. Its mechanisms are mostly considered to be the induction of apoptosis and cell cycle arrest. However, the detailed molecular mechanisms of its anti-cancer action through cell cycle arrest are poorly known. Furthermore, As2O3 has been shown to be a potential DNA methylation inhibitor, inducing DNA hypomethylation. We hypothesize that As2O3 may affect the expression of cell cycle regulatory genes by interfering with DNA methylation patterns...
February 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28216624/dual-targeted-hybrid-nanoparticles-of-synergistic-drugs-for-treating-lung-metastases-of-triple-negative-breast-cancer-in-mice
#11
Tian Zhang, Preethy Prasad, Ping Cai, Chunsheng He, Dan Shan, Andrew Michael Rauth, Xiao Yu Wu
Lung metastasis is the major cause of death in patients with triple negative breast cancer (TNBC), an aggressive subtype of breast cancer with no effective therapy at present. It has been proposed that dual-targeted therapy, ie, targeting chemotherapeutic agents to both tumor vasculature and cancer cells, may offer some advantages. The present work was aimed to develop a dual-targeted synergistic drug combination nanomedicine for the treatment of lung metastases of TNBC. Thus, Arg-Gly-Asp peptide (RGD)-conjugated, doxorubicin (DOX) and mitomycin C (MMC) co-loaded polymer-lipid hybrid nanoparticles (RGD-DMPLN) were prepared and characterized...
February 20, 2017: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/28216300/boronic-acid-tethered-amphiphilic-hyaluronic-acid-derivative-based-nanoassemblies-for-tumor-targeting-and-penetration
#12
Jae Young Jeong, Eun-Hye Hong, Song Yi Lee, Jae-Young Lee, Jae-Hyoung Song, Seung-Hak Ko, Jae-Seong Shim, Sunghwa Choe, Dae-Duk Kim, Hyun-Jeong Ko, Hyun-Jong Cho
(3-Aminomethylphenyl)boronic acid (AMPB)-installed hyaluronic acid-ceramide (HACE)-based nanoparticles (NPs), including manassantin B (MB), were fabricated for tumor-targeted delivery. The amine group of AMPB was conjugated to the carboxylic acid group of hyaluronic acid (HA) via amide bond formation, and synthesis was confirmed by spectroscopic methods. HACE-AMPB/MB NPs with a 239-nm mean diameter, narrow size distribution, negative zeta potential, and > 90% drug encapsulation efficiency were fabricated...
February 16, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28216015/differential-regulation-of-nm23-h1-under-hypoxic-and-serum-starvation-conditions-in-metastatic-cancer-cells-and-its-implication-in-emt
#13
Reyaz Ur Rasool, Debasis Nayak, Souneek Chakraborty, Vijay Lakshmi Jamwal, Vidushi Mahajan, Archana Katoch, Mir Mohd Faheem, Zainab Iqra, Hina Amin, Sumit G Gandhi, Anindya Goswami
Multiple stresses are prevalent inside the tumor microenvironment rendering tumor growth, neighboring invasion and metastasis of the cancer cells to distant organs. NM23-H1 is the first metastasis suppressor gene identified and known to be implicated as an important regulator of stress-induced metastasis. Herein, we demonstrated that prototypical NM23-H1 expression diminished during hypoxia and serum starvation in Panc-1/MDA-MB-231 cells, but converse invasion patterns were obtained in these two diverse stresses...
February 4, 2017: European Journal of Cell Biology
https://www.readbyqxmd.com/read/28213701/ursolic-acid-mediated-changes-in-glycolytic-pathway-promote-cytotoxic-autophagy-and-apoptosis-in-phenotypically-different-breast-cancer-cells
#14
Anna Lewinska, Jagoda Adamczyk-Grochala, Ewa Kwasniewicz, Anna Deregowska, Maciej Wnuk
Plant-derived pentacyclic triterpenotids with multiple biological activities are considered as promising candidates for cancer therapy and prevention. However, their mechanisms of action are not fully understood. In the present study, we have analyzed the effects of low dose treatment (5-20 µM) of ursolic acid (UA) and betulinic acid (BA) on breast cancer cells of different receptor status, namely MCF-7 (ER(+), PR(+/-), HER2(-)), MDA-MB-231 (ER(-), PR(-), HER2(-)) and SK-BR-3 (ER(-), PR(-), HER2(+)). UA-mediated response was more potent than BA-mediated response...
February 17, 2017: Apoptosis: An International Journal on Programmed Cell Death
https://www.readbyqxmd.com/read/28212337/synthesis-anti-breast-cancer-activity-and-molecular-docking-study-of-a-new-group-of-acetylenic-quinolinesulfonamide-derivatives
#15
Krzysztof Marciniec, Bartosz Pawełczak, Małgorzata Latocha, Leszek Skrzypek, Małgorzata Maciążek-Jurczyk, Stanisław Boryczka
In this study, a series of regioisomeric acetylenic sulfamoylquinolines are designed, synthesized, and tested in vitro for their antiproliferative activity against three human breast cacer cell lines (T47D, MCF-7, and MDA-MB-231) and a human normal fibroblast (HFF-1) by 4-[3-(4-iodophenyl)-2-(4-nitrophenyl)-2H-5-tetrazolio]-1,3-benzene disulfonate (WST-1) assay. The antiproliferative activity of the tested acetylenic quinolinesulfonamides is comparable to that of cisplatin. The bioassay results demonstrate that most of the tested compounds show potent antitumor activities, and that some compounds exhibit better effects than the positive control cisplatin against various cancer cell lines...
February 16, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28209486/vasodilator-stimulated-phosphoprotein-vasp-depletion-from-breast-cancer-mda-mb-231-cells-inhibits-tumor-spheroid-invasion-through-downregulation-of-migfilin-%C3%AE-catenin-and-urokinase-plasminogen-activator-upa
#16
Vasiliki Gkretsi, Andreas Stylianou, Triantafyllos Stylianopoulos
A hallmark of cancer cells is their ability to invade surrounding tissues and form metastases. Cell-extracellular matrix (ECM)-adhesion proteins are crucial in metastasis, connecting tumor ECM with actin cytoskeleton thus enabling cells to respond to mechanical cues. Vasodilator-stimulated phosphoprotein (VASP) is an actin-polymerization regulator which interacts with cell-ECM adhesion protein Migfilin, and regulates cell migration. We compared VASP expression in MCF-7 and MDA-MB-231 breast cancer (BC) cells and found that more invasive MDA-MB-231 cells overexpress VASP...
February 13, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28208261/construction-of-aiegens-based-bioprobe-with-two-fluorescent-signals-for-enhanced-monitor-of-extracellular-and-intracellular-telomerase-activity
#17
Yuan Zhuang, Chunli Shang, Xiaoding Lou, Fan Xia
Detections of telomerase activity in vitro and in living cells are of great importance for clinical diagnosis of cancer. In this work, an AIEgens-based bioprobe with two fluorescent signals for enhanced monitor of extracellular and intracellular telomerase activity is designed. After addition of telomerase, two positively charged AIEgens (Silole-R and TPE-H) bind to quencher group labeled primer (QP) and the extension repeated units, leading enhancement of two telomerase-triggered fluorescent signals. Furthermore, by combination the wider linear range in vitro and lower background in living cells imaging, the bioprobe is used to detect telomerase extracted from various cell lines (MCF-7, HeLa, E-J, and HLF), 50 bladder cancer patients' urine samples, 10 normal people's urine samples, and also applied in mapping telomerase activity inside living cells (MCF-7, HeLa, MDA-MB-231, and HT1080)...
February 7, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28207159/the-critical-role-of-the-znf217-oncogene-in-promoting-breast-cancer-metastasis-to-the-bone
#18
Aurélie Bellanger, Caterina F Donini, Julie A Vendrell, Jonathan Lavaud, Irma Machuca-Gayet, Maëva Ruel, Julien Vollaire, Evelyne Grisard, Balázs Győrffy, Ivan Bièche, Olivier Peyruchaud, Jean-Luc Coll, Isabelle Treilleux, Véronique Maguer-Satta, Véronique Josserand, Pascale A Cohen
Bone metastasis affects more than 70% of patients with advanced breast cancer. However, the molecular mechanisms underlying this process remain unclear. Based on the analysis of clinical datasets, and in vitro and in vivo experiments, we report that the ZNF217 oncogene is a crucial mediator and indicator of bone metastasis. Patients with high ZNF217 mRNA expression levels in primary breast tumours had a higher risk of developing bone metastases. MDA-MB-231 breast cancer cells stably transfected with ZNF217 (MDA-MB-231-ZNF217) displayed the dysregulated expression of a set of genes with bone homing and metastasis characteristics, which overlapped with two previously described "osteolytic bone metastasis" gene signatures, while also highlighting the bone morphogenetic protein (BMP) pathway...
February 16, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/28205588/hypoxia-induced-angiotensin-ii-by-the-lactate-chymase-dependent-mechanism-mediates-radioresistance-of-hypoxic-tumor-cells
#19
Guozhu Xie, Ying Liu, Qiwei Yao, Rong Zheng, Lanfang Zhang, Jie Lin, Zhaoze Guo, Shasha Du, Chen Ren, Quan Yuan, Yawei Yuan
The renin-angiotensin system (RAS) is a principal determinant of arterial blood pressure and fluid and electrolyte balance. RAS component dysregulation was recently found in some malignancies and correlated with poor patient outcomes. However, the exact mechanism of local RAS activation in tumors is still unclear. Here, we find that the local angiotensin II predominantly exists in the hypoxic regions of tumor formed by nasopharyngeal carcinoma CNE2 cells and breast cancer MDA-MB-231 cells, where these tumor cells autocrinely produce angiotensin II by a chymase-dependent rather than an angiotensin converting enzyme-dependent mechanism...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28202937/focal-adhesion-kinase-activity-is-required-for-actomyosin-contractility-based-invasion-of-cells-into-dense-3d-matrices
#20
Claudia T Mierke, Tony Fischer, Stefanie Puder, Tom Kunschmann, Birga Soetje, Wolfgang H Ziegler
The focal adhesion kinase (FAK) regulates the dynamics of integrin-based cell adhesions important for motility. FAK's activity regulation is involved in stress-sensing and focal-adhesion turnover. The effect of FAK on 3D migration and cellular mechanics is unclear. We analyzed FAK knock-out mouse embryonic fibroblasts and cells expressing a kinase-dead FAK mutant, R454-FAK, in comparison to FAK wild-type cells. FAK knock-out and FAK(R454/R454) cells invade dense 3D matrices less efficiently. These results are supported by FAK knock-down in wild-type fibroblasts and MDA-MB-231 human breast cancer cells showing reduced invasiveness...
February 16, 2017: Scientific Reports
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