Read by QxMD icon Read


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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
Yongsheng Jia, Chunze Zhang, Liyan Zhou, Huijun Xu, Yehui Shi, Zhongsheng Tong
Micheliolide (MCL) is a promising novel compound with broad-spectrum anticancer activity. However, little is known regarding its action and mechanism in breast cancer. To explore the potential therapeutic application of MCL as a chemosensitivity modulator, this study investigated the effects of MCL on cisplatin sensitivity in breast cancer and the underlying mechanisms. In the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide cytotoxicity assay and a xenograft tumor model, MCL enhanced the cisplatin sensitivity of the breast cancer cell line MCF-7 both in vitro and in vivo...
2015: OncoTargets and Therapy
Sudarshan Kini, Dhirendra Bahadur, Dulal Panda
Polymeric chitosan-poly(D,L-lactide-co-glycolide) nanoparticles loaded with benomyl as anticancer drug formulation against multidrug-resistant EMT6/AR1 cells were synthesized by amine-carboxylate reaction. Using transmission electron microscopy, the average size of chitosan-poly(D,L-lactide-co-glycolide) nanoparticles and benomyl-encapsulated polymeric chitosan-poly(D,L-lactide-co-glycolide) nanoparticles was estimated to be 155 ± 20 nm and 160 ± 25 nm, respectively. Fourier transform infrared spectroscopy revealed that poly(D,L-lactide-co-glycolide) and chitosan are linked by covalent bonds...
May 2015: Journal of Biomedical Nanotechnology
Yanwei Teng, Min Bai, Ying Sun, Qi Wang, Fan Li, Jinfang Xing, Lianfang Du, Tao Gong, Yourong Duan
The gene knockdown activity of small interfering RNA (siRNA) has led to their use as potential therapeutics for a variety of diseases. However, successful gene therapy requires safe and efficient delivery systems. In this study, we choose mPEG-PLGA-PLL nanoparticles (PEAL NPs) with ultrasound targeted microbubble destruction (UTMD) to efficiently deliver siRNA into cells. An emulsification-solvent evaporation method was used to prepare siRNA-loaded PEAL NPs. The NPs possessed an average size of 132.6±10.3 nm (n=5), with a uniform spherical shape, and had an encapsulation efficiency (EE) of more than 98%...
2015: International Journal of Nanomedicine
Yin Yuan, Xuan Zhou, Yupeng Ren, Shupei Zhou, Lijie Wang, Shuangmin Ji, Ming Hua, Liang Li, Wei Lu, Tianyan Zhou
Our study aimed at the investigation of in vivo anticancer effect of the combination use of dexamethasone (DEX) and gemcitabine (GM) as well as the development of pharmacokinetic/pharmacodynamic (PK/PD) models in MCF-7 xenograft model. Further, simulations were conducted to optimize doses and administration schedules. The inhibitory effect of different doses and administration schedules were investigated in MCF-7 xenograft model. Semi-mechanism-based PK/PD models were established based on the preclinical data to characterize the relationship between plasma concentration and the time course of the drug response quantitatively...
December 2015: Journal of Pharmaceutical Sciences
José Luis Rodríguez-Chávez, Elvia Coballase-Urrutia, Gloria Sicilia-Argumedo, Teresa Ramírez-Apan, Guillermo Delgado
ETHNOPHARMACOLOGICAL RELEVANCE: Heterotheca ineuloides Cass (Asteraceae), popularly known as árnica mexicana, is widely used in Mexican traditional medicine to treat bruises, dermatological problems, rheumatic pains, and other disorders as cancer. The major constituents in H. inuloides are cadinane type sesquiterpenes, flavonoids and phytosterols. Compounds with a cadinane skeleton have been proved to possess cytotoxic activity against human-tumor cell lines and brine shrimp, and display toxic effects in different animal species...
December 4, 2015: Journal of Ethnopharmacology
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"