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https://www.readbyqxmd.com/read/29904714/changes-in-apoptotic-gene-expression-induced-by-the-dna-cross-linkers-epichlorohydrin-and-diepoxybutane-in-human-cell-lines
#1
Vanesa L Silvestri, Julie T Millard
Real time quantitative reverse transcription PCR was used to monitor changes in apoptotic gene expression after treating cells with the DNA cross-linkers epichlorohydrin (ECH) and diepoxybutane (DEB). This article presents the data obtained from application of the comparative CT method to the amplification of twelve apoptotic genes in human MCF10-A cells and eight genes in HUVEC cells. Further insight regarding the significance of these data can be found in "Cross-linking by epichlorohydrin and diepoxybutane correlates with cytotoxicity and leads to apoptosis in human leukemia (HL-60) cells" (Le et al...
August 2018: Data in Brief
https://www.readbyqxmd.com/read/29549854/tracing-the-ph-dependent-activation-of-autophagy-in-cancer-cells-by-silicon-nanowire-based-impedance-biosensor
#2
Alireza Alikhani, Milad Gharooni, Hamed Abiri, Fatemeh Farokhmanesh, Mohammad Abdolahad
Monitoring the pH dependent behavior of normal and cancer cells by impedimetric biosensor based on Silicon Nanowires (SiNWs) was introduced to diagnose the invasive cancer cells. Autophagy as a biologically activated process in invasive cancer cells during acidosis, protect them from apoptosis in lower pH which presented in our work. As the autophagy is the only activated pathways which can maintain cellular proliferation in acidic media, responses of SiNW-ECIS in acidified cells could be correlated to the probability of autophagy activation in normal or cancer cells...
May 30, 2018: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29534682/regulation-of-cnksr2-protein-stability-by-the-hect-e3-ubiquitin-ligase-smurf2-and-its-role-in-breast-cancer-progression
#3
Diana David, Arun Surendran, Jissa V Thulaseedharan, Asha S Nair
BACKGROUND: Smurf2 E3 ubiquitin ligase physically associates with and regulate the stability of distinct cellular protein substrates. The multi-functional scaffold protein Connector enhancer of kinase suppressor of ras 2 (CNKSR2) plays a key role in regulating cell proliferation, and differentiation through multiple receptor tyrosine kinase pathways. The aim of this study was to investigate whether the interaction between Smurf2 and CNKSR2 has any significant role in the post transcriptional regulation of CNKSR2 expression in breast cancer...
March 13, 2018: BMC Cancer
https://www.readbyqxmd.com/read/29197991/experimental-determination-of-folding-factor-of-benign-breast-cancer-cell-mcf10a-and-its-effect-on-contact-models-and-3d-manipulation-of-biological-particles
#4
M H Korayem, S Shahali, Z Rastegar
Plasma membrane of most cells is not smooth. The surfaces of both small and large micropermeable cells are folded and corrugated which makes mammalian cells to have a larger membrane surface than the supposed ideal mode, that is, the smooth sphere of the same volume. Since cancer is an anthropic disease, cancer cells tend to have a larger membrane area than normal cells. Therefore, cancer cells have higher folding factor and larger radius than normal and healthy cells. On the other hand, the prevalence of breast cancer has prompted researchers to improve the treatment options raised for the disease in the past...
December 2, 2017: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/29189985/evaluation-of-the-effect-of-the-new-methoxy-stilbenes-on-expression-of-receptors-and-enzymes-involved-in-estrogen-synthesis-in-cancer-breast-cells
#5
Barbara Licznerska, Hanna Szaefer, Marcin Wierzchowski, Renata Mikstacka, Katarzyna Papierska, Wanda Baer-Dubowska
Our previous study showed that the new synthetic methoxy-stilbenes, 3,4,2'-trimethoxy-trans-stilbene (3MS), 3,4,2',4'-tetramethoxy-trans-stilbene (4MS), and 3,4,2',4',6'-pentamethoxy-trans-stilbene (5MS), modulate the constitutive expression of enzymes and receptors involved in estrogen metabolism in breast immortalized epithelial MCF10 cells. In this study, we evaluated the effect of 3MS, 4MS, and 5MS in comparison to resveratrol activity in MCF7 estrogen-dependent and MDA-MB-231 estrogen-independent breast cancer cell lines...
November 30, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29030222/vascular-changes-in-tumors-resistant-to-a-vascular-disrupting-nanoparticle-treatment
#6
Shweta Sharma, Aman P Mann, Tarmo Mölder, Venkata Ramana Kotamraju, Robert Mattrey, Tambet Teesalu, Erkki Ruoslahti
Anti-angiogenic and vascular disrupting therapies rely on the dependence of tumors on new blood vessels to sustain tumor growth. We previously reported a potent vascular disrupting agent, a theranostic nanosystem consisting of a tumor vasculature-homing peptide (CGKRK) fused to a pro-apoptotic peptide [D (KLAKLAK)2 ] coated on iron oxide nanoparticles. This nanosystem showed promising therapeutic efficacy in glioblastoma (GBM) and breast cancer models. However, complete control of the tumors was not achieved, and some tumors became non-responsive to the treatment...
December 28, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28891568/selective-antitumoural-action-of-pressurized-mango-leaf-extracts-against-minimally-and-highly-invasive-breast-cancer
#7
M T Fernández-Ponce, A López-Biedma, C Sánchez-Quesada, L Casas, C Mantell, J J Gaforio, E J Martínez de la Ossa
Mango leaf tea has been traditionally used by different cultures to reduce inflammation in the body. There is evidence that chronic inflammation increases the risk of cancer. This study investigates the antitumoural effects of pressurized mango leaf extracts on minimally (MCF7) and highly invasive (MDA-MB-231) breast cancer cells as well as on non-tumourigenic cells (MCF10). Extracts showed protective properties against oxidation and cytotoxic effects against breast cancer cell lines, causing minor damage to non-carcinogenic cells...
October 18, 2017: Food & Function
https://www.readbyqxmd.com/read/28870936/subcellular-localization-of-maspin-correlates-with-histone-deacetylase-1-expression-in-human-breast-cancer
#8
Makoto Wakahara, Tomohiko Sakabe, Yasuaki Kubouchi, Keiko Hosoya, Yumi Hirooka, Yohei Yurugi, Kanae Nosaka, Tatsushi Shiomi, Hiroshige Nakamura, Yoshihisa Umekita
BACKGROUND/AIM: Maspin is known to be a tumor suppressor protein. Its nuclear localization and endogenous inhibition of histone deacetylase 1 (HDAC1) are considered crucial for its tumor suppressor activity. However, it remains unclear whether subcellular localization of maspin correlates with HDAC1 expression level in human breast cancer. PATIENTS AND METHODS: Immunohistochemical analyses were performed on 164 resected specimens of invasive breast carcinoma using antibodies for maspin and HDAC1...
September 2017: Anticancer Research
https://www.readbyqxmd.com/read/28605571/synthesis-dna-cleavage-activity-cytotoxicity-acetylcholinesterase-inhibition-and-acute-murine-toxicity-of-redox-active-ruthenium-ii-polypyridyl-complexes
#9
Nagham Alatrash, Eugenia S Narh, Abhishek Yadav, Mahn-Jong Kim, Thamara Janaratne, James Gabriel, Frederick M MacDonnell
Four mononuclear [(L-L)2 Ru(tatpp)]2+ and two dinuclear [(L-L)2 Ru(tatpp)Ru(L-L)2 ]4+ ruthenium(II) polypyridyl complexes (RPCs) containing the 9,11,20,22-tetraazatetrapyrido[3,2-a:2',3'-c:3'',2''-l:2''',3'''-n]pentacene (tatpp) ligand were synthesized, in which L-L is a chelating diamine ligand such as 2,2'-bipyridine (bpy), 1,10-phenanthroline (phen), 3,4,7,8-tetramethyl-1,10-phenanthroline (Me4 phen) or 4,7-diphenyl-1,10-phenanthroline (Ph2 phen). These Ru-tatpp analogues all undergo reduction reactions with modest reducing agents, such as glutathione (GSH), at pH 7...
July 6, 2017: ChemMedChem
https://www.readbyqxmd.com/read/28429743/novel-sumo-protease-senp7s-regulates-%C3%AE-catenin-signaling-and-mammary-epithelial-cell-transformation
#10
Samaneh Karami, Feng-Ming Lin, Santosh Kumar, Shaymaa Bahnassy, Hariprasad Thangavel, Maram Quttina, Yue Li, Jing Ren, Tasneem Bawa-Khalfe
SUMO post-translational modification of proteins or SUMOylation ensures normal cell function. Disruption of SUMO dynamics prompts various pathophysiological conditions, including cancer. The burden of deSUMOylating the large SUMO-proteome rests on 6 full-length mammalian SUMO-proteases or SENP. While multiple SENP isoforms exist, the function of these isoforms remains undefined. We now delineate the biological role of a novel SENP7 isoform SENP7S in mammary epithelial cells. SENP7S is the predominant SENP transcript in human mammary epithelia but is significantly reduced in precancerous ductal carcinoma in situ and all breast cancer subtypes...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28229259/acidicapsa-ferrireducens-sp-nov-acidicapsa-acidiphila-sp-nov-and-granulicella-acidiphila-sp-nov-novel-acidobacteria-isolated-from-metal-rich-acidic-waters
#11
Carmen Falagán, Bärbel Foesel, Barrie Johnson
Four novel strains of Acidobacteria were isolated from water samples taken from pit lakes at two abandoned metal mines in the Iberian Pyrite Belt mining district, south-west Spain. Three of the isolates belong to the genus Acidicapsa (MCF9T , MCF10T , and MCF14) and one of them to the genus Granulicella (MCF40T ). All isolates are moderately acidophilic (pH growth optimum 3.8-4.1) and mesophilic (temperature growth optima 30-32 °C). Isolates MCF10T and MCF40T grew at pH lower (<3.0) than previously reported for all other acidobacteria...
May 2017: Extremophiles: Life Under Extreme Conditions
https://www.readbyqxmd.com/read/27764205/adamts-1-is-found-in-the-nuclei-of-normal-and-tumoral-breast-cells
#12
Suély V Silva, Maíra A Lima, Nathalie Cella, Ruy G Jaeger, Vanessa M Freitas
Proteins secreted in the extracellular matrix microenvironment (ECM) by tumor cells are involved in cell adhesion, motility, intercellular communication and invasion. The tumor microenvironment is expansively modified and remodeled by proteases, resulting in important changes in both cell-cell and cell-ECM interactions and in the generation of new signals from the cell surface. Metalloproteinases belonging to the ADAMTS (a disintegrin and metalloprotease with thrombospondin motifs) family have been implicated in tissue remodeling events observed in cancer development, growth and progression...
2016: PloS One
https://www.readbyqxmd.com/read/27512948/three-dimensional-modelling-identifies-novel-genetic-dependencies-associated-with-breast-cancer-progression-in-the-isogenic-mcf10-model
#13
Sarah L Maguire, Barrie Peck, Patty T Wai, James Campbell, Holly Barker, Aditi Gulati, Frances Daley, Simon Vyse, Paul Huang, Christopher J Lord, Gillian Farnie, Keith Brennan, Rachael Natrajan
The initiation and progression of breast cancer from the transformation of the normal epithelium to ductal carcinoma in situ (DCIS) and invasive disease is a complex process involving the acquisition of genetic alterations and changes in gene expression, alongside microenvironmental and recognized histological alterations. Here, we sought to comprehensively characterise the genomic and transcriptomic features of the MCF10 isogenic model of breast cancer progression, and to functionally validate potential driver alterations in three-dimensional (3D) spheroids that may provide insights into breast cancer progression, and identify targetable alterations in conditions more similar to those encountered in vivo...
November 2016: Journal of Pathology
https://www.readbyqxmd.com/read/25960398/hyper-dependence-of-breast-cancer-cell-types-on-the-nuclear-transporter-importin-%C3%AE-1
#14
Henna V Kuusisto, David A Jans
We previously reported that overexpression of members of the Importin (Imp) superfamily of nuclear transporters results in increased nuclear trafficking through conventional transport pathways in tumour cells. Here we show for the first time that the extent of overexpression of Impβ1 correlates with disease state in the MCF10 human breast tumour progression system. Excitingly, we find that targeting Impβ1 activity through siRNA is >30 times more efficient in decreasing the viability of malignant ductal carcinoma cells compared to isogenic non-transformed counterparts, and is highly potent and tumour selective at subnanomolar concentrations...
August 2015: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/25934638/a-chromatin-code-for-alternative-splicing-involving-a-putative-association-between-ctcf-and-hp1%C3%AE-proteins
#15
Eneritz Agirre, Nicolás Bellora, Mariano Alló, Amadís Pagès, Paola Bertucci, Alberto R Kornblihtt, Eduardo Eyras
BACKGROUND: Alternative splicing is primarily controlled by the activity of splicing factors and by the elongation of the RNA polymerase II (RNAPII). Recent experiments have suggested a new complex network of splicing regulation involving chromatin, transcription and multiple protein factors. In particular, the CCCTC-binding factor (CTCF), the Argonaute protein AGO1, and members of the heterochromatin protein 1 (HP1) family have been implicated in the regulation of splicing associated with chromatin and the elongation of RNAPII...
2015: BMC Biology
https://www.readbyqxmd.com/read/25916942/the-antioxidant-and-chemical-properties-of-berberis-vulgaris-and-its-cytotoxic-effect-on-human-breast-carcinoma-cells
#16
Reyhane Hoshyar, Zahra Mahboob, Asghar Zarban
In this study we evaluated the biological activity of alcoholic and aqueous extracts from the fruit of Berberis vulgaris. The total antioxidant capacity of Berberis was characterized by FRAP, DPPH, Folin-Ciocalteu while the anthocyanins content was measured by pH differential method. Cell viability and apoptotic property were determined by MTT and DNA fragmentation assays, respectively. Alcoholic extract of Berberis was richer in antioxidants and anthocyanins compared to aqueous extract. Although both extracts significantly inhibited proliferation of breast cancer cells (MCF-7); these changes were not observed in normal human breast epithelial cells (MCF10-A)...
August 2016: Cytotechnology
https://www.readbyqxmd.com/read/25844035/study-of-antitumor-activity-in-breast-cell-lines-using-silver-nanoparticles-produced-by-yeast
#17
Francisco G Ortega, Martín A Fernández-Baldo, Jorge G Fernández, María J Serrano, María I Sanz, Juan J Diaz-Mochón, José A Lorente, Julio Raba
In the present article, we describe a study of antitumor activity in breast cell lines using silver nanoparticles (Ag NPs) synthesized by a microbiological method. These Ag NPs were tested for their antitumor activity against MCF7 and T47D cancer cells and MCF10-A normal breast cell line. We analyzed cell viability, apoptosis induction, and endocytosis activity of those cell lines and we observed that the effects of the biosynthesized Ag NPs were directly related with the endocytosis activity. Moreover, Ag NPs had higher inhibition efficacy in tumor lines than in normal lines of breast cells, which is due to the higher endocytic activity of tumor cells compared to normal cells...
2015: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/25324134/prokineticin-receptor-identified-by-phage-display-is-an-entry-receptor-for-trypanosoma-cruzi-into-mammalian-cells
#18
K G Khusal, R R Tonelli, E C Mattos, C O Soares, B M Di Genova, M A Juliano, U Urias, W Colli, M J M Alves
Trypanosoma cruzi trypomastigotes invade a great variety of mammalian cells, with several molecules being implicated in this complex event. Herein, the sequence GGIALAG present in prokineticin-2 receptor (PKR2), selected by phage display technology, is described as a new T. cruzi receptor for the Tc85 group of glycoproteins belonging to the gp85/TS superfamily and involved in cellular invasion of mammalian hosts. This finding is confirmed by the inhibitory activity of MCF10-A (human mammary) cell invasion by T...
January 2015: Parasitology Research
https://www.readbyqxmd.com/read/25205719/cathepsin-b-deficient-mice-as-source-of-monoclonal-anti-cathepsin-b-antibodies
#19
Ekkehard Weber, Elena Barbulescu, Rita Medek, Thomas Reinheckel, Mansoureh Sameni, Arulselvi Anbalagan, Kamiar Moin, Bonnie F Sloane
Cathepsin B has been demonstrated to be involved in several proteolytic processes that support tumor progression and metastasis and neurodegeneration. To further clarify its role, defined monoclonal antibodies are needed. As the primary structure of human cathepsin B is almost identical to that of the mouse, cathepsin B-deficient mice were used in a novel approach for generating such antibodies, providing the chance of an increased immune response to the antigen, human cathepsin B. Thirty clones were found to produce cathepsin B-specific antibodies...
March 2015: Biological Chemistry
https://www.readbyqxmd.com/read/24659938/synthetic-triterpenoids-can-protect-against-toxicity-without-reducing-the-efficacy-of-treatment-with-carboplatin-and-paclitaxel-in-experimental-lung-cancer
#20
Karen T Liby
Synthetic oleanane triterpenoids are multifunctional drugs being developed for the prevention and treatment of a variety of chronic diseases driven by inflammation and oxidative stress. Low nanomolar concentrations of triterpenoids inhibit the induction of inflammatory cytokines, and these drugs are potent activators of the Nrf2 cytoprotective pathway. In contrast, low micromolar concentrations of triterpenoids increased the production of ROS and induced apoptosis in a dose-dependent manner in malignant MCF10 CA1a breast cancer cells...
January 2014: Dose-response: a Publication of International Hormesis Society
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