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https://www.readbyqxmd.com/read/29768226/comparison-of-the-effects-of-three-kinds-of-igys-normal-nanoliposomal-and-nanoparticle-conjugated-which-are-produced-against-the-small-domains-of-dr5-protein-on-cancer-cells
#1
Shaghaegh Amirijavid, Maliheh Entezari
Cancer treatment with several kinds of drugs, especially targets the apoptotic pathways nowadays. TNF-related apoptosis-inducing ligand (TRAIL) as one of the important members of death receptors, significantly trigger induction of apoptosis in cancer cells. Three conserved domains of Death receptor (DR5) protein extracellular domain, which are fortified cysteine, were chosen and chemically synthesised. Hens were immunised with nano-liposomal peptides, and as a result the purified Immunoglobulin (IgYs) remarkably killed the cancerous MCF7 cells...
June 2018: IET Nanobiotechnology
https://www.readbyqxmd.com/read/29765551/functional-significance-of-co-occurring-mutations-in-pik3ca-and-map3k1-in-breast-cancer
#2
Alvaro Avivar-Valderas, Robert McEwen, Amir Taheri-Ghahfarokhi, Larissa S Carnevalli, Elizabeth L Hardaker, Marcello Maresca, Kevin Hudson, Elizabeth A Harrington, Francisco Cruzalegui
The PI3Kα signaling pathway is frequently hyper-activated in breast cancer (BrCa), as a result of mutations/amplifications in oncogenes (e.g. HER2 ), decreased function in tumor suppressors (e.g. PTEN ) or activating mutations in key components of the pathway. In particular, activating mutations of PIK3CA (~45%) are frequently found in luminal A BrCa samples. Genomic studies have uncovered inactivating mutations in MAP3K1 (13-20%) and MAP2K4 (~8%), two upstream kinases of the JNK apoptotic pathway in luminal A BrCa samples...
April 20, 2018: Oncotarget
https://www.readbyqxmd.com/read/29764213/a-novel-non-invasive-strategy-for-low-level-laser-induced-cancer-therapy-by-using-new-ag-zno-and-nd-zno-functionalized-reduced-graphene-oxide-nanocomposites
#3
Saeed Jafarirad, Ebrahim Hammami Torghabe, Seyed Hosseyn Rasta, Roya Salehi
In the present research, an effective drug-free approach was developed to kill MCF7 breast cancer cells using low-level laser therapy (LLLT) combined with reduced graphene oxide (rGO)-based hybrid nanocomposites (NCs). Here, fruit extract of Rosa canina was used for the first time to obtain the rGO/ZnO, Ag-ZnO/rGO and Nd-ZnO/rGO NCs by green synthesis. Physico/photochemical properties of these NCs were evaluated using FTIR, XRD, Raman, XPS, SEM/EDX, UV-Vis, DLS and AFM. The potential of the as-synthesized NCs on ROS generating and antioxidant activity were assessed by DPPH...
May 15, 2018: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29763890/mir-301a-3p-suppresses-estrogen-signaling-by-directly-inhibiting-esr1-in-er%C3%AE-positive-breast-cancer
#4
Sandra Lettlova, Veronika Brynychova, Jan Blecha, David Vrana, Magdalena Vondrusova, Pavel Soucek, Jaroslav Truksa
BACKGROUND/AIMS: MiRNA-301a-3p is an oncogenic miRNA whose expression is associated with tumor development, metastases and overall poor prognosis. Estrogen receptor α (ERα) is one of the estrogen hormone-activated transcription factors, which regulates a large number of genes and is involved in the mammary gland development. Expression of ERα is considered to be a good indicator for endocrine therapy and breast cancer survival. Loss of ERα in breast cancer patients indicates invasiveness and poor prognosis...
2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29755920/patterns-of-chemical-diversity-in-the-marine-ascidian-phallusia-spp-anti-tumor-activity-and-metabolic-pathway-inhibiting-steroid-biosynthesis
#5
Satheesh Kumar Palanisamy, Velusamy Arumugam, Magesh D Peter, Umamaheswari Sundaresan
The complex nature of marine biodiversity is partially responsible for the lack of studies in Indian ascidian species, which often target a small number of novel biomolecules. We performed untargeted metabolomics using gas chromatography-mass spectrometry (GC-MS) in two invasive ascidian species to investigate the inter-specific chemical diversity of Phallusia nigra and P. arabica in search of drug-like properties and metabolic pathways. The chemical profiling of individual ascidian species was obtained using GC-MS, and the metabolites were determined by searching in NIST library and literature data...
May 2018: 3 Biotech
https://www.readbyqxmd.com/read/29753772/increase-in-hyaluronic-acid-degradation-decreases-the-expression-of-estrogen-receptor-alpha-in-mcf7-breast-cancer-cell-line
#6
Vincent Hanoux, Judith Eguida, Emmanuelle Fleurot, Jérôme Levallet, Pierre-Jacques Bonnamy
The loss of estrogen receptor α (ERα) expression in breast cancer constitutes a major hallmark of tumor progression to metastasis and is generally correlated to a strong increase in Hyaluronic Acid (HA) turnover. The aim of our study was to search for a putative link between these two major events of breast cancer progression in the estrogen receptor-positive (ER+) MCF7 breast cancer cell line. The increase in HA turnover was performed by stable overexpression of the standard CD44 (CD44S) isoform and also by treatment with exogenous Hyaluronidase (Hyal) to allow an increase in HA catabolism...
May 10, 2018: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/29752284/analysis-of-the-thrombotic-and-fibrinolytic-activities-of-tumor-cell-derived-extracellular-vesicles
#7
Ludovic Durrieu, Alamelu Bharadwaj, David M Waisman
Exosomes and microvesicles (MVs) are small extracellular vesicles secreted by tumor cells and are suggested to contribute to the thrombotic events that commonly occur in patients with advanced malignancies. Paradoxically, these vesicles have been reported to also possess fibrinolytic activity. To determine whether thrombotic or fibrinolytic activity is a predominant characteristic of these extracellular vesicles, we prepared exosomes and MVs from 2 breast cancer cell lines (MDA-MB-231 and MCF7), a lung cancer cell line (A549), and a leukemia cell line (NB4) and assayed their thrombotic and fibrinolytic activities...
May 22, 2018: Blood Advances
https://www.readbyqxmd.com/read/29752116/antimicrobial-and-anticancer-activities-of-silver-nanoparticles-synthesized-from-the-root-hair-extract-of-phoenix-dactylifera
#8
Mohammad Oves, Mohammad Aslam, Mohd Ahmar Rauf, Shariq Qayyum, Huda A Qari, Mohd Shahnawaz Khan, Mohammad Zubair Alam, Shams Tabrez, Arivalagan Pugazhendhi, Iqbal M I Ismail
There is a continuous rise in the rate of medicine consumption because of the development of drug resistance by microbial pathogens. In the last one decade, silver nanoparticles (AgNPs) have become a remarkable choice for the development of new drugs due to their excellent broad-spectrum antimicrobial activity. In the current piece of work, we have synthesized AgNPs from the root extract of Phoenix dactylifera to test their antimicrobial and anti-cancer potential. UV-visible spectra showed the surface plasmon resonance peak at 420 nm λmax corresponding to the formation of silver nanoparticles, FTIR spectra further confirmed the involvement of biological moieties in AgNPs synthesis...
August 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/29749438/oct4-suppresses-ir%C3%A2-induced-premature-senescence-in-breast-cancer-cells-through-stat3-and-nf%C3%A2-%C3%AE%C2%BAb-mediated-il%C3%A2-24-production
#9
Jeong-Yub Kim, Jeong-Chul Kim, Ji-Yun Lee, Myung-Jin Park
Breast cancer stem cells (BCSCs) are a small subpopulation of breast cancer cells that have been proposed to be a primary cause of failure of therapies, including ionizing radiation (IR). Their embryonic stem-like signature is associated with poor clinical outcome. In the present study, the function of octamer-binding transcription factor 4 (Oct4), an embryonic stem cell factor, in the resistance of BCSCs to IR was investigated. Mammosphere cells exhibited increased expression of stemness-associated genes, including Oct4 and sex‑determining region Y‑box 2 (Sox2), and were more resistant to IR compared with serum-cultured monolayer cells...
May 2, 2018: International Journal of Oncology
https://www.readbyqxmd.com/read/29748931/selenium-nanoparticles-induce-the-chemo-sensitivity-of-fluorouracil-nanoparticles-in-breast-and-colon-cancer-cells
#10
Ahmed A Abd-Rabou, Aziza B Shalby, Hanaa H Ahmed
Drug resistance is a major challenge of breast and colon cancer therapies leading to treatment failure. The main objective of the current study is to investigate whether selenium nanoparticles (nano-Se) can induce the chemo-sensitivity of 5-fluorouracil (FU)-encapsulated poly (D, L-lactide-co-glycolide) nanoparticles (nano-FU) in breast and colon cancer cell lines. Nano-Se and nano-FU were synthesized and characterized, then applied individually or in combination upon MCF7, MDA-MB-231, HCT 116, and Caco-2 cancerous cell lines...
May 11, 2018: Biological Trace Element Research
https://www.readbyqxmd.com/read/29746134/ajmaline-oxindole-and-cytotoxic-macroline-akuammiline-bisindole-alkaloids-from-alstonia-penangiana
#11
Joanne Soon-Yee Yeap, Suerialoasan Navanesan, Kae-Shin Sim, Kien-Thai Yong, Subramaniam Gurusamy, Siew-Huah Lim, Yun-Yee Low, Toh-Seok Kam
Examination of the EtOH extract of the Malayan Alstonia penangiana resulted in the isolation of 10 new alkaloids, comprising two ajmaline (1, 2), four macroline oxindole (3-6), and four macroline-akuammiline bisindole alkaloids (7-10). The structures of these alkaloids were determined based on analysis of the spectroscopic data and, in the case of the oxindole 6 and the bisindole alkaloid 7, also confirmed by X-ray diffraction analysis. The bisindole alkaloids 7 and 8 showed pronounced in vitro growth inhibitory activity against an array of human cancer cell lines, including KB, vincristine-resistant KB, PC-3, LNCaP, MCF7, MDA-MB-231, HT-29, HCT 116, and A549 cells with IC50 values in the 0...
May 10, 2018: Journal of Natural Products
https://www.readbyqxmd.com/read/29743966/changes-of-keap1-nrf2-and-ikb-nf-%C3%AE%C2%BA-b-expression-levels-induced-by-cell-free-dna-in-different-cell-types
#12
Svetlana V Kostyuk, Lev N Porokhovnik, Elizaveta S Ershova, Elena M Malinovskaya, Marina S Konkova, Larisa V Kameneva, Olga A Dolgikh, Vladimir P Veiko, Vladimir M Pisarev, Andrew V Martynov, Vasilina A Sergeeva, Andrew A Kaliyanov, Anton D Filev, Julia M Chudakova, Margarita S Abramova, Serguey I Kutsev, Vera L Izhevskaya, Nataliya N Veiko
Cell-free DNA (cfDNA) is a circulating DNA of nuclear and mitochondrial origin mainly derived from dying cells. Recent studies have shown that cfDNA is a stress signaling DAMP (damage-associated molecular pattern) molecule. We report here that the expression profiles of cfDNA-induced factors NRF2 and NF- κ B are distinct depending on the target cell's type and the GC-content and oxidation rate of the cfDNA. Stem cells (MSC) have shown higher expression of NRF2 without inflammation in response to cfDNA. In contrast, inflammatory response launched by NF- κ B was dominant in differentiated cells HUVEC, MCF7, and fibroblasts, with a possibility of transition to massive apoptosis...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29741418/the-effect-of-sio-2-au-core-shell-nanoparticles-on-breast-cancer-cell-s-radiotherapy
#13
Ghazal Darfarin, Roya Salehi, Effat Alizadeh, Behnam Nasiri Motlagh, Abolfazl Akbarzadeh, Alireza Farajollahi
INTRODUCTION: Recently it has been shown that radiation dose enhancement could be achievable in radiotherapy using nanoparticles (NPs). In this study, evaluation was made to determine efficiency of gold-silica shell-core NP in megavoltage irradiation of MCF7 breath cancer cells. MATERIALS AND METHODS: Gold-silicon oxide shell-core NPs were obtained by conjugation of gold NP with amine or thiol functionalized silica NPs (AuN@SiO2 and AuS@SiO2 ). Cellular uptake and cytotoxicity of NPs were examined by fluorescent microscopy and MTT assay, respectively...
May 9, 2018: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29741101/ent-abietane-diterpenoids-from-suregada-zanzibariensis-baill-euphorbiaceae-their-cytotoxic-and-anticancer-properties
#14
Mandisa Mangisa, Vuyelwa J Tembu, Gerda Fouche, Rudzani Nthambeleni, Xolani Peter, Moses K Langat
The stem bark extract of Suregada zanzibariensis afforded a previously undescribed ent-abietane diterpenoid trivially named mangiolide (1) and a known jolkinolide B (2) via anticancer bioassay-guided fractionation. The CH2 Cl2 :MeOH extract of S. zanzibariensis was initially analysed for its anticancer properties against three cancer cell lines, renal (TK10), melanoma (UACC62), and breast (MCF7) and was found to be potent at low μg/mL ranges. Compound 1, 6α-acetoxy-14-keto-ent-abieta-7(8),13(15)-diene-16,12-olide (mangiolide) inhibited the growth of renal (TK10) with a GI50 of 0...
May 9, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29740030/mammary-fibroblasts-reduce-apoptosis-and-speed-estrogen-induced-hyperplasia-in-an-organotypic-mcf7-derived-duct-model
#15
Molly M Morgan, Megan K Livingston, Jay W Warrick, Eli M Stanek, Elaine T Alarid, David J Beebe, Brian P Johnson
The estrogen receptor (ER) regulates the survival and growth of breast cancer cells, but it is less clear how components of the tissue microenvironment affect ER-mediated responses. We set out to test how human mammary fibroblasts (HMFs) modulate ER signaling and downstream cellular responses. We exposed an organotypic mammary model consisting of a collagen-embedded duct structure lined with MCF7 cells to 17-β estradiol (E2), with and without HMFs in the surrounding matrix. MCF7 cells grown as ductal structures were polarized and proliferated at rates comparable to in vivo breast tissue...
May 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29736310/depletion-of-gamma-glutamylcyclotransferase-in-cancer-cells-induces-autophagy-followed-by-cellular-senescence
#16
Keiko Taniguchi, Kengo Matsumura, Hiromi Ii, Susumu Kageyama, Eishi Ashihara, Tokuhiro Chano, Akihiro Kawauchi, Tatsuhiro Yoshiki, Susumu Nakata
Gamma-glutamylcyclotransferase (GGCT) was originally identified as a protein highly expressed in bladder cancer tissues by proteomic analysis, and its higher expression in a variety of cancers compared to normal tissues have been shown. Depletion of GGCT in various cancer cells results in antiproliferative effects both in vitro and in vivo ; thus it is considered a promising therapeutic target. Although it has been shown that knockdown of GGCT induces cellular senescence and non-apoptotic cell death, associated with upregulation of cyclin-dependent kinase inhibitors (CDKIs) including p21WAF1/CIP1 , the cellular events that follow GGCT depletion are not fully understood...
2018: American Journal of Cancer Research
https://www.readbyqxmd.com/read/29735717/laterally-confined-growth-of-cells-induces-nuclear-reprogramming-in-the-absence-of-exogenous-biochemical-factors
#17
Bibhas Roy, Saradha Venkatachalapathy, Prasuna Ratna, Yejun Wang, Doorgesh Sharma Jokhun, Mallika Nagarajan, G V Shivashankar
Cells in tissues undergo transdifferentiation programs when stimulated by specific mechanical and biochemical signals. While seminal studies have demonstrated that exogenous biochemical factors can reprogram somatic cells into pluripotent stem cells, the critical roles played by mechanical signals in such reprogramming process have not been well documented. In this paper, we show that laterally confined growth of fibroblasts on micropatterned substrates induces nuclear reprogramming with high efficiency in the absence of any exogenous reprogramming factors...
May 7, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29731606/clickable-prodrugs-bearing-potent-and-hydrolytically-cleavable-nicotinamide-phosphoribosyltransferase-inhibitors
#18
Keivan Sadrerafi, Emilia O Mason, Mark W Lee
Purpose: Our previous study indicated that carborane containing small-molecule 1-(hydroxymethyl)-7-(4'-( trans -3″-(3'″-pyridyl)acrylamido)butyl)-1,7-dicarbadodecaborane (hm-MC4-PPEA), was a potent inhibitor of nicotinamide phosphoribosyltransferase (Nampt). Nampt has been shown to be upregulated in most cancers and is a promising target for the treatment of many different types of cancers, including breast cancers. Patients and methods: To increase the selectivity of hm-MC4-PPEA toward cancer cells, three prodrugs were synthesized with different hydrolyzable linkers: ester, carbonate, and carbamate...
2018: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/29730188/discovery-of-new-erbb4-inhibitors-repositioning-an-orphan-chemical-library-by-inverse-virtual-screening
#19
Assunta Giordano, Giovanni Forte, Luigia Massimo, Raffaele Riccio, Giuseppe Bifulco, Simone Di Micco
Inverse Virtual Screening (IVS) is a docking based approach aimed to the evaluation of the virtual ability of a single compound to interact with a library of proteins. For the first time, we applied this methodology to a library of synthetic compounds, which proved to be inactive towards the target they were initially designed for. Trifluoromethyl-benzenesulfonamides 3-21 were repositioned by means of IVS identifying new lead compounds (14-16, 19 and 20) for the inhibition of erbB4 in the low micromolar range...
April 12, 2018: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29729523/high-cd44-expression-mediates-p62-associated-nfe2l2-nrf2-activation-in-breast-cancer-stem-cell-like-cells-implications-for-cancer-stem-cell-resistance
#20
In-Geun Ryoo, Bo-Hyun Choi, Sae-Kwang Ku, Mi-Kyoung Kwak
Cluster of differentiation 44 (CD44) is the most common cancer stem cell (CSC) marker and high CD44 expression has been associated with anticancer drug resistance, tumor recurrence, and metastasis. In this study, we aimed to investigate the molecular mechanism by which CD44 and nuclear factor erythroid 2-like 2 (NFE2L2; NRF2), a key regulator of antioxidant genes, are linked to CSC resistance using CD44high breast CSC-like cells. NRF2 expression was higher in CD44high cell populations isolated from doxorubicin-resistant MCF7 (ADR), as well as MCF7, MDA-MB231, and A549 cells, than in corresponding CD44low cells...
April 26, 2018: Redox Biology
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