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https://www.readbyqxmd.com/read/27933483/covalent-immobilization-of-human-placental-17%C3%AE-hydroxysteroid-dehydrogenase-type-1-onto-glutaraldehyde-activated-silica-coupled-with-lc-tof-ms-for-anti-cancer-drug-screening-applications
#1
Yin Bai, Wen-Di Zhou, Xian-Min Mu, Qian Zhang, Chen Yu, Bin Di, Meng-Xiang Su
Human 17β-hydroxysteroid dehydrogenase type 1 (17β-HSD1), a potential target in breast cancer prevention and therapy, was extracted from human placenta and immobilized on nonporous silica (∼5 μm) with a covalent method for the first time. The optimum initial enzyme concentration and immobilization time during the immobilization process were 0.42 mg mL(-1) and 12 h, repectively. The binding was confirmed by scanning electron microscope (SEM) and infrared spectroscopy (FT-IR). It could improve the pH, thermal and storage stability compared to free enzyme...
December 8, 2016: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/27928952/in-vitro-anticancer-evaluation-of-platinum-ii-iv-complexes-with-diisoamyl-ester-of-s-s-ethylenediamine-n-n-di-2-propanoic-acid
#2
Bojana B Zmejkovski, Nebojša Pantelić, Lana Filipović, Sandra Aranđelović, Siniša Radulović, Tibor J Sabo, Goran N Kaluđerović
Platinum(II) and platinum(IV) complexes [PtCln{(S,S)-(i-Am)2eddip}] (n = 2, 4: 1, 2, respectively; (S,S)-(i-Am)2eddip = O,O'-diisoamyl-(S,S)-ethylenediamine-N,N'-di-2-propanoate) were synthesized and characterized by elemental analysis, IR, 1H and 13C NMR spectroscopy and mass spectrometry. Quantum chemical calculations were used to predict formed isomers of 1 and 2. Furthermore, reduction of 2 with ascorbic acid was followed by time-dependant 13C NMR spectroscopy in order to enable assignation of the formed isomers for complex 1...
December 7, 2016: Anti-cancer Agents in Medicinal Chemistry
https://www.readbyqxmd.com/read/27924981/hts-ftir-spectroscopy-allows-the-classification-of-polyphenols-according-to-their-differential-effects-on-the-mda-mb-231-breast-cancer-cell-line
#3
A Mignolet, V Mathieu, E Goormaghtigh
Breast cancer is a major public health issue among women in the world. Meanwhile new anticancer treatments struggle more and more to be accepted in the pharmaceutical market and research costs still increase. There is therefore a need to find new treatments and new screening methods to test them more quickly and efficiently. Among natural compounds, an increasing interest has been given to polyphenols as they can take action at the different stages of carcinogenesis, from tumour initiation to metastasis formation, by disturbing multiple cellular signalling pathways...
December 7, 2016: Analyst
https://www.readbyqxmd.com/read/27924154/early-diagnosis-of-brain-metastases-using-a-biofluids-metabolomics-approach-in-mice
#4
James R Larkin, Alex M Dickens, Timothy D W Claridge, Claire Bristow, Kleopatra Andreou, Daniel C Anthony, Nicola R Sibson
Over 20% of cancer patients will develop brain metastases. Prognosis is currently extremely poor, largely owing to late-stage diagnosis. We hypothesized that biofluid metabolomics could detect tumours at the micrometastatic stage, prior to the current clinical gold-standard of blood-brain barrier breakdown. Metastatic mammary carcinoma cells (4T1-GFP) were injected into BALB/c mice via intracerebral, intracardiac or intravenous routes to induce differing cerebral and systemic tumour burdens. B16F10 melanoma and MDA231BR-GFP human breast carcinoma cells were used for additional modelling...
2016: Theranostics
https://www.readbyqxmd.com/read/27920947/the-daniel-k-inouye-college-of-pharmacy-scripts-poha-berry-physalis-peruviana-with-potential-anti-inflammatory-and-cancer-prevention-activities
#5
Leng Chee Chang, Mayuramas Sang-Ngern, John M Pezzuto, Carolyn Ma
The Daniel K. Inouye College of Pharmacy, during a historic event in Spring 2016, graduated the first two students in the Pacific region to earn a PhD in pharmaceutical sciences at the University of Hawai'i at Hilo. The college offers PhD programs in these five disciplines: Cancer Biology, Medicinal Chemistry, Pharmaceutics, Pharmacognosy, and Pharmacology. One of the Pharmacognosy dissertations focused on plant-derived natural products with potential anti-inflammatory and cancer chemopreventive activities...
November 2016: Hawai'i Journal of Medicine & Public Health: a Journal of Asia Pacific Medicine & Public Health
https://www.readbyqxmd.com/read/27920899/diagnosing-clean-margins-through-raman-spectroscopy-in-human-and-animal-mammary-tumour-surgery-a-short-review
#6
REVIEW
I A Birtoiu, C Rizea, D Togoe, R M Munteanu, C Micsa, M I Rusu, M Tautan, L Braic, L O Scoicaru, A Parau, N D Becherescu-Barbu, M V Udrea, A Tonetto, R Notonier, C E A Grigorescu
Breast cancer frequency in human and other mammal female populations has worryingly increased lately. The acute necessity for taxonomy of the aetiological factors along with seeking for new diagnostic tools and therapy procedures aimed at reducing mortality have yielded in an intense research effort worldwide. Surgery is a regular method to counteract extensive development of breast cancer and prevent metastases provided that negative surgical margins are achieved. This highly technical challenge requires fast, extremely sensitive and selective discrimination between malignant and benign tissues even down to molecular level...
December 6, 2016: Interface Focus
https://www.readbyqxmd.com/read/27916966/alpha-and-beta-cyclodextrin-inclusion-complexes-with-5-fluorouracil-characterization-and-cytotoxic-activity-evaluation
#7
Cristina Di Donato, Margherita Lavorgna, Roberto Fattorusso, Carla Isernia, Marina Isidori, Gaetano Malgieri, Concetta Piscitelli, Chiara Russo, Luigi Russo, Rosa Iacovino
Cyclodextrins are natural macrocyclic oligosaccharides able to form inclusion complexes with a wide variety of guests, affecting their physicochemical and pharmaceutical properties. In order to obtain an improvement of the bioavailability and solubility of 5-fluorouracil, a pyrimidine analogue used as chemotherapeutic agent in the treatment of the colon, liver, and stomac cancers, the drug was complexed with alpha- and beta-cyclodextrin. The inclusion complexes were prepared in the solid state by kneading method and characterized by Fourier transform-infrared (FT-IR) spectroscopy and X-ray powder diffractometry...
December 1, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27916791/different-phases-of-breast-cancer-cells-raman-study-of-immortalized-transformed-and-invasive-cells
#8
Deepika Chaturvedi, Sai A Balaji, Vinay Kumar Bn, Freek Ariese, Siva Umapathy, Annapoorni Rangarajan
Breast cancer is the most prevalent cause of cancer-associated death in women the world over, but if detected early it can be treated successfully. Therefore, it is important to diagnose this disease at an early stage and to understand the biochemical changes associated with cellular transformation and cancer progression. Deregulated lipid metabolism has been shown to contribute to cell transformation as well as cancer progression. In this study, we monitored the biomolecular changes associated with the transformation of a normal cell into an invasive cell associated with breast cancer using Raman microspectroscopy...
November 28, 2016: Biosensors
https://www.readbyqxmd.com/read/27916559/rhinacanthin-c-enhances-doxorubicin-cytotoxicity-via-inhibiting-the-functions-of-p-glycoprotein-and-mrp2-in-breast-cancer-cells
#9
Tassarut Chaisit, Pongpun Siripong, Suree Jianmongkol
Rhinacanthin-C is a major bioactive naphthoquinone ester found in Rhinacanthus nasutus Kurz (Acanthaceae). This compound has potential therapeutic value as an anticancer and antiviral agent. In this study, we investigated an enhancement effect of rhinacanthin-C on doxorubicin cytotoxicity in human breast cancer cell lines and the involvement of the ABC drug efflux transporters. The cytotoxicity was determined by an MTT assay. Combination between doxorubicin and rhinacanthin-C at their non-cytotoxic concentrations when giving each compound alone significantly reduced cell viability in MCF-7 and MCF-7/DOX resistant cells...
December 1, 2016: European Journal of Pharmacology
https://www.readbyqxmd.com/read/27905583/intracellular-water-an-overlooked-drug-target-cisplatin-impact-in-cancer-cells-probed-by-neutrons
#10
M P M Marques, A L M Batista de Carvalho, V Garcia Sakai, L Hatter, L A E Batista de Carvalho
The first neutron scattering study on human nucleated cells is reported, addressing the subject of solvent-slaving to a drug by probing intracellular water upon drug exposure. Inelastic and quasi-elastic neutron scattering spectroscopy with isotope labelling was applied for monitoring interfacial water response to the anticancer drug cisplatin, in the low prognosis human metastatic breast cancer cells MDA-MB-231. Optical vibrational data were also obtained for lyophilised cells. Concentration-dependent dynamical changes evidencing a progressive mobility reduction were unveiled between untreated and cisplatin-exposed samples, concurrent with variations in the native organisation of water molecules within the intracellular medium as a consequence of drug action...
December 1, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27895869/assessing-absorption-coefficient-of-hemoglobin-in-the-breast-phantom-using-near-infrared-spectroscopy
#11
Parinaz Mehnati, Maede Jafari Tirtash, Mohammad Sadegh Zakerhamidi, Parisa Mehnati
BACKGROUND: Blood concentrations and oxygen saturation levels are important biomarkers for breast cancer diagnosis. OBJECTIVES: In this study, the absorption coefficient of hemoglobin (Hb) was used to distinguish between normal and abnormal breast tissue. MATERIALS AND METHODS: A near-infrared source (637 nm) was transmitted from major and minor vessels of a breast phantom containing 2×, 4× concentrations of oxy- and deoxy-Hb. The absorption coefficients were determined from spectrometer (SM) and powermeter (PM) data...
October 2016: Iranian Journal of Radiology: a Quarterly Journal Published By the Iranian Radiological Society
https://www.readbyqxmd.com/read/27893436/carbon-nanotubes-as-carriers-of-panax-ginseng-metabolites-and-enhancers-of-ginsenosides-rb1-and-rg1-anti-cancer-activity
#12
Mohamed H Lahiani, Souzan Eassa, Charlette Parnell, Zeid Nima, Anindya Ghosh, Alexandru S Biris, Mariya V Khodakovskaya
A major benefit to nanomaterial based-medicine is the ability to provide nanosized vehicles for sporadic metabolites. Here, we describe how the conjugation of valuable ginseng secondary metabolites (ginsenoside Rb1 or Rg1) with carbon nanotubes (CNT) can enhance their anti-proliferative and anti-cancer effects. Ginsenoside-CNT conjugate (Rb-CNT or Rg-CNT) permitted the ginsenosides to be used at a low dose, yet achieve a higher incidence of cancer killing. We were able to demonstrate that the ginsenoside-CNT conjugate can decrease cell viability up to 62% in breast cancer cells (MCF-7) and enhance antiproliferation of drug-resistant pancreatic cancer cells (PANC-1) by 61%...
January 6, 2017: Nanotechnology
https://www.readbyqxmd.com/read/27888782/effect-of-smoking-cessation-in-saliva-compounds-by-ftir-spectroscopy
#13
Laís Morandini Rodrigues, Taciana Deprá Magrini, Celina Faig Lima, Jaqueline Scholz, Herculano da Silva Martinho, Janete Dias Almeida
INTRODUCTION: Smoking is currently considered one of the biggest risk factors for the development of various diseases and early death. Fourier transform infrared (FTIR) spectroscopy is a valuable tool for analysis of biofluids such as saliva and is considered useful for diagnostic purposes. The aim of this study was to evaluate the effect of smoking cessation on saliva composition by FTIR spectroscopy. METHODS: We analyzed the saliva of participants in two groups: a smoker group made up of 10 chronic smokers and a former smoker group made up of 10 individuals who had stopped smoking...
November 23, 2016: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/27872189/biophysical-evidence-for-intrinsic-disorder-in-the-c-terminal-tails-of-the-egfr-and-her3-receptor-tyrosine-kinases
#14
Theodore R Keppel, Kwabena Sarpong, Elisa M Murray, John Monsey, Jian Zhu, Ron Bose
The EGFR/ErbB family of receptor tyrosine kinases includes oncogenes important in the progression of breast and other cancers and they are targets for many drug development strategies. Each member of the ErbB family possesses a unique, structurally uncharacterized C-terminal tail that plays an important role in autophosphorylation and signal propagation. To determine if these C-terminal tails are intrinsically disordered regions, we conducted a battery of biophysical experiments on the EGFR and HER3 tails. Using hydrogen/deuterium exchange mass spectrometry, we measured the conformational dynamics of intracellular half constructs and compared the tails to the ordered kinase domains...
November 21, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27866619/rhizopus-stolonifer-mediated-biosynthesis-of-biocompatible-cadmium-chalcogenide-quantum-dots
#15
P Mareeswari, J Brijitta, S Harikrishna Etti, C Meganathan, Gobi Saravanan Kaliaraj
We report an efficient method to biosynthesize biocompatible cadmium telluride and cadmium sulphide quantum dots from the fungus Rhizopus stolonifer. The suspension of the quantum dots exhibited purple and greenish-blue luminescence respectively upon UV light illumination. Photoluminescence spectroscopy, X-ray diffraction, and transmission electron microscopy confirms the formation of the quantum dots. From the photoluminescence spectrum the emission maxima is found to be 424 and 476nm respectively. The X-ray diffraction of the quantum dots matches with results reported in literature...
December 2016: Enzyme and Microbial Technology
https://www.readbyqxmd.com/read/27865131/evaluation-of-cellular-uptake-cytotoxicity-and-cellular-ultrastructural-effects-of-heteroleptic-oxidovanadium-iv-complexes-of-salicylaldimines-and-polypyridyl-ligands
#16
Gonzalo Scalese, Isabel Correia, Julio Benítez, Santiago Rostán, Fernanda Marques, Filipa Mendes, António Pedro Matos, João Costa Pessoa, Dinorah Gambino
Searching for prospective vanadium-based drugs for cancer treatment, a new series of structurally related [V(IV)O(L-2H)(NN)] compounds (1-8) was developed. They include a double deprotonated salicylaldimine Schiff base ligand (L-2H) and different NN-polypyridyl co-ligands having DNA intercalating capacity. Compounds were characterized in solid state and in solution. EPR spectroscopy suggests that the NN ligands act as bidentate and bind through both nitrogen donor atoms in an axial-equatorial mode. The cytotoxicity was evaluated in human tumoral cells (ovarian A2780, breast MCF7, prostate PC3)...
November 9, 2016: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/27836600/a-novel-method-for-sensitive-microrna-detection-electropolymerization-based-doping
#17
Merve Kaplan, Tugba Kilic, Gunnur Guler, Jihane Mandli, Aziz Amine, Mehmet Ozsoz
In the proposed study, for the first time, sensitive electrochemical detection of a breast cancer biomarker microRNA (miRNA), mir-21 was achieved via electropolymerized polypyrrole (PPy) modified pencil graphite electrodes (PPy/PGE). The detection of hybridization of electrochemically doped probe miRNA, antimir-21, with its complementary target, mir-21 was monitored by either electrochemical impedance spectroscopy (EIS) via comparison of charge transfer resistance (Rct) values before and after hybridization or by electrochemical reduction signal of an hybridization indicator, Meldola's blue (MDB)...
September 14, 2016: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/27828067/laser-induced-breakdown-spectroscopy-and-acoustic-response-techniques-to-discriminate-healthy-and-cancerous-breast-tissues
#18
Fatemeh Ghasemi, Parviz Parvin, Najme Sadat Hosseini Motlagh, Ahmad Amjadi, Shahriar Abachi
Laser induced breakdown spectroscopy and subsequent acoustic response during microplasma formation are employed to identify cancerous human breast tissues. The characteristic optical emissions identify Ca, Na, and Mg rich species in cancerous tissues compared to those of healthy ones. Furthermore, we show that the characteristic parameters of the microplasma, generated on the unhealthy tissues, are elevated. We report higher decibel audio signals emanating from laser induced microplasma and a subsequent audio blueshift for malignant tissues...
October 10, 2016: Applied Optics
https://www.readbyqxmd.com/read/27818603/synthesis-spectroscopic-characterization-and-anticancer-activity-of-new-10-substituted-1-6-diazaphenothiazines
#19
Beata Morak-Młodawska, Krystian Pluta, Małgorzata Latocha, Małgorzata Jeleń
New phenothiazine derivatives as 10-substituted dipyridothiazines of the 1,6-diazaphenothiazine structure were obtained in the cyclization reaction of 3-amino-3'-nitro-2,2'-dipyridinyl sulfide and 3,3'-dinitro-2,2'-dipyridinyl disulfide, and in the reaction of 2-chloro-3-ntropyridine with sodium 3-amino-2-pyridinethiolate followed by various alkylation and arylation reactions. The reaction of the thiazine ring formation ran via the Smiles rearrangement of the S-N type. As the alkylation reactions could proceed at the thiazine, azine or both nitrogen atoms, the product structure elucidation was based on the 2D NMR (Rotating-frame Overhauser Effect Spectroscopy, Correlated Spectroscopy, Heteronuclear Single Quantum Coherence, and Heteronuclear Multiple Bond Correlation) spectra of the N-methylated product...
2016: Medicinal Chemistry Research
https://www.readbyqxmd.com/read/27812586/large-scale-synthesis-and-structural-analysis-of-a-synthetic-glycopeptide-dendrimer-as-an-anti-cancer-vaccine-candidate
#20
Christelle Ganneau, Catherine Simenel, Emeline Emptas, Tiphanie Courtiol, Yves-Marie Coïc, Cécile Artaud, Edith Dériaud, Frédéric Bonhomme, Muriel Delepierre, Claude Leclerc, Richard Lo-Man, Sylvie Bay
Herein, we report a new process that enables the gram-scale production of a fully synthetic anti-cancer vaccine for human use. This therapeutic vaccine candidate, named MAG-Tn3, is a high-molecular-weight tetrameric glycopeptide encompassing carbohydrate tumor-associated Tn antigen clusters and peptidic CD4(+) T-cell epitopes. The synthetic process involves (i) the stepwise solid-phase assembly of protected amino acids, including the high value-added Tn building blocks with only 1.5 equivalents, (ii) a single isolated intermediate, and (iii) the simultaneous deprotection of 36 hindered protective groups...
November 4, 2016: Organic & Biomolecular Chemistry
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