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Breast spectroscopy

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https://www.readbyqxmd.com/read/28225252/luminescent-re-i-carbonyl-complexes-as-trackable-photocorms-for-co-delivery-to-cellular-targets
#1
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/28223120/supramolecular-formulation-of-nitidine-chloride-can-alleviate-its-hepatotoxicity-and-improve-its-anticancer-activity
#2
Wanying Li, Hang Yin, David Bardelang, Jianbo Xiao, Ying Zheng, Ruibing Wang
Nitidine chloride (NC) has demonstrated promising anticancer activity. However, NC has also shown non-specific toxicity in various healthy organs such as the liver. In this study, we aimed to develop a supramolecular formulation for NC and investigate the associated benefits of such a supramolecular formulation on modulating its inherent hepatotoxicity and anticancer activity. The formation of NC-cucurbit[7]uil (NC@CB[7]) complexes was characterized by (1)H nuclear magnetic resonance and Fourier transform infrared spectroscopy, differential scanning calorimetry and powder X-ray diffraction analysis...
February 18, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28214620/water-soluble-multifunctional-antibody-porphyrin-gold-nanoparticles-for-targeted-photodynamic-therapy
#3
Oriol Penon, María J Marín, David A Russell, Lluïsa Pérez-García
Photodynamic therapy (PDT) is a treatment of cancer by which tumour cells are destroyed using reactive oxygen species produced by photosensitizers following activation with visible or near infrared light. Successful PDT depends on the solubility and the targeting ability of the photosensitizers. In this work, the synthesis of a porphyrin-based water soluble nanoparticle conjugate containing a targeting agent that recognizes the erbB2 receptor overexpressed on the surface of particular cancer cells is reported...
February 8, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28213264/a-novel-electrochemical-biosensor-based-on-polyadenine-modified-aptamer-for-label-free-and-ultrasensitive-detection-of-human-breast-cancer-cells
#4
Kun Wang, Meng-Qi He, Fu-Heng Zhai, Rong-Huan He, Yong-Liang Yu
Simple, rapid, sensitive, and specific detection of cancer cells plays a pivotal role in the diagnosis and prognosis of cancer. A sandwich electrochemical biosensor was developed based on polyadenine (polydA)-aptamer modified gold electrode (GE) and polydA-aptamer functionalized gold nanoparticles/graphene oxide (AuNPs/GO) hybrid for the label-free and selective detection of breast cancer cells (MCF-7) via a differential pulse voltammetry (DPV) technique. Due to the intrinsic affinity between multiple consecutive adenines of polydA sequences and gold, polydA modified aptamer instead of thiol terminated aptamer was immobilized on the surface of GE and AuNPs/GO...
May 1, 2017: Talanta
https://www.readbyqxmd.com/read/28206760/nano-engineered-eggshell-silver-tailored-co-polyester-polymer-blend-film-with-antimicrobial-properties
#5
Boniface J Tiimob, Gregory Mwinyelle, Woubit Abdela, Temesgen Samuel, Shaik Jeelani, Vijaya K Rangari
In this study, the reinforcement effect of different proportions of eggshell/silver nanomaterial (ES-Ag) on structural and antimicrobial properties of 70/30 poly (butylene-co-adipate terephthalate)/polylactic acid (PBAT/PLA) immiscible blends were investigated. The ES-Ag was synthesized using a single step ball milling process, and characterized with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). These results confirmed the existence of silver nanoparticles (Ag NPs) in the interstitial spaces of the eggshell particles...
February 16, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28202527/-18f-2s-4r-4-fluoroglutamine-pet-detects-glutamine-pool-size-changes-in-triple-negative-breast-cancer-in-response-to-glutaminase-inhibition
#6
Rong Zhou, Austin R Pantel, Shihong Li, Brian P Lieberman, Karl Ploessl, Hoon Choi, Eric Blankemeyer, Hsiaoju Lee, Hank Kung, Robert H Mach, David Mankoff
Glutaminolysis is a metabolic pathway adapted by many aggressive cancers, including triple-negative breast cancers (TNBC), to utilize glutamine for survival and growth. In this study, we examined the utility of [18F](2S,4R)4-fluoroglutamine ([18F]4F-Gln) PET to measure tumor cellular glutamine pool size, whose change might reveal the pharmacodynamic (PD) effect of drugs targeting this cancer-specific metabolic pathway. High glutaminase (GLS) activity in TNBC tumors resulted in low cellular glutamine pool size assayed via high-resolution 1H magnetic resonance spectroscopy (MRS)...
February 15, 2017: Cancer Research
https://www.readbyqxmd.com/read/28198437/increased-nutrient-availability-in-dense-breast-tissue-of-postmenopausal-women-in-vivo
#7
Annelie Abrahamsson, Anna Rzepecka, Charlotta Dabrosin
Metabolic reprogramming is a hallmark of cancer. Nutrient availability in the tissue microenvironment determines cellular events and may play a role in breast carcinogenesis. High mammographic density is an independent risk factor for breast cancer. Whether nutrient availability differs in normal breast tissues with various densities is unknown. Therefore we investigated whether breast tissues with various densities exhibited differences in nutrient availability. Healthy postmenopausal women from the regular mammographic screening program who had either predominantly fatty breast tissue (nondense), n = 18, or extremely dense breast tissue (dense), n = 20, were included...
February 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28195406/synthesis-biological-evaluations-and-molecular-docking-studies-on-dna-binding-interaction-of-platinum-ii-rollover-complexes-containing-phosphorus-donor-ligands
#8
Masood Fereidoonnezhad, Maryam Niazi, Mahnaz Shahmohammadi Beni, Shima Mohammadi, Zeinab Faghih, Zahra Faghih, Hamid R Shahsavari
A series of cyclometalated rollover complexes [PtMe(κ²N,C-bipyO-H)(L)], 2a-2c, bipyO-H = cyclometalated 2,2'-bipyridine N-oxide, L = PCy₃ (2a), PPh₂py (2-(diphenylphosphino)pyridine, 2b), P(OPh)₃ (2c), was synthesized by reacting of complex [PtMe(κ²N,C-bipyO-H)(SMe₂)], 1, with various monodentate phosphine and phosphite ligands. These complexes were characterized by means of NMR spectroscopy and the structures of 2a confirmed by single-crystal X-ray diffraction. 1 was treated with bis(diphenylphosphino)methane (dppm) in a 1 : 1 ratio to give corresponding complex [PtMe(κ²N,C-bipyO-H)(η¹P-dppm)], 3b, in which dppm ligand acts as a monodentate pendant ligand...
February 14, 2017: ChemMedChem
https://www.readbyqxmd.com/read/28188108/magnetic-resonance-spectroscopy-detected-change-in-marrow-adiposity-is-strongly-correlated-to-postmenopausal-breast-cancer-risk
#9
Guanwu Li, Zheng Xu, Alex Zhuang, Shixin Chang, Lingmi Hou, Yongsheng Chen, Maki Polat, Dongmei Wu
PURPOSE: To determine whether marrow fat fraction (FF) is correlated with postmenopausal breast cancer risk and clinicopathological characteristics of breast cancer. METHODS: Fifty-six patients with newly diagnosed and histologically confirmed postmenopausal breast cancer and 56 healthy controls underwent serologic test and magnetic resonance spectroscopy-based FF measurements. Data were analyzed by logistic multivariate regression models to determine the independent predictors of breast cancer risk and clinicopathological characters of breast cancer...
January 18, 2017: Clinical Breast Cancer
https://www.readbyqxmd.com/read/28181469/differences-and-relationships-between-normal-and-atypical-ductal-hyperplasia-ductal-carcinoma-in-situ-and-invasive-ductal-carcinoma-tissues-in-the-breast-based-on-raman-spectroscopy
#10
Bing Han, Ye Du, Ton Fu, Zhimin Fan, Shuping Xu, Chengxu Hu, Lirong Bi, Ting Gao, Haipeng Zhang, Weiqing Xu
The aim of this study was to find the differences and relationships between normal, atypical ductal hyperplasia (ADH), ductal carcinoma in situ (DCIS), and invasive ductal carcinoma (IDC) lesions of the breast based on biochemical characteristics determined by Raman spectroscopy (RS). After collecting 39 frozen sections from patients who underwent surgical resection or mammotome biopsy, nine normal tissues, seven ADH, eight DCIS, and 15 IDC lesions were detected using confocal RS. We then used leave-one-out cross-validation (LOOCV) and radial basis function (RBF) to build a support vector machine (SVM) diagnosis model...
February 2017: Applied Spectroscopy
https://www.readbyqxmd.com/read/28168160/insights-into-biochemical-alteration-in-cancer-associated-fibroblasts-by-using-novel-correlative-spectroscopy
#11
Saroj Kumar, Xia Liu, Ferenc Borondics, Qunfeng Xiao, Renfei Feng, Erik Goormaghtigh, Fredrik Nikolajeff
The microenvironment of a tumor changes chemically and morphologically during cancer progression. Cancer-stimulated fibroblasts promote tumor growth, however, the mechanism of the transition to a cancer-stimulated fibroblast remains elusive. Here, the multi-modal spectroscopic methods Fourier transform infrared imaging (FTIRI), X-ray absorption spectroscopy (XAS) and X-ray fluorescence imaging (XFI) are used to characterize molecular and atomic alterations that occur in cancer-stimulated fibroblasts. In addition to chemical changes in lipids (olefinic and acyl chain) and protein aggregation observed with FTIRI, a new infrared biomarker for oxidative stress in stimulated fibroblasts is reported...
February 2017: ChemistryOpen
https://www.readbyqxmd.com/read/28166807/non-invasive-optical-spectroscopic-monitoring-of-breast-development-during-puberty
#12
Lothar Lilge, Mary Beth Terry, Jane Walter, Dushanthi Pinnaduwage, Gord Glendon, Danielle Hanna, Mai-Liis Tammemagi, Angela Bradbury, Saundra Buys, Mary Daly, Esther M John, Julia A Knight, Irene L Andrulis
BACKGROUND: Tanner staging (TS), a five-stage classification indicating no breast tissue (TS1) to full breast development (TS5), is used both in health research and clinical care to assess the onset of breast development (TS2) and duration in each stage. Currently, TS is measured both visually and through palpation but non-invasive methods will improve comparisons across settings. METHODS: We used optical spectroscopy (OS) measures from 102 girls at the Ontario site of the LEGACY girls study (average age 12 years, range 10...
February 6, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/28160560/exosome-secretome-and-mediated-signaling-in-breast-cancer-patients-with-nontuberculous-mycobacterial-disease
#13
Julie V Philley, Anbarasu Kannan, David E Griffith, Megan S Devine, Jeana L Benwill, Richard J Wallace Jr, Barbara A Brown-Elliott, Foram Thakkar, Varsha Taskar, James G Fox, Ammar Alqaid, Hernaina Bains, Sudeep Gupta, Santanu Dasgupta
Bronchiectasis Nontuberculous mycobacterium (NTMnb) infection is an emerging health problem in breast cancer (BCa) patients. We measured sera exosome proteome in BCa-NTMnb subjects and controls by Mass Spectroscopy. Extracellular matrix protein 1 (ECM1) was detected exclusively in the circulating exosomes of 82% of the BCa-NTMnb cases. Co-culture of ECM1+ exosomes with normal human mammary epithelial cells induced epithelial to mesenchymal transition accompanied by increased Vimentin/CDH1 expression ratio and Glutamate production...
February 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/28157707/near-infrared-fluorescent-imaging-of-choline-kinase-alpha-expression-and-inhibition-in-breast-tumors
#14
Sean P Arlauckas, Manoj Kumar, Anatoliy V Popov, Harish Poptani, Edward J Delikatny
Choline kinase alpha (ChoKα) overexpression is associated with an aggressive tumor phenotype. ChoKα inhibitors induce apoptosis in tumors, however validation of their specificity is difficult in vivo. We report the use of optical imaging to assess ChoKα status in cells and in vivo using JAS239, a carbocyanine-based ChoKα inhibitor with inherent near infrared fluorescence. JAS239 attenuated choline phosphorylation and viability in a panel of human breast cancer cell lines. Antibody blockade prevented cellular retention of JAS239 indicating direct interaction with ChoKα independent of the choline transporters and catabolic choline pathways...
February 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/28147234/antimicrobial-and-anticancer-activities-of-porous-chitosan-alginate-biosynthesized-silver-nanoparticles
#15
Jayachandran Venkatesan, Jin-Young Lee, Dong Seop Kang, Sukumaran Anil, Se-Kwon Kim, Min Suk Shim, Dong Gyu Kim
The main aim of this study was to obtain porous antimicrobial composites consisting of chitosan, alginate, and biosynthesized silver nanoparticles (AgNPs). Chitosan and alginate were used owing to their pore-forming capacity, while AgNPs were used for their antimicrobial property. The developed porous composites of chitosan-alginate-AgNPs were characterized using Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible spectroscopy, X-ray diffraction (XRD) analysis, and scanning electron microscopy (SEM)...
January 29, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28145887/organ-specific-isogenic-metastatic-breast-cancer-cell-lines-exhibit-distinct-raman-spectral-signatures-and-metabolomes
#16
Paul T Winnard, Chi Zhang, Farhad Vesuna, Jeon Woong Kang, Jonah Garry, Ramachandra Rao Dasari, Ishan Barman, Venu Raman
Molecular characterization of organ-specific metastatic lesions, which distinguish them from the primary tumor, will provide a better understanding of tissue specific adaptations that regulate metastatic progression. Using an orthotopic xenograft model, we have isolated isogenic metastatic human breast cancer cell lines directly from organ explants that are phenotypically distinct from the primary tumor cell line. Label-free Raman spectroscopy was used and informative spectral bands were ascertained as differentiators of organ-specific metastases as opposed to the presence of a single universal marker...
January 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28144768/variation-of-human-milk-glucocorticoids-over-24%C3%A2-hour-period
#17
Shikha Pundir, Clare R Wall, Cameron J Mitchell, Eric B Thorstensen, Ching T Lai, Donna T Geddes, David Cameron-Smith
Human milk (HM) contains a complex array of hormones, including members of the glucocorticoid family. The predominant glucocorticoids, cortisol and cortisone may influence the growth and behaviour of the breastfed infant. However, little is understood of the factors regulating the levels of these hormones within HM. The aim of the study was to examine HM cortisol and cortisone concentration, measured in samples collected at each feed during a 24 hour period. Twenty three exclusively breastfeeding mothers collected milk, prior to and after each breastfeeding session over 24 hour period at 3...
January 31, 2017: Journal of Mammary Gland Biology and Neoplasia
https://www.readbyqxmd.com/read/28129886/diverse-tritepenoids-from-the-fruits-of-walsura-robusta-and-their-reversal-of-multidrug-resistance-phenotype-in-human-breast-cancer-cells
#18
Yao Zhang, Fa-Liang An, Shan-Shan Huang, Lei Yang, Yu-Cheng Gu, Jun Luo, Ling-Yi Kong
Four 18 (13 → 14)-abeo limonoids, five cedrelone limonoids, and five walsurin limonoids were isolated from the fruits of Walsura robusta together with 21 known compounds. Their structures were determined by extensive studies of their one- and two-dimensional NMR spectra and mass spectroscopy results. Among all the isolated compounds, the absolute configurations of 11-oxo-dihydrocedrelone, walsuronoid B, dysoxylumosin G, and walsunoid H were confirmed by single crystal X-ray diffraction. Selected compounds were evaluated for their reversal of multidrug resistance (MDR) phenotype in human breast cancer cells in vitro...
January 24, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28121948/bioimpedance-spectroscopy-can-precisely-discriminate-human-breast-carcinoma-from-benign-tumors
#19
Zhenggui Du, Hangyu Wan, Yu Chen, Yang Pu, Xiaodong Wang
Intraoperative frozen pathology is critical when a breast tumor is not diagnosed before surgery. However, frozen tumor tissues always present various microscopic morphologies, leading to a high misdiagnose rate from frozen section examination. Thus, we aimed to identify breast tumors using bioimpedance spectroscopy (BIS), a technology that measures the tissues' impedance. We collected and measured 976 specimens from breast patients during surgery, including 581 breast cancers, 190 benign tumors, and 205 normal mammary gland tissues...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28115262/biological-therapeutics-of-pongamia-pinnata-coated-zinc-oxide-nanoparticles-against-clinically-important-pathogenic-bacteria-fungi-and-mcf-7-breast-cancer-cells
#20
Balasubramanian Malaikozhundan, Baskaralingam Vaseeharan, Sekar Vijayakumar, Karuppiah Pandiselvi, Mohamed Ali Rajamohamed Kalanjiam, Kadarkarai Murugan, Giovanni Benelli
The overuse of antimicrobics and drugs has led to the development of resistance in a number of pathogens and parasites, which leads to great concerns for human health and the environment. Furthermore, breast cancer is the second most common cause of cancer death in women. MCF-7 is a widely used epithelial cancer cell line, derived from breast adenocarcinoma for in vitro breast cancer studies, since the cell line has retained several ideal characteristics particular to the mammary epithelium. In this scenario, the development of novel and eco-friendly drugs are of timely importance...
January 20, 2017: Microbial Pathogenesis
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