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Breast spectroscopy

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https://www.readbyqxmd.com/read/29454167/polydopamine-coated-nanocomposites-of-angelica-gigas-nakai-extract-and-their-therapeutic-potential-for-triple-negative-breast-cancer-cells
#1
Suyeong Nam, Song Yi Lee, Jung-Jin Kim, Wie-Soo Kang, In-Soo Yoon, Hyun-Jong Cho
Polydopamine (PD)-coated nanocomposites (NCs) based on the ethanol extract of Angelica gigas Nakai (AGN EtOH ext) were fabricated and evaluated for breast cancer therapy. AGN NCs were prepared using a modified emulsification-solvent evaporation method and were further incubated in dopamine solution (at pH 8.6) to be covered with the PD layer. PD-AGN NCs with a 213-nm mean diameter, narrow size distribution, and negative zeta potential values were fabricated in this study. Less negative (close to zero) zeta potential value of PD-AGN NCs than that of AGN NCs implied the existence of the PD layer in the outer surface of NCs...
February 11, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29454110/study-of-lipid-metabolism-by-estimating-the-fat-fraction-in-different-breast-tissues-and-in-various-breast-tumor-sub-types-by-in-vivo-1-h-mr-spectroscopy
#2
Khushbu Agarwal, Uma Sharma, Sandeep Mathur, Vurthaluru Seenu, Rajinder Parshad, Naranamangalam R Jagannathan
PURPOSE: To evaluate the utility of fat fraction (FF) for the differentiation of different breast tissues and in various breast tumor subtypes using in vivo proton ( 1 H) magnetic resonance spectroscopy (MRS). METHODS: 1 H MRS was performed on 68 malignant, 35 benign, and 30 healthy volunteers at 1.5 T. Malignant breast tissues of patients were characterized into different subtypes based on the differences in the expression of hormone receptors and the FF was calculated...
February 14, 2018: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/29448142/metabolomics-facilitates-the-discrimination-of-the-specific-anti-cancer-effects-of-free-and-polymer-conjugated-doxorubicin-in-breast-cancer-models
#3
Ana Armiñán, Martina Palomino-Schätzlein, Coralie Deladriere, Juan J Arroyo-Crespo, Sonia Vicente-Ruiz, María J Vicent, Antonio Pineda-Lucena
Metabolomics is becoming a relevant tool for understanding the molecular mechanisms involved in the response to new drug delivery systems. The applicability of this experimental approach to cell cultures and animal models makes metabolomics a useful tool for establishing direct connections between in vitro and in vivo data, thus providing a reliable platform for the characterization of chemotherapeutic agents. Herein, we used metabolomic profiles based on nuclear magnetic resonance (NMR) spectroscopy to evaluate the biochemical pathways involved in the response to a chemotherapeutic anthracycline drug (Doxorubicin, Dox) and an N-(2-hydroxypropyl) methacrylamide (HPMA) copolymer-conjugated form (HPMA-Dox) in an in vitro cell culture model and an in vivo orthotopic breast cancer model...
February 8, 2018: Biomaterials
https://www.readbyqxmd.com/read/29447983/three-new-abietane-type-diterpenoids-from-the-leaves-of-indonesian-plectranthus-scutellarioides
#4
Takuya Ito, Senda Kartika Rakainsa, Khoirun Nisa, Hiroyuki Morita
Three new diterpenoids, spiroscutelones A-C (1-3), along with known diterpene 4, were isolated from the leaves of Plectranthus scutellarioides. Their structures were established based on extensive spectroscopic analyses, including MS and NMR spectroscopy. Spiroscutelone A (1) represents the first example of an abietane-type terpenoid skeleton with a cyclobutane moiety linking the B and C rings. Of compounds 1-4, spiroscutelone B (2) exhibited the most potent cytotoxicities against the three tested human cancer lines [breast (MCF-7), pancreatic (PSN-1), and cervical (HeLa)] with IC 50 values ranging from 17...
February 12, 2018: Fitoterapia
https://www.readbyqxmd.com/read/29446732/biomedical-potentialities-of-taraxacum-officinale-based-nanoparticles-biosynthesized-using-methanolic-leaf-extract
#5
Tahir Rasheed, Muhammad Bilal, Chuanlong Li, Hafiz M N Iqbal
BACKGROUND: In the present study, the potential of methanolic leaf extract of Taraxacum officinale plant as a function of bio-inspired green synthesis for the fabrication of silver nanoparticles (AgNPs) has been explored. METHODS: The bio-reduction of aqueous silver nitrate (AgNO3) solution was confirmed by visually detecting the color change from pale yellow to blackish-brown. Maximum absorbance was observed at 420 nm due to the presence of characteristic surface Plasmon resonance of nano silver by UV-visible spectroscopy...
February 14, 2018: Current Pharmaceutical Biotechnology
https://www.readbyqxmd.com/read/29445233/in-vitro-cytotoxicity-activity-of-novel-schiff-base-ligand-lanthanide-complexes
#6
Kavitha Andiappan, Anandhavelu Sanmugam, Easwaramoorthy Deivanayagam, K Karuppasamy, Hyun-Seok Kim, Dhanasekaran Vikraman
A Schiff base ligand (SBL), N 2 , N 3 -bis (anthracen-9-ylmethylene) pyridine-2, 3-diamine, was synthesized through the condensation of 2,6-diaminopyridine and anthracene-9-carbaldehyde using a 1:2 ratio. 1 H NMR spectra confirmed the observation of non-involvement aromatic carboxylic proton in SBL. A novel series of lanthanide (i.e., praseodymium (Pr), erbium (Er), and ytterbium (Yb))-based SBL metal complexes was successfully synthesized, and their functional groups were elaborately demonstrated using UV-visible, Fourier transform infrared (FT-IR), and fluorescence spectroscopy analyses...
February 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29442622/chitosan-stabilized-gold-folate-poly-lactide-co-glycolide-nanoplexes-facilitate-efficient-gene-delivery-in-hepatic-and-breast-cancer-cells
#7
Jude Akinyelu, Moganavelli Singh
The biodegradable polymer, poly(lactide-co-glycolide) is a popular polymer of choice in many nanotherapeutic studies. Herein, we report on the synthesis and evaluation of four chitosan stabilized poly(lactide-co-glycolide) nanoparticles with and without coating with gold, and the targeting ligand, folic acid, as potential non-viral gene delivery vectors. The poly(lactide-co-glycolide) nanoparticles were synthesized via nanoprecipitation/solvent evaporation method in conjunction with the surface functionalizing folic acid and chitosan...
July 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29441953/a-cytotoxic-flavonol-glycoside-from-melaleuca-leucadendra-leaves-extract-with-immunostimulant-activity
#8
A N Hashim, N F Swilam, E S Moustafa, S M Bakry, R M Labib, H H Barakat, A B Singab, M W Linscheid, M A Nawwar
Leaves of Melaleuca leucadendra contain the novel flavonol glycoside, myricetin 3-O-β-4C1-galactopyranuronoid. In addition, known fifteen phenolics were identified. All isolates are characterized for the first time from this plant. Structures were established by conventional methods and confirmed by spectral methods of analysis, including one and two-dimensional nuclear magnetic resonance spectroscopy (1D and 2D-NMR) and high resolution electro-spray ionization mass spectrometry (HRESIMS), as well. Assessment of some immunological and biological efficacy, of the extract in combination with a parallel cytotoxicity evaluation, using the method of cellular reduction of 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) technique was carried out...
January 2, 2018: Die Pharmazie
https://www.readbyqxmd.com/read/29441671/enzymatic-stimuli-responsive-methotrexate-conjugated-magnetic-nanoparticles-for-target-delivery-to-breast-cancer-cells-and-release-study-in-lysosomal-condition
#9
Hamed Nosrati, Amir Mojtahedi, Hossein Danafar, Hamidreza Kheiri Manjili
In this study, magnetic nanoparticles (MNPs) coated with glycine (F-Gly NPs) and conjugated with methotrexate (MTX) (F-Gly-MTX NPs) were synthesized via a co-precipitation method followed by amidation reaction between the carboxylic acid end groups on MTX and the amine groups on the MNPs surface and studied its cytotoxic effect in vitro. The successful conjugating of MTX onto the nanoparticles (NPs) was confirmed by X-ray diffraction (XRD), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), fourier transform infrared spectroscopy (FTIR), vibrating sample magnetometer (VSM) and transmission electron microscopy (TEM) techniques...
February 14, 2018: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29439621/biofluid-metabolomics-in-preterm-birth-research
#10
Ana M Gil, Daniela Duarte
This article presents an account of the research carried out so far in the use of metabolomics to find biomarkers of preterm birth (PTB) in fetal, maternal, and newborn biofluids. Metabolomic studies have employed mainly nuclear magnetic resonance spectroscopy or mass spectrometry-based methodologies to analyze, on one hand, prenatal biofluids (amniotic fluid, maternal urine/maternal blood, cervicovaginal fluid) to identify predictive biomarkers of PTB, and on the other hand, biofluids collected at or after birth (amniotic fluid, umbilical cord blood, newborn urine, and newborn blood, maternal blood, or breast milk) to assess and follow up the health status of PTB babies...
January 1, 2018: Reproductive Sciences
https://www.readbyqxmd.com/read/29436875/synthesis-in-vitro-characterization-and-anti-tumor-effects-of-novel-polystyrene-poly-amide-ether-ester-imide-co-polymeric-micelles-for-delivery-of-docetaxel-in-breast-cancer-in-balb-c-mice
#11
Jaleh Varshosaz, Saeede Enteshari, Farshid Hassanzadeh, Batool Hashemi-Beni, Mohsen Minaiyan, Razieh Mirsafaei
OBJECTIVE: the goal of the present work was to make novel co-polymeric micellar carriers for the delivery of docetaxel (DTX). SIGNIFICANCE: Co-polymeric micelles can not only solubilize DTX and eliminate the need for toxic surfactants to dissolve it, but also cause passive targeting of the drug to the tumor and reduce its toxic side effects. METHODS: Poly (styrene-maleic acid) (SMA) was conjugated to poly (amide-ether-ester-imide)-poly ethylene glycol (PAEEI-PEG)...
February 13, 2018: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/29433206/lycopene-rich-extract-from-red-guava-psidium-guajava-l-displays-cytotoxic-effect-against-human-breast-adenocarcinoma-cell-line-mcf-7-via-an-apoptotic-like-pathway
#12
Raimunda C Dos Santos, Alicia S Ombredane, Jéssica Maria T Souza, Andreanne G Vasconcelos, Alexandra Plácido, Adriany das G N Amorim, Eder Alves Barbosa, Filipe C D A Lima, Cristina D Ropke, Michel M M Alves, Daniel D R Arcanjo, Fernando A A Carvalho, Cristina Delerue-Matos, Graziella A Joanitti, José Roberto de S A Leite
This study investigated a lycopene-rich extract from red guava (LEG) for its chemical composition using spectrophotometry, mass spectrometry, attenuated total reflectance-fourier transform infrared spectroscopy (ATR-FTIR), and computational studies. The cytotoxic activity of LEG and the underlying mechanism was studied in human breast adenocarcinoma cells (MCF-7), murine fibroblast cells (NIH-3T3), BALB/c murine peritoneal macrophages, and sheep blood erythrocytes by evaluating the cell viability with 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) method and flow cytometry...
March 2018: Food Research International
https://www.readbyqxmd.com/read/29433005/cytotoxic-activity-and-structural-features-of-ru-ii-phosphine-amino-acid-complexes
#13
Edjane R Dos Santos, Angelica E Graminha, Mario S Schultz, Isabel Correia, Heloisa S Selistre-de-Araújo, Rodrigo S Corrêa, Javier Ellena, Elisângela de Paula S Lacerda, João Costa Pessoa, Alzir A Batista
Thirteen new ruthenium amino acid complexes were synthesized and characterized. They were obtained by the reaction of α-amino acids (AA) with [RuCl2(P-P)(N-N)], where P-P=1,4-bis(diphenylphosphino)butane (dppb) or 1,3-bis(diphenylphosphino)propane (dppp) and N-N=4,4'-dimethyl-2,2'-bipyridine (4'-Mebipy), 5,5'-dimethyl-2,2'-bipyridine (5'-Mebipy) or 4,4'-Methoxy-2-2'-bipyridine (4'-MeObipy). This afforded a family of complexes formulated as [Ru(AA-H)(P-P)(N-N)]PF6, where AA=glycine (Gly), L-alanine (Ala), L-valine (Val), L-tyrosine (Tyr), L-tryptophan (Trp), L-histidine (His) and L-methionine (Met)...
December 23, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/29429653/sonochemically-synthesized-blue-fluorescent-functionalized-graphene-oxide-as-a-drug-delivery-system
#14
Hamed Hashemi, Hassan Namazi
Ultrasound assisted the copper-catalyzed cross-coupling reaction to synthesis 1-(10-bromoanthracene-9-yl)-1H-imidazole-4,5-dicarboxylic acid (A-Im). The obtained product was employed to modify graphene oxide (GO) surface to produce GO-A-Im. The resulted hybrid was characterized with Scanning Electron Microscope (SEM/EDS); X-ray Diffraction spectroscopy (XRD); X-ray photoelectron spectroscopy (XPS); Fluorescence spectroscopy; Fourier transformed infrared spectroscopy (FT-IR), Brunauer-Emmett-Teller (BET), and UV-Vis absorption spectroscopy...
April 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29427681/in-vitro-activities-of-kappa-carrageenan-isolated-from-red-marine-alga-hypnea-musciformis-antimicrobial-anticancer-and-neuroprotective-potential
#15
Ricardo Basto Souza, Annyta Fernandes Frota, Joana Silva, Celso Alves, Agnieszka Zofia Neugebauer, Susete Pinteus, José Ariévilo Gurgel Rodrigues, Edna Maria Silva Cordeiro, Raimundo Rafael de Almeida, Rui Pedrosa, Norma Maria Barros Benevides
This study assessed the antioxidant, antimicrobial, cytotoxic, anticancer and neuroprotective activities of the kappa(k)-carrageenan isolated from the red alga Hypnea musciformis (Hm-SP). As expected, the chemical spectrum of the k-carrageenan from Hm-SP was confirmed by Fourier transform infrared (FT-IR) spectroscopy. Hm-SP revealed an antibacterial and antifungal action against Staphylococcus aureus and Candida albicans, respectively. Hm-SP did not promoted cytotoxic effects against Human breast cancer (MCF-7) and Human neuroblastoma (SH-SY5Y)...
February 7, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29426684/fat-necrosis-of-the-breast-magnetic-resonance-imaging-characteristics-and-pathologic-correlation
#16
Hebatallah Hassan Mamdouh Hassan, Amr Magdi El Abd, Amany Abdel Bary, Nagy N N Naguib
RATIONALE AND OBJECTIVES: This study aims to describe the magnetic resonance imaging (MRI) features of fat necrosis on magnetic resonance mammography, which may downstage a suspicious lesion to a merely benign finding. MATERIALS AND METHODS: This prospective study included 82 female patients (mean age 50 years) who were diagnosed to have suspicious lesions by mammography, ultrasonography or both. All patients underwent MRI including diffusion-weighted imaging and spectroscopy...
February 7, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29426245/albumin-coated-cadmium-nanoparticles-as-chemotherapeutic-agent-against-mda-mb-231-human-breast-cancer-cell-line
#17
Marzieh Azizi, Hedayatollah Ghourchian, Fatemeh Yazdian, Hojjat Alizadehzeinabad
With the aim of dedicating toxicity of cadmium nanoparticles (CdNPs) against invasive breast cancer, with minimum damage to surrounding healthy cells, CdNPs were coated with albumin nanocarrier by nanoprecipitation method and named CdNPs@BSA. The characterization was done by TEM image, DLS and UV-Vis, fluorescence, circular dichroism spectroscopy. The cytotoxic efficacy of the CdNPs@BSA against human breast cancer cells (MDA-MB 231 cells) was examined by MTT assay. Apoptosis, as the mechanism of cell death, was verified by inverted microscopy, fluorescent microscopy, gel electrophoresis and flow cytometry...
February 9, 2018: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29413692/the-molecular-cues-for-the-biological-effects-of-ionizing-radiation-dose-and-post-irradiation-time-on-human-breast-cancer-skbr3-cell-line-a-raman-spectroscopy-study
#18
Naser Jafarzadeh, Ahmad Mani-Varnosfaderani, Kambiz Gilany, Samira Eynali, Habib Ghaznavi, Ali Shakeri-Zadeh
Radiotherapy is one of the main modalities of cancer treatment. The utility of Raman spectroscopy (RS) for detecting the distinct radiobiological responses in human cancer cells is currently under investigation. RS holds great promises to provide good opportunities for personalizing radiotherapy treatments. Here, we report the effects of the radiation dose and post-irradiation time on the molecular changes in the human breast cancer SKBR3 cells, using RS. The SKBR3 cells were irradiated by gamma radiation with different doses of 0, 1, 2, 4, and 6 Gy...
January 25, 2018: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29400411/design-synthesis-and-biological-evaluation-of-novel-1-2-diaryl-4-substituted-benzylidene-5-4h-imidazolone-derivatives-as-cytotoxic-agents-and-cox-2-lox-inhibitors
#19
Phoebe F Lamie, John N Philoppes, Lucie Rárová
A new series of 1,2-diaryl-4-substituted-benzylidene-5(4H)-imidazolone derivatives 4a-l was synthesized. Their structures were confirmed by different spectroscopic techniques (IR, 1 H NMR, DEPT-Q NMR, and mass spectroscopy) and elemental analyses. Their cytotoxic activities in vitro were evaluated against breast, ovarian, and liver cancer cell lines and also normal human skin fibroblasts. Cyclooxygenase (COX)-1, COX-2 and lipoxygenase (LOX) inhibitory activities were measured. The synthesized compounds showed selectivity toward COX-2 rather than COX-1, and the IC50 values (0...
February 5, 2018: Archiv der Pharmazie
https://www.readbyqxmd.com/read/29397734/unique-features-of-metformin-a-combined-experimental-theoretical-and-simulation-study-of-its-structure-dynamics-and-interaction-energetics-with-dna-grooves
#20
Sayantan Mondal, Rudra Narayan Samajdar, Saumyak Mukherjee, Aninda Jiban Bhattacharyya, Biman Bagchi
There are certain small molecules that exhibit extraordinarily diverse biological activities. Metformin is one of them. It is widely used as anti-diabetic drug for type-two diabetes. Recent evidences of its role in anti-tumour activities and increasing the survival rates of cancer patients (namely colorectal, breast, pancreas and prostate cancer) are emerging. However, theoretical studies of structure and dynamics of metformin have not yet been fully explored. In this work, we investigate the characteristic structural and dynamical features of three mono-protonated forms of metformin hydrochloride with the help of experiments, quantum chemical calculations and atomistic molecular dynamics simulations...
February 3, 2018: Journal of Physical Chemistry. B
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