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Breast spectroscopy

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https://www.readbyqxmd.com/read/29673982/synthesis-of-some-novel-dimethine-bis-dimethine-cyanine-dyes-and-octacosamethine-cyanine-dyes-endowed-with-promising-biological-potency-against-hepg2-hela-mcf-7-mia-sn12c-and-h358-cell-lines
#1
Rasha E El-Mekawy, A A Fadda
Successfully, one step two component synthesis of dimethine cyanine dyes, bis-dimethine cyanine dyes and icosamethine cyanine dyes 2-10via reaction of pyridinium salt 1 with some different aldehydes hope to obtain these compounds with enhanced biological potency as antitumor agents against spontaneous liver (HepG2), cervical (Hela), breast (MCF-7), pancreas (MIA), kidney (SN12C) and lung (H358). The impact of substituted drugs on the tumor cells was reflected by means of structure activity relationship (SAR)...
April 12, 2018: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29672776/postoperative-monitoring-of-free-diep-flap-in-breast-reconstruction-with-near-infrared-spectroscopy-variables-affecting-the-regional-oxygen-saturation
#2
Marzia Salgarello, Domenico Pagliara, Marco Rossi, Giuseppe Visconti, Liliana Barone-Adesi
BACKGROUND:  The timing of surgical reexploration in microanastomotic thrombosis is directly related to the salvage rate of free flap. Near-infrared spectroscopy (NIRS) is a noninvasive technique, which allows a continuous bedside monitoring of flap oxygenation. The current literature is lacking in the assessment of variables able to modify the NIRS monitoring. The aim of this study is to identify patient and flap-related variables that can affect regional oxygen saturation (rSO2 )...
April 19, 2018: Journal of Reconstructive Microsurgery
https://www.readbyqxmd.com/read/29667293/enhanced-in-vitro-biocompatibility-and-water-dispersibility-of-magnetite-and-cobalt-ferrite-nanoparticles-employed-as-ros-formation-enhancer-in-radiation-cancer-therapy
#3
Stefanie Klein, Melek Kızaloğlu, Luis Portilla, Hyoungwon Park, Tobias Rejek, Julian Hümmer, Karsten Meyer, Rainer Hock, Luitpold V R Distel, Marcus Halik, Carola Kryschi
Efficient magnetic reactive oxygen species (ROS) formation enhancing agents after X-ray treatment are realized by functionalizing superparamagnetic magnetite (Fe3 O4 ) and Co-ferrite (CoFe2 O4 ) nanoparticles with self-assembled monolayers (SAMs). The Fe3 O4 and CoFe2 O4 nanoparticles are synthesized using Massart's coprecipitation technique. Successful surface modification with the SAM forming compounds 1-methyl-3-(dodecylphosphonic acid) imidazolium bromide, or (2-{2-[2-hydroxy-ethoxy]-ethoxy}-ethyl phosphonic acid provides biocompatibility and long-term stability of the Fe3 O4 and CoFe2 O4 nanoparticles in cell media...
April 18, 2018: Small
https://www.readbyqxmd.com/read/29665274/combining-multiplex-sers-nanovectors-and-multivariate-analysis-for-in-situ-profiling-of-circulating-tumor-cell-phenotype-using-a-microfluidic-chip
#4
Yizhi Zhang, Zhuyuan Wang, Lei Wu, Shenfei Zong, Binfeng Yun, Yiping Cui
Isolating and in situ profiling the heterogeneous molecular phenotype of circulating tumor cells are of great significance for clinical cancer diagnosis and personalized therapy. Herein, an on-chip strategy is proposed that combines size-based microfluidic cell isolation with multiple spectrally orthogonal surface-enhanced Raman spectroscopy (SERS) analysis for in situ profiling of cell membrane proteins and identification of cancer subpopulations. With the developed microfluidic chip, tumor cells are sieved from blood on the basis of size discrepancy...
April 17, 2018: Small
https://www.readbyqxmd.com/read/29663927/encapsulation-of-5-flurouracil-into-plga-nanofibers-and-enhanced-anticancer-effect-in-combination-with-ajwa-dates-extract-phoenix-dactylifera-l
#5
Fazal Khan, Musab Aldhahri, Mohammad Asif Hussain, Kalamegam Gauthaman, Adnan Memic, Adel Abuzenadah, Taha Kumosani, Elie Barbour, Nazeeh Shuja Alothmany, Rabah Wasil Aldhaheri
Side effects connected with chemotherapeutic agents used in cancer treatment has led to alternative modalities of combinatorial therapies in an attempt to reduce the drug dosage and associated risks. In the current study we evaluated the potential use of Ajwa Dates Extract (ADE), reported to have anti-cancer effects, as an adjuvant therapy in combination with 5-flurouracil (5FU) against the human-breast-adenocarcinoma cell line (MFC-7) in vitro. The effects of ADE alone and in combination with 5-FU were evaluated in terms of cell viability and cytotoxicity...
March 1, 2018: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/29659077/total-choline-quantification-measured-by-1h-mr-spectroscopy-as-early-predictor-of-response-after-neoadjuvant-treatment-for-locally-advanced-breast-cancer-the-impact-of-immunohistochemical-status
#6
Stylianos Drisis, Patrick Flamen, Michael Ignatiadis, Thierry Metens, Shih-Li Chao, Marie Chintinne, Marc Lemort
BACKGROUND: Validation of new biomarkers is essential for the early evaluation of neoadjuvant treatments. PURPOSE: To determine whether measurements of total choline (tCho) by 1H spectroscopy could predict morphological or pathological complete response (pCR) of neoadjuvant treatment and whether breast cancer subgroups are related to prediction accuracy. STUDY TYPE: Prospective, nonrandomized, monocentric, diagnostic study. POPULATION: Sixty patients were initially included with 39 women participating in the final cohort...
April 16, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29656881/fundamentals-of-functional-imaging-i-current-clinical-techniques
#7
A Luna, T Martín Noguerol, L Alcalá Mata
Imaging techniques can establish a structural, physiological, and molecular phenotype for cancer, which helps enable accurate diagnosis and personalized treatment. In recent years, various imaging techniques that make it possible to study the functional characteristics of tumors quantitatively and reproducibly have been introduced and have become established in routine clinical practice. Perfusion studies enable us to estimate the microcirculation as well as tumor angiogenesis and permeability using ultrafast dynamic acquisitions with ultrasound, computed tomography, or magnetic resonance (MR) imaging...
April 12, 2018: Radiología
https://www.readbyqxmd.com/read/29656660/cytotoxic-flavonoids-from-two-lonchocarpus-species
#8
Fozia A Adem, Victor Kuete, Armelle T Mbaveng, Matthias Heydenreich, Andreas Koch, Albert Ndakala, Beatrice Irungu, Abiy Yenesew, Thomas Efferth
A new isoflavone, 4'-prenyloxyvigvexin A (1) and a new pterocarpan, (6aR,11aR)-3,8-dimethoxybitucarpin B (2) were isolated from the leaves of Lonchocarpus bussei and the stem bark of Lonchocarpus eriocalyx, respectively. The extract of L. bussei also gave four known isoflavones, maximaisoflavone H, 7,2'-dimethoxy-3',4'-methylenedioxyisoflavone, 6,7,3'-trimethoxy-4',5'-methylenedioxyisoflavone, durmillone; a chalcone, 4-hydroxylonchocarpin; a geranylated phenylpropanol, colenemol; and two known pterocarpans, (6aR,11aR)-maackiain and (6aR,11aR)-edunol...
April 16, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29649635/co-delivery-of-docetaxel-and-gemcitabine-by-anacardic-acid-modified-self-assembled-albumin-nanoparticles-for-effective-breast-cancer-management
#9
Varun Kushwah, Sameer S Katiyar, Chander Parkash Dora, Ashish Kumar Agrawal, Dimitrios A Lamprou, Ramesh C Gupta, Sanyog Jain
In the present study, we have modified bovine serum albumin (BSA) by covalently conjugating with anacardic acid (AA) and gemcitabine (GEM) and further used for development of docetaxel (DTX) loaded nanoparticles (AA-GEM-BSA NPs). AA is supposed to provide tumor targeting through VEGF receptors overexpressed in tumors, while the combination of GEM and DTX is supposed to provide synergistic activity by targeting multiple pathways. The conjugate was synthesized via carbodiimide chemistry and characterized by 1 H NMR, FTIR, MALDI-TOF and elemental analysis...
April 9, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29629144/label-free-raman-spectroscopy-provides-early-determination-and-precise-localization-of-breast-cancer-colonized-bone-alterations
#10
Chi Zhang, Paul T Winnard, Sidarth Dasari, Scott L Kominsky, Michele Doucet, Swaathi Jayaraman, Venu Raman, Ishan Barman
Breast neoplasms frequently colonize bone and induce development of osteolytic bone lesions by disrupting the homeostasis of the bone microenvironment. This degenerative process can lead to bone pain and pathological bone fracture, a major cause of cancer morbidity and diminished quality of life, which is exacerbated by our limited ability to monitor early metastatic disease in bone and assess fracture risk. Spurred by its label-free, real-time nature and its exquisite molecular specificity, we employed spontaneous Raman spectroscopy to assess and quantify early metastasis driven biochemical alterations to bone composition...
January 21, 2018: Chemical Science
https://www.readbyqxmd.com/read/29627893/fabrication-of-an-immunosensor-for-early-and-ultrasensitive-determination-of-human-tissue-plasminogen-activator-tpa-in-myocardial-infraction-and-breast-cancer-patients
#11
Haidar Saify Nabiabad, Khosro Piri, Fatemeh Kafrashi, Abbas Afkhami, Tayyebeh Madrakian
Sensitive detection of biomarkers will mean accurate and early diagnosis of diseases. A tissue plasminogen activator (tPA) has a crucial role in many cardiovascular diseases and it is related to many processes such as angiogenesis in cancer cells. Therefore, sensitive determination of tPA is important in diagnosis and clinical research. tPA monoclonal antibody was covalently attached onto single-wall carbon nanotubes (SWCNTs) using diimide-activated imidation coupling. Functionalized SWCNTs were immobilized onto a glassy carbon electrode and the modification process was investigated by sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE), SEM, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS)...
April 7, 2018: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/29625387/urinary-phthalate-metabolite-concentrations-in-girls-with-premature-thelarche
#12
Erdem Durmaz, Pinar Erkekoglu, Ali Asci, Sema Akçurin, İffet Bircan, Belma Kocer-Gumusel
In girls, breast development before eight years of age is called "premature thelarche (PT)". There are few studies in literature that show the interaction between PT and phthalate exposure. The aim of this study was to determine the urinary levels of di-(2-ethylhexyl) phthalate (DEHP) metabolites and other phthalate metabolites in girls with PT. PT group consisted of 29 newly diagnosed subjects. Control group comprised of healthy age-matched girls (n = 25). Urinary phthalate metabolite concentrations were measured by liquid chromatography/tandem mass spectroscopy (LC-MS/MS)...
March 17, 2018: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/29621501/an-innovative-immunoassay-for-ultrasensitive-detection-of-breast-cancer-specific-carbohydrate-ca-15-3-in-unprocessed-human-plasma-and-mcf-7-breast-cancer-cell-lysates-using-gold-nanospear-electrochemically-assembled-onto-thiolated-graphene-quantum-dots
#13
Mohammad Hasanzadeh, Solmaz Tagi, Elham Solhi, Ahad Mokhtarzadeh, Nasrin Shadjou, Aziz Eftekhari, Soltanali Mahboob
The accurate quantification of the level of breast cancer specific protein CA 15-3 in serum is crucial for cancer prognosis. This work, a novel and sensitive label-free immunoassay based on gold nanospear (Au NSs) electrochemically assembled onto thiolated graphene quantum dots (CysA/GQDs) for the detection of CA 15-3 antibodies. The CysA/Au NSs/GQDs hybrid interface provides a large surface area for the effective immobilization of CA 15-3 antigens, as well as it ascertains the bioactivity and stability of immobilized CA 15-3 antigens...
April 2, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29593174/cytotoxic-lathyrane-type-diterpenes-from-seeds-of-euphorbia-lathyris
#14
Jia-Xi Wang, Qian Wang, Yong-Qi Zhen, Shuang-Mei Zhao, Feng Gao, Xian-Li Zhou
We isolated two new lathyrane-type diterpenes L27 (1) and L28 (2) along with seven known compounds (3-9) from the seeds of Euphorbia Lathyris. These compounds were identified by nuclear magnetic resonance (NMR), high-resolution electrospray ionisation mass spectrometry (HR-ESI-MS) as well as infrared spectroscopy (IR). Compounds 1 and 2 were assigned NMR spectrums with1 HNMR,13 CNMR, DEPT, COSY, HMQC, HMBC and NOESY.  Stereo configuration of 1 and 2 were confirmed by comprehensive interpretation of their NOE relationship and showed they were first natural lathyrane-type diterpenes possessing α-configuration substitutes at C-3...
March 27, 2018: Chemical & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/29589914/unravelling-the-metabolic-progression-of-breast-cancer-cells-to-bone-metastasis-by-coupling-raman-spectroscopy-and-a-novel-use-of-mcr-als-algorithm
#15
Monica Marro, Claudia Nieva, Anna De Juan, Angels Sierra
Raman spectroscopy (RS) has shown promise as a tool to reveal biochemical changes that occur in cancer processes at the cellular level. However, when analysing clinical samples, RS requires improvements to be able to resolve biological components from the spectra. We compared the strengths of Multivariate Curve Resolution (MCR) versus Principal Component Analysis (PCA) to deconvolve meaningful biological components, formed by distinct mixtures of biological molecules, from a set of mixed spectra. We exploited the flexibility of the MCR algorithm to easily accommodate different initial estimates and constraints...
March 28, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29565204/zno-q-dots-as-a-potent-therapeutic-nanomedicine-for-in-vitro-cytotoxicity-evaluation-of-mouth-kb44-breast-mcf7-colon-ht29-and-hela-cancer-cell-lines-mouse-ear-swelling-tests-in-vivo-and-its-side-effects-using-the-animal-model
#16
Zahra Fakhroueian, Rouhollah Vahabpour, Mehdi Assmar, Alireza Massiha, Afshin Zahedi, Pegah Esmaeilzadeh, Fatemeh Katouzian, Sara Rezaei, Peyman Keyhanvar, Alireza Mozafari Dehshiri
Nanoformulations derived from fine porous ZnO quantum dot nanoparticles (QD NPs) can offer strong potential medical applications; especially in cancer therapy. ZnO QD NPs was synthesized by sol-gel hydrothermal process, fast cold quenching and further smart surface functionalization methods to obtain ultrasmall size (1-4 nm) NPs. ZnO nanopolymer, a wetting agent, PEG co-solvent and water/oil emulsion stabilizer were considered in our nanofluid formulation. The resulting nanofluid was characterized by SEM, FTIR, photoluminescence, band gap energy, zeta potential and UV-Vis spectroscopy...
March 22, 2018: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29560796/synthesis-and-characterization-of-novel-p-hema-la-madquat-micelles-for-co-delivery-of-methotrexate-and-chrysin-in-combination-cancer-chemotherapy
#17
Soodabeh Davaran, Hamed Fazeli, Aliyeh Ghamkhari, Fariborz Rahimi, Ommoleila Molavi, Maryam Anzabi, Roya Salehi
A Novel poly [2-hydroxyethyl methacrylate-Lactide-dimethylaminoethyl methacrylate quaternary ammonium alkyl halide] [P(HEMA-LA-MADQUAT)] copolymer was synthesized through combination of ring opening polymerization (ROP) and 'free' radical initiated polymerization methods. This newly developed copolymer was fully characterized by FT-IR,1 HNMR and13 CNMR spectroscopy. Micellization of the copolymer was performed by dialysis membrane method and obtained micelles were characterized by FESEM, dynamic light scattering (DLS), zeta potential (ξ), and critical micelle concentration (CMC) measurements...
March 21, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29560737/pamam-modified-citric-acid-coated-magnetic-nanoparticles-as-ph-sensitive-biocompatible-carrier-against-human-breast-cancer-cells
#18
Hamed Nosrati, Maral Adibtabar, Ali Sharafi, Hossein Danafar, Manjili Hamidreza Kheiri
Denderimer-modified magnetic nanoparticles are a promising drug delivery nanosystem which can improve the therapeutic efficacy of chemotherapy drugs and also can be beneficial as MR images contrast agent. The present study introduces the preparation and characterization of the potential therapeutic efficiency of CUR loaded denderimer modified citric acid coated Fe3 O4 NPs. Polyamidoamine (PAMAM (G5 )) was used to encapsulate citric acid coated Fe3 O4 nanoparticles. The successful preparation of CUR-loaded nanocarriers were confirmed by X-ray diffraction (XRD), thermogravimetric analysis (TGA), fourier transform infrared spectroscopy (FTIR), vibrating sample magnetometer (VSM) and transmission electron microscopy (TEM) techniques...
March 21, 2018: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/29556431/anti-cancer-and-anti-oxidant-properties-of-ethanolic-leaf-extract-of-thymus-vulgaris-and-its-bio-functionalized-silver-nanoparticles
#19
Zahra Heidari, Ali Salehzadeh, Seyed Ataollah Sadat Shandiz, Sara Tajdoost
This study highlights the anti-oxidant and anti-cancer activities of bio-functionalized Thymus vulgaris silver nanoparticles (TVAgNPs) and bioactive compounds were compared using the human breast cancer T47D cell line. The aqueous ethanolic extract of T. vulgaris evaluated for chemical composition using the gas chromatography-mass spectrometer (GC-MS) analysis. The prepared TVAgNPs were determined by means of UV-Vis spectroscopy, FTIR spectroscopy, zeta potential, scanning electron microscopy, transmission electron microscopy, and energy-dispersed spectroscopy analysis...
March 2018: 3 Biotech
https://www.readbyqxmd.com/read/29552710/gold-and-silver-nanoparticles-biomimetically-synthesized-using-date-palm-pollen-extract-induce-apoptosis-and-regulate-p53-and-bcl-2-expression-in-human-breast-adenocarcinoma-cells
#20
Hussaina Banu, N Renuka, S M Faheem, Raees Ismail, Vinita Singh, Zahra Saadatmand, Saad Sultan Khan, Kavya Narayanan, Alma Raheem, Kumpati Premkumar, Geetha Vasanthakumar
Recently, several attempts have been made to use the phytopharmaceuticals from plant extracts as reducing, capping and stabilizing agents for the biomimetic synthesis of various metal nanoparticles conjugated to the phytopharmaceuticals. These biogenic metal nanoparticles are non-toxic and can be used as contrast agents, drug delivery vehicles and photothermal agents for cancer therapy. Herein, we report the synthesis of both silver and gold nanoparticles using the pollen extract of Phoenix dactylifera (Date Palm), characterization using UV-visible spectroscopy, scanning electron microscopy and energy dispersive X-ray spectroscopy, quantitation of phytochemicals capping the nanoparticles using Folin - Ciocalteu's method, cytotoxicity studies on MCF-7 breast cancer cells, cancer cell death analysis using fluorescent microscopy, and modulation of expression of the pro-apoptotic p53 and anti-apoptotic Bcl-2 proteins...
March 18, 2018: Biological Trace Element Research
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