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https://www.readbyqxmd.com/read/28231533/synthesis-characterization-and-dna-binding-cleavage-protein-binding-and-cytotoxicity-studies-of-co-ii-ni-ii-cu-ii-and-zn-ii-complexes-of-aminonaphthoquinone
#1
A Kosiha, C Parthiban, Kuppanagounder P Elango
The Co(II), Ni(II), Cu(II) and Zn(II) complexes of an aminonaphthoquinone ligand (L) have been prepared and characterized using analytical and spectral techniques. The structures of L and its Zn(II) complex are confirmed by single crystal X-ray diffraction study. The results indicate that Co(II), Ni(II) and Zn(II) complexes possess tetrahedral geometry while Cu(II) complex exhibits square planar structure. The interaction of L and its complexes with CT-DNA reveal that they could interact with CT-DNA through intercalation...
February 16, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28230759/analysis-of-the-total-biflavonoids-extract-from-selaginella-doederleinii-by-hplc-qtof-ms-and-its-in-vitro-and-in-vivo-anticancer-effects
#2
Hong Yao, Bing Chen, Yanyan Zhang, Huigen Ou, Yuxiang Li, Shaoguang Li, Peiying Shi, Xinhua Lin
Selaginella doederleinii Hieron has been traditionally used as a folk antitumor herbal medicine in China. In this paper, the phytochemical components of the total biflavonoids extract from S. doederleinii were studied by using high-performance liquid chromatography coupled with electrospray ionization quadrupole time-of-flight mass spectrometry (HPLC-ESI-QTOF MS/MS) in negative ion mode, and their in vitro and in vivo anticancer effects were evaluated. Four types of biflavonoids from S. doederleinii, including IC3'-IIC8'', IC3'-IIC6'', IC3'-IIC3''', and C-O linked biflavonoids were examined originally using QTOF MS/MS...
February 20, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28225596/top-down-metabolomic-approaches-for-nitrogen-containing-metabolites
#3
Ryo Nakabayashi, Kei Hashimoto, Kiminori Toyooka, Kazuki Saito
Streamlining the processes that reveal heteroatom-containing metabolites and their biosynthetic genes is essential in integrated metabolomics studies. These metabolites are especially targeted for their potential pharmaceutical activities. By using a Fourier-transform ion cyclotron resonance-mass spectrometry (FTICR-MS) instrument, we provide top-down targeted metabolomic analyses using ultrahigh-resolution liquid chromatography-mass spectrometry (LC-MS), high-resolution matrix-assisted laser desorption/ionization (MALDI), and high-resolution imaging mass spectrometry (IMS) with (15)N labeling of nitrogen-containing metabolites...
February 22, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28223142/glucose-capped-silver-nanoparticles-induce-cell-cycle-arrest-in-hela-cells
#4
Elisa Panzarini, Stefania Mariano, Cristian Vergallo, Elisabetta Carata, Gian Maria Fimia, Francesco Mura, Marco Rossi, Viviana Vergaro, Giuseppe Ciccarella, Marco Corazzari, Luciana Dini
This study aims to determine the interaction (uptake and biological effects on cell viability and cell cycle progression) of glucose capped silver nanoparticles (AgNPs-G) on human epithelioid cervix carcinoma (HeLa) cells, in relation to amount, 2×10(3) or 2×10(4) NPs/cell, and exposure time, up to 48h. The spherical and well dispersed AgNPs (30±5nm) were obtained by using glucose as reducing agent in a green synthesis method that ensures to stabilize AgNPs avoiding cytotoxic soluble silver ions Ag(+) release...
February 18, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28219421/regulation-of-voltage-gated-potassium-channels-attenuates-resistance-of-side-population-cells-to-gefitinib-in-the-human-lung-cancer-cell-line-nci-h460
#5
Seon Young Choi, Hang-Rae Kim, Pan Dong Ryu, So Yeong Lee
BACKGROUND: Side-population (SP) cells that exclude anti-cancer drugs have been found in various tumor cell lines. Moreover, SP cells have a higher proliferative potential and drug resistance than main population cells (Non-SP cells). Also, several ion channels are responsible for the drug resistance and proliferation of SP cells in cancer. METHODS: To confirm the expression and function of voltage-gated potassium (Kv) channels of SP cells, these cells, as well as highly expressed ATP-binding cassette (ABC) transporters and stemness genes, were isolated from a gefitinib-resistant human lung adenocarcinoma cell line (NCI-H460), using Hoechst 33342 efflux...
February 21, 2017: BMC Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28218889/scaling-human-cancer-risks-from-low-let-to-high-let-when-dose-effect-relationships-are-complex
#6
Igor Shuryak, Albert J Fornace, Kamal Datta, Shubhankar Suman, Santosh Kumar, Rainer K Sachs, David J Brenner
Health risks from space radiations, particularly from densely ionizing radiations, represent an important challenge for long-ranged manned space missions. Reliable methods are needed for scaling low-LET to high-LET radiation risks for humans, based on animal or in vitro studies comparing these radiations. The current standard metric, relative biological effectiveness (RBE) compares iso-effect doses of two radiations. By contrast, a proposed new metric, radiation effects ratio (RER), compares effects of two radiations at the same dose...
February 20, 2017: Radiation Research
https://www.readbyqxmd.com/read/28217814/-effects-of-growth-differentiation-factor-15-gdf-15-on-neurological-systems-cardiovascular-diseases-and-cancer-progression
#7
Dong-Dong Liu, Yan-Ai Mei
Growth differentiation factor-15 (GDF-15) is a member of the transforming growth factor beta superfamily. GDF-15 expression is dramatically upregulated during acute brain injury, cancer, cardiovascular disease, and inflammation, suggesting its potential value as a disease biomarker. It has been suggested that GDF-15 has neurotropic effects in the nervous system. Our studies showed that GDF-15 modulated the expression of neuronal K(+) and Ca(2+) ion channels and increased the release of excitatory transmitter in the medial prefrontal cortex of mice...
February 25, 2017: Sheng Li Xue Bao: [Acta Physiologica Sinica]
https://www.readbyqxmd.com/read/28215085/peptide-functionalized-gold-nanoparticles-as-a-stimuli-responsive-contrast-medium-in-multi-photon-microscopy
#8
Johan Borglin, Robert Selegård, Daniel Aili, Marica B Ericson
There is a need for biochemical contrast mediators with high signal to noise ratios enabling non-invasive biomedical sensing, e.g., for neural sensing, protein-protein interactions, in addition to cancer diagnostics. The translational challenge is to develop a biocompatible approach ensuring high biochemical contrast while avoiding a raise of the background signal. We here present a concept where gold nanoparticles (AuNPs) can be utilized as a stimuli responsive contrast medium by chemically triggering their ability to exhibit multiphoton induced luminescence (MIL) when performing multi-photon laser scanning microscopy (MPM)...
February 20, 2017: Nano Letters
https://www.readbyqxmd.com/read/28214590/green-engineered-biomolecule-capped-silver-and-copper-nanohybrids-using-prosopis-cineraria-leaf-extract-enhanced-antibacterial-activity-against-microbial-pathogens-of-public-health-relevance-and-cytotoxicity-on-human-breast-cancer-cells-mcf-7
#9
U Jinu, M Gomathi, I Saiqa, N Geetha, G Benelli, P Venkatachalam
This research focused on green engineering and characterization of silver (PcAgNPs) and copper nanoparticles (PcCuNPs) using Prosopis cineraria (Pc) leaf extract prepared by using microwave irradiation. We studied their enhanced antimicrobial activity on human pathogens as well as cytotoxicity on breast cancer cells (MCF-7). Biofabricated silver and copper nanoparticles exhibited UV-Visible absorbance peaks at 420 nm and 575 nm, confirming the bioreduction and stabilization of nanoparticles. Nanoparticles were characterized by FTIR, XRD, FESEM, and EDX analysis...
February 16, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28214397/a-case-of-iv-degree-on-acute-radiation-dermatitis-in-china
#10
Zhen Shen, Ya-Hong Chen, Yue Chen, Yan Chen, Zhe Lv, Hai-Cheng Gao
This report investigates the nursing procedure of a case of adjuvant therapy of rectal cancer on IV degree of acute radiation dermatitis patients in the penis and scrotum junction. The lesion degree gradually increased. Fixation of the dressing was difficult in the penis and scrotum junction. The concept of wet healing with new dressings was used in patient. The silver ion dressings were used in inhibiting infection, and the wound was covered by the rimmed foam dressings. When it comes to the shaping period, water gel transparent paste was applied instead to cover the wound...
February 2, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28213245/one-pot-synthesis-of-gold-carbon-dots-nanocomposite-and-its-application-for-cytosensing-of-metals-for-cancer-cells
#11
Hani Nasser Abdelhamid, Abuo Talib, Hui-Fen Wu
Cytosensing of biological transition metals is paramount important for cancer research. One-pot synthesis of the nanocomposite of carbon dots (CDs) and gold nanoparticles (AuNPs) is reported and has been applied for metal cytosensing. The nanocomposite (GCDs) is synthesized using citric acid (CA) and L-cysteine as precursors in the presence of chloroauric acid. The synthesis procedure exhibits many advantages including simple one step, green approach (solvent free method) and requires cheap chemical precursors...
May 1, 2017: Talanta
https://www.readbyqxmd.com/read/28212731/hamlet-a-protein-lipid-complex-with-broad-tumoricidal-activity
#12
REVIEW
James C S Ho, Aftab Nadeem, Catharina Svanborg
HAMLET (Human Alpha-lactalbumin Made LEthal to Tumor cells) is a tumoricidal protein-lipid complex with broad effects against cancer cells of different origin. The therapeutic potential is emphasized by a high degree of specificity for tumor tissue. Here we review early studies of HAMLET, in collaboration with the Orrenius laboratory, and some key features of the subsequent development of the HAMLET project. The early studies focused on the apoptotic response that accompanies death in HAMLET treated tumor cells and the role of mitochondria in this process...
January 15, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28207290/fatty-acid-and-mineral-receptors-as-drug-targets-for-gastrointestinal-disorders
#13
Pawin Pongkorpsakol, Aekkacha Moonwiriyakit, Chatchai Muanprasat
Nutrient-sensing receptors, including fatty acid receptors (FFA1-FFA4), Ca(2+)-sensing receptors and Zn(2+)-sensing receptors, are involved in several biological processes. These receptors are abundantly expressed in the GI tract, where they have been shown to play crucial roles in regulating GI function. This review provides an overview of the GI functions of fatty acid and mineral receptors, including the regulation of gastric and enteroendocrine functions, GI motility, ion transport and cell growth. Recently, several lines of evidence have implicated these receptors as promising therapeutic targets for the treatment of GI disorders, for example, inflammatory bowel disease, colorectal cancer, metabolic syndrome and diarrheal diseases...
February 16, 2017: Future Medicinal Chemistry
https://www.readbyqxmd.com/read/28205574/neuropathic-pain
#14
REVIEW
Luana Colloca, Taylor Ludman, Didier Bouhassira, Ralf Baron, Anthony H Dickenson, David Yarnitsky, Roy Freeman, Andrea Truini, Nadine Attal, Nanna B Finnerup, Christopher Eccleston, Eija Kalso, David L Bennett, Robert H Dworkin, Srinivasa N Raja
Neuropathic pain is caused by a lesion or disease of the somatosensory system, including peripheral fibres (Aβ, Aδ and C fibres) and central neurons, and affects 7-10% of the general population. Multiple causes of neuropathic pain have been described and its incidence is likely to increase owing to the ageing global population, increased incidence of diabetes mellitus and improved survival from cancer after chemotherapy. Indeed, imbalances between excitatory and inhibitory somatosensory signalling, alterations in ion channels and variability in the way that pain messages are modulated in the central nervous system all have been implicated in neuropathic pain...
February 16, 2017: Nature Reviews. Disease Primers
https://www.readbyqxmd.com/read/28202602/cancer-cell-behaviors-mediated-by-dysregulated-ph-dynamics-at-a-glance
#15
REVIEW
Katharine A White, Bree K Grillo-Hill, Diane L Barber
Dysregulated pH is a common characteristic of cancer cells, as they have an increased intracellular pH (pHi) and a decreased extracellular pH (pHe) compared with normal cells. Recent work has expanded our knowledge of how dysregulated pH dynamics influences cancer cell behaviors, including proliferation, metastasis, metabolic adaptation and tumorigenesis. Emerging data suggest that the dysregulated pH of cancers enables these specific cell behaviors by altering the structure and function of selective pH-sensitive proteins, termed pH sensors...
February 15, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28202521/ex-vivo-explant-cultures-of-non-small-cell-lung-carcinoma-enable-evaluation-of-primary-tumor-responses-to-anticancer-therapy
#16
Ellie Karekla, Wen-Jing Liao, Barry Sharp, John Pugh, Helen Reid, John Pc Le Quesne, David Moore, Catrin A Pritchard, Marion MacFarlane, J Howard Pringle
To improve treatment outcomes in non-small cell lung cancer (NSCLC), preclinical models that can better predict individual patient response to novel therapies are urgently needed. Using freshly resected tumor tissue, we describe an optimized ex vivo explant culture model that enables concurrent evaluation of NSCLC response to therapy while maintaining the tumor microenvironment. We found that ~70% of primary NSCLC specimens were amenable to explant culture with tissue integrity intact for up to 72 hours after explant...
February 15, 2017: Cancer Research
https://www.readbyqxmd.com/read/28199989/presence-of-cancer-associated-mutations-in-exhaled-breath-condensates-of-healthy-individuals-by-next-generation-sequencing
#17
Omar Youssef, Aija Knuuttila, Päivi Piirilä, Tom Böhling, Virinder Sarhadi, Sakari Knuutila
Exhaled breath condensate (EBC) is a non-invasive source that can be used for studying different genetic alterations occurring in lung tissue. However, the low yield of DNA available from EBC has hampered the more detailed mutation analysis by conventional methods. We applied the more sensitive amplicon-based next generation sequencing (NGS) to identify cancer related mutations in DNA isolated from EBC. In order to apply any method for the purpose of mutation screening in cancer patients, it is important to clarify the incidence of these mutations in healthy individuals...
February 9, 2017: Oncotarget
https://www.readbyqxmd.com/read/28199065/rapid-characterization-of-trace-aflatoxin-b1-on-groundnuts-wheat-and-maize-by-dispersive-liquid-liquid-microextraction-followed-by-direct-electrospray-probe-tandem-mass-spectrometry
#18
Thiphol Satarpai, Atitaya Siripinyanond, Hung Su, Jentaie Shiea
RATIONALE: Aflatoxins are poisonous and cancer-related chemical compounds commonly existed in crops and plants. Aflatoxin B1 is the most toxic compound among aflatoxins and has been classified as Group 1 carcinogenic to human, especially on liver cancer. Herein, an ambient mass spectrometric method was developed for rapid characterization of trace aflatoxin B1 on peanuts. METHODS: Direct electrospray probe tandem mass spectrometry was used to detect aflatoxin B1 on peanuts...
February 15, 2017: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28198817/dynamic-properties-of-calcium-activated-chloride-currents-in-xenopus-laevis-oocytes
#19
Ildefonso M De la Fuente, Iker Malaina, Alberto Pérez-Samartín, María Dolores Boyano, Gorka Pérez-Yarza, Carlos Bringas, Álvaro Villarroel, María Fedetz, Rogelio Arellano, Jesus M Cortes, Luis Martínez
Chloride is the most abundant permeable anion in the cell, and numerous studies in the last two decades highlight the great importance and broad physiological role of chloride currents mediated anion transport. They participate in a multiplicity of key processes, as for instance, the regulation of electrical excitability, apoptosis, cell cycle, epithelial secretion and neuronal excitability. In addition, dysfunction of Cl(-) channels is involved in a variety of human diseases such as epilepsy, osteoporosis and different cancer types...
February 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28194465/unravelling-the-role-of-protein-kinase-ck2-in-metal-toxicity-using-gene-deletion-mutants
#20
Adam J Johnson, Mohammad S Zaman, Filip Veljanoski, Alex A Phrakaysone, Suhua Li, Patrick J O'Doherty, Gayani Petersingham, Gabriel G Perrone, Mark P Molloy, Ming J Wu
Metal ions, biologically essential or toxic, are present in the surrounding environment of living organisms. Understanding their uptake, homeostasis or detoxification is critical in cell biology and human health. In this study, we investigated the role of protein kinase CK2 in metal toxicity using gene deletion strains of Saccharomyces cerevisiae against a panel of six metal ions. The deletion of CKA2, the yeast orthologue of mammalian CK2α', leads to a pronounced resistant phenotype against Zn(2+) and Al(3+), whilst the deletion of CKB1 or CKB2 results in tolerance to Cr(6+) and As(3+)...
February 14, 2017: Metallomics: Integrated Biometal Science
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