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https://www.readbyqxmd.com/read/28633987/a-paradigm-shift-for-bone-quality-in-dentistry-a-literature-review
#1
REVIEW
Shinichiro Kuroshima, Masaru Kaku, Takuya Ishimoto, Muneteru Sasaki, Takayoshi Nakano, Takashi Sawase
PURPOSE: The aim of this study was to present the current concept of bone quality based on the proposal by the National Institutes of Health (NIH) and some of the cellular and molecular factors that affect bone quality. STUDY SELECTION: This is a literature review which focuses on collagen, biological apatite (BAp), and bone cells such as osteoblasts and osteocytes. RESULTS: In dentistry, the term "bone quality" has long been considered to be synonymous with bone mineral density (BMD) based on radiographic and sensible evaluations...
June 17, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28626137/novel-palm-fatty-acid-functionalized-magnetite-nanoparticles-for-magnetic-solid-phase-extraction-of-trace-polycyclic-aromatic-hydrocarbons-from-environmental-samples
#2
Siti Khalijah Mahmad Rozi, Hamid Rashidi Nodeh, Muhammad Afzal Kamboh, Ninie Suhana Abdul Manan, Sharifah Mohamad
A novel adsorbent, palm fatty acid coated magnetic Fe3O4 nanoparticles (MNP-FA) was successfully synthesized with immobilization of the palm fatty acid onto the surface of MNPs. The successful synthesis of MNP-FA was further confirmed by X-Ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) and Energy dispersive X-Ray spectroscopy (EDX) analyses and water contact angle (WCA) measurement. This newly synthesized MNP-FA was applied as magnetic solid phase extraction (MSPE) adsorbent for the enrichment of polycyclic aromatic hydrocarbons (PAHs), namely fluoranthene (FLT), pyrene (Pyr), chrysene (Cry) and benzo(a)pyrene (BaP) from environmental samples prior to High Performance Liquid Chromatography- Diode Array Detector (HPLC-DAD) analysis...
June 13, 2017: Journal of Oleo Science
https://www.readbyqxmd.com/read/28618850/polycyclic-aromatic-hydrocarbons-in-cambodian-smoked-fish
#3
Tereza Slámová, Adéla Fraňková, Anna Hubáčková, Jan Banout
More than 85% of the population in Cambodia is strongly dependent on agriculture, from which freshwater aquaculture is one of most important sources of food production. The smoked fish represents important source of nutrients for Cambodian population however, can also lead to excessive intake of PAH. A field survey was conducted among selected smoked fish producers near to Tonle Sap river in Kampong Chhnang province, Cambodia. The study revealed that maximal limits (ML) for BaP and the sum of 4 PAHs given by EC 1881/2006, was exceeded 2 to 50 times...
June 15, 2017: Food Additives & Contaminants. Part B, Surveillance
https://www.readbyqxmd.com/read/28618663/chemical-characteristics-and-source-apportionment-of-pm2-5-in-lanzhou-china
#4
Jihua Tan, Leiming Zhang, Xueming Zhou, Jingchun Duan, Yan Li, Jingnan Hu, Kebin He
Daily PM2.5 samples were collected during winter 2012 and summer 2013 at an urban site in Lanzhou and were analyzed for chemical compounds including water soluble inorganic ions (WSIN), trace elements, water soluble organic carbon (WSOC), carbonaceous species (OC/EC), polycyclic aromatic hydrocarbons (PAHs), and humic-like substances (HULIS). The seasonal-average reconstructed PM2.5 mass was 120.5μgm(-3) in winter and 34.1μgm(-3) in summer. The top three groups of species in PM2.5 were OC (35.4±13.9μgm(-3)), WSIN (34...
June 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28617532/the-effect-of-a-natural-standardized-bilberry-extract-mirtoselect%C3%A2-in-dry-eye-a-randomized-double-blinded-placebo-controlled-trial
#5
A Riva, S Togni, F Franceschi, S Kawada, Y Inaba, R Eggenhoffner, L Giacomelli
OBJECTIVE: Dry eye, a chronic disease of lachrymal fluid and corneo-conjunctival epithelium, could significantly impact visual function, affects quality of life and work productivity. Beside several conventional treatments, nutritional supplements based on bilberry extract have been identified as effective contributors to eye health. Here, we aim at investigating the bioavailability of a standardized bilberry extract, its ability to alleviate dry eye symptoms and its antioxidant potential...
May 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28607059/human-genome-wide-repair-map-of-dna-damage-caused-by-the-cigarette-smoke-carcinogen-benzo-a-pyrene
#6
Wentao Li, Jinchuan Hu, Ogun Adebali, Sheera Adar, Yanyan Yang, Yi-Ying Chiou, Aziz Sancar
Benzo[a]pyrene (BaP), a polycyclic aromatic hydrocarbon, is the major cause of lung cancer. BaP forms covalent DNA adducts after metabolic activation and induces mutations. We have developed a method for capturing oligonucleotides carrying bulky base adducts, including UV-induced cyclobutane pyrimidine dimers (CPDs) and BaP diol epoxide-deoxyguanosine (BPDE-dG), which are removed from the genome by nucleotide excision repair. The isolated oligonucleotides are ligated to adaptors, and after damage-specific immunoprecipitation, the adaptor-ligated oligonucleotides are converted to dsDNA with an appropriate translesion DNA synthesis (TLS) polymerase, followed by PCR amplification and next-generation sequencing (NGS) to generate genome-wide repair maps...
June 12, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28605872/characteristics-of-dissolved-organic-phosphorus-inputs-to-freshwater-lakes-a-case-study-of-lake-erhai-southwest-china
#7
Ningning Ji, Shengrui Wang, Li Zhang
In this study, we made the first estimate of the annual dissolved organic phosphorus (DOP) load to Lake Erhai, a typical mesotrophic-eutrophic lake in China. We also evaluated what proportion of DOP was bioavailable using enzymatically hydrolyzable phosphorus (EHP), and further assessed the potential impacts of DOP on lake water quality. We estimated that the annual DOP load into Lake Erhai accounted for nearly 50% of total dissolved phosphorus, while EHP accounted for about 30% of the bioavailable phosphorus (BAP) pool...
June 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28598261/neurotoxicity-of-alkylated-polycyclic-aromatic-compounds-in-human-neuroblastoma-cells
#8
Sailendra Nath Sarma, Jules M Blais, Hing Man Chan
Polycyclic aromatic compounds (PAC) are ubiquitous environmental pollutants originating from incomplete combustion processes. While the toxicity of parent PAC such as benzo[a]pyrene (BaP) is well characterized, effects of other alkyl-PAC dibenzothiophene (DBT) and retene (Ret) are not well established. The aim of this study was to examine the underlying relative neurotoxic mechanisms attributed to BaP (parent PAH), DBT and Ret (alkyl-PACs) using human neuroblastoma SK-N-SH cells. The lethal concentrations (LC10 and LC20) were found at approximately 10 µM and 40 µM, respectively after 24-h exposure of SK-N-SH cells...
June 9, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28594440/calcium-signalling-in-medial-intercalated-cell-dendrites-and-spines
#9
Cornelia Strobel, Robert K P Sullivan, Peter Stratton, Pankaj Sah
The amygdala plays a central role in fear conditioning and extinction. The medial intercalated (mITC) neurons are GABAergic cell clusters interspaced between the basolateral (BLA) and central amygdala (CeA). These neurons are thought to play a key role in fear and extinction, controlling the output of the CeA by feed-forward inhibition. BLA to mITC cell inputs are though to undergo synaptic plasticity, a mechanism underlying learning, which is mediated by NMDA-receptor dependent mechanisms that require changes in cytosolic calcium...
June 8, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28590158/relationship-between-total-polar-components-and-polycyclic-aromatic-hydrocarbons-in-fried-edible-oil
#10
Ke-Jing An, Yu-Lan Liu, Hai-Lan Liu
Deep-fried dough sticks (a Chinese traditional breakfast) were fried individually in peanut, sunflower, rapeseed, rice bran, soybean and palm oil without any time lag for 32 h (64 batches fried, each for 30 min) and fried oil samples were obtained every 2 h. The frying-induced changes in the levels of total polar compounds (TPC) and polycyclic aromatic hydrocarbons (PAHs) were investigated by edible oil polar compounds (EOPC) fast separation chromatographic system and gas chromatography-mass spectrometry (GC-MS), respectively...
June 20, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28589335/a-non-destructive-bfcod-assay-for-in-vivo-measurement-of-cytochrome-p450-3a-cyp3a-enzyme-activity-in-fish-embryos-and-larvae
#11
Elias M Oziolor, Alexis N Carey, Cole W Matson
There is increasing interest in quantifying the exposure and effects of anthropogenic contaminants in fish. Determination of exposures in wild fish is routinely performed, but methods to investigate potential effects are less established. One of the most relevant approaches would be the use of in vivo assays, but existing assays are often limited to in vitro determination of enzyme activity. Many pharmaceuticals and some persistent pollutants activate, and are metabolized by cytochrome P4503A (CYP3A), which make it a relevant and desirable target for biomarker research...
June 6, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/28587452/the-genetic-toxicity-of-complex-mixtures-of-polycyclic-aromatic-hydrocarbons-evaluating-dose-additivity-in-a-transgenic-mouse-model
#12
Alexandra S Long, Christine L Lemieux, Remi Gagne, Iain B Lambert, Paul A White
This study evaluates the risk assessment approach currently employed for polycyclic aromatic hydrocarbon (PAH)-contaminated media, wherein carcinogenic hazards are evaluated using a dose-addition model that employs potency equivalency factors (PEFs) for targeted carcinogenic PAHs. Here, Muta™Mouse mice were sub-chronically exposed to PAH mixtures (p.o.), and mutagenic potency (MP) values were determined for five tissues. Predicted dose-additive mixture MPs were generated by summing the products of the concentrations and MPs of the individual targeted PAHs; values were compared to the experimental MPs of the mixtures to evaluate dose-additivity...
June 6, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28587153/nanoporous-gold-films-prepared-by-a-combination-of-sputtering-and-dealloying-for-trace-detection-of-benzo-a-pyrene-based-on-surface-plasmon-resonance-spectroscopy
#13
Li Wang, Xiu-Mei Wan, Ran Gao, Dan-Feng Lu, Zhi-Mei Qi
A wavelength-interrogated surface plasmon resonance (SPR) sensor based on a nanoporous gold (NPG) film has been fabricated for the sensitive detection of trace quantities of benzo[a]pyrene (BaP) in water. The large-area uniform NPG film was prepared by a two-step process that includes sputtering deposition of a 60-nm-thick AuAg alloy film on a glass substrate and chemical dealloying of the alloy film in nitric acid. For SPR sensor applications, the NPG film plays the dual roles of analyte enrichment and supporting surface plasmon waves, which leads to sensitivity enhancement...
June 1, 2017: Sensors
https://www.readbyqxmd.com/read/28581534/bone-mineralization-and-densitometric-evaluation-of-vertebral-fractures-in-women-6-21-years-after-the-onset-of-anorexia-nervosa-symptoms
#14
Gabriela Jagielska, Jerzy Przedlacki, Zbigniew Bartoszewicz, Agnieszka Kondracka, Agnieszka Butwicka, Ewa Racicka, Olgierd Rowiński, Rafał Brzewski, Tomasz Wolańczyk, Celina Tomaszewicz-Libudzic, Urszula Szymańska
OBJECTIVES: We attempted to assess bone mineralization and the frequency of fractures occurrence in women with a history of treatment of anorexia nervosa (AN) in adolescence. METHODS: 47 women (age 20-36.8 years) were re-examined 6.33-21,2 years after the onset of AN symptoms. Bone mineral density (BMD) of total body, lumbar spine, femoral neck, total hip (DXA) and densitometric Vertebral Fracture Assessment (VFA) were performed on 46 of women and BAP, P1NP, CTX, estradiol, testosterone, cortisol, IGF-1, leptin, DHEA-S on 45 of women entered for the current study...
April 30, 2017: Psychiatria Polska
https://www.readbyqxmd.com/read/28581121/omalizumab-effectively-protects-against-early-and-late-allergic-responses-in-asthma-after-4-weeks
#15
Jordis Trischler, Adrian Lieb, Melina Arnold, Johannes Schulze, Martin Rosewich, Ralf Schubert, Ivan Bottoli, Stefan Zielen
Omalizumab is licensed for therapy in severe allergic asthma with an effect demonstrated after 8 weeks or longer treatment. Since new applications for omalizumab demand precise knowledge of the onset of effects, the objective of this study was to determine the time course of the early (EAR) and late allergic reaction (LAR). Ten patients (IgE >300 IU/mL and <700 IU/mL) with a significant response to allergen challenge were treated with omalizumab according to the approved dosing table. Bronchial allergen provocations (BAP) were repeated at week 1, 2, 4 and 8...
June 5, 2017: Allergy
https://www.readbyqxmd.com/read/28578707/meristem-culture-and-subsequent-micropropagation-of-chilean-strawberry-fragaria-chiloensis-l-duch
#16
Karla A Quiroz, Miguel Berríos, Basilio Carrasco, Jorge B Retamales, Peter D S Caligari, Rolando García-Gonzáles
BACKGROUND: Vegetative propagation of Fragaria sp. is traditionally carried out using stolons. This system of propagation, in addition to being slow, can spread plant diseases, particularly serious being viral. In vitro culture of meristems and the establishment of micropropagation protocols are important tools for solving these problems. In recent years, considerable effort has been made to develop in vitro propagation of the commercial strawberry in order to produce virus-free plants of high quality...
June 2, 2017: Biological Research
https://www.readbyqxmd.com/read/28577950/association-of-mth1-expression-with-the-tumor-malignant-potential-and-poor-prognosis-in-patients-with-resected-lung-cancer
#17
Takatoshi Fujishita, Tatsuro Okamoto, Takaki Akamine, Shinkichi Takamori, Kazuki Takada, Masakazu Katsura, Goji Toyokawa, Fumihiro Shoji, Mototsugu Shimokawa, Yoshinao Oda, Yusaku Nakabeppu, Yoshihiko Maehara
OBJECTIVES: The oxidized purine nucleoside triphosphatase, mutT homolog 1 (MTH1), physiologically sanitizes 8-oxo-dGTP in the nucleotide pool. Previous studies indicated that MTH1 is associated with tumor proliferation and invasion in non-small cell lung cancer (NSCLC) cell lines; however, the role of MTH1 in patients with NSCLC remains unclear. MATERIALS AND METHODS: Two patient cohorts that underwent surgery for NSCLC in our institution were investigated retrospectively...
July 2017: Lung Cancer: Journal of the International Association for the Study of Lung Cancer
https://www.readbyqxmd.com/read/28575466/dose-response-mutation-and-spectrum-analyses-reveal-similar-responses-at-two-microsatellite-loci-in-benzo-a-pyrene-exposed-mouse-spermatogonia
#18
Andrea Rowan-Carroll, Marc A Beal, Andrew Williams, Francesco Marchetti, Carole L Yauk
Identifying chemical exposures that can cause germline mutations is important as these mutations can be inherited, impacting both individual and population health. However, germline mutations are extremely rare and difficult to detect. Chemically induced germline mutations can be detected through analysis of highly unstable tandem repeat DNA. We recently developed a single-molecule PCR (SM-PCR) approach to quantify mutations at a mouse microsatellite locus (Mm2.2.1) in sperm for such purposes. In this study, we refine this approach through the combined analysis of mouse microsatellites Mm2...
May 30, 2017: Mutagenesis
https://www.readbyqxmd.com/read/28573603/influence-of-culture-medium-composition-and-light-conditions-on-the-accumulation-of-bioactive-compounds-in-shoot-cultures-of-scutellaria-lateriflora-l-american-skullcap-grown-in-vitro
#19
Beata Kawka, Inga Kwiecień, Halina Ekiert
Methanolic extracts from in vitro grown Scutellaria lateriflora shoots cultured on five Murashige and Skoog (MS) medium variants supplemented with different combinations of 6-benzylaminopurine (BAP) and α-naphthaleneacetic acid (NAA) under different light conditions (monochromatic light, white light and no light) were analysed by HPLC for three groups of metabolites: flavonoids (26 compounds), phenolic acids and their precursors (19+2) and phenylethanoid glycosides (2). The analyses revealed the presence of baicalein, baicalin, wogonin, wogonoside, 3,4-dihydroxyphenylacetic acid and verbascoside...
June 1, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/28572622/probing-the-action-of-a-novel-anti-leukaemic-drug-therapy-at-the-single-cell-level-using-modern-vibrational-spectroscopy-techniques
#20
Joanna L Denbigh, David Perez-Guaita, Robbin R Vernooij, Mark J Tobin, Keith R Bambery, Yun Xu, Andrew D Southam, Farhat L Khanim, Mark T Drayson, Nicholas P Lockyer, Royston Goodacre, Bayden R Wood
Acute myeloid leukaemia (AML) is a life threatening cancer for which there is an urgent clinical need for novel therapeutic approaches. A redeployed drug combination of bezafibrate and medroxyprogesterone acetate (BaP) has shown anti-leukaemic activity in vitro and in vivo. Elucidation of the BaP mechanism of action is required in order to understand how to maximise the clinical benefit. Attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy, Synchrotron radiation FTIR (S-FTIR) and Raman microspectroscopy are powerful complementary techniques which were employed to probe the biochemical composition of two AML cell lines in the presence and absence of BaP...
June 1, 2017: Scientific Reports
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