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https://www.readbyqxmd.com/read/28346741/small-molecules-targeting-human-n-acetylmannosamine-kinase
#1
Stephan Hinderlich, Martin Neuenschwander, Paul-Robin Wratil, Andreas Oder, Michael Lisurek, Long D Nguyen, Jens Peter von Kries, Christian Hackenberger
N-Acetylmannosamine kinase (MNK) plays a key role in the biosynthesis of sialic acids and glycosylation of proteins. Sialylated glycoconjugates affect a large number of biological processes, including immune modulation and cancer transformation. For the search of effective inhibitors of MNK we applied high-throughput screening of drug-like small molecules. Applying different orthogonal assays for their validation we identified four potential MNK-specific inhibitors with IC50 values in the low micromolar range...
March 27, 2017: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/28342455/repair-of-oxidatively-induced-dna-damage-by-dna-glycosylases-mechanisms-of-action-substrate-specificities-and-excision-kinetics
#2
REVIEW
Miral Dizdaroglu, Erdem Coskun, Pawel Jaruga
Endogenous and exogenous reactive species cause oxidatively induced DNA damage in living organisms by a variety of mechanisms. As a result, a plethora of mutagenic and/or cytotoxic products are formed in cellular DNA. This type of DNA damage is repaired by base excision repair, although nucleotide excision repair also plays a limited role. DNA glycosylases remove modified DNA bases from DNA by hydrolyzing the glycosidic bond leaving behind an apurinic/apyrimidinic (AP) site. Some of them also possess an accompanying AP-lyase activity that cleaves the sugar-phosphate chain of DNA...
January 2017: Mutation Research
https://www.readbyqxmd.com/read/28341459/does-where-you-shop-or-who-you-are-predict-what-you-eat-the-role-of-stores-and-individual-characteristics-in-dietary-intake
#3
Christine A Vaughan, Rebecca Collins, Madhumita Ghosh-Dastidar, Robin Beckman, Tamara Dubowitz
Interventions to address diet, a modifiable risk factor for diabetes, cancer, and cardiovascular disease, have increasingly emphasized the influence of the physical environment on diet, while more traditional approaches have focused on individual characteristics. We examined environmental and individual influences on diet to understand the role of both. Household interviews were conducted in 2011 with 1372 individuals randomly selected from two low-income, predominantly African American neighborhoods in Pittsburgh, PA...
March 22, 2017: Preventive Medicine
https://www.readbyqxmd.com/read/28334971/expanding-glycosaminoglycan-chemical-space-towards-the-creation-of-sulfated-analogs-novel-polymers-and-chimeric-constructs
#4
Rachel S Lane, Kalib St Ange, Behnam Zolghadr, Xinyue Liu, Christina Schäffer, Robert J Linhardt, Paul L DeAngelis
Glycosaminoglycans (GAGs) have therapeutic potential in areas ranging from angiogenesis, inflammation, hemostasis and cancer. GAG bioactivity is conferred by intrinsic structural features, such as disaccharide composition, glycosidic linkages and sulfation pattern. Unfortunately, the in vitro enzymatic synthesis of defined GAGs is quite restricted by a limited understanding of current GAG synthases and modifying enzymes. Our work provides insights into GAG-active enzymes through the creation of sulfated oligosaccharides, a new polysaccharide and chimeric polymers...
March 17, 2017: Glycobiology
https://www.readbyqxmd.com/read/28334027/metformin-inhibits-gastric-cancer-cells-metastatic-traits-through-suppression-of-epithelial-mesenchymal-transition-in-a-glucose-independent-manner
#5
Shiva Valaee, Mohammad Mehdi Yaghoobi, Mehdi Shamsara
Epithelial-mesenchymal transition (EMT), which is mainly recognized by upregulation of mesenchymal markers and movement of cells, is a critical stage occurred during embryo development and spreading cancerous cells. Metformin is an antidiabetic drug used in treatment of type 2 diabetes. EMT inhibitory effect of metformin has been studied in several cancers; however, it remains unknown in gastric cancer. The aim of the present study was to investigate the metformin effects on inhibition of EMT-related genes as well as migration and invasion of AGS gastric cancer cell line...
2017: PloS One
https://www.readbyqxmd.com/read/28325079/dietary-guidelines-for-the-asia-pacific-region
#6
Colin W Binns, Mi Kyung Lee, Masaharu Kagawa, Wah Yun Low, Qiu Liqian, Georgia S Guldan, Tomiko Hokama, Keiko Nanishi, Sreymom Oy, Li Tang, Alfred Zerfas
Nutrition is a major determinant of health throughout all stages of life and together with smoking is the most important risk factor for morbidity and mortality in the Asia Pacific Region. The workshop participants examined Dietary Guidelines and Food Guides that are in use in our region, together with additional materials from the World Health Organization, UNICEF and the World Cancer Research Foundation. The resulting set of guidelines is meant as a reminder of the main issues to be covered in a general public health education program...
March 2017: Asia-Pacific Journal of Public Health
https://www.readbyqxmd.com/read/28322142/enhanced-release-of-immunostimulating-%C3%AE-1-3-glucan-by-autodigestion-of-the-lingzhi-medicinal-mushroom-ganoderma-lingzhi-agaricomycetes
#7
Yuina Ishimoto, Ken-Ichi Ishibashi, Daisuke Yamanaka, Yoshiyuki Adachi, Hisatomi Ito, Kentaro Igami, Toshitsugu Miyazaki, Naohito Ohno
Ganoderma lingzhi is a widely used medicinal mushroom that has antioxidative effects, ameliorates insulin resistance, and improves quality of life in patients with metabolic syndrome. Potentiation of immunity is also a major function of G. lingzhi, and this has been applied in patients with cancer. Supplementing G. lingzhi into foods reduced the metastasis of cancer cells. β-l,3-glucan is an important bioactive component of G. lingzhi. In this study we enhanced the solubilization ofimmunostimulating β-l,3-glucan by autodigestion of G...
2017: International Journal of Medicinal Mushrooms
https://www.readbyqxmd.com/read/28318083/dienophile-modified-mannosamine-derivatives-for-metabolic-labeling-of-sialic-acids-a-comparative-study
#8
Jeremias E G A Dold, Jessica Pfotzer, Anne-Katrin Späte, Valentin Wittmann
Sialic acids play an important role in numerous cell adhesion processes and sialylation levels are known to be altered under certain pathogenic conditions such as cancer. Metabolic glycoengineering with mannosamine derivatives is a convenient way to introduce non-natural chemical reporter groups into sialylated glycoconjugates offering the opportunity to label sialic acids using bioorthogonal ligation chemistry. The labeling intensity not only depends on the rate of the ligation reaction but also on the extent to which the natural sialic acids are replaced by the modified ones, i...
March 20, 2017: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/28304147/relation-of-dietary-carbohydrates-intake-to-circulating-sex-hormone-binding-globulin-levels-in-postmenopausal-women
#9
Mengna Huang, Jinjie Liu, Xiaochen Lin, Atsushi Goto, Yiqing Song, Lesley F Tinker, Kei-Hang Katie Chan, Simin Liu
BACKGROUND: Low circulating levels of sex hormone-binding globulin (SHBG) have been shown to be a direct and strong risk factor for type 2 diabetes, cardiovascular diseases, and hormone-dependent cancers, although the relation between various aspects of dietary carbohydrates and SHBG levels remains unexplored in population studies. METHODS: Among postmenopausal women with available SHBG measurements at baseline (n = 11,159) in the Women's Health Initiative, we conducted a comprehensive assessment of total dietary carbohydrates, glycemic load (GL), glycemic index (GI), fiber, sugar, and various carbohydrate-abundant foods in relation to circulating SHBG using multiple linear regressions adjusting for potential covariates...
March 17, 2017: Journal of Diabetes
https://www.readbyqxmd.com/read/28294075/%C3%AE-18f-fluoro-azomycin-arabinoside-%C3%AE-18f-faza-synthesis-radiofluorination-and-preliminary-pet-imaging-of-murine-a431-tumors
#10
Piyush Kumar, Peter Roselt, Gerald Reischl, Carlene Cullinane, Davood Beiki, Walter Ehrlichmann, David Binns, Ebrahim Naimi, Jennifer Yang, Rodney Hicks, Hans-Juergen Machulla, Leonard I Wiebe
BACKGROUND: 1-α-D-(5-Deoxy-5-[18F]fluoroarabinofuranosyl)-2-nitroimidazole ([18F]FAZA) is a PET radiotracer that demonstrates excellent potential in imaging regional hypoxia, and is clinically used in diagnosing a wide range of solid tumors in cancer patients. [18F]FAZA, however, is radiofluorinated in only moderate recovered radiochemical yield (rRCY, ~12%). It is postulated that the relative stability of the C1' β-anomeric bond at C5' will make 1-β-D-(5-fluoro-5-deoxyarabinofuranosyl)-2-nitroimidazole (β-FAZA), the β-conformer of FAZA, an attractive candidate for clinical hypoxia imaging...
March 13, 2017: Current Radiopharmaceuticals
https://www.readbyqxmd.com/read/28288142/serine-hydroxymethyl-transferase-1-stimulates-pro-oncogenic-cytokine-expression-through-sialic-acid-to-promote-ovarian-cancer-tumor-growth-and-progression
#11
R Gupta, Q Yang, S K Dogra, N Wajapeyee
High-grade serous (HGS) ovarian cancer accounts for 90% of all ovarian cancer-related deaths. However, factors that drive HGS ovarian cancer tumor growth have not been fully elucidated. In particular, comprehensive analysis of the metabolic requirements of ovarian cancer tumor growth has not been performed. By analyzing The Cancer Genome Atlas mRNA expression data for HGS ovarian cancer patient samples, we observed that six enzymes of the folic acid metabolic pathway were overexpressed in HGS ovarian cancer samples compared with normal ovary samples...
March 13, 2017: Oncogene
https://www.readbyqxmd.com/read/28282021/utilization-of-clinical-preventive-services-for-cancer-and-heart-disease-among-insured-adults-united-states-2015
#12
Anjel Vahratian, Stephen J Blumberg
Data from the National Health Interview Survey •Two-thirds of insured adults aged 50-75 were screened for colorectal cancer within the recommended intervals. •Insured women aged 30-39 (90.5%) were more likely than their older peers to be screened for cervical cancer within the recommended intervals. •Seventy-three percent of insured women aged 50-74 had a mammogram in the past 2 years. •The percentage of insured adults who had a cardiovascular risk screening (blood pressure, blood sugar) within the recommended intervals significantly increased with advancing age for both men and women...
March 2017: NCHS Data Brief
https://www.readbyqxmd.com/read/28271680/tumor-abnormal-protein-as-a-novel-biomarker-in-papillary-thyroid-carcinoma
#13
Zhinan Liu, Jingsheng Cai, Yue Yu, Haisheng Fang, Yan Si, Jinista J Jankee, Meiping Shen
BACKGROUND: High level of serum tumor abnormal protein (TAP) may be useful in early diagnosis of cancers. This study aims to investigate the diagnostic value of TAP in patients with papillary thyroid carcinoma (PTC). METHODS: Abnormal sugar chain glycoproteins from peripheral blood of 139 patients with PTC, 39 patients with benign thyroid nodular and 35 healthy individuals were used. Receiver operating characteristic (ROC) curve was performed to evaluate diagnostic value of tumor abnormal protein (TAP)...
March 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28260144/susceptibility-to-food-advertisements-and-sugar-sweetened-beverage-intake-in-non-hispanic-black-and-non-hispanic-white-adolescents
#14
Meredith M Cervi, Tanya Agurs-Collins, Laura A Dwyer, Chan L Thai, Richard P Moser, Linda C Nebeling
Obesity among adolescents in the United States has risen by 16% in the past 30 years. One important contributing factor may be the increased consumption of sugar sweetened beverages (SSBs), which is encouraged by advertisements for unhealthy foods and drinks that are targeted to adolescents. The purpose of this analysis was to determine the association between susceptibility to food and drink advertisements and sugar-sweetened beverage (SSB) consumption in non-Hispanic black (NHB) and non-Hispanic white (NHW) adolescents and to examine if BMI is associated with SSB consumption...
March 4, 2017: Journal of Community Health
https://www.readbyqxmd.com/read/28259967/enhanced-expression-of-%C3%AE-2-3-linked-sialic-acids-promotes-gastric-cancer-cell-metastasis-and-correlates-with-poor-prognosis
#15
Li Shen, Zhiguo Luo, Junbo Wu, Li Qiu, Ming Luo, Qing Ke, Xiaoxia Dong
Gastric cancer (GC) is a highly metastatic disease and one of the leading causes of cancer death in the world. Aberrant glycosylation is one of many molecular changes that accompany malignant transformation. This study was aimed at identification of glycan profiling changes in GC progression and its potential mechanisms. We employed a microarray with 91 lectins to compare the differential glycans in the three human GC cell lines, SGC-7901, BGC-823 and MGC-803. According to glycan-binding specificities of lectins, all GC cell lines expressed common sugar structures, such as mannose, galactose and fucose...
February 20, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28249935/an-adolescent-and-early-adulthood-dietary-pattern-associated-with-inflammation-and-the-incidence-of-breast-cancer
#16
Holly R Harris, Walter C Willett, Rita L Vaidya, Karin B Michels
Adolescence is a highly susceptible period for mammary carcinogenesis, but few prospective studies have examined the role of adolescent diet in breast cancer risk. Reduced rank regression has previously been used to identify a dietary pattern associated with markers of inflammation (C-reactive protein, IL6, and TNFα receptor 2). We investigated whether an adolescent and early adulthood inflammatory dietary pattern was associated with breast cancer among 45,204 women in the Nurses' Health Study II using reduced rank regression...
March 1, 2017: Cancer Research
https://www.readbyqxmd.com/read/28230360/capsaicin-reduces-blood-glucose-by-increasing-insulin-levels-and-glycogen-content-better-than-capsiate-in-streptozotocin-induced-diabetic-rats
#17
Shiqi Zhang, Xiaohan Ma, Lei Zhang, Hui Sun, Xiong Liu
Chili peppers exhibit antiobesity, anticancer, antidiabetic, and pain- and itch-relieving effects on animals and humans; these effects are due to capsaicin, which is the main pungent and biologically active component of pepper. Capsiate, a nonpungent capsaicin analogue, is similar to capsaicin in terms of structure and biological activity. In this study, we investigated whether capsaicin and capsiate exhibit the same hypoglycemic effects on rats with type 1 diabetes (T1D). Experimental rats were categorized into four groups: control, model, capsaicin, and capsiate groups...
March 2, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28217247/dietary-factors-can-protect-against-liver-cancer-development
#18
EDITORIAL
Lemonica Koumbi
Liver cancer is the third leading cause of cancer mortality worldwide with hepatocellular carcinoma (HCC) representing more than 90% of primary liver cancers. Most HCC patients are also suffering from chronic liver disease (CLD). Evidence is emerging that the composition of diet plays an important role in HCC and CLD development and may also have a chemoprotective role. In contrast to other types of cancer, there are few studies investigating the role of diet in hepatocarcinogenesis. From the available data it is evident that high intakes of red meat and dietary sugar positively correlate with HCC occurrence...
January 28, 2017: World Journal of Hepatology
https://www.readbyqxmd.com/read/28216894/cytotoxic-activities-of-naturally-occurring-oleanane-ursane-and-lupane-type-triterpenes-on-hepg2-and-ags-cells
#19
Heejung Yang, Hyun Woo Kim, Young Choong Kim, Sang Hyun Sung
BACKGROUND: It is well known that the naturally occurring modified triterpenes in plants have a wide diversity of chemical structures and biological functions. The lupane-, oleanane-, and ursane-type triterpenes are the three major members of natural triterpenes with a wide range of biological properties. A systematic approach is necessary to review their structures and biological activities according to the backbones and the different substituents. OBJECTIVE: Thirty lupane-(L1-7), oleanane-(O1-14), and ursane-type (U1-9) triterpenes with structural diversity were examined to evaluate their cytotoxic activities against two cancer cell lines, human hepatocellular carcinoma (HepG2) and AGS cells...
January 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28216567/wine-flavonoids-in-health-and-disease-prevention
#20
Iva Fernandes, Rosa Pérez-Gregorio, Susana Soares, Nuno Mateus, Victor de Freitas
Wine, and particularly red wine, is a beverage with a great chemical complexity that is in continuous evolution. Chemically, wine is a hydroalcoholic solution (~78% water) that comprises a wide variety of chemical components, including aldehydes, esters, ketones, lipids, minerals, organic acids, phenolics, soluble proteins, sugars and vitamins. Flavonoids constitute a major group of polyphenolic compounds which are directly associated with the organoleptic and health-promoting properties of red wine. However, due to the insufficient epidemiological and in vivo evidences on this subject, the presence of a high number of variables such as human age, metabolism, the presence of alcohol, the complex wine chemistry, and the wide array of in vivo biological effects of these compounds suggest that only cautious conclusions may be drawn from studies focusing on the direct effect of wine and any specific health issue...
February 14, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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