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https://www.readbyqxmd.com/read/29773393/comparative-study-of-physicochemical-properties-and-bioactivity-of-hericium-erinaceus-polysaccharides-at-different-solvent-extractions
#1
Jing-Kun Yan, Zhi-Chao Ding, Xianli Gao, Yao-Yao Wang, Yan Yang, Di Wu, He-Nan Zhang
In this study, hot water, 0.9% NaCl, citric acid, and 1.25 M NaOH/0.05% NaBH4 were separately used for the extraction of water-soluble H. erinaceus polysaccharides (HEPs; HEP-W, HEP-S, HEP-C, and HEP-A) from the fruit body of Hericium erinaceus. The physicochemical properties and biological activities were then investigated and compared. Results showed that the extraction solvents exhibited significant effects on the extraction yields, molecular weights, monosaccharide compositions, preliminary structural characteristics, microstructures of HEPs and on their contents, such as neutral sugar, uronic acid, protein, and β-(1 → 3)-glucan...
August 1, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29771081/-analysis-of-related-factors-of-coins-foreign-bodies-crossing-the-esophagus-in-204-cases-of-children
#2
H L Lv, B Yan, Q H Zhang
Objective: To explore the anti-tumor effect of Stat3 antisense oligodeoxynucleotide on human Hep-2 cell tumor-bearing BALB/c nude mouse, to study the therapeutic value of Stat3 antisense oligodeoxynucleotide on laryngeal cancer. Method: Hep-2 cells from human laryngeal carcinoma in logarithmic phase were inoculated subcutaneously into BALB/c mice to establish a model of human Hep-2 cell tumor-bearing BALB/c mice. They were divided into blank group, control group and different concentrations of AS3 groups(1 group, 2 group, 3 group, 4 group), and then intraperitoneally administered once a day for 4 weeks, measuring body weight twice a week, and the long and short diameters of the tumors were recorded...
May 2018: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/29758423/tracking-enteric-viruses-in-green-vegetables-from-central-argentina-potential-association-with-viral-contamination-of-irrigation-waters
#3
V E Prez, L C Martínez, M Victoria, M O Giordano, G Masachessi, V E Ré, J V Pavan, R Colina, P A Barril, S V Nates
Consumption of green vegetable products is commonly viewed as a potential risk factor for infection with enteric viruses. The link between vegetable crops and fecally contaminated irrigation water establishes an environmental scenario that can result in a risk to human health. The aim of this work was to analyze the enteric viral quality in leafy green vegetables from Córdoba (Argentina) and its potential association with viral contamination of irrigation waters. During July-December 2012, vegetables were collected from peri-urban green farms (n = 19) and its corresponding urban river irrigation waters (n = 12)...
May 11, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29753785/lactoferrin-inhibits-aflatoxin-b1-and-aflatoxin-m1-induced-cytotoxicity-and-dna-damage-in-caco-2-hek-hep-g2-and-sk-n-sh-cells
#4
Nan Zheng, Huan Zhang, Songli Li, Jiaqi Wang, Jia Liu, Hui Ren, Yanan Gao
Aflatoxins, including aflatoxin B1 (AFB1 ) and M1 (AFM1 ), are natural potent carcinogens produced by Aspergillus spp. These compounds, which can often be detected in dairy foods, can cause diseases in human beings. However, the molecular mechanisms involved in cytotoxicity, as well as methods for intervention, remain largely unexplored. For example, it is unclear whether lactoferrin (LF), a major antioxidant in milk, can inhibit the cytotoxicity of AFB1 and AFM1 . In this study, we assessed AFB1 - and AFM1 -induced cell toxicity by measuring cell viability, membrane permeability, and genotoxicity, and then investigated the ability of LF to protect cells against AFB1 and AFM1 ...
May 10, 2018: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/29751763/harm-reduction-and-viral-hepatitis-c-in-european-prisons-a-cross-sectional-survey-of-25-countries
#5
Rob Bielen, Samya R Stumo, Rachel Halford, Klára Werling, Tatjana Reic, Heino Stöver, Geert Robaeys, Jeffrey V Lazarus
BACKGROUND: Current estimates suggest that 15% of all prisoners worldwide are chronically infected with the hepatitis C virus (HCV), and this number is even higher in regions with high rates of injecting drug use. Although harm reduction services such as opioid substitution therapy (OST) and needle and syringe programs (NSPs) are effective in preventing the further spread of HCV and HIV, the extent to which these are available in prisons varies significantly across countries. METHODS: The Hep-CORE study surveyed liver patient groups from 25 European countries in 2016 and mid-2017 on national policies related to harm reduction, testing/screening, and treatment for HCV in prison settings...
May 11, 2018: Harm Reduction Journal
https://www.readbyqxmd.com/read/29740544/establishment-of-a-host-to-host-transmission-model-for-mycobacterium-avium-subsp-hominissuis-using-caenorhabditis-elegans-and-identification-of-colonization-associated-genes
#6
Luiz E Bermudez, Sasha J Rose, Jamie L Everman, Navid R Ziaie
Mycobacterium avium subsp. hominissuis ( M. avium ) is a member of the non-tuberculous mycobacteria (NTM), and is a common cause of lung infection in patients with chronic NTM lung conditions. M. avium is an environmental bacterium believed to be transmitted from environmental sources. In this work we used a recently developed model in Caenorhabditis elegans to ask whether M. avium can be transmitted from host-to-host, and the bacterial genes associated with host colonization. Infection of C. elegans was carried out by placing the nematode in cultured with M...
2018: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29735800/potential-molecular-targets-of-statins-in-the-prevention-of-hepatocarcinogenesis
#7
Ezequiel Ridruejo, Giselle Romero-Caími, María J Obregón, Diana Kleiman de Pisarev, Laura Alvarez
Hepatocellular carcinoma (HCC) represents 90% of liver tumors. Statins, may reduce the incidence of various tumors, including HCC. Antitumoral activities may be mediated by changes in transforming growth factor-beta (TGF-β1) and thyroid hormones (TH) regulation. AIM: The aim of our study is to establish the statins mechanism of action and the potential key molecules involved in an in vivo and in vitro HCC model. MATERIALS AND METHODS: We used two models: in vivo (in rats) using diethylnitrosamine (DEN) and hexachlorobenzene (HCB) to develop HCC, we analyzed cell proliferation parameters (proliferating cell nuclear antigen, PCNA) and cholesterol metabolism (hydroxy-methylglutaryl-CoA reductase, HMGCoAR)...
April 9, 2018: Annals of Hepatology
https://www.readbyqxmd.com/read/29733578/erythrocyte-membrane-modified-janus-polymeric-motors-for-thrombus-therapy
#8
Jingxin Shao, Mona Abdelghani, Guizhi Shen, Shoupeng Cao, David S Williams, Jan C M van Hest
We report the construction of erythrocyte membrane-cloaked Janus polymeric motors (EM-JPMs) which are propelled by near infrared laser (NIR) irradiation, and which are successfully applied in thrombus ablation. Chitosan (a natural polysaccharide with positive charge, CHI) and heparin (glycosaminoglycan with negative charge, Hep) were selected as wall materials to construct biodegradable and biocompatible capsules through the layer-by-layer (LbL) self-assembly technique. By partially coating the capsule with a gold (Au) layer through sputter coating, a NIR-responsive Janus structure was obtained...
May 7, 2018: ACS Nano
https://www.readbyqxmd.com/read/29726268/two-pairs-of-phenolic-enantiomers-from-the-leaves-of-eucommia-ulmoides-oliver
#9
Jian-Kun Yan, Xu-Liu Shi, Paul Owusu Donkor, Xiu-Mei Gao, Li-Qin Ding, Feng Qiu
Two pairs of new phenolic enantiomers, (+)-eucophenolic A (1a), (-)-eucophenolic B (1b), (-)-eucophenolic C (2a), (+)-eucophenolic D (2b) were isolated from the leaves of Eucommia ulmodies Oliver by chiral enantiomeric resolution. Their structures were elucidated based on extensive spectroscopic analysis. The absolute configurations of 1a/1b and 2a/2b were determined by empirical method and the calculated ECD and OR. All compounds were tested for Hep G2 tumour cell lines. However, no compounds showed potential cytotoxic activities against Hep G2 in vitro...
May 4, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29719629/improvement-of-non-alcoholic-steatohepatitis-by-hepatocyte-like-cells-generated-from-ipscs-with-oct4-sox2-klf4-parp1
#10
Yueh Chien, Chi-Shuan Huang, Hsin-Chi Lin, Kai-Hsi Lu, Ping-Hsing Tsai, Ying-Hsiu Lai, Kuan-Hsuan Chen, Shou-Dong Lee, Yi-Hsiang Huang, Chien-Ying Wang
The prevalence of nonalcoholic fatty liver disease (NAFLD) is usually increased with age. Non-alcoholic steatohepatitis (NASH), a serious form of NAFLD, may lead to cirrhosis and end-stage liver diseases. Induced pluripotent stem cells (iPSCs) hold promising potential in personalized medicine. Although obviation of c-Myc reduces tumorigenic risk, it also largely reduced the generation of iPSCs. Recently, Poly(ADP-ribose) polymerase 1 (Parp1) has been reported to enhance cell reprogramming. In this study, we demonstrated that forced expression of Oct4/Sox2/Klf4/Parp1 (OSKP) effectively promoted iPSC generation from senescent somatic cells from 18-month-old mouse...
April 6, 2018: Oncotarget
https://www.readbyqxmd.com/read/29680977/a-signal-on-ratiometric-fluorometric-heparin-assay-based-on-the-direct-interaction-between-amino-modified-carbon-dots-and-dna
#11
Jianyong Huang, Fenglan Li, Rubin Guo, Yuyuan Chen, Zhenzhen Wang, Chengfei Zhao, Yanjie Zheng, Shaohuang Weng, Xinhua Lin
Amino-modified carbon dots (C-dots) with positively charged surface were prepared. They display strong blue fluorescence and are shown to act as quenchers of the green fluorescence of FAM-labeled ssDNA such as the F-probe used in this work that was immobilized on the C-dots. On the addition of highly negatively charged heparin (Hep), it will interact with the C-dots and displace the F-probe from C-dots. Once the F-probe is displaced by Hep, its green fluorescence is restored. The intrinsic blue fluorescence of the C-dots remains stable after addition of Hep...
April 21, 2018: Mikrochimica Acta
https://www.readbyqxmd.com/read/29676660/new-tailored-substituted%C3%A2-benzothiazole-schiff-base-cu-ii-zn-ii-antitumor-drug-entities-effect-of-substituents-on-dna-binding-profile-antimicrobial-and-cytotoxic-activity
#12
Siffeen Zehra, Mohammad Shavez Khan, Iqbal Ahmad, Farukh Arjmand
New tailored Cu(II) & Zn(II) metal-based antitumor drug entities were synthesized from substituted benzothiazole o‒vanillin Schiff base ligands. The complexes were thoroughly characterized by elemental analysis, spectroscopic studies {IR, 1 H & 13 C NMR, ESI-MS, EPR} and magnetic susceptibility measurements. The structure activity relationship (SAR) studies of benzothiazole Cu(II) & Zn(II) complexes having molecular formulas [C30 H22 CuN5 O7 S2 ], [C30 H20 Cl2 CuN5 O7 S2 ], [C30 H20 CuF2 N5 O7 S2 ], [C30 H22 N4 O4 S2 Zn], [C30 H20 Cl2 N4 O4 S2 Zn] and [C30 H20 F2 N5 O7 S2 Zn], with CT‒DNA were performed by employing absorption, emission titrations and hydrodynamic measurements...
April 20, 2018: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/29667555/synthesis-cytotoxicity-and-antioxidant-activity-of-new-analogues-of-rc-121-synthetic-derivatives-of-somatostatin
#13
Diana Wesselinova, Emilia D Naydenova, S Staykova, I G Goshev, L Vezenkov
BACKGROUND: Based on the structure of RC-121 (D-Phe-c (Cys-Tyr-D-Trp-Lys-Val-Cys)-Thr-NH2, - synthetic derivatives of somatostatin), some analogs were synthesized and tested for in vitro cytotoxic and antioxidant activity. OBJECTIVES: The new analogs were modifyed at position 5 with Dap (diaminopropanoic acid), Dab (diaminobutanoic acid) and Orn and at position 6 with the unnatural amino acids Tle (t-leucine). METHODS: The in vitro cytotoxic effects of the substances were investigated against a panel of human tumor cell lines HT-29 (human colorectal cancer cell line), MDA-MB-23 (human breast cancer cell line), Hep G-2 (human hepatocellular carcinoma cell line) and HeLa (cervical cancer cell line)...
April 17, 2018: Anti-cancer Agents in Medicinal Chemistry
https://www.readbyqxmd.com/read/29649145/combined-effect-of-anticancer-agents-and-cytochrome-c-decorated-hybrid-nanoparticles-for-liver-cancer-therapy
#14
Wejdan Al-Shakarchi, Ali Alsuraifi, Mohammed Abed, Marwan Abdullah, Alan Richardson, Anthony Curtis, Clare Hoskins
Hepatocellular carcinoma is an aggressive form of liver cancer that displays minimal symptoms until its late stages. Unfortunately, patient prognosis still remains poor with only 10% of patients surviving more than five years after diagnosis. Current chemotherapies alone are not offering efficient treatment, hence alternative therapeutic approaches are urgently required. In this work, we highlight the potential of combination of treatment of hepatocellular carcinoma with existing chemotherapies in combination with pro-apoptotic factor cytochrome C...
April 12, 2018: Pharmaceutics
https://www.readbyqxmd.com/read/29627691/selective-cytotoxic-and-genotoxic-activities-of-5-2-bromo-5-methoxybenzylidene-thiazolidine-2-4-dione-against-nci-h292-human-lung-carcinoma-cells
#15
Maria do D Rodrigues, Priscila B G S Santiago, Karla M R Marques, Valéria R A Pereira, Maria C A B de Castro, Jeanne C L L Cantalice, Teresinha G da Silva, Mônica L Adam, Silene C do Nascimento, Julianna F C de Albuquerque, Gardenia C G Militao
BACKGROUND: Thiazolidine-2,4-dione ring system is used as a pharmacophore to build various heterocyclic compounds aimed to interact with biological targets. In the present study, benzylidene-2,4-thiazolidinedione derivatives (compounds 2-5) were synthesized and screened against cancer cell lines and the genotoxicity and cytotoxicity of the most active compound (5) was investigated on normal and lung cancer cell line. METHODS: For in vitro cytotoxic screening, the MTT assay was used for HL60 and K562 (leukemia), MCF-7 (breast adenocarcinoma), HT29 (colon adenocarcinoma), HEp-2 (cervix carcinoma) and NCI-H292 (lung carcinoma) tumor cell lines and Alamar-blue assay was used for non-tumor cells (PBMC, human peripheral blood mononuclear cells) were used...
November 22, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29604911/extrinsic-and-intrinsic-apoptotic-responses-induced-by-shiitake-culinary-medicinal-mushroom-lentinus-edodes-agaricomycetes-aqueous-extract-against-a-larynx-carcinoma-cell-line
#16
Tiane C Finimundy, Gustavo Scola, Fernando J Scariot, Aldo J P Dillon, Sidnei Moura, Sérgio Echeverrigaray, João Pegas Henriques, Mariana Roesch-Ely
Cumulative evidence from research studies has shown that the shiitake culinary-medicinal mushroom, Lentinus edodes, is an excellent source of natural antitumor agents and is capable of inhibiting cancer cell growth. However, the cell signaling pathway that leads tumor cells to apoptosis is not well understood because many chemical compounds may be acting. This study investigated the chemopreventive effects of an L. edodes aqueous extract on human HEp-2 epithelial larynx carcinoma cells and normal human MRC-5 lung fibroblasts by identifying proliferative and apoptotic pathways...
2018: International Journal of Medicinal Mushrooms
https://www.readbyqxmd.com/read/29601194/electronic-properties-of-n-heterocyclic-carbenes-and-their-experimental-determination
#17
Han Vinh Huynh
N-Heterocyclic carbenes (NHCs) have become without doubt one of the most exciting and popular species in chemical science due to the ease of their preparation and modularity in stereoelectronic properties. Numerous types of NHCs have been prepared, and various experimental methodologies have been proposed for the study of their electronic properties in order to rationalize reactivities observed. The objective of this article is to provide a comprehensive overview of the most common and popular ones among them...
March 30, 2018: Chemical Reviews
https://www.readbyqxmd.com/read/29581752/enhanced-antitumor-activity-of-combined-megestrol-acetate-and-arsenic-trioxide-treatment-in-liver-cancer-cells
#18
Yan Xia, Xianhao Liu, Beibei Liu, Xiaoshi Zhang, Geng Tian
Liver cancer is an aggressive malignancy with a very high fatality rate. Although megestrol acetate (MA) and arsenic trioxide (ATO) have shown an antitumor effect in liver cancer cells, the therapeutic benefits of MA or ATO alone in patients with liver cancer were limited. The aim of the present study was to elucidate whether the co-treatment of MA/ATO could enhance antitumor efficacy in liver cancer cell lines (Hep G2 and BEL 7402) and explore the underlying anti-cancer mechanisms. The cell viability, apoptotic response and expression levels of associated proteins were detected by Cell Counting Kit-8 assay, flow cytometry and western blotting, respectively...
April 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29547342/policy-interventions-shaping-hiv-prevention-providers-active-role-in-the-hiv-continuum-of-care
#19
Rogério M Pinto, Susan S Witte, Prema L Filippone, C Jean Choi, Melanie Wall
The U.S. Centers for Disease Control and Prevention (CDC) Diffusion of Effective Behavioral Interventions project has disseminated HIV behavioral interventions (EBIs) across the United States since the 1990s. In 2011, the CDC launched the High-Impact HIV Prevention (HIP) project, providing EBIs plus high-impact services (HIV testing, primary care, and support services). Providers (nurses, social workers, educators) are unable to consistently make linkages; thus, numerous at-risk individuals are not benefitting from HIP...
March 1, 2018: Health Education & Behavior: the Official Publication of the Society for Public Health Education
https://www.readbyqxmd.com/read/29523219/timp-3-increases-the-chemosensitivity-of-laryngeal-carcinoma-to-cisplatin-via-facilitating-mitochondria-dependent-apoptosis
#20
Xiaohui Shen, Xia Gao, Hui Li, Yajun Gu, Junguo Wang
Laryngeal carcinoma is a kind of head and neck carcinoma with high incidence and mortality. Chemotherapy treatments ofhuman laryngeal carcinoma may fail due to the development of chemo-resistance. Tissue inhibitor of metalloproteinases 3 (TIMP3) has been shown to be implicated in a number of pathological processes typical for cancer. The present study aims to investigate the involvement of TIMP-3 in chemo-resistance of laryngeal carcinoma. We showed that TIMP3 expression was significantly decreased in chemo-resistant laryngeal carcinoma tissues compared with chemo-sensitivity tissues...
March 9, 2018: Oncology Research
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