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https://www.readbyqxmd.com/read/28934710/calcium-availability-but-not-its-content-modulates-metal-toxicity-in-scenedesmus-quadricauda
#1
Jozef Kováčik, Sławomir Dresler
Impact of calcium nutrition (pre-culture on solid medium with standard or elevated Ca dose, i. e. 0.17 and 4.40mM marked as low and high Ca) on acute metal toxicity (Cd, Mn and Pb, 24h of exposure to 10µM) in freshwater green alga Scenedesmus quadricauda was studied. Surprisingly, Ca content differed only slightly between low and high Ca samples and applied metals rather suppressed its amount. Na content was higher in metal-exposed high Ca samples, indicating that Ca/Na ratio may affect accumulation of metals...
September 18, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28934281/smart-thermosensitive-liposomes-for-effective-solid-tumor-therapy-and-in-vivo-imaging
#2
Kevin Affram, Ofonime Udofot, Mandip Singh, Sunil Krishnan, Renee Reams, Jens Rosenberg, Edward Agyare
In numerous studies, liposomes have been used to deliver anticancer drugs such as doxorubicin to local heat-triggered tumor. Here, we investigate: (i) the ability of thermosensitive liposomal nanoparticle (TSLnp) as a delivery system to deliver poorly membrane-permeable anticancer drug, gemcitabine (Gem) to solid pancreatic tumor with the aid of local mild hyperthermia and, (ii) the possibility of using gadolinium (Magnevist®) loaded-TSLnps (Gd-TSLnps) to increase magnetic resonance imaging (MRI) contrast in solid tumor...
2017: PloS One
https://www.readbyqxmd.com/read/28932995/pharmacokinetics-and-preliminary-pharmacodynamics-of-single-and-multiple-dose-lyophilized-recombinant-glucagon-like-peptide-1-receptor-agonist-re-4-in-chinese-patients-with-type-2-diabetes-mellitus
#3
Yitong Wang, Bingfeng Xu, Lixia Zhu, Kun Lou, Yingli Chen, Xia Zhao, Qian Wang, Ling Xu, Xiaohui Guo, Linong Ji, Yimin Cui, Yi Fang
BACKGROUND AND OBJECTIVES: Recombinant glucagon-like peptide-1 receptor agonist (rE-4) is a glucagon-like peptide-1 receptor agonist, which has the same amino acid sequence to exenatide, except for the C-terminal deamidated. This study assessed the pharmacokinetics and preliminary pharmacodynamics of rE-4, following single and multiple subcutaneous injections in Chinese patients with type 2 diabetes mellitus (T2DM). DESIGN AND METHODS: In the randomized, open-label study, Chinese patients with T2DM (n = 36) were randomly assigned to three groups of rE-4 (n = 12), rE-4 with metformin (n = 12) and exenatide (n = 12, as the control group) for 12 weeks...
September 20, 2017: Clinical Drug Investigation
https://www.readbyqxmd.com/read/28931343/impact-of-bowel-gas-and-body-outline-variations-on-total-accumulated-dose-with-intensity-modulated-proton-therapy-in-locally-advanced-cervical-cancer-patients
#4
Thomas Berger, Jørgen Breede Baltzer Petersen, Jacob Christian Lindegaard, Lars Ulrik Fokdal, Kari Tanderup
INTRODUCTION: Density changes occurring during fractionated radiotherapy in the pelvic region may degrade proton dose distributions. The aim of the study was to quantify the dosimetric impact of gas cavities and body outline variations. MATERIAL AND METHODS: Seven patients with locally advanced cervical cancer (LACC) were analyzed through a total of 175 daily cone beam computed tomography (CBCT) scans. Four-beams intensity-modulated proton therapy (IMPT) dose plans were generated targeting the internal target volume (ITV) composed of: primary tumor, elective and pathological nodes...
September 21, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/28930776/a-phase1b-dose-escalation-study-of-recombinant-circularly-permuted-trail-in-patients-with-relapsed-or-refractory-multiple-myeloma
#5
Jian Hou, Lugui Qiu, Yaozhong Zhao, Xuejun Zhang, Yan Liu, Zhao Wang, Fang Zhou, Yun Leng, Shifang Yang, Hao Xi, Fuxu Wang, Bing Zhu, Wenming Chen, Peng Wei, Xiangjun Zheng
OBJECTIVES: Circularly permuted tumor necrosis factor-related apoptosis-inducing ligand (CPT), or CPT, is a novel antitumor drug candidate. This phase 1b study evaluated the safety, tolerability, pharmacokinetics (PK), and efficacy of single-agent CPT in patients with relapsed or refractory multiple myeloma (RRMM), and aimed to identify the recommended dose for the phase 2 study. MATERIALS AND METHODS: Patients received single or multiple doses (once daily for 5 consecutive days per 21-d cycle) of CPT intravenous infusion at doses of 5, 6...
September 19, 2017: American Journal of Clinical Oncology
https://www.readbyqxmd.com/read/28930516/new-targeted-therapies-and-diagnostic-methods-for-iron-overload-diseases
#6
Annita Kolnagou, Christina N Kontoghiorghe, George John Kontoghiorghes
Millions of people worldwide suffer from iron overload toxicity diseases such as transfusional iron overload in thalassaemia and hereditary haemochromatosis. The accumulation and presence of toxic focal iron deposits causing tissue damage can also be identified in Friedreich's ataxia, Alzheimer's, Parkinson's, renal and other diseases. Different diagnostic criteria of toxicity and therapeutic interventions apply to each disease of excess or misplaced iron. Magnetic resonance imaging relaxation times T2 and T2* for monitoring iron deposits in organs and iron biomarkers such as serum ferritin and transferrin iron saturation have contributed in the elucidation of iron toxicity mechanisms and pathways, and also the evaluation of the efficacy and mode of action of chelating drugs in the treatment of diseases related to iron overload, toxicity and metabolism...
January 1, 2018: Frontiers in Bioscience (Scholar Edition)
https://www.readbyqxmd.com/read/28930190/oligonol-a-low-molecular-weight-polyphenol-derived-from-lychee-alleviates-muscle-loss-in-diabetes-by-suppressing-atrogin-1-and-murf1
#7
Hung-Wen Liu, Yen-Ju Chen, Yun-Ching Chang, Sue-Joan Chang
Stimulation of the ubiquitin-proteasome pathway-especially E3 ubiquitin ligases Atrogin-1 and MuRF1-is associated with muscle loss in diabetes. Elevated lipid metabolites impair myogenesis. Oligonol, a low molecular weight polyphenol derived from lychee, exhibited anti-diabetic and anti-obesity properties, suggesting it could be a proper supplement for attenuating muscle loss. Dietary (10 weeks) oligonol supplementation (20 or 200 mg/kg diet) on the skeletal muscle loss was investigated in diabetic db/db mice...
September 20, 2017: Nutrients
https://www.readbyqxmd.com/read/28929951/the-fate-of-inhaled-nanoparticles-detection-and-measurement-by-enhanced-dark-field-microscopy
#8
Robert R Mercer, James F Scabilloni, Liying Wang, Lori A Battelli, James M Antonini, Jenny R Roberts, Yong Qian, Jennifer D Sisler, Vincent Castranova, Dale W Porter, Ann F Hubbs
Assessing the potential health risks for newly developed nanoparticles poses a significant challenge. Nanometer-sized particles are not generally detectable with the light microscope. Electron microscopy typically requires high-level doses, above the physiologic range, for particle examination in tissues. Enhanced dark-field microscopy (EDM) is an adaption of the light microscope that images scattered light. Nanoparticles scatter light with high efficiency while normal tissues do not. EDM has the potential to identify the critical target sites for nanoparticle deposition and injury in the lungs and other organs...
January 1, 2017: Toxicologic Pathology
https://www.readbyqxmd.com/read/28926940/stress-exposure-and-physical-mental-and-behavioral-health-among-american-indian-adults-with-type-2-diabetes
#9
Melissa L Walls, Kelley J Sittner, Benjamin D Aronson, Angie K Forsberg, Les B Whitbeck, Mustafa al'Absi
American Indian (AI) communities experience disproportionate exposure to stressors and health inequities including type 2 diabetes. Yet, we know little about the role of psychosocial stressors for AI diabetes-related health outcomes. We investigated associations between a range of stressors and psychological, behavioral, and physical health for AIs with diabetes. This community-based participatory research with 5 AI tribes includes 192 AI adult type 2 diabetes patients recruited from clinical records at tribal clinics...
September 16, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28926871/multiple-organic-cation-transporters-contribute-to-the-renal-transport-of-sulpiride
#10
Liping Li, Yayun Weng, Wei Wang, Mengru Bai, Hongmei Lei, Hui Zhou, Huidi Jiang
Sulpiride, a selective dopamine D2 receptor blocker, is widely used for treatment of schizophrenia, depression, and gastric/duodenal ulcers. Because of the great majority of sulpiride in positive charged at physiological pH7.4, and ~70% of dose recovered in urine in unchanged form after human intravenous administration of sulpiride, we believe transporters play an important role in renal excretion of sulpiride. The aim of the present study was to explore which transporters contribute to the renal disposition of sulpiride...
September 19, 2017: Biopharmaceutics & Drug Disposition
https://www.readbyqxmd.com/read/28926590/fluoxetine-ameliorates-cartilage-degradation-in-osteoarthritis-by-inhibiting-wnt-%C3%AE-catenin-signaling
#11
Kentaro Miyamoto, Bisei Ohkawara, Mikako Ito, Akio Masuda, Akihiro Hirakawa, Tadahiro Sakai, Hideki Hiraiwa, Takashi Hamada, Naoki Ishiguro, Kinji Ohno
Abnormal activation of the Wnt/β-catenin signaling is implicated in the osteoarthritis (OA) pathology. We searched for a pre-approved drug that suppresses abnormally activated Wnt/β-catenin signaling and has a potency to reduce joint pathology in OA. We introduced the TOPFlash reporter plasmid into HCS-2/8 human chondrosarcoma cells to estimate the Wnt/β-catenin activity in the presence of 10 μM each compound in a panel of pre-approved drugs. We found that fluoxetine, an antidepressant in the class of selective serotonin reuptake inhibitors (SSRI), down-regulated Wnt/β-catenin signaling in human chondrosarcoma cells...
2017: PloS One
https://www.readbyqxmd.com/read/28925985/differential-effects-of-surface-functionalized-zirconium-oxide-nanoparticles-on-alveolar-macrophages-rat-lung-and-a-mouse-allergy-model
#12
Antje Vennemann, Francesca Alessandrini, Martin Wiemann
Nanoparticles (NPs) may affect the lung via their chemical composition on the surface. Here, we compared the bioactivity of zirconium oxide (ZrO₂) NPs coated with either aminopropilsilane (APTS), tetraoxidecanoic acid (TODS), polyethyleneglycol (PGA), or acrylic acid (Acryl). Supernatants from NPs-treated cultured alveolar macrophages (NR8383) tested for lactate dehydrogenase, glucuronidase, tumor necrosis factor α, and H₂O₂ formation revealed dose-dependent effects, with only gradual differences among particles whose gravitational settling and cellular uptake were similar...
September 19, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28925554/monitoring-of-sesamia-nonagrioides-resistance-to-mon%C3%A2-810-maize-in-the-european-union-lessons-from-a-long-term-harmonized-plan
#13
Gema P Farinós, Pedro Hernández-Crespo, Félix Ortego, Pedro Castañera
BACKGROUND: MON 810 maize, which expresses the insecticidal protein Cry1Ab, is a highly effective method to control Sesamia nonagrioides (Lefèbvre), a key maize pest in Mediterranean countries. Monitoring programs to assess the potential development of resistance of target pests to Bt maize are mandatory in the European Union (EU). Here we report the results of the S. nonagrioides resistance monitoring plan implemented for MON 810 maize in the EU between 2004-2015 and reassess the different components of this long-term harmonized plan...
September 19, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28923868/gelofusine-ameliorates-colistin-induced-nephrotoxicity
#14
Sivashangarie Sivanesan, Mohammad A K Azad, Elena K Schneider, Maizbha U Ahmed, Jiayuan Huang, Jiping Wang, Jian Li, Roger L Nation, Tony Velkov
Colistin therapy is used as the last-line of defence against life-threatening Gram-negative infections. Nephrotoxicity is the major dose-limiting side-effect that impedes optimal dosing of patients. This study aims to examine the nephroprotective effect of the plasma volume expander gelofusine against colistin-induced nephrotoxicity. Renal protection was assessed in mice that were subcutaneously injected with colistin sulphate (14 mg/kg x 6 doses every 2 h; accumulated dose 84 mg/kg) and simultaneously injected in the intraperitoneal region with gelofusine (75, 150, 300 or 600 mg/kg x 6)...
September 18, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28923861/mct1-inhibitor-azd3965-increases-mitochondrial-metabolism-facilitating-combination-therapy-and-non-invasive-magnetic-resonance-spectroscopy
#15
Mounia Beloueche-Babari, Slawomir Wantuch, Teresa Casals Galobart, Markela Koniordou, Harold G Parkes, Vaitha Arunan, Yuen-Li Chung, Thomas R Eykyn, Paul D Smith, Martin O Leach
Monocarboxylate transporters (MCT) modulate tumor cell metabolism and offer promising therapeutic targets for cancer treatment. Understanding the impact of MCT blockade on tumor cell metabolism may help develop combination strategies or identify pharmacodynamic biomarkers to support the clinical development of MCT inhibitors now in clinical trials. In this study, we assessed the impact of the MCT1 inhibitor AZD3965 on cancer cell metabolism in vitro and in vivo. Exposing human lymphoma and colon carcinoma cells to AZD3965 increased MCT4-dependent accumulation of intracellular lactate, inhibiting monocarboxylate influx and efflux...
September 18, 2017: Cancer Research
https://www.readbyqxmd.com/read/28921500/growth-hormone-therapy-for-people-with-thalassaemia
#16
REVIEW
Chin Fang Ngim, Nai Ming Lai, Janet Yh Hong, Shir Ley Tan, Amutha Ramadas, Premala Muthukumarasamy, Meow-Keong Thong
BACKGROUND: Thalassaemia is a recessively-inherited blood disorder that leads to anaemia of varying severity. In those affected by the more severe forms, regular blood transfusions are required which may lead to iron overload. Accumulated iron from blood transfusions may be deposited in vital organs including the heart, liver and endocrine organs such as the pituitary glands which can affect growth hormone production. Growth hormone deficiency is one of the factors that can lead to short stature, a common complication in people with thalassaemia...
September 18, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28919755/synthetic-high-density-lipoprotein-nanodisks-for-targeted-withalongolide-delivery-to-adrenocortical-carcinoma
#17
Rui Kuai, Chitra Subramanian, Peter T White, Barbara N Timmermann, James J Moon, Mark S Cohen, Anna Schwendeman
Adrenocortical carcinoma (ACC) is a rare endocrine malignancy and has a 5-year survival rate of <35%. ACC cells require cholesterol for steroid hormone production, and this requirement is met via expression on the cell surface of a high level of SRB1, responsible for the uptake of high-density lipoproteins (HDLs), which carry and transport cholesterol in vivo. Here, we describe how this natural lipid carrier function of SRB1 can be utilized to improve the tumor-targeted delivery of a novel natural product derivative - withalongolide A 4,19,27-triacetate (WGA-TA) - which has shown potent antitumor efficacy, but poor aqueous solubility...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28919753/combination-of-graphene-oxide-silver-nanoparticle-nanocomposites-and-cisplatin-enhances-apoptosis-and-autophagy-in-human-cervical-cancer-cells
#18
Yu-Guo Yuan, Sangiliyandi Gurunathan
BACKGROUND: Cisplatin (Cis) is a widely used chemotherapeutic drug for treating a variety of cancers, due to its ability to induce cell death in cancer cells significantly. Recently, graphene and its modified nanocomposites have gained much interest in cancer therapy, due to their unique physicochemical properties. The objective of this study was to investigate the combination effect of Cis and a reduced graphene oxide-silver nanoparticle nanocomposite (rGO-AgNPs) in human cervical cancer (HeLa) cells...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28919158/a-role-for-nucleus-accumbens-glutamate-in-the-expression-but-not-the-induction-of-behavioural-sensitization-to-ethanol
#19
Christina N Nona, José N Nobrega
Mechanisms underlying differential sensitivity to behavioural sensitization to ethanol (EtOH) remain poorly understood, although accumulating evidence suggests a role for glutamatergic processes in the ventral striatum. Efforts to address this issue can benefit from the well-documented fact that in any given cohort, some of the mice (High sensitized; HS) show robust sensitization, while others (Low sensitized; LS) show little, if any, sensitization. Here, we examined whether this variability might be differentially associated with nucleus accumbens (NAc) glutamate processes...
September 14, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28918494/betaine-in-the-brain-characterization-of-betaine-uptake-its-influence-on-other-osmolytes-and-its-potential-role-in-neuroprotection-from-osmotic-stress
#20
Leena S Knight, Quinn Piibe, Ian Lambie, Christopher Perkins, Paul H Yancey
Betaine (N-trimethylglycine), a common osmolyte, has received attention because of the number of clinical reports associating betaine supplementation with improved cognition, neuroprotection and exercise physiology. However, tissue analyses report little accumulation of betaine in brain tissue despite the presence of betaine/GABA transporters (BGT1) at the blood brain barrier and in nervous tissue, calling into question whether betaine influences neuronal function directly or indirectly. Therefore, the focus of this study was to determine what capacity nervous tissue has to accumulate betaine, specifically in the hippocampus, a region of the brain associated with learning and memory and one that is particularly susceptible to damage (e...
September 16, 2017: Neurochemical Research
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