keyword
MENU ▼
Read by QxMD icon Read
search

Dose accumulation

keyword
https://www.readbyqxmd.com/read/28549216/agglomeration-determines-effects-of-carbonaceous-nanomaterials-on-soybean-nodulation-dinitrogen-fixation-potential-and-growth-in-soil
#1
Ying Wang, Chong Hyun Chang, Zhaoxia Ji, Dermont C Bouchard, Roger M Nisbet, Joshua P Schimel, Jorge L Gardea-Torresdey, Patricia A Holden
The potential effects of carbonaceous nanomaterials (CNMs) on agricultural plants are of concern. However, little research has been performed using plants cultivated to maturity in soils contaminated with various CNMs at different concentrations. Here, we grew soybean for 39 days to seed production in soil amended with 0.1, 100, or 1000 mg kg-1 of either multi-walled carbon nanotubes (MWCNTs), graphene nanoplatelets (GNPs), or carbon black (CB), and studied plant growth, nodulation, and dinitrogen (N2) fixation potential...
May 26, 2017: ACS Nano
https://www.readbyqxmd.com/read/28548843/zwitterionic-nanocarrier-surface-chemistry-improves-sirna-tumor-delivery-and-silencing-activity-relative-to-polyethylene-glycol
#2
Meredith A Jackson, Thomas A Werfel, Elizabeth J Curvino, Fang Yu, Taylor Elizabeth Kavanaugh, Samantha M Sarett, Mary D Dockery, Kameron V Kilchrist, Ayisha N Jackson, Todd D Giorgio, Craig L Duvall
Although siRNA-based nanomedicines hold promise for cancer treatment, conventional siRNA-polymer complex (polyplex) nanocarrier systems have poor pharmacokinetics following intravenous delivery, hindering tumor accumulation. Here, we determined the impact of surface chemistry on the in vivo pharmacokinetics and tumor delivery of siRNA polyplexes. A library of diblock polymers was synthesized, all containing the same pH-responsive, endosomolytic polyplex core-forming block but different corona blocks: 5 kDa (benchmark) and 20 kDa linear PEG, 10 kDa and 20 kDa brush-like poly(oligo ethylene glycol) (POEGMA), and 10 kDa and 20 kDa zwitterionic phosphorylcholine-based polymers (PMPC)...
May 26, 2017: ACS Nano
https://www.readbyqxmd.com/read/28548569/thyroxine-increases-collagen-type-ii-expression-and-accumulation-in-scaffold-free-tissue-engineered-articular-cartilage
#3
G Adam Whitney, Thomas J Kean, Russell J Fernandes, Stephen D Waldman, M Yat Tse, Stephen C Pang, Joseph M Mansour, James E Dennis
Low collagen accumulation in the extra-cellular matrix is a pressing problem in cartilage tissue engineering, leading to a low collagen-to-glycosaminoglycan (GAG) ratio and poor mechanical properties in neo-cartilage. Soluble factors have been shown to increase collagen content, but may result in a more pronounced increase in GAG content. Thyroid hormones have been reported to stimulate collagen and GAG production, but reported outcomes, including which specific collagen types are affected, are variable throughout the literature...
May 26, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28546951/common-chemotherapeutic-agents-modulate-fatty-acid-distribution-in-human-hepatocellular-carcinoma-and-colorectal-cancer-cells
#4
Amir Mehdizadeh, Morteza Bonyadi, Masoud Darabi, Reza Rahbarghazi, Soheila Montazersaheb, Kobra Velaei, Maghsood Shaaker, Mohammad-Hossein Somi
Introduction: Cancer cells are critically correlated with lipid molecules, particularly fatty acids, as structural blocks for membrane building, energy sources, and related signaling molecules. Therefore, cancer progression is in direct correlation with fatty acid metabolism. The aim of this study was to investigate the potential effects of common chemotherapeutic agents on the lipid metabolism of hepatocellular carcinoma (HCC) and colorectal cancer (CRC) cells, with a focus on alterations in cellular fatty acid contents...
2017: BioImpacts: BI
https://www.readbyqxmd.com/read/28545141/prion-pathogenesis-is-unaltered-in-the-absence-of-sirp%C3%AE-mediated-don-t-eat-me-signaling
#5
Mario Nuvolone, Marta Paolucci, Silvia Sorce, Veronika Kana, Rita Moos, Takashi Matozaki, Adriano Aguzzi
Prion diseases are neurodegenerative conditions caused by misfolding of the prion protein, leading to conspicuous neuronal loss and intense microgliosis. Recent experimental evidence point towards a protective role of microglia against prion-induced neurodegeneration, possibly through elimination of prion-containing apoptotic bodies. The molecular mechanisms by which microglia recognize and eliminate apoptotic cells in the context of prion diseases are poorly defined. Here we investigated the possible involvement of signal regulatory protein α (SIRPα), a key modulator of host cell phagocytosis; SIRPα is encoded by the Sirpa gene that is genetically linked to the prion gene Prnp...
2017: PloS One
https://www.readbyqxmd.com/read/28544894/regulation-of-maize-kernel-weight-and-carbohydrate-metabolism-by-abscisic-acid-applied-at-the-early-and-middle-post-pollination-stages-in-vitro
#6
Li Zhang, Xu-Hui Li, Zhen Gao, Si Shen, Xiao-Gui Liang, Xue Zhao, Shan Lin, Shun-Li Zhou
Abscisic acid (ABA) accumulates in plants under drought stress, but views on the role of ABA in kernel formation and abortion are not unified. The response of the developing maize kernel to exogenous ABA was investigated by excising kernels from cob sections at four days after pollination and culturing in vitro with different concentrations of ABA (0, 5, 10, 100μM). When ABA was applied at the early post-pollination stage (EPPS), significant weight loss was observed at high ABA concentration (100μM), which could be attributed to jointly affected sink capacity and activity...
May 10, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28542038/hypoxia-as-a-target-for-drug-combination-therapy-of-liver-cancer
#7
Cressida Bowyer, Andrew L Lewis, Andrew W Lloyd, Gary J Phillips, Wendy M Macfarlane
Hepatocellular carcinoma (HCC) is the third most frequent cause of cancer deaths worldwide. The standard of care for intermediate HCC is transarterial chemoembolization, which combines tumour embolization with locoregional delivery of the chemotherapeutic doxorubicin. Embolization therapies induce hypoxia, leading to the escape and proliferation of hypoxia-adapted cancer cells. The transcription factor that orchestrates responses to hypoxia is hypoxia-inducible factor 1 (HIF-1). The aim of this work is to show that targeting HIF-1 with combined drug therapy presents an opportunity for improving outcomes for HCC treatment...
May 24, 2017: Anti-cancer Drugs
https://www.readbyqxmd.com/read/28541776/enantioselective-apoptosis-and-oxidative-damage-induced-by-individual-isomers-of-profenofos-in-primary-hippocampal-neurons
#8
Xian T Lu, Yun Ma, Hang J Zhang, Mei Q Jin, Jun H Tang
The purpose of this study was to investigate the apoptosis-related cytotoxic effects and molecular mechanisms of individual isomers of profenofos (PFF) on primary hippocampal neurons at 1.0 to 20 mg L(-1). The cell viability and lactate dehydrogenase (LDH) efflux indicated that (-)-PFF exposure was associated with more toxic effects than (+)-PFF above the concentration of 5 mg L(-1) (P < 0.5). Flow cytometric results showed that the percentages of apoptotic cells incubated with 20 mg L(-1) (-)-PFF, (+)-PFF and rac-PFF for 24 h reached 23...
May 25, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28538627/early-heparin-administration-after-tbi-prolonged-cognitive-recovery-associated-with-reduced-cerebral-edema-and-neutrophil-sequestration
#9
Katsuhiro Nagata, Kevin D Browne, Yujin Suto, Kenichiro Kumasaka, John Cognetti, Victoria E Johnson, Joshua Marks, Douglas H Smith, Jose L Pascual
BACKGROUND: Early administration of unfractionated heparin (UFH) after TBI reduces early in vivo circulating leukocytes (LEU) in peri-injury penumbral brain tissue, enhancing cognitive recovery 2 days after injury. It remains unclear how long this effect lasts and if this is related to persistently accumulating LEU in penumbral brain tissue. We hypothesized that UFH reduces LEU brain tissue sequestration resulting in prolonged cognitive recovery. METHODS: CD1 male mice underwent either TBI by controlled cortical impact (CCI) or sham craniotomy...
May 22, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28538364/thalidomide-results-in-diminished-ovarian-reserve-in-reproductive-age-female-ibd-patients
#10
Xiang Peng, Min Zhi, Ming Wei, Ting-Ting Li, Min Zhang, Yuan-Qi Zhang, Huan He, Mingli Su, Wei Wang, Jun-Rong Chen, Jian Tang, Xiang Gao, Pin-Jin Hu, Xiao-Yan Liang
The effectiveness of thalidomide in treating inflammatory bowel disease (IBD) has been widely recognized. Meanwhile, many serious adverse drug reactions have been observed, but no know reports on ovarian reserve function.Female patients, ranging in age between 18 and 40, were referred to our institution to undergo sex hormone detection and ultrasonic scanning for ovarian function assessment, between February 1, 2016 and September 31, 2016.Thirty-three patients treated with thalidomide (group A), 73 patients without thalidomide (group B), and 78 healthy women as control were studied...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28537788/the-precision-of-hepatic-arterial-infusion-scintigraphy-as-a-quantitative-biomarker-of-tumor-microvasculature
#11
Mark Dunphy, Neeta Pandit-Taskar, Josef J Fox, Nancy Kemeny
OBJECTIVE: Optimal clinical development of new cancer therapies targeting tumor vasculature requires new target-specific response assays. This clinical study examined the test-retest repeatability of SPECT as an in vivo assay of angiogenic hepatic tumor microvasculature using an intraarterial infusion of (99m)Tc-macroaggregated albumin (MAA) delivered via a hepatic artery infusion (HAI) pump. MATERIALS AND METHODS: Patients with primary or secondary cancerous liver tumors with HAI pump-catheter implants placed for HAI chemotherapy underwent hepatic SPECT after separate arterial infusions of 37 and 185 MBq of (99m)Tc-MAA via an HAI pump...
May 24, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28537657/interferon-%C3%AE-affects-leukemia-cell-apoptosis-through-regulating-fas-fasl-signaling-pathway
#12
H-L Xia, C-J Li, X-F Hou, H Zhang, Z-H Wu, J Wang
OBJECTIVE: Imbalance of hematopoietic cell proliferation and apoptosis is one of the major causes of leukemia. Enhanced cell proliferation and reduced apoptosis lead to hemocytes accumulation. Fas/FasL signaling pathway promotes cell apoptosis. This study investigated the impact of interferon γ (IFN-γ) on chronic myelogenous leukemia cell proliferation and apoptosis to elucidate its interaction with Fas/FasL signaling pathway. PATIENTS AND METHODS: Leukemia K562 cells were routinely cultivated and treated with 10 U/ml, 100 U/ml, and 1000 U/ml interferon for 12 h, 24 h, and 48 h, respectively...
May 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28536872/cytoprotective-propensity-of-green-tea-polyphenols-against-citrinin-induced-skeletal-myotube-damage-in-c2c12-cells
#13
G R Sharath Babu, N Ilaiyaraja, Farhath Khanum, T Anand
The mycotoxin citrinin, is produced by several species of Penicillium, Aspergillus and Monascus, and is capable of inducing cytotoxicity, oxidative stress and apoptosis. The aim of the present study was to investigate the effect of citrinin in mouse skeletal muscle cells (C2C12) and to overcome the cellular adverse effects by supplementing green tea extract (GTE) rich in polyphenols. C2C12 myoblasts were differentiated to myotubes and were exposed to citrinin in a dose dependent manner (0-100 µM) for 24 h and IC50 value was found to be 100 µM that resulted in decreased cell viability, increased LDH leakage and compromised membrane integrity...
May 23, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28536535/role-of-intestinal-lxr%C3%AE-in-regulating-post-prandial-lipid-excursion-and-diet-induced-hypercholesterolemia-and-hepatic-lipid-accumulation
#14
Tibiábin Benítez-Santana, Sarah E Hugo, Amnon Schlegel
Post-prandial hyperlipidemia has emerged as a cardiovascular risk factor with limited therapeutic options. The Liver X receptors (Lxrs) are nuclear hormone receptors that regulate cholesterol elimination. Knowledge of their role in regulating the absorption and handling of dietary fats is incomplete. The purpose of this study was to determine the role of intestinal Lxrα in post-prandial intestinal lipid transport. Using Lxrα knockout (nr1h3(-/-)) and intestine-limited Lxrα over-expressing [Tg(fabp2a:EGFP-nr1h3)] zebrafish strains, we measured post-prandial lipid excursion with live imaging in larvae and physiological methods in adults...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28536524/mitotherapy-for-fatty-liver-by-intravenous-administration-of-exogenous-mitochondria-in-male-mice
#15
Ailing Fu, Xianxun Shi, Huajing Zhang, Bin Fu
Mitochondrial dysfunction is a major and common mechanism in developing non-alcoholic fatty liver disease (NAFLD). Replacement of dysfunctional mitochondria by functional exogenous mitochondria may attenuate intrahepatic excessive lipid and recover hepatocyte function. However, no data shows that mitochondria can be systemically administrated to animals to date. Here we suggest that mitochondria isolated from hepatoma cells are used as a mitotherapy agent to treat mouse fatty liver induced by high-fat diets...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28535956/highly-unsaturated-fatty-acids-hufa-mediate-and-monitor-food-s-impact-on-health
#16
REVIEW
Bill Lands
A hyperbolic, saturable, competitive dynamic of ligand binding to metabolic enzymes and lipid mediator receptors gives non-linear dose-response interactions that need careful management when planning or interpreting nutrient-based interventions. Relatively indiscriminate metabolism during accumulation of HUFA from n-3 and n-6 nutrients allows the amounts of n-3 and n-6 nutrients to determine the HUFA balance accumulated in tissue phospholipids. However, when HUFA-based eicosanoid actions are more intense with n-6 than n-3 mediators, they cause healthy physiology to shift toward pathophysiology...
May 20, 2017: Prostaglandins & Other Lipid Mediators
https://www.readbyqxmd.com/read/28535441/enantioselective-metabolism-of-triadimefon-and-its-chiral-metabolite-triadimenol-in-lizards
#17
Qiuxuan Shen, Jitong Li, Peng Xu, Wei Li, Guoqiang Zhuang, Yinghuan Wang
Chinese lizards (Eremias argus) were exposed to separated R-(-)-triadimefon, S-(+)-triadimefon and racemic triadimefon to evaluate enantioselective accumulation of triadimefon. After single oral administration of R-(-)-triadimefon, S-(+)-triadimefon and racemic triadimefon, the time-concentration curves in different tissues were found to be different. Triadimefon enantiomers crossed the blood-brain barrier and brain is a main target organ. The residues of triadimefon enantiomers in fat were highest after 24h indicating that fat was the main tissue of accumulation...
May 20, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28534100/dose-dependent-differential-effects-of-in-vivo-exposure-of-cadmium-on-myometrial-activity-in-rats-involvement-of-vdcc-and-ca-2-mimicking-pathways
#18
Vivek K Saroj, Udayraj P Nakade, Abhishek Sharma, Soumen Choudhury, Sunil W Hajare, Satish K Garg
Present study was undertaken to study the effect of 28-days exposure of female adult rats to cadmium (Cd) in drinking water @ 3, 10 and 30 parts per million (ppm) on myometrial responsiveness to different spasmogens and unravel the possible mechanism of alterations in myometrial activity. Cadmium and Ca(2+) levels in blood and uterus were measured by atomic absorption spectroscopy while isometric tension in myometrial strips was measured using data acquisition system-based physiograph. Dose-dependent increase in levels of cadmium was observed in both blood and uterus while calcium was increased only in the uterus as compared to those in control...
May 22, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28534083/synthetic-alpha-synuclein-fibrils-cause-mitochondrial-impairment-and-selective-dopamine-neurodegeneration-in-part-via-inos-mediated-nitric-oxide-production
#19
Victor Tapias, Xiaoping Hu, Kelvin C Luk, Laurie H Sanders, Virginia M Lee, J Timothy Greenamyre
Intracellular accumulation of α-synuclein (α-syn) are hallmarks of synucleinopathies, including Parkinson's disease (PD). Exogenous addition of preformed α-syn fibrils (PFFs) into primary hippocampal neurons induced α-syn aggregation and accumulation. Likewise, intrastriatal inoculation of PFFs into mice and non-human primates generates Lewy bodies and Lewy neurites associated with PD-like neurodegeneration. Herein, we investigate the putative effects of synthetic human PFFs on cultured rat ventral midbrain dopamine (DA) neurons...
May 22, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28533928/leucine-nicotinic-acid-synergy-stimulates-ampk-sirt1-signaling-and-regulates-lipid-metabolism-and-lifespan-in-caenorhabditis-elegans-and-hyperlipidemia-and-atherosclerosis-in-mice
#20
Antje Bruckbauer, Jheelam Banerjee, Quiang Cao, Xin Cui, Jia Jing, Lin Zha, Fenfen Li, Bingzhong Xue, Hang Shi, Michael B Zemel
BACKGROUND/AIMS: Nicotinic acid (NA), a lipid-lowering drug, serves as a source of NAD(+), the cofactor for Sirt1. Leucine (Leu) stimulates the AMPK/Sirt1 axis and amplifies the effects of other AMPK/Sirt1 activating compounds. Therefore, we tested the interactive effects of leucine and low dose NA on AMPK/Sirt1 signaling and downstream effects of lipid metabolism in cell culture, C. elegans and mice. METHODS: LDL-receptor knockout mice were fed an atherogenic Western diet supplemented with leucine (24 g/kg diet) and sub-therapeutic NA combinations (50 mg/kg diet and 250 mg/kg diet) or low therapeutic NA (1000 mg/kg diet) for 8 weeks to evaluate markers of hyperlipidemia and atherosclerosis...
2017: American Journal of Cardiovascular Disease
keyword
keyword
58184
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"