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https://www.readbyqxmd.com/read/28449430/poloxamer-surface-modified-trimethyl-chitosan-nanoparticles-for-the-effective-delivery-of-methotrexate-in-osteosarcoma
#1
Shenglong Li, Yuyuan Xiong, Xiaojing Zhang
The present work is an effort to explore the poloxamer-modified trimethyl chitosan (TMC) encapsulated MTX for osteosarcoma treatment in order to improve the therapeutic efficacy and minimize severe toxicity associated with the clinical usage of MTX. The methotrexate-loaded pluronic-chitosan nanoparticles (MTCN) was nanosized and exhibited a controlled release of drug from the carrier system. The MTCN showed higher accumulation in cell cytoplasm region evident by the high red fluorescence indicating its uptake through energy-dependent endocytosis process...
April 23, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28449183/noninferiority-trial-investigating-the-efficacy-of-a-nonantibiotic-intramammary-therapy-in-the-treatment-of-mild-to-moderate-clinical-mastitis-in-dairy-cows-with-longer-lasting-udder-diseases
#2
M Ziesch, N Wente, Y Zhang, W Zaremba, S Engl, V Krömker
A nonblinded, positively controlled, noninferiority trial was conducted to evaluate the efficacy of an alternative, nonantibiotic therapy with Masti Veyxym(®) to reduce ineffective antibiotic usage in the treatment of nonsevere clinical mastitis (CM) in cows with longer lasting udder diseases. The solely intramammary treatment with Masti Veyxym(®) (three applications, 12 hr apart) and the combined treatment with Masti Veyxym(®) and antibiotics as usual on the farm according to label of the respective product were compared with the reference treatment of solely antibiotic therapy...
April 27, 2017: Journal of Veterinary Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28449117/the-lxr-ligand-t0901317-acutely-inhibits-insulin-secretion-by-affecting-mitochondrial-metabolism
#3
Jonas Maczewsky, Jelena Sikimic, Cita Bauer, Peter Krippeit-Drews, Carmen Wolke, Uwe Lendeckel, Winfried Barthlen, Gisela Drews
The role of liver X receptor (LXR) in pancreatic beta-cell physiology and pathophysiology is still unclear. It has been postulated that chronic LXR activation in beta-cells induces lipotoxicity, a key step in the development of beta-cell dysfunction which accompanies type-2 diabetes mellitus. In most of these studies, the LXR ligand T0901317 has been administered chronically in the µmolar range to study the significance of LXR activation.In the present study, we have evaluated acute effects of T0901317 on stimulus-secretion coupling of beta-cells...
April 25, 2017: Endocrinology
https://www.readbyqxmd.com/read/28449081/the-coxiella-burnetii-type-ivb-secretion-system-t4bss-component-dota-is-released-secreted-during-infection-of-host-cells-and-during-in-vitro-growth-in-a-t4bss-dependent-manner
#4
Brandon E Luedtke, Saugata Mahapatra, Erika I Lutter, Edward I Shaw
Coxiella burnetii is a Gram-negative intracellular pathogen and is the causative agent of the zoonotic disease Q-fever. To cause disease, C. burnetii requires a functional type IVB secretion system (T4BSS) to transfer effector proteins required for the establishment and maintenance of a membrane bound parasitophorous vacuole (PV) and further modulation of host cell process. However, it is not clear how the T4BSS interacts with the PV membrane since neither a secretion pilus nor an extracellular pore forming apparatus has not been described...
April 25, 2017: Pathogens and Disease
https://www.readbyqxmd.com/read/28449038/real-time-imaging-of-single-neuronal-cell-apoptosis-in-patients-with-glaucoma
#5
Maria F Cordeiro, Eduardo M Normando, M Jorge Cardoso, Serge Miodragovic, Seham Jeylani, Benjamin M Davis, Li Guo, Sebastien Ourselin, Roger A'Hern, Philip A Bloom
Retinal cell apoptosis occurs in many ocular neurodegenerative conditions including glaucoma-the major cause of irreversible blindness worldwide. Using a new imaging technique that we have called DARC (detection of apoptosing retinal cells), which until now has only been demonstrated in animal models, we assessed if annexin 5 labelled with fluorescent dye DY-776 (ANX776) could be used safely in humans to identify retinal cell apoptosis. Eight patients with glaucomatous neurodegeneration and evidence of progressive disease, and eight healthy subjects were randomly assigned to intravenous ANX776 doses of 0...
April 26, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28448952/sepsis-and-septic-shock-pathogenesis-and-treatment-perspectives
#6
REVIEW
Hayk Minasyan
The majority of bacteremias do not develop to sepsis: bacteria are cleared from the bloodstream. Oxygen released from erythrocytes and humoral immunity kill bacteria in the bloodstream. Sepsis develops if bacteria are resistant to oxidation and proliferate in erythrocytes. Bacteria provoke oxygen release from erythrocytes to arterial blood. Abundant release of oxygen to the plasma triggers a cascade of events that cause: 1. oxygen delivery failure to cells; 2. oxidation of plasma components that impairs humoral regulation and inactivates immune complexes; 3...
April 18, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/28448860/a-unique-presentation-of-renal-cell-transformation-into-renal-cell-carcinoma-in-subcutaneous-fatty-tissue-post-twenty-year-old-healing-gun-shot-wound-a-case-report
#7
Awadh R Alqahtani, Mohammed A Alqahtani
INTRODUCTION: Renal cell carcinoma (RCC) is the most common malignancy in the genitourinary tract, and is among the 10 most common cancers in both males and females. PRESENTATION OF CASE: We report a case of a 61-year-old male who presented with a cutaneous lesion on his left back side at a site where he had undergone several surgeries - including Left nephrectomy - twenty years ago for a gun-shot wound he sustained which penetrated his abdomen. DISCUSSION: At that time pathology reports turned out to be normal, specially left kidney pathology report which was negative for any malignancy...
March 21, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28448110/heavy-metals-induce-decline-of-derivatives-of-5-methycytosine-in-both-dna-and-rna-of-stem-cells
#8
Jun Xiong, Xiaona Liu, Qing-Yun Cheng, Shan Xiao, Lai-Xin Xia, Bifeng Yuan, Yu-Qi Feng
Toxic heavy metals have been considered to be harmful environmental contaminations. The molecular mechanisms of heavy metals-induced cytotoxicity and carcinogenicity are still not well elucidated. Previous reports showed exposures to toxic heavy metals can cause change of DNA cytosine methylation (5-methylcytosine, 5-mC). However, it is still not clear whether heavy metals have effects on the recently identified new epigenetic marks in both DNA and RNA, i.e., 5-hydroxymethylcytosine (5-hmC), 5-formylcytosine (5-foC), and 5-carboxylcytosine (5-caC)...
April 27, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28448055/transient-expression-and-cellular-localization-of-recombinant-proteins-in-cultured-insect-cells
#9
Jeffrey A Fabrick, J Joe Hull
Heterologous protein expression systems are used for the production of recombinant proteins, the interpretation of cellular trafficking/localization, and the determination of the biochemical function of proteins at the sub-organismal level. Although baculovirus expression systems are increasingly used for protein production in numerous biotechnological, pharmaceutical, and industrial applications, nonlytic systems that do not involve viral infection have clear benefits but are often overlooked and underutilized...
April 20, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28448043/challenges-in-rheological-characterization-of-highly-concentrated-suspensions-a-case-study-for-screen-printing-silver-pastes
#10
Ceren Yüce, Norbert Willenbacher
A comprehensive rheological characterization of highly concentrated suspensions or pastes is mandatory for a targeted product development meeting the manifold requirements during processing and application of such complex fluids. In this investigation, measuring protocols for a conclusive assessment of different process relevant rheological parameters have been evaluated. This includes the determination of yield stress, viscosity, wall slip velocity, structural recovery after large deformation and elongation at break as well as tensile force during filament stretching...
April 10, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28447995/rapid-and-refined-cd11b-magnetic-isolation-of-primary-microglia-with-enhanced-purity-and-versatility
#11
Souvarish Sarkar, Emir Malovic, Brandon Plante, Gary Zenitsky, Huajun Jin, Vellareddy Anantharam, Arthi Kanthasamy, Anumantha G Kanthasamy
Microglia are the primary responders to central nervous system insults; however, much remains unknown about their role in regulating neuroinflammation. Microglia are mesodermal cells that function similarly to macrophages in surveying inflammatory stress. The classical (M1-type) and alternative (M2-type) activations of macrophages have also been extended to microglia in an effort to better understand the underlying interplay these phenotypes have in neuroinflammatory conditions such as Parkinson's, Alzheimer's, and Huntington's Diseases...
April 13, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28447802/potential-lipid-lowering-mechanisms-of-biochanin-a
#12
Zhaohui Xue, Qian Zhang, Wancong Yu, Haichao Wen, Xiaonan Hou, Dan Li, Xiaohong Kou
Extensive studies have demonstrated that biochanin A (BCA) has a significant hypolipidemic effect. However, its mechanism of action is not clear. In this context, the effect of BCA on a high-fat diet (HFD)-induced hyperlipidemia in mice was determined. The results showed that treatment with a medium dose of biochanin A (BM) significantly decreased low density lipoprotein cholesterol (LDL-C) 85% (from 1.196 ± 0.183 to 0.181 ± 0.0778 mM) and total cholesterol (TC) 39% (from 5.983 ± 0.128 to 3.649 ± 0.374 mM) levels, increased lipoprotein lipase (LPL) 96% (from 1...
April 27, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28447797/signal-transductions-of-beas-2b-cells-in-response-to-carcinogenic-pm2-5-exposure-based-on-microfluidic-system
#13
Lulu Zheng, Sixiu Liu, Guoshun Zhuang, Jian Xu, Qi Liu, Xinlian Zhang, Congrui Deng, Zhigang Guo, Wang Zhao, Tingna Liu, Yiqi Wang, Yuxiao Zhang, Jing Lin, Qiongzhen Wang, Guodong Sui
PM2.5 (particulate matter less than 2.5 micrometers in diameter) is considered as a harmful carcinogen. Determining the precise relationship between the chemical constituents of PM2.5 in the air and cancer progression could aid the treatment of environment related disease and establishing risk reduction strategies. Herein, we used transcriptomics (RNA-seq) and integrated microfluidic system to identify the global gene expression and differential target proteins expression induced by ambient fine particles collected from the heavy haze in China...
April 27, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28447621/direct-involvement-of-androgen-receptor-in-oxytocin-gene-expression-possible-relevance-for-mood-disorders
#14
Dan Dai, Qiao-Chu Li, Qiong-Bin Zhu, Shao-Hua Hu, Rawien Balesar, Dick Swaab, Ai-Min Bao
Oxytocin (OXT), synthesized in the hypothalamic paraventricular nucleus (PVN) and then released into different brain areas, may play a crucial role in various behaviors and neuropsychiatric disorders, including depression. Testosterone has been proposed by clinical studies to have the opposite effect of oxytocin in these disorders. We began by studying, in the postmortem hypothalamus of fifteen patients with mood disorders and fifteen matched controls, the expression of OXT in the PVN by means of immunocytochemistry (ICC) and the co-localization of OXT and androgen receptor (AR) by means of double labeling ICC...
April 27, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28447483/the-role-of-adhesions-between-homologous-cancer-cells-in-tumor-progression-and-targeted-therapy
#15
Jie Xia, Yuhao Cheng, Hang Zhang, Rutian Li, Yiqiao Hu, Baorui Liu
Adhesions between homologous cancer cells play an important role in promoting tumor progression and designing tumor-targeting methods. Known as "homologous adhesions" of cancerous cells, these are usually more specific than adhesions to normal cells and heterogenic cells, and they have been widely discovered both in vivo and in vitro. The aberrant expression of cell adhesion-related molecules (CARMs) on each species of cancer cells is mainly responsible for inducing more specific homologous adhesions. Based on the improvement of biomimetic technologies, such adhesion has been investigated and applied deeply in drug delivery systems recently...
April 27, 2017: Expert Review of Anticancer Therapy
https://www.readbyqxmd.com/read/28447215/interplay-between-recombinant-hsp70-and-proteasomes-proteasome-activity-modulation-and-ubiquitin-independent-cleavage-of-hsp70
#16
Alexey V Morozov, Tatiana M Astakhova, David G Garbuz, George S Krasnov, Natalia V Bobkova, Olga G Zatsepina, Vadim L Karpov, Michail B Evgen'ev
The heat shock protein 70 (Hsp70, human HSPA1A) plays indispensable roles in cellular stress responses and protein quality control (PQC). In the framework of PQC, it cooperates with the ubiquitin-proteasome system (UPS) to clear damaged and dysfunctional proteins in the cell. Moreover, Hsp70 itself is rapidly degraded following the recovery from stress. It was demonstrated that its fast turnover is mediated via ubiquitination and subsequent degradation by the 26S proteasome. At the same time, the effect of Hsp70 on the functional state of proteasomes has been insufficiently investigated...
April 26, 2017: Cell Stress & Chaperones
https://www.readbyqxmd.com/read/28447208/squamous-cell-carcinoma-of-the-lung-associated-with-anti-jo1-antisynthetase-syndrome-a-case-report-and-review-of-the-literature
#17
REVIEW
G Boleto, J-M Perotin, J-P Eschard, J-H Salmon
Antisynthetase syndrome is a heterogeneous idiopathic inflammatory myopathy. Anti-Jo1 is the most common antibody found in this condition. Dermatomyositis is known to be associated with malignancy, but the association between antisynthetase syndrome and malignancy is not clearly established. We report a case of an association of squamous cell carcinoma of the lung and anti-Jo1 antisynthetase syndrome. A 67-year-old man presented with polyarthritis, muscle weakness of the pelvic girdle, "mechanic's hands," and weight loss...
April 26, 2017: Rheumatology International
https://www.readbyqxmd.com/read/28447069/long-term-calorie-restriction-in-humans-is-not-associated-with-indices-of-delayed-immunologic-aging-a-descriptive-study
#18
A Janet Tomiyama, Jeffrey M Milush, Jue Lin, James M Flynn, Pankaj Kapahi, Eric Verdin, Elizabeth Sinclair, Simon Melov, Elissa S Epel
BACKGROUND: Delayed immunologic aging is purported to be a major mechanism through which calorie restriction (CR) exerts its anti-aging effects in non-human species. However, in non-obese humans, the effect of CR on the immune system has been understudied relative to its effects on the cardiometabolic system. OBJECTIVE: To examine whether CR is associated with delayed immunologic aging in non-obese humans. METHODS: We tested whether long-term CR practitioners (average 10.03 years of CR) evidenced decreased expression of T cell immunosenescence markers and longer immune cell telomeres compared to gender-, race/ethnicity-, age-, and education-matched "healthy" Body Mass Index (BMI) and "overweight"/"obese" BMI groups...
March 31, 2017: Nutrition and Healthy Aging
https://www.readbyqxmd.com/read/28446968/the-role-of-transforming-growth-factor-tgf-%C3%AE-in-the-infarcted-myocardium
#19
REVIEW
Nikolaos G Frangogiannis
The adult mammalian heart has negligible regenerative capacity. Following myocardial infarction, sudden necrosis of cardiomyocytes triggers an intense inflammatory reaction that clears the wound from dead cells and matrix debris, while activating a reparative program. A growing body of evidence suggests that members of the transforming growth factor (TGF)-β family critically regulate the inflammatory and reparative response following infarction. Although all three TGF-β isoforms (TGF-β1, -β2 and -β3) are markedly upregulated in the infarcted myocardium, information on isoform-specific actions is limited...
March 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28446689/bone-clarity-clearing-imaging-and-computational-analysis-of-osteoprogenitors-within-intact-bone-marrow
#20
Alon Greenbaum, Ken Y Chan, Tatyana Dobreva, David Brown, Deepak H Balani, Rogely Boyce, Henry M Kronenberg, Helen J McBride, Viviana Gradinaru
Bone tissue harbors unique and essential physiological processes, such as hematopoiesis, bone growth, and bone remodeling. To enable visualization of these processes at the cellular level in an intact environment, we developed "Bone CLARITY," a bone tissue clearing method. We used Bone CLARITY and a custom-built light-sheet fluorescence microscope to detect the endogenous fluorescence of Sox9-tdTomato(+) osteoprogenitor cells in the tibia, femur, and vertebral column of adult transgenic mice. To obtain a complete distribution map of these osteoprogenitor cells, we developed a computational pipeline that semiautomatically detects individual Sox9-tdTomato(+) cells in their native three-dimensional environment...
April 26, 2017: Science Translational Medicine
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