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https://www.readbyqxmd.com/read/28811971/preclinical-immunopet-ct-imaging-using-zr-89-labeled-anti-pd-l1-monoclonal-antibody-for-assessing-radiation-induced-pd-l1-upregulation-in-head-and-neck-cancer-and-melanoma
#1
Masahiro Kikuchi, David A Clump, Raghvendra M Srivastava, Lingyi Sun, Dexing Zeng, Julio A Diaz-Perez, Carolyn J Anderson, W Barry Edwards, Robert L Ferris
Radiation therapy (RT) can induce upregulation of programmed death ligand 1 (PD-L1) on tumor cells or myeloid cells, which may affect response to PD-1-based immunotherapy. PD-L1 upregulation during RT is a dynamic process that has been difficult to monitor during treatment. The aim of this study was to evaluate the RT-induced PD-L1 upregulation in the tumor and its microenvironment using immunoPET/CT imaging of two syngeneic murine tumor models (HPV+ head and neck squamous cell carcinoma (HNSCC) or B16F10 melanoma)...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28811936/real-life-management-of-patients-with-retinal-vein-occlusion-using-i-macula-web-platform
#2
Massimo Nicolò, Monica Bonetto, Raffaella Rosa, Donatella Musetti, Maria Musolino, Carlo Enrico Traverso, Mauro Giacomini
AIM: Real-life evaluation in the management of patients affected by macular edema secondary to retinal vein occlusion. MATERIAL AND METHODS: A retrospective, observational study using the I-Macula Web platform. RESULTS: Thirty-five patients (37 eyes; 15 females and 20 male) affected by RVO were analysed. At 12 months, there was a statistically significant improvement of best-corrected visual acuity (p = 0.0235) and central macular thickness (p < 0...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28810649/effect-of-dexmedetomidine-combined-with-sufentanil-on-preventing-emergence-agitation-in-children-receiving-sevoflurane-anesthesia-for-cleft-palate-repair-surgery
#3
Ke Luo, Jun-Mei Xu, Lin Cao, Ju Gao
The aim of the present study was to observe whether dexmedetomidine (DEX) combined with sufentanil decreased emergence agitation (EA) in children receiving sevoflurane anesthesia for cleft palate repair surgery. Children undergoing elective cleft palate repair surgery were randomly allocated into the DEX + sufentanil group (group DS; n=50) and the normal saline + fentanyl group (group SF; n=50). Patients in group DS were treated with 0.5 µg/kg DEX prior to induction of anesthesia, whereas patients in group SF received an equal volume of normal saline...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28808239/compound-a-influences-gene-regulation-of-the-dexamethasone-activated-glucocorticoid-receptor-by-alternative-cofactor-recruitment
#4
S J Desmet, N Bougarne, L Van Moortel, L De Cauwer, J Thommis, M Vuylsteke, D Ratman, R Houtman, J Tavernier, K De Bosscher
The glucocorticoid receptor (GR) is a transcription factor of which the underlying gene regulatory mechanisms are complex and incompletely understood. The non-steroidal anti-inflammatory Compound A (CpdA), a selective GR modulating compound in various cell models, has been shown to favour GR-mediated gene repression but not GR-mediated gene activation. Shifting balances towards only a particular subset of GR gene regulatory events may be of benefit in the treatment of inflammatory diseases. We present evidence to support that the combination of CpdA with Dexamethasone (DEX), a classic steroidal GR ligand, can shape GR function towards a unique gene regulatory profile in a cell type-dependent manner...
August 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28803211/melatonin-protects-chondrocytes-from-impairment-induced-by-glucocorticoids-via-nad-dependent-sirt1
#5
Wei Yang, Xiaomin Kang, Na Qin, Feng Li, Xinxin Jin, Zhengmin Ma, Zhuang Qian, Shufang Wu
Intra-articular injection of glucocorticoids is used to relieve pain and inflammation in osteoarthritis patients, which is occasionally accompanied with the serious side effects of glucocorticoids in collagen-producing tissue. Melatonin is the major hormone released from the pineal gland and its beneficial effects on cartilage has been suggested. In the present study, we investigated the protective role of melatonin on matrix degeneration in chondrocytes induced by dexamethasone (Dex). The chondrocytes isolated from mice knee joint were treated with Dex, melatonin, EX527 and siRNA targeted for SIRT6, respectively...
August 9, 2017: Steroids
https://www.readbyqxmd.com/read/28801263/glucocorticoids-regulate-mir-29c-levels-in-vascular-smooth-muscle-cells-through-transcriptional-and-epigenetic-mechanisms
#6
Tsai-Der Chuang, Omid Khorram
AIMS: The objective of this study was to determine the underlying mechanism by which glucocorticoids (GCs) induce of miR-29c expression in vascular smooth muscle cells. MAIN METHODS: QRT-PCR was used for miR-29c detection. Protein levels were determined by western blotting. Knockdown of SP1, DNMT1 and DNMT3A was achieved through transfection with their specific respective siRNAs. The effect of GCs on SP1 activity was determined by luciferase reporter assay and the methylation status in miR-29c promoter was detected by methylation specific PCR...
August 8, 2017: Life Sciences
https://www.readbyqxmd.com/read/28801231/anti-inflammatory-chromatinscape-suggests-alternative-mechanisms-of-glucocorticoid-receptor-action
#7
Kyu-Seon Oh, Heta Patel, Rachel A Gottschalk, Wai Shing Lee, Songjoon Baek, Iain D C Fraser, Gordon L Hager, Myong-Hee Sung
Despite the widespread use of glucocorticoids (GCs), their anti-inflammatory effects are not understood mechanistically. Numerous investigations have examined the effects of glucocorticoid receptor (GR) activation prior to inflammatory challenges. However, clinical situations are emulated by a GC intervention initiated in the midst of rampant inflammatory responses. To characterize the effects of a late GC treatment, we profiled macrophage transcriptional and chromatinscapes with Dexamethasone (Dex) treatment before or after stimulation by lipopolysaccharide (LPS)...
August 4, 2017: Immunity
https://www.readbyqxmd.com/read/28799579/tramadol-hydrochloride-75-mg-dexketoprofen-25-mg-oral-fixed-dose-combination-in-moderate-to-severe-acute-pain-sustained-analgesic-effect-over-a-56-h-period-in-the-postoperative-setting
#8
A Montero Matamala, M Bertolotti, M P Contini, C Guerrero Bayón, A Nizzardo, I Paredes Lario, B Pizà Vallespir, S Scartoni, G Tonini, A Capriati, A Pellacani
Multimodal analgesia constitutes a common strategy in pain management. A tramadol hydrochloride 75 mg/dexketoprofen 25 mg oral fixed combination (TRAM/DKP 75 mg/25 mg) has been recently registered and released in Europe for the treatment of moderate-to-severe acute pain. This paper provides additional analyses on the results of two phase III clinical trials (DEX-TRA-04 and DEX-TRA-05) on postoperative pain to document its sustained effect. The analysis was applied to a modified intention-to-treat population (mITT, n = 933) of patients undergoing active treatment from the first dose, to assess the sustained effect of TRAM/DKP 75 mg/25 mg on pain intensity (PI-VAS 0-100) over 56 h from first drug intake...
June 2017: Drugs of Today
https://www.readbyqxmd.com/read/28777460/phosphatidylinositol-3-kinase-inhibition-potentiates-glucocorticoid-response-in-b-cell-acute-lymphoblastic-leukemia
#9
Cecilia Evangelisti, Alessandra Cappellini, Mariana Oliveira, Rita Fragoso, João T Barata, Alice Bertaina, Franco Locatelli, Carolina Simioni, Luca M Neri, Francesca Chiarini, Annalisa Lonetti, Francesca Buontempo, Ester Orsini, Andrea Pession, Lucia Manzoli, Alberto Maria Martelli, Camilla Evangelisti
Despite remarkable progress in polychemotherapy protocols, pediatric B-cell acute lymphoblastic leukemia (B-ALL) remains fatal in around 20% of cases. Hence, novel targeted therapies are needed for patients with poor prognosis. Glucocorticoids (GCs) are drugs commonly administrated for B-ALL treatment. Activation of the phosphatidylinositol 3-kinase (PI3K)/Akt/mammalian target of rapamycin signaling pathway is frequently observed in B-ALL and contributes to GC-resistance. Here, we analyzed for the first time to our knowledge, the therapeutic potential of pan and isoform-selective PI3K p110 inhibitors, alone or combined with dexamethasone (DEX), in B-ALL leukemia cell lines and patient samples...
August 4, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28777336/development-of-ph-sensitive-dextran-derivatives-with-strong-adjuvant-function-and-their-application-to-antigen-delivery
#10
Eiji Yuba, Shinya Uesugi, Maiko Miyazaki, Yuna Kado, Atsushi Harada, Kenji Kono
To achieve efficient cancer immunotherapy, the induction of cytotoxic T lymphocyte-based cellular immunity is necessary. In order to induce cellular immunity, antigen carriers that can deliver antigen into cytosol of antigen presenting cells and can activate these cells are required. We previously developed 3-methyl glutarylated dextran (MGlu-Dex) for cytoplasmic delivery of antigen via membrane disruption ability at weakly acidic pH in endosome/lysosomes. MGlu-Dex-modified liposomes delivered model antigens into cytosol of dendritic cells and induced antigen-specific cellular immunity...
August 4, 2017: Membranes
https://www.readbyqxmd.com/read/28774644/preincision-initiation-of-dexmedetomidine-maximally-reduces-the-risk-of-junctional-ectopic-tachycardia-in-children-undergoing-ventricular-septal-defect-repairs
#11
Nischal K Gautam, Yuliya Turiy, Chandra Srinivasan
OBJECTIVE: To evaluate whether initiation of dexmedetomidine (DEX) infusion before surgical incision and cardiopulmonary bypass (CPB) versus initiation after CPB had an impact on the incidence of junctional ectopic tachycardia (JET). DESIGN: Retrospective cohort study. SETTING: Single tertiary-care cardiac center. PARTICIPANTS: Children undergoing cardiopulmonary bypass for repair of congenital heart disease involving ventricular septal defects between January 2010 and February 2013...
April 10, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28772696/effect-of-immobilized-antithrombin-iii-on-the-thromboresistance-of-polycarbonate-urethane
#12
Karin Lukas, Karin Stadtherr, Andre Gessner, Daniel Wehner, Thomas Schmid, Hans Peter Wendel, Christof Schmid, Karla Lehle
The surface of foils and vascular grafts made from a thermoplastic polycarbonate urethanes (PCU) (Chronoflex AR) were chemically modified using gas plasma treatment, binding of hydrogels-(1) polyethylene glycol bisdiamine and carboxymethyl dextran (PEG-DEX) and (2) polyethyleneimine (PEI)-and immobilization of human antithrombin III (AT). Their biological impact was tested in vitro under static and dynamic conditions. Static test methods showed a significantly reduced adhesion of endothelial cells, platelets, and bacteria, compared to untreated PCU...
March 24, 2017: Materials
https://www.readbyqxmd.com/read/28771196/preparation-and-evaluation-of-dexamethasone-dex-growth-and-differentiation-factor-5-gdf-5-surface-modified-titanium-using-%C3%AE-cyclodextrin-conjugated-heparin-cd-hep-for-enhanced-osteogenic-activity-in-vitro-and-in-vivo
#13
Dae Hyeok Yang, Sun-Jung Yoon, Deok-Won Lee
The most ideal implant models in the dental and orthopedic fields to minimize the failure rate of implantation involve the improvement of osseointegration with host bone. Therefore, a focus of this study is the preparation of surface-modified titanium (Ti) samples of disc and screw types using dexamethasone (DEX) and/or growth and differentiation factor-5 (GDF-5), as well as the evaluation of their efficacies on bone formation in vitro and in vivo. X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and contact angle measurement were used to evaluate the surface chemical composition, surface morphology and wettability, respectively...
August 3, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28763903/-role-of-roxithromycin-on-glucocorticoid-resistance-of-human-bronchial-epithelial-cells-and-its-mechanism
#14
D D Sun, T T Xu, W F Zhou, Y R Dai
Objective: To explore the effects of roxithromycin (RXM) on glucocorticoid resistance of human bronchial epithelial cells exposed to smoke and its mechanism. Methods: Beas-2B cells as the research object were grouped into: control group, 10%cigarette smoke extract (CSE) group, roxithromycin (RXM)+ 10%CSE group. With 10%CSE intervention in the 10%CSE group, 10%CSE and RXM intervention in the RXM+ 10%CSE group, complete culture solution intervention in the control group. Interleukin-8 (IL-8) levels were measured by enzyme linked immunosorbent assay (ELISA) and IL-8 inhibition rate and dexamethasone half inhibitory concentration (IC50-Dex) were calculated; the expression of histone deacetylase 2 (HDAC2) protein was detected by immunofluorescence (IF) and Western blotting (WB)...
July 25, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28762196/ultrasound-image-based-thyroid-nodule-automatic-segmentation-using-convolutional-neural-networks
#15
Jinlian Ma, Fa Wu, Tian'an Jiang, Qiyu Zhao, Dexing Kong
PURPOSE: Delineation of thyroid nodule boundaries from ultrasound images plays an important role in calculation of clinical indices and diagnosis of thyroid diseases. However, it is challenging for accurate and automatic segmentation of thyroid nodules because of their heterogeneous appearance and components similar to the background. In this study, we employ a deep convolutional neural network (CNN) to automatically segment thyroid nodules from ultrasound images. METHODS: Our CNN-based method formulates a thyroid nodule segmentation problem as a patch classification task, where the relationship among patches is ignored...
July 31, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28762033/inducible-somatic-embryogenesis-in-theobroma-cacao-achieved-using-the-dex-activatable-transcription-factor-glucocorticoid-receptor-fusion
#16
Morgan E Shires, Sergio L Florez, Tina S Lai, Wayne R Curtis
OBJECTIVES: To carry out mass propagation of superior plants to improve agricultural and silvicultural production though advancements in plant cell totipotency, or the ability of differentiated somatic plant cells to regenerate an entire plant. RESULTS: The first demonstration of a titratable control over somatic embryo formation in a commercially relevant plant, Theobroma cacao (Chocolate tree), was achieved using a dexamethasone activatable chimeric transcription factor...
July 31, 2017: Biotechnology Letters
https://www.readbyqxmd.com/read/28761693/effect-of-dexmedetomidine-in-the-prophylactic-endoscopic-injection-sclerotherapy-for-oesophageal-varices-a-study-protocol-for-prospective-interventional-study
#17
Hiroki Nishikawa, Yoshinori Iwata, Akio Ishii, Hirayuki Enomoto, Yukihisa Yuri, Noriko Ishii, Yuho Miyamoto, Kunihiro Hasegawa, Chikage Nakano, Ryo Takata, Takashi Nishimura, Kazunori Yoh, Nobuhiro Aizawa, Yoshiyuki Sakai, Naoto Ikeda, Tomoyuki Takashima, Hiroko Iijima, Shuhei Nishiguchi
BACKGROUND: Dexmedetomidine (DEX) is a novel, highly selective α2-adrenoceptor agonist that elicits sedative, amnestic, sympatholytic and analgesic effects in patients. Several Japanese investigators have reported the clinical usefulness of DEX for sedation in endoscopic therapies for gastrointestinal malignancies; however, there have been limited data regarding the usefulness and safety of DEX for sedation during endoscopic procedures for oesophageal varices (OVs), such as endoscopic injection sclerotherapy (EIS)...
2017: BMJ Open Gastroenterology
https://www.readbyqxmd.com/read/28757391/systemic-dexmedetomidine-attenuates-mechanical-allodynia-through-extracellular-sign-db-type-2-diabetic-mice
#18
Hui Chen, Xiang Xu, Xiao-Yu Yang, Bing-Yu Ling, He-Ping Sun, Chao Liu, Yu Qiu Zhang, Hong Cao, Lan Xu
Painful diabetic neuropathy (PDN) is a common complication of diabetes mellitus. However, the treatment for PDN is limited in clinical practice. In the present study, we investigated the effect of systemic administration dexmedetomidine (DEX), a selective alpha 2 adrenergic receptor (α2AR) agonist, on mechanical allodynia and its underlying mechanism in db/db mice, an animal model of type 2 diabetes mellitus. Our data demonstrated that db/db mice develop mechanical allodynia at the early stage of diabetes...
July 28, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28756742/pentablock-copolymer-dexamethasone-nanoformulations-elevate-myoc-in-vitro-liberation-activity-and-safety-in-human-trabecular-meshwork-cells
#19
Vibhuti Agrahari, Guorong Li, Vivek Agrahari, Iris Navarro, Kristin Perkumas, Abhirup Mandal, W Daniel Stamer, Ashim K Mitra
AIM: The aim of this study is to examine the elevation of MYOC in long-term treatment of human trabecular meshwork (HTM) cells using dexamethasone (DEX) encapsulated pentablock (PB) copolymer-based nanoparticles (NPs) (DEX-PB-NPs). MATERIALS & METHODS: PB copolymers and DEX-PB-NPs were synthesized and characterized using nuclear magnetic resonance, gel permeation chromatography, and X-ray diffraction analyses. MYOC levels secreted from HTM cells were measured by western blot (WB) analysis...
August 2017: Nanomedicine
https://www.readbyqxmd.com/read/28755856/th9-cells-induce-steroid-resistant-bronchial-hyperresponsiveness-in-mice
#20
Mayumi Saeki, Osamu Kaminuma, Tomoe Nishimura, Noriko Kitamura, Akio Mori, Takachika Hiroi
BACKGROUND: Reduced responsiveness to corticosteroid therapy is a major problem for patients with severe asthma. Although Th9 cells, along with Th2 cells, facilitate antigen-induced airway eosinophilia and bronchial hyperresponsiveness (BHR), the sensitivity of Th9 cell-mediated responses to steroid therapy remains unknown. In this study, we investigated the effect of dexamethasone (Dex) on antigen-induced airway inflammation in Th9 cell-transferred mice. METHODS: Ovalbumin (OVA)-specific Th2 and Th9 cells were polarized from the CD4(+) T cells of DO11...
July 26, 2017: Allergology International: Official Journal of the Japanese Society of Allergology
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