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https://www.readbyqxmd.com/read/29351316/dexmedetomidine-reduces-lipopolysaccharide-induced-neuroinflammation-sickness-behavior-and-anhedonia
#1
Ching-Hua Yeh, Liang-Po Hsieh, Ming-Chung Lin, Tsui-Shan Wei, Hui-Ching Lin, Chia-Cheng Chang, Chung-Hsi Hsing
BACKGROUND: Peripheral innate immune response may induce sickness behavior through activating microglia, excessive cytokines production, and neuroinflammation. Dexmedetomidine (Dex) has anti-inflammatory effect. We investigated the effects of Dex on lipopolysaccharide (LPS)-induced neuroinflammation and sickness behavior in mice. MATERIALS AND METHODS: BALB/c mice were intraperitoneally (i.p.) injected with Dex (50 ug/kg) or vehicle. One hour later, the mice were injected (i...
2018: PloS One
https://www.readbyqxmd.com/read/29342458/glucocorticoids-modulate-th1-and-th2-responses-in-asthmatic-mouse-models-by-inhibition-of-notch1-signaling
#2
Chengping Hu, Zhifang Li, Juntao Feng, Yongjun Tang, Ling Qin, Xinyue Hu, Yan Zhang, Ruoxi He
BACKGROUND: Notch1 has been linked to the pathogenesis of asthma due to its contribution on Th1/Th2 imbalance. γ-Secretase inhibitor (GSI) acts as an effective blocker of Notch1 signaling. Glucocorticoids (GCs) are the most effective anti-inflammatory drugs for asthma. The present study investigated the involvement of the Notch1 pathway in the anti-inflammatory effect of GCs and its association with Th1/Th2 balance. METHODS: The asthma model was established in BALB/c mice by sensitization with ovalbumin (OVA)...
January 18, 2018: International Archives of Allergy and Immunology
https://www.readbyqxmd.com/read/29342360/sustained-delivery-of-doxorubicin-via-acetalated-dextran-scaffold-prevents-glioblastoma-recurrence-after-surgical-resection
#3
Elizabeth G Graham-Gurysh, Kathryn M Moore, Andrew B Satterlee, Kevin T Sheets, Feng-Chang Lin, Eric M Bachelder, C Ryan Miller, Shawn Hingtgen, Kristy M Ainslie
The primary cause of mortality for glioblastoma (GBM) is local tumor recurrence following standard-of-care therapies, including surgical resection. With most tumors recurring near the site of surgical resection, local delivery of chemotherapy at the time of surgery is a promising strategy. Herein drug loaded polymer scaffolds with two distinct degradation profiles were fabricated to investigate the effect of local drug delivery rate on GBM recurrence following surgical resection. The novel biopolymer, acetalated dextran (Ace-DEX), was compared to commercially available polyester, poly(L-lactide) (PLA)...
January 17, 2018: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29341457/different-effects-of-dexmedetomidine-and-midazolam-on-the-expression-of-nr2b-and-gabaa-%C3%AE-1-following-peripheral-nerve-injury-in-rats
#4
Jiayu Chen, Hanjun Li, Grewo Lim, Michael F McCabe, Wei Zhao, Yunli Yang, Weiqing Ma, Na Li
Neuropathic pain is a complex, chronic pain condition and the treatment is a major clinical challenge. Recent studies have shown that two FDA approved drugs dexmedetomidine (DEX) and midazolam (MZL), may be useful in treating neuropathic pain, but the mechanism is not fully dementated. Here, we investigated the effects and mechanisms of DEX and MZL treatment in the peripheral nerve injury model. Intramuscular injection with DEX and MZL attenuated the development of mechanical allodynia and thermal hyperalgesia in rats with chronic constriction injury (CCI)...
January 17, 2018: IUBMB Life
https://www.readbyqxmd.com/read/29340293/can-sedation-using-a-combination-of-propofol-and-dexmedetomidine-enhance-the-satisfaction-of-the-endoscopist-in-endoscopic-submucosal-dissection
#5
Takashi Nonaka, Masahiko Inamori, Tetsuya Miyashita, Yumi Inoh, Kenji Kanoshima, Takuma Higurashi, Hidenori Ohkubo, Hiroshi Iida, Koji Fujita, Akihiko Kusakabe, Takahisa Gotoh, Atsushi Nakajima
Background and study aims:  The aim of this pilot randomized controlled trial was to evaluate and compare the satisfaction of the endoscopist along with the effectiveness and safety of sedation between sedation protocol using a combination of propofol (PF) and dexmedetomidine (DEX) (Combination group) and sedation protocol using PF alone (PF group) during gastric endoscopic submucosal dissection (ESD). Patients and methods : Fifty-eight patients with gastric neoplasias scheduled for gastric ESD were enrolled and randomly assigned to the two groups...
January 2018: Endoscopy International Open
https://www.readbyqxmd.com/read/29340053/indomethacin-based-stimuli-responsive-micelles-combined-with-paclitaxel-to-overcome-multidrug-resistance
#6
Shuanghu Wang, Xueying Tan, Shujuan Li, Yunfang Zhou, Peiwu Geng, Ailian Hua, Aiping Deng, Zhihong Yu
Development of multidrug resistance against antitumor agents is a major limiting factor for the successful chemotherapy. Currently, both amphiphilic polymeric micelles and chemosensitizers have been proposed to overcome MDR during chemotherapy. Herein, the redox-responsive polymeric micelles composed of dextran and indomethacin (as chemosensitizer) using a disulfide bond as the linker are prepared (DEX-SS-IND) for delivery of antitumor agent paclitaxel (PTX). The high level of glutathione in tumor cells selectively breaks the disulfide bond, leading to the rapid breakdown and deformation of redox-responsive polymeric micelles...
December 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29339763/glucocorticoid-receptor-gr%C3%AE-regulates-glucocorticoid-induced-ocular-hypertension-in-mice
#7
Gaurang C Patel, Yang Liu, J Cameron Millar, Abbot F Clark
Prolonged glucocorticoid (GC) therapy can cause GC-induced ocular hypertension (OHT), which if left untreated progresses to iatrogenic glaucoma and permanent vision loss. The alternatively spliced isoform of glucocorticoid receptor GRβ acts as dominant negative regulator of GR activity, and it has been shown that overexpressing GRβ in trabecular meshwork (TM) cells inhibits GC-induced glaucomatous damage in TM cells. The purpose of this study was to use viral vectors to selectively overexpress the GRβ isoform in the TM of mouse eyes treated with GCs, to precisely dissect the role of GRβ in regulating steroid responsiveness...
January 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29339136/development-of-orally-applicable-combinatorial-drug-loaded-nanoparticles-for-the-treatment-of-fibrosarcoma
#8
Gulen Melike Demirbolat, Levent Altintas, Sukran Yilmaz, Ismail Tuncer Degim
Nanoparticulate systems have been receiving a significant attention especially for the treatment of cancer but one of the main hurdles is to produce these developed and high tech nanosystems in large quantities. Anticancer drug formulations are generally designed for parenteral administrations but oral administration is still the most convenient route. In this study, orally applicable nano-sized chitosan nanoparticles (NPs) were successfully prepared using Nano Spray Dryer. It is possible to produce these NPs in large quantities by simply increasing the processing time using the machine without changing any parameter...
January 12, 2018: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29334299/mucoadhesive-buccal-film-containing-ornidazole-and-dexamethasone-for-oral-ulcers-in-vitro-and-in-vivo-studies
#9
Chengliang Zhang, Yanan Liu, Wei Li, Ping Gao, Dong Xiang, Xiuhua Ren, Dong Liu
A bilayered mucoadhesive buccal film containing a combination of ornidazole (OD) and dexamethasone sodium phosphate (DEX) was prepared using solvent casting to treat oral ulcers. Films were systematically evaluated in vitro to obtain the optimum formulation. The therapeutic effects of these films were investigated in the rabbit oral ulcer model and the in vivo release of OD and DEX in the human oral cavity was also evaluated. The backing layer contained ethyl cellulose and an optimal mucoadhesive layer containing both OD and DEX was produced...
January 15, 2018: Pharmaceutical Development and Technology
https://www.readbyqxmd.com/read/29331929/sex-related-differential-response-to-dexamethasone-in-endocrine-and-immune-measures-in-depressed-in-patients-and-healthy-controls
#10
Carina Rampp, Andreas Eichelkraut, Johanna Best, Darina Czamara, Monika Rex-Haffner, Manfred Uhr, Elisabeth B Binder, Andreas Menke
Although sex differences in major depression have been reported repeatedly, the underlying mechanisms are still disputed. The rapidly changing gonadal steroid concentrations of the postpartum period or during menopause have been shown to be associated with depressive symptoms and to modulate the hypothalamic-pituitary-adrenal (HPA)-axis, which is implicated in depression. The sample comprised of 128 depressed in-patients (36.7% women) and 166 healthy controls (30.0% women). Blood was collected at baseline (at 6pm) and then 3 h as well as 21 h after ingestion of 1...
January 3, 2018: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/29330561/salvage-therapy-post-pomalidomide-based-regimen-in-relapsed-refractory-myeloma
#11
Guillemette Fouquet, Lionel Karlin, Margaret Macro, Denis Caillot, Murielle Roussel, Bertrand Arnulf, Brigitte Pegourie, Marie Odile Petillon, Claire Mathiot, Cyrille Hulin, Brigitte Kolb, Anne-Marie Stoppa, Sabine Brechiniac, Philippe Rodon, Mamoun Dib, Mourad Tiab, Valentine Richez, Carla Araujo, Marc Wetterwald, Laurent Garderet, Bruno Royer, Aurore Perrot, Lotfi Benboubker, Olivier Decaux, Martine Escoffre-Barbe, Jean Paul Fermand, Philippe Moreau, Hervé Avet-Loiseau, Michel Attal, Thierry Facon, Xavier Leleu
The combination of pomalidomide and low-dose dexamethasone (Pom-Dex) has proved effective and safe in patients with end-stage relapsed/refractory multiple myeloma (RRMM), otherwise characterized by a very poor outcome. MM remains an incurable disease with unavoidable relapses, and the outcome after pomalidomide is still dismal. However, some patients demonstrate prolonged survival even beyond pomalidomide therapy.We sought to analyze the treatment of RRMM patients following Pom-Dex therapy and the response and survival after this next treatment line...
January 12, 2018: Annals of Hematology
https://www.readbyqxmd.com/read/29326850/the-efficacy-and-safety-of-intravitreal-dexamethasone-implant-for-the-treatment-of-macular-edema-related-to-retinal-vein-occlusion-real-life-data-and-prognostic-factors-in-a-turkish-population
#12
Ayşe Yağmur Kanra, Aylin Ardagil Akçakaya, Sevil Arı Yaylalı, Meltem Güzin Altınel, Neslihan Sevimli
Objectives: To evaluate the efficacy and safety of dexamethasone (DEX) implants as mono or combination therapy for macular edema in retinal vein occlusion (RVO) with real-life conditions, and to detect factors that influence final visual acuity. Materials and Methods: Twenty-five eyes with macular edema secondary to RVO underwent assessments for central macular thickness (CMT), best-corrected visual acuity (BCVA), adverse events, and also morphologic changes in optical coherence tomography at an interval of 4-8 weeks after at least one DEX implant...
December 2017: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/29321171/sgk1-foxo3-signaling-in-hypothalamic-pomc-neurons-mediates-glucocorticoid-increased-adiposity
#13
Yalan Deng, Yuzhong Xiao, Feixiang Yuan, Yaping Liu, Xiaoxue Jiang, Jiali Deng, Geza Fejes-Toth, Aniko Naray-Fejes-Toth, Shanghai Chen, Yan Chen, Hao Ying, Qiwei Zhai, Yousheng Shu, Feifan Guo
Although central nervous system has been implicated in glucocorticoid-induced fat mass gain, the underlying mechanisms are poorly understood. The aim of our current study was to investigate the possible involvement of hypothalamic serum- and glucocorticoid-regulated kinase 1 (SGK1) in glucocorticoid-increased adiposity. It is well-known that SGK1 expression is induced by acute glucocorticoid treatment, interestingly, we found its expression was decreased in the arcuate nucleus of the hypothalamus, including POMC neurons, following chronic dexamethasone (Dex) treatment...
January 10, 2018: Diabetes
https://www.readbyqxmd.com/read/29321064/the-role-of-ace2-angiotensin-1-7-and-mas1-receptor-axis-in-glucocorticoid-induced-intrauterine-growth-restriction
#14
Elham Ghadhanfar, Aseel Alsalem, Shaimaa Al-Kandari, Jumana Naser, Fawzi Babiker, Maie Al-Bader
BACKGROUND: Plasma and urine levels of the potent vasodilator Ang-(1-7) are elevated in mid and late pregnancy and are correlated with elevated placental angiogenesis, fetal blood flow, and rapid fetal growth. We hypothesized that Ang-(1-7), its receptor (Mas1) and the enzymes involved in Ang-(1-7) production (ACE2 and Membrane metallo-endopeptidase; MME) are down regulated in response to glucocorticoid administration contributing to IUGR. METHODS: Pregnant female Sprague-Dawley rats were injected with dexamethasone (DEX; 0...
December 29, 2017: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/29305605/role-of-the-autotaxin-lpa-pathway-in-dexamethasone-induced-fibrotic-responses-and-extracellular-matrix-production-in-human-trabecular-meshwork-cells
#15
Megumi Honjo, Nozomi Igarashi, Junko Nishida, Makoto Kurano, Yutaka Yatomi, Koji Igarashi, Kuniyuki Kano, Junken Aoki, Makoto Aihara
Purpose: Dexamethasone (Dex) regulates aqueous humor outflow by inducing reorganization of the cytoskeleton and extracellular matrix (ECM) production. Rho kinase (ROCK) has an important role in this process, but the upstream pathway leading to its activation remains elusive. The purpose of the study was to determine the role of autotaxin (ATX), an enzyme involved in the generation of lysophosphatidic acid (LPA), in the Dex-induced fibrotic response and ECM production in human trabecular meshwork (HTM) cells...
January 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29304735/effect-of-single-dose-dexmedetomidine-on-postoperative-recovery-after-ambulatory-ureteroscopy-and-ureteric-stenting-a-double-blind-randomized-controlled-study
#16
I I Shariffuddin, W H Teoh, S Wahab, C Y Wang
BACKGROUND: Ambulatory surgery has recently gain popularity, as it is a good method of optimizinghospital resources utilization. To support ambulatory surgery, anaesthetic goals nowrevolve around patients' early recovery with minimal pain and nausea, expedientdischarge home and prompt resumption of activities of daily living. In this study, weevaluated the effect of a single pre-induction dose of dexmedetomidine on anaestheticrequirements, postoperative pain and clinical recovery after ambulatory ureteroscopy andureteric stenting under general anaesthesia...
January 5, 2018: BMC Anesthesiology
https://www.readbyqxmd.com/read/29302209/histone-deacetylase-inhibition-attenuates-hepatic-steatosis-in-rats-with-experimental-cushing-s-syndrome
#17
Mina Kim, Hae-Ahm Lee, Hyun-Min Cho, Seol-Hee Kang, Eunjo Lee, In Kyeom Kim
Cushing's syndrome (CS) is a collection of symptoms caused by prolonged exposure to excess cortisol. Chronically elevated glucocorticoid (GC) levels contribute to hepatic steatosis. We hypothesized that histone deacetylase inhibitors (HDACi) could attenuate hepatic steatosis through glucocorticoid receptor (GR) acetylation in experimental CS. To induce CS, we administered adrenocorticotropic hormone (ACTH; 40 ng/kg/day) to Sprague-Dawley rats by subcutaneous infusion with osmotic mini-pumps. We administered the HDACi, sodium valproate (VPA; 0...
January 2018: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/29301927/dual-targeted-molecular-imaging-of-cancer
#18
Emily B Ehlerding, Lingyi Sun, Xiaoli Lan, Dexing Zeng, Weibo Cai
Molecular imaging is critical to personalized and precision medicine. While singly-targeted imaging probes are making an impact both clinically and preclinically, molecular imaging strategies employing bispecific probes have enabled improved visualization of cancer in recent years through synergistic targeting of two ligands. In this "Focus on Molecular Imaging" review, we outline how peptide-, antibody-, and nanoparticle-based platforms have impacted this emerging strategy, providing examples and pointing out areas in which the greatest clinical impact may be realized...
January 4, 2018: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29290897/dose-related-effects-of-dexmedetomidine-on-immunomodulation-and-mortality-to-septic-shock-in-rats
#19
Yan Ma, Xiang-You Yu, Yi Wang
BACKGROUND: Dexmedetomidine has already been used in septic patients as a new sedative agent, few studies have examined its effects on immunomodulation. Therefore, the authors have designed a controlled experimental study to characterize the immunomodulation effects of dexmedetomidine in the cecal ligation and puncture (CLP) model in rats. METHODS: After CLP, 48 Wistar rats were randomly allocated into four groups: (1) CLP group; (2) small-dose treatment group (2...
2018: World Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29290170/cost-effectiveness-of-drugs-to-treat-relapsed-refractory-multiple-myeloma-in-the-united-states
#20
Josh J Carlson, Gregory F Guzauskas, Richard H Chapman, Patricia G Synnott, Shanshan Liu, Elizabeth T Russo, Steven D Pearson, Elizabeth D Brouwer, Daniel A Ollendorf
BACKGROUND: New 3-drug regimens have been developed and approved to treat multiple myeloma (MM). The absence of direct comparative data and the high cost of treatment support the need to assess the relative clinical and economic outcomes across all approved regimens. OBJECTIVE: To evaluate the cost-effectiveness of treatments for relapsed and/or refractory MM from a U.S. health system perspective. METHODS: We developed a partition survival model with 3 health states (progression-free, progression, and death) to evaluate the following regimens: carfilzomib (CFZ), elotuzumab (ELO), ixazomib (IX), daratumumab (DAR), and panobinostat (PAN) in combination with lenalidomide (LEN) or bortezomib (BOR) plus dexamethasone (DEX) in the second and/or third line of therapy...
January 2018: Journal of Managed Care & Specialty Pharmacy
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