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https://www.readbyqxmd.com/read/28535567/radiation-dose-and-procedure-time-for-994-ct-guided-spine-pain-control-procedures
#1
Matthew S Lazarus, Rebecca B Forman, Alan L Brook, Todd S Miller
BACKGROUND: Image guidance for spine pain control procedures, including epidural steroid injection, nerve root block, and facet block, can be performed with either computed tomography (CT) or conventional fluoroscopy. CT has the advantage of improved anatomic localization and use of air for contrast; however, there are concerns that CT leads to higher radiation dose and longer procedure time. OBJECTIVE: To evaluate procedure time and radiation dose for multiple types of spine pain control procedures performed under CT guidance...
May 2017: Pain Physician
https://www.readbyqxmd.com/read/28534954/uncaria-alkaloids-reverse-abcb1-mediated-cancer-multidrug-resistance
#2
Bao-Yuan Huang, Yu Zeng, Ying-Jie Li, Xiao-Jun Huang, Nan Hu, Nan Yao, Min-Feng Chen, Zai-Gang Yang, Zhe-Sheng Chen, Dong-Mei Zhang, Chang-Qing Zeng
The overexpression of ATP-binding cassette (ABC) transporters is the main cause of cancer multidrug resistance (MDR), which leads to chemotherapy failure. Uncaria alkaloids are the major active components isolated from uncaria, which is a common Chinese herbal medicine. In this study, the MDR-reversal activities of uncaria alkaloids, including rhynchophylline, isorhynchophylline, corynoxeine, isocorynoxeine (Icory), hirsutine and hirsuteine, were screened; they all exhibited potent reversal efficacy when combined with doxorubicin...
May 17, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28534285/development-of-self-forming-doxorubicin-loaded-polymeric-depots-as-an-injectable-drug-delivery-system-for-liver-cancer-chemotherapy
#3
Pinunta Nittayacharn, Norased Nasongkla
The objective of this work was to develop self-forming doxorubicin-loaded polymeric depots as an injectable drug delivery system for liver cancer chemotherapy and studied the release profiles of doxorubicin (Dox) from different depot formulations. Tri-block copolymers of poly(ε-caprolactone), poly(D,L-lactide) and poly(ethylene glycol) named PLECs were successfully used as a biodegradable material to encapsulate Dox as the injectable local drug delivery system. Depot formation and encapsulation efficiency of these depots were evaluated...
July 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28533220/triptolide-assisted-phosphorylation-of-p53-suppresses-inflammation-induced-nf-%C3%AE%C2%BAb-survival-pathways-in-cancer-cells
#4
Li Zheng, Jia Jia, Huifang Dai, Lei Wan, Jian Liu, Lin Hu, Mian Zhou, Michael Qiu, Xufeng Chen, Lufen Chang, Jae Y Kim, Karen Reckamp, Dan J Raz, Zongping Xia, Binghui Shen
Chronic inflammation plays important roles in cancer initiation and progression. Resolving chronic inflammation or blocking inflammatory signal transduction may prevent cancer development. Here, we report that the combined low-dose use of two anti-inflammatory drugs, aspirin and triptolide, reduces spontaneous lung cancer incidence from 70% to 10% in a mouse model. Subsequent studies reveal that such treatment has little effect in resolving chronic inflammatory conditions in the lung, but it significantly blocks NF-κB-mediated expression of proliferation and survival genes in cancer cells...
May 22, 2017: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/28530730/evaluation-of-electronic-polarization-energy-in-oligoacene-molecular-crystals-using-the-solvated-supermolecular-approach
#5
Tao Xu, Wenliang Wang, Shiwei Yin, Yun Wang
The solvated supermolecular approach, i.e., block-localized wave function coupled with polarizable continuum model (BLW/PCM), was proposed to calculate molecular ionization potential (IP), electron affinity (EA) in the solid phase, and related electronic polarization. Via the calculations of a solvated supermolecule (5M), including four closest molecules, BLW/PCM overcomes the limitation in the calculation for the monomer PCM, that is, nearly same electronic polarization for cation (P+) and anion (P-). The solvated supermolecular approach successfully described asymmetric behaviors of P+ and P- for oligoacene crystals...
May 22, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28529269/possible-role-of-ppar%C3%AE-in-the-negative-regulation-of-ovulatory-cascade-and-luteal-development-in-rats
#6
Ryohei Funahashi, Takanobu Sakamoto, Norihito Taguchi, Ryosuke Naiki, Ryota Terashima, Mitsumori Kawaminami, Shiro Kurusu
Peroxisome proliferator-activated receptor γ (PPARγ), a member of a nuclear receptor family, has been shown to be implicated in various reproductive processes. Here, we evaluated possible roles of PPARγ in ovulation and luteal development in a gonadotropins-primed immature rat model. Immunoreactive PPARγ was expressed in granulosa cells of eCG-stimulated mature follicles, and its expression level decreased following ovulatory hCG stimulus. Intra-bursal treatment with rosiglitazone (a PPARγ agonist) simultaneously with subcutaneously administered hCG blocked the induction of cyclooxygenase-2 and steroidogenic acute regulatory protein (StAR) in preovulatory follicles...
May 19, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28529154/habitat-heterogeneity-hypothesis-and-edge-effects-in-model-metacommunities-marked-manuscript
#7
Michaela Hamm, Barbara Drossel
Spatial heterogeneity is an inherent property of any living environment and is expected to favour biodiversity due to a broader niche space. Furthermore, edges between different habitats can provide additional possibilities for species coexistence. Using computer simulations, this study examines metacommunities consisting of several trophic levels in heterogeneous environments in order to explore the above hypotheses on a community level. We model heterogeneous landscapes by using two different sized resource pools and evaluate the combined effect of dispersal and heterogeneity on local and regional species diversity...
May 18, 2017: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/28529036/qx-oh-a-qx-314-derivative-agent-produces-long-acting-local-anesthesia-in-rats
#8
YuJun Zhang, Jun Yang, QinQin Yin, LingHui Yang, Jin Liu, WenSheng Zhang
QX-314 has been shown to produce long-acting local anesthesia in vivo in animals; however, translation to humans has been impeded by concerns about toxicity. We investigated whether the newly emerged QX-OH molecule could confer long-lasting anesthesia with a low local toxicity in rats. In rat sciatic nerve block model, QX-OH 25mM produced a longer sensory block than QX-314 25mM (median [25th, 75th percentiles], 5.5 [4.25, 6] h vs. 3 [3, 4] h; P=0.03). QX-OH 35mM produced a longer sensory block than QX-314 35mM (8 [6, 12] h vs...
May 18, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28528636/correlative-two-photon-and-serial-block-face-scanning-electron-microscopy-in-neuronal-tissue-using-3d-near-infrared-branding-maps
#9
Robert M Lees, Christopher J Peddie, Lucy M Collinson, Michael C Ashby, Paul Verkade
Linking cellular structure and function has always been a key goal of microscopy, but obtaining high resolution spatial and temporal information from the same specimen is a fundamental challenge. Two-photon (2P) microscopy allows imaging deep inside intact tissue, bringing great insight into the structural and functional dynamics of cells in their physiological environment. At the nanoscale, the complex ultrastructure of a cell's environment in tissue can be reconstructed in three dimensions (3D) using serial block face scanning electron microscopy (SBF-SEM)...
2017: Methods in Cell Biology
https://www.readbyqxmd.com/read/28526784/trpv4-mediates-the-calcium-influx-required-for-flightless-non-muscle-myosin-interaction-and-collagen-remodeling
#10
P D Arora, M Di Gregorio, P He, C A McCulloch
Collagen remodeling by phagocytosis requires cell extension formation, which in turn involves interaction of the actin binding protein Flightless I (FliI) with non-muscle myosin IIA (NMMIIA) at cell-matrix adhesion sites. As Ca(2+) plays a central role in controlling actomyosin-dependent functions, we examined how Ca(2+) controls the generation of cell extensions and collagen remodeling. Ratio fluorimetry demonstrated localized Ca(2+) influx at extensions of fibroblasts. Western Blotting and qPCR showed high expression levels of the Ca(2+)-permeable, Transient Receptor Potential Vanilloid-4 (TRPV4) channel, which co-immunoprecipitated with β1 integrin and localized to adhesions...
May 19, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28526538/trastuzumab-emtansine-versus-treatment-of-physician-s-choice-in-patients-with-previously-treated-her2-positive-metastatic-breast-cancer-th3resa-final-overall-survival-results-from-a-randomised-open-label-phase-3-trial
#11
Ian E Krop, Sung-Bae Kim, Antonio Gonzalez Martin, Patricia M LoRusso, Jean-Marc Ferrero, Tanja Badovinac-Crnjevic, Silke Hoersch, Melanie Smitt, Hans Wildiers
BACKGROUND: In the randomised, parallel assignment, open-label, phase 3 TH3RESA study, progression-free survival was significantly longer with trastuzumab emtansine versus treatment of physician's choice in previously treated patients with HER2-positive advanced breast cancer. We report results from the final overall survival analysis of the TH3RESA trial. METHODS: Eligible patients for the TH3RESA trial were men and women (aged ≥18 years) with centrally confirmed HER2-positive advanced breast cancer previously treated with both trastuzumab and lapatinib (advanced setting) and a taxane (any setting) and with progression on two or more HER2-directed regimens in the advanced setting...
May 16, 2017: Lancet Oncology
https://www.readbyqxmd.com/read/28526464/-transient-horner-s-syndrome-after-single-shot-paravertebral-block
#12
Birzat Emre Gölboyu, Mürsel Ekinci, Pınar Karaca Baysal, Ayşe Nur Yeksan, Erkan Cem Çelik, Zeynep Bilgi, Murat Aksun
BACKGROUND: Thoracic paravertebral block can provide analgesia for unilateral chest surgery and is associated with a low complication rate. Horner syndrome also referred to as oculosympathetic paresis, is a classic neurologic constellation of ipsilateral blepharoptosis, pupillary miosis, and facial anhidrosis resulting from disruption of the sympathetic pathway supplying the head, eye, and neck. CASE REPORT: We present a patient with an ipsilateral transient Horner syndrome after ultrasound guided single shot of 15mL 0...
May 17, 2017: Revista Brasileira de Anestesiologia
https://www.readbyqxmd.com/read/28526152/pharmacologic-properties-of-novel-local-anesthetic-agents-in-anesthesia-practice
#13
REVIEW
Chih H King, Sascha S Beutler, Alan D Kaye, Richard D Urman
Therapeutic duration of traditional local anesthetics when used in peripheral nerve blocks is normally limited. This article describes novel approaches to extend the duration of peripheral nerve blocks currently available or in development. Three newer approaches on extending the duration of peripheral nerve blocks include site-1 sodium channel blockers, novel local anesthetics delivery systems, and novel adjuvants of local anesthetics. Compared with plain amide-based and ester-based local anesthetics, alternative approaches show significant promise in decreasing postoperative pain, rescue opioid requirement, hospital length-of-stay, and overall health care cost, without compromising the established safety profile of traditional local anesthetics...
June 2017: Anesthesiology Clinics
https://www.readbyqxmd.com/read/28526047/the-paradigm-of-eave-tubes-scaling-up-house-improvement-and-optimizing-insecticide-delivery-against-disease-transmitting-mosquitoes
#14
Fredros Okumu
Control of mosquito-borne diseases is greatly compromised by spread of insecticide resistance, high implementation costs and sub-optimal compliance among users. Improved housing has potential to reduce malaria transmission nearly as much as long-lasting insecticide-treated nets (LLINs), while also preventing other arthropod-borne diseases and improving overall well-being. Yet, it is hardly promoted as mainstream intervention, partly because of high costs, minimal communal benefits to people in non-improved houses, and low scalability...
May 19, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28525956/aggregation-induced-emission-fluorogens-light-cells-via-microtubules-accessing-the-mechanisms-of-intracellular-trafficking-of-ionic-substances
#15
Shixin Zhou, Yijun Xia, Yinan Liu, Qihua He, Bo Song
Understanding the enrichment and intracellular trafficking of substances is centrally important to the biological systems. Here, employing an amphiphilic molecule (denoted by TPE-11) bearing tetraphenylethene moiety, known for aggregation induced emission property, we demonstrated its localization shifting in Hela cells after prolonged incubation. Through a set of delicately designed experiments, we found that one type of cytoskeleton, i.e. microtubule, is responsible for the intracellular transportation regardless of the sources of fluorogens, via endocytosis pathways or not...
May 19, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28525920/torsade-de-pointes-arrhythmias-arise-at-the-site-of-maximal-heterogeneity-of-repolarization-in-the-chronic-complete-atrioventricular-block-dog
#16
Albert Dunnink, Thom R G Stams, Alexandre Bossu, Veronique M F Meijborg, Jet D M Beekman, Sofieke C Wijers, Jacques M T De Bakker, Marc A Vos
Aims: The chronic complete atrioventricular block (CAVB) dog is highly sensitive for drug-induced torsade de pointes (TdP) arrhythmias. Focal mechanisms have been suggested as trigger for TdP onset; however, its exact mechanism remains unclear. In this study, detailed mapping of the ventricles was performed to assess intraventricular heterogeneity of repolarization in relation to the initiation of TdP. Methods and results: In 8 CAVB animals, 56 needles, each containing 4 electrodes, were inserted in the ventricles...
May 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28525758/targeted-degradation-of-ctcf-decouples-local-insulation-of-chromosome-domains-from-genomic-compartmentalization
#17
Elphège P Nora, Anton Goloborodko, Anne-Laure Valton, Johan H Gibcus, Alec Uebersohn, Nezar Abdennur, Job Dekker, Leonid A Mirny, Benoit G Bruneau
The molecular mechanisms underlying folding of mammalian chromosomes remain poorly understood. The transcription factor CTCF is a candidate regulator of chromosomal structure. Using the auxin-inducible degron system in mouse embryonic stem cells, we show that CTCF is absolutely and dose-dependently required for looping between CTCF target sites and insulation of topologically associating domains (TADs). Restoring CTCF reinstates proper architecture on altered chromosomes, indicating a powerful instructive function for CTCF in chromatin folding...
May 18, 2017: Cell
https://www.readbyqxmd.com/read/28525514/perineural-dexmedetomidine-is-more-effective-than-clonidine-when-added-to-local-anesthetic-for-supraclavicular-brachial-plexus-block-a-systematic-review-and-meta-analysis
#18
Kariem El-Boghdadly, Richard Brull, Herman Sehmbi, Faraj W Abdallah
BACKGROUND: Clonidine, an α-2 agonist, has long been used as a local anesthetic adjunct with proven efficacy to prolong peripheral nerve block duration. Dexmedetomidine, a newer α-2 agonist, has a more favorable pharmacodynamic and safety profile; however, data comparing its efficacy as an adjunct to that of clonidine are inconsistent. We sought to compare the clinical efficacy of these 2 α-2 agonists by examining their effects on peripheral nerve block characteristics for upper extremity surgery...
June 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28523090/penetrating-craniomaxillofacial-injury-caused-by-a-pneumatic-nail-gun
#19
Kevin Jae Choi, Marisa Ann Ryan, Tracy Cheng, David Powers
Craniomaxillofacial injuries can be complex, requiring a multidisciplinary approach. The primary survey is always the first step in trauma management prior to proceeding with further evaluation and treatment. A 26-year-old man presented with a penetrating nail gun injury through the oral and nasal cavities. He did not present in extremis but required elective endotracheal intubation for intraoperative assessment and treatment. Airway management was enhanced by the use of lingual nerve and inferior alveolar nerve blocks via the Vazirani-Akinosi technique to maintain spontaneous respiration while the tongue was distracted from the palate...
June 2017: Craniomaxillofacial Trauma & Reconstruction
https://www.readbyqxmd.com/read/28522768/a-model-for-in-vivo-analysis-of-sudomotor-sympathetic-c-fiber-activation-and-human-sweat-gland-output
#20
Gary W Mack
Quantitative assessment of small fiber peripheral neuropathy often involves an evaluation of the interaction between the C-fiber sudomotor nerve and local sweat rate (SR). Typically, some sort of quantitative sudomotor axon reflex test (QSART) is performed to aid in diagnosing small fiber dysfunction. The currently used QSART demonstrates only moderate test-retest reliability and therefore limits its usefulness in tracking small fiber dysfunction. A new experimental model to examine small C-fiber function in the skin using intradermal electrical stimulation and simultaneous monitoring of SR is proposed...
May 18, 2017: Journal of Applied Physiology
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