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https://www.readbyqxmd.com/read/28431428/computational-and-in-vitro-experimental-investigation-of-intrathecal-drug-distribution-parametric-study-of-the-effect-of-injection-volume-cerebrospinal-fluid-pulsatility-and-drug-uptake
#1
Kevin M Tangen, Roxanne Leval, Ankit I Mehta, Andreas A Linninger
BACKGROUND: Intrathecal drug delivery is an attractive option to circumvent the blood-brain barrier for pain management through its increased efficacy of pain relief, reduction in adverse side effects, and cost-effectiveness. Unfortunately, there are limited guidelines for physicians to choose infusion or drug pump settings to administer therapeutic doses to specific regions of the spine or the brain. Although empiric trialing of intrathecal drugs is critical to determine the sustained side effects, currently there is no inexpensive in vitro method to guide the selection of spinal drug delivery parameters...
May 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28430741/utility-of-8%C3%A2-h-and-time-decay-corrected-acquisition-scintigraphy-with-in-vitro-labeled-white-blood-cells-for-the-diagnosis-of-osteoarticular-infection
#2
Edel Noriega Álvarez, Guillermo A Martínez Pimienta, Ana M Benítez Segura, María T Bajén Lázaro, Alba Rodrígez-Gasén, Julio Rodríguez-Rubio Corona, Jaime Mora Salvadó
INTRODUCTION: Except in the spine, labeled white-blood cell scintigraphy (WBCS) with image acquisition up to 24 h is the nuclear medicine test of choice for diagnosing osteoarticular infection. However, distinguishing between inflammation and infection is a challenge. OBJECTIVES: The first aim of this study was to verify earlier research studies that used 4 and 24 h time decay-corrected acquisition (TDCA) to differentiate infection from inflammation. The second aim was to analyze whether 8 h acquisition (1-day protocol) yielded similar results as 20-24 h acquisition...
April 20, 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28430606/ketamine-administered-pregnant-rats-impair-learning-and-memory-in-offspring-via-the-creb-pathway
#3
Xinran Li, Cen Guo, Yanan Li, Lina Li, Yuxin Wang, Yiming Zhang, Yue Li, Yu Chen, Wenhan Liu, Li Gao
Ketamine has been reported to impair the capacity for learning and memory. This study examined whether these capacities were also altered in the offspring and investigated the role of the CREB signaling pathway in pregnant rats, subjected to ketamine-induced anesthesia. On the 14th day of gestation (P14), female rats were anesthetized for 3 h via intravenous ketamine injection (200 mg/Kg). Morris water maze task, contextual and cued fear conditioning, and olfactory tasks were executed between the 25th to 30th day after birth (B25-30) on rat pups, and rats were sacrificed on B30...
February 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28428080/the-effect-of-preoperative-lumbar-epidural-corticosteroid-injection-on-post-operative-infection-rate-in-patients-undergoing-single-level-lumbar-decompression
#4
Jonathan G Seavey, George C Balazs, Theodore Steelman, Melvin Helgeson, David E Gwinn, Scott C Wagner
BACKGROUND CONTEXT: Lumbar epidural corticosteroid injections (LECI) are frequently used in the treatment of lumbar intervertebral disc herniation with radiculopathy and lumbar spinal stenosis. Although widely utilized, their effect on the outcomes and complications of subsequent surgery is unclear. Post-operative infection can be a morbid complication following spine surgery, and recent literature has suggested that the risk may be increased in patients undergoing lumbar spinal surgery who had previously received LECI...
April 17, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28425086/the-clinical-benefits-of-denosumab-for-prophylaxis-of-steroid-induced-osteoporosis-in-patients-with-pulmonary-disease
#5
Shigeo Ishiguro, Kentaro Ito, Shigenori Nakagawa, Osamu Hataji, Akihiro Sudo
Previous reports demonstrated that bone density decreased rapidly during the initial few months of steroid therapy and continued decreasing at a rate of 2 to 4% annually. Our data indicates that denosumab can also play a role in the treatment of osteoporosis in the steroid-taking population. INTRODUCTION: Respiratory physicians are often faced with the dilemma that long-term steroid use will deteriorate bone mineral density and quality. Previous reports demonstrated that bone density decreased 8 to 12% during the initial few months of steroid therapy then continued decreasing at a rate of 2 to 4% annually...
December 2017: Archives of Osteoporosis
https://www.readbyqxmd.com/read/28421537/satb2-ablation-impairs-hippocampus-based-long-term-spatial-memory-and-short-term-working-memory-and-immediate-early-genes-iegs-mediated-hippocampal-synaptic-plasticity
#6
Ying Li, Qiang-Long You, Sheng-Rong Zhang, Wei-Yuan Huang, Wen-Jun Zou, Wei Jie, Shu-Ji Li, Ji-Hong Liu, Chuang-Ye Lv, Jin Cong, Yu-Ying Hu, Tian-Ming Gao, Jian-Ming Li
Special AT-rich sequence-binding protein 2 (Satb2) is a protein binding to the matrix attachment regions of DNA and important for gene regulation. Patients with SATB2 mutation usually suffer moderate to severe mental retardation. However, the mechanisms for the defects of intellectual activities in patients with SATB2 mutation are largely unclear. Here we established the heterozygous Satb2 mutant mice and Satb2 conditional knockout mice to mimic the patients with SATB2 mutation and figured out the role of Satb2 in mental activities...
April 18, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28416835/-polymethylmethacrylate-augmentation-of-bone-cement-injectable-cannulated-pedicle-screws-was-used-to-treat-degenerative-lumbar-scoliosis-with-osteoporosis
#7
H L Sun, C D Li, X W Li, X D Yi, H Liu, H L Lu, H Li, Z R Yu, Y Wang
OBJECTIVE: To describe the application of polymethylmethacrylate (PMMA) augmentation of cement-injectable cannulated pedicle screws for the treatment of degenerative lumbar scoliosis with osteoporosis. METHODS: Retrospective cohort study was used to compare cement injectable cannulated pedicle screws (CICPs) group with PMMA augmentation and control group with traditional method in the correction surgery for Lenke-silva level III and level IV degenerative scoliosis cases with osteoporosis...
April 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28410481/leg-symptoms-associated-with-sacroiliac-joint-disorder-and-related-pain
#8
Eiichi Murakami, Toshimi Aizawa, Daisuke Kurosawa, Kyoko Noguchi
OBJECTIVE: The symptoms of sacroiliac joint (SIJ) disorders are usually detected in the buttock and groin, and occasionally referred to the thigh and leg. However, lumbar disorders also cause symptoms in these same body regions. The presence of a characteristic, symptomatic pattern in the legs would be useful for diagnosing SIJ disorders. This study aimed to identify specific leg symptoms in patients with SIJ pain originating from the posterior sacroiliac ligament and determine the rate of occurrence of these symptoms...
March 30, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28406442/liposomal-encapsulation-for-systemic-delivery-of-propranolol-via-transdermal-iontophoresis-improves-bone-microarchitecture-in-ovariectomized-rats
#9
Benjamin Teong, Shyh Ming Kuo, Wei-Hsin Tsai, Mei-Ling Ho, Chung-Hwan Chen, Han Hsiang Huang
The stimulatory effects of liposomal propranolol (PRP) on proliferation and differentiation of human osteoblastic cells suggested that the prepared liposomes-encapsulated PRP exerts anabolic effects on bone in vivo. Iontophoresis provides merits such as sustained release of drugs and circumvention of first pass metabolism. This study further investigated and evaluated the anti-osteoporotic effects of liposomal PRP in ovariectomized (OVX) rats via iontophoresis. Rats subjected to OVX were administered with pure or liposomal PRP via iontophoresis or subcutaneous injection twice a week for 12 weeks...
April 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28400058/the-snk-and-spar-signaling-pathway-changes-in-hippocampal-neurons-treated-with-amyloid-beta-peptide-in-vitro
#10
Hua Sui, Libin Zhan, Xinping Niu, Lina Liang, Xin Li
Amyloid-β peptide (Aβ) is believed to be a primary cause of Alzheimer's disease. Many studies have demonstrated that Aβ causes morphological and functional alterations of dendritic spines, leading to synaptic dysfunction, but the effect of Aβ on damage to synaptic functions is not fully understood. Spine-associated Rap guanosine triphosphatase-activating protein (SPAR) is an important regulator of activity-dependent remodeling of synapses and is critically involved in both mature dendritic spine formation and the maintenance of spine maturity...
March 22, 2017: Neuropeptides
https://www.readbyqxmd.com/read/28398234/down-regulated-drebrin-aggravates-cognitive-impairments-in-a-mouse-model-of-alzheimer-s-disease
#11
Yan Liu, Yanfeng Xu, Ling Zhang, Lan Huang, Pin Yu, Hua Zhu, Wei Deng, Chuan Qin
The developmentally regulated brain protein drebrin (Dbn) is a functional protein involved with long-term memory formation and is widely distributed in brain neurons, especially in the dendritic spines. A noticeable decline of this protein has been found in the hippocampus and cortex of patients with Alzheimer's disease (AD), yet the relationship between Dbn and AD has not been fully understood. In the present study, we examined how down-regulation of Dbn impacts the progression of AD in experimental animals...
April 11, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28396242/long-term-effects-of-repeated-injections-of-local-anesthetic-with-or-without-corticosteroid-for-lumbar-spinal-stenosis-a-randomized-trial
#12
Janna L Friedly, Bryan A Comstock, Judith A Turner, Patrick J Heagerty, Richard A Deyo, Zoya Bauer, Andrew L Avins, Srdjan S Nedeljkovic, David R Nerenz, Xu Rita Shi, Thiru Annaswamy, Christopher J Standaert, Matthew Smuck, David J Kennedy, Venu Akuthota, David Sibell, Ajay D Wasan, Felix Diehn, Pradeep Suri, Sean D Rundell, Larry Kessler, Allen S Chen, Jeffrey G Jarvik
OBJECTIVE: To determine the overall long term effectiveness of treatment with epidural corticosteroid injections for lumbar central spinal stenosis and the impact of repeat injections, including crossover injections, on outcomes through 12 months. DESIGN: Multicenter, double-blind, randomized trial comparing epidural injections of corticosteroid plus lidocaine versus lidocaine alone SETTING: 16 U.S. clinical sites PARTICIPANTS: 400 participants with imaging-confirmed lumbar central spinal stenosis INTERVENTIONS: Participants were randomized to receive either epidural injections with corticosteroid plus lidocaine or lidocaine alone with the option of blinded crossover after 6 weeks to receive the alternate treatment...
April 7, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28393079/tyrosine-phosphorylation-of-nr2b-contributes-to-chronic-migraines-via-increased-expression-of-cgrp-in-rats
#13
Xiping Liang, Sha Wang, Guangcheng Qin, Jingmei Xie, Ge Tan, Jiying Zhou, Devin W McBride, Lixue Chen
Tyrosine phosphorylation of NR2B (NR2B-pTyr), a subunit of the N-methyl-D-aspartate (NMDA) receptor, has been reported to develop central sensitization and persistent pain in the spine, but its effect in chronic migraines has not been examined. We hypothesized that tyrosine phosphorylation of NR2B contributes to chronic migraines (CM) through calcitonin gene-related peptide (CGRP) in rats. Ninety-four male Sprague-Dawley rats were subjected to seven inflammatory soup (IS) injections. In a subset of animals, the time course and location of NR2B tyrosine phosphorylation were detected by western blot and immunofluorescence double staining...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28382238/evaluation-and-interventional-management-of-pain-after-vertebral-augmentation-procedures
#14
Jesse Hatgis, Michelle Granville, Robert E Jacobson
INTRODUCTION: A small subset of patients who underwent successful vertebral compression fracture (VCF) augmentation procedures may develop subsequent pain requiring spinal injections. In a retrospective analysis, we determined whether the pain was related to the original fracture site or to another area within the lumbar or thoracic spine. The pain occurred either at the same/adjacent level and/or non-adjacent level as the VCF. Interventional treatments primarily targeted the facet joints, specifically in the form of facet joint blocks and/or radiofrequency ablation to the medial branches...
February 28, 2017: Curēus
https://www.readbyqxmd.com/read/28376758/the-value-of-applying-a-melatonin-antagonist-luzindole-in-improving-the-success-rate-of-the-bipedal-rat-scoliosis-model
#15
Shuo Yang, Chaojun Zheng, Jianyuan Jiang, Feizhou Lu, Xinlei Xia, Wei Zhu, Xiang Jin, Xiaosheng Ma
BACKGROUND: An ideal animal model has always been the key to research the pathogenesis and treatment of adolescent idiopathic scoliosis (AIS), while available methods have obvious disadvantages. The deficiency of melatonin has been proved relating to AIS. In this research, we intended to apply Luzindole, the melatonin antagonist, in bipedal rat model, for the block of combination of melatonin and its receptor, to inhibit the melatonin effect, and then to understand whether this method can effectively improve the scoliosis rate of bipedal rat model, and investigate the role of melatonin in scoliosis...
April 4, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28367290/analysis-of-medical-disputes-regarding-chronic-pain-management-in-the-2009-2016-period-using-the-korean-society-of-anesthesiologists-database
#16
Jin Young Lee, Duk Kyung Kim, Da Woon Jung, Jae Young Yang, Dae Yoon Kim
BACKGROUND: The active involvement of anesthesiologists in chronic pain management has been associated with an increase in the number of related medical dispute cases. METHODS: Using the Korean Society of Anesthesiologists Legislation Committee database covering case files from July 2009 to June 2016, we explored injuries and liability characteristics in a subset of cases involving chronic pain management. RESULTS: During the study period, 58 cases were eligible for final analysis...
April 2017: Korean Journal of Anesthesiology
https://www.readbyqxmd.com/read/28358289/effect-of-local-hil-10-gene-therapy-on-experimental-periodontitis-in-ovariectomized-rats
#17
Yanfen Li, Souzhi Ma, Jianbin Guo, Jun Jiang, Kai Luo, Fuhua Yan, Yin Xiao
OBJECTIVE: To investigate the effect of local hIL-10 gene therapy on experimental periodontitis in rats and to elucidate the mechanism underlying this effect. MATERIAL AND METHODS: Experimental periodontitis was induced in ovariectomized (OVX) rats using a silk ligature. We then injected 5 μg of hIL-10 plasmid with 5 μl of liposomes or 5 μg of vector plasmid with 5 μl of liposomes into the palatal side of the gingival mucosa of the upper left second molar once every two days...
May 2017: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/28351932/seeding-and-transgenic-overexpression-of-alpha-synuclein-triggers-dendritic-spine-pathology-in-the-neocortex
#18
Sonja Blumenstock, Eva F Rodrigues, Finn Peters, Lidia Blazquez-Llorca, Felix Schmidt, Armin Giese, Jochen Herms
Although misfolded and aggregated α-synuclein (α-syn) is recognized in the disease progression of synucleinopathies, its role in the impairment of cortical circuitries and synaptic plasticity remains incompletely understood. We investigated how α-synuclein accumulation affects synaptic plasticity in the mouse somatosensory cortex using two distinct approaches. Long-term in vivo imaging of apical dendrites was performed in mice overexpressing wild-type human α-synuclein. Additionally, intracranial injection of preformed α-synuclein fibrils was performed to induce cortical α-syn pathology...
March 28, 2017: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/28350559/interventional-spine-considerations-for-dural-ectasia-in-a-patient-with-marfan-syndrome
#19
David J Kohns
For patients with Marfan syndrome who present with radicular low back pain, interventional spine providers should be familiar with dural ectasia with variable diffuse thinning of the posterior wall of the lumbar spine and sacrum. Providers should carefully weigh the risks and benefits of offering elective procedures because altered anatomy may put these patients at higher risk of dural puncture. Patient selection is essential because hydrostatic pressures and/or neural tension should also be considered as potential pain generators that may not be relieved by steroid injections...
March 27, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28344548/gsk-3%C3%AE-overexpression-alters-the-dendritic-spines-of-developmentally-generated-granule-neurons-in-the-mouse-hippocampal-dentate-gyrus
#20
Noemí Pallas-Bazarra, Asta Kastanauskaite, Jesús Avila, Javier DeFelipe, María Llorens-Martín
The dentate gyrus (DG) plays a crucial role in hippocampal-related memory. The most abundant cellular type in the DG, namely granule neurons, are developmentally generated around postnatal day P6 in mice. Moreover, a unique feature of the DG is the occurrence of adult hippocampal neurogenesis, a process that gives rise to newborn granule neurons throughout life. Adult-born and developmentally generated granule neurons share some maturational aspects but differ in others, such as in their positioning within the granule cell layer...
2017: Frontiers in Neuroanatomy
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