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https://www.readbyqxmd.com/read/29104648/identification-of-key-signaling-pathways-in-cerebral-small-vessel-disease-using-differential-pathway-network-analysis
#1
Gang Zheng, Qianlei Zheng, Qianwei Xu
Cerebral small vessel disease (CSVD) primarily affects the perforating cerebral arterioles and capillaries, and results in injury to subcortical grey and white matter. Despite advances in determining the genetic basis of CSVD, the molecular mechanisms underlying the development and progression of CSVD remain unclear. The present study aimed to identify significant signaling pathways associated with CSVD based on differential pathway network analysis. Combining CSVD microarray data with human protein-protein interaction data and data from the Reactome pathway database, pathway interactions were constructed using the Spearman's correlation coefficient strategy...
November 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29083089/hmgb1-induced-angiogenesis-in-perforated-disc-cells-of-human-temporomandibular-joint
#2
Yaping Feng, Jin Ke, Pinyin Cao, Mohong Deng, Jian Li, Hengxing Cai, Qinggong Meng, Yingjie Li, Xing Long
High mobility group 1 protein (HMGB1), a highly conserved nuclear DNA-binding protein and inflammatory mediator, has been recently found to be involved in angiogenesis. Our previous study has demonstrated the elevation of HMGB1 in the tissue of perforated disc of temporomandibular joint (TMJ). Here, we investigated a novel mediator of HMGB1 in regulating hypoxia-inducible factor-1α (HIF-1α) and vascular endothelial growth factor (VEGF) to mediate angiogenesis in perforated disc cells of TMJ. HMGB1 increased the expression of HIF-1α and VEGF in a dose- and time-dependent manner in these cells...
October 30, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29066948/is-arc-mrna-unique-a-search-for-mrnas-that-localize-to-the-distal-dendrites-of-dentate-gyrus-granule-cells-following-neural-activity
#3
Christopher A de Solis, Anna A Morales, Matthew P Hosek, Alex C Partin, Jonathan E Ploski
There have been several attempts to identify which RNAs are localized to dendrites; however, no study has determined which RNAs localize to the dendrites following the induction of synaptic activity. We sought to identify all RNA transcripts that localize to the distal dendrites of dentate gyrus granule cells following unilateral high frequency stimulation of the perforant pathway (pp-HFS) using Sprague Dawley rats. We then utilized laser microdissection (LMD) to very accurately dissect out the distal 2/3rds of the molecular layer (ML), which contains these dendrites, without contamination from the granule cell layer, 2 and 4 h post pp-HFS...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/29064344/low-infection-related-re-admission-rates-in-a-retrospective-of-4725-children-with-appendicitis-using-a-clinical-pathway-in-a-tertiary-care-pediatric-center
#4
Nikolas E Marino, Kate Davenport, Mary Hilfiker, Simone Langness, Timothy Fairbanks, Erin Stucky Fisher, Robert Newbury, Allyson Andrews, Alan Wells, Juan D Chaparro, John S Bradley
BACKGROUND: Standardization of antibiotic management of appendicitis in tertiary care pediatric centers has been associated with improved outcomes. Rady Children's Hospital-San Diego implemented an appendicitis clinical pathway in 2005. We evaluated infection-related re-admission risk factors since 2010, when an electronic medical record was established, with the aim to optimize the clinical pathway. METHODS: Between January 2010 and August 2015, 4725 children with a diagnosis of appendicitis were evaluated for demographic data, pathology diagnoses, culture results, and inpatient and oral step-down antibiotic therapy regimens...
October 24, 2017: Surgical Infections
https://www.readbyqxmd.com/read/29056362/critical-appraisal-of-pathology-transmission-in-the-%C3%AE-synuclein-fibril-model-of-lewy-body-disorders
#5
Negin Nouraei, Daniel M Mason, Kristin M Miner, Michael A Carcella, Tarun N Bhatia, Benjamin K Dumm, Dishaben Soni, David A Johnson, Kelvin C Luk, Rehana K Leak
Lewy body disorders are characterized by the emergence of α-synucleinopathy in many parts of the central and peripheral nervous systems, including in the telencephalon. Dense α-synuclein(+) pathology appears in regio inferior of the hippocampus in both Parkinson's disease and dementia with Lewy bodies and may disturb cognitive function. The preformed α-synuclein fibril model of Parkinson's disease is growing in use, given its potential for seeding the self-propagating spread of α-synucleinopathy throughout the mammalian brain...
October 19, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/29047279/high-performance-photoelectronic-sensor-using-mesostructured-zno-nanowires
#6
Liping Chen, Jiabao Cui, Xia Sheng, Tengfeng Xie, Tao Xu, Xinjian Feng
Semiconductor photoelectrodes that simultaneously possess rapid charge transport and high surface area are highly desirable for efficient charges generation and collection in photoelectrochemical devices. Herein, we report mesostructured ZnO nanowires (NWs) that not only demonstrate a surface area as high as 50.7 m(2)/g, comparable to that of conventional nanoparticles (NPs), but also exhibit a 100 times faster electron transport rate than that in NP films. Moreover, using the comparison between NWs and NPs as an exploratory platform, we show that the synergistic effect between rapid charge transport and high surface area leads to a high perfor-mance photoelectronic formaldehyde sensor that exhibits a detection limit of as low as 5 ppb and a response of 1223% (at 10 ppm), which are, respectively, over 100 times lower and 20 times higher than those of conventional NPs-based device...
October 19, 2017: ACS Sensors
https://www.readbyqxmd.com/read/29044603/comorbid-masticatory-impairment-delays-recovery-from-acute-cerebral-ischemia-and-locomotor-hypoactivity-after-subarachnoid-hemorrhage-in-mice
#7
Ikuho Kojima, Tatsushi Mutoh, Kazumasu Sasaki, Yasuko Tatewaki, Yasuyuki Taki, Tatsuya Ishikawa
Tooth loss and related changes in the functionality may lead to worse outcome of stroke patients, but the link involved in this pathway remains unclear. This study aimed to determine the effect of comorbid masticatory impairment on acute cerebral ischemia and neurobehavioral outcome after experimental subarachnoid hemorrhage (SAH). Thirty C57BL/6 mice with (molar-less) or without (control) prior treatment of cutting off the upper molars (separated by at least one week), were subjected to SAH by endovascular perforation...
October 17, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28993190/secretome-from-hypoxia-conditioned-adipose-derived-mesenchymal-stem-cells-promotes-the-healing-of-gastric-mucosal-injury-in-a-rodent-model
#8
Xianfeng Xia, Philip Wai Yan Chiu, Ping Kuen Lam, Wai Ching Chin, Enders Kwok Wai Ng, James Yun Wong Lau
Studies have indicated that the definitive engraftment and transdifferentiation potential of stem cells do not seem crucial for its property of tissue repair. Our previous study showed that transplantation of adipose-derived mesenchymal stem cells (ADMSCs) enhanced the healing of sutured gastric perforation. This study aimed to investigate the paracrine role of ADMSCs in the experimental gastric mucosal injury. Normoxia-conditioned medium (Nor CM) and hypoxia (HPO) CM were obtained after culturing ADMSCs in 20% O2 and 5% O2 for 48h...
October 6, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28992159/compliance-with-accreditation-and-recommended-hospital-care-a-danish-nationwide-population-based-study
#9
Anne Mette Falstie-Jensen, Søren Bie Bogh, Erik Hollnagel, Søren Paaske Johnsen
Objective: To examine the association between compliance with accreditation and recommended hospital care. Design: A Danish nationwide population-based follow-up study based on data from six national, clinical quality registries between November 2009 and December 2012. Setting: Public, non-psychiatric Danish hospitals. Participants: Patients with acute stroke, chronic obstructive pulmonary disease, diabetes, heart failure, hip fracture and bleeding/perforated ulcers...
October 1, 2017: International Journal for Quality in Health Care
https://www.readbyqxmd.com/read/28987281/the-effects-of-the-5-ht7-receptor-on-hippocampal-long-term-potentiation-and-apoptosis-in-a-rat-model-of-alzheimer-s-disease
#10
Nasrin Hashemi-Firouzi, Alireza Komaki, Sara Soleimani Asl, Siamak Shahidi
Alzheimer's disease (AD) is the most common neurodegenerative disorder involving synaptic loss and impairments in learning and memory. Long-term potentiation (LTP) of synaptic function is a model of learning- and memory-related neural plasticity, of which serotonin (5-HT) is a key modulator in the hippocampus. As the 5-HT7 receptor subtype is implicated in hippocampal neuronal function, dendritic rearrangement, and neurogenesis, the aim of this study was to assess the effect of 5-HT7 receptor activation on hippocampal synaptic plasticity and apoptosis in a rat model of AD...
October 5, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28986282/exendin-4-attenuates-neuronal-death-via-glp-1r-pi3k-akt-pathway-in-early-brain-injury-after-subarachnoid-hemorrhage-in-rats
#11
Zhiyi Xie, Budbazar Enkhjargal, Lingyun Wu, Keren Zhou, Chengmei Sun, Xin Hu, Vadim Gospodarev, Jiping Tang, Chao You, John H Zhang
Neuronal apoptosis is considered to be a crucial therapeutic target against early brain injury (EBI) after subarachnoid hemorrhage (SAH). Emerging evidence indicates that Exendin-4 (Ex-4), a glucagon-like peptide 1 receptor (GLP-1R) agonist, plays a neuroprotective role in cerebrovascular disease. This study was conducted in order to verify the neuroprotective role of EX-4 in EBI after SAH in rats. The endovascular perforation model of SAH was performed in Sprague-Dawley rats (n = 153). Ex-4 was intraperitoneally injected 1 h after SAH induction in the rats (SAH + Ex-4)...
October 4, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28947749/exploitation-of-a-newly-identified-entry-pathway-into-the-malaria-parasite-infected-erythrocyte-to-inhibit-parasite-egress
#12
Svetlana Glushakova, Brad L Busse, Matthias Garten, Josh R Beck, Rick M Fairhurst, Daniel E Goldberg, Joshua Zimmerberg
While many parasites develop within host cells to avoid antibody responses and to utilize host cytoplasmic resources, elaborate egress processes have evolved to minimize the time between escaping and invading the next cell. In human erythrocytes, malaria parasites perforate their enclosing erythrocyte membrane shortly before egress. Here, we show that these pores clearly function as an entry pathway into infected erythrocytes for compounds that inhibit parasite egress. The natural glycosaminoglycan heparin surprisingly inhibited malaria parasite egress, trapping merozoites within infected erythrocytes...
September 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28942228/perforated-jejunal-diverticulitis-in-a-nonagenarian-veteran-a-case-report
#13
Jordan Grubbs, Sergio Huerta
INTRODUCTION: Jejunal diverticular (JD) disease is an uncommon occurrence that frequently present as a diagnostic dilemma. The correct diagnosis from complications of JD is typically made at laparotomy. Most JD are asymptomatic. Of clinically significant small bowel diverticula, only 15% present with surgical problems including obstruction, gastrointestinal bleed, and perforation. PRESENTATION OF CASE: A 90-year-old man presented to the hospital with abdominal pain...
2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28940305/in-vivo-visualization-of-the-final-stages-of-xylem-vessel-refilling-in-grapevine-vitis-vinifera-stems
#14
Craig R Brodersen, Thorsten Knipfer, Andrew J McElrone
Embolism removal is critical for restoring hydraulic pathways in some plants, as residual gas bubbles should expand when vessels are reconnected to the transpiration stream. Much of our understanding of embolism removal remains theoretical as a consequence of the lack of in vivo images of the process at high magnification. Here, we used in vivo X-ray micro-computed tomography (microCT) to visualize the final stages of xylem refilling in grapevine (Vitis vinifera) paired with scanning electron microscopy. Before refilling, vessel walls were covered with a surface film, but vessel perforation plate openings and intervessel pits were filled with air...
September 20, 2017: New Phytologist
https://www.readbyqxmd.com/read/28935397/standardization-of-care-for-pediatric-perforated-appendicitis-improves-outcomes
#15
Yasmine Yousef, Fouad Youssef, Michael Homsy, Trish Dinh, Kartikey Pandya, Hayden Stagg, Robert Baird, Jean-Martin Laberge, Dan Poenaru, Pramod Puligandla, Kenneth Shaw, Sherif Emil
BACKGROUND: The treatment of perforated appendicitis in children is characterized by significant variability in care, morbidity, resource utilization, and outcomes. We prospectively studied how minimization of care variability affects outcomes. METHODS: A clinical pathway for perforated appendicitis, in use for three decades, was further standardized in May 2015 by initiation of a disease severity classification, refinement of discharge criteria, standardization of the operation, and establishment of criteria for use of postoperative total parenteral nutrition, imaging, and invasive procedures...
September 5, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28928429/nrf2-ho-1-mediates-the-neuroprotective-effect-of-mangiferin-on-early-brain-injury-after-subarachnoid-hemorrhage-by-attenuating-mitochondria-related-apoptosis-and-neuroinflammation
#16
Zefeng Wang, Songxue Guo, Junxing Wang, Yuanyuan Shen, Jianmin Zhang, Qun Wu
Early brain injury (EBI) is involved in the process of cerebral tissue damage caused by subarachnoid hemorrhage (SAH), and multiple mechanisms, such as apoptosis and inflammation, participate in its development. Mangiferin (MF), a natural C-glucoside xanthone, has been reported to exert beneficial effects against several types of organ injury by influencing various biological progresses. The current study aimed to investigate the potential of MF to protect against EBI following SAH via histological and biological assessments...
September 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28922187/novel-histologic-finding-adipose-tissue-is-prevalent-within-penile-tunica-albuginea-and-corpora-cavernosa-an-anatomic-study-of-63-specimens-and-considerations-for-cancer-invasion
#17
Ingrid M Rodriguez, Martin Cuevas, Arturo Silvero, Sofía Cañete-Portillo, Diego F Sanchez, Jose Barreto, Antonio L Cubilla
Adipose tissue, along with arteries, veins, and peripheral nerves, is a normal constituent of mesenchymal tissues encasing the corpora cavernosa at the level of the penile shaft, variously designated as penile fascia or Bucks fascia. To our knowledge, the presence of fat has not been previously reported within the corpora cavernosa. One or 2 transversal histologic sections at the level of the surgical margin at the shaft of 63 consecutive partial penectomy specimens for squamous cell carcinoma were evaluated...
November 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28900826/comparative-examination-of-temporal-glyoxalase-1-variations-following-perforant-pathway-transection-excitotoxicity-and-controlled-cortical-impact-injury
#18
Philipp Pieroh, Daniel-Christoph Wagner, Beat Alessandri, Mojgan Dabbagh Nazari, Angela Ehrlich, Chalid Ghadban, Constance Hobusch, Gerd Birkenmeier, Faramarz Dehghani
Following acute neuronal lesions, metabolic imbalance occurs, the rate of glycolysis increases, and methylglyoxal (MGO) forms, finally leading to metabolic dysfunction and inflammation. The glyoxalase system is the main detoxification system for MGO and is impaired following excitotoxicity and stroke. However, it is not known yet whether alterations of the glyoxalase system are also characteristic for other neuronal damage models. Neuronal damage was induced in organotypic hippocampal slice cultures by transection of perforant pathway (PPT; 5 min to 72 h) and N-methyl-D-aspartate (NMDA; 50 μM for 4 h) or in vivo after controlled cortical impact (CCI) injury (2 h to 14 days)...
September 12, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/28879460/vitamin-b6-reduces-neurochemical-and-long-term-cognitive-alterations-after-polymicrobial-sepsis-involvement-of-the-kynurenine-pathway-modulation
#19
Lucinéia Gainski Danielski, Amanda Della Giustina, Mariana Pereira Goldim, Drielly Florentino, Khiany Mathias, Leandro Garbossa, Rosiane de Bona Schraiber, Ana Olívia Martins Laurentino, Marina Goulart, Monique Michels, Karina Barbosa de Queiroz, Markus Kohlhof, Gislaine Tezza Rezin, Jucélia Jeremias Fortunato, Joao Quevedo, Tatiana Barichello, Felipe Dal-Pizzol, Roney S Coimbra, Fabricia Petronilho
Neurological dysfunction as a result of neuroinflammation has been reported in sepsis and cause high mortality. High levels of cytokines stimulate the formation of neurotoxic metabolites by kynurenine (KYN) pathway. Vitamin B6 (vit B6) has anti-inflammatory and antioxidant properties and also acts as a cofactor for enzymes of the KYN pathway. Thus, by using a relevant animal model of polymicrobial sepsis, we studied the effect of vit B6 on the KYN pathway, acute neurochemical and neuroinflammatory parameters, and cognitive dysfunction in rats...
September 6, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28867591/heteromeric-trpv4-trpc1-channels-mediate-calcium-sensing-receptor-induced-nitric-oxide-production-and-vasorelaxation-in-rabbit-mesenteric-arteries
#20
Harry Z E Greenberg, Simonette R E Carlton-Carew, Dhanak M Khan, Alexander K Zargaran, Kazi S Jahan, W-S Vanessa Ho, Anthony P Albert
Stimulation of calcium-sensing receptors (CaSR) by increasing the external calcium concentration (Ca(2+)]o) induces endothelium-dependent vasorelaxation through nitric oxide (NO) production and activation of intermediate Ca(2+)-activated K(+) currents (IKCa) channels in rabbit mesenteric arteries. The present study investigates the potential role of heteromeric TRPV4-TRPC1 channels in mediating these CaSR-induced vascular responses. Immunocytochemical and proximity ligation assays showed that TRPV4 and TRPC1 proteins were expressed and co-localised at the plasma membrane of freshly isolated endothelial cells (ECs)...
September 2017: Vascular Pharmacology
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