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https://www.readbyqxmd.com/read/28888583/fda-warning-on-anesthesia-and-brain-development-implications-for-obstetric-and-fetal-surgery
#1
Olutoyin A Olutoye, Byron Wycke Baker, Michael A Belfort, Oluyinka O Olutoye
There has been growing concern about the detrimental effects of certain anesthetic agents on the developing brain. Preclinical studies in small animal models as well as non-human primates, have suggested loss or death of brain cells and consequent impaired neurocognitive function following anesthetic exposure in neonates and late gestation fetuses. Human studies in this area are limited and currently inconclusive. On December 14, 2016, the United States Food and Drug administration (FDA) issued a warning regarding impaired brain development in children following exposure to certain anesthetic agents used for general anesthesia, namely the inhalational anesthetics isoflurane, sevoflurane, desflurane, and the intravenous agents, Propofol and midazolam, in the third trimester of pregnancy...
September 6, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28872113/organotypic-hippocampal-slice-cultures-as-a-model-to-study-neuroprotection-and-invasiveness-of-tumor-cells
#2
Urszula Grabiec, Tim Hohmann, Niels Hammer, Faramarz Dehghani
In organotypic hippocampal slice cultures (OHSC), the morphological and functional characteristics of both neurons and glial cells are well preserved. This model is suitable for addressing different research questions that involve studies on neuroprotection, electrophysiological experiments on neurons, neuronal networks or tumor invasion. The hippocampal architecture and neuronal activity in multisynaptic circuits are well conserved in OHSC, even though the slicing procedure itself initially lesions and leads to formation of a glial scar...
August 27, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28864519/john-maelor-gittins
#3
Graham Duncanson
John Gittins was a small animal vet who excelled at surgery.
September 2, 2017: Veterinary Record
https://www.readbyqxmd.com/read/28857799/age-at-exposure-to-surgery-and-anesthesia-in-children-and-association-with-mental-disorder-diagnosis
#4
Caleb Ing, Ming Sun, Mark Olfson, Charles J DiMaggio, Lena S Sun, Melanie M Wall, Guohua Li
BACKGROUND: Animals exposed to anesthetics during specific age periods of brain development experience neurotoxicity, with neurodevelopmental changes subsequently observed during adulthood. The corresponding vulnerable age in children, however, is unknown. METHODS: An observational cohort study was performed using a longitudinal dataset constructed by linking individual-level Medicaid claims from Texas and New York from 1999 to 2010. This dataset was evaluated to determine whether the timing of exposure to anesthesia ≤5 years of age for a single common procedure (pyloromyotomy, inguinal hernia, circumcision outside the perinatal period, or tonsillectomy and/or adenoidectomy) is associated with increased subsequent risk of diagnoses for any mental disorder, or specifically developmental delay (DD) such as reading and language disorders, and attention deficit hyperactivity disorder (ADHD)...
August 29, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28855139/the-effect-of-an-acute-systemic-inflammatory-insult-on-the-chronic-effects-of-a-single-mild-traumatic-brain-injury
#5
Lyndsey E Collins-Praino, Alina Arulsamy, Viythia Katharesan, Frances Corrigan
A small but significant proportion of mild traumatic brain injury (mTBI) sufferers will report persistent symptoms, including depression, anxiety and cognitive deficits, in the months, or even years, following the initial event. This is known as post-concussion syndrome and its pathogenesis is not yet known. This study sought to investigate the role of a peripheral inflammatory insult in the development of ongoing behavioral symptoms following a mTBI. To investigate, male Sprague-Dawley rats were administered a single mTBI using the diffuse impact-acceleration model to generate ∼100G of force...
August 29, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28839000/radiosensitisation-in-vivo-by-histone-deacetylase-inhibition-with-no-increase-in-early-normal-tissue-radiation-toxicity
#6
Blaz Groselj, Jia-Ling Ruan, Helen Scott, Jessica Gorrill, Judith Nicholson, Jacqueline Kelly, Selvakumar Anbalagan, James Thompson, Michael Rl Stratford, Sarah J Jevons, Ester M Hammond, Cheryl L Scudamore, Martin Kerr, Anne E Kiltie
As the population ages, more elderly patients require radiotherapy-based treatment for their pelvic malignancies, including muscle-invasive bladder cancer, as they are unfit for major surgery. Therefore, there is an urgent need to find radiosensitising agents minimally toxic to normal tissues, including bowel and bladder, for such patients. We developed methods to determine normal tissue toxicity severity in intestine and bladder in vivo, using novel radiotherapy techniques on a small animal radiation research platform (SARRP)...
August 24, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28821646/location-of-the-mesopontine-neurons-responsible-for-maintanance-of-anesthetic-loss-of-consciousness
#7
Anne Minert, Shai-Lee Yatziv, Marshall Devor
The transition from wakefulness to general anesthesia is widely attributed to suppressive actions of anesthetic molecules distributed by the systemic circulation to the cerebral cortex (for amnesia and loss-of-consciousness) and to the spinal cord (for atonia and antinociception). An alternative hypothesis proposes that anesthetics act on one or more brainstem or diencephalic nuclei, with suppression of cortex and spinal cord mediated by dedicated axonal pathways. We previously documented induction of an anesthesia-like state in rats by microinjection of small amounts of GABAA-R agonists into an upper brainstem region named the mesopontine tegmental anesthesia area(MPTA)...
August 16, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28813596/molecular-imaging-of-p-glycoprotein-in-chemoresistant-tumors-using-a-dual-modality-pet-fluorescence-probe
#8
Mengzhe Wang, Chengqiong Mao, Hui Wang, Xueying Ling, Zhanhong Wu, Zibo Li, Xin Ming
Overexpression of P-glycoprotein (Pgp) has been considered a primary cause for multidrug resistance in a variety of cancers for three decades. However, clinical translation of Pgp targeted therapeutics has been hindered by lack of patient preselection based on the Pgp presence in tumors. We aim to develop a molecularly targeted probe for imaging tumoral Pgp in vivo with positron emission tomography (PET) and fluorescence, and to provide a tool for preselecting the patients with tumoral Pgp expression. Thus, a Pgp monoclonal antibody 15D3 was chemically modified with IRDye800 (IR800) and DOTA chelator...
August 30, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28808947/the-sydney-heart-bank-improving-translational-research-while-eliminating-or-reducing-the-use-of-animal-models-of-human-heart-disease
#9
REVIEW
C G Dos Remedios, S P Lal, A Li, J McNamara, A Keogh, P S Macdonald, R Cooke, E Ehler, R Knöll, S B Marston, J Stelzer, H Granzier, C Bezzina, S van Dijk, F De Man, G J M Stienen, J Odeberg, F Pontén, W Linke, J van der Velden
The Sydney Heart Bank (SHB) is one of the largest human heart tissue banks in existence. Its mission is to provide high-quality human heart tissue for research into the molecular basis of human heart failure by working collaboratively with experts in this field. We argue that, by comparing tissues from failing human hearts with age-matched non-failing healthy donor hearts, the results will be more relevant than research using animal models, particularly if their physiology is very different from humans. Tissue from heart surgery must generally be used soon after collection or it significantly deteriorates...
August 14, 2017: Biophysical Reviews
https://www.readbyqxmd.com/read/28805824/flexible-shape-memory-scaffold-for-minimally-invasive-delivery-of-functional-tissues
#10
Miles Montgomery, Samad Ahadian, Locke Davenport Huyer, Mauro Lo Rito, Robert A Civitarese, Rachel D Vanderlaan, Jun Wu, Lewis A Reis, Abdul Momen, Saeed Akbari, Aric Pahnke, Ren-Ke Li, Christopher A Caldarone, Milica Radisic
Despite great progress in engineering functional tissues for organ repair, including the heart, an invasive surgical approach is still required for their implantation. Here, we designed an elastic and microfabricated scaffold using a biodegradable polymer (poly(octamethylene maleate (anhydride) citrate)) for functional tissue delivery via injection. The scaffold's shape memory was due to the microfabricated lattice design. Scaffolds and cardiac patches (1 cm × 1 cm) were delivered through an orifice as small as 1 mm, recovering their initial shape following injection without affecting cardiomyocyte viability and function...
August 14, 2017: Nature Materials
https://www.readbyqxmd.com/read/28797552/perforating-cervical-thoracic-and-abdominal-wounds
#11
REVIEW
Marije Risselada
Most body wall injuries in small animals are caused by bite wounds or vehicular trauma. Penetrating gunshot wounds are less common. Bite wounds are characterized by massive trauma to the body wall with associated defects, but fewer internal injuries, whereas gunshot wounds are associated with a high number of internal injuries. Vehicular accident injuries are caused by blunt force trauma and can lead to both body wall defects and internal organ damage. Impalement injuries are rare and are typically associated with internal damage...
August 7, 2017: Veterinary Clinics of North America. Small Animal Practice
https://www.readbyqxmd.com/read/28797196/the-improve-guidelines-ischaemia-models-procedural-refinements-of-in-vivo-experiments
#12
Nathalie Percie du Sert, Alessio Alfieri, Stuart M Allan, Hilary Vo Carswell, Graeme A Deuchar, Tracy D Farr, Paul Flecknell, Lindsay Gallagher, Claire L Gibson, Michael J Haley, Malcolm R Macleod, Barry W McColl, Christopher McCabe, Anna Morancho, Lawrence Df Moon, Michael J O'Neill, Isabel Pérez de Puig, Anna Planas, C Ian Ragan, Anna Rosell, Lisa A Roy, Kathryn O Ryder, Alba Simats, Emily S Sena, Brad A Sutherland, Mark D Tricklebank, Rebecca C Trueman, Lucy Whitfield, Raymond Wong, I Mhairi Macrae
Most in vivo models of ischaemic stroke target the middle cerebral artery and a spectrum of stroke severities, from mild to substantial, can be achieved. This review describes opportunities to improve the in vivo modelling of ischaemic stroke and animal welfare. It provides a number of recommendations to minimise the level of severity in the most common rodent models of middle cerebral artery occlusion, while sustaining or improving the scientific outcomes. The recommendations cover basic requirements pre-surgery, selecting the most appropriate anaesthetic and analgesic regimen, as well as intraoperative and post-operative care...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28777704/noninvasive-identification-of-renal-hypoxia-in-experimental-myocardial-infarctions-of-different-sizes-by-using-bold-mr-imaging-in-a-mouse-model
#13
Di Chang, Yuan-Cheng Wang, Ting-Ting Xu, Xin-Gui Peng, Yu Cai, Lin Wang, Ying-Ying Bai, Shenghong Ju
Purpose To test the feasibility of using blood oxygen level-dependent (BOLD) magnetic resonance (MR) imaging to measure alterations in renal oxygenation in a mouse model with experimental myocardial infarctions (MIs) of different sizes. Materials and Methods The study was approved by the local animal ethics committee. One hundred eighty-nine male C57BL/6 J mice were randomly subjected to MI surgery (with different locations of left anterior descending coronary artery occlusion) or sham surgery, defined as the exposure of the heart but no ligation...
August 4, 2017: Radiology
https://www.readbyqxmd.com/read/28752425/minimal-modulation-of-the-host-immune-response-to-sis-matrix-implants-by-mesenchymal-stem-cells-from-the-amniotic-fluid
#14
F Lesage, S Pranpanus, F M Bosisio, M Jacobs, S Ospitalieri, J Toelen, J Deprest
PURPOSE: Surgical restoration of soft tissue defects often requires implantable devices. The clinical outcome of the surgery is determined by the properties inherent to the used matrix. Mesenchymal stem cells (MSC) modulate the immune processes after in vivo transplantation and their addition to matrices is associated with constructive remodeling. Herein we evaluate the potential of MSC derived from the amniotic fluid (AF-MSC), an interesting MSC source for cell therapeutic applications in the perinatal period, for immune modulation when added to a biomaterial...
July 27, 2017: Hernia: the Journal of Hernias and Abdominal Wall Surgery
https://www.readbyqxmd.com/read/28708111/an-evaluation-of-ischaemic-preconditioning-as-a-method-of-reducing-ischaemia-reperfusion-injury-in-liver-surgery-and-transplantation
#15
REVIEW
Francis P Robertson, Barry J Fuller, Brian R Davidson
Liver Ischaemia Reperfusion (IR) injury is a major cause of post-operative liver dysfunction, morbidity and mortality following liver resection surgery and transplantation. There are no proven therapies for IR injury in clinical practice and new approaches are required. Ischaemic Preconditioning (IPC) can be applied in both a direct and remote fashion and has been shown to ameliorate IR injury in small animal models. Its translation into clinical practice has been difficult, primarily by a lack of knowledge regarding the dominant protective mechanisms that it employs...
July 14, 2017: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/28688170/influence-of-orthopedic-reinforced-gloves-versus-double-standard-gloves-on-contamination-events-during-small-animal-orthopedic-surgery
#16
Galina Hayes, Ameet Singh, Tom Gibson, Noel Moens, Michelle Oblak, Adam Ogilvie, Debbie Reynolds
OBJECTIVE: To determine the influence of orthopedic reinforced gloves on contamination events during small animal orthopedic surgery. STUDY DESIGN: Prospective randomized controlled trial SAMPLE POPULATION: Two hundred and thirty-seven pairs of orthopedic gloves (474 gloves) and 203 pairs of double standard gloves (812 gloves) worn during 193 orthopedic procedures. METHODS: Primary and assistant surgeons were randomized to wear either orthopedic reinforced gloves or double gloves...
July 8, 2017: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/28683064/murine-chronic-lymph-node-window-for-longitudinal-intravital-lymph-node-imaging
#17
Eelco F J Meijer, Han-Sin Jeong, Ethel R Pereira, Thomas A Ruggieri, Cedric Blatter, Benjamin J Vakoc, Timothy P Padera
Chronic imaging windows in mice have been developed to allow intravital microscopy of many different organs and have proven to be of paramount importance in advancing our knowledge of normal and disease processes. A model system that allows long-term intravital imaging of lymph nodes would facilitate the study of cell behavior in lymph nodes during the generation of immune responses in a variety of disease settings and during the formation of metastatic lesions in cancer-bearing mice. We describe a chronic lymph node window (CLNW) surgical preparation that allows intravital imaging of the inguinal lymph node in mice...
August 2017: Nature Protocols
https://www.readbyqxmd.com/read/28664743/mapk-pathway-regulated-the-cardiomyocyte-apoptosis-in-mice-with-post-infarction-heart-failure
#18
Q Zhang, L Lu, T Liang, M Liu, Z L Wang, P Y Zhang
BACKGROUND: To explore the role of the MAPK signaling pathway in the cardiomyocyte apoptosis of mice with post-infarction heart failure (HF). METHODS: Mice were divided into sham and myocardial infarction (MI) groups. Before surgery, the MI group was divided into SB203580 and PBS subgroups. A post-infarction HF model was established by ligating the left anterior descending coronary artery. Ventricular dilatation and cardiac function were observed by small animal echocardiography...
2017: Bratislavské Lekárske Listy
https://www.readbyqxmd.com/read/28659226/description-of-a-method-for-inducing-fetal-growth-restriction-in-the-spiny-mouse
#19
H Dickinson, S Ellery, M Davies-Tuck, M Tolcos, I Nitsos, D W Walker, S L Miller
Intrauterine or fetal growth restriction (IUGR) is a major complication of pregnancy and leads to significant perinatal morbidities and mortality. Typically, induction of IUGR in animals involves the complete occlusion or ablation of vessels to the uterus or placenta, acutely impairing blood flow and fetal growth, usually with high fetal loss. We aimed to produce a model of reduced fetal growth in the spiny mouse with minimal fetal loss. At 27 days gestational age (term is 38-39 days), a piece of silastic tubing was placed around the left uterine artery to prevent the further increase of uterine blood flow with advancing gestation to induce IUGR (occluded)...
June 29, 2017: Journal of Developmental Origins of Health and Disease
https://www.readbyqxmd.com/read/28657655/the-effect-of-nail-characteristics-on-surface-bacterial-counts-of-surgical-personnel-before-and-after-scrubbing
#20
Jade M Hardy, Tina J Owen, Steven A Martinez, Lisa P Jones, Margaret A Davis
OBJECTIVE: To determine the influence of nail characteristics on bacterial counts on the fingers of surgery personnel. STUDY DESIGN: Randomized nonblinded controlled crossover study design. SAMPLE POPULATION: Veterinary students, small animal surgery technicians, small animal surgery interns/residents, and small animal surgery faculty in a veterinary teaching hospital (n = 21). METHODS: Subjects were randomized into one of 2 groups; group 1 wore nail polish (P) for 1 week and group 2 (control) had nonpolished (NP) fingernails...
June 28, 2017: Veterinary Surgery: VS
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