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https://www.readbyqxmd.com/read/28550800/2-phthalimidethanol-and-2-phthalimidethyl-nitrate-inhibit-mechanical-allodynia-neutrophil-recruitment-and-cytokine-and-chemokine-production-in-a-murine-model-of-articular-inflammation
#1
Adriana M Godin, Débora P Araújo, Raquel R Menezes, Ana M S de Brito, Ivo S F Melo, Giovanna M E Coura, Leandro F S Bastos, Flávio A Amaral, Mauro M Teixeira, Ângelo de Fátima, Márcio M Coelho, Renes R Machado
BACKGROUND: Phthalimide analogs have been shown to exhibit anti-inflammatory, analgesic and immunomodulatory activities in different preclinical assays. This study aimed to investigate the potential role of 2-phthalimidethanol (PTD-OH) and 2-phthalimidethyl nitrate (PTD-NO) in a murine model of antigen-induced articular inflammation. METHODS: Articular inflammation was induced by intra-articular injection of methylated bovine serum albumin (mBSA) in the knee joint of immunized male C57BL/6J mice...
February 8, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/28550792/social-stress-contagion-in-rats-behavioural-autonomic-and-neuroendocrine-correlates
#2
Luca Carnevali, Nicola Montano, Rosario Statello, Gino Coudé, Federica Vacondio, Silvia Rivara, Pier Francesco Ferrari, Andrea Sgoifo
The negative emotional consequences associated with life stress exposure in an individual can affect the emotional state of social partners. In this study, we describe an experimental rat model of social stress contagion and its effects on social behaviour and cardiac autonomic and neuroendocrine functions. Adult male Wistar rats were pair-housed and one animal (designated as "demonstrator" (DEM)) was submitted to either social defeat stress (STR) by an aggressive male Wild-type rat in a separate room or just exposed to an unfamiliar empty cage (control condition, CTR), once a day for 4 consecutive days...
May 20, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28550790/trophic-fate-of-inorganic-and-methyl-mercury-in-a-macrophyte-chironomid-food-chain
#3
Rebecca Beauvais-Flück, Frédéric Gimbert, Ophélie Méhault, Claudia Cosio
Dietary transfer of mercury (Hg) is central for its effects on higher trophic animals, nonetheless, its driving parameters and characteristics are not well understood. Here we measured Hg species transfer (uptake) from the macrophyte Elodea nuttallii -mimicking tissues incorporation in sediments after decay- to Chironomus riparius. Methyl-Hg (MMHg) was more transferable than inorganic Hg (IHg) from plant's intracellular and cell wall compartments. After 10-d-long exposure, MMHg was predominantly found in MMHg form in the cytosolic compartment (S) of chironomids, while IHg showed similar concentrations in S and insoluble debris (P) compartments...
May 17, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28550758/platelets-and-hemophilia-a-review-of-the-literature
#4
REVIEW
Julia Riedl, Cihan Ay, Ingrid Pabinger
Hemophilia A and B are inherited bleeding disorders due to deficiencies of the clotting factors VIII and IX, respectively. The severity of the disease correlates with remaining factor levels, although individual differences in bleeding tendency are seen despite similar factor levels. While thrombin generation is severely impaired in persons with hemophilia, primary hemostasis, i.e. platelet function, has been generally considered to be normal. However, some studies reported prolonged bleeding times in hemophilia, suggesting that also primary hemostasis is affected...
May 13, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28550637/breaking-bad-the-structure-and-function-of-the-blood-brain-barrier-in-epilepsy
#5
Hadas Han, Aniv Mann, Dana Ekstein, Sara Eyal
Epilepsy is a neurological disease with variable etiology and clinical manifestation, affecting more than 50 million people worldwide. Although the ultimate precipitators of seizures are neurons, it is becoming evident that epileptic activity is associated with changes in the function of other cell types, including those consisting the blood-brain barrier (BBB) and regulating its permeability. The interrelationships between impaired BBB function and epilepsy are complex, as BBB dysfunction may both lead to seizures and be induced by epileptic activity...
May 26, 2017: AAPS Journal
https://www.readbyqxmd.com/read/28550447/trends-in-surgical-research-in-head-and-neck-cancer
#6
REVIEW
Genrich Tolstonog, Christian Simon
The task of surgical research is to improve the efficacy of available surgical therapeutic modalities, develop new ones, and balance this well with favorable functional outcome. Therefore, surgical research is composed of a translational and a clinical component. In translational surgical research, animal models are used to better understand the biology of head and neck cancers, but even more importantly, the biology of changes to the disease and the microenvironment created by surgical interventions. Animal models additionally allow for the development of image-guided surgery systems, novel strategies of intraoperative adjuvant treatment, and patient "avatars" to test innovative anticancer drug combinations...
June 2017: Current Treatment Options in Oncology
https://www.readbyqxmd.com/read/28550437/hyperoxaluria-in-a-model-of-mini-gastric-bypass-surgery-in-rats
#7
Milene S Ormanji, Fernando Korkes, Renata Meca, Crysthiane S R A Ishiy, Gustavo H C Finotti, Renato R N Ferraz, Ita P Heilberg
BACKGROUND: Bariatric surgery is associated with hyperoxaluria hence predisposing to nephrolithiasis. The present study aimed to investigate the underlying mechanisms contributing to increased urinary oxalate in a mini-gastric bypass (MGB) surgery model in rats under different dietary conditions. The expression of intestinal oxalate transporters was also evaluated. METHODS: Male rats underwent MGB (n = 21) or Sham procedure (n = 21) and after recovery were fed a standard or high-fat diet with or without oxalate for 8 weeks...
May 26, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28550360/bioprinting-technologies-for-disease-modeling
#8
REVIEW
Adnan Memic, Ali Navaei, Bahram Mirani, Julio Alvin Vacacela Cordova, Musab Aldhahri, Alireza Dolatshahi-Pirouz, Mohsen Akbari, Mehdi Nikkhah
There is a great need for the development of biomimetic human tissue models that allow elucidation of the pathophysiological conditions involved in disease initiation and progression. Conventional two-dimensional (2D) in vitro assays and animal models have been unable to fully recapitulate the critical characteristics of human physiology. Alternatively, three-dimensional (3D) tissue models are often developed in a low-throughput manner and lack crucial native-like architecture. The recent emergence of bioprinting technologies has enabled creating 3D tissue models that address the critical challenges of conventional in vitro assays through the development of custom bioinks and patient derived cells coupled with well-defined arrangements of biomaterials...
May 26, 2017: Biotechnology Letters
https://www.readbyqxmd.com/read/28550271/the-pleiotropic-vasoprotective-functions-of-high-density-lipoproteins-hdl
#9
Boyce Guilaine, Button Emily, Soo Sonja, Wellington Cheryl
The pleiotropic functions of circulating high density lipoprotein (HDL) on peripheral vascular health are well established. HDL plays a pivotal role in reverse cholesterol transport and is also known to suppress inflammation, endothelial activation and apoptosis in peripheral vessels. Although not expressed in the central nervous system, HDL has nevertheless emerged as a potential resilience factor for dementia in multiple epidemiological studies. Animal model data specifically support a role for HDL in attenuating the accumulation of β-amyloid within cerebral vessels concomitant with reduced neuroinflammation and improved cognitive performance...
May 26, 2017: Journal of Biomedical Research
https://www.readbyqxmd.com/read/28550174/variability-in-coronary-artery-anatomy-affects-consistency-of-cardiac-damage-following-myocardial-infarction-in-mice
#10
Jiqiu Chen, Delaine K Ceholski, Lifan Liang, Kenneth Fish, Roger J Hajjar
Low reliability and reproducibility in heart failure models are well established. The purpose of the present study is to explore factors that affect model consistency of myocardial infarction (MI) in mice. METHODS: MI was induced by left coronary artery (LCA) ligation. The coronary artery was casted with resin and visualized with fluorescent imaging ex vivo. LCA characteristics and MI size were analyzed individually in each animal, and MI size was correlated with left ventricular (LV) function by echocardiography...
May 26, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28550169/the-gliotransmitter-d-serine-promotes-synapse-maturation-and-axonal-stabilization-in-vivo
#11
Marion R Van Horn, Arielle Strasser, Lois S Miraucourt, Loredano Pollegioni, Edward S Ruthazer
The N-methyl-D-aspartate receptor (NMDAR) is thought to play a key role in the refinement of connectivity in developing neural circuits. Pharmacological blockade or genetic loss-of-function manipulations that prevent NMDAR function during development result in the disorganization of topographic axonal projections. However, because NMDARs contribute to overall glutamatergic neurotransmission, such loss-of-function experiments fail to adequately distinguish between the roles played by NMDARs and neural activity in general...
May 26, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28550101/a-novel-experimental-rat-model-of-peripheral-nerve-scarring-reliably-mimicking-post-surgical-complications-and-recurring-adhesions
#12
Angela Lemke, Carina Penzenstadler, James Ferguson, Dominika Lidinsky, Rudolf Hopf, Monika Bradl, Heinz Redl, Susanne Wolbank, Thomas Hausner
Inflammation, fibrosis and perineural adhesions with the surrounding tissue are common pathological processes following nerve injury and surgical interventions on peripheral nerves in human patients. Furthermore, these signs can reoccur following external neurolysis, currently the most common surgical treatment, thus leading to renewed nerve function impairment and chronic pain. To enable a successful evaluation of new therapeutic approaches, it is crucial to use a reproducible animal model that mimics the main clinical symptoms occurring in human patients...
May 26, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28550100/an-alternative-surgical-approach-reduces-variability-following-filament-induction-of-experimental-stroke-in-mice
#13
M Trotman-Lucas, M E Kelly, J Janus, R Fern, C L Gibson
Animal models are critical for understanding the pathology of stroke and investigating potential treatments. However, in vivo stroke models are associated, particularly in mice, with high variability in lesion volume. We investigated whether a surgical refinement where reperfusion is not reliant on the Circle of Willis reduced outcome variability. Mice underwent 60 minutes of transient middle cerebral artery occlusion avoiding ligation of the external carotid artery. During reperfusion the common carotid artery was either ligated (standard approach), or it was repaired to allow re-establishment of blood flow through the common carotid artery...
May 26, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28550088/cardiac-telomere-length-in-heart-development-function-and-disease
#14
Scott A Booth, Fadi J Charchar
Telomeres are repetitive nucleoprotein structures at chromosome ends and a decrease in the number of these repeats, known as a reduction in telomere length (TL), triggers cellular senescence and apoptosis. Heart disease, the worldwide leading cause of death, often results from the loss of cardiac cells which could be explained by decreases in TL. Due to the cell-specific regulation of TL, this review focuses on studies that have measured telomeres in heart cells and critically assesses the relationship between cardiac TL and heart function...
May 26, 2017: Physiological Genomics
https://www.readbyqxmd.com/read/28550087/transcriptional-networks-in-rodent-models-support-a-role-for-gut-brain-communication-in-neurogenic-hypertension-a-review-of-the-evidence
#15
Jasenka Zubcevic, Ashley Baker, Christopher J Martyniuk
Hypertension (HTN) is the most prevalent condition observed in primary health care. Hypertension shows complex etiology, and neuroinflammation, overactive sympathetic drive, and the microbiome are associated with the disease. To obtain mechanistic perspective into neurogenic HTN, we first constructed a framework for transcriptional regulators of the disease using the Comparative Toxicogenomics Database. This approach yielded a core group of 178 transcripts that are prevalent in HTN, including leptin and neuropeptide Y...
May 26, 2017: Physiological Genomics
https://www.readbyqxmd.com/read/28550016/genomic-analysis-of-genotype-by-social-environment-interaction-for-drosophila-aggressive-behavior
#16
Palle Duun Rohde, Bryn Gaertner, Kirsty Wards, Peter Sørensen, Trudy F C Mackay
Human psychiatric disorders such as schizophrenia, bipolar disorder and attention-deficit/hyper-activity disorder often include adverse behaviors including increased aggressiveness. Individuals with psychiatric disorders often exhibit social withdrawal, which can further increase the probability of conducting a violent act. Here, we used the inbred, sequenced lines of the Drosophila Genetic Reference Panel (DGRP) to investigate the genetic basis of variation in male aggressive behavior for flies reared in a socialized and socially isolated environment...
May 26, 2017: Genetics
https://www.readbyqxmd.com/read/28549992/thyroid-hormone-treatment-activates-protective-pathways-in-both-in-vivo-and-in-vitro-models-of-neuronal-injury
#17
Jianrong Li, Ines Donangelo, Kiyomi Abe, Oscar Scremin, Sujie Ke, Feng Li, Anna Milanesi, Yan-Yun Liu, Gregory A Brent
Thyroid hormone plays an important role in brain development and adult brain function, and may influence neuronal recovery after Traumatic Brain Injury (TBI). We utilized both animal and cell culture models to determine the effects of thyroid hormone treatment, post TBI or during hypoxia, on genes important for neuronal survival and neurogenesis. We show that TBI in rats is associated with a reduction in serum thyroxine (T4) and triiodothyronine (T3). A single dose of levothyroxine (T4), one hour after injury, increased serum T4 and normalized serum T3 levels...
May 23, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28549893/anesthetic-neurotoxicity-in-congenital-hand-surgery-an-overview-of-the-evidence-and-advice-for-counseling-parents
#18
REVIEW
Michael S Gart, Santhanam Suresh, Joshua M Adkinson
Millions of children undergo general anesthesia for surgical procedures each year, the implications of which are not fully understood. Animal models demonstrate neurotoxicity and long-term cognitive impairment following exposure to common general anesthetic agents. However, it is unclear if human brains are affected in a similar fashion and what-if any-the implications on cognitive development may be. Furthermore, it is not known if these effects are additive and if they can be avoided by delaying reconstruction...
May 24, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28549887/fluvoxamine-maleate-effects-on-dopamine-signaling-in-the-prefrontal-cortex-of-stressed-parkinsonian-rats-implications-for-learning-and-memory
#19
Ernest Dallé, Willie M U Daniels, Musa V Mabandla
Parkinson's disease (PD) is also associated with cognitive impairment and reduced extrinsic supply of dopamine (DA) to the prefrontal cortex (PFC). In the present study, we looked at whether exposure to early life stress reduces DA and serotonin (5-HT) concentration in the PFC thus leading to enhanced cognitive impairment in a Parkinsonian rat model. Maternal separation was the stressor used to develop an animal model for early life stress that has chronic effects on brain and behavior. Sprague-Dawley rats were treated with the antidepressant Fluvoxamine maleate (FM) prior to a unilateral 6-hydroxydopamine (6-OHDA) lesion to model motor deficits in rats...
May 23, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28549830/high-virulence-of-methicillin-resistant-staphylococcus-aureus-st30-sccmecivc-spat019-the-dominant-community-associated-clone-in-argentina
#20
Silvina Fernandez, Camila Ledo, Santiago Lattar, Mariángeles Noto Llana, Andrea Mendoza Bertelli, Sabrina Di Gregorio, Daniel O Sordelli, Marisa I Gómez, Marta E Mollerach
Community-acquired methicillin resistant Staphylococcus aureus emerged as a worldwide health problem in the last few years. In Argentina, it is found in 70% of skin and skin structure infections in previously healthy adult patients and causes severe invasive diseases. The ST30-SCCmecIVc-spat019 clone is predominant in adult infections and has displaced the previously prevalent ST5-SCCmecIVa-spat311 clone in community settings. In the present work we compared the virulence of both clones in order to explain the displacement, and found that ST30-IVc is associated with invasive infections in adult patients from Argentina and possesses a different virulence-associated genes profile compared to ST5-IVa...
May 15, 2017: International Journal of Medical Microbiology: IJMM
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