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https://www.readbyqxmd.com/read/28734737/ginsenoside-f2-induces-the-release-of-mediators-associated-with-anaphylactoid-reactions
#1
Lu Wang, Fan Zhang, Zhengyu Cao, Ying Xiao, Suxia Li, Boyang Yu, Jin Qi
Recently, the allergenicity of ginsenosides, as main active components in ginseng, has attracted much attention. Ginsenoside Rb1 and Rd. have been reported to induce anaphylactoid reaction. In this study, the allergenicity of a series of 20(S)-protopanaxadiol (PPD) type ginsenosides, including Rb1, Rd., F2, Compound K and 20(S)-PPD, was evaluated in rat basophilic leukemia 2H3 (RBL2H3) cells. As a result, 20(S)-PPD had no effect on the mast cell degranulation, but other components showed anaphylactoid potential to different extent...
July 19, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28730282/blockade-of-%C3%AE-2-adrenergic-receptors-in-prelimbic-cortex-impact-on-cocaine-self-administration-in-adult-spontaneously-hypertensive-rats-following-adolescent-atomoxetine-treatment
#2
Britahny M Baskin, Bríd Á Nic Dhonnchadha, Linda P Dwoskin, Kathleen M Kantak
RATIONALE: Research with the spontaneously hypertensive rat (SHR) model of attention deficit/hyperactivity disorder demonstrated that chronic methylphenidate treatment during adolescence increased cocaine self-administration established during adulthood under a progressive ratio (PR) schedule. Compared to vehicle, chronic atomoxetine treatment during adolescence failed to increase cocaine self-administration under a PR schedule in adult SHR. OBJECTIVES: We determined if enhanced noradrenergic transmission at α2-adrenergic receptors within prefrontal cortex contributes to this neutral effect of adolescent atomoxetine treatment in adult SHR...
July 20, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28729838/detection-of-emodin-derived-glutathione-adduct-in-normal-rats-administered-with-large-dosage-of-polygoni-multiflori-radix
#3
Li-Long Jiang, Dong-Sheng Zhao, Ya-Xi Fan, Qiong Yu, Ping Li, Hui-Jun Li
Polygoni Multiflori Radix (PMR) has been commonly used as a tonic in China for centuries. PMR-associated hepatotoxicity has been drawing increasingly more attention in recent years in parallel with its wide utilization. Anthraquinones (AQs) are recognized as the main hepatotoxic components in PMR. However, the exact underlying mechanism of AQs poisoning is still not fully understood. Herein, we proposed a hypothesis that metabolic activation of AQs such as emodin was involved in PMR-induced liver injury, AQs followed to generate the electrophilic reactive metabolites and subsequently formed covalent adduct with cellular nucleophiles in the liver to exert hepatotoxicity...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28726665/-about-the-role-of-digestive-tract-decompression-in-patients-with-acute-bowel-obstruction-mistakes-complications-and-their-prevention
#4
V Benedykt
The purpose of the work is improvement in treatment of patients with acute small bowel obstruction by justification for gastrointestinal decompression and different methods of small intestine intubation for effective evacuation of itscontents. We conducted morphological and morphometric study of the small intestine in 53 white rats. It was established that acute small bowel obstruction causes expansion of all parts of small bowel microvasculature with significant lesions of venous structures. We revealed thinning of intestinal muscular layer 2...
June 2017: Georgian Medical News
https://www.readbyqxmd.com/read/28721756/lycopene-ameliorates-experimental-colitis-in-rats-via-reducing-apoptosis-and-oxidative-stress
#5
Burcu Gul Baykalir, Dilek Aksit, Mustafa Selim Dogru, Arzu Hanım Yay, Hasan Aksit, Kamil Seyrek, Ahmet Attesahin
Inflammatory bowel disease (IBD) is an inflammatory disorder involving colitis. Lycopene is a naturally occurring carotenoid that has attracted considerable attention as a potential chemopreventive agent. The impact of lycopene on colitis is currently unknown. The aim of this study was to investigate the protective effects of lycopene in a rat model of colitis induced by acetic acid. The animals were randomly divided into the following five groups: the control group, colitis group, colitis + sulfasalazine group as a positive control group, colitis + lycopene and lycopene groups...
July 19, 2017: International Journal for Vitamin and Nutrition Research. Journal International de Vitaminologie et de Nutrition
https://www.readbyqxmd.com/read/28720846/physiological-stress-induced-corticosterone-increases-heme-uptake-via-klf4-hcp1-signaling-pathway-in-hippocampus-neurons
#6
Hongxia Li, Caixia Zhang, Hui Shen, Zhilei Shen, Lusha Wu, Fengfeng Mo, Min Li
Iron overload has attracted much attention because of its adverse effect in increasing the risk of developing several neurodegenerative disorders. Under various pathologic conditions, a lot of heme are released. The aggregation of heme is more neurotoxic than that of iron released from the heme breakdown. Our previous studies demonstrated that psychological stress (PS) is a risk factor of cerebral iron metabolism disorders, thus causing iron accumulation in rat brains. In the present study, we found PS could increase heme uptake via heme carrier protein 1 (HCP1) in rat brains...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28720249/using-wheel-availability-to-shape-running-behavior-of-the-rat-towards-improved-behavioral-and-neurobiological-outcomes
#7
Julia C Basso, Joan I Morrell
BACKGROUND: Though voluntary wheel running (VWR) has been used extensively to induce changes in both behavior and biology, little attention has been given to the way in which different variables influence VWR. This lack of understanding has led to an inability to utilize this behavior to its full potential, possibly blunting its effects on the endpoints of interest. NEW METHOD: We tested how running experience, sex, gonadal hormones, and wheel apparatus influence VWR in a range of wheel access "doses"...
July 15, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28715803/antinociceptive-effects-of-isosakuranetin-in-a-rat-model-of-peripheral-neuropathy
#8
Shushan Jia, Yong Zhang, Jingui Yu
Chronic pain remains a challenging clinical reality, yet currently available analgesics are insufficient to meet clinical needs. Increasing attention has been paid to bioactive compounds from natural plants, which may be efficacious against pain. This study examined the antinociceptive effects of isosakuranetin, a plant-derived transient receptor potential melastatin 3 blocker, in a rat model of peripheral neuropathy. Adult male Sprague-Dawley rats were first allowed to go through the chronic constriction injury surgery to develop neuropathic pain...
July 18, 2017: Pharmacology
https://www.readbyqxmd.com/read/28713296/affective-and-engagement-issues-in-the-conception-and-assessment-of-a-robot-assisted-psychomotor-therapy-for-persons-with-dementia
#9
Natacha Rouaix, Laure Retru-Chavastel, Anne-Sophie Rigaud, Clotilde Monnet, Hermine Lenoir, Maribel Pino
The interest in robot-assisted therapies (RAT) for dementia care has grown steadily in recent years. However, RAT using humanoid robots is still a novel practice for which the adhesion mechanisms, indications and benefits remain unclear. Also, little is known about how the robot's behavioral and affective style might promote engagement of persons with dementia (PwD) in RAT. The present study sought to investigate the use of a humanoid robot in a psychomotor therapy for PwD. We examined the robot's potential to engage participants in the intervention and its effect on their emotional state...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28712042/erratum-to-effects-of-atomoxetine-on-attention-in-wistar-rats-treated-with-the-neurotoxin-n-2-chloroethyl-n-ethyl-2-bromobenzylamine-dsp4
#10
Joachim Hauser, Andreas Reissmann, Thomas-A Sontag, Oliver Tucha, Klaus W Lange
No abstract text is available yet for this article.
July 15, 2017: Attention Deficit and Hyperactivity Disorders
https://www.readbyqxmd.com/read/28711625/suppressing-mpges-1-expression-by-sinomenine-ameliorates-inflammation-and-arthritis
#11
Hua Zhou, Jian-Xin Liu, Jin-Fang Luo, Chun-Song Cheng, Elaine Lai-Han Leung, Ying Li, Xiao-Hui Su, Zhong-Qiu Liu, Ting-Bo Chen, Fu-Gang Duan, Yan Dong, Yi-Han Zuo, Chong Li, Chon Kit Lio, Ting Li, Pei Luo, Ying Xie, Xiao-Jun Yao, Pei-Xun Wang, Liang Liu
Recently, microsomal prostaglandin E synthase 1 (mPGES-1) has attracted much attention from pharmacologists as a promising strategy and an attractive target for treating various types of diseases including rheumatoid arthritis (RA), which could preserve the anti-inflammatory effect while reducing the adverse effects often occur during administration of Non-steroidal anti-inflammatory drugs (NSAIDs). Here, we report that Sinomenine (SIN) decreased prostaglandin (PG)E2 levels without affecting prostacyclin (PG)I2 and thromboxane (TX)A2 synthesis via selective inhibiting mPGES-1 expression, a possible reason of low risk of cardiovascular event compared with NSAIDs...
July 12, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28711285/anti-il-21-monoclonal-antibody-combined-with-liraglutide-effectively-reverses-established-hyperglycemia-in-mouse-models-of-type-1-diabetes
#12
Anna K Rydén, Nikole R Perdue, Philippe P Pagni, Claire B Gibson, Sowbarnika S Ratliff, Rikke K Kirk, Travis J Friesen, Claus Haase, Ken Coppieters, Matthias G von Herrath, Tamar E Boursalian
Immunotherapy for type 1 diabetes (T1D) has previously focused on suppressing the autoimmune response against pancreatic beta cells to preserve endogenous insulin production and regulate glucose levels. With increased attention toward combination therapy strategies, studies indicate the multifunctional cytokine interleukin-21 (IL-21) may be a suitable target as an immuno-modulatory arm, while glucagon-like peptide-1 receptor (GLP-1R) agonists may be appropriate as a beta cell protective arm in combination therapy for T1D...
July 12, 2017: Journal of Autoimmunity
https://www.readbyqxmd.com/read/28710519/validation-of-the-human-odor-span-task-effects-of-nicotine
#13
David A MacQueen, David J Drobes
RATIONALE: Amongst non-smokers, nicotine generally enhances performance on tasks of attention, with limited effect on working memory. In contrast, nicotine has been shown to produce robust enhancements of working memory in non-humans. OBJECTIVES: To address this gap, the present study investigated the effects of nicotine on the performance of non-smokers on a cognitive battery which included a working memory task reverse-translated from use with rodents (the odor span task, OST)...
July 14, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28705471/risk-assessment-and-serotonin-animal-models-and-human-psychopathologies
#14
REVIEW
D Caroline Blanchard, Ksenia Meyza
Risk assessment (RA) is an evolved, generally adaptive, mechanism comprising focused attention and appraisal of potential threat stimuli and situations. Initially characterized in animal models, it provides a number of behavioral and functional parallels to patterns of rumination, gaze biases, and other forms of affective cognition that appear to be disregulated in depression and anxiety. Serotonergic mechanisms are involved in these mood disorders, and an emerging body of evidence suggests that they may modulate the affective cognitive changes common to such psychopathologies...
July 10, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28704723/highly-sensitive-determination-of-fatty-acid-esters-of-hydroxyl-fatty-acids-by-liquid-chromatography-mass-spectrometry
#15
Quan-Fei Zhu, Jing-Wen Yan, Yang Gao, Jing-Wei Zhang, Bi-Feng Yuan, Yu-Qi Feng
Recently, a new class of endogenous lipids, branched fatty acid esters of hydroxy fatty acids (FAHFAs), was discovered with anti-diabetic and anti-inflammatory effects in mammals. FAHFAs attracted increasing attention because of their critical physiological function. However, accurate quantitation of FAHFAs is still a challenge due to their high structure similarity and low abundance in biological samples. Herein, we developed a highly sensitive method for the determination of 16 FAHFAs (PAHSAs, OAHSAs, SAHSAs and POHSAs) in biological samples by coupling strong anion exchange solid phase extraction (SAX-SPE) with chemical labeling assisted ultra-high performance liquid chromatography/mass spectrometry (SAX-SPE-CL-UHPLC/MS)...
June 27, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28700674/effects-of-taurine-on-resting-state-fmri-activity-in-spontaneously-hypertensive-rats
#16
Vincent Chin-Hung Chen, Tsai-Ching Hsu, Li-Jeng Chen, Hong-Chun Chou, Jun-Cheng Weng, Bor-Show Tzang
Attention deficit hyperactivity disorder (ADHD) is a global behavior illness among children and adults. To investigate the effects of taurine on resting-state fMRI activity in ADHD, a spontaneously hypertensive rat (SHR) animal model was adopted. Significantly decreased serum C-reactive protein (CRP) was detected in rats of Wistar Kyoto (WKY) high-taurine group and significantly decreased interleukin (IL)-1β and CRP were detected in rats of SHR low-taurine and high-taurine groups. Moreover, significantly higher horizontal locomotion was detected in rats of WKY low-taurine and SHR low-taurine groups than in those of controls...
2017: PloS One
https://www.readbyqxmd.com/read/28698187/the-stoichiometry-%C3%AE-4-3-%C3%AE-2-2-of-the-nicotinic-acetylcholine-receptor-predominates-in-the-rat-motor-cortex
#17
Kristen E DeDominicis, Niaz Sahibzada, Thao T Olson, Yingxian Xiao, Barry B Wolfe, Kenneth J Kellar, Robert P Yasuda
The α4β2 nicotinic acetylcholine receptor (nAChR) is important in normal CNS physiology and in mediating several of the pharmacological effects of nicotine on cognition, attention, and affective states. It is also the likely receptor that mediates nicotine addiction. This receptor assembles in two distinct stoichiometries: (α4)2(β2)3 and (α4)3(β2)2 that are referred to as high (HS) and low (LS) sensitivity nAChRs, respectively, based on a difference in the potency of acetylcholine to activate them. The physiological and pharmacological differences between these two receptor subtypes have been described in heterologous expression systems...
July 11, 2017: Molecular Pharmacology
https://www.readbyqxmd.com/read/28698112/slow-aging-in-mammals-lessons-from-african-mole-rats-and-bats
#18
REVIEW
Philip Dammann
Traditionally, the main mammalian models used in aging research have been mice and rats, i.e. short-lived species that obviously lack effective maintenance mechanisms to keep their soma in a functional state for prolonged periods of time. It is doubtful that life-extending mechanisms identified only in such short-lived species adequately reflect the diversity of longevity pathways that have naturally evolved in mammals, or that they have much relevance for long-lived species such as humans. Therefore, some complementary, long-lived mammalian models have been introduced to aging research in the past 15-20 years, particularly naked mole-rats (and to a lesser extent also other mole-rats) and bats...
July 8, 2017: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/28694175/daily-consumption-of-methylene-blue-reduces-attentional-deficits-and-dopamine-reduction-in-a-6-ohda-model-of-parkinson-s-disease
#19
Elizabeth S Smith, Madeline E Clark, Gwendolyn A Hardy, David J Kraan, Elisa Biondo, F Gonzalez-Lima, Lawrence K Cormack, Marie Monfils, Hongjoo J Lee
Recently, alternative drug therapies for Parkinson's disease (PD) have been investigated as there are many shortcomings of traditional dopamine-based therapies including difficulties in treating cognitive and attentional dysfunction. A promising therapeutic avenue is to target mitochondrial dysfunction and oxidative stress in PD. One option might be the use of methylene blue (MB), an antioxidant and metabolic enhancer. MB has been shown to improve cognitive function in both intact rodents and rodent disease models...
July 8, 2017: Neuroscience
https://www.readbyqxmd.com/read/28692063/inflammation-dependent-cerebrospinal-fluid-hypersecretion-by-the-choroid-plexus-epithelium-in-posthemorrhagic-hydrocephalus
#20
Jason K Karimy, Jinwei Zhang, David B Kurland, Brianna Carusillo Theriault, Daniel Duran, Jesse A Stokum, Charuta Gavankar Furey, Xu Zhou, M Shahid Mansuri, Julio Montejo, Alberto Vera, Michael L DiLuna, Eric Delpire, Seth L Alper, Murat Gunel, Volodymyr Gerzanich, Ruslan Medzhitov, J Marc Simard, Kristopher T Kahle
The choroid plexus epithelium (CPE) secretes higher volumes of fluid (cerebrospinal fluid, CSF) than any other epithelium and simultaneously functions as the blood-CSF barrier to gate immune cell entry into the central nervous system. Posthemorrhagic hydrocephalus (PHH), an expansion of the cerebral ventricles due to CSF accumulation following intraventricular hemorrhage (IVH), is a common disease usually treated by suboptimal CSF shunting techniques. PHH is classically attributed to primary impairments in CSF reabsorption, but little experimental evidence supports this concept...
July 10, 2017: Nature Medicine
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