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https://www.readbyqxmd.com/read/29335483/pilot-study-to-assess-visualization-and-therapy-of-inflammatory-mechanisms-after-vessel-reopening-in-a-mouse-stroke-model
#1
Ebba Beller, Laura Reuter, Anne Kluge, Christine Preibisch, Ute Lindauer, Alexei Bogdanov, Friederike Lämmer, Claire Delbridge, Kaspar Matiasek, Benedikt J Schwaiger, Tobias Boeckh-Behrens, Claus Zimmer, Alexandra S Gersing
After reperfusion therapy in stroke patients secondary inflammatory processes may increase cerebral damage. In this pilot study, effects of anti-inflammatory therapy were assessed in a middle cerebral artery occlusion (MCAO) mouse model after reperfusion. 1 hour after MCAO, the artery was reopened and tacrolimus or NaCl were administered intra-arterially. Perfusion-weighted (PWI) and diffusion-weighted images (DWI) were obtained by MRI during MCAO. DWI, T2- and T1-weighted images with and without Bis-5HT-DTPA administration were obtained 24 hours after MCAO...
January 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29316656/azemiopsin-a-selective-peptide-antagonist-of-muscle-nicotinic-acetylcholine-receptor-preclinical-evaluation-as-a-local-muscle-relaxant
#2
Irina V Shelukhina, Maxim N Zhmak, Alexander V Lobanov, Igor A Ivanov, Alexandra I Garifulina, Irina N Kravchenko, Ekaterina A Rasskazova, Margarita A Salmova, Elena A Tukhovskaya, Vladimir A Rykov, Gulsara A Slashcheva, Natalya S Egorova, Inessa S Muzyka, Victor I Tsetlin, Yuri N Utkin
Azemiopsin (Az), a linear peptide from the Azemiops feae viper venom, contains no disulfide bonds, is a high-affinity and selective inhibitor of nicotinic acetylcholine receptor (nAChR) of muscle type and may be considered as potentially applicable nondepolarizing muscle relaxant. In this study, we investigated its preclinical profile in regard to in vitro and in vivo efficacy, acute and chronic toxicity, pharmacokinetics, allergenic capacity, immunotoxicity and mutagenic potency. The peptide effectively inhibited (IC50 ~ 19 nM) calcium response of muscle nAChR evoked by 30 μM (EC100) acetylcholine but was less potent (IC50 ~ 3 μM) at α7 nAChR activated by 10 μM (EC50) acetylcholine and had a low affinity to α4β2 and α3-containing nAChR, as well as to GABAA or 5HT₃ receptors...
January 7, 2018: Toxins
https://www.readbyqxmd.com/read/29291430/the-potential-benefit-of-combined-versus-monotherapy-of-coenzyme-q10-and-fluoxetine-on-depressive-like-behaviors-and-intermediates-coupled-to-gsk-3%C3%AE-in-rats
#3
Sally A Abuelezz, Nevien Hendawy, Yosra Magdy
As a part of the serotoninergic dysfunction implicated in neurobiology of depression, evidence has focused on serotonin (5-HT) receptors downstream signaling intermediates including glycogen synthase kinase-3β (GSK-3β), cAMP response element binding protein (CREB) and brain derived neurotrophic factor (BDNF). Our team previously reported that coenzyme Q10 (CoQ10) exerted antidepressant-like effect in rats exposed to chronic unpredictable mid stress (CUMS) via elevating serotonin levels. However, the effect of CoQ10 has not been elucidated in downstream signaling molecules mediating 5HT receptors' effect involved in depressive disorder hitherto...
December 29, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/29291394/serotonin-receptor-2b-signaling-with-interstitial-cell-activation-and-leaflet-remodeling-in-degenerative-mitral-regurgitation
#4
Kathryn H Driesbaugh, Emanuela Branchetti, Juan B Grau, Samuel J Keeney, Kimberly Glass, Mark A Oyama, Nancy Rioux, Salma Ayoub, Michael S Sacks, John Quackenbush, Robert J Levy, Giovanni Ferrari
AIMS: Mitral valve interstitial cells (MVIC) play an important role in the pathogenesis of degenerative mitral regurgitation (MR) due to mitral valve prolapse (MVP). Numerous clinical studies have observed serotonin (5HT) dysregulation in cardiac valvulopathies; however, the impact of 5HT-mediated signaling on MVIC activation and leaflet remodeling in MVP have been investigated to a limited extent. Here we test the hypothesis that 5HT receptors (5HTRs) signaling contributes to MVP pathophysiology...
December 29, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29230167/changes-in-the-cholinergic-catecholaminergic-orexinergic-and-serotonergic-structures-forming-part-of-the-sleep-systems-of-adult-mice-exposed-to-intrauterine-alcohol
#5
Oladiran I Olateju, Adhil Bhagwandin, Amadi O Ihunwo, Paul R Manger
We examined the effect of chronic prenatal alcohol exposure on certain neuronal systems involved with the sleep-wake cycle of C57BL/6J mice exposed to prenatal alcohol once they had reached 56 days post-natal. Pregnant mice were exposed to alcohol, through oral gavage, on gestational days 7-16, with recorded blood alcohol concentration (BAC)s averaging 1.84 mg/ml (chronic alcohol group, CA). Two control groups, an oral gavage sucrose control group (chronic alcohol control group, CAc) and a non-treated control group (NTc), were also examined...
2017: Frontiers in Neuroanatomy
https://www.readbyqxmd.com/read/29206101/serotonin-enhances-excitability-and-gamma-frequency-temporal-integration-in-mouse-prefrontal-fast-spiking-interneurons
#6
Jegath C Athilingam, Roy Ben-Shalom, Caroline M Keeshen, Vikaas Sohal, Kevin Bender
The medial prefrontal cortex plays a key role in higher order cognitive functions like decision making and social cognition. These complex behaviors emerge from the coordinated firing of prefrontal neurons. Fast-spiking interneurons (FSIs) control the timing of excitatory neuron firing via somatic inhibition and generate gamma (30-100 Hz) oscillations. Therefore, factors that regulate how FSIs respond to gamma-frequency input could affect both prefrontal circuit activity and behavior. Here, we show that serotonin (5HT), which is known to regulate gamma power, acts via 5HT2A receptors to suppress an inward-rectifying potassium conductance in FSIs...
December 5, 2017: ELife
https://www.readbyqxmd.com/read/29174588/trimethylene-carbonate-caprolactone-conduit-with-poly-p-dioxanone-microfilaments-to-promote-regeneration-after-spinal-cord-injury
#7
Liudmila N Novikova, Mallappa K Kolar, Paul J Kingham, Andreas Ullrich, Sven Oberhoffner, Monika Renardy, Michael Doser, Erhard Müller, Mikael Wiberg, Lev N Novikov
Spinal cord injury (SCI) is often associated with scarring and cavity formation and therefore bridging strategies are essential to provide a physical substrate for axonal regeneration. In this study we investigated the effects of a biodegradable conduit made from trimethylene carbonate and ε-caprolactone (TC) containing poly-p-dioxanone microfilaments (PDO) with longitudinal grooves on regeneration after SCI in adult rats. In vitro studies demonstrated that different cell types including astrocytes, meningeal fibroblasts, Schwann cells and adult sensory dorsal root ganglia neurons can grow on the TC and PDO material...
November 22, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/29159869/acute-intermittent-hypoxia-with-concurrent-hypercapnia-evokes-p2x-and-trpv1-receptor-dependent-sensory-long-term-facilitation-in-na%C3%A3-ve-carotid-bodies
#8
Arijit Roy, Melissa M J Farnham, Fatemeh Derakhshan, Paul M Pilowsky, Richard J A Wilson
Apneas constitute an acute existential threat to neonates and adults. In large part, this threat is detected by the carotid bodies, the primary peripheral chemoreceptors, and combatted by arousal and acute cardiorespiratory responses, including increased sympathetic output. Similar responses occur with repeated apneas but they continue beyond the last apnea and can persist for hours (i.e. ventilatory and sympathetic LTF). These long-term effects may be adaptive during acute episodic apnea, but may prolong hypertension causing chronic cardiovascular impairment...
November 21, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/29157077/how-does-early-maternal-separation-and-chronic-stress-in-adult-rats-affect-the-immunoreactivity-of-serotonergic-neurons-within-the-dorsal-raphe-nucleus
#9
Antonella Pollano, Verónica Trujillo, Marta M Suárez
Vulnerability to emotional disorders like depression derives from interactions between early and late environments, including stressful conditions. The serotonin (5HT) system is strongly affected by stress and chronic unpredictable stress can alter the 5HT system. We evaluated the distribution of active serotonergic neurons in the dorsal raphe nucleus (DR) through immunohistochemistry in maternally separated and chronically stressed rats treated with an antidepressant, tianeptine, whose mechanism of action is still under review...
November 20, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/29079467/toxoplasma-gondii-infection-causes-structural-changes-in-the-jejunum-of-rats-infected-with-different-inoculum-doses
#10
Suellen Laís Vicentino-Vieira, Marcelo Biondaro Góis, Aline Rosa Trevizan, Lainy Leiny de Lima, Elen Paula Leatte, Gessilda de Alcântara Nogueira de Melo, João Luiz Garcia, Eduardo José de Almeida Araújo, Débora de Mello Gonçales Sant'Ana
AIM: To evaluate the mucosal tunic and submucosal plexus of the jejunum of rats infected with different inoculum doses of Toxoplasma gondii. MAIN METHODS: Rats were infected with different inoculum doses (50, 500, 1000 and 5000 oocysts) of the T. gondii for 30days, while a control group (CG) received saline solution. Blood and feces were collected before euthanasia for analysis of blood and fecal leukocytes (LEs). Histological analysis of the mucosa, submucosa, villi, crypts and enterocytes were performed...
October 25, 2017: Life Sciences
https://www.readbyqxmd.com/read/29063139/dissociable-effects-of-the-kappa-opioid-receptor-agonist-nalfurafine-on-pain-itch-stimulated-and-pain-itch-depressed-behaviors-in-male-rats
#11
Matthew L Lazenka, Megan J Moerke, E Andrew Townsend, Kevin B Freeman, F Ivy Carroll, S Stevens Negus
RATIONALE: Nalfurafine is a G protein signaling-biased kappa opioid receptor (KOR) agonist approved in Japan for second-line treatment of uremic pruritus. Neither nalfurafine nor any other KOR agonist is currently approved anywhere for treatment of pain, but recent evidence suggests that G protein signaling-biased KOR agonists may have promise as candidate analgesics/antipruritics with reduced side effects compared to nonbiased or ß-arrestin-signaling-biased KOR agonists. OBJECTIVES: This study compared nalfurafine effects in rats using assays of pain-stimulated and pain-depressed behavior used previously to evaluate other candidate analgesics...
October 24, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/29054014/sex-differences-in-behavioral-and-neurochemical-effects-of-gonadectomy-and-aromatase-inhibition-in-rats
#12
N Kokras, N Pastromas, D Papasava, C de Bournonville, C A Cornil, C Dalla
Aromatase inhibitors, which are widely used for the treatment of estrogen-dependent cancers, have been associated with psychiatric side effects ranging from mania to depression. In the present study, we investigated sex differences in the behavioral and neurochemical effects of aromatase inhibition on male and female, sham-operated or gonadectomized adult rats. Three weeks after surgery, rats received chronic treatment with the aromatase inhibitor letrozole or vehicle and were then subjected to the open field test, which assesses general activity...
October 10, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29042433/serotonin-decreases-the-gain-of-visual-responses-in-awake-macaque-v1
#13
Lenka Seillier, Corinna Lorenz, Katsuhisa Kawaguchi, Torben Ott, Andreas Nieder, Paria Pourriahi, Hendrikje Nienborg
Serotonin (5HT) is an important neuromodulator in the brain implicated in affective and cognitive functions but its role even for basic cortical processes is controversial. For example, in the mammalian primary visual cortex heterogenous serotonergic modulation has been observed in anesthetized animals. Here, we combined extracellular single unit recordings with iontophoresis in awake animals. We examined the role of serotonin on well-defined tuning properties (orientation, spatial frequency, contrast and size) in the primary visual cortex (V1) of two male macaque monkeys...
October 17, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28993250/monoaminergic-descending-pathways-contribute-to-modulation-of-neuropathic-pain-by-increasing-intensity-treadmill-exercise-after-peripheral-nerve-injury
#14
Victor M Lopez-Alvarez, Maria Puigdomenech, Xavier Navarro, Stefano Cobianchi
This study characterizes the impact of increasing-intensity treadmill exercise (iTR) on noradrenergic (NE) and serotonergic (5HT) modulation of neuropathic pain. Following sciatic nerve transection and repair (SNTR) rats developed significant mechanical and thermal hyperalgesia that was partially prevented by iTR performed during the first 2weeks after injury. Marked decrease in the expression of 5HT2A and α1A and β-, but not α2A adrenergic receptors in the spinal cord dorsal horn was associated to SNTR and recovered by iTR, particularly in lamina II...
January 2018: Experimental Neurology
https://www.readbyqxmd.com/read/28958176/undernutrition-during-pregnancy-and-lactation-increases-the-number-of-fos-cells-in-the-reward-system-in-response-to-a-5-ht6-receptor-agonist-in-male-adolescent-rats
#15
Amanda Alves Marcelino da Silva, Mayara Matias Oliveira, Taisy Cinthia Ferro Cavalcante, Larissa Cavalcanti do Amaral Almeida, Paula Luiza Menezes Cruz, Sandra Lopes de Souza
Undernutrition promotes morphofunctional adaptations in neuroanatomical circuits, leading to behavioural changes. Adolescence is a period of vulnerability for these adaptations, such as the control of food intake and the serotonergic system. The serotonergic system is capable of promoting satiety. However, its role in hedonic control has not been fully elucidated. The involvement of the 5-HT6 receptor in motivational feeding behaviours was recently observed. Therefore, we aimed to evaluate the effect of a 5-HT6 receptor agonist on food intake and neuronal activation in areas of the reward system in adolescent rats subjected to perinatal protein undernutrition...
September 28, 2017: International Journal of Food Sciences and Nutrition
https://www.readbyqxmd.com/read/28943244/new-5-ht1a-5ht2a-and-5ht2c-receptor-ligands-containing-a-picolinic-nucleus-synthesis-in-vitro-and-in-vivo-pharmacological-evaluation
#16
Ferdinando Fiorino, Elisa Magli, Ewa Kędzierska, Antonio Ciano, Angela Corvino, Beatrice Severino, Elisa Perissutti, Francesco Frecentese, Paola Di Vaio, Irene Saccone, Angelo A Izzo, Raffaele Capasso, Paola Massarelli, Ilaria Rossi, Jolanta Orzelska-Gòrka, Jolanta Helena Kotlińska, Vincenzo Santagada, Giuseppe Caliendo
Picolinamide derivatives, linked to an arylpiperazine moiety, were prepared and their affinity to 5-HT1A, 5-HT2A and 5-HT2C receptors was evaluated. The combination of structural elements (heterocyclic nucleus, alkyl chain and 4-substituted piperazine), known to play critical roles in affinity for serotoninergic receptors, and the proper selection of substituents led to compounds with high specificity and affinity towards serotoninergic receptors. In binding studies, several molecules showed high affinity in nanomolar and subnanomolar range at 5-HT1A, 5-HT2A and 5-HT2C receptors and moderate or no affinity for other relevant receptors (D1, D2, α1 and α2)...
October 15, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28911850/activation-of-indoleamine-2-3-dioxygenase-pathway-by-olanzapine-augments-antidepressant-effects-of-venlafaxine-in-mice
#17
Jaya Thomas, Razia Khanam, Divya Vohora
Recent clinical studies report antipsychotics as a better option to augment the action of antidepressants in treatment resistant cases. However, the proper mechanisms underlying the antidepressant effect of antipsychotics is still not clear. Indolamine 2, 3 dioxygenase (IDO) pathway is considered to be an important pathway in pro-inflammatory cytokine associated stress-induced depression. The present study investigated the antidepressant effect of venlafaxine, olanzapine and their combinations in chronic forced-swim stress-induced depression in mice...
December 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28827965/ameliorative-effect-of-curcumin-on-olanzapine-induced-obesity-in-sprague-dawley-rats
#18
Subramani Parasuraman, Khor Ming Zhen, Urmila Banik, Parayil Varghese Christapher
OBJECTIVE: To evaluate the effect of curcumin on olanzapine-induced obesity in rats. MATERIALS AND METHODS: Sprague-Dawley (SD) rats were used for experiments. The animals were divided into six groups, namely, normal control, olanzapine control, betahistine (10 mg/kg), and curcumin 50, 100, and 200 mg/kg treated groups. Except the normal control group, all other animals were administered with olanzapine 4 mg/kg intraperitoneally to induce obesity. The drugs were administered once daily, per oral for 28 days...
July 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/28783033/musculoskeletal-and-nervous-systems-of-the-attachment-organ-in-three-species-of-diplectanum-monogenea-dactylogyroidea
#19
Anatoly A Petrov, Evgenija V Dmitrieva, Maryana P Popyuk, Pavel I Gerasev, Sergey A Petrov
The taxonomy of Diplectanum Diesing, 1858, a genus of monopisthocotylean monogeneans, remains unsettled and needs to be revised based on new morphological criteria. Recent studies in monopisthocotyleans have shown that the muscle arrangement in the posterior attachment organ (haptor) differs between congeneric species and can be used as an additional criterion in genus-level taxonomy. To explore the possibility of using the haptoral musculature and nervous system in the taxonomy of Diplectanum, we conducted a detailed confocal-microscopy study of three species of Diplectanum (D...
July 11, 2017: Folia Parasitologica
https://www.readbyqxmd.com/read/28738100/multiple-neurotoxic-effects-of-haloperidol-resulting-in-neuronal-death
#20
Henry A Nasrallah, Alexander T Chen
BACKGROUND: Several published studies have reported an association between antipsychotic medications, especially first-generation agents, and a decline in gray matter volume. This prompted us to review the possible neurotoxic mechanisms of first-generation antipsychotics (FGAs), especially haloperidol, which has been widely used over the past several decades. METHODS: A PubMed search was conducted using the keywords haloperidol, antipsychotic, neurotoxicity, apoptosis, oxidative stress, and neuroplasticity...
August 2017: Annals of Clinical Psychiatry: Official Journal of the American Academy of Clinical Psychiatrists
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