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https://www.readbyqxmd.com/read/29214400/vasomodulatory-effects-of-the-angiotensin-ii-type-1-receptor-antagonist-losartan-on-experimentally-induced-cerebral-vasospasm-after-subarachnoid-haemorrhage
#1
Stefan Wanderer, Jan Mrosek, Gessler Florian, Seifert Volker, Juergen Konczalla
BACKGROUND: Cerebral vasospasm following subarachnoid haemorrhage (SAH) remains one of the major factors contributing to poor overall patient outcome. Prostaglandin F2-alpha (PGF2a) induces vasoconstriction. After SAH, PGF2a leads to cerebral inflammation and enhanced vasoconstriction, resulting in cerebral vasospasm. Losartan is already known to have beneficial effects in stroke models and also on several cerebral inflammatory processes. Therefore, the aim of the study was to analyse the effect of losartan on PGF2a-enhanced vasoconstriction after SAH...
December 6, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29178941/s100a8-a9-and-srage-kinetic-after-polytrauma-an-explorative-observational-study
#2
Philippe Joly, John C Marshall, Philippe A Tessier, Chantal Massé, Nathalie Page, Anne Julie Frenette, François Khazoom, Soazig Le Guillan, Yves Berthiaume, Emmanuel Charbonney
BACKGROUND: Following tissue injury after trauma, the activation of innate immune pathways results in systemic inflammation, organ failure and an increased risk of infections. The objective of this study was to characterize the kinetics of the S100A8/S100A9 complex, a new-recognized alarmin, as well as its soluble receptor sRAGE, over time after trauma as potential early biomarkers of the risk of organ damage. METHODS: We collected comprehensive data from consenting patients admitted to an ICU following severe trauma...
November 25, 2017: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
https://www.readbyqxmd.com/read/29167404/a-critical-role-for-dopamine-d5-receptors-in-pain-chronicity-in-male-mice
#3
Salim Megat, Stephanie Shiers, Jamie K Moy, Paulino Barragan-Iglesias, Grishma Pradhan, Rebecca P Seal, Gregory Dussor, Theodore J Price
Dopaminergic modulation of spinal cord plasticity has long been recognized but circuits affected by this system and the precise receptor subtypes involved in this modulation have not been defined. Dopaminergic modulation from the A11 nucleus of the hypothalamus contributes to plasticity in a model of chronic pain called hyperalgesic priming. Here we tested the hypothesis that the key receptor subtype mediating this effect is the D5 receptor (D5R). We find that a spinally-directed lesion of dopaminergic neurons reverses hyperalgesic priming in both sexes and that a D1/D5 antagonist transiently inhibits neuropathic pain...
November 22, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29164312/efficacy-and-safety-of-rotigotine-in-elderly-patients-with-parkinson-s-disease-in-comparison-with-the-non-elderly-a-post-hoc-analysis-of-randomized-double-blind-placebo-controlled-trials
#4
Masahiro Nomoto, Hirotaka Iwaki, Hiroyuki Kondo, Masaya Sakurai
Rotigotine-a non-ergot dopamine agonist-has two advantages; it can stimulate all dopamine receptors (D1-D5) like innate dopamine, and its transdermal administration provides continuous dopaminergic stimulation. The age of the patient impacts the effect and adverse events of anti-parkinsonian treatment. We conducted a post hoc analysis on three randomized, double-blind, placebo-controlled trials performed in Japan to clarify the difference of anti-parkinsonian treatment in elderly and non-elderly patients. Data from two combination therapy trials (with levodopa) in advanced stage Parkinson's disease patients and one monotherapy trial in early stage patients were pooled and grouped by age (non-elderly aged < 70, elderly aged 70 +)...
November 21, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/29163081/activation-of-d1-5-dopamine-receptors-in-the-dorsal-medial-prefrontal-cortex-promotes-incubated-like-aversive-responses
#5
Fernando Castillo Díaz, Cecilia P Kramar, Micaela A Hernandez, Jorge H Medina
It is well established that neurons of the mammalian medial prefrontal cortex (mPFC) modulate different behavioral outputs, including several memory types. This behavioral modulation is, at least in part, under the control of the D1-like Dopamine (DA) receptor (D1/5R) which comprises D1 and D5-specific subtypes (D1R and D5R, respectively). Here, combining a set of behavioral assays with pharmacology, we determined whether the activation of D1/5R in the mPFC during almost neutral or weak negative-valence experiences induces aversive behaviors...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/29123927/locus-coeruleus-and-dopamine-dependent-memory-consolidation
#6
REVIEW
Miwako Yamasaki, Tomonori Takeuchi
Most everyday memories including many episodic-like memories that we may form automatically in the hippocampus (HPC) are forgotten, while some of them are retained for a long time by a memory stabilization process, called initial memory consolidation. Specifically, the retention of everyday memory is enhanced, in humans and animals, when something novel happens shortly before or after the time of encoding. Converging evidence has indicated that dopamine (DA) signaling via D1/D5 receptors in HPC is required for persistence of synaptic plasticity and memory, thereby playing an important role in the novelty-associated memory enhancement...
2017: Neural Plasticity
https://www.readbyqxmd.com/read/29119585/effects-of-dopamine-receptor-antagonist-antipsychotic-therapy-on-blood-pressure
#7
REVIEW
N H Gonsai, V H Amin, C G Mendpara, R Speth, G M Hale
WHAT IS KNOWN AND OBJECTIVE: Hypertension, a major risk factor for adverse cardiovascular events, such as stroke and myocardial infarction, affects 80 million American adults. The aetiology of hypertension is multifaceted and difficult to identify. Dopamine receptors, especially those in the kidneys, play a role in blood pressure regulation, and alterations in their function can cause hypertension. The objective of this review was to investigate the association between the use of dopamine antagonists with hypertension focusing especially on second-generation antipsychotics, like clozapine that is D4 receptor antagonist...
November 8, 2017: Journal of Clinical Pharmacy and Therapeutics
https://www.readbyqxmd.com/read/29106549/the-in-vitro-actions-of-loxapine-on-dopaminergic-and-serotonergic-receptors-time-to-consider-atypical-classification-of-this-antipsychotic-drug
#8
Florian Ferreri, Dominique Drapier, Emmanuelle Baloche, Mehemed Ouzid, Luc Zimmer, Pierre-Michel Llorca
Background: The denomination of typical antipsychotic for loxapine has poor relation to current knowledge of the molecule's relevant modes of action. Method: Competition binding experiments were performed on expressed human recombinant receptors in CHO cells and HEK-293 cells for D1 to D5, 5-HT1A, 5-HT2A, 5-HT2C, 5-HT4, 5-HT6, and 5-HT7. In vitro autoradiographies using [ 11C]-Raclopride [18F]-Altanserin [18F]-MPPF [11C]-SB207145 and [18F]-2FNQ1P were measured in brain tissue of a male primate followed by addition of increasing doses of loxapine succinate...
November 2, 2017: International Journal of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29056909/the-dopamine-d5-receptor-is-involved-in-working-memory
#9
Gregory V Carr, Federica Maltese, David R Sibley, Daniel R Weinberger, Francesco Papaleo
Pharmacological studies indicate that dopamine D1-like receptors (D1 and D5) are critically involved in cognitive function. However, the lack of pharmacological ligands selective for either the D1 or D5 receptors has made it difficult to determine the unique contributions of the D1-like family members. To circumvent these pharmacological limitations, we used D5 receptor homozygous (-/-) and heterozygous (+/-) knockout mice, to identify the specific role of this receptor in higher order cognitive functions. We identified a novel role for D5 receptors in the regulation of spatial working memory and temporal order memory function...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28975698/dopamine-d4-receptor-activation-restores-ca1-ltp-in-hippocampal-slices-from-aged-mice
#10
Fangli Guo, Jianhua Zhao, Dandan Zhao, Jiangang Wang, Xiaofang Wang, Zhiwei Feng, Martin Vreugdenhil, Chengbiao Lu
Normal aging is characterized with a decline in hippocampal memory functions that is associated with changes in long-term potentiation (LTP) of the CA3-to-CA1 synapse. Age-related deficit of the dopaminergic system may contribute to impairment of CA1 LTP. Here we assessed how the modulation of CA1 LTP by dopamine is affected by aging and how it is dependent on the Ca(2+) source. In slices from adult mice, the initial slope of the field potential showed strong LTP, but in slices from aged mice LTP was impaired...
December 2017: Aging Cell
https://www.readbyqxmd.com/read/28955227/stress-induced-reduction-of-dorsal-striatal-d2-dopamine-receptors-prevents-retention-of-a-newly-acquired-adaptive-coping-strategy
#11
Paolo Campus, Sonia Canterini, Cristina Orsini, Maria Teresa Fiorenza, Stefano Puglisi-Allegra, Simona Cabib
The inability to learn an adaptive coping strategy in a novel stressful condition leads to dysfunctional stress coping, a marker of mental disturbances. This study tested the involvement of dorsal striatal dopamine receptors in the dysfunctional coping with the Forced Swim test fostered by a previous experience of reduced food availability. Adult male mice were submitted to a temporary (12 days) reduction of food availability [food-restricted (FR)] or continuously free-fed (FF). Different groups of FF and FR mice were used to evaluate: (1) dorsal striatal mRNA levels of the two isoforms of the dopamine D2 receptor (D2S, D2L)...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28950781/blockade-of-dopamine-d1-family-receptors-attenuates-the-mania-like-hyperactive-risk-preferring-and-high-motivation-behavioral-profile-of-mice-with-low-dopamine-transporter-levels
#12
Morgane Milienne-Petiot, Lucianne Groenink, Arpi Minassian, Jared W Young
BACKGROUND: Patients with bipolar disorder mania exhibit poor cognition, impulsivity, risk-taking, and goal-directed activity that negatively impact their quality of life. To date, existing treatments for bipolar disorder do not adequately remediate cognitive dysfunction. Reducing dopamine transporter expression recreates many bipolar disorder mania-relevant behaviors (i.e. hyperactivity and risk-taking). The current study investigated whether dopamine D1-family receptor blockade would attenuate the risk-taking, hypermotivation, and hyperactivity of dopamine transporter knockdown mice...
October 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28940477/camp-levels-in-lymphocytes-and-cd4-regulatory-t-cell-functions-are-affected-by-dopamine-receptor-gene-polymorphisms
#13
Marco Cosentino, Natasa Kustrimovic, Marco Ferrari, Emanuela Rasini, Franca Marino
The neurotransmitter dopamine (DA) has prominent effects in the immune system and between the immune cells, CD4+ regulatory T lymphocytes (Treg), a specialized T cell subsets crucial for the control of immune homeostasis, are especially sensitive to DA. Dopaminergic receptors (DR) are grouped into two families according to their pharmacological profile and main second messenger coupling: the D1 -like (D1 and D5 ) which activate adenylate cyclase and the D2 -like (D2 , D3 and D4 ) which inhibit adenylate cyclase and exist in several variants, which have been associated to clinical conditions such as schizophrenia, bipolar disorder, substance abuse and addiction...
September 20, 2017: Immunology
https://www.readbyqxmd.com/read/28922504/selective-remodeling-of-glutamatergic-transmission-to-striatal-cholinergic-interneurons-after-dopamine-depletion
#14
Jose de Jesus Aceves Buendia, Lior Tiroshi, Wei-Hua Chiu, Joshua A Goldberg
The widely held view that the pathophysiology of Parkinson's disease arises from an under-activation of the direct pathway striatal spiny neurons (dSPNs) has gained support from a recently described weakening of the glutamatergic projection from the parafascicular nucleus (PfN) to dSPNs in experimental parkinsonism. However, the impact of the remodeling of the thalamostriatal projection cannot be fully appreciated without considering its impact on cholinergic interneurons (ChIs) that themselves preferentially activate indirect pathway spiny neurons (iSPNs)...
September 18, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28894586/a-pilot-study-on-the-impact-of-dopamine-serotonin-and-brain-derived-neurotrophic-factor-genotype-on-long-term-functional-outcomes-after-subarachnoid-hemorrhage
#15
Ansley Stanfill, Claire Simpson, Paula Sherwood, Samuel Poloyac, Elizabeth Crago, Hyungsuk Kim, Yvette Conley
OBJECTIVES: Many that survive an aneurysmal subarachnoid hemorrhage experience lasting physical disability, which might be improved by medications with effects on the dopaminergic, serotonergic, and brain-derived neurotrophic factor neurotransmitter systems. But it is not clear which patients are most likely to benefit from these therapies. The purpose of this pilot study was to explore the relationship of genetic polymorphisms in these pathways with 12-month functional outcomes after aneurysmal subarachnoid hemorrhage...
2017: SAGE Open Medicine
https://www.readbyqxmd.com/read/28883634/association-of-the-resolvin-precursor-17-hdha-but-not-d-or-e-series-resolvins-with-heat-pain-sensitivity-and-osteoarthritis-pain-in-humans
#16
Ana M Valdes, Srinivasarao Ravipati, Cristina Menni, Abhishek Abhishek, Sarah Metrustry, Juliette Harris, Ayrun Nessa, Frances M K Williams, Tim D Spector, Michael Doherty, Victoria Chapman, David A Barrett
Resolvins are omega-3 fatty acid derived potent bioactive lipids that resolve inflammation and modulate transient receptor potential channels. Exogenous administration of the resolvin precursor 17-HDHA shows a strong analgesic effect in animal models of osteoarthritis and acute inflammatory pain, but has not been studied in humans. Our aim was to assess the role of 17-HDHA and resolvins in heat pain sensitivity and in osteoarthritis pain in humans. Resolvins D1, D2, D3, D5, E1 and 17-HDHA, were measured by liquid chromatography-mass spectrometry and tested for association with heat pain thresholds in 250 healthy volunteers who had undergone quantitative sensory testing...
September 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28855632/resolution-agonist-15-epi-lipoxin-a4-programs-early-activation-of-resolving-phase-in-post-myocardial-infarction-healing
#17
Vasundhara Kain, Fei Liu, Veronika Kozlovskaya, Kevin A Ingle, Subhashini Bolisetty, Anupam Agarwal, Santosh Khedkar, Sumanth D Prabhu, Eugenia Kharlampieva, Ganesh V Halade
Following myocardial infarction (MI), overactive inflammation remodels the left ventricle (LV) leading to heart failure coinciding with reduced levels of 15-epi-Lipoxin A4 (15-epi LXA4). However, the role of 15-epi LXA4 in post-MI acute inflammatory response and resolving phase is unclear. We hypothesize that liposomal fusion of 15-epi-LXA4 (Lipo-15-epi-LXA4) or free 15-epi-LXA4 will expedite the resolving phase in post-MI inflammation. 8 to 12-week-old male C57BL/6 mice were subjected to permanent coronary artery ligation...
August 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28760699/modulation-of-the-storage-of-social-recognition-memory-by-neurotransmitter-systems-in-the-insular-cortex
#18
Lorena E S Cavalcante, Carolina G Zinn, Scheila D Schmidt, Bruna F Saenger, Flávia F Ferreira, Cristiane R G Furini, Jociane C Myskiw, Ivan Izquierdo
The insular cortex (IC) receives projections from prefrontal, entorhinal and cingulate cortex, olfactory bulb and basal nuclei and has reciprocal connections with the amygdala and entorhinal cortex. These connections suggest a possible involvement in memory processes; this has been borne out by data on several behaviors. Social recognition memory (SRM) is essential to form social groups and to establish hierarchies and social and affective ties. Despite its importance, knowledge about the brain structures and the neurotransmitter mechanisms involved in its processing is still scarce...
July 29, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28758253/mir-182-selectively-targets-hoxa10-in-goat-endometrial-epithelium-cells-in-vitro
#19
L Zhang, X-R Liu, J-Z Liu, Y-X Song, Z-Q Zhou, B-Y Cao
Proper HOXA10 expression was essential for endometrial receptivity what was crucial for successful embryo implantation in mammalian. This study confirmed that miR-182 regulated the expression levels of HOXA10 by binding to its 3' UTR, selectively downregulated HOXA10 in goat endometrial epithelium cells (gEECs) but not stromal cell (gESCs) in vitro. However, HOXA10 and miR-182 both up-expressed in the goat endometrium at gestational day 15 (D15) compared with gestational day 5 (D5), suggesting that there were some other factors regulated the expression of HOXA10 during the development of goat endometrium in vivo...
July 30, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28678802/mir-182-aids-in-receptive-endometrium-development-in-dairy-goats-by-down-regulating-ptn-expression
#20
Lei Zhang, Xiaorui Liu, Junze Liu, Zhanqin Zhou, Yuxuan Song, Binyun Cao, Xiaopeng An
Increasing evidence has shown that miRNAs play important roles in endometrium development during the menstrual cycle in humans and many other animals. Our previous data indicated that miR-182 levels increase 15.55-fold and pleiotrophin (PTN) levels decrease 20.97-fold in the receptive endometrium (RE, D15) compared with the pre-receptive endometrium (PE, D5) in dairy goats. The present study shows that miR-182 is widely expressed in different tissues of dairy goats and that its expression levels are regulated by E2 and P4 in endometrial epithelium cells (EECs)...
2017: PloS One
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