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https://www.readbyqxmd.com/read/29134498/vasoplegic-shock-treated-with-methylene-blue-complicated-by-severe-serotonin-syndrome
#1
Betty S Chan, Therese Becker, Angela L Chiew, Ahmed M Abdalla, Tom A Robertson, Xin Liu, Michael S Roberts, Nicholas A Buckley
INTRODUCTION: Management of severe vasoplegic shock in overdose can be very challenging. We describe a case of severe refractory vasodilatory shock in poisoning where methylene blue (MB) was used with success. However, the patient subsequently developed severe Serotonin Syndrome (SS) as a result of an interaction between serotonergic drugs and MB. CASE REPORT: A 15-year-old male developed severe vasoplegic shock 1.5 hours after overdosing on several different medications including quetiapine slow release, quetiapine immediate release, desvenlafaxine slow release, venlafaxine, amlodipine, ramipril, fluoxetine, promethazine and lithium...
November 13, 2017: Journal of Medical Toxicology: Official Journal of the American College of Medical Toxicology
https://www.readbyqxmd.com/read/29133512/exosomes-from-adipose-derived-stem-cells-attenuate-adipose-inflammation-and-obesity-through-polarizing-m2-macrophages-and-beiging-in-white-adipose-tissues
#2
Hui Zhao, Qianwen Shang, Zhenzhen Pan, Yang Bai, Zequn Li, Huiying Zhang, Qiu Zhang, Chun Guo, Lining Zhang, Qun Wang
Adipose-derived stem cells (ADSCs) play critical roles in controlling obesity-associated inflammation and metabolic disorders. Exosomes from ADSCs exert protective effects in several diseases, but their roles in obesity and related pathological conditions remain unclear. Here we showed that treatment of obese mice with ADSC-derived exosomes facilitated their metabolic homeostasis including improved insulin sensitivity (27.8% improvement), reduced obesity and alleviated hepatic steatosis. ADSC-derived exosomes drove M2 macrophage polarization, inflammation reduction and beiging in white adipose tissues (WAT) of diet-induced obese mice...
November 13, 2017: Diabetes
https://www.readbyqxmd.com/read/29133430/the-dual-function-of-the-polybasic-juxtamembrane-region-of-syntaxin-1a-in-clamping-spontaneous-release-and-stimulating-ca-2-triggered-release-in-neuroendocrine-cells
#3
Dafna Singer-Lahat, Noa Barak-Broner, Anton Sheinin, Dafna Greitzer-Antes, Izhak Michaelevski, Ilana Lotan
The exact function of the polybasic juxtamembrane region (5RK) of the plasma membrane neuronal SNARE, syntaxin 1A (Syx), in vesicle exocytosis, although widely studied, is currently not clear. Here, we addressed the role of 5RK in Ca(2+)-triggered release, using our Syx-based intramolecular FRET probe, which previously allowed us to resolve a depolarization-induced Ca(+2)- dependent close-to-open transition (CDO) of Syx that occurs concomitant with evoked release, both in PC12 cells and hippocampal neurons and was abolished upon charge neutralization of 5RK...
November 13, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29127233/vascular-endothelial-function-masks-increased-sympathetic-vasopressor-activity-in-rats-with-metabolic-syndrome
#4
Sylvain Battault, Cindy Meziat, Alessandro R Nascimento, Laura Braud, Sandrine Gayrard, Christian Legros, Frederic De Nardi, Jocelyne Drai, Olivier Cazorla, Jérôme Thireau, Gregory Meyer, Cyril Reboul
OBJECTIVE: Sympathetic hyperactivation, a common feature of obesity and metabolic syndrome, is a key trigger of hypertension. However, some obese subjects with autonomic unbalance present a dissociation between sympathetic activity mediated vasoconstriction and increased blood pressure. Here, we aimed to determine in a rat model of metabolic syndrome, whether the endothelium eNOS-NO pathway contribute to counteract the vasopressor effect of the sympathetic system. METHODS: Rats were fed a high fat and high sucrose diet for 15 weeks (HFS)...
November 10, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29123906/two-cases-with-intra-aortic-balloon-pumping-use-for-severe-septic-cardiomyopathy
#5
Taro Hiromi, Chiaki Toida, Takashi Muguruma, Katsutaka Hashiba, Tomoki Doi, Kyota Nakamura, Naoto Morimura
Cases: Septic cardiomyopathy is defined as a reversible left ventricular systolic dysfunction. Patients with severe septic cardiomyopathy have a high mortality rate, even if they receive conventional therapy. For those patients, previous reports showed intra-aortic balloon pump (IABP) efficacy. We report two rare cases with IABP introduction leading them to drastic improvement, and survival from severe septic cardiomyopathy. Case 1 is a 78-year-old woman diagnosed with renal calculus pyelonephritis, septic shock, and septic cardiomyopathy...
October 2017: Acute Medicine & Surgery
https://www.readbyqxmd.com/read/29122235/-acute-stress-and-broken-heart-syndrome-a-case-report
#6
Juliana Vergel, Sebastián Tamayo-Orozco, Andrés Felipe Vallejo-Gómez, María Teresa Posada, Diana Restrepo
INTRODUCTION: Stress has been associated with an acute heart failure syndrome of important morbidity and mortality. METHODS: Case report and non-systematic review of the relevant literature. CASE PRESENTATION: A 65-year-old woman with a history of an untreated generalized anxiety disorder, whom after the violent death of her son presented with oppressive chest pain irradiated to neck and left superior extremity, lasting for more than 30minutes, initial clinical suspect suggests acute coronary syndrome...
October 2017: Revista Colombiana de Psiquiatría
https://www.readbyqxmd.com/read/29121733/pheochromocytoma-as-a-reversible-cause-of-cardiomyopathy-analysis-and-review-of-the-literature
#7
Rong Zhang, Deepashree Gupta, Stewart G Albert
CONTEXT: Pheochromocytoma and paraganglioma are rare neuroendocrine tumors which overproduce catecholamines and arise from the adrenal gland or extra-adrenal chromaffin cells of the sympathetic and parasympathetic ganglia (1). Excessive catecholamine-induced stimulation of cardiac myocytes leads to damage which manifests in several forms ranging from Takotsubo to dilated cardiomyopathy. Diagnosis of pheochromocytoma-related cardiomyopathies is often delayed due to the atypical presentation associated with many cases...
December 15, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/29120654/-diagnosis-and-management-of-metastatic-pheochromocytoma-and%C3%A2-paraganglioma
#8
Ivana Jochmanová, Ivica Lazúrová
Pheochromocytoma (PHEO) and paraganglioma (PGL) are rare catecholamine-producing neuroendocrine tumors arising from adrenal medulla or extra-adrenal sympathetic and parasympathetic ganglia. Most of the PHEOs/PGLs are benign tumors, but metastatic disease is common, especially in patients with particular genetic background. Although PHEOs/PGLs were described more than a century ago, diagnosis and therapy of metastatic disease are still challenging. Advances in understanding molecular and metabolic changes associated with tumorigenesis lead us to identification of the background of these tumors...
2017: Vnitr̆ní Lékar̆ství
https://www.readbyqxmd.com/read/29119850/dopamine-induces-platelet-production-from-megakaryocytes-via-oxidative-stress-mediated-signaling-pathways
#9
Shilei Chen, Mengjia Hu, Mingqiang Shen, Yang Xu, Cheng Wang, Xinmiao Wang, Fengju Li, Dongfeng Zeng, Fang Chen, Gaomei Zhao, Mo Chen, Fengchao Wang, Tianmin Cheng, Yongping Su, Jinghong Zhao, Song Wang, Junping Wang
Dopamine (DA), a catecholamine neurotransmitter, is known to for its diverse roles on hematopoiesis, yet its function in thrombopoiesis remains poorly understood. This study shows that DA stimulation can directly induce platelet production from megakaryocytes (MKs) in the final stages of thrombopoiesis via a reactive oxygen species (ROS)-dependent pathway. The mechanism was suggested by the results that DA treatment could significantly elevate the ROS levels in MKs, and time-dependently activate oxidative stress-mediated signaling, including p38 mitogen-activated protein kinase, c-Jun NH2-terminal kinase, and caspase-3 signaling pathways, while the antioxidants N-acetylcysteine and L-glutathione could effectively inhibit the activation of these signaling pathways, as well as the ROS increase and platelet production triggered by DA...
November 9, 2017: Platelets
https://www.readbyqxmd.com/read/29119177/physiological-linkage-of-gender-bioavailable-hydroxytyrosol-derivatives-and-their-metabolites-with-systemic-catecholamine-metabolism
#10
R Domínguez-Perles, D Auñón, F Ferreres, A Gil-Izquierdo
Despite extensive characterization of hydroxytyrosol (HT), there is a gap in the knowledge about its capacity to modulate catecholamine pathways. This study deals with the evaluation of the effects of HT, hydroxytyrosol acetate (HTA), and 3,4-dihydroxyphenylacetic acid (DOPAC), as well as their microbial metabolites (homovanillyl alcohol and tyrosol), on the excretion of catecholamines by UHPLC-ESI-QqQ-MS/MS upon administration at 1 and 5 mg kg(-1) to male and female rats. The evaluation of urinary dopamine, norepinephrine, normetanephrine, and 3-methoxytyramine demonstrated 12...
November 9, 2017: Food & Function
https://www.readbyqxmd.com/read/29117176/macrophages-dispose-of-catecholamines-in-adipose-tissue
#11
Michael P Czech
No abstract text is available yet for this article.
November 7, 2017: Nature Medicine
https://www.readbyqxmd.com/read/29116873/the-effect-of-experimental-supplementation-with-the-klamath-algae-extract-klamin-on-attention-deficit-hyperactivity-disorder
#12
Maurizio Cremonte, Davide Sisti, Ilaria Maraucci, Simona Giribone, Evelin Colombo, Marco Bruno Luigi Rocchi, Stefano Scoglio
Attention-deficit/hyperactivity disorder (ADHD) is a chronic neurobiological condition with onset in childhood. The disorder is characterized by inattention, impulsivity, and/or motor hyperactivity, which often affect the development and social integration of affected subjects. Phenylethylamine (PEA), naturally contained in the Klamath Lake microalgae and concentrated in the Klamin(®) extract, is an endogenous molecule with a general neuromodulatory activity. It functions as an activator for the neurotransmission of dopamine and other catecholamines, and very low concentrations of PEA may be associated with specific psychological disorders such as ADHD...
November 8, 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/29116173/incidence-and-prognostic-relevance-of-cardiopulmonary-failure-in-takotsubo-cardiomyopathy
#13
Ibrahim El-Battrawy, Siegfried Lang, Uzair Ansari, Katherine Sattler, Michael Behnes, Katja Schramm, Christian Fastner, Erol Tülümen, Xiaobo Zhou, Ursula Hoffmann, Martin Borggrefe, Ibrahim Akin
Recent studies have indicated that patients with takotsubo cardiomyopathy (TTC) have a higher mortality rate than the general population. There is a distinct possibility that TTC could be associated with adverse life-threatening complications like cardiopulmonary failure. Our institutional database constituted a collective of 114 patients diagnosed with TTC. The frequency, determinants and predictors of cardiopulmonary failure were assessed. The patients were subsequently classified into two groups based on the presence (n = 44, 38...
November 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29116042/correction-the-murine-catecholamine-methyltransferase-mtomt-is-essential-for-mechanotransduction-by-cochlear-hair-cells
#14
Christopher L Cunningham, Zizhen Wu, Aria Jafari, Bo Zhao, Kat Schrode, Sarah Harkins-Perry, Amanda Lauer, Ulrich Müller
No abstract text is available yet for this article.
November 8, 2017: ELife
https://www.readbyqxmd.com/read/29112229/biobehavioral-modulation-of-the-exosome-transcriptome-in-ovarian-carcinoma
#15
Susan K Lutgendorf, Premal H Thaker, Jesusa M Arevalo, Michael J Goodheart, George M Slavich, Anil K Sood, Steve W Cole
BACKGROUND: Social factors in the patient macroenvironment have been shown to influence molecular events in the tumor microenvironment and thereby influence cancer progression. However, biomarkers providing a window into the longitudinal effects of biobehavioral factors on tumor biology over time are lacking. Exosome analysis is a novel strategy for in vivo monitoring of dynamic changes in tumor cells. This study examined exosomal profiles from patients with low or high levels of social support for epithelial-mesenchymal transition (EMT) polarization and gene expression related to inflammation and β-adrenergic signaling...
November 7, 2017: Cancer
https://www.readbyqxmd.com/read/29112103/vasopressin-in-vasodilatory-shock-for-both-left-and-right-heart-anomalous-pediatric-patients-after-cardiac-surgery
#16
Zhongyuan Lu, Xu Wang, Juxian Yang, Shoujun Li, Jun Yan
Although the use of vasopressin has become common place in pediatric patients with vasodilatory shock after cardiac surgery, its efficacy and hemodynamic effects have not been systematically documented. Furthermore, previous studies were mainly limited patients with left heart anomalies. To date, the use of vasopressin in patients with right heart anomalies hasn't yet been reported. To clarify the hemodynamic effects of vasopressin on pediatric patients with vasodilatory shock after cardiopulmonary bypass, 70 consecutive patients, most of whom with right heart anomalies were retrospectively analyzed in Fuwai Hospital from October 2013 to September 2015...
November 3, 2017: Shock
https://www.readbyqxmd.com/read/29112023/behavior-of-anesthesiology-residents-in-a-situation-of-intravenous-route-occlusion-during-syringe-pump-use-in-a-simulated-intensive-care-unit
#17
Takayuki Kariya, Tetsuya Miyashita, Hitoshi Sato, Hiromasa Kawakami, Takahisa Goto
INTRODUCTION: Unintentional catecholamine flush caused by inappropriate release of an intravenous occlusion during use of a syringe pump in the intensive care unit (ICU) can have dangerous consequences in patients receiving critical care. We investigated whether anesthesiology residents understood how to deal with syringe pump occlusion in a simulated ICU setting. METHODS: We set up a mannequin that virtually simulated a sedated patient under mechanical ventilation after cardiac surgery, with epinephrine and dopamine being infused by syringe pumps to maintain blood pressure at 100/50 mm Hg...
November 4, 2017: Journal of Patient Safety
https://www.readbyqxmd.com/read/29110079/old-and-emerging-concepts-on-adrenal-chromaffin-cell-stimulus-secretion-coupling
#18
EDITORIAL
Ricardo Borges, Luis Gandía, Emilio Carbone
The chromaffin cells (CCs) of the adrenal medulla play a key role in the control of circulating catecholamines to adapt our body function to stressful conditions. A huge research effort over the last 35 years has converted these cells into the Escherichia coli of neurobiology. CCs have been the testing bench for the development of patch-clamp and amperometric recording techniques and helped clarify most of the known molecular mechanisms that regulate cell excitability, Ca(2+) signals associated with secretion, and the molecular apparatus that regulates vesicle fusion...
November 6, 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/29107952/hereditary-angioedema-assessing-the-hypothesis-for-underlying-autonomic-dysfunction
#19
Maddalena A Wu, Francesco Casella, Francesca Perego, Chiara Suffritti, Nada Afifi Afifi, Eleonora Tobaldini, Andrea Zanichelli, Chiara Cogliati, Nicola Montano, Marco Cicardi
BACKGROUND: Attacks of Hereditary Angioedema due to C1-inhibitor deficiency (C1-INH-HAE)are often triggered by stressful events/hormonal changes. OBJECTIVE: Our study evaluates the relationship between autonomic nervous system (ANS) and contact/complement system activation. METHODS: Twenty-three HAE patients (6 males, mean age 47.5±11.4 years) during remission and 24 healthy controls (8 males, mean age 45.3±10.6 years) were studied. ECG, beat-by-beat blood pressure, respiratory activity were continuously recorded during rest (10') and 75-degrees-head-up tilt (10')...
2017: PloS One
https://www.readbyqxmd.com/read/29105662/neural-correlates-of-impaired-reward-effort-integration-in-remitted-bulimia-nervosa
#20
Stefanie Verena Mueller, Yosuke Morishima, Simon Schwab, Roland Wiest, Andrea Federspiel, Gregor Hasler
The integration of reward magnitudes and effort costs is required for an effective behavioral guidance. This reward-effort integration was reported to be dependent on dopaminergic neurotransmission. As bulimia nervosa has been associated with a dysregulated dopamine system and catecholamine depletion led to reward processing deficits in remitted bulimia nervosa, the purpose of this study was to identify the role of catecholamine dysfunction and its relation to behavioral and neural reward-effort integration in bulimia nervosa...
November 6, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
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