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dopamin in spinal shock

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https://www.readbyqxmd.com/read/27169082/effect-of-alpha-1-adrenergic-agonist-midodrine-for-the-management-of-long-standing-neurogenic-shock-in-patient-with-cervical-spinal-cord-injury-a-case-report
#1
Taikwan Kim, Cheol Su Jwa
We report a rare case of a 71-year-old male patient who had suffered from long-lasting neurogenic shock for 13 weeks after cervical spinal cord injury (SCI) caused by a bicycle accident. The neurogenic shock was resolved dramatically 2 weeks after the administration of alpha-1-adrenergic agonist, midodrine hydrochloride. In usual cases, neurogenic shock tends to improve between 2 and 6 weeks after SCI; however, in a few cases, the shock lasts for several months. In our case, spinal shock lasted for 13 weeks and exhibited very sensitive decline of blood pressure for even a slight decrease of dopamine despite recovered bulbospongiosus reflex...
October 2015: Korean Journal of Neurotrauma
https://www.readbyqxmd.com/read/23390991/spinal-surgery-in-the-univentricular-heart-is-it-viable
#2
C Pérez-Caballero Macarrón, E Sobrino Ruiz, J Burgos Flores, Jl Vázquez Martínez, A Coca Pérez, E Alvarez Rojas, Jj Sánchez Ruas
INTRODUCTION: The management of patients with Fontan physiology who undergo scoliosis surgery is difficult. The purpose of this article was to describe our experience in the management of patients with Fontan circulation undergoing spinal surgery for correction of scoliosis. MATERIALS AND METHODS: This was a retrospective study including patients with Fontan physiology who underwent spinal orthopaedic surgery. Anaesthetic management, post-operative complications, paediatric intensive care unit and total hospital stay, and the need for blood transfusions were analysed...
February 2014: Cardiology in the Young
https://www.readbyqxmd.com/read/23281025/early-interneuron-dysfunction-in-als-insights-from-a-mutant-sod1-zebrafish-model
#3
Alexander McGown, Jonathan R McDearmid, Niki Panagiotaki, Huaxia Tong, Sufana Al Mashhadi, Natasha Redhead, Alison N Lyon, Christine E Beattie, Pamela J Shaw, Tennore M Ramesh
OBJECTIVE: To determine, when, how, and which neurons initiate the onset of pathophysiology in amyotrophic lateral sclerosis (ALS) using a transgenic mutant sod1 zebrafish model and identify neuroprotective drugs. METHODS: Proteinopathies such as ALS involve mutant proteins that misfold and activate the heat shock stress response (HSR). The HSR is indicative of neuronal stress, and we used a fluorescent hsp70-DsRed reporter in our transgenic zebrafish to track neuronal stress and to measure functional changes in neurons and muscle over the course of the disease...
February 2013: Annals of Neurology
https://www.readbyqxmd.com/read/21194595/allergic-shock-and-death-associated-with-protamine-administration-in-a-diabetic-patient
#4
Yan-Qi Chu, Li-Jian Cai, De-Chun Jiang, Dan Jia, Su-Ying Yan, Yu-Qin Wang
BACKGROUND: Insulin is used to treat patients with both type 1 and type 2 diabetes mellitus. Allergic reactions to insulin might be triggered by insulin itself or inactive ingredients in the insulin formulation, including proteins such as protamine in neutral protamine Hagedorn (NPH) insulin. The use of highly purified animal insulin and human recombinant insulin has reduced the incidence of anaphylactic reactions to insulin from ~30% to <1%. OBJECTIVE: We report a case of fatal allergic shock after the administration of protamine in a patient with a history of allergy to fish and a protamine-containing insulin...
September 2010: Clinical Therapeutics
https://www.readbyqxmd.com/read/18387853/affective-analgesia-following-muscarinic-activation-of-the-ventral-tegmental-area-in-rats
#5
Robert G Kender, Steven E Harte, Elizabeth M Munn, George S Borszcz
UNLABELLED: Cholinergic stimulation of dopamine neurons in the ventral tegmental area (VTA) underlies activation of the brain reward circuitry. Activation of this circuit is proposed to preferentially suppress the affective reaction to noxious stimulation. Vocalization afterdischarges (VADs) are a validated model of the affective response of rats to noxious tail shock. The antinociceptive action of the acetylcholine agonist carbachol microinjected into the VTA on VAD threshold was compared with its effect on the thresholds of other tail shock-elicited responses (VDS, vocalizations during shock; SMR, spinal motor reflexes)...
July 2008: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/18363043/hypothalamic-injury-as-a-cause-of-refractory-hypotension-after-sellar-region-tumor-surgery
#6
K A Popugaev, I A Savin, A S Goriachev, B A Kadashev
INTRODUCTION: Fluid-resistant arterial hypotension can result in hypoperfusion of the brain and other organs. Well-known causes of arterial hypotension in neurosurgical practice include cardiac failure, septic shock, adrenal insufficiency, brainstem, and cervical spinal cord damage. Fluid-resistant arterial hypotension can occur in patients with brain edema without damage to brainstem when hypothalamic nuclei suffer. This phenomenon is not a well-documented cause of hypotension. METHODS: We prospectively investigated 15 cases with clinical syndrome of arterial hypotension in patients following surgery for sellar region tumors...
2008: Neurocritical Care
https://www.readbyqxmd.com/read/16698879/suppression-of-parkin-enhances-nigrostriatal-and-motor-neuron-lesion-in-mice-over-expressing-human-mutated-tau-protein
#7
J Menéndez, J A Rodríguez-Navarro, R M Solano, M J Casarejos, I Rodal, R Guerrero, M P Sánchez, J Avila, M A Mena, J G de Yébenes
Abnormal deposition of protein tau takes place in the brain of patients with several neurodegenerative diseases. Few of these patients present frontotemporal dementia with parkinsonism and amyotrophy (FTDPA-17), an autosomal dominant tauopathy related to mutations of the gene that codes for protein tau, localized in chromosome 17. The great majority of patients with tauopathies such as Alzheimer's disease, sporadic frontotemporal dementia or progressive supranuclear palsy do not show a Mendelian pattern of inheritance...
July 1, 2006: Human Molecular Genetics
https://www.readbyqxmd.com/read/16615686/cardiac-organ-donor-management
#8
REVIEW
Sana Ullah, Luis Zabala, Bryan Watkins, Michael L Schmitz
There is a critical shortage of donor organs. According to the United Network for Organ Sharing (UNOS), 20% of organs are discarded after procurement. Many of these may be potentially salvageable. Brain death is particularly detrimental to cardiac function. The initial sympathetic storm can produce direct myocardial injury. The ensuing spinal shock reduces global oxygen delivery. There is a change to anaerobic metabolism due to global mitochondrial dysfunction. Diabetes insipidus worsens hypovolemia and thyroid deficiency impairs cardiac function...
March 2006: Perfusion
https://www.readbyqxmd.com/read/15661450/activation-of-5-ht1a-and-5-ht7-receptors-in-the-parafascicular-nucleus-suppresses-the-affective-reaction-of-rats-to-noxious-stimulation
#9
COMPARATIVE STUDY
Steven E Harte, Robert G Kender, George S Borszcz
The antinociceptive effects of the serotonin (5-HT)1A/7 receptor agonist 8-hydroxy-dipropylaminotetralin (8-OH-DPAT) administered into the medial thalamus were evaluated. Pain behaviors organized at spinal (spinal motor reflexes, SMRs), medullary (vocalizations during shock, VDSs), and forebrain (vocalization after discharges, VADs) levels of the neuraxis were elicited by tailshock. Administration of 8-OH-DPAT (5, 10, and 20 microg/side) into nucleus parafascicularis (nPf) produced dose-dependent increases in VDS and VAD thresholds, but failed to elevate SMR threshold...
February 2005: Pain
https://www.readbyqxmd.com/read/12620265/yersinia-septic-shock-following-an-autologous-transfusion-in-a-pediatric-patient
#10
REVIEW
Sandra Benavides, Kathleen Nicol, Katalin Koranyi, Milap C Nahata
Although the literature on infections transmitted via transfused blood focuses on viruses, Yersinia enterocolitica can also cause severe infections in patients receiving transfusions. A 13-year-old patient developed severe sepsis after an autologous blood transfusion contaminated with Y. enterocolitica. The patient was an otherwise healthy female undergoing posterior spinal fusion for congenital scoliosis. Prior to surgery, the patient donated blood for perioperative and postoperative use. A few days before the donation, she had complained of abdominal pain and was experiencing mild diarrhea...
February 2003: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/10570779/-distributive-shock-and-it-s-therapy-by-cardio-vascular-acting-drugs
#11
REVIEW
R Ogawa
Distributive shock is defined as circulatory insufficiency induced by excessive dilatation of the peripheral vasculature or maldistribution of cardiac output. Septicemia, systemic inflammatory response syndrome, anaphylaxis, injuries to the central nervous system, and drug intoxication are causative factors of shock. Circulatory derangements induced by bacterial infection have been divided into hyperdynamic and hypodynamic shock. Administration of inotropic drugs, vasopressors, and/or vasodilators are primary treatments in this type of shock...
October 1999: Nihon Geka Gakkai Zasshi
https://www.readbyqxmd.com/read/8352022/dopaminergic-influence-on-the-excitability-of-antidromically-activated-renshaw-cells-in-the-lumbar-spinal-cord-of-the-rat
#12
K K Maitra, P Seth, M Thewissen, H G Ross, D K Ganguly
The interaction between dopaminergic and cholinergic systems in the mammalian central nervous system, which is thought to have important implications in the pathophysiology of major extrapyramidal disorders, has never been adequately demonstrated in vivo. Renshaw cell burst responses to single electrical shocks to lumbar ventral roots in spinalized and decerebrated rats were studied. In this monosynaptic cholinergic pathway, apomorphine, a dopaminergic receptor agonist, inhibited whereas the D2-antagonist sulpiride facilitated the burst responses...
June 1993: Acta Physiologica Scandinavica
https://www.readbyqxmd.com/read/8233099/evidence-for-d1-dopamine-receptor-mediated-modulation-of-the-synaptic-transmission-from-motor-axon-collaterals-to-renshaw-cells-in-the-rat-spinal-cord
#13
P Seth, M Gajendiran, K K Maitra, H G Ross, D K Ganguly
The possible modulatory role of D1 dopamine receptors on the excitability of lumbar spinal Renshaw cells was studied in anesthetized rats spinalized at T4 level. Burst responses elicited by single electrical shocks to ipsilateral ventral roots L6 (frequency 0.5 Hz, stimulus width 0.1 ms) and spontaneous activity were recorded extracellularly using conventional 3 M KCl filled glass micropipettes. The specific D1 agonist SKF 38393 (0.5-1 mg/kg i.v.) enhanced Renshaw cell burst responses by 20-60% (n = 7) and increased their spontaneous discharge rate (n = 3)...
August 20, 1993: Neuroscience Letters
https://www.readbyqxmd.com/read/6887667/adrenal-medullary-secretion-of-dopamine-in-response-to-hemorrhagic-and-endotoxin-induced-shock-in-dogs
#14
T Ohmiya
Adrenal medullary secretion of dopamine (DA) was investigated during acute hemorrhagic and endotoxin-induced shock in mongrel dogs. Blood samples were collected directly from the adrenal vein and DA content was measured using gas-liquid chromatography equipped with an electron-capture detector (GLC-ECD). The adrenal medullary secretion of DA increased markedly during hemorrhagic and endotoxin-induced shock. In the former, the rate of secretion of DA increased from 0.22 ng/kg/min to 10.7 ng/kg/min in 90 min...
March 1983: Japanese Journal of Surgery
https://www.readbyqxmd.com/read/3133452/intrathecal-noradrenaline-restores-5-methoxy-n-n-dimethyltryptamine-induced-antinociception-abolished-by-intrathecal-6-hydroxydopamine
#15
B G Minor, M L Persson, C Post, G Jonsson, T Archer
Intrathecal administration of 6-hydroxydopamine (6-OHDA) abolished the antinociceptive effects of acute administration of 5-methoxy-N,N-dimethyltryptamine (5-MeODMT, 1 mg/kg, s.c.) in the hot-plate, tail-flick and shock titration tests of nociception. The antinociceptive effects of 5-MeODMT, abolished by the prior intrathecal 6-OHDA treatment, were restored by intrathecal administration (2 or 1 microgram) of noradrenaline (NA), immediately prior to 5-MeODMT, in all three tests of nociception. Biochemical analysis confirmed severe NA depletions (95 percent loss) in the lumbar and thoracic regions of the spinal and much lesser dopamine depletions (25-35 percent loss)...
1988: Journal of Neural Transmission
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