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Induced hypothermia

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https://www.readbyqxmd.com/read/29773975/cold-shock-induced-protein-rbm3-but-not-mild-hypothermia-protects-human-sh-sy5y-neuroblastoma-cells-from-mpp-induced-neurotoxicity
#1
Hai-Jie Yang, Xiang Shi, Fei Ju, Bei-Ning Hao, Shuang-Ping Ma, Lei Wang, Bin-Feng Cheng, Mian Wang
The cold shock protein RBM3 can mediate mild hypothermia-related protection in neurodegeneration such as Alzheimer's disease. However, it remains unclear whether RBM3 and mild hypothermia provide same protection in model of Parkinson's disease (PD), the second most common neurodegenerative disorder. In this study, human SH-SY5Y neuroblastoma cells subjected to insult by 1-methyl-4-phenylpyridinium (MPP+ ) served as an in-vitro model of PD. Mild hypothermia (32°C) aggravated MPP+ -induced apoptosis, which was boosted when RBM3 was silenced by siRNA...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29769612/hypothermia-broadens-the-therapeutic-time-window-of-mesenchymal-stem-cell-transplantation-for-severe-neonatal-hypoxic-ischemic-encephalopathy
#2
So Yoon Ahn, Yun Sil Chang, Dong Kyung Sung, Se In Sung, Won Soon Park
Recently, we have demonstrated that concurrent hypothermia and mesenchymal stem cells (MSCs) transplantation synergistically improved severe neonatal hypoxic ischemic encephalopathy (HIE). The current study was designed to determine whether hypothermia could extend the therapeutic time window of MSC transplantation for severe neonatal HIE. To induce HIE, newborn rat pups were exposed to 8% oxygen for 2 h following unilateral carotid artery ligation on postnatal day (P) 7. After approving severe HIE involving >50% of the ipsilateral hemisphere volume, hypothermia (32 °C) for 2 days was started...
May 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29768122/long-term-trait-consistency-in-mice-selected-for-swim-induced-high-aerobic-capacity
#3
Julita Sadowska, Andrzej K Gębczyński, Marek Konarzewski
The majority of studies show that metabolic rates are usually repeatable at the individual level, although their repeatabilities tend to decline with time and to be strongly affected by physiological changes. Changes in individual repeatabilities may therefore affect putative differences between experimental groups or populations. This problem is particularly relevant to artificial selection experiments that apply the selection protocol at early life stages, running the risk of a poor correlation of the trait with itself throughout the life cycle of individuals...
July 2018: Physiological and Biochemical Zoology: PBZ
https://www.readbyqxmd.com/read/29756066/postanaesthetic-shivering-from-pathophysiology-to-prevention
#4
REVIEW
Maria Bermudez Lopez
Postoperative shivering is a common complication of anaesthesia. Shivering is believed to increase oxygen consumption, increase the risk of hypoxemia, induce lactic acidosis, and catecholamine release. Therefore, it might increase the postoperative complications especially in high-risk patients. Moreover, shivering is one of the leading causes of discomfort for postsurgical patients. Shivering is usually triggered by hypothermia. However, it occurs even in normothermic patients during the perioperative period...
April 2018: Romanian Journal of Anaesthesia and Intensive Care
https://www.readbyqxmd.com/read/29754932/mild-hypothermia-inhibits-the-notch-3-and-notch-4-activation-and-seizure-after-stroke-in-the-rat-model
#5
Guo-Shuai Yang, Xiao-Yan Zhou, Xue-Fang An, Xuan-Jun Liu, Yan-Jun Zhang, Dan Yu
Ischemic brain injury is an important cause for seizure. Mild hypothermia of the brain or the whole body is an effective way to remit the post-stroke seizure. Our previous study revealed an implication of Notch 1 and 2 in the post-stroke seizure. This study further investigated the involvement of Notch 3 and 4 in post-stroke seizure and the effect of mild hypothermia on these two factors. A global cerebral ischemia (GCI) model was conducted in Sprague Dawley rats. Seizure activity was evaluated by the frequency of seizure attacks, seizure severity scores, and seizure discharges...
May 4, 2018: Pathology, Research and Practice
https://www.readbyqxmd.com/read/29753511/acute-adrenal-cortex-injury-during-cardiopulmonary-bypass-in-a-canine-model
#6
Bo Mei, Song Yang, Yuan Yue, Jian Hou, Keke Wang, Guangxian Chen, Mengya Liang, Zhongkai Wu
OBJECTIVE: Cardiopulmonary bypass (CPB) might induce systemic inflammatory responses that cause acute injuries to multiple organs. However, no direct evidence exists to determine whether CPB leads to adrenal cortex injury or to describe its underlying mechanism. METHODS: Twelve healthy adult beagles were randomly assigned into control and CPB groups. After cannulation, mild hypothermia CPB was performed in the CPB group but not in the control group. The serum concentrations of various cytokines, cortisol, and aldosterone were assessed...
April 11, 2018: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29746591/brown-adipose-tissue-plays-a-central-role-in-systemic-inflammation-induced-sleep-responses
#7
Éva Szentirmai, Levente Kapás
We previously identified brown adipose tissue (BAT) as a source of sleep-inducing signals. Pharmacological activation of BAT enhances sleep while sleep loss leads to increased BAT thermogenesis. Recovery sleep after sleep loss is diminished in mice that lack uncoupling protein 1 (UCP-1), and also in wild-type (WT) mice after sensory denervation of the BAT. Systemic inflammation greatly affects metabolism and the function of adipose tissue, and also induces characteristic sleep responses. We hypothesized that sleep responses to acute inflammation are mediated by BAT-derived signals...
2018: PloS One
https://www.readbyqxmd.com/read/29738273/the-antipyretic-effect-of-paracetamol-occurs-independent-of-transient-receptor-potential-ankyrin-1-mediated-hypothermia-and-is-associated-with-prostaglandin-inhibition-in-the-brain
#8
Elahe Mirrasekhian, Johan L Å Nilsson, Kiseko Shionoya, Anders Blomgren, Peter M Zygmunt, David Engblom, Edward D Högestätt, Anders Blomqvist
The mode of action of paracetamol (acetaminophen), which is widely used for treating pain and fever, has remained obscure, but may involve several distinct mechanisms, including cyclooxygenase inhibition and transient receptor potential ankyrin 1 (TRPA1) channel activation, the latter being recently associated with paracetamol's propensity to elicit hypothermia at higher doses. Here, we examined whether the antipyretic effect of paracetamol was due to TRPA1 activation or cyclooxygenase inhibition. Treatment of wild-type and TRPA1 knockout mice rendered febrile by immune challenge with LPS with a dose of paracetamol that did not produce hypothermia (150 mg/kg) but is known to be analgetic, abolished fever in both genotypes...
May 8, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29737260/targeted-temperature-management-review-of-literature-and-guidelines-a-cardiologist-s-perspective
#9
Taimoor Hashim, Ranjith Shetty
Out of hospital cardiac arrest (OHCA) remains not an uncommon occurrence in USA and rest of the world. However, the survival to discharge following an episode of OHCA in adults is still very disappointing at around 10%. Several areas of improvement including education of general public in early Cardio Pulmonary resuscitation (CPR) by bystander, chest compression first, and improvement of Emergency Medical response time have had a positive effect in outcomes and survival but much still needs to be done. Recently new data has emerged with regards to post resuscitation care and mild induced hypothermia (now preferably called; targeted temperature management {TTM}) and several advances have been made...
May 7, 2018: Current Cardiology Reviews
https://www.readbyqxmd.com/read/29729731/an-amperometric-glutamate-biosensor-for-monitoring-glutamate-release-from-brain-nerve-terminals-and-in-blood-plasma
#10
T Borisova, D Kucherenko, O Soldatkin, I Kucherenko, A Pastukhov, A Nazarova, M Galkin, A Borysov, N Krisanova, A Soldatkin, A El Skaya
An excess of the excitatory neurotransmitter, glutamate, in the synaptic cleft during hypoxia/ischemia provokes development of neurotoxicity and originates from the reversal of Na+ -dependent glutamate transporters located in the plasma membrane of presynaptic brain nerve terminals. Here, we have optimized an electrochemical glutamate biosensor using glutamate oxidase and developed a biosensor-based methodological approach for analysis of rates of tonic, exocytotic and transporter-mediated glutamate release from isolated rat brain nerve terminals (synaptosomes)...
August 31, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29729213/manipulating-trpv1-antagonists-how-to-cool-down-a-hot-molecule
#11
EDITORIAL
Leon Islas, Arpad Szallasi
TRPV1 is a promising pain target. Although a number of small molecule TRPV1 antagonists have been advanced into clinical trials, thus far none has progressed beyond Phase II due to on-target side-effects such as a febrile reaction. In this issue of Acta Physiologica, Romanovsky and colleagues report two TRPV1 antagonists that paradoxically induce hypothermia in experimental animals, potentially opening a new avenue for drug development. This article is protected by copyright. All rights reserved.
May 5, 2018: Acta Physiologica
https://www.readbyqxmd.com/read/29725319/nitric-oxide-synthase-inhibition-as-a-neuroprotective-strategy-following-hypoxic-ischemic-encephalopathy-evidence-from-animal-studies
#12
REVIEW
Laurent M A Favié, Arlette R Cox, Agnes van den Hoogen, Cora H A Nijboer, Cacha M P C D Peeters-Scholte, Frank van Bel, Toine C G Egberts, Carin M A Rademaker, Floris Groenendaal
Background: Hypoxic-ischemic encephalopathy following perinatal asphyxia is a leading cause of neonatal death and disability worldwide. Treatment with therapeutic hypothermia reduced adverse outcomes from 60 to 45%. Additional strategies are urgently needed to further improve the outcome for these neonates. Inhibition of nitric oxide synthase (NOS) is a potential neuroprotective target. This article reviews the evidence of neuroprotection by nitric oxide (NO) synthesis inhibition in animal models...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29719119/thermoregulatory-profile-of-neurodegeneration-induced-dementia-of-the-alzheimer-s-type-using-intracerebroventricular-streptozotocin-in-rats
#13
A C P Motzko-Soares, R C L Vizin, T M S Martins, A R O Hungaro, J R Sato, M C Almeida, D C Carrettiero
AIM: Here, we have extensively investigated the relationship between thermoregulation and neurodegeneration-induced dementia of the Alzheimer's type using intracerebroventricular injections of streptozotocin (icv-STZ). METHODS: Male Wistar rats were treated with bilateral injections of icv-STZ, and their thermoregulatory profiles (core body temperature, tail-skin temperature, cold and heat defence responses and thermal place preference) were evaluated. Spatial memory, locomotor activity, social interaction, brain ventricular volume, and Aβ1-42 and tau protein levels in the brain were analysed in order to characterize the effects of STZ on the brain and behaviour...
May 2, 2018: Acta Physiologica
https://www.readbyqxmd.com/read/29704622/hypothermia-augments-stress-response-in-mammalian-cells
#14
Kattri-Liis Eskla, Rando Porosk, Riin Reimets, Tanel Visnapuu, Eero Vasar, Christian Ansgar Hundahl, Hendrik Luuk
Mild hypothermia (32°C) is routinely used in medical practice to alleviate hypoxic ischemic damage, however, the mechanisms that underlie its protective effects remain uncertain. Using a systems approach based on genome-wide expression screens, reporter assays and biochemical studies, we find that cellular hypothermia response is associated with the augmentation of major stress-inducible transcription factors Nrf2 and HIF1Α affecting the antioxidant system and hypoxia response pathways, respectively. At the same time, NF-κB, a transcription factor involved in the control of immune and inflammatory responses, was not induced by hypothermia...
April 25, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29703025/association-between-perioperative-hypothermia-and-patient-outcomes-after-thoracic-surgery-a-single-center-retrospective-analysis
#15
Alexander Emmert, Gereon Gries, Saskia Wand, Judith Buentzel, Anselm Bräuer, Michael Quintel, Ivo F Brandes
Hypothermia due to anaesthetic-induced impairment of thermoregulatory control and exposure to a cool environment is common in surgical patients. Peripheral vasodilation due to neuroaxial blockade may aggravate hypothermia. There is few data on perioperative hypothermia in patients undergoing thoracic surgery under combined general and regional anesthesia. We reviewed all thoracic surgical patients between 2006 and 2011 to determine the incidence and extent of hypothermia with or without an epidural anesthesia and evaluated its effect...
April 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29668777/combined-effects-of-melatonin-and-topical-hypothermia-on-renal-ischemia-reperfusion-injury-in-rats
#16
Pablo Cambeses Souza, Emanuel Burck Dos Santos, Guilherme Lang Motta, Silvia Regina Bona, Pedro Guilherme Schaefer, Daniela Campagnol, Tiago Bortolini, Carlos Otávio Corso
PURPOSE: To evaluate whether their combination was more effective than either alone in decreasing renal damage due to ischemia/reperfusion (I/R) injury in rats. METHODS: Thirty-two Wistar rats were assigned to four groups. Following right nephrectomy, their left kidneys were subjected to warm ischemia (IR), cold ischemia (TH+IR), intraperitoneal injection of 10 mg/kg melatonin (MEL+IR), or injection of 10 mg/kg melatonin followed by cold ischemia (MEL+TH+IR). Eight randomly assigned right kidneys constituted the control group...
March 2018: Acta Cirúrgica Brasileira
https://www.readbyqxmd.com/read/29667473/harnessing-neuroplasticity-modern-approaches-and-clinical-future
#17
Andrew Octavian Sasmita, Joshua Kuruvilla, Anna Pick Kiong Ling
Neurological diseases and injuries to the nervous system may cause inadvertent damage to neuronal and synaptic structures. Such phenomenon would catastrophically accumulate, leading to the development of neurological and neurodegenerative disorders which might affect memory, cognition, and motoric functions. The body has various negative feedback systems which are able to induce beneficial neuroplastic changes in mediating some neuronal damage, however, such efforts are often not enough to ameliorate the derogatory changes...
April 18, 2018: International Journal of Neuroscience
https://www.readbyqxmd.com/read/29664014/rip-kinase-1-dependent-endothelial-necroptosis-underlies-systemic-inflammatory-response-syndrome
#18
Matija Zelic, Justine E Roderick, Joanne A O'Donnell, Jesse Lehman, Sung Eun Lim, Harish P Janardhan, Chinmay M Trivedi, Manolis Pasparakis, Michelle A Kelliher
Receptor interacting protein kinase 1 (RIPK1) has important kinase-dependent and kinase-independent scaffolding functions that activate or prevent apoptosis or necroptosis in a cell context-dependent manner. The kinase activity of RIPK1 mediates hypothermia and lethality in a mouse model of TNF-induced shock, reflecting the hyperinflammatory state of systemic inflammatory response syndrome (SIRS), where the proinflammatory "cytokine storm" has long been viewed as detrimental. Here, we demonstrate that cytokine and chemokine levels did not predict survival and, importantly, that kinase-inactive Ripk1D138N/D138N hematopoietic cells afforded little protection from TNF- or TNF/zVAD-induced shock in reconstituted mice...
April 16, 2018: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29663449/mild-hypothermia-33%C3%A2-c-increases-the-inducibility-of-atrial-fibrillation-an-in-vivo-large-animal-model-study
#19
Martin Manninger, Alessio Alogna, David Zweiker, Birgit Zirngast, Stefan Reiter, Viktoria Herbst, Heinrich Maechler, Burkert M Pieske, Frank R Heinzel, Helmut Brussee, Heiner Post, Daniel Scherr
OBJECTIVE: Application of therapeutic mild hypothermia in patients after resuscitation, often accompanied by myocardial infarction, cardiogenic shock and systemic inflammation may impact on cardiac rhythm. We therefore tested susceptibility to atrial arrhythmias during hyperthermia (HT, 40.5°C), normothermia (NT, 38.0°C) and mild hypothermia (MH, 33.0°C). METHODS: Nine healthy, anesthetized closed-chest landrace pigs were instrumented with a quadripolar stimulation catheter in the high right atrium and a decapolar catheter in the coronary sinus...
April 16, 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29660342/investigation-of-trpv1-loss-of-function-phenotypes-in-trpv1-leu206stop-mice-generated-by-n-ethyl-n-nitrosourea-mutagenesis
#20
Thomas Christoph, Babette Kögel, Klaus Schiene, Thomas Peters, Wolfgang Schröder
N-ethyl-N-nitrosourea (ENU) random mutagenesis was used to generate a mouse model for the analysis of the transient receptor potential vanilloid 1 (TRPV1) cation channel. A transversion from T→A in exon 4 led to a Leu206Stop mutation generating a loss-of-function mutant. The TRPV1 agonist capsaicin was used to analyze functional and nociceptive parameters in vitro and in vivo in TRPV1 Leu206Stop mice and congenic C3HeB/FeJ controls. Capsaicin-induced [Ca2+ ]i changes in small diameter DRG neurons were significantly diminished in TRPV1 Leu206Stop mice and administration of capsaicin induced neither hypothermia nor nocifensive behaviour in vivo...
April 13, 2018: Biochemical and Biophysical Research Communications
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