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Hypothermia

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https://www.readbyqxmd.com/read/28647359/mild-hypothermia-ameliorates-muscle-wasting-in-septic-rats-associated-with-hypothalamic-ampk-induced-autophagy-and-neuropeptides
#1
Chun Cao, Tao Gao, Minhua Cheng, Fengchan Xi, Chenyan Zhao, Wenkui Yu
Sepsis, always developing muscle wasting, contributes to serious complications and mortality. Mild hypothermia has been reported to have protective effects on the prognosis of septic patients. However, the underlying mechanisms remain unclear. We therefore hypothesized that mild hypothermia could ameliorate muscle wasting during sepsis and whether it was associated with hypothalamus AMPK-induced autophagy and neuropeptides. Adult male Sprague-Dawley rats were intraperitoneally injected with lipopolysaccharide (LPS) (5 mg/kg) or saline...
June 21, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28647176/mitochondrial-oxidative-phosphorylation-efficiency-is-upregulated-during-fasting-in-two-major-oxidative-tissues-of-ducklings
#2
Pierre-Axel Monternier, Loïc Teulier, Jocelyne Drai, Aurore Bourguignon, Delphine Collin-Chavagnac, Frédéric Hervant, Jean-Louis Rouanet, Damien Roussel
Fasted endothermic vertebrates must develop physiological responses to maximize energy conservation and survival. The aim of this study was to determine the effect of 1-wk. fasting in 5-wk. old ducklings (Cairina moschata) from whole-body resting metabolic rate and body temperature to metabolic phenotype of tissues and mitochondrial coupling efficiency. At the level of whole organism, the mass-specific metabolic rate of ducklings was decreased by 40% after 1-wk. of fasting, which was associated with nocturnal Tb declines and shallow diurnal hypothermia during fasting...
June 21, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/28644823/eeg-characteristics-in-cooled-and-rewarmed-periods-in-post-cardiac-arrest-therapeutic-hypothermia-patients
#3
K Kim, Kimberly L Pargeon, Amy S Labar, Oren Friedman, Padmaja N Kandula, Douglas R Labar
PURPOSE: Continuous video EEG is a tool to assess brain function in injuries, including cardiac arrest (CA). In post-CA therapeutic hypothermia (TH) studies, some EEG features are linked to poor prognosis, but the evolvement of EEG characteristics during two temperature phases and its significance is unclear. We systematically analyzed EEG characteristics in cooled and rewarmed phases of post-CA therapeutic hypothermia patients and investigated their correlation to patient outcome. METHODS: This is a retrospective study of EEG analyses, from a single academic center, of 20 patients who underwent CA and therapeutic hypothermia...
July 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28643322/difficulties-in-funding-of-va-ecmo-therapy-for-patients-with-severe-accidental-hypothermia
#4
Sylweriusz Kosiński, Tomasz Darocha, Anna Jarosz, Aleksandra Czerw, Paweł Podsiadło, Tomasz Sanak, Robert Gałązkowski, Jacek Piątek, Janusz Konstanty-Kalandyk, Mirosław Ziętkiewicz, Krzysztof Kusza, Łukasz J Krzych, Rafał Drwiła
BACKGROUND: Severe accidental hypothermia is defined as a core temperature below 28 Celsius degrees. Within the last years, the issue of accidental hypothermia and accompanying cardiac arrest has been broadly discussed and European Resuscitation Council (ERC) Guidelines underline the importance of Extracorporeal Rewarming (ECR) in treatment of severely hypothermic victims. The study aimed to evaluate the actual costs of ECR with VA-ECMO and of further management in the Intensive Care Unit of patients admitted to the Severe Accidental Hypothermia Centre in Cracow, Poland...
2017: Anaesthesiology Intensive Therapy
https://www.readbyqxmd.com/read/28637651/pivotal-role-of-o-glcnac-modification-in-cold-induced-thermogenesis-by-brown-adipose-tissue-through-mitochondrial-biogenesis
#5
Natsuko Ohashi, Katsutaro Morino, Shogo Ida, Osamu Sekine, Mengistu Lemecha, Shinji Kume, Shi-Young Park, Cheol Soo Choi, Satoshi Ugi, Hiroshi Maegawa
Adipose tissues considerably influence metabolic homeostasis, and both white (WAT) and brown adipose tissue (BAT) play significant roles in lipid and glucose metabolism. O-GlcNAc modification is characterized by the addition of N-acetylglucosamine to various proteins by O-GlcNAc transferase (Ogt), subsequently modulating various cellular processes. However, little is known about the role of O-GlcNAc modification in adipose tissues. Here, we report the critical role of O-GlcNAc modification in cold-induced thermogenesis...
June 21, 2017: Diabetes
https://www.readbyqxmd.com/read/28637367/parental-perceptions-of-hypothermia-treatment-for-neonatal-hypoxic-ischaemic-encephalopathy
#6
Balamurugan Thyagarajan, Vijay Baral, Ranjit Gunda, Denise Hart, Lisa Leppard, Brigitte Vollmer
AIMS: Hypothermia Treatment (HT) is now the standard of care for neonatal hypoxic-ischaemic encephalopathy (HIE). We conducted a survey to explore parental perceptions of HT as there is little information about this in the current literature. METHODS: Postal questionnaire survey including families (n=51) whose babies received HT at Princess Anne Hospital, Southampton, UK, with 23 questions covering communication, clinical management, follow-up, and care in general...
June 21, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28634504/the-reemergence-of-eeg-reactivity-after-cardiac-arrest
#7
Joseph Zachariah, Alejandro A Rabinstein
Electroencephalogram (EEG) reactivity has been increasingly utilized in prognostication after cardiac arrest. Recent studies have demonstrated a false-positive rate of 0% in predicting poor outcome with a nonreactive EEG. The reemergence of reactivity after an initial nonreactive EEG has been noted in cases of drug intoxication, rewarming after hypothermia, and after discontinuing sedation. This is the first case describing the reemergence of EEG reactivity without the confounding factors listed above. We describe a case of resuscitated cardiac arrest with initial EEG demonstrating a lack of reactivity...
July 2017: Neurohospitalist
https://www.readbyqxmd.com/read/28632497/dha-reduces-oxidative-stress-following-hypoxia-ischemia-in-newborn-piglets-a-study-of-lipid-peroxidation-products-in-urine-and-plasma
#8
Marianne Ullestad Huun, Håvard T Garberg, Javier Escobar, Consuelo Chafer, Maximo Vento, Ingar M Holme, Ola Didrik Saugstad, Rønnaug Solberg
BACKGROUND: Lipid peroxidation mediated by reactive oxygen species is a major contributor to oxidative stress. Docosahexaenoic acid (DHA) has anti-oxidant and neuroprotective properties. Our objective was to assess how oxidative stress measured by lipid peroxidation was modified by DHA in a newborn piglet model of hypoxia-ischemia (HI). METHODS: Fifty-five piglets were randomized to (i) hypoxia, (ii) DHA, (iii) hypothermia, (iv) hypothermia+DHA or (v) sham. All groups but sham were subjected to hypoxia by breathing 8% O2...
June 20, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/28631110/expression-of-hsp27-and-hsp70-and-vacuolization-in-the-pituitary-glands-in-cases-of-fatal-hypothermia
#9
Elke Doberentz, Philipp Markwerth, Rebecca Wagner, Burkhard Madea
Hypothermia causes systemic cellular stress. The pituitary gland is an endocrine gland and plays an important role in thermoregulation. When the core body temperature drops, the pituitary gland is activated by stimulation of hypothalamic hormones. In this study, we investigated morphological alterations of the pituitary gland in cases of fatal hypothermia. Several morphological alterations of the anterior lobe of the pituitary gland, such as hemorrhage, vacuolization, and hyperemia, have been previously described in fatal hypothermia...
June 19, 2017: Forensic Science, Medicine, and Pathology
https://www.readbyqxmd.com/read/28631089/targeted-temperature-management-in-the-icu-guidelines-from-a-french-expert-panel
#10
REVIEW
Alain Cariou, Jean-François Payen, Karim Asehnoune, Gerard Audibert, Astrid Botte, Olivier Brissaud, Guillaume Debaty, Sandrine Deltour, Nicolas Deye, Nicolas Engrand, Gilles Francony, Stéphane Legriel, Bruno Levy, Philippe Meyer, Jean-Christophe Orban, Sylvain Renolleau, Bernard Vigue, Laure De Saint Blanquat, Cyrille Mathien, Lionel Velly
Over the recent period, the use of induced hypothermia has gained an increasing interest for critically ill patients, in particular in brain-injured patients. The term "targeted temperature management" (TTM) has now emerged as the most appropriate when referring to interventions used to reach and maintain a specific level temperature for each individual. TTM may be used to prevent fever, to maintain normothermia, or to lower core temperature. This treatment is widely used in intensive care units, mostly as a primary neuroprotective method...
December 2017: Annals of Intensive Care
https://www.readbyqxmd.com/read/28630878/prediction-of-brain-tissue-temperature-using-near-infrared-spectroscopy
#11
Lisa Holper, Subhabrata Mitra, Gemma Bale, Nicola Robertson, Ilias Tachtsidis
Broadband near-infrared spectroscopy (NIRS) can provide an endogenous indicator of tissue temperature based on the temperature dependence of the water absorption spectrum. We describe a first evaluation of the calibration and prediction of brain tissue temperature obtained during hypothermia in newborn piglets (animal dataset) and rewarming in newborn infants (human dataset) based on measured body (rectal) temperature. The calibration using partial least squares regression proved to be a reliable method to predict brain tissue temperature with respect to core body temperature in the wavelength interval of 720 to 880 nm with a strong mean predictive power of [Formula: see text] (animal dataset) and [Formula: see text] (human dataset)...
April 2017: Neurophotonics
https://www.readbyqxmd.com/read/28630253/cold-induced-thermogenesis-and-inflammation-associated-cold-seeking-behavior-are-represented-by-different-dorsomedial-hypothalamic-sites-a-three-dimensional-functional-topography-study-in-conscious-rats
#12
Samuel P Wanner, M Camila Almeida, Yury P Shimansky, Daniela L Oliveira, Justin R Eales, Cândido C Coimbra, Andrej A Romanovsky
In the past, we showed that large electrolytic lesions of the dorsomedial hypothalamus (DMH) promoted hypothermia in cold-exposed restrained rats, but attenuated hypothermia in rats challenged with a high dose of bacterial lipopolysaccharide (LPS) in a thermogradient apparatus. The goal of this study was to identify the thermoeffector mechanisms and DMH representation of the two phenomena and, hence, understand how the same lesion could produce two opposite effects on body temperature. We found that the permissive effect of large electrolytic DMH lesions on cold-induced hypothermia was due to suppressed thermogenesis...
June 19, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28629741/establishment-of-an-ideal-time-window-model-in-hypothermic-targeted-temperature-management-after-traumatic-brain-injury-in-rats
#13
Wan-Yong Zhao, Shao-Bo Chen, Jing-Jing Wang, Chao Xu, Ming-Liang Zhao, Hua-Jiang Dong, Hai-Qian Liang, Xiao-Hong Li, Yue Tu, Sai Zhang, Chong Chen, Hong-Tao Sun
Although hypothermic-targeted temperature management (HTTM) holds great potential for the treatment of traumatic brain injury (TBI), translation of the efficacy of hypothermia from animal models to TBI patientshas no entire consistency. This study aimed to find an ideal time window model in experimental rats which was more in accordance with clinical practice through the delayed HTTM intervention. Sprague-Dawley rats were subjected to unilateral cortical contusion injury and received therapeutic hypothermia at 15 mins, 2 hours, 4 hours respectively after TBI...
June 16, 2017: Brain Research
https://www.readbyqxmd.com/read/28629317/surface-hypothermia-predicts-murine-mortality-in-the-intragastric-vibrio-vulnificus-infection-model
#14
Hannah E Gavin, Karla J F Satchell
BACKGROUND: The Gram-negative bacterium Vibrio vulnificus can cause severe disease in humans who consume undercooked, contaminated seafood. To study food-borne V. vulnificus disease in the laboratory, mouse virulence studies predominantly use death as the primary experimental endpoint because behaviorally based moribund status does not consistently predict lethality. This study assessed ventral surface temperature (VST) and its association with mouse survival during V. vulnificus virulence studies as an efficacious, humane alternative...
June 19, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28629243/effect-of-therapeutic-hypothermia-on-myocardial-dysfunction-in-term-neonates-with-perinatal-asphyxia-%C3%A2-a-randomized-controlled-trial
#15
Rakesh Kotha, B Vishnu Bhat, B Adhisivam, P Ajith
OBJECTIVE: To evaluate the effect of therapeutic hypothermia on myocardial dysfunction in term neonates with perinatal asphyxia. MATERIAL AND METHODS: This Randomized Controlled Trial conducted in a tertiary care teaching hospital, south India included 120 newborns with perinatal asphyxia who were randomized to 2 groups (therapeutic hypothermia and normothermia). Cardiac enzyme profile changes between groups were assessed at 0, 24, 72 hrs CPK-MB and troponin I levels were estimated by immune inhibition and quantitative immunochromatography methods respectively...
June 19, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28628913/age-dependent-effects-of-alk5-inhibition-and-mechanism-of-neuroprotection-in-neonatal-hypoxic-ischemic-brain-injury
#16
Brian H Kim, Mariano Guardia Clausi, Michelle Frondelli, Israel C Nnah, Chaitali Saqcena, Radek Dobrowolski, Steven W Levison
Neonatal encephalopathy due to hypoxic-ischemic (HI) brain injury triggers a wave of neuroinflammatory events attributed to causing the progressive degeneration and functional deficits seen weeks after the initial insult. In a recent set of studies, we evaluated the therapeutic efficacy of a small molecule antagonist for ALK5 (activin-like kinase 5 ), TGF-β receptor in a rat model of moderate perinatal HI and found significant improvements in neurologic outcomes. Here, we have extended those studies to evaluate the efficacy of delayed TGF-β receptor antagonism on postnatal day (P) 6 and P9 HI rat pups with and without hypothermia...
June 20, 2017: Developmental Neuroscience
https://www.readbyqxmd.com/read/28627122/a-biotinylated-peptide-bp21-as-a-novel-potent-anti-anaphylactic-agent-targeting-platelet-activating-factor
#17
Akira Sato, Keiichi Ebina
Platelet-activating factor (PAF) is an important mediator of anaphylaxis and is therefore an anti-anaphylactic drug target. We recently reported that synthetic N-terminally biotinylated peptides (BP4-BP29) inhibit PAF by directly interacting with PAF and its metabolite/precursor lyso-PAF. In this study, we investigated whether the biotinylated peptides can inhibit anaphylactic reactions in vivo. In mouse models of anaphylaxis, one of the peptides, BP21, markedly and dose-dependently inhibited hypothermia with a maximum dose-response within 30 min after administration, even at doses 20 times lesser than doses of the known PAF antagonist CV-3988...
June 19, 2017: Journal of Peptide Science: An Official Publication of the European Peptide Society
https://www.readbyqxmd.com/read/28626868/intrathecal-dexamethasone-vs-meperidine-for-prevention-of-shivering-during-transurethral-prostatectomy-a-randomized-controlled-trial
#18
S M Moeen, A M Moeen
BACKGROUND: Shivering is a common complication after spinal anesthesia. Also, during transurethral prostatectomy a large amount of irrigating fluids is used which may cause hypothermia and shivering. We hypothesized that intrathecal dexamethasone could effectively attenuate post-spinal shivering following transurethral prostatectomy as intrathecal meperidine. METHODS: Ninety male patients, ASA II-III, 50-75 years old were included in this prospective and randomized double-blind study...
June 18, 2017: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/28625252/-cerebral-injury-induced-by-heat-stroke-and-the-therapeutic-effect-of-hyperbaric-oxygen-therapy
#19
Xiaoxiao Ni, Zhifeng Liu, Qiuyou Xie, Huasheng Tong, Lei Su, Ronghao Yu
With the global warming, the incidence of heat stroke was significantly higher than before. Severe heat stroke has a high mortality, high morbidity and consolidated central nervous system injury characteristics. The main features of severe heat stroke cerebral injury include cognitive impairment, delirium, convulsions and coma. Its mechanism is related with heat shock induced cerebral tissue ischemia and hypoxia, vascular dysfunction, secondary cascade inflammation and so on. Currently, the main treatment of heat stroke cerebral injury is the hypothermia therapy, dehydration for the reduction of intracranial pressure, naloxone and other cerebral protection and nutrition treatments...
June 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28624412/mild-hypothermia-protects-hippocampal-neurons-against-oxygen-glucose-deprivation-reperfusion-induced-injury-by-improving-lysosomal-function-and-autophagic-flux
#20
Tianen Zhou, Lian Liang, Yanran Liang, Tao Yu, Chaotao Zeng, Longyuan Jiang
Mild hypothermia has been proven to be useful to treat brain ischemia/reperfusion injury. However, the underlying mechanisms have not yet been fully elucidated. The present study was undertaken to determine whether mild hypothermia protects hippocampal neurons against oxygen-glucose deprivation/reperfusion(OGD/R)-induced injury via improving lysosomal function and autophagic flux. The results showed that OGD/R induced the occurrence of autophagy, while the acidic environment inside the lysosomes was altered...
June 15, 2017: Experimental Cell Research
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