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Medical Gas Research

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https://www.readbyqxmd.com/read/28480035/meeting-report-6-th-negative-hydrogen-ions-international-academic-forum
#1
He Li, Ning Zhang, Ou-Yang Chen
No abstract text is available yet for this article.
January 2017: Medical Gas Research
https://www.readbyqxmd.com/read/28480034/co-administration-of-tissue-plasminogen-activator-and-hyperbaric-oxygen-in-ischemic-stroke-a-continued-promise-for-neuroprotection
#2
REVIEW
Ze-Song Yang, Jun Mu
Intravenous recombinant tissue-type plasminogen activator (r-tPA, alteplase) remains the recommended therapy for acute ischemic stroke. However, several factors are limiting its practical use. It makes it urgent for us to search more efficient strategies that can save the ischemic neurons, and safely extend the time window, while in the mean time reducing the detrimental effects for stroke thrombolysis. Hyperbaric oxygen therapy (HBOT) is considered to be potentially neuroprotective. Co-administration of r-tPA and HBOT has already been proved to be effective, safe and feasible in myocardial infarction...
January 2017: Medical Gas Research
https://www.readbyqxmd.com/read/28480033/in-vivo-electron-paramagnetic-resonance-oximetry-and-applications-in-the-brain
#3
REVIEW
John M Weaver, Ke Jian Liu
Molecular oxygen (O2) is essential to brain function and mechanisms necessary to regulate variations in delivery or utilization of O2 are crucial to support normal brain homeostasis, physiology and energy metabolism. Any imbalance in cerebral tissue partial pressure of O2 (pO2) levels may lead to pathophysiological complications including increased reactive O2 species generation leading to oxidative stress when tissue O2 level is too high or too low. Accordingly, the need for oximetry methods, which assess cerebral pO2in vivo and in real time, is imperative to understand the role of O2 in various metabolic and disease states, including the effects of treatment and therapy options...
January 2017: Medical Gas Research
https://www.readbyqxmd.com/read/28480032/neuroprotection-provided-by-isoflurane-pre-conditioning-and-post-conditioning
#4
REVIEW
Ming Jiang, Liang Sun, Dong-Xia Feng, Zheng-Quan Yu, Rong Gao, Yuan-Zhao Sun, Gang Chen
Isoflurane, a volatile and inhalational anesthetic, has been extensively used in perioperative period for several decades. A large amount of experimental studies have indicated that isoflurane exhibits neuroprotective properties when it is administrated before or after (pre-conditioning and post-conditioning) neurodegenerative diseases (e.g., hypoxic ischemia, stroke and trauma). Multiple mechanisms are involved in isoflurane induced neuroprotection, including activation of glycine and γ-aminobutyric acid receptors, antagonism of ionic channels and alteration of the function and activity of other cellular proteins...
January 2017: Medical Gas Research
https://www.readbyqxmd.com/read/28480031/carbon-monoxide-as-a-promising-molecule-to-promote-nerve-regeneration-after-traumatic-brain-injury
#5
REVIEW
Liang Qiao, Ning Zhang, Jun-Long Huang, Xiang-Qun Yang
Carbon monoxide (CO) is known as a toxic gas. Although there have been many studies on both toxic and protective effects of CO, most of these studies lack novelty, except for Eng H Lo team's study on the therapeutic effect of CO on brain injuries. In this commentary, we summarize the potential application value of CO in the treatment of some clinical diseases, especially its protective effect and nerve regeneration in brain injuries, hoping that our interest in CO could promote related clinical application studies...
January 2017: Medical Gas Research
https://www.readbyqxmd.com/read/28480030/drug-enhanced-carbon-monoxide-production-from-heme-by-cytochrome-p450-reductase
#6
Dragic Vukomanovic, Mona N Rahman, Zongchao Jia, Kanji Nakatsu
Carbon monoxide (CO) formed endogenously is considered to be cytoprotective, and the vast majority of CO formation is attributed to the degradation of heme by heme oxygenases-1 and -2 (HO-1, HO-2). Previously, we observed that brain microsomes containing HO-2 produced many-fold more CO in the presence of menadione and its congeners; herein we explored these observations further. We determined the effects of various drugs on CO production of rat brain microsomes and recombinant human cytochrome P450 reductase (CPR); CO was measured by gas chromatography with reductive detection...
January 2017: Medical Gas Research
https://www.readbyqxmd.com/read/28480029/a-porcine-ex-vivo-lung-perfusion-model-with-maximal-argon-exposure-to-attenuate-ischemia-reperfusion-injury
#7
An Martens, Sofie Ordies, Bart M Vanaudenaerde, Stijn E Verleden, Robin Vos, Geert M Verleden, Eric K Verbeken, Dirk E Van Raemdonck, Sandra Claes, Dominique Schols, Matthieu Chalopin, Ira Katz, Geraldine Farjot, Arne P Neyrinck
Argon (Ar) is a noble gas with known organoprotective effects in rodents and in vitro models. In a previous study we failed to find a postconditioning effect of Ar during ex vivo lung perfusion (EVLP) on warm-ischemic injury in a porcine model. In this study, we further investigated a prolonged exposure to Ar to decrease cold ischemia-reperfusion injury after lung transplantation in a porcine model with EVLP assessment. Domestic pigs (n = 6/group) were pre-conditioned for 6 hours with 21% O2 and 79% N2 (CONTR) or 79% Ar (ARG)...
January 2017: Medical Gas Research
https://www.readbyqxmd.com/read/28480028/a-comparison-of-renal-responses-to-sevoflurane-and-isoflurane-in-patients-undergoing-donor-nephrectomy-a-randomized-controlled-trial
#8
Lady Christine L Ong Sio, Richard Glenn C Dela Cruz, Alexander F Bautista
Sevoflurane and isoflurane are volatile halogenated ether widely used in anesthesia. Both have comparable potency and easy titratability but sevoflurane has lower pungency and results in faster patient recovery. Isoflurane, however, is more affordable. The nephrotoxicity of sevoflurane is undisputed but studies on isoflurane nephrotoxicity are lacking. The objective of this paper is to determine the overall nephrotoxicity profile of sevoflurane and isoflurane in donor nephrectomy patients using the renal function markers - nuclear glomerular filtration rate (GFR), serum creatinine, urine protein-to-creatinine ratio, proteinuria, and glucosuria...
January 2017: Medical Gas Research
https://www.readbyqxmd.com/read/28480027/effects-of-hydrogen-rich-saline-on-endotoxin-induced-uveitis
#9
Wei-Ming Yan, Lei Zhang, Tao Chen, Guan-Hua Zhao, Pan Long, Jing An, Zuo-Ming Zhang
The therapeutic effects of hydrogen-rich saline (HRS) have been reported for a wide range of diseases mainly via selectively reducing the amount of reactive oxygen species. Oxidative stress plays an important role in the pathogenesis of uveitis and endotoxin-induced uveitis (EIU). In this study, we investigated whether HRS can mitigate EIU in rats. Sprague-Dawley rats were randomly divided into Norm group, Model group, HRS group, dexamethasone (DEX) group, and rats in the latter three groups were injected with equal amount of lipopolysaccharide (LPS) to induce EIU of different severities (by 1 mg/kg of LPS, or 1/8 mg/kg of LPS)...
January 2017: Medical Gas Research
https://www.readbyqxmd.com/read/28480026/exercise-training-provides-cardioprotection-by-activating-and-coupling-endothelial-nitric-oxide-synthase-via-a-%C3%AE-3-adrenergic-receptor-amp-activated-protein-kinase-signaling-pathway
#10
Larry A Barr, Jonathan P Lambert, Yuuki Shimizu, Lili A Barouch, Nawazish Naqvi, John W Calvert
Exercise training confers sustainable protection against ischemia/reperfusion injury. However, the mechanism by which this process occurs is not fully understood. Previously, it was shown that β3-adrenergic receptors (β3-ARs) play a critical role in regulating the activation of endothelial nitric oxide synthase (eNOS) in response to exercise and play a critical role in exercise-mediated cardioprotection. Intriguingly, a deficiency in β3-ARs led to increased myocardial injury following exercise training. The purpose of the current study was to determine mechanisms by which β3-ARs are linked to eNOS activation and to determine the mechanism responsible for the exacerbated ischemia/reperfusion injury displayed by β3-AR deficient (β3-AR KO) mice after exercise training...
January 2017: Medical Gas Research
https://www.readbyqxmd.com/read/28217298/for-the-pursuit-of-oxygen-and-carbon-dioxide-channels-in-mitochondria
#11
EDITORIAL
Shao-Hua Yang, Ran Liu
No abstract text is available yet for this article.
October 2016: Medical Gas Research
https://www.readbyqxmd.com/read/28217297/hyperbaric-oxygen-therapy-and-preconditioning-for-ischemic-and-hemorrhagic-stroke
#12
REVIEW
Sheng-Li Hu, Hua Feng, Guo-Hua Xi
To date, the therapeutic methods for ischemic and hemorrhagic stroke are still limited. The lack of oxygen supply is critical for brain injury following stroke. Hyperbaric oxygen (HBO), an approach through a process in which patients breathe in 100% pure oxygen at over 101 kPa, has been shown to facilitate oxygen delivery and increase oxygen supply. Hence, HBO possesses the potentials to produce beneficial effects on stroke. Actually, accumulated basic and clinical evidences have demonstrated that HBO therapy and preconditioning could induce neuroprotective functions via different mechanisms...
October 2016: Medical Gas Research
https://www.readbyqxmd.com/read/28217296/anti-inflammatory-signaling-the-point-of-convergence-for-medical-gases-in-neuroprotection-against-ischemic-stroke
#13
REVIEW
Pei-Ying Li, Xin Wang, R Anne Stetler, Jun Chen, Wei-Feng Yu
Recent studies suggest that a variety of medical gases confer neuroprotective effects against cerebral ischemia, extending function beyond their regular clinical applications. The mechanisms underlying ischemic neuroprotection afforded by medical gases have been intensively studied over the past two decades. A number of signaling pathways have been proposed, among which anti-inflammatory signaling has been proven to be critical. Pursuit of the role for anti-inflammatory signaling may shed new light on the translational application of medical gas-afforded neuroprotection...
October 2016: Medical Gas Research
https://www.readbyqxmd.com/read/28217295/anti-oxidative-aspect-of-inhaled-anesthetic-gases-against-acute-brain-injury
#14
REVIEW
Tuo Yang, Yang Sun, Feng Zhang
Acute brain injury is a critical and emergent condition in clinical settings, which needs to be addressed urgently. Commonly acute brain injuries include traumatic brain injury, ischemic and hemorrhagic strokes. Oxidative stress is a key contributor to the subsequent injuries and impedes the reparative process after acute brain injury; therefore, facilitating an anti-oxidative approach is important in the care of those diseases. Readiness to deliver and permeability to blood brain barrier are essential for the use of this purpose...
October 2016: Medical Gas Research
https://www.readbyqxmd.com/read/28217294/molecular-hydrogen-a-therapeutic-antioxidant-and-beyond
#15
REVIEW
Lei Huang
Molecular hydrogen (H2) medicine research has flourished since a landmark publication in Nature Medicine that revealed the antioxidant and cytoprotective effects of hydrogen gas in a focal stroke model. Emerging evidence has consistently demonstrated that molecular hydrogen is a promising therapeutic option for a variety of diseases and the underlying comprehensive mechanisms is beyond pure hydroxyl radicals scavenging. The non-toxicity at high concentrations and rapid cellular diffusion features of molecular hydrogen ensure the feasibility and readiness of its clinical translation to human patients...
October 2016: Medical Gas Research
https://www.readbyqxmd.com/read/28217293/application-of-hyperbaric-oxygen-in-liver-transplantation
#16
REVIEW
Hu Lv, Cui-Hong Han, Xue-Jun Sun, Wen-Wu Liu
In recent years, hyperbaric oxygen (HBO) has been used in the treatment of a lot of diseases such as decompression sickness, arterial gas embolism, carbon dioxide poisoning, soft tissue infection, refractory osteomyelitis, and problematic wound, but little is known about its application in liver transplantation. Although several studies have been conducted to investigate the protective effects of HBO on liver transplantation and liver preservation, there are still some controversies on this issue, especially its immunomodulatory effect...
October 2016: Medical Gas Research
https://www.readbyqxmd.com/read/28217292/oxygen-or-cooling-to-make-a-decision-after-acute-ischemia-stroke
#17
REVIEW
Wen-Cao Liu, Xin-Chun Jin
The presence of a salvageable penumbra, a region of ischemic brain tissue with sufficient energy for short-term survival, has been widely agreed as the premise for thrombolytic therapy with tissue plasminogen activator (tPA), which remains the only United States Food and Drug Administration (FDA) approved treatment for acute ischemia stroke. However, the use of tPA has been profoundly constrained due to its narrow therapeutic time window and the increased risk of potentially deadly hemorrhagic transformation (HT)...
October 2016: Medical Gas Research
https://www.readbyqxmd.com/read/28217291/paradigms-and-mechanisms-of-inhalational-anesthetics-mediated-neuroprotection-against-cerebral-ischemic-stroke
#18
REVIEW
Hailian Wang, Peiying Li, Na Xu, Ling Zhu, Mengfei Cai, Weifeng Yu, Yanqin Gao
Cerebral ischemic stroke is a leading cause of serious long-term disability and cognitive dysfunction. The high mortality and disability of cerebral ischemic stroke is urging the health providers, including anesthesiologists and other perioperative professioners, to seek effective protective strategies, which are extremely limited, especially for those perioperative patients. Intriguingly, several commonly used inhalational anesthetics are recently suggested to possess neuroprotective effects against cerebral ischemia...
October 2016: Medical Gas Research
https://www.readbyqxmd.com/read/28217290/neuroprotective-effect-of-hyperbaric-oxygen-therapy-in-a-juvenile-rat-model-of-repetitive-mild-traumatic-brain-injury
#19
Lei Huang, Andre Obenaus, Mary Hamer, John H Zhang
Repetitive mild traumatic brain injury (rmTBI) is an important medical concern for adolescent athletes that can lead to long-term disabilities. Multiple mild injuries may exacerbate tissue damage resulting in cumulative brain injury and poor functional recovery. In the present study, we investigated the increased brain vulnerability to rmTBI and the effect of hyperbaric oxygen treatment using a juvenile rat model of rmTBI. Two episodes of mild cortical controlled impact (3 days apart) were induced in juvenile rats...
October 2016: Medical Gas Research
https://www.readbyqxmd.com/read/28217289/peripheral-surgical-wounding-may-induce-cognitive-impairment-through-interlukin-6-dependent-mechanisms-in-aged-mice
#20
Yuanlin Dong, Zhipeng Xu, Lining Huang, Yiying Zhang, Zhongcong Xie
Post-operative cognitive dysfunction (POCD) is associated with morbidity, mortality and increased cost of medical care. However, the neuropathogenesis and targeted interventions of POCD remain largely to be determined. We have found that the peripheral surgical wounding induces an age-dependent Aβ accumulation, neuroinflammation and cognitive impairment in aged mice. Pro-inflammatory cytokine interlukin-6 (IL-6) has been reported to be associated with cognitive impairment in rodents and humans. However, the role of IL-6 in the neuropathogenesis of POCD is unknown...
October 2016: Medical Gas Research
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