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https://www.readbyqxmd.com/read/29790387/crosstalk-between-connexin-32-and-mitochondrial-apoptotic-signaling-pathway-plays-a-pivotal-role-in-renal-ischemia-reperfusion-induced-acute-kidney-injury
#1
Chaojin Chen, Yao Weifeng, Wu Shan, Zhou Shaoli, Gu Yu, Ge Mian, Li Xiang, Guihua Chen, Joseph A Bellanti, Songguo Zheng, Dongdong Yuan, Ziqing Hei
AIMS: Perioperative acute kidney injury (AKI) resulting from renal ischemia reperfusion (IR) is not conducive to the postoperative surgical recovery. Our previous study demonstrated that reactive oxygen species (ROS) transmitted by gap junction (GJ) composed of connexin32 (Cx32) contributed to AKI. However, the precise pathophysiologic mechanisms were unknown. The present study focuses on the underlying mechanisms related to ROS transmitted by Cx32 responsible for AKI aggravation. RESULTS: In a set of vivo studies, renal IR was found to cause severe impairment in renal tissues with massive ROS generation, and occurred contemporaneously with activation of NF-κB/p53/PUMA-mediated mitochondrial apoptosis pathways...
May 23, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29782624/the-underlying-mechanisms-involved-in-the-protective-effects-of-ischemic-postconditioning
#2
Rong Xie, Jinquan Li, Heng Zhao
Cerebral ischemic postconditioning (PostC) refers to a series of brief ischemia and reperfusion (I/R) cycles applied at the onset of reperfusion following an ischemic event. PostC has been shown to have neuroprotective effects, and represents a promising clinical strategy against cerebral ischemia-reperfusion injury. Many studies have indicated that cerebral PostC can effectively reduce neural cell death, cerebral edema and infarct size, improve cerebral circulation, and relieve inflammation, apoptosis and oxidative stress...
2018: Conditioning medicine
https://www.readbyqxmd.com/read/29776812/preservation-with-%C3%AE-1-antitrypsin-improves-primary-graft-function-of-murine-lung-transplants
#3
Jessica Götzfried, Natalia F Smirnova, Carmela Morrone, Brice Korkmaz, Ali Önder Yildirim, Oliver Eickelberg, Dieter E Jenne
BACKGROUND: Vascular damage and primary graft dysfunction increase with prolonged preservation times of transplanted donor lungs. Hence, storage and conservation of donated lungs in protein-free, dextran-containing electrolyte solutions, like Perfadex, is limited to about 6 hours. We hypothesized that transplanted lungs are protected against neutrophil-mediated proteolytic damage by adding α1 -anti-trypsin (AAT), a highly abundant human plasma proteinase inhibitor, to Perfadex. METHODS: A realistic clinically oriented murine model of lung transplantation was used to simulate the ischemia-reperfusion process...
March 30, 2018: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/29773381/cd44-targeted-hyaluronic-acid-curcumin-prodrug-protects-renal-tubular-epithelial-cell-survival-from-oxidative-stress-damage
#4
Jing-Bo Hu, Shu-Juan Li, Xu-Qi Kang, Jing Qi, Jia-Hui Wu, Xiao-Juan Wang, Xiao-Ling Xu, Xiao-Ying Ying, Sai-Ping Jiang, Jian You, Yong-Zhong Du
Based on the abnormally increased expression of CD44 receptors on renal tubule epithelial cells during ischemia/reperfusion-induced acute kidney injury (AKI), we developed a hyaluronic acid-curcumin (HA-CUR) polymeric prodrug targeting to epithelial cells and then relieving oxidative stress damages. The water solubility of HA-CUR was significantly enhanced and approximately 27-fold higher than that of CUR. Cellular uptake test showed HA-CUR was preferably internalized by H2 O2 -pretreated tubular epithelial (HK-2) cells compared with free CUR benefiting from the specific binding between HA and CD44 receptors...
August 1, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29770854/german-contribution-to-development-and-innovations-in-the-management-of-acute-myocardial-infarction-and-cardiogenic-shock
#5
REVIEW
Hans-Josef Feistritzer, Steffen Desch, Suzanne de Waha, Alexander Jobs, Uwe Zeymer, Holger Thiele
Treatment of acute coronary syndromes has evolved over time leading to a significantly reduced mortality. Multiple major trials have been performed in Germany leading to new treatment strategies in acute coronary syndromes including cardiogenic shock. This review article will summarize major trials and their impact on guideline recommendations in acute myocardial infarction highlighting reperfusion strategies, antiplatelet regimens, prognosis assessment and also mechanical circulatory support in stable infarction patients and in cardiogenic shock...
May 16, 2018: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/29767265/knockdown-of-tnf%C3%A2-%C3%AE-alleviates-acute-lung-injury-in-rats-with-intestinal-ischemia-and-reperfusion-injury-by-upregulating-il%C3%A2-10-expression
#6
Zhen Yang, Xue-Rong Zhang, Qiong Zhao, Sheng-Lan Wang, Liu-Lin Xiong, Piao Zhang, Bing Yuan, Zi-Bing Zhang, Shu-Yuan Fan, Ting-Hua Wang, Yun-Hui Zhang
Intestinal ischemia and reperfusion (II/R) injury often triggers severe injury in remote organs, with the lungs being considered the main target. Excessive elevation of proinflammatory cytokines is a major contributor in the occurrence and development of II/R‑induced acute lung injury (ALI). Therefore, the present study aimed to investigate whether blocking tumor necrosis factor‑α (TNF‑α) expression could protect the lungs from injury following II/R, and to explore the possible underlying mechanism involving interleukin‑10 (IL‑10)...
May 14, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29766323/cgmp-at-the-centre-of-attention-emerging-strategies-for-activating-the-cardioprotective-pkg-pathway
#7
REVIEW
Min Park, Peter Sandner, Thomas Krieg
The nitric oxide (NO)-protein kinase G (PKG) pathway has been known for some time to be an important target for cardioprotection against ischaemia/reperfusion injury and heart failure. While many approaches for reducing infarct size in patients have failed in the past, the advent of novel drugs that modulate cGMP and its downstream targets shows very promising results in recent preclinical and clinical studies. Here, we review main aspects of the NO-PKG pathway in light of recent drug development and summarise potential cardioprotective strategies in which cGMP is the main player...
May 15, 2018: Basic Research in Cardiology
https://www.readbyqxmd.com/read/29761012/an-overview-of-protective-strategies-against-ischemia-reperfusion-injury-the-role-of-hyperbaric-oxygen-preconditioning
#8
Ciprian Hentia, Alex Rizzato, Enrico Camporesi, Zhongjin Yang, Danina M Muntean, Dorel Săndesc, Gerardo Bosco
Introduction: Ischemia/reperfusion (I/R) injury, such as myocardial infarction, stroke, and peripheral vascular disease, has been recognized as the most frequent causes of devastating disorders and death currently. Protective effect of various preconditioning stimuli, including hyperbaric oxygen (HBO), has been proposed in the management of I/R. Methods: In this study, we searched and reviewed up-to-date published papers to explore the pathophysiology of I/R injury and to understand the mechanisms underlying the protective effect of HBO as conditioning strategy...
May 2018: Brain and Behavior
https://www.readbyqxmd.com/read/29757901/revascularization-time-in-liver-transplantation-independent-prediction-of-inferior-short-and-long-term-outcomes-by-prolonged-graft-implantation
#9
Bettina M Buchholz, Undine A Gerlach, Vishnu V Chandrabalan, James Hodson, Bridget K Gunson, Hynek Mergental, Paolo Muiesan, John R Isaac, Keith J Roberts, Darius F Mirza, M Thamara Pr Perera
BACKGROUND: Strategies for successful transplantation are much needed in the era of organ shortage and there has been a resurgence of interest on the impact of revascularization time (RT) on outcomes in liver transplantation (LT). METHODS: All primary LT performed in Birmingham between 2009 and 2014 (n=678) with portal reperfusion first were stratified according to RT (<44 vs. ≥44 min) and graft quality (SLG, Donor risk index [DRI] <2.3 vs. MLG, DRI ≥2...
May 2, 2018: Transplantation
https://www.readbyqxmd.com/read/29751972/notch3-orchestrates-epithelial-and-inflammatory-responses-to-promote-acute-kidney-injury
#10
Panagiotis Kavvadas, Zela Keuylian, Niki Prakoura, Sandrine Placier, Aude Dorison, Christos E Chadjichristos, Jean-Claude Dussaule, Christos Chatziantoniou
Acute kidney injury is a major risk factor for subsequent chronic renal and/or cardiovascular complications. Previous studies have shown that Notch3 was de novo expressed in the injured renal epithelium in the early phases of chronic kidney disease. Here we examined whether Notch3 is involved in the inflammatory response and the epithelial cell damage that typifies ischemic kidneys using Notch3 knockout mice and mice with short-term activated Notch3 signaling (N3ICD) in renal epithelial cells. After ischemia/reperfusion, N3ICD mice showed exacerbated infiltration of inflammatory cells and severe tubular damage compared to control mice...
May 8, 2018: Kidney International
https://www.readbyqxmd.com/read/29748216/intrinsic-anti-inflammatory-properties-in-the-serum-of-two-species-of-deep-diving-seal
#11
Aranya Bagchi, Annabelle J Batten, Milton Levin, Kaitlin N Allen, Michael L Fitzgerald, Luis A Hückstädt, Daniel P Costa, Emmanuel S Buys, Allyson G Hindle
Weddell and elephant seals are deep diving mammals, which rely on lung collapse to limit nitrogen absorption and prevent decompression injury. Repeated collapse and re-expansion exposes the lungs to multiple stressors, including ischemia/reperfusion, alveolar shear stress, and inflammation. There is no evidence, however, that diving damages pulmonary function in these species. To investigate potential protective strategies in deep-diving seals, we examined the inflammatory response of seal whole blood exposed to lipopolysaccharide (LPS), a potent endotoxin...
May 10, 2018: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29745255/pannexin-1-channels-on-endothelial-cells-mediate-vascular-inflammation-during-lung-ischemia-reperfusion-injury
#12
Ashish K Sharma, Eric J Charles, Yunge Zhao, Adishesh K Narahari, Pranav K Baderdinni, Miranda E Good, Ulrike M Lorenz, Irving L Kron, Douglas A Bayliss, Kodi S Ravichandran, Brant E Isakson, Victor E Laubach
Ischemia-reperfusion injury (IRI), which involves inflammation, vascular permeability, and edema, remains a major challenge after lung transplantation. Pannexin 1 (Panx1) channels modulate cellular ATP release during inflammation. This study tests the hypothesis that endothelial Panx1 is a key mediator of vascular inflammation and edema after IR and that IRI can be blocked by Panx1 antagonism. A murine hilar ligation model of IRI was utilized whereby left lungs underwent 1 hour of ischemia and 2 hours of reperfusion...
May 10, 2018: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/29744594/nr4a1-aggravates-the-cardiac-microvascular-ischemia-reperfusion-injury-through-suppressing-fundc1-mediated-mitophagy-and-promoting-mff-required-mitochondrial-fission-by-ck2%C3%AE
#13
Hao Zhou, Jin Wang, Pingjun Zhu, Hong Zhu, Sam Toan, Shunying Hu, Jun Ren, Yundai Chen
Mitochondrial fission and mitophagy are considered key processes involved in the pathogenesis of cardiac microvascular ischemia reperfusion (IR) injury although the upstream regulatory mechanism for fission and mitophagy still remains unclear. Herein, we reported that NR4A1 was significantly upregulated following cardiac microvascular IR injury, and its level was positively correlated with microvascular collapse, endothelial cellular apoptosis and mitochondrial damage. However, NR4A1-knockout mice exhibited resistance against the acute microvascular injury and mitochondrial dysfunction compared with the wild-type mice...
May 9, 2018: Basic Research in Cardiology
https://www.readbyqxmd.com/read/29743926/6-gingerol-activates-pi3k-akt-and-inhibits-apoptosis-to-attenuate-myocardial-ischemia-reperfusion-injury
#14
Xiangwei Lv, Tongtong Xu, Qi Wu, Yao Zhou, Guidong Huang, Yongnan Xu, Guoqiang Zhong
6-Gingerol (6-G) is known to alleviate myocardial ischemia/reperfusion injury. However, the underlying molecular mechanisms of 6-G myocardial protection are not known. In this study, the protective effect of 6-G on ischemia/reperfusion (I/R) damage and whether such a mechanism was related to apoptosis inhibition and activation of phosphoinositide 3-kinases (PI3K)/serine/threonine kinase (Akt) signaling pathway were investigated. Rats were subjected to I/R in the presence or absence of 6-G and the changes of cardiac function, infarct size and histopathological changes, and the levels of cardiac troponin T, creatine kinase-MB, and myocardial apoptosis were examined...
2018: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29740385/refocusing-neuroprotection-in-cerebral-reperfusion-era-new-challenges-and-strategies
#15
REVIEW
Xiao-Yi Xiong, Liang Liu, Qing-Wu Yang
Pathophysiological processes of stroke have revealed that the damaged brain should be considered as an integral structure to be protected. However, promising neuroprotective drugs have failed when translated to clinical trials. In this review, we evaluated previous studies of neuroprotection and found that unsound patient selection and evaluation methods, single-target treatments, etc., without cerebral revascularization may be major reasons of failed neuroprotective strategies. Fortunately, this may be reversed by recent advances that provide increased revascularization with increased availability of endovascular procedures...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29737261/coronary-catheterization-laboratory-role-for-post-resuscitation-care-without-st-elevation-myocardial-infarction
#16
Kris Kumar, Kapildeo Lotun
Out of hospital cardiac arrest management of patients with non-ST myocardial infarction per current American Heart Association and European Resuscitation Council guidelines leave the decision in regard to early angiography up to the physician operators. Guidelines are clear on the positive impact of early intervention on survival and improvement on left ventricular function in patients presenting with cardiac arrest and ST elevation myocardial infarction on electrocardiogram. This review aims to analyze the data that current guidelines are based upon in regards to out of hospital cardiac arrest with electrocardiogram findings of non-ST elevation myocardial infarction as well as other clinical trials that support early angiography and reperfusion strategies as well as future studies that are in trial to study the role of the coronary catheterization laboratory in cardiac arrest...
May 7, 2018: Current Cardiology Reviews
https://www.readbyqxmd.com/read/29734780/cpkc%C3%AE-modulated-sequential-reactivation-of-mtor-inhibited-autophagic-flux-in-neurons-exposed-to-oxygen-glucose-deprivation-reperfusion
#17
Rongrong Hua, Song Han, Nan Zhang, Qingqing Dai, Ting Liu, Junfa Li
We have reported that conventional protein kinase C&gamma; (cPKC&gamma;)-modulated neuron-specific autophagy improved the neurological outcome of mice following ischemic stroke through the Akt-mechanistic target of rapamycin (mTOR) pathway. However, its detailed molecular mechanism remains unclear. In this study, primary cortical neurons from postnatal one-day-old C57BL/6J cPKC&gamma; wild-type ( cPKC&gamma; +/+ ) and knockout ( cPKC&gamma; &minus;/&minus; ) mice suffering oxygen glucose deprivation/reperfusion (OGD/R) were used to simulate ischemia/reperfusion injury in vitro...
May 6, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29734176/mitofusin-2-exerts-a-protective-role-in-ischemia-reperfusion-injury-through-increasing-autophagy
#18
Cheng Peng, Wei Rao, Lei Zhang, Fan Gao, Hao Hui, Kai Wang, Shuhui Dai, Yuefan Yang, Peng Luo, Yihui Ma, Wenke Ma, Xinguang Yu, Zhou Fei
BACKGROUND/AIMS: Autophagy is essential for maintaining cellular homeostasis and the survival of terminally differentiated cells as neurons. In this study, we aim to investigate whether mitofusin 2, a mitochondrial fusion protein, mediates autophagy in cerebral ischemia/reperfusion (I/R) injury. METHODS: Primary cultured neurons were treated with oxygen-glucose deprivation/reperfusion to mimic cerebral I/R injury in vitro. Autophagosomes were visualized upon TEM...
May 3, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29733120/thymoquinone-protects-rat-liver-after-partial-hepatectomy-under-ischemia-reperfusion-through-oxidative-stress-and-endoplasmic-reticulum-stress-prevention
#19
Ahlem Bouhlel, Mohamed Bejaoui, Ismail Ben Mosbah, Najet Hadj Abdallah, Catherine Ribault, Roselyne Viel, Hassen Hentati, Anne Corlu, Hassen Ben Abdennebi
Ischemia reperfusion (I/R) is associated with liver injury and impaired regeneration during partial hepatectomy (PH). The aim of this study was to investigate the effect of thymoquinone (TQ), the active compound of essential oil obtained from Nigella sativa seeds, on rat liver after PH. Male Wistar rats were equally divided into four groups (n=6) receiving an oral administration of either vehicle solution (Sham and PH groups) or TQ at 30 mg/kg (TQ and TQ+PH groups) for ten consecutive days. Then, rats underwent PH (70%) with 60 min of ischemia followed by 24h of reperfusion (PH and TQ+PH groups)...
May 7, 2018: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29729264/dexmedetomidine-attenuates-renal-fibrosis-via-%C3%AE-2-adrenergic-receptor-dependent-inhibition-of-cellular-senescence-after-renal-ischemia-reperfusion
#20
Qijian Li, Chaojin Chen, Xi Chen, Mingming Han, Juan Li
BACKGROUND: Renal ischemia/reperfusion (IR) can induce acute kidney injury (AKI), which often progresses to chronic kidney disease (CKD). Dexmedetomidine (Dex), a highly selective α2 adrenergic receptor (α2-AR) agonist, protects against acute renal IR-induced injury. However, the effects of Dex on the transition of AKI to CKD remain unclear. Therefore, we investigated the mechanisms of Dex on renal fibrosis. METHODS: Adult male C57BL/6 mice were pretreated with Dex, a specific α2A-adrenergic receptor (AR) blocker (BRL-44408), or a cell senescence inhibitor (rapamycin) in a surgical bilateral renal IR model...
May 2, 2018: Life Sciences
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