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ischemic injury

Zhihui Lu, Nana Song, Bo Shen, XiaLian Xu, Yi Fang, Yiqin Shi, Yichun Ning, Jiachang Hu, Yan Dai, Xiaoqiang Ding, Jianzhou Zou, Jie Teng
BACKGROUND: The hepatocyte growth factor (HGF) target pathway plays pivotal renoprotective roles after acute kidney injury (AKI). Syndecan-1 serves as the co-receptor for HGF. Shedding of syndecan-1 is involved in various pathological processes. Thus, we hypothesized that IRI induced syndecan-1 shedding and inhibiting syndecan-1 shedding would protect against kidney injury by potentiating activation of the HGF receptor c-Met. METHODS: Expression of syndecan-1 and its sheddases were observed in kidneys of sham and I/R mice...
March 20, 2018: Transplantation
Shelly A Cruz, Zhaohong Qin, Alexandre F R Stewart, Hsiao-Huei Chen
Ischemic brain injury triggers neuronal cell death by apoptosis via caspase activation and by necroptosis through activation of the receptor-interacting protein kinases (RIPK) associated with the tumor necrosis factor-alpha (TNF-α)/death receptor. Recent evidence shows RIPK inhibitors are neuroprotective and alleviate ischemic brain injury in a number of animal models, however, most have not yet undergone clinical trials and safety in humans remains in question. Dabrafenib, originally identified as a B-raf inhibitor that is currently used to treat melanoma, was later revealed to be a potent RIPK3 inhibitor at micromolar concentrations...
February 2018: Neural Regeneration Research
Hao Xu, Xiao-Peng Mei, Li-Xian Xu
In recent years, with continuous research efforts targeted at studying the effects of pre- and after-treatment of inhaled anesthetics, significant progress has been made regarding the common clinical use of low concentrations of inhaled sevoflurane and its effect on induced central ischemia tolerance by pre- and post-treatment. In this study, we collected, analyzed, classified, and summarized recent literature regarding the effect of sevoflurane on central ischemia tolerance and its related mechanisms. In addition, we provide a theoretical basis for the clinical application of sevoflurane to protect the central nervous system and other important organs against ischemic injury...
February 2018: Journal of Dental Anesthesia and Pain Medicine
Yue Lu, Xiang-Sheng Zhang, Zi-Huan Zhang, Xiao-Ming Zhou, Yong-Yue Gao, Guang-Jie Liu, Han Wang, Ling-Yun Wu, Wei Li, Chun-Hua Hang
BACKGROUND: Peroxiredoxin (Prx) protein family have been reported as important damage-associated molecular patterns (DAMPs) in ischemic stroke. Since peroxiredoxin 2 (Prx2) is the third most abundant protein in erythrocytes and the second most protein in the cerebrospinal fluid in traumatic brain injury and subarachnoid hemorrhage (SAH) patients, we assessed the role of extracellular Prx2 in the context of SAH. METHODS: We introduced a co-culture system of primary neurons and microglia...
March 19, 2018: Journal of Neuroinflammation
Pingping Xia, Yundan Pan, Fan Zhang, Na Wang, E Wang, Qulian Guo, Zhi Ye
BACKGROUND/AIMS: Recent researches highlighted the protective potential of pioglitazone, a PPAR-γ agonist, in the progression of cerebral ischemia-reperfusion injury. However, there has been no study on the application of pioglitazone in treating ischemic stroke through mechanisms involving pyroptosis. METHODS: The cerebral injury was established by middle cerebral artery occlusion (MCAO). in vitro ischemia in primary cultured astrocytes was induced by the oxygen-glucose deprivation (OGD)...
March 13, 2018: Cellular Physiology and Biochemistry
Horng-Ruey Chua, Weng-Kin Wong, Venetia Huiling Ong, Dipika Agrawal, Anantharaman Vathsala, Hui-Ming Tay, Amartya Mukhopadhyay
PURPOSE: To evaluate 1-year mortality in patients with septic acute kidney injury (AKI) and to determine association between initial AKI recovery patterns ( reversal within 5 days, beyond 5 days but recovery, or nonrecovery) and chronic kidney disease (CKD) progression. METHODS: Prospective observational study, with retrospective evaluation of initial nonconsenters, of critically ill patients with septic AKI. RESULTS: We studied 207 patients (age, mean [SD]: 64 [16] years, 39% males), of which 56 (27%), 18 (9%), and 9 (4%) died in intensive care unit (ICU), post-ICU in hospital, and posthospitalization, respectively...
January 1, 2018: Journal of Intensive Care Medicine
Nikolaos G Frangogiannis
Inflammation plays a crucial role in cardiac repair, but may also extend ischemic injury and contribute to post-infarction remodeling. This review manuscript discusses recent advances in our understanding of the cell biology of the post-infarction inflammatory response. Recently published studies demonstrated that the functional repertoire of inflammatory and reparative cells may extend beyond the roles suggested by traditional teachings. Neutrophils may play an important role in cardiac repair by driving macrophages toward a reparative phenotype...
February 2018: Current Opinion in Physiology
Le Kang, Mingsan Miao, Ming Bai, Shuo Tian
Objective: To study the protective effect of total flavonoid in rabdosia rubescens on BIT model by brain ischemic tolerance (hereinafter BIT) model of mice. Method: BIT model is used to block bilateral common carotid arteries and to copy BIT model of mice. After 10 min of transient ischemia for rats in preconditioning group, the mice in the nimodipine group and naoluotong capsule group were given the total flavonoid in rabdosia rubescens (300 mg/kg, 150 mg/kg, 75 mg/kg) for gavage, sham operation group, ischemia/reperfusion injury (hereinafter IRI) group and BIT group were fed with the same volume of 0...
December 2017: Saudi Journal of Biological Sciences
Pierpaolo Cerullo, Paola Brancaccio, Serenella Anzilotti, Antonio Vinciguerra, Ornella Cuomo, Ferdinando Fiorino, Beatrice Severino, Paola Di Vaio, Gianfranco Di Renzo, Lucio Annunziato, Giuseppe Pignataro
Hypoxic-ischemic encephalopathy (HI) accounts for the majority of developmental, motor and cognitive deficits in children, leading to life-long neurological impairments. Since the plasmamembrane sodium/calcium exchanger (NCX) plays a fundamental role in maintaining ionic homeostasis during adult brain ischemia, in the present work we aimed to demonstrate (1)the involvement of NCX in the pathophysiology of neonatal HI and (2)a possible NCX-based pharmacological intervention. HI was induced in neonatal mice at postnatal day 7(P7) by unilateral cut of the right common carotid artery, followed by 60 min exposure to 8%O2 ...
March 15, 2018: Neuropharmacology
Ashish K Rehni, Vibha Shukla, Miguel A Perez-Pinzon, Kunjan R Dave
OBJECTIVES: Cerebral ischemia is a serious possible manifestation of diabetic vascular disease. Recurrent hypoglycemia (RH) enhances ischemic brain injury in insulin-treated diabetic (ITD) rats. In the present study, we determined the role of ischemic acidosis in enhanced ischemic brain damage in RH-exposed ITD rats. METHODS: Diabetic rats were treated with insulin and mild/moderate RH was induced for 5 days. Three sets of experiments were performed. The first set evaluated the effects of RH exposure on global cerebral ischemia-induced acidosis in ITD rats...
March 15, 2018: Neuropharmacology
Ying Song, Yun Bei, Yan Xiao, Hai-Da Tong, Xie-Qi Wu, Man-Ting Chen
To investigate the neuroprotective effect of edaravone was dependent on 5-lipoxygenase (5-LOX) signalling pathway or not. Middle cerebral artery occlusion (MCAO) and oxygen glucose deprivation (OGD) were established in SD rats and PC12 cells to mimic ischemic injury. In vivo, edaravone can significantly reduce neurological deficit scores, infarct volume and expression of 5-LOX. For in vitro experiment, reduced viability, cell death which occurred via necrosis and apoptosis were shown after OGD and even severer in OGD-reperfusion (OGD-R)...
March 15, 2018: Brain Research
Yangyang R Yu, Jennifer L Carpenter, Annalyn S DeMello, Sundeep G Keswani, Darrell L Cass, Oluyinka O Olutoye, Adam M Vogel, James A Thomas, Cole Burgman, Caraciolo J Fernandes, Timothy C Lee
PURPOSE: This study assesses the impact of extracorporeal membrane oxygenation (ECMO) associated morbidities on long-term quality of life (QOL) outcomes. METHODS: A single center, retrospective review of neonatal and pediatric non-cardiac ECMO survivors from 1/2005-7/2016 was performed. The 2012 Pediatric Quality of Life Inventory™ (PedsQL™) survey was administered. Clinical outcomes and QOL scores between groups were compared. RESULTS: Of 74 patients eligible, 64% (35 NICU, 12 PICU) completed the survey...
February 10, 2018: Journal of Pediatric Surgery
Yingying Qian, Xiangjiang Guo, Lin Che, Xuejing Guan, Bei Wu, Renhua Lu, Mingli Zhu, Huihua Pang, Yucheng Yan, Zhaohui Ni, Leyi Gu
BACKGROUND/AIMS: Klotho is a multifunctional protein expressed predominantly in kidney tubular epithelium. Here, we investigated the protective effects of Klotho on necroptosis in renal ischemic-reperfusion injury (IRI) and the role of oxidative stress in this process. METHODS: Mice were subjected to bilateral renal pedicle clamping. Mouse renal tubular epithelial (TCMK-1) cells were exposed to hypoxia/reoxygenation (H/R) or H2O2. Kidney samples from acute kidney injury (AKI) patients and controls were examined by immunofluorescence...
March 10, 2018: Cellular Physiology and Biochemistry
Xiaoqin Zhang, Yiping Zhang, Songqi Tang, Lishuang Yu, Youqin Zhao, Qiangqiang Ren, Xiaoqiang Huang, Wen Xu, Mingqing Huang, Jun Peng
ETHNOPHARMACOLOGICAL RELEVANCE: Pien-Tze-Huang (PZH) is a famous formula of traditional Chinese medicine used to treating stroke. However, the protective effect of PZH and its mechanisms in acute ischemic stroke remain to be explored. AIM OF THE STUDY: To investigate the protective effect of PZH on neuronal apoptosis in acute cerebral ischemic injury rats and explore its underlying mechanisms. MATERIALS AND METHODS: The effects of PZH were studied in acute ischemic stroke rats induced by transient middle cerebral artery occlusion, and the mitochondria-mediated apoptotic proteins including cytochrome C (Cyt C), Bax, Bcl-xl, P53, caspase-3, and caspase-9 as well as AKT and glycogen synthase kinase-3 beta (GSK-3β) were assessed...
March 14, 2018: Journal of Ethnopharmacology
Suzanne R Burstein, Hyun Jeong Kim, Jasmine A Fels, Liping Qian, Sheng Zhang, Ping Zhou, Anatoly A Starkov, Costantino Iadecola, Giovanni Manfredi
Recent evidence highlights a role for sex and hormonal status in regulating cellular responses to ischemic brain injury and neurodegeneration. A key pathological event in ischemic brain injury is the opening of a mitochondrial permeability transition pore (MPT) induced by excitotoxic calcium levels, which can trigger irreversible damage to mitochondria accompanied by the release of pro-apoptotic factors. However, sex differences in brain MPT modulation have not yet been explored. Here, we show that mitochondria isolated from female mouse forebrain have a lower calcium threshold for MPT than male mitochondria, and that this sex difference depends on the MPT regulator cyclophilin D (CypD)...
March 14, 2018: Biochimica et Biophysica Acta
Qiang Hao, Lei He, Jiming Zhou, Yuan Yuan, Xiaowen Ma, Zhijun Pang, Weina Li, Yingqi Zhang, Wei Zhang, Cun Zhang, Meng Li
BACKGROUND: Thymosin beta 4 (Tβ4) is a 43-amino-acid peptide with protective properties in myocardium injury. Previously, we produced a recombinant human dimeric Tβ4 (DTβ4). Here, the cardioprotective effects of DTβ4 and the molecular mechanisms underlying its enhanced activity were investigated. METHODS AND RESULTS: Echocardiography measurements showed that the cardioprotective effect of DTβ4 in myocardial infarction mice was significantly higher than that of wild-type Tβ4...
March 14, 2018: International Journal of Cardiology
Chen Fu, Yonggang Xiang, Xiaorong Li, Ailing Fu
For successful theranosis of brain diseases, limited access of therapeutic molecules across blood-brain barrier (BBB) needs be overcome in brain delivery. Currently, peptide derivatives of rabies virus glycoprotein (RVG) have been exploited as delivery ligands to transport nanocarriers across BBB and specifically into the brain. The targeting peptides usually conjugate to the nanocarrier surface, and the cargoes, including siRNA, miRNA, DNA, proteins and small molecular chemicals, are complexed or encapsulated in the nanocarriers...
June 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
Sheung-Fat Ko, Hon-Kan Yip, Chen-Chang Lee, Chia-Chang Lee, Chia-Hao Su, Chung-Cheng Huang, Shu-Hang Ng, Yi-Ling Chen, Min-Chi Chen
PURPOSE: This study aimed to investigate the potential of apparent diffusion coefficient (ADC) for monitoring adipose-derived mesenchymal stem cell (ADMSC) therapy of renal ischemic-reperfusion injury (IRI). PROCEDURES: After baseline magnetic resonance imaging (MRI), 36 Sprague-Dawley rats with bilateral renal IRI were divided equally as groups 1, 2, and 3 (non-treated rats) and groups 4, 5, and 6 (ADMSC-treated rats, with 2 million ADMSCs injected via the tail vein at 6 h after IRI)...
March 16, 2018: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
Anton G Kutikhin, Maxim Yu Sinitsky, Arseniy E Yuzhalin, Elena A Velikanova
The blood flow through vessels produces a tangential, or shear, stress sensed by their innermost layer (i.e., endothelium) and representing a major hemodynamic force. In humans, endothelial repair and blood vessel formation are mainly performed by circulating endothelial progenitor cells (EPCs) characterized by a considerable expression of vascular endothelial growth factor receptor 2 (VEGFR2), CD34, and CD133, pronounced tube formation activity in vitro, and strong reendothelialization or neovascularization capacity in vivo...
March 13, 2018: Journal of Molecular and Cellular Cardiology
Jonatan Barrera-Chimal, Gabriel R Estrela, Sebastian M Lechner, Sébastien Giraud, Soumaya El Moghrabi, Shiem Kaaki, Peter Kolkhof, Thierry Hauet, Frédéric Jaisser
Acute kidney injury induced by ischemia/reperfusion is an independent risk factor for chronic kidney disease. Macrophage recruitment plays an essential role during the injury and repair phases after an ischemic episode in the kidney. Here we show that the novel non-steroidal mineralocorticoid receptor antagonist finerenone or selective myeloid mineralocorticoid receptor ablation protects against subsequent chronic dysfunction and fibrosis induced by an episode of bilateral kidney ischemia/reperfusion in mice...
March 13, 2018: Kidney International
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