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https://www.readbyqxmd.com/read/29775658/hydroxysafflor-yellow-a-protects-brain-microvascular-endothelial-cells-against-oxygen-glucose-deprivation-reoxygenation-injury-involvement-of-inhibiting-autophagy-via-class-i-pi3k-akt-mtor-signaling-pathway
#1
Guang Yang, Ning Wang, Sai Wang Seto, Dennis Chang, Huazheng Liang
The present study aimed to test whether Hydroxysafflor yellow A (HSYA) protects the brain microvascular endothelial cells (BMECs) injury induced by oxygen glucose deprivation/reoxygenation (OGD/R) via the PI3K/Akt/mTOR autophagy signaling pathway. Primary rat BMECs were cultured and identified by the expression of factor VIII-related antigen before being exposed to OGD/R to imitate ischemia/reperfusion (I/R) damage in vitro. The protective effect of HSYA was evaluated by assessing (1) cellular morphologic and ultrastructural changes; (2) cell viability and cytotoxicity; (3) transendothelial electrical resistance (TEER) of monolayer BMECs; (4) cell apoptosis; (5) fluorescence intensity of LC3B; (6) LC3 mRNA expression; (7) protein expressions of LC3, Beclin-1, Zonula occludens-1 (ZO-1), phospho-Akt (p-Akt), Akt, phospho-mTOR (p-mTOR) and mTOR...
May 15, 2018: Brain Research Bulletin
https://www.readbyqxmd.com/read/29775224/circular-rnas-are-differentially-expressed-in-liver-ischemia-reperfusion-injury-model
#2
Zhiqiang Ye, Qinglei Kong, Jianhua Han, Jingyi Deng, Miaolue Wu, Hong Deng
Liver ischemia/reperfusion (I/R) injury has high mortality due to the intense inflammatory process occurs in the liver. However, the pathological mechanism underlying I/R injury is still not clear. Recent works showed that circular RNAs play critical roles in many human diseases. In this study, the occurrence of liver I/R injury was validated by an analysis of the blood samples and hematoxylin-eosin (HE) staining of liver tissues. Total RNA was purified and followed by RNA-seq in the purpose of screening the circRNAs in significant differentially expression, which were validated by quantitative PCR...
May 18, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29774822/partial-nephrectomy-in-central-renal-tumors
#3
Sohrab Arora, Craig Rogers
Nephron-sparing surgery, especially through a minimally invasive approach, is increasingly being performed for incidentally detected renal masses with excellent outcomes. Tumors in central location remain a surgical challenge during nephron-sparing surgery. In this chapter, we discuss the minimally invasive management of these tumors, which include complex hilar tumors and endophytic central tumors, with a focus on surgical technique. The key to management of these tumors is to maintain good preoperative hydration, achieving adequate exposure of tumor, and the use of intraoperative ultrasound to plan the resection plane...
May 2018: Journal of Endourology
https://www.readbyqxmd.com/read/29774809/robotic-partial-nephrectomy-for-a-peripheral-renal-tumor
#4
Caleb A Cooper, Cheuk Fan Shum, Chandru P Sundaram
Partial nephrectomy (PN) is the preferred surgical treatment for T1 renal tumors whenever technically feasible. When properly performed, it allows preservation of nephron mass without compromising oncologic outcomes. This reduces the postoperative risk of renal insufficiency, which translates into better overall survival for the patients. PN can be technically challenging, because it requires the surgeon to complete the tasks of tumor excision, hemostasis and renorrhaphy, all within an ischemic time of preferably below 30 minutes...
May 2018: Journal of Endourology
https://www.readbyqxmd.com/read/29774638/loss-of-sirtuin-1-and-mitofusin-2-contributes-to-enhanced-ischemia-reperfusion-injury-in-aged-livers
#5
Sung Kook Chun, Sooyeon Lee, Joseph Flores-Toro, Rebecca Y U, Ming-Jim Yang, Kristina L Go, Thomas G Biel, Catherine E Miney, Schiley Pierre Louis, Brian K Law, Mary E Law, Elizabeth M Thomas, Kevin E Behrns, Christiaan Leeuwenburgh, Jae-Sung Kim
Ischemia/reperfusion (I/R) injury is a causative factor contributing to morbidity and mortality during liver resection and transplantation. Livers from elderly patients have a poorer recovery from these surgeries, indicating reduced reparative capacity with aging. Mechanisms underlying this age-mediated hypersensitivity to I/R injury remain poorly understood. Here, we investigated how sirtuin 1 (SIRT1) and mitofusin 2 (MFN2) are affected by I/R in aged livers. Young (3 months) and old (23-26 months) male C57/BL6 mice were subjected to hepatic I/R in vivo...
May 17, 2018: Aging Cell
https://www.readbyqxmd.com/read/29774564/mortality-in-sepsis-comparison-of-outcomes-between-patients-with-demand-ischemia-acute-myocardial-infarction-and-neither-demand-ischemia-nor-acute-myocardial-infarction
#6
Mahek Shah, Soumya Patnaik, Obiora Maludum, Brijesh Patel, Byomesh Tripathi, Manyoo Agarwal, Lohit Garg, Sahil Agrawal, Ulrich P Jorde, Matthew W Martinez
INTRODUCTION: Elevation in cardiac troponins is common among septic patients. We sought to explore outcomes among those admitted with demand ischemia(DI), acute myocardial infarction(AMI) and neither DI nor AMI in sepsis. METHODS: We analyzed data from the 2011-2014 National Inpatient Sample among patients admitted for sepsis. We compared outcomes among sepsis patients with i)DI versus AMI and ii)DI versus neither DI nor AMI using separate propensity matched cohorts...
May 18, 2018: Clinical Cardiology
https://www.readbyqxmd.com/read/29774488/the-effect-of-oxygen-in-sirt3-mediated-myocardial-protection-a-proof-of-concept-study-in-cultured-cardiomyoblasts
#7
Philipp Diehl, Daniel S Gaul, Jonas Sogl, Ulrike Flierl, Darren Henstridge, Juergen Pahla, Heiko Bugger, Maximilian Y Emmert, Frank Ruschitzka, Christoph Bode, Thomas F Lüscher, Martin Moser, Christian M Matter, Karlheinz Peter, Stephan Winnik
Sirtuin 3 is a nicotinamide adenine dinucleotide dependent mitochondrial deacetylase that governs mitochondrial metabolism and oxidative defense. The demise in myocardial function following myocardial ischemia has been associated with mitochondrial dysfunction. Sirt3 maintains myocardial contractile function and protects from cardiac hypertrophy. The role of Sirt3 in ischemia is controversial. Our objective was to understand, under what circumstances Sirt3 is protective in different facets of ischemia, using an in vitro proof-of-concept approach based on simulated ischemia in cultured cardiomyoblasts...
May 17, 2018: Journal of Thrombosis and Thrombolysis
https://www.readbyqxmd.com/read/29774449/cellular-and-subcellular-localization-of-endoplasmic-reticulum-chaperone-grp78-following-transient-focal-cerebral-ischemia-in-rats
#8
Xuyan Jin, Dong Kyu Kim, Tae-Ryong Riew, Hong Lim Kim, Mun-Yong Lee
The 78-kDa glucose-regulated protein (GRP78), a chaperone protein located in the endoplasmic reticulum (ER), has been reported to have neuroprotective effects in the injured central nervous system. Our aim was to examine the expression profiles and subcellular distributions of GRP78 and its association with the neuroglial reaction in the rat striatum after transient, focal cerebral ischemia. In sham-operated rats, constitutive, specific immunoreactivity for GRP78 was almost exclusively localized to the rough ER of striatal neurons, with none in the resting, ramified microglia or astrocytes...
May 17, 2018: Neurochemical Research
https://www.readbyqxmd.com/read/29774174/outpatient-interventions-that-may-enhance-the-care-of-a-patient-with-co-existing-moyamoya-and-down-syndromes
#9
Anita Lwanga, Waldo Herrera, Katya Cruz Madrid, Antony Irungu
Moyamoya vasculopathy is a condition of chronic, progressive occlusion of the distal internal carotid arteries and the Circle of Willis. The resultant ischemia produces compensatory angiogenesis and the growth of a network of collateral blood vessels, which on angiography resemble a "puff of smoke" or "moyamoya" in Japanese. The objective of this case report is to describe the clinical course of a patient with Down and moyamoya syndromes and to enlighten clinicians about strategies that can be taken to enhance the care of similar patients...
March 16, 2018: Curēus
https://www.readbyqxmd.com/read/29774059/inflammation-in-stroke-the-role-of-cholinergic-purinergic-and-glutamatergic-signaling
#10
REVIEW
Abraham Martín, María Domercq, Carlos Matute
The inflammatory response is a major factor in stroke pathophysiology and contributes to secondary neuronal damage in both acute and chronic stages of the ischemic injury. Recent work in experimental cerebral ischemia has demonstrated the involvement of neurotransmitter signaling in the modulation of neuroinflammation. The present review discusses recent findings on the therapeutic potential and diagnostic perspectives of cholinergic, purinergic and glutamatergic receptors and transporters in experimental stroke...
2018: Therapeutic Advances in Neurological Disorders
https://www.readbyqxmd.com/read/29774051/alosetron-use-in-clinical-practice-significant-improvement-in-irritable-bowel-syndrome-symptoms-evaluated-using-the-us-food-and-drug-administration-composite-endpoint
#11
Brian E Lacy, Jean Paul Nicandro, Emil Chuang, David L Earnest
Background: Alosetron is approved to treat women with severe IBS and diarrhea (IBS-D) who have failed standard therapy. In our study, we aimed to evaluate alosetron efficacy using new US Food and Drug Administration (FDA) endpoints and utilization in clinical practice. Methods: This prospective, open-label, multicenter, observational 12-week study evaluated women with severe IBS-D enrolled in the alosetron prescribing program. The coprimary FDA endpoints were changes from baseline in stool consistency and abdominal pain severity...
2018: Therapeutic Advances in Gastroenterology
https://www.readbyqxmd.com/read/29774032/protein-o-glcnac-modification-increases-in-white-blood-cells-after-a-single-bout-of-physical-exercise
#12
Tamás Nagy, Emese Kátai, Viktória Fisi, Tamás Tibor Takács, Antal Stréda, István Wittmann, Attila Miseta
Background: Protein O-linked N -acetylglucosamine (O-GlcNAc) is a dynamic posttranslational modification influencing the function of many intracellular proteins. Recently it was revealed that O-GlcNAc regulation is modified under various stress states, including ischemia and oxidative stress. Aside from a few contradictory studies based on animal models, the effect of exercise on O-GlcNAc is unexplored. Purpose: To evaluate O-GlcNAc levels in white blood cells (WBC) of human volunteers following physical exercise...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29773995/hypoxia-reoxygenation-of-rat-renal-arteries-impairs-vasorelaxation-via-modulation-of-endothelium-independent-sgc-cgmp-pkg-signaling
#13
Diana Braun, Christa Zollbrecht, Stefanie Dietze, Rudolf Schubert, Stefan Golz, Holger Summer, Pontus B Persson, Mattias Carlström, Marion Ludwig, Andreas Patzak
Ischemia/reperfusion injury holds a key position in many pathological conditions such as acute kidney injury and in the transition to chronic stages of renal damage. We hypothesized that besides a reported disproportional activation of vasoconstrictor response, hypoxia/reoxygenation (H/R) adversely affects endothelial dilatory systems and impairs relaxation in renal arteries. Rat renal interlobar arteries were studied under isometric conditions. Hypoxia was induced by application of 95% N2 , 5% CO2 for 60 min to the bath solution, followed by a 10 min period of reoxygenation (95% O2 , 5% CO2 )...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29773952/remote-ischemic-preconditioning-in-myocardial-protection-in-hemodialysis-patients
#14
Marcelo R Bacci, Livia Y Vasconcelos, Neif Murad, Antonio Carlos P Chagas, Ana Carolina Capuano, Beatriz Ca Alves, Edimar C Pereira, Ligia A Azzalis, Virginia Bc Junqueira, Fernando LA Fonseca
Background: Remote ischemic preconditioning (RIPC) is a procedure that generates a brief period of ischemia followed by reperfusion. The role of RIPC in protecting myocardial ischemia during hemodialysis is not yet established. The aim of the study was to evaluate RIPC myocardial protection as evaluated by ultrasensitive I troponin in hemodialysis outpatients. Patients and methods: A double-blind randomized trial with two groups: intervention submitted to RIPC and control group without RIPC...
2018: International Journal of General Medicine
https://www.readbyqxmd.com/read/29773782/diagnosis-incidence-predictors-and-management-of-postreperfusion-syndrome-in-pediatric-deceased-donor-liver-transplantation-a-single-center-study
#15
Liang Zhang, Ming Tian, Fushan Xue, Zhijun Zhu
BACKGROUND Postreperfusion syndrome (PRS) is a dreadful and well-documented complication in adult liver transplantation (LT). However, information regarding PRS in pediatric LT is still scarce. We aimed to identify the incidence, risk factors and associated outcomes of pediatric LT in a single-center study. MATERIAL AND METHODS The medical records of 75 consecutive pediatric patients who underwent deceased donor liver transplantation (DDLT) from July 2015 to October 2017 were retrospectively reviewed. PRS was determined according to the Peking criteria when significant arrhythmia or refractory hypotension occurred following revascularization of the liver graft...
May 18, 2018: Annals of Transplantation: Quarterly of the Polish Transplantation Society
https://www.readbyqxmd.com/read/29773759/neutrophil-lymphocyte-ratio-and-creatinine-reduction-ratio-predict-good-early-graft-function-among-adult-cadaveric-donor-renal-transplant-recipients-single-institution-series
#16
Piotr Hogendorf, Anna Suska, Aleksander Skulimowski, Joanna Rut, Monika Grochowska, Aleksandra Wencel, Filip Dziwisz, Michał Nowicki, Dariusz Szymański, Grażyna Poznańska, Adam Durczyński, Janusz Strzelczyk
Background Delayed graft function (DGF) is a common complication following kidney transplantation and is associated with ischemia-reperfusion injury (IRI). Lymphocytes contribute to the pathogenesis of IRI and ischemia-reperfusion related delayed graft function Materials and Methods 135 Caucasian patients received a kidney graft from deceased heart-beating organ donors. We divided patients into 2 groups- patients with the eGFR>=30 on the 21st day post-transplantation (n=36) and patients with the eGFR<30 on the 21st day post-transplantation (n=99) to assess kidney graft function...
April 30, 2018: Polski Przeglad Chirurgiczny
https://www.readbyqxmd.com/read/29773381/cd44-targeted-hyaluronic-acid-curcumin-prodrug-protects-renal-tubular-epithelial-cell-survival-from-oxidative-stress-damage
#17
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/29773299/diffusion-mri-in-acute-nervous-system-injury
#18
Matthew D Budde, Nathan P Skinner
Diffusion weighted magnetic resonance imaging (DWI) and related techniques such as diffusion tensor imaging (DTI) are uniquely sensitive to the microstructure of the brain and spinal cord. In the acute aftermath of nervous system injury, for example, DWI reveals changes caused by injury that remains invisible on other MRI contrasts such as T2 -weighted imaging. This ability has led to a demonstrated clinical utility in cerebral ischemia. However, despite strong promise in preclinical models and research settings, DWI has not been as readily adopted for other acute injuries such as traumatic spinal cord, brain, or peripheral nerve injury...
April 30, 2018: Journal of Magnetic Resonance
https://www.readbyqxmd.com/read/29772576/wake-up-stroke-versus-stroke-with-known-onset-time-clinical-and-multimodality-ct-imaging-characteristics
#19
Jan W Dankbaar, Henri P Bienfait, Coen van den Berg, Edwin Bennink, Alexander D Horsch, Tom van Seeters, Irene C van der Schaaf, L Jaap Kappelle, Birgitta K Velthuis
BACKGROUND: Current guidelines for the treatment of acute ischemic stroke are mainly based on the time between symptom onset and initiation of treatment. This time is unknown in patients with wake-up stroke (WUS). We investigated clinical and multimodality CT imaging characteristics on admission in patients with WUS and in patients with a stroke with a known onset time. METHODS: All patients were selected from a large prospective cohort study (Dutch acute stroke study)...
May 17, 2018: Cerebrovascular Diseases
https://www.readbyqxmd.com/read/29772556/perinatal-brain-injury-mechanisms-and-therapeutic-approaches
#20
Joanne O Davidson, Justin M Dean, Mhoyra Fraser, Guido Wassink, Ted C Andelius, Simerdeep K Dhillon, Laura Bennet, Alistair Jan Gunn
Brain damage resulting from perinatal hypoxia-ischemia evolves slowly over time. While a small number of brain cells may die during a sufficiently profound period of hypoxia-ischemia, many will show initial recovery during a "latent" phase characterized by actively suppressed neural metabolism and activity. Critically, this transient recovery may be followed after ~6 hours by a phase of secondary deterioration, with delayed seizures, failure of mitochondrial function, cytotoxic edema, and bulk cell death over ~72 hours...
June 1, 2018: Frontiers in Bioscience (Landmark Edition)
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