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https://www.readbyqxmd.com/read/29315760/protective-influence-of-rosiglitazone-against-testicular-ischaemia-reperfusion-injury-in-rats
#1
N Zheng, H Shao, D Wu, D Shen, X Lin
Testicular torsion is a urology urgent disease which causes testicular injury and potential sterility. In this study, we explored the protective influence of rosiglitazone on testicular ischaemia-reperfusion damage. There were 28 male Sprague Dawley rats in total, which were assigned randomly to four groups. Group A was blank control one; group B was testicular injury one; group C was rosiglitazone one; group D was rosiglitazone antagonist one. The testicles were counter-rotated after 2 hr and then underwent orchiectomy 24 hr later...
January 9, 2018: Andrologia
https://www.readbyqxmd.com/read/29314656/mammalian-target-of-rapamycin-inhibition-attenuates-myocardial-ischaemia-reperfusion-injury-in-hypertrophic-heart
#2
Lei-Lei Ma, Xin Ma, Fei-Juan Kong, Jun-Jie Guo, Hong-Tao Shi, Jian-Bing Zhu, Yun-Zeng Zou, Jun-Bo Ge
Pathological cardiac hypertrophy aggravated myocardial infarction and is causally related to autophagy dysfunction and increased oxidative stress. Rapamycin is an inhibitor of serine/threonine kinase mammalian target of rapamycin (mTOR) involved in the regulation of autophagy as well as oxidative/nitrative stress. Here, we demonstrated that rapamycin ameliorates myocardial ischaemia reperfusion injury by rescuing the defective cytoprotective mechanisms in hypertrophic heart. Our results showed that chronic rapamycin treatment markedly reduced the phosphorylated mTOR and ribosomal protein S6 expression, but not Akt in both normal and aortic-banded mice...
January 4, 2018: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29300009/structure-of-the-complement-c5a-receptor-bound-to-the-extra-helical-antagonist-ndt9513727
#3
Nathan Robertson, Mathieu Rappas, Andrew S Doré, Jason Brown, Giovanni Bottegoni, Markus Koglin, Julie Cansfield, Ali Jazayeri, Robert M Cooke, Fiona H Marshall
The complement system is a crucial component of the host response to infection and tissue damage. Activation of the complement cascade generates anaphylatoxins including C5a and C3a. C5a exerts a pro-inflammatory effect via the G-protein-coupled receptor C5a anaphylatoxin chemotactic receptor 1 (C5aR1, also known as CD88) that is expressed on cells of myeloid origin. Inhibitors of the complement system have long been of interest as potential drugs for the treatment of diseases such as sepsis, rheumatoid arthritis, Crohn's disease and ischaemia-reperfusion injuries...
January 3, 2018: Nature
https://www.readbyqxmd.com/read/29297363/critical-illness-and-flat-batteries
#4
REVIEW
Mervyn Singer
An exaggerated, dysregulated host response to insults such as infection (i.e. sepsis), trauma and ischaemia-reperfusion injury can result in multiple organ dysfunction and death. While the focus of research in this area has largely centred on inflammation and immunity, a crucial missing link is the precise identification of mechanisms at the organ level that cause this physiological-biochemical failure. Any hypothesis must reconcile this functional organ failure with minimal signs of cell death, availability of oxygen, and (often) minimal early local inflammatory cell infiltrate...
December 28, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/29290518/enteral-nutrition-improves-clinical-outcome-and-reduces-costs-of-acute-mesenteric-ischaemia-after-recanalisation-in-the-intensive-care-unit
#5
Shuofei Yang, Jianming Guo, Qihong Ni, Jiaquan Chen, Xiangjiang Guo, Guanhua Xue, Meng Ye, Lan Zhang
BACKGROUND: Little data evaluate the enteral nutrition (EN) for patients with acute mesenteric ischaemia (AMI) in the intensive care unit (ICU). This study assessed the outcomes of EN for recanalised AMI patients in the ICU. METHODS: In this retrospective study, 183 AMI patients with mesenteric recanalisation admitted to two surgical ICUs were included. Patients were divided into EN (EN within first week, n = 95) and total parenteral nutrition (TPN) group (TPN in 1st week, n = 88)...
December 20, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/29290476/feasibility-study-of-a-novel-thoraco-abdominal-aortic-hybrid-device-spider-graft-in-a-translational-pig-model
#6
REVIEW
Eike S Debus, Tilo Kölbel, Anna Duprée, Günter Daum, Harleen L Sandhu, Daniel Manzoni, Sabine H Wipper
BACKGROUND: The hybrid SPIDER-graft consists of a proximal descending aortic stent graft and a conventional six branched Dacron graft for open abdominal aortic repair. Technical feasibility with regard to avoiding thoracotomy and extracorporeal circulation (ECC) during thoraco-abdominal aortic hybrid repair and peri-procedural safety of this novel device are unknown. MATERIAL AND METHODS: This was a feasibility and safety study in domestic pigs (75-85 kg). The abdominal aorta including iliac bifurcation, left renal artery, and visceral arteries were exposed via retroperitoneal access...
December 28, 2017: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/29285123/an-in-vitro-endothelial-cell-protective-effect-of-secretory-leukocyte-protease-inhibitor-against-simulated-ischaemia-reperfusion-injury
#7
Nitirut Nernpermpisooth, Eakkapote Prompunt, Sarawut Kumphune
Endothelial dysfunction is an essential deleterious modulator of ischaemia/reperfusion (I/R) injury. Secretory leukocyte protease inhibitor (SLPI) has demonstrated myocardial protection in cardiac transplantation; however, the effect of SLPI in endothelial I/R injury remains unexplored. In the present study, the effect of recombinant human SLPI (rhSLPI) treatment against endothelial cells (ECs) subjected to simulated I/R injury and the effect of treatment at different time points were determined. Human umbilical vein ECs (HUVECs) were subjected to normoxic or simulated I/R (sI/R) conditions, and rhSLPI at concentrations of 1, 10, 100 and 1,000 ng/ml was added to the cells prior to ischaemia, during ischaemia or at the onset of reperfusion...
December 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29272987/the-practicalities-of-establishing-a-porcine-isolated-heart-model
#8
Warren Pavey, Anthea Raisis, Ben Dunne, Els Van Laeken, Charles Jenkinson, Viji Vincent, Peter Baird, Stuart Prince, Kwok M Ho, Christopher Merry, Ian Gilfillan
BACKGROUND: The isolated heart apparatus is over 100 years old, but remains a useful research tool today. While designs of many large animal systems have been described in the literature, trouble-shooting and refining such a model to yield a stable, workable system has not been previously described. This paper outlines the issues, in tabular form, that our group encountered in developing our own porcine isolated heart rig with the aim of assisting other workers in the field planning similar work...
December 1, 2017: Perfusion
https://www.readbyqxmd.com/read/29259024/inclusion-criteria-update-for-the-rat-intraluminal-ischaemic-model-for-preclinical-studies
#9
Héctor Fernández-Susavila, Ramón Iglesias-Rey, Antonio Dopico-López, María Pérez-Mato, Tomás Sobrino, José Castillo, Francisco Campos
Proper occlusion of the medial cerebral artery, as determined by laser Doppler monitoring, during cerebral ischaemia in rat models is an important inclusion criterion in experimental studies. However, successful occlusion of the artery does not always guarantee a reproducible infarct volume, which is crucial for validating the efficacy of new protective drugs. In a rat intraluminal ischaemic model, laser Doppler monitoring alone was compared with laser Doppler monitoring in combination with magnetic resonance angiography (MRA) and diffusion-weighted imaging (DWI)...
December 19, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/29240054/-endovascular-interventions-in-treatment-of-patients-with-acute-impairment-of-mesenteric-blood-circulation
#10
A I Khripun, A V Salikov, A B Mironkov, A D Priamikov
The authors share herein their experience of treating a total of eight patients with acute impairment of mesenteric blood circulation, describing both technical and instrumental peculiarities of interventions on the superior mesenteric artery. Technical success defined as restoration of the main blood flow through the superior mesenteric artery was achieved in seven (87.5%) patients. Of these, two (25%) patients required laparotomy and intestinal resection, with the scope of resection being significantly reduced in one case after endovascular thrombectomy...
2017: Angiologii︠a︡ i Sosudistai︠a︡ Khirurgii︠a︡, Angiology and Vascular Surgery
https://www.readbyqxmd.com/read/29237256/microrna-206-protects-against-myocardial-ischaemia-reperfusion-injury-in-rats-by-targeting-gadd45%C3%AE
#11
Changlin Zhai, Qang Qian, Guanmin Tang, Bingjiang Han, Huilin Hu, Dong Yin, Haihua Pan, Song Zhang
MicroRNAs are widely involved in the pathogenesis of cardiovascular diseases through regulating gene expression via translational inhibition or degradation of their target mRNAs. Recent studies have indicated a critical role of microRNA-206 in myocardial ischaemia-reperfusion (I/R) injury. However, the function of miR-206 in myocardial I/R injury is currently unclear. The present study was aimed to identify the specific role of miR-206 in myocardial I/R injury and explore the underlying molecular mechanism...
December 14, 2017: Molecules and Cells
https://www.readbyqxmd.com/read/29229321/the-role-of-aspirin-heparin-and-other-interventions-in-the-prevention-and-treatment-of-fetal-growth-restriction
#12
REVIEW
Katie M Groom, Anna L David
Fetal growth restriction and related placental pathologies such as preeclampsia, stillbirth, and placental abruption are believed to arise in early pregnancy when inadequate remodeling of the maternal spiral arteries leads to persistent high-resistance and low-flow uteroplacental circulation. The consequent placental ischaemia, reperfusion injury, and oxidative stress are associated with an imbalance in angiogenic/antiangiogenic factors. Many interventions have centered on the prevention and/or treatment of preeclampsia with results pertaining to fetal growth restriction and small-for-gestational-age pregnancy often included as secondary outcomes because of the common pathophysiology...
December 8, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29224017/the-il-2-anti-il-2-complex-attenuates-cardiac-ischaemia-reperfusion-injury-through-expansion-of-regulatory-t-cells
#13
Junhui Xiao, Kunwu Yu, Ming Li, Chuanyin Xiong, Yuzhen Wei, Qiutang Zeng
BACKGROUND/AIMS: Regulatory T cells (Tregs) can suppress immunologic damage in myocardial ischaemia/reperfusion injury (MIRI), however, the isolation and ex vivo expansion of these cells for clinical application remains challenging. Here, we investigated whether the IL-2/anti-IL-2 complex (IL-2C), a mediator of Treg expansion, can attenuate MIRI in mice. METHODS: Myocardial I/R was surgically induced in male C57BL/6 mice, aged 8-10 weeks, that were randomly assigned to 1) sham group (Sham), 2) Phosphate Buffered Saline (PBS), 3) IL-2-anti-IL-2 Ab complex (IL-2C), or 4) sham group, 5) PBS, 6) IL-2C after MIRI, or 7) IL-2C, 8) IL-2C+anti-CD25 mAbs, or 9) IL-2C; 10) IL-2C+anti-TGF-β1 mAbs, 11) IL-2C+anti-IL-10 mAbs...
December 7, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29221684/ex-vivo-flush-of-the-limb-allograft-reduces-inflammatory-burden-prior-to-transplantation
#14
Kavit R Amin, Alexandra L Ball, Chandanpreet Chhina, Rebecca J Edge, John P Stone, William R Critchley, Jason K Wong, James E Fildes
BACKGROUND: Passenger leucocytes and inflammatory debris transferred from the donor limb to the recipient can induce allorecognition, which activates the host immune response. This is the first study to evaluate whether the transfer of this inflammatory burden can be reduced via post-preservation flush prior to revascularisation, and whether this is influenced by ischaemia. METHODS: Bilateral forelimbs from the same pig were procured and infused with preservation flush and stored on ice...
November 24, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/29218410/cardioprotective-effect-of-thyroid-hormone-is-mediated-by-at2-receptor-and-involves-nitric-oxide-production-via-akt-activation-in-mice
#15
Ivson Bezerra da Silva, Dayane Aparecida Gomes, Natalia Alenina, Michael Bader, Robson Augusto Dos Santos, Maria Luiza M Barreto-Chaves
Studies have demonstrated that thyroid hormone (T3) can precondition the heart against ischaemic injury and improve post-ischaemic recovery. This study investigated whether the AT2 receptor (AT2R) is involved in cardioprotection and the potential molecular mechanism responsible for this effect. Hyperthyroidism was induced in male wild-type (WT) and AT2R knockout (KO) mice by administering daily intraperitoneal injections of T3 (7 μg/100 g body weight) for 14 days. The mouse hearts were harvested and perfused with a Krebs-Henseleit solution at a constant flow in a Langendorff set-up...
December 7, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/29217496/protective-action-of-crtaeva-nurvala-buch-ham-extracts-against-renal-ischaemia-reperfusion-injury-in-rats-via-antioxidant-and-anti-inflammatory-activities
#16
Mouchira Aly Choucry, Mohammed N A Khalil, Sally A El Awdan
ETHNOPHARMACOLOGICAL RELEVANCE: Crateva nurvala stem bark is commonly used in Ayruveda in treatment of many renal injuries, e.g., urinary lithiasis, diuretic and nephroprotective. However, its protective effect against renal ischaemia/reperfusion, the major cause of acute kidnea injury, has never been studied. Moreover, no comprehensive chemical profiling of its extracts was recorded. AIM OF THE STUDY: Assessment of the protective effect of both extracts against renal ischaemia/reperfusion and elucidation of the possible mechanism of action...
December 4, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29208472/role-of-transglutaminase-2-in-a1-adenosine-receptor-and-%C3%AE-2-adrenoceptor-mediated-pharmacological-pre-and-post-conditioning-against-hypoxia-reoxygenation-induced-cell-death-in-h9c2-cells
#17
Falguni S Vyas, Carl P Nelson, John M Dickenson
Pharmacologically-induced pre- and post-conditioning represent attractive therapeutic strategies to reduce ischaemia/reperfusion injury during cardiac surgery and following myocardial infarction. We have previously reported that transglutaminase 2 (TG2) activity is modulated by the A1 adenosine receptor and β2-adrenoceptor in H9c2 cardiomyoblasts. The primary aim of this study was to determine the role of TG2 in A1 adenosine receptor and β2-adrenoceptor-induced pharmacological pre- and post-conditioning in the H9c2 cells...
December 2, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29196746/diabetes-aggravates-post-ischaemic-renal-fibrosis-through-persistent-activation-of-tgf-%C3%AE-1-and-shh-signalling
#18
Dong-Jin Kim, Jun Mo Kang, Seon Hwa Park, Hyuk-Kwon Kwon, Seok-Jong Song, Haena Moon, Su-Mi Kim, Jung-Woo Seo, Yu Ho Lee, Yang Gyun Kim, Ju-Young Moon, So-Young Lee, Youngsook Son, Sang-Ho Lee
Diabetes is a risk factor for acute kidney injury (AKI) and chronic kidney disease (CKD). Diabetic patients are easy to progress to CKD after AKI. Currently, activation of fibrotic signalling including transforming growth factor-β1 (TGF-β1) is recognized as a key mechanism in CKD. Here, we investigated the influence of diabetes on CKD progression after AKI by using a unilateral renal ischaemia-reperfusion injury (IRI) model in diabetic mice. IRI induced extensive tubular injury, fibrosis and lymphocyte recruitment at 3 weeks after IRI, irrespective of diabetes...
December 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29193065/stereological-assessment-of-the-blood-air-barrier-and-the-surfactant-system-after-mesenchymal-stem-cell-pretreatment-in-a-porcine-non-heart-beating-donor-model-for-lung-transplantation
#19
Anke Schnapper, Astrid Christmann, Lars Knudsen, Parwis Rahmanian, Yeong-Hoon Choi, Mohamed Zeriouh, Samira Karavidic, Klaus Neef, Anja Sterner-Kock, Maria Guschlbauer, Florian Hofmaier, Alexandra C Maul, Thorsten Wittwer, Thorsten Wahlers, Christian Mühlfeld, Matthias Ochs
More frequent utilization of non-heart-beating donor (NHBD) organs for lung transplantation has the potential to relieve the shortage of donor organs. In particular with respect to uncontrolled NHBD, concerns exist regarding the risk of ischaemia/reperfusion (IR) injury-related graft damage or dysfunction. Due to their immunomodulating and tissue-remodelling properties, bone-marrow-derived mesenchymal stem cells (MSCs) have been suspected of playing a beneficial role regarding short- and long-term survival and function of the allograft...
November 28, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/29192208/endogenous-annexin-a1-regulates-haematopoietic-stem-cell-mobilisation-and-inflammatory-response-post-myocardial-infarction-in-mice-in-vivo
#20
Cheng Xue Qin, Siobhan B Finlayson, Annas Ai-Sharea, Mitchel Tate, Miles J De Blasio, Minh Deo, Sarah Rosli, Darnel Prakoso, Colleen J Thomas, Helen Kiriazis, Eleanor Gould, Yuan H Yang, Eric F Morand, Mauro Perretti, Andrew J Murphy, Xiao-Jun Du, Xiao-Ming Gao, Rebecca H Ritchie
Endogenous anti-inflammatory annexin-A1 (ANX-A1) plays an important role in preserving left ventricular (LV) viability and function after ischaemic insults in vitro, but its long-term cardioprotective actions in vivo are largely unknown. We tested the hypothesis that ANX-A1-deficiency exaggerates inflammation, haematopoietic stem progenitor cell (HSPC) activity and LV remodelling in response to myocardial ischaemia in vivo. Adult ANX - A1 -/- mice subjected to coronary artery occlusion exhibited increased infarct size and LV macrophage content after 24-48 h reperfusion compared with wildtype (WT) counterparts...
November 30, 2017: Scientific Reports
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