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https://www.readbyqxmd.com/read/28091757/-renal-protection-in-intensive-care-myths-and-facts
#1
S John
BACKGROUND: Acute kidney injury (AKI) is a common and severe complication in patients on the intensive care unit with a significant impact on patient mortality, morbidity and costs of care; therefore, renal protective therapy is most important in these severely ill patients. AIM OF THE REVIEW: Many renal protective strategies have been postulated during the last decades, which are sometimes still in place as a kind of "myth" but which are not always proven by evidence-based "facts"...
January 13, 2017: Der Anaesthesist
https://www.readbyqxmd.com/read/28091697/heat-shock-transcription-factor-1-protects-against-pressure-overload-induced-cardiac-fibrosis-via-smad3
#2
Ning Zhou, Yong Ye, Xingxu Wang, Ben Ma, Jian Wu, Lei Li, Lin Wang, Dao Wen Wang, Yunzeng Zou
: Fibrotic cardiac muscle exhibits high stiffness and low compliance which are major risk factors of heart failure. Although heat shock transcription factor 1 (HSF1) was identified as an intrinsic cardioprotective factor, the role that HSF1 plays in cardiac fibrosis remains unclear. Our study aims to investigate the role of HSF1 in pressure overload-induced cardiac fibrosis and the underlying mechanism. HSF1 phosphorylation was significantly downregulated in transverse aortic constriction (TAC)-treated mouse hearts and mechanically stretched cardiac fibroblasts (cFBs)...
January 13, 2017: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
https://www.readbyqxmd.com/read/28069685/associations-of-body-mass-index-with-laboratory-and-biomarkers-in-patients-with-acute-heart-failure
#3
Koen W Streng, Jozine M Ter Maaten, John G Cleland, Christopher M O'Connor, Beth A Davison, Marco Metra, Michael M Givertz, John R Teerlink, Piotr Ponikowski, Daniel M Bloomfield, Howard C Dittrich, Hans L Hillege, Dirk J van Veldhuisen, Adriaan A Voors, Peter van der Meer
BACKGROUND: Plasma concentrations of natriuretic peptides decline with obesity in patients with heart failure. Whether this is true for other biomarkers is unknown. We investigated a wide range of biomarker profiles in acute heart failure across the body mass index (BMI) spectrum. METHODS AND RESULTS: A total of 48 biomarkers, assessing multiple pathophysiological pathways, were measured in 2033 patients included in PROTECT (Placebo-Controlled Randomized Study of the Selective A1 Adenosine Receptor Antagonist Rolofylline for Patients Hospitalized With Acute Decompensated Heart Failure and Volume Overload to Assess Treatment Effect on Congestion and Renal Function), a trial comparing the effects of rolofylline to placebo in patients with acute heart failure...
January 2017: Circulation. Heart Failure
https://www.readbyqxmd.com/read/28062415/cardiomyocyte-specific-ablation-of-cd36-accelerates-the-progression-from-compensated-cardiac-hypertrophy-to-heart-failure
#4
Miranda M Sung, Nikole J Byrne, Ty T Kim, Jody Levasseur, Grant Masson, Jamie Boisvenue, Maria Febbraio, Jason R B Dyck
Previous studies have shown that loss of CD36 protects the heart from dysfunction induced by pressure overload in the presence of diet-induced insulin resistance and/or obesity. The beneficial effects of CD36 ablation in this context are mediated by preventing excessive cardiac fatty acid (FA) entry and reducing lipotoxic injury. However, whether or not the loss of CD36 can prevent pressure overload-induced cardiac dysfunction in the absence of chronic exposure to high circulating FAs is currently unknown. To address this, we utilized a tamoxifen inducible cardiomyocyte-specific CD36 knockout (icCD36KO) mouse and genetically deleted CD36 in adulthood...
January 6, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28062414/a-novel-complex-i-inhibitor-protects-against-hypertension-induced-left-ventricular-hypertrophy
#5
Nobutoshi Matsumura, Ian M Robertson, Shereen M Hamza, Carrie-Lynn M Soltys, Miranda M Sung, Grant Masson, Donna L Beker, Jason R B Dyck
Since left ventricular hypertrophy (LVH) increases the susceptibility for the development of other cardiac conditions, pharmacotherapy that mitigates pathological cardiac remodeling may prove to be beneficial in patients with LVH. Previous work has shown that the activation of the energy-sensing kinase, AMP-activated protein kinase (AMPK), can inhibit some of the molecular mechanisms that are involved in LVH. Of interest, metformin activates AMPK through its inhibition of mitochondrial complex 1 in the electron transport chain, and can prevent LVH induced by pressure overload...
January 6, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28060255/a-model-of-cardiac-remodeling-through-constriction-of-the-abdominal-aorta-in-rats
#6
Hui-Chun Ku, Shih-Yi Lee, Yuan-Kun Aden Wu, Kai-Chien Yang, Ming-Jai Su
Heart failure is one of the leading causes of death worldwide. It is a complex clinical syndromethat includes fatigue, dyspnea, exercise intolerance, and fluid retention. Changes in myocardial structure, electrical conduction, and energy metabolism develop with heart failure, leading to contractile dysfunction, increased risk of arrhythmias, and sudden death. Hypertensive heart disease is one of the key contributing factors of cardiac remodeling associated with heart failure. The most commonly-used animal model mimicking hypertensive heart disease is created via surgical interventions, such as by narrowing the aorta...
December 2, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28045017/protective-effects-of-intercalated-disk-protein-afadin-on-chronic-pressure-overload-induced-myocardial-damage
#7
Dimitar P Zankov, Akio Shimizu, Miki Tanaka-Okamoto, Jun Miyoshi, Hisakazu Ogita
Adhesive intercellular connections at cardiomyocyte intercalated disks (IDs) support contractile force and maintain structural integrity of the heart muscle. Disturbances of the proteins at IDs deteriorate cardiac function and morphology. An adaptor protein afadin, one of the components of adherens junctions, is expressed ubiquitously including IDs. At present, the precise role of afadin in cardiac physiology or disease is unknown. To explore this, we generated conditional knockout (cKO) mice with cardiomyocyte-targeted deletion of afadin...
January 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28033626/-overview-and-introduction-of-a-treatment-concept-for-postoperative-care-and-mobilisation-after-free-flap-transplantation-in-the-lower-extremity
#8
M Cerny, J-T Schantz, H Erne, D Schmauss, R E Giunta, H-G Machens, T Schenck
Introduction: Free flap transplants for soft tissue reconstruction in the lower extremity are associated with a higher rate of complications compared with other areas. Mobilisation and the resulting hydrostatic pressure put strain on the flaps. In general, these effects are countered by slowly increasing hydrostatic pressure with the leg being compressed by elastic bandages. These postoperative regimes are also called dangling procedures or "flap training", but are not scientifically validated and therefore there is no consensus or guideline leading to a standard treatment regime...
December 2016: Handchirurgie, Mikrochirurgie, Plastische Chirurgie
https://www.readbyqxmd.com/read/28033136/permissive-hypotension-and-trauma-can-fluid-restriction-reduce-the-incidence-of-ards
#9
Melissa Kolarik, Eric Roberts
Emergency care, including the resuscitation of patients involved in traumatic events, has evolved over the years. A prior practice of utilizing large volumes of crystalloids has been found to contribute to complications such as coagulopathy, fluid overload, and adult respiratory distress syndrome (ARDS). In contrast, permissive hypotension is a method of fluid restriction that allows for low blood pressure and mean arterial pressure during the resuscitation period. When permissive hypotension occurs and fluids are restricted in trauma patients, the incidence of ARDS can be reduced significantly with improvement in patient outcomes...
January 2017: Journal of Trauma Nursing: the Official Journal of the Society of Trauma Nurses
https://www.readbyqxmd.com/read/28031479/peptidylarginine-deiminase-4-promotes-age-related-organ-fibrosis
#10
Kimberly Martinod, Thilo Witsch, Luise Erpenbeck, Alexander Savchenko, Hideki Hayashi, Deya Cherpokova, Maureen Gallant, Maximilian Mauler, Stephen M Cifuni, Denisa D Wagner
Aging promotes inflammation, a process contributing to fibrosis and decline in organ function. The release of neutrophil extracellular traps (NETs [NETosis]), orchestrated by peptidylarginine deiminase 4 (PAD4), damages organs in acute inflammatory models. We determined that NETosis is more prevalent in aged mice and investigated the role of PAD4/NETs in age-related organ fibrosis. Reduction in fibrosis was seen in the hearts and lungs of aged PAD4(-/-) mice compared with wild-type (WT) mice. An increase in left ventricular interstitial collagen deposition and a decline in systolic and diastolic function were present only in WT mice, and not in PAD4(-/-) mice...
December 28, 2016: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28013046/loss-of-tradd-attenuates-pressure-overload-induced-cardiac-hypertrophy-through-regulating-tak1-p38-mapk-signalling-in-mice
#11
Lianpin Wu, Zhiyong Cao, Liqin Mei, Ling Ji, Qike Jin, Jingjing Zeng, Jiafeng Lin, Maoping Chu, Lei Li, Xiangjun Yang
We investigated the role of tumour necrosis factor receptor (TNFR)-associated death domain (TRADD) on pressure overload-induced cardiac hypertrophy and the underlying molecular mechanisms by using a TRADD deficiency mice model. 6-8 weeks wild-type and TRADD knockout mice were performed to transverse aorta constriction (TAC) or sham operation (6-8 mice for each group). 14 days after TAC, cardiac function was measured by echocardiography, as well as by pathological and molecular analyses of heart samples. The expressions of cardiac hypertrophic and fibrotic markers were detected by qPCR...
December 21, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28011900/dusps-as-critical-regulators-of-cardiac-hypertrophy
#12
Douglas G Tilley, Abdelkarim Sabri
This commentary highlights the research presented by Li et al. [15]. In this issue of Clinical Science, which demonstrates that dual specific phosphatase 12 (DUSP12), through JNK1/2 inhibition, alleviates cardiac hypertrophy in response to pressure overload, making it a potential therapeutic target.
January 1, 2017: Clinical Science (1979-)
https://www.readbyqxmd.com/read/28011586/activation-of-ppar%C3%AE-in-the-early-stage-of-heart-failure-maintained-myocardial-function-and-energetics-in-pressure-overload-heart-failure
#13
Satoshi Kaimoto, Atsushi Hoshino, Makoto Ariyoshi, Yoshifumi Okawa, Shuhei Tateishi, Kazunori Ono, Motoki Uchihashi, Kuniyoshi Fukai, Eri Iwai-Kanai, Satoaki Matoba
Failing heart loses its metabolic flexibility, relying increasingly on glucose as its preferential substrate and decreasing fatty acid oxidation (FAO). Peroxisome proliferator-activated receptor α (PPARα) is a key regulator of this substrate shift. However, its role during heart failure is complex and remains unclear. Recent studies reported that heart failure develops in the heart of MHC-PPARαmice in a manner similar to that of diabetic cardiomyopathy, whereas cardiac dysfunction is enhanced in PPARα knockout mice in response to chronic pressure overload...
December 23, 2016: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28008986/inhibition-of-farnesyl-pyrophosphate-synthase-improves-pressure-overload-induced-chronic-cardiac-remodeling
#14
Chen-Ze Zhao, Xu-Ming Zhao, Jian Yang, Yun Mou, Bin Chen, Huan-Dong Wu, Dong-Pu Dai, Jie Ding, Shen-Jiang Hu
Farnesyl pyrophosphate synthase (FPPS) is a key enzyme in the mevalonate pathway. In our previous studies, we find that inhibition of FPPS attenuates angiotensin II-induced cardiac hypertrophy and fibrosis by suppressing RhoA while FPPS and Ras are up-regulated in pressure overload rats. In this study, we evaluate the effects and mechanisms of FPPS inhibition in pressure overload mice. Male FPPS-small interfering RNA (SiRNA) transgenic (Tg) mice and non-transgenic littermate control (NLC) were randomly divided into suprarenal abdominal aortic constriction (AAC) group and sham operation group...
December 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/28006695/role-of-atrial-endothelial-cells-in-the-development-of-atrial-fibrosis-and-fibrillation-in-response-to-pressure-overload
#15
Osamu Kume, Yasushi Teshima, Ichitaro Abe, Yuki Ikebe, Takahiro Oniki, Hidekazu Kondo, Shotaro Saito, Akira Fukui, Kunio Yufu, Masahiro Miura, Tatsuo Shimada, Naohiko Takahashi
BACKGROUND: Monocyte chemoattractant protein-1 (MCP-1)-mediated inflammatory mechanisms have been shown to play a crucial role in atrial fibrosis induced by pressure overload. In the present study, we investigated whether left atrial endothelial cells would quickly respond structurally and functionally to pressure overload to trigger atrial fibrosis and fibrillation. METHODS AND RESULTS: Six-week-old male Sprague-Dawley rats underwent suprarenal abdominal aortic constriction (AAC) or a sham operation...
December 15, 2016: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
https://www.readbyqxmd.com/read/28002439/dexrazoxane-shows-no-protective-effect-in-the-acute-phase-of-reperfusion-during-myocardial-infarction-in-pigs
#16
Pranitha Kamat, Stijn Vandenberghe, Stephan Christen, Anjan K Bongoni, Bernhard Meier, Robert Rieben, Ahmed A Khattab
Calcium and iron overload participate in the mechanisms of ischemia/reperfusion (I/R) injury during myocardial infarction (MI). Calcium overload induces cardiomyocyte death by hypercontraction, while iron catalyses generation of reactive oxygen species (ROS). We therefore hypothesized that dexrazoxane, an intracellular metal chelator, would attenuate I/R injury. MI was induced in pigs by occlusion of the left anterior descending artery for 1 hour followed by 2 hours reperfusion. Thirty minutes before reperfusion either 5 mg/ml dexrazoxane (n = 5) or saline (n = 5) was infused intravenously...
2016: PloS One
https://www.readbyqxmd.com/read/27995700/shot-conference-report-2016-serious-hazards-of%C3%A2-transfusion%C3%A2-%C3%A2-human-factors-continue-to-cause-most%C3%A2-transfusion-related-incidents
#17
P H B Bolton-Maggs
The Annual SHOT Report for incidents reported in 2015 was published on 7 July at the SHOT symposium. Once again, the majority of reports (77·7%) were associated with mistakes ('human factors'). Pressures and stress in the hospital environment contributed to several error reports. There were 26 deaths where transfusion played a part, one due to haemolysis from anti-Wr(a) (units issued electronically). The incidence of haemolysis due to this antibody has increased in recent years. Transfusion-associated circulatory overload is the most common contributor to death and major morbidity...
December 2016: Transfusion Medicine
https://www.readbyqxmd.com/read/27993608/the-cardio-renal-interrelationship
#18
REVIEW
Konstantinos Dean Boudoulas, Filippos Triposkiadis, John Parissis, Javed Butler, Harisios Boudoulas
The heart and the kidney are of utmost importance for the maintenance of cardiovascular (CV) homeostasis. In healthy subjects, hemodynamic changes in either organ may affect hemodynamics of the other organ. This interaction is fine-tuned by neurohumoral activity, including atrial natriuretic peptides, renin-angiotensin aldosterone system and sympathetic activity. Dysfunction or disease of one organ may initiate, accentuate, or precipitate dysfunction or disease state in the other organ, often leading to a vicious cycle...
December 16, 2016: Progress in Cardiovascular Diseases
https://www.readbyqxmd.com/read/27992564/microrna-497-inhibits-cardiac-hypertrophy-by-targeting-sirt4
#19
Yimin Xiao, Xiaofei Zhang, Shihao Fan, Guanghao Cui, Zhenya Shen
Cardiac hypertrophy is an adaptive enlargement of the myocardium in response to overload pressure of heart. From abundant studies, a conclusion is drawn that many microRNAs (miRNAs) are associated with cardiac hypertrophy and heart failure. To investigate the role of microRNA-497 (miR-497) in myocardial hypertrophy, two models were established in this study from cell level to integral level. Cardiac hypertrophy was induced by using angiotensin Ⅱ (Ang Ⅱ) in vitro and was created by transverse abdominal aortic constriction (TAC) in vivo...
2016: PloS One
https://www.readbyqxmd.com/read/27991560/trpc3-gef-h1-axis-mediates-pressure-overload-induced-cardiac-fibrosis
#20
Takuro Numaga-Tomita, Naoyuki Kitajima, Takuya Kuroda, Akiyuki Nishimura, Kei Miyano, Satoshi Yasuda, Koichiro Kuwahara, Yoji Sato, Tomomi Ide, Lutz Birnbaumer, Hideki Sumimoto, Yasuo Mori, Motohiro Nishida
Structural cardiac remodeling, accompanying cytoskeletal reorganization of cardiac cells, is a major clinical outcome of diastolic heart failure. A highly local Ca(2+) influx across the plasma membrane has been suggested to code signals to induce Rho GTPase-mediated fibrosis, but it is obscure how the heart specifically decodes the local Ca(2+) influx as a cytoskeletal reorganizing signal under the conditions of the rhythmic Ca(2+) handling required for pump function. We found that an inhibition of transient receptor potential canonical 3 (TRPC3) channel activity exhibited resistance to Rho-mediated maladaptive fibrosis in pressure-overloaded mouse hearts...
December 19, 2016: Scientific Reports
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