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https://www.readbyqxmd.com/read/29409011/cardiomyocyte-specific-deletion-of-sirt1-gene-sensitizes-myocardium-to-ischemia-and-reperfusion-injury
#1
Lin Wang, Nanhu Quan, Wanqing Sun, Xu Chen, Courtney Cates, Thomas Rousselle, Xinchun Zhou, Xuezhong Zhao, Ji Li
Aim: A longevity gene, Sirtuin 1 (SIRT1) and energy sensor AMP-activated protein kinase (AMPK) have common activators such as caloric restriction, oxidative stress and exercise. The objective of this study is to characterize the role of cardiomyocyte SIRT1 in age-related impaired ischemic AMPK activation and increased susceptibility to ischemic insults. Methods and Results: Mice were subjected to ligation of left anterior descending coronary artery for in vivo ischemic models...
February 2, 2018: Cardiovascular Research
https://www.readbyqxmd.com/read/29408448/protection-by-dimethyl-fumarate-against-diabetic-cardiomyopathy-in-type-1-diabetic-mice-likely-via-activation-of-nuclear-factor-erythroid-2-related-factor-2
#2
Xinyue Hu, Mohanraj Rajesh, Jian Zhang, Shanshan Zhou, Shudong Wang, Jian Sun, Yi Tan, Yang Zheng, Lu Cai
Oxidative stress and inflammation play key roles in the development of diabetic cardiomyopathy (DCM). Dimethyl fumarate (DMF), an FDA approved medicine for relapsing multiple sclerosis, has manifested its antioxidant and anti-inflammatory function mostly in the central nervous system. In this study, we investigated whether DMF could attenuate the development of DCM. Type 1 diabetes mouse model was established using multiple low-dose streptozotocin, and the diabetic mice were treated with DMF (10 mg/kg body weight) for 3 months...
February 2, 2018: Toxicology Letters
https://www.readbyqxmd.com/read/29398998/postoperative-myocardial-injury-and-inflammation-is-not-blunted-by-a-trial-of-atorvastatin-in-orthopedic-surgery-patients
#3
Anne R Bass, Jackie D Szymonifka, Matthew T Rondina, Margaret Bogardus, Mitchell G Scott, Scott C Woller, Scott M Stevens, Charles Eby, Kerri Merritt, Alejandro Gonzalez Della Valle, Gerard Moskowitz, Eva Flores, Brian F Gage
Background: Orthopedic patients are at risk for adverse postoperative cardiovascular outcomes. Questions/Purposes: This pilot randomized controlled trial (RCT) of atorvastatin vs. placebo in orthopedic surgery patients was performed in order to assess: (1) the prevalence of perioperative myocardial injury; (2) the effect of atorvastatin on perioperative inflammation; and (3) the feasibility of performing a large RCT of statin therapy in orthopedic patients. Methods: Hip fracture (hip Fx) and total hip and knee replacement (THR and TKR) patients were randomized 1:1 to atorvastatin 40 mg daily vs...
February 2018: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
https://www.readbyqxmd.com/read/29298239/resuscitative-endovascular-balloon-occlusion-of-the-aorta-for-pelvic-blunt-trauma-and-life-threatening-hemorrhage-a-20-year-experience-in-a-level-i-trauma-center
#4
Audrey Pieper, Frédéric Thony, Julien Brun, Mathieu Rodière, Bastien Boussat, Catherine Arvieux, Jérôme Tonetti, Jean-François Payen, Pierre Bouzat
BACKGROUND: Resuscitative endovascular balloon occlusion of the aorta (REBOA) is increasingly used as a non-invasive clamp of the aorta after diverse post-traumatic injuries. Balloon inflation in zone 3 (from the lower renal artery to the aortic bifurcation) can be performed to stop on-going bleeding after severe pelvic trauma with life-threatening hemorrhage. The aim of our study was to describe our 20-year experience with REBOA in terms of efficacy and safety in patients with a suspicion of severe pelvic trauma and extreme hemorrhagic shock...
January 2, 2018: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/29276374/plasma-cytochrome-c-detection-using-a-highly-sensitive-electrochemiluminescence-enzyme-linked-immunosorbent-assay
#5
Jeejabai Radhakrishnan, Rovi Origenes, Gina Littlejohn, Sanja Nikolich, Eunjung Choi, Sharon Smite, Lorissa Lamoureux, Alvin Baetiong, Manoj Shah, Raúl J Gazmuri
Background: Cytochrome c is an intermembrane mitochondrial protein that is released to the bloodstream following mitochondrial injury. Methods and results: We developed an electrochemiluminescence immunoassay to measure cytochrome c in human and rat plasma, which showed high sensitivity with broad dynamic range (2-1200 ng/mL in humans and 5-500 ng/mL in rat) and high assay reproducibility (inter-assay coefficient <6% in humans and <10% in rat). In patients after blunt trauma, plasma cytochrome c directly correlated with injury severity...
2017: Biomarker Insights
https://www.readbyqxmd.com/read/29259232/cardiac-depression-in-pigs-after-multiple-trauma-characterization-of-posttraumatic-structural-and-functional-alterations
#6
M Kalbitz, S Schwarz, B Weber, B Bosch, J Pressmar, F M Hoenes, C K Braun, K Horst, T P Simon, R Pfeifer, P Störmann, H Hummler, F Gebhard, H C Pape, M Huber-Lang, F Hildebrand
The purpose of this study was to define the relationship between cardiac depression and morphological and immunological alterations in cardiac tissue after multiple trauma. However, the mechanistic basis of depressed cardiac function after trauma is still elusive. In a porcine polytrauma model including blunt chest trauma, liver laceration, femur fracture and haemorrhage serial trans-thoracic echocardiography was performed and correlated with cellular cardiac injury as well as with the occurrence of extracellular histones in serum...
December 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29226380/acute-severe-mitral-regurgitation-after-blunt-chest-trauma
#7
Petar Saric, Benjamin D Ravaee, Toral R Patel, Brian D Hoit
Myocardial contusion and aortic injury are well-known cardiac complications of blunt chest trauma, but valvular injury is rare. Traumatic valve injuries most commonly involve the aortic valve, with isolated mitral valve injury being quite rare. We report a case of acute severe mitral regurgitation due to ruptured chordae tendineae requiring surgical repair following a motor vehicle accident.
December 11, 2017: Echocardiography
https://www.readbyqxmd.com/read/29203574/blunt-chest-trauma-a-clinical-chameleon
#8
REVIEW
Kaveh Eghbalzadeh, Anton Sabashnikov, Mohamed Zeriouh, Yeong-Hoon Choi, Alexander C Bunck, Navid Mader, Thorsten Wahlers
The incidence of blunt chest trauma (BCT) is greater than 15% of all trauma admissions to the emergency departments worldwide and is the second leading cause of death after head injury in motor vehicle accidents. The mortality due to BCT is inhomogeneously described ranging from 9% to 60%. BCT is commonly caused by a sudden high-speed deceleration trauma to the anterior chest, leading to a compression of the thorax. All thoracic structures might be injured as a result of the trauma. Complex cardiac arrhythmia, heart murmurs, hypotension, angina-like chest pain, respiratory insufficiency or distention of the jugular veins may indicate potential cardiac injury...
December 4, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/29196237/melatonin-protects-diabetic-heart-against-ischemia-reperfusion-injury-role-of-membrane-receptor-dependent-cgmp-pkg-activation
#9
Li-Ming Yu, Wen-Cheng Di, Xue Dong, Zhi Li, Yong Zhang, Xiao-Dong Xue, Yin-Li Xu, Jian Zhang, Xiong Xiao, Jin-Song Han, Yu Liu, Yang Yang, Hui-Shan Wang
It has been demonstrated that the anti-oxidative and cardioprotective effects of melatonin are, at least in part, mediated by its membrane receptors. However, the direct downstream signaling remains unknown. We previously found that melatonin ameliorated myocardial ischemia-reperfusion (MI/R) injury in diabetic animals, although the underlying mechanisms are also incompletely understood. This study was designed to determine the role of melatonin membrane receptors in melatonin's cardioprotective actions against diabetic MI/R injury with a focus on cGMP and its downstream effector PKG...
November 30, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29177620/revisiting-traumatic-cardiac-arrest-should-cpr-be-initiated
#10
Katie L Konesky, Weidun Alan Guo
OBJECTIVES: Traumatic cardiac arrest (TCA) represents a unique problem, and poses difficult challenges in the care of trauma patients. Although the literature has suggested that attempted resuscitation from TCA in trauma is futile and consumptive of medical and human resources, studies have recently demonstrated that the outcome of TCA is comparable cardiac arrest secondary to non-traumatic events. The objective of this study was to determine the incidence, predictors, and outcomes following TCA...
November 25, 2017: European Journal of Trauma and Emergency Surgery: Official Publication of the European Trauma Society
https://www.readbyqxmd.com/read/29174327/a-case-of-cardiac-arrest-associated-with-aortic-valve-regurgitation
#11
Hyun Suk Chai, Suk Woo Lee, Jung Soo Park, Sang Chul Kim, Ji Han Lee, Hoon Kim
Blunt chest trauma can cause not only damage to the thoracic cage, but can also injure intracardiac structures including the papillary muscles, chordae tendineae, and valve leaflets. Aortic valve (AV) injury secondary to blunt chest trauma is a rare occurrence. Clinically, AV injury may be missed during the initial post-trauma assessment due to the lack of suspicion of cardiac involvement. Thus, the diagnosis of AV injury is often delayed or missed for a time interval of days to months. As a consequence, the traumatic AV regurgitation can rapidly or progressively lead to congestive heart failure unless surgically corrected...
November 20, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29170351/54%C3%A2-paediatric-traumatic-cardiac-arrest-in-england-and-wales-a-10-year-epidemiological-study
#12
James Vassallo, Melanie Webster, Edward Barnard, Marisol Fragoso Iniguez, Mark Lyttle, Jason Smith
INTRODUCTION: Traumatic cardiac arrest (TCA) has traditionally been described as futile, with poor outcomes. Reported survival rates vary widely, with higher rates observed from mechanisms leading to a respiratory cause of traumatic cardiac arrest (e.g., drowning and hanging). Currently there is little evidence regarding outcomes following TCA in children. The primary aim of our study was to describe 30 day survival following TCA. Secondary aims were to provide an analysis of injury patterns (severe haemorrhage or traumatic brain injury), describe the functional outcome at discharge and to report the association between survival and interventions performed...
December 2017: Emergency Medicine Journal: EMJ
https://www.readbyqxmd.com/read/29152896/trimetazidine-restores-the-positive-adaptation-to-exercise-training-by-mitigating-statin-induced-skeletal-muscle-injury
#13
Ming Song, Fang-Fang Chen, Yi-Hui Li, Lei Zhang, Feng Wang, Ran-Ran Qin, Zhi-Hao Wang, Ming Zhong, Meng-Xiong Tang, Wei Zhang, Lu Han
BACKGROUND: Exercise rehabilitation is demonstrated to improve the prognosis of patients with coronary heart disease (CHD). Statins, as the key medicine to lower cholesterol in CHD, result in skeletal muscle injury and impair exercise training adaptation. Energy metabolism dysfunction is identified as the potential mechanism underlying statin-induced skeletal muscle injury. In this study, we investigated the effects of the metabolic modulator trimetazidine on skeletal muscle energy metabolism and statin-associated exercise intolerance...
November 19, 2017: Journal of Cachexia, Sarcopenia and Muscle
https://www.readbyqxmd.com/read/29150222/retrospective-study-of-thoracotomy-performed-in-a-french-level-1-trauma-center
#14
A Mancini, A Bonne, A Pirvu, P Porcu, P Bouzat, J Abba, C Arvieux
OBJECTIVE: Resuscitative thoracotomy, a potentially life-saving procedure, is used exceptionally, and essentially for penetrating trauma. Most of the available literature is American while reports from Europe are sparse. We report our experience in a French level 1-trauma center. MATERIAL AND METHODS: Patient records (patient age, gender, mechanism of injury, indication for emergency thoracotomy, anatomic injuries, interventions and survival) for all patients who underwent emergency thoracotomy between January 2005 and December 2015 were analyzed...
November 14, 2017: Journal of Visceral Surgery
https://www.readbyqxmd.com/read/29149759/dusp1-alleviates-cardiac-ischemia-reperfusion-injury-by-suppressing-the-mff-required-mitochondrial-fission-and-bnip3-related-mitophagy-via-the-jnk-pathways
#15
Qinhua Jin, Ruibing Li, Nan Hu, Ting Xin, Pingjun Zhu, Shunying Hu, Sai Ma, Hong Zhu, Jun Ren, Hao Zhou
Mitochondrial fission and selective mitochondrial autophagy (mitophagy) form an essential axis of mitochondrial quality control that plays a critical role in the development of cardiac ischemia-reperfusion (IR) injury. However, the precise upstream molecular mechanism of fission/mitophagy remains unclear. Dual-specificity protein phosphatase1 (DUSP1) regulates cardiac metabolism, but its physiological contribution in the reperfused heart, particularly its influence on mitochondrial homeostasis, is unknown. Here, we demonstrated that cardiac DUSP1 was downregulated following acute cardiac IR injury...
November 6, 2017: Redox Biology
https://www.readbyqxmd.com/read/29147465/myricetin-possesses-potential-protective-effects-on-diabetic-cardiomyopathy-through-inhibiting-i%C3%AE%C2%BAb%C3%AE-nf%C3%AE%C2%BAb-and-enhancing-nrf2-ho-1
#16
Hai-Han Liao, Jin-Xiu Zhu, Hong Feng, Jian Ni, Nan Zhang, Si Chen, Huang-Jun Liu, Zheng Yang, Wei Deng, Qi-Zhu Tang
Diabetic cardiomyopathy (DCM) is associated with a greater risk of mortality in patients with diabetes mellitus. Currently, no specific treatment has been suggested for DCM treatment. This study demonstrated that myricetin (M) attenuated DCM-associated cardiac injury in mice subjected to streptozotocin (SZT) and in neonatal rat cardiomyocytes (NRCM) challenged with high glucose. In vivo investigation demonstrated 6 months of M treatment (200 mg/kg/d) significantly alleviated cardiac hypertrophy, apoptosis, and interstitial fibrosis...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29138662/st-segment-elevation-after-blunt-chest-trauma-myocardial-contusion-with-normal-coronary-arteries-or-myocardial-infarction-following-coronary-lesions
#17
Amine Ghalem, Hanane Boussir, Kamal Ahsayan, Nabila Ismaili, Noha El Ouafi
Cardiac lesions secondary to blunt chest trauma vary from insignificant arrhythmias to fatal cardiac rupture. Of these, a distinction remains difficult; face to ST-segment elevation on ECG with positive cardiac biomarkers, is it a myocardial contusion or a genuine myocardial infarction (MI) secondary to coronary lesions? We report the case of a patient admitted for multiple trauma. Initial assessment showed an ST segment elevation on ECG, along with multiple fractures and abdominal injuries. We would like to discuss, through this case, the similarities and the differences between myocardial infarction due to coronary lesions and myocardial contusion in a traumatic context, but also emphasize the difficulty of striking the right balance between thrombotic and bleeding risks in this situation, and insist on the importance of a multidisciplinary and collegial reflexion so we can offer these patients the best care there is...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/29121655/experimental-blunt-chest-trauma-induced-myocardial-inflammation-and-alteration-of-gap-junction-protein-connexin-43
#18
Miriam Kalbitz, Elisa Maria Amann, Belinda Bosch, Annette Palmer, Anke Schultze, Jochen Pressmar, Birte Weber, Martin Wepler, Florian Gebhard, Hubert Schrezenmeier, Rolf Brenner, Markus Huber-Lang
OBJECTIVE: Severe blunt chest trauma in humans is associated with high mortality rates. Whereas lung tissue damage and lung inflammation after blunt chest trauma have extensively been investigated, the traumatic and posttraumatic effects on the heart remain poorly understood. Therefore, the purpose of this study was to define cardiac injury patterns in an experimental blunt chest trauma model in rats. METHODS: Experimental blunt chest trauma was induced by a blast wave in rats, with subsequent analysis of its effects on the heart...
2017: PloS One
https://www.readbyqxmd.com/read/29077678/is-it-safe-nonoperative-management-of-blunt-splenic-injuries-in-geriatric-trauma-patients
#19
Marc D Trust, Pedro G Teixeira, Lawrence H Brown, Sadia Ali, Ben Coopwood, Jayson D Aydelotte, Carlos V R Brown
BACKGROUND: Because of increased failure rates of nonoperative management (NOM) of blunt splenic injuries (BSI) in the geriatric population, dogma dictated that this management was unacceptable. Recently, there has been an increased use of this treatment strategy in the geriatric population. However, published data assessing the safety of NOM of BSI in this population is conflicting, and well-powered multicenter data are lacking. METHODS: We performed a retrospective analysis of data from the National Trauma Data Bank (NTDB) from 2014 and identified young (age < 65) and geriatric (age ≥ 65) patients with a BSI...
January 2018: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/29057374/a-sarcoplasmic-reticulum-localized-protein-phosphatase-regulates-phospholamban-phosphorylation-and-promotes-ischemia-reperfusion-injury-in-the-heart
#20
Toru Akaike, Na Du, Gang Lu, Susumu Minamisawa, Yibin Wang, Hongmei Ruan
Phospholamban (PLN) is a key regulator of sarcolemma calcium uptake in cardiomyocyte, its inhibitory activity to SERCA is regulated by phosphorylation. PLN hypophosphorylation is a common molecular feature in failing heart. The current study provided evidence at molecular, cellular and whole heart levels to implicate a sarcolemma membrane targeted protein phosphatase, PP2Ce, as a specific and potent PLN phosphatase. PP2Ce expression was elevated in failing human heart and induced acutely at protein level by β -adrenergic stimulation or oxidative stress in cardiomyocytes...
March 2017: JACC. Basic to Translational Science
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