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https://www.readbyqxmd.com/read/29224095/sex-differences-in-muscle-wasting
#1
Lindsey J Anderson, Haiming Liu, Jose M Garcia
With aging and other muscle wasting diseases, men and women undergo similar pathological changes in skeletal muscle: increased inflammation, enhanced oxidative stress, mitochondrial dysfunction, satellite cell senescence, elevated apoptosis and proteasome activity, and suppressed protein synthesis and myocyte regeneration. Decreased food intake and physical activity also indirectly contribute to muscle wasting. Sex hormones also play important roles in maintaining skeletal muscle homeostasis. Testosterone is a potent anabolic factor promoting muscle protein synthesis and muscular regeneration...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29211855/a-rabbit-model-of-progressive-chronic-right-ventricular-pressure-overload
#2
Sara Roldan Ramos, Guido Pieles, Wei Hui, Cameron Slorach, Andrew N Redington, Mark K Friedberg
OBJECTIVES: Right ventricular (RV) failure from increased pressure loading is a frequent consequence of acquired and congenital heart diseases. However, the mechanisms involved in their pathophysiology are still unclear, and few data exist on RV pressure-loading models and early versus late effects on RV and left ventricular responses. We characterized a rabbit model of chronic RV pressure overload and early-late effects on biventricular function. METHODS: Twenty-one New Zealand white rabbits were randomized into 3 groups: (i) sham, (ii) pulmonary artery (PA) banding (PAB) for 3 weeks (PAB3W) and (iii) PAB for 6 weeks (PAB6W)...
December 2, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29211728/an-open-label-non-randomized-study-of-the-pharmacokinetics-of-the-nutritional-supplement-nicotinamide-riboside-nr-and-its-effects-on-blood-nad-levels-in-healthy-volunteers
#3
Sophia E Airhart, Laura M Shireman, Linda J Risler, Gail D Anderson, G A Nagana Gowda, Daniel Raftery, Rong Tian, Danny D Shen, Kevin D O'Brien
OBJECTIVES: The co-primary objectives of this study were to determine the human pharmacokinetics (PK) of oral NR and the effect of NR on whole blood nicotinamide adenine dinucleotide (NAD+) levels. BACKGROUND: Though mitochondrial dysfunction plays a critical role in the development and progression of heart failure, no mitochondria-targeted therapies have been translated into clinical practice. Recent murine studies have reported associations between imbalances in the NADH/NAD+ ratio with mitochondrial dysfunction in multiple tissues, including myocardium...
2017: PloS One
https://www.readbyqxmd.com/read/29210840/conoscere-e-curare-il-cuore-1986-2016-how-the-heart-has-changed
#4
Alessandro Boccanelli
: The demographic transition, with longer life expectancy, is mainly due to prevention and care of atherosclerotic vascular and heart disease. The cardiovascular patient is now much older and often presents with coexisting geriatric syndromes that affect healthcare goals, outcomes, and the process of care. Numerous mechanisms at cellular level are responsible for cardiovascular aging such as replicative senescence, apoptosis, proteins misfolding, and inflammation. Aging-related modifications are increase in left-ventricular mass, increased left atrial size, myocardial collagen deposition, and calcium deposition in valvular structures and the coronary arteries...
November 27, 2017: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/29178250/sublingual-functional-capillary-rarefaction-in-chronic-heart-failure
#5
Patricia P Wadowski, Martin Hülsmann, Christian Schörgenhofer, Irene M Lang, Raphael Wurm, Thomas Gremmel, Renate Koppensteiner, Barbara Steinlechner, Michael Schwameis, Bernd Jilma
BACKGROUND AND OBJECTIVE: Microcirculatory changes contribute to clinical symptoms and disease progression in chronic heart failure (CHF). A depression of coronary flow reserve is associated with a lower myocardial capillary density in biopsies. We hypothesized that changes in cardiac microcirculation might also be reflected by a systemic reduction of capillaries and visualized by sublingual videomicroscopy. The aim was to study in vivo capillary density and glycocalyx dimensions in patients with CHF vs...
November 25, 2017: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29157525/transcatheter-tricuspid-valve-replacement
#6
REVIEW
Amar Krishnaswamy, Jose Navia, Samir R Kapadia
Tricuspid regurgitation (TR) is a common entity, most commonly functional in nature due to right-sided dysfunction in the setting of concomitant cardiac disease or pulmonary hypertension. Patients living with TR often experience numerous limitations as a result of right-sided heart failure symptoms, including functional decline, frequent hospitalizations, liver failure, and kidney failure. Furthermore, patients with significant TR demonstrate worse survival, although a cause-and-effect relationship has not been proven...
January 2018: Interventional cardiology clinics
https://www.readbyqxmd.com/read/29135830/tissue-resident-lymphocytes-in-solid-organ-transplantation-innocent-passengers-or-the-key-to-organ-transplant-survival
#7
Amy C Prosser, Axel Kallies, Michaela Lucas
Short-term outcomes of solid organ transplantation have improved dramatically over the past several decades; however, long-term survival has remained static over the same time period, and chronic rejection remains a major cause of graft failure. The importance of donor, or 'passenger', lymphocytes to the induction of tolerance to allografts was recognized in the 1990s; however, their precise contribution to graft acceptance or rejection has not been elucidated. Recently, specialized populations of tissue-resident lymphocytes in nonlymphoid organs have been described...
November 14, 2017: Transplantation
https://www.readbyqxmd.com/read/29100896/liver-disease-and-heart-failure-back-and-forth
#8
REVIEW
Michele Correale, Nicola Tarantino, Rossella Petrucci, Lucia Tricarico, Irma Laonigro, Matteo Di Biase, Natale Daniele Brunetti
In their clinical practice, physicians can face heart diseases (chronic or acute heart failure) affecting the liver and liver diseases affecting the heart. Systemic diseases can also affect both heart and liver. Therefore, it is crucial in clinical practice to identify complex interactions between heart and liver, in order to provide the best treatment for both. In this review, we sought to summarize principal evidence explaining the mechanisms and supporting the existence of this complicate cross-talk between heart and liver...
October 31, 2017: European Journal of Internal Medicine
https://www.readbyqxmd.com/read/29098408/increased-serum-wisteria-floribunda-agglutinin-positive-mac-2-binding-protein-mac-2-binding-protein-glycosylation-isomer-in-chronic-heart-failure-a-pilot-study
#9
Atsushi Okada, Hideaki Kanzaki, Yasuhiro Hamatani, Seiji Takashio, Hiroyuki Takahama, Makoto Amaki, Takuya Hasegawa, Yasuo Sugano, Satoshi Yasuda, Toshihisa Anzai
BACKGROUND: Serum Wisteria floribunda agglutinin positive Mac-2 binding protein (WFA(+)-M2BP) or Mac-2 Binding Protein Glycosylation Isomer (M2BPGi) is a novel biomarker currently applied for evaluating hepatic fibrosis. The aim of this study was to evaluate the utility of serum WFA(+)-M2BP level as a biomarker in chronic heart failure (HF) patients with abnormal liver function. METHODS AND RESULTS: Fifty chronic HF patients who underwent measurement of serum WFA(+)-M2BP were evaluated...
November 2, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/29092916/use-of-oral-anticoagulants-in-combination-with-antiplatelet-s-in-atrial-fibrillation
#10
Caroline Sindet-Pedersen, Laila Staerk, Morten Lamberts, Thomas Alexander Gerds, Jeffrey S Berger, Anders Nissen Bonde, Jannik Langtved Pallisgaard, Morten Lock Hansen, Christian Torp-Pedersen, Gunnar H Gislason, Jonas Bjerring Olesen
OBJECTIVES: To investigate temporal trends in the use of non-vitamin K oral anticoagulants (NOACs) and vitamin K antagonists (VKAs) in combination with aspirin and/or clopidogrel in patients with atrial fibrillation (AF) following acute myocardial infarction (MI) and/or percutaneous coronary intervention (PCI). METHODS: Using Danish nationwide registries, all patients with AF who survived 30 days after discharge from MI and/or PCI between 22 August 2011 and 30 September 2016 were identified...
November 1, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/29022266/cardiac-aging-benefits-of-exercise-nrf2-activation-and-antioxidant-signaling
#11
Madhusudhanan Narasimhan, Namakkal-Soorappan Rajasekaran
Cardiovascular dysfunction and heart failure associated with aging not only impairs the cardiac function but also the quality of life eventually decreasing the life expectancy of the elderly. Notably, cardiac tissue can prematurely age under certain conditions such as genetic mutation, persistent redox stress and overload, aberrant molecular signaling, DNA damage, telomere attrition, and other pathological insults. While cardiovascular-related morbidity and mortality is on the rise and remains a global health threat, there has been only little to moderate improvements in its medical management...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28977367/novel-mouse-model-of-cardiopulmonary-bypass
#12
Nodir Madrahimov, Erin C Boyle, Faikah Gueler, Tobias Goecke, Ann-Kathrin Knöfel, Valentyna Irkha, Lavinia Maegel, Klaus Höffler, Ruslan Natanov, Issam Ismail, Ulrich Maus, Christian Kühn, Gregor Warnecke, Malakh-Lal Shrestha, Serghei Cebotari, Axel Haverich
OBJECTIVES: Cardiopulmonary bypass (CPB) is an essential component of many cardiac interventions, and therefore, there is an increasing critical demand to minimize organ damage resulting from prolonged extracorporeal circulation. Our goal was to develop the first clinically relevant mouse model of CPB and to examine the course of extracorporeal circulation by closely monitoring haemodynamic and oxygenation parameters. METHODS: Here, we report the optimization of device design, perfusion circuit and microsurgical techniques as well as validation of physiological functions during CPB in mice after circulatory arrest and reperfusion...
July 18, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28973536/the-mitochondrial-metallochaperone-sco1-maintains-ctr1-at-the-plasma-membrane-to-preserve-copper-homeostasis-in-the-murine-heart
#13
Zakery N Baker, Kimberly Jett, Aren Boulet, Amzad Hossain, Paul A Cobine, Byung-Eun Kim, Amr M El Zawily, Ling Lee, Glen F Tibbits, Michael J Petris, Scot C Leary
SCO1 is a ubiquitously expressed, mitochondrial protein with essential roles in cytochrome c oxidase (COX) assembly and the regulation of copper homeostasis. SCO1 patients present with severe forms of early onset disease, and ultimately succumb from liver, heart or brain failure. However, the inherent susceptibility of these tissues to SCO1 mutations and the clinical heterogeneity observed across SCO1 pedigrees remain poorly understood phenomena. To further address this issue, we generated Sco1hrt/hrt and Sco1stm/stm mice in which Sco1 was specifically deleted in heart and striated muscle, respectively...
September 4, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28947430/sirt2-acts-as-a-cardioprotective-deacetylase-in-pathological-cardiac-hypertrophy
#14
Xiaoqiang Tang, Xiao-Feng Chen, Nan-Yu Wang, Xiao-Man Wang, Shu-Ting Liang, Wei Zheng, Yun-Biao Lu, Xiang Zhao, De-Long Hao, Zhu-Qin Zhang, Ming-Hui Zou, De-Pei Liu, Hou-Zao Chen
BACKGROUND: Pathological cardiac hypertrophy induced by stresses such as aging and neurohumoral activation is an independent risk factor for heart failure and is considered a target for the treatment of heart failure. However, the mechanisms underlying pathological cardiac hypertrophy remain largely unknown. We aimed to investigate the roles of SIRT2 in aging-related and angiotensin II (Ang II)-induced pathological cardiac hypertrophy. METHODS: Male C57BL/6J wild-type and Sirt2 knockout mice were subjected to the investigation of aging-related cardiac hypertrophy...
November 21, 2017: Circulation
https://www.readbyqxmd.com/read/28932489/the-impact-of-cardiac-resynchronization-therapy-on-routine-laboratory-parameters
#15
András Mihály Boros, Péter Perge, Klaudia Vivien Nagy, Astrid Apor, Zsolt Bagyura, Endre Zima, Levente Molnár, Tamás Tahin, Dávid Becker, László Gellér, Béla Merkely, Gábor Széplaki
BACKGROUND: Cardiac resynchronization therapy (CRT) in chronic heart failure has been shown to improve mortality and morbidity. However, comprehensive data are not available as concerns how circulating biomarkers reflecting different organ functions, such as serum uric acid, blood urea nitrogen (BUN), albumin, cholesterol, or various liver enzymes, change over time as a consequence of CRT. The aim of this prospective study was to overview these possible changes. METHODS: A total of 20 routine laboratory parameters were measured in 122 control subjects and in 129 patients with chronic heart failure before CRT, 6 months, and 2 years later...
March 2017: Interventional Medicine & Applied Science
https://www.readbyqxmd.com/read/28931509/development-and-validation-of-qmortality-risk-prediction-algorithm-to-estimate-short-term-risk-of-death-and-assess-frailty-cohort-study
#16
Julia Hippisley-Cox, Carol Coupland
Objectives To derive and validate a risk prediction equation to estimate the short term risk of death, and to develop a classification method for frailty based on risk of death and risk of unplanned hospital admission.Design Prospective open cohort study.Participants Routinely collected data from 1436 general practices contributing data to QResearch in England between 2012 and 2016. 1079 practices were used to develop the scores and a separate set of 357 practices to validate the scores. 1.47 million patients aged 65-100 years were in the derivation cohort and 0...
September 20, 2017: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/28879059/pulmonary-hypertension-and-cardiac-hypertrophy-in-children-recipients-of-orthotopic-living-related-liver-transplantation
#17
Magd A Kotb, Inas Abd El Satar, Ahmed M Badr, Nancy H Anis, Hoda Abd El Rahman Ismail, Alaa F Hamza, Hesham M Abdelkader
Surgical stress, liberation of cytokines associated with re-perfusion injury, and long standing use of immune suppressive medications in children recipients of orthotopic living related liver transplantation (OLRLT) pose cardiovascular risk. Reported cardiovascular adverse effects vary from left ventricular wall thickening, hypertrophic cardiomyopathy to resting ECG abnormalities, asymptomatic ST depression following increased heart rate and ventricular arrhythmias. Twenty-five consecutive children recipients of OLRLT were assessed by conventional 2-D, M-mode echocardiography and Doppler...
November 2017: Journal of Advanced Research
https://www.readbyqxmd.com/read/28869702/the-prevalence-and-preventability-of-potentially-relevant-drug-drug-interactions-in-patients-admitted-for-cardiovascular-diseases-a-cross-sectional-study
#18
Milena Kovačević, Sandra Vezmar Kovačević, Branislava Miljković, Slavica Radovanović, Predrag Stevanović
AIM: The aim was to describe the type and prevalence of potentially relevant drug-drug interactions (pDDIs) in a population of patients admitted for cardiovascular diseases (CVD), and management strategies for reducing the occurrence of pDDIs. METHODS: A retrospective cross-sectional study was performed on Cardiology ward of University Clinical Hospital Center in Belgrade, Serbia. A total of 527 patients, with more than one prescription during hospital stay, were enrolled in this study...
October 2017: International Journal of Clinical Practice
https://www.readbyqxmd.com/read/28865727/altered-mitochondrial-epigenetics-associated-with-subchronic-doxorubicin-cardiotoxicity
#19
André Ferreira, Teresa Cunha-Oliveira, Rui F Simões, Filipa S Carvalho, Ana Burgeiro, Kendra Nordgren, Kendall B Wallace, Paulo J Oliveira
Doxorubicin (DOX), a potent and broad-spectrum antineoplastic agent, causes an irreversible, cumulative and dose-dependent cardiomyopathy that ultimately leads to congestive heart failure. The mechanisms responsible for DOX cardiotoxicity remain poorly understood, but seem to involve mitochondrial dysfunction on several levels. Epigenetics may explain a portion of this effect. Since mitochondrial dysfunction may affect the epigenetic landscape, we hypothesize that this cardiac toxicity may result from epigenetic changes related to disruption of mitochondrial function...
September 1, 2017: Toxicology
https://www.readbyqxmd.com/read/28865508/carcinoid-syndrome-and-carcinoid-heart-disease-as-manifestations-of-non-metastatic-ovarian-neuroendocrine-tumour
#20
Joana Simões-Pereira, Lai Mun Wang, Attila Kardos, Ashley Grossman
The carcinoid syndrome is rare but it is associated with carcinoid heart disease in more than a half of the cases. Carcinoid heart disease is typically characterised by morphological and functional modifications of right-sided valves. Its aetiology is probable multifactorial but serotonin appears to play a key role in the development of this valvular disease. Unlike gastrointestinal neuroendocrine tumours, ovarian neuroendocrine tumours can present with carcinoid syndrome and carcinoid heart disease in the absence of liver metastases; such ovarian neuroendocrine tumours are a unique clinical entity...
May 31, 2017: Acta Médica Portuguesa
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