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Cardiovascular physiology

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https://www.readbyqxmd.com/read/28094206/hepatocyte-growth-factor-in-physiology-and-infectious-diseases
#1
REVIEW
Ryu Imamura, Kunio Matsumoto
Hepatocyte growth factor (HGF) is a pleiotropic cytokine composed of an α-chain and a β-chain, and these chains contain four kringle domains and a serine protease-like structure, respectively. The receptor for HGF was identified as the c-met proto-oncogene product of transmembrane receptor tyrosine kinase. HGF-induced signaling through the receptor Met provokes dynamic biological responses that support morphogenesis, regeneration, and the survival of various cells and tissues, which includes hepatocytes, renal tubular cells, and neurons...
January 13, 2017: Cytokine
https://www.readbyqxmd.com/read/28094006/salt-aldosterone-and-extrarenal-na-sensitive-responses-in-pregnancy
#2
Paula Juliet Scaife, Markus Georg Mohaupt
Outside of pregnancy excessive salt consumption is known to be harmful being linked to increased blood pressure and cardiovascular disease. However, pregnancy represents a major change to a woman's physiology resulting in an intimate adaptation to environmental conditions. It is now becoming apparent that salt is essential for a number of these changes during pregnancy including haematological, cardiac adaptations as well as directly influencing placental development and the uteroplacental immune environment...
January 10, 2017: Placenta
https://www.readbyqxmd.com/read/28093005/cardiac-and-respiratory-effects-of-deep-regional-hyperthermia-using-an-8-mhz-radiofrequency-capacitive-device-on-patients-with-cancer
#3
Rieko Izukura, Hajime Imada, Nobuko Hashiguchi, Hiroyuki Sawatari, Takayuki Ohguri, Mami Miyazono, Shin Ohta, Chizuko Takakura, Keiko Yamasaki, Chie Magota, Kanae Fujita, Hiromi Kuroda, Hideki Hirata, Tomoko Ohkusa, Akiko Chishaki
PURPOSE: Hyperthermia (HT), an adjuvant therapy for variable cancers, may cause physiological changes in the patients, which may lead to cardiovascular problems. Among various HT treatments, the physiological effects of deep regional HT are still unclear. We examined the physiological alterations throughout deep regional HT to improve the HT safety. MATERIALS AND METHODS: Thirty-one patients (age: 61±12 years) with cancer received HT in the thoracic or upper abdominal regions using an 8-MHz radiofrequency-capacitive-device for 50 min...
January 16, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28092496/the-effect-of-contrast-material-on-radiation-dose-at-ct-part-i-incorporation-of-contrast-material-dynamics-in-anthropomorphic-phantoms
#4
Pooyan Sahbaee, W Paul Segars, Daniele Marin, Rendon C Nelson, Ehsan Samei
Purpose To develop a method to incorporate the propagation of contrast material into computational anthropomorphic phantoms for estimation of organ dose at computed tomography (CT). Materials and Methods A patient-specific physiologically based pharmacokinetic (PBPK) model of the human cardiovascular system was incorporated into 58 extended cardiac-torso (XCAT) patient phantoms. The PBPK model comprised compartmental models of vessels and organs unique to each XCAT model. For typical injection protocols, the dynamics of the contrast material in the body were described according to a series of patient-specific iodine mass-balance differential equations, the solutions to which provided the contrast material concentration time curves for each compartment...
January 13, 2017: Radiology
https://www.readbyqxmd.com/read/28088909/synergistic-interaction-between-heme-oxygenase-ho-and-nuclear-factor-e2-related-factor-2-nrf2-against-oxidative-stress-in-cardiovascular-related-diseases
#5
Joseph Fomusi Ndisang
BACKGROUND: Nuclear factor-erythroid related factor-2 (Nrf2) is a master regulator of transcriptional activation of anti-oxidants in cells. Similarly, heme oxygenase (HO) is a cytoprotective protein with anti-oxidant effects. This review article will shed more light on the interaction between Nrf2 and HO. METHODS AND RESULTS: A PubMed search was done for recent articles on Nrf2 and HO. These studies suggested that under normal physiological conditions, Nrf2 is bound within the cytoplasm to its repressor, Kelch-like ECH-associated protein (Keap1), an oxidative stress sensor...
January 13, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28088483/physiology-recording-with-magnetic-field-probes-for-fmri-denoising
#6
Simon Gross, Laetitia Vionnet, Lars Kasper, Benjamin E Dietrich, Klaas P Pruessmann
Physiological noise originating in cardiovascular and respiratory processes is a substantial confound in BOLD fMRI. When unaccounted for it reduces the temporal SNR and causes error in inferred brain activity and connectivity. Physiology correction typically relies on auxiliary measurements with peripheral devices such as ECG, pulse oximeters, and breathing belts. These require direct skin contact or at least a tight fit, impairing subject comfort and adding to the setup time. In this work, we explore a touch-free alternative for physiology recording, using magnetic detection with NMR field probes...
January 11, 2017: NeuroImage
https://www.readbyqxmd.com/read/28087676/the-longitudinal-study-of-aging-in-human-young-adults-knowledge-gaps-and-research-agenda
#7
Terrie E Moffitt, Daniel W Belsky, Andrea Danese, Richie Poulton, Avshalom Caspi
BACKGROUND: To prevent onset of age-related diseases and physical and cognitive decline, interventions to slow human aging and extend health span must eventually be applied to people while they are still young and healthy. Yet most human aging research examines older adults, many with chronic disease, and little is known about aging in healthy young humans. METHOD: This article explains how this knowledge gap is a barrier to extending health span and puts forward the case that geroscience should invest in researching the pace of aging in young adults...
February 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28087575/treating-inflammation-and-infection-in-the-21st-century-new-hints-from-decoding-resolution-mediators-and-mechanisms
#8
REVIEW
Charles N Serhan
Practitioners of ancient societies from the time of Hippocrates and earlier recognized and treated the signs of inflammation, heat, redness, swelling, and pain with agents that block or inhibit proinflammatory chemical mediators. More selective drugs are available today, but this therapeutic concept has not changed. Because the acute inflammatory response is host protective to contain foreign invaders, much of today's pharmacopeia can cause serious unwanted side effects, such as immune suppression. Uncontrolled inflammation is now considered pathophysiologic and is associated with many widely occurring diseases such as cardiovascular disease, neurodegenerative diseases, diabetes, obesity, and asthma, as well as classic inflammatory diseases (e...
January 13, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28087126/cardiac-lymphatics-a-new-avenue-for-therapeutics
#9
REVIEW
Taina Vuorio, Annakaisa Tirronen, Seppo Ylä-Herttuala
Recent progress in lymphatic vessel biology and in novel imaging techniques has established the importance of the lymphatic vasculature as part of the cardiovascular system. The lymphatic vessel network regulates many physiological processes important for heart function such as fluid balance, transport of extravasated proteins, and trafficking of immune cells. Therefore, lymphangiogenic therapy could be beneficial in the treatment of cardiovascular diseases, for example by improving reverse cholesterol transport (RCT) from atherosclerotic lesions or by resolving edema and fibrosis after myocardial infarction...
January 10, 2017: Trends in Endocrinology and Metabolism: TEM
https://www.readbyqxmd.com/read/28080102/not-just-sticks-and-stones-indirect-ethnic-discrimination-leads-to-greater-physiological-reactivity
#10
Virginia W Huynh, Que-Lam Huynh, Mary-Patricia Stein
OBJECTIVES: We examined the effect of indirect ethnic discrimination on physiological reactivity (i.e., cortisol, blood pressure, heart rate) in Latino emerging adults. METHOD: Participants (N = 32) were randomly assigned to be exposed to indirect ethnic discrimination (experimental condition) or not (control condition) while undergoing a cognitive stress task. RESULTS: Greater total cortisol output was observed in participants in the experimental condition, relative to those in the control condition...
January 12, 2017: Cultural Diversity & Ethnic Minority Psychology
https://www.readbyqxmd.com/read/28079528/assessing-the-evolution-of-redundancy-synergy-of-spontaneous-variability-regulation-with-age
#11
Alberto Porta, Vlasta Bari, Beatrice De Maria, Natália Maria Perseguini, Juliana Milan, Patricia Rehder-Santos, Vinícius Minatel, Anielle Takahashi, Aparecida Catai
We exploited a model-based Wiener-Granger causality method in the information domain for the evaluation of the transfer entropy (TE) and interaction TE (ITE), the latter taken as a measure of the net balance between redundancy and synergy, to describe the interactions between the spontaneous variability of heart period (HP) and systolic arterial pressure (SAP) and the effect of respiration (R) on both variables. Cardiac control was typified via the genuine TE from SAP to HP, that from R to HP, and the ITE from SAP and R to HP, while vascular control was characterized via the genuine TE from HP to SAP, that from R to SAP, and the ITE from HP and R to SAP...
January 12, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28078981/resilience-to-alzheimer-s-disease-the-role-of-physical-activity
#12
Pedrinolla Anna, Schena Federico, Venturelli Massimo
BACKGROUND: Although Alzheimer's disease (AD) is a neurodegenerative pathology characterized by accumulation of β-amyloid plaques and neurofibrillary tangles at cerebral level, recent studies highlighted that AD might be the result of many altered physiological processes occurring at whole-organism level. The ability to adapt to stressors by "bending" but not "breaking" can be considered as "resilience". Individuals incline to withstand such pathophysiological challenges, can be considered more resilient than those that do not...
January 11, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28077863/what-have-human-experimental-overfeeding-studies-taught-us-about-adipose-tissue-expansion-and-susceptibility-to-obesity-and-metabolic-complications
#13
REVIEW
D J Cuthbertson, T Steele, J P Wilding, J C G Halford, J A Harrold, M Hamer, F Karpe
Overfeeding experiments, in which we impose short-term positive energy balance, help unravel the cellular, physiological and behavioural adaptations to nutrient excess. These studies mimic longer-term mismatched energy expenditure and intake. There is considerable inter-individual heterogeneity in the magnitude of weight gain when exposed to similar relative caloric excess reflecting variable activation of compensatory adaptive mechanisms. Significantly, given similar relative weight gain, individuals may be protected from/predisposed to metabolic complications (insulin resistance, dyslipidaemia, hypertension), non-alcoholic fatty liver disease and cardiovascular disease...
January 12, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28075340/bioactive-nutrients-and-nutrigenomics-in-age-related-diseases
#14
REVIEW
Tania Rescigno, Luigina Micolucci, Mario F Tecce, Anna Capasso
The increased life expectancy and the expansion of the elderly population are stimulating research into aging. Aging may be viewed as a multifactorial process that results from the interaction of genetic and environmental factors, which include lifestyle. Human molecular processes are influenced by physiological pathways as well as exogenous factors, which include the diet. Dietary components have substantive effects on metabolic health; for instance, bioactive molecules capable of selectively modulating specific metabolic pathways affect the development/progression of cardiovascular and neoplastic disease...
January 8, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28074412/a-scientific-rationale-to-improve-resistance-training-prescription-in-exercise-oncology
#15
Ciaran M Fairman, Michael C Zourdos, Eric R Helms, Brian C Focht
To date, the prevailing evidence in the field of exercise oncology supports the safety and efficacy of resistance training to attenuate many oncology treatment-related adverse effects, such as risk for cardiovascular disease, increased fatigue, and diminished physical functioning and quality of life. Moreover, findings in the extant literature supporting the benefits of exercise for survivors of and patients with cancer have resulted in the release of exercise guidelines from several international agencies...
January 10, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28073429/relation-of-the-myocardial-contraction-fraction-as-calculated-from-m-mode-echocardiography-with-incident-heart-failure-atherosclerotic-cardiovascular-disease-and-mortality-results-from-the-cardiovascular-health-study
#16
Mathew S Maurer, William J H Koh, Traci M Bartz, Sirish Vullaganti, Eddy Barasch, Julius M Gardin, John S Gottdiener, Bruce M Psaty, Jorge R Kizer
We evaluated the association between 2-dimensional (2D) echocardiography (echo)-determined myocardial contraction fraction (MCF) and adverse cardiovascular outcomes including incident heart failure (HF), atherosclerotic cardiovascular disease (ASCVD), and mortality. The MCF, the ratio of left ventricular (LV) stroke volume (SV) to myocardial volume (MV), is a volumetric measure of myocardial shortening that can distinguish pathologic from physiological hypertrophy. Using 2D echo-guided M-mode data from the Cardiovascular Health Study, we calculated MCF in subjects with LV ejection fraction (EF) ≥55% and used Cox models to evaluate its association with incident HF, ASCVD, and all-cause mortality after adjusting for clinical and echo parameters...
December 18, 2016: American Journal of Cardiology
https://www.readbyqxmd.com/read/28073290/intra-and-interorgan-communication-in-the-cardiovascular-system-a-special-view-on-redox-regulation
#17
Axel Gödecke, Judith Haendeler
Intraorgan communication in the cardiovascular system is exerted by direct cell-cell contacts, but also by locally released factors, which modulate neighboring cells by paracrine signals (e.g. NO, vascular endothelial growth factor, adenosine, reactive oxygen species (ROS)). Moreover, cells in close proximity to the typical cardiovascular cells such as fibroblasts, red blood cells, as well as resident and invading immune cells must be considered in attempts to understand cardiovascular function in physiology and pathology...
January 10, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28072745/safety-and-efficacy-of-chloral-hydrate-for-conscious-sedation-of-infants-in-the-pediatric-cardiovascular-intensive-care-unit
#18
Mei-Lian Chen, Qiang Chen, Fan Xu, Jia-Xin Zhang, Xiao-Ying Su, Xiao-Zhen Tu
This study evaluates the safety and efficacy of chloral hydrate administration for the conscious sedation of infants in the pediatric cardiovascular intensive care unit (PCICU).We conducted a retrospective review of the charts of 165 infants with congenital heart disease who received chloral hydrate in our PCICU between January 2014 and December 2014. Chloral hydrate was administered orally or rectally to infants using doses of 50 mg/kg. We collected and analyzed relevant clinical parameters.The overall length of time to achieve sedation was ranged from 5 to 35 min (10...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28071785/bioactive-polyphenols-and-cardiovascular-disease-chemical-antagonists-pharmacological-agents-or-xenobiotics-that-drive-an-adaptive-response
#19
REVIEW
Katarzyna Goszcz, Garry G Duthie, Derek Stewart, Stephen J Leslie, Ian L Megson
Polyphenols are widely regarded to have a wide range of health-promoting qualities, including in the sphere of cardiovascular disease. Historically, the benefits have been linked to their well-recognised powerful antioxidant activity. However, the concept that the beneficial effects are attributable to direct antioxidant activity in vivo does not pay sufficient heed to the fact that polyphenols degrade rapidly, are poorly absorbed and rapidly metabolised, resulting in very low bioavailability. This review explores alternative mechanisms by which polyphenols, or their metabolites, exert biological activity via mechanisms that can be activated by physiologically relevant concentrations...
January 10, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28070330/the-approximated-cardiovascular-reserve-index-complies-with-haemorrhage-related-hemodynamic-deterioration-pattern-a-swine-exsanguination-model
#20
Roy Nadler, Elon Glassberg, Itay E Gabbay, Linn Wagnert-Avraham, Gal Yaniv, David Kushnir, Arik Eisenkraft, Ben-Zion Bobrovsky, Uri Gabbay
BACKGROUND: To estimate the cardiovascular reserve we formulated the Cardiovascular Reserve Index (CVRI) based on physiological measurements. The aim of this study was to evaluate the pattern of CVRI in haemorrhage-related haemodynamic deterioration in an animal model simulating combat injury. METHODS: Data were collected retrospectively from a research database of swine exsanguination model in which serial physiological measurements were made under anesthesia in 12 swine of haemorrhagic injury and 5 controls...
February 2017: Annals of Medicine and Surgery
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