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https://www.readbyqxmd.com/read/28161438/molecular-and-evolutionary-perspectives-of-the-renin-angiotensin-system-from-lamprey
#1
Marty K S Wong, Yoshio Takei
The recent advance and revision on the renin-angiotensin system in lamprey were summarized and we emphasized that presence of two types of angiotensins (Angs) in lamprey. Due to the parasitic nature on fish blood, teleost-type Angs were produced in their buccal gland and secreted into the lamphredin to evade the host immunorejection. A native lamprey angiotensinogen (AGT) was identified in genome and it retains serine-protease inhibitor activity for thrombin that regulates the blood coagulation pathway. The native lamprey angiotensin II (Lp-Ang II) is hypotensive instead of hypertensive, suggesting a functional divergence on cardiovascular regulation from the main vertebrate groups...
February 2, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28142121/the-role-of-dietary-polyphenols-in-the-management-of-erectile-dysfunction-mechanisms-of-action
#2
REVIEW
Chinedum Eleazu, Nwite Obianuju, Kate Eleazu, Winner Kalu
The incidence of erectile dysfunction (ED) is on the increase and it is estimated that it will affect about 322 million men globally by the year 2025 if adequate measures are not taken to curb it. Natural polyphenols in plant based diets have gained public interest in recent times due to their roles in the prevention of various disease that implicate free radicals/reactive oxygen species and recently on ED. However, the role of polyphenols in the management of ED has not been explored due perhaps to limited data available...
January 28, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28123076/cardiovascular-disease-in-cancer-survivors
#3
REVIEW
Tochi M Okwuosa, Sarah Anzevino, Ruta Rao
Certain cancer therapies, including radiation therapy and some types of chemotherapies, are associated with increased risk of cardiovascular disease (CVD) and events. Some of these effects such as those presented by anthracyclines, radiation therapy, cisplatin, as well as those presented by hormone therapy for breast cancer-usually taken for many years for some breast and prostate cancers-are long-lasting and associated with cardiovascular events risk more than 20 years after cancer treatment. Cardiovascular testing, diagnostic assessment of suspected cardiovascular symptomatology, as well as laboratory tests for CVD risk factors are imperative...
February 2017: Postgraduate Medical Journal
https://www.readbyqxmd.com/read/28065681/mid-regional-pro-adrenomedullin-in-patients-with-acute-dyspnea-data-from-the-akershus-cardiac-examination-ace-2-study
#4
Mohammad Osman Pervez, Magnus Nakrem Lyngbakken, Peder Langeland Myhre, Jon Brynildsen, Eva Camilla Langsjøen, Arne Didrik Høiseth, Geir Christensen, Torbjørn Omland, Helge Røsjø
BACKGROUND: Mid-regional pro-adrenomedullin (MR-proADM) is a surrogate marker for adrenomedullin; a hormone that attenuates myocardial remodeling. Accordingly, we hypothesized that MR-proADM could provide diagnostic and prognostic information in patients with acute dyspnea. METHODS AND RESULTS: We measured MR-proADM by a commercial ELISA on hospital admission in 311 patients with acute dyspnea and compared the utility of MR-proADM with N-terminal pro-B-type natriuretic peptide (NT-proBNP)...
January 5, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/27992423/angiotensin-converting-enzyme-regulates-cell-proliferation-and-migration
#5
Erika Costa de Alvarenga, Matheus de Castro Fonseca, Clarissa Coelho Carvalho, Rodrigo Machado Florentino, Andressa França, Eveline Matias, Paola Bianchi Guimarães, Carolina Batista, Valder Freire, Adriana Karaoglanovic Carmona, João Bosco Pesquero, Ana Maria de Paula, Giselle Foureaux, Maria de Fatima Leite
BACKGROUND: The angiotensin-I converting enzyme (ACE) plays a central role in the renin-angiotensin system, acting by converting the hormone angiotensin-I to the active peptide angiotensin-II (Ang-II). More recently, ACE was shown to act as a receptor for Ang-II, and its expression level was demonstrated to be higher in melanoma cells compared to their normal counterparts. However, the function that ACE plays as an Ang-II receptor in melanoma cells has not been defined yet. AIM: Therefore, our aim was to examine the role of ACE in tumor cell proliferation and migration...
2016: PloS One
https://www.readbyqxmd.com/read/27905115/treatment-for-hereditary-angioedema-with-normal-c1-inh-and-specific-mutations-in-the-f12-gene-hae-fxii
#6
K Bork, K Wulff, G Witzke, J Hardt
Hereditary angioedema with normal C1 esterase inhibitor and mutations in the F12 gene (HAE-FXII) is associated with skin swellings, abdominal pain attacks, and the risk of asphyxiation due to upper airway obstruction. It occurs nearly exclusively in women. We report our experience treating HAE-FXII with discontinuation of potential trigger factors and drug therapies. The study included 72 patients with HAE-FXII. Potential triggers included estrogen-containing oral contraceptives (eOC), hormonal replacement therapy, or angiotensin-converting enzyme inhibitors...
November 6, 2016: Allergy
https://www.readbyqxmd.com/read/27881412/renin-angiotensin-aldosterone-system-inhibitors-improve-membrane-stability-and-change-gene-expression-profiles-in-dystrophic-skeletal-muscles
#7
Jessica A Chadwick, Sayak Bhattacharya, Jeovanna Lowe, Noah Weisleder, Jill A Rafael-Fortney
Angiotensin-converting enzyme inhibitors (ACEi) and mineralocorticoid receptor (MR) antagonists are FDA-approved drugs that inhibit the renin-angiotensin-aldosterone system (RAAS) and are used to treat heart failure. Combined treatment with the ACEi lisinopril and the nonspecific MR antagonist spironolactone surprisingly improves skeletal muscle, in addition to heart function and pathology in a Duchenne muscular dystrophy (DMD) mouse model. We recently demonstrated that MR is present in all limb and respiratory muscles and functions as a steroid hormone receptor in differentiated normal human skeletal muscle fibers...
February 1, 2017: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/27872236/preclinical-and-early-clinical-profile-of-a-highly-selective-and-potent-oral-inhibitor-of-aldosterone-synthase-cyp11b2
#8
Katrijn Bogman, Dietmar Schwab, Marie-Laure Delporte, Giuseppe Palermo, Kurt Amrein, Susanne Mohr, Maria Cristina De Vera Mudry, Morris J Brown, Philippe Ferber
: Primary hyperaldosteronism is a common cause of resistant hypertension. Aldosterone is produced in the adrenal by aldosterone synthase (AS, encoded by the gene CYP11B2). AS shares 93% homology to 11β-hydroxylase (encoded by the gene CYP11B1), responsible for cortisol production. This homology has hitherto impeded the development of a drug, which selectively suppresses aldosterone but not cortisol production, as a new treatment for primary hyperaldosteronism. We now report the development of RO6836191 as a potent (Ki 13 nmol/L) competitive inhibitor of AS, with in vitro selectivity >100-fold over 11β-hydroxylase...
January 2017: Hypertension
https://www.readbyqxmd.com/read/27865700/adhesion-ability-of-angiotensin-ii-with-model-membranes
#9
Julia Preu, Louis Tiefenauer, Thomas Gutberlet
The octa-peptide angiotensin II (Ang II, (H2NAspArgValTyrIleHisProPheCOOH)) is one of the key player on blood pressure regulation in mammals. Predominantly binding to the Angiotensin type 1 and 2 receptors, the hormone is one of several peptide ligands binding to G protein coupled receptors (GPCR). The active hormone derives from a high molecular weight precursor sequentially cleaved by the proteases renin and the angiotensin converting enzyme (ACE). The chemical nature of the amino acid sequence has an impact on the behavior in the proximity of membranes, demonstrated using different membrane model systems and biophysical methods...
February 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27846041/factors-affecting-the-sensitivity-of-tc-99m-methoxyisobutylisonitrile-dual-phase-parathyroid-single-photon-emission-computed-tomography-in-primary-hyperparathyroidism
#10
Mine Araz, Derya Çayir, Mehmet Erdoğan, Bekir Uçan, Erman Çakal
OBJECTIVE: The aim of this study was to investigate the effects of thyroid diseases and regularly used medications on the sensitivity of Tc-99m methoxyisobutylisonitrile (MIBI) dual-phase parathyroid single photon emission computed tomography (SPECT) and to define indicatives of the result of the study. PATIENTS AND METHODS: Overall, 218 primary hyperparathyroidism patients (190 women, 28 men, mean age: 57±14 years) with thyroid-parathyroid ultrasonography and Tc-99m MIBI dual-phase parathyroid SPECT were retrospectively enrolled...
February 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/27837351/biomanufacturing-history-and-perspective
#11
REVIEW
Yi-Heng Percival Zhang, Jibin Sun, Yanhe Ma
Biomanufacturing is a type of manufacturing that utilizes biological systems (e.g., living microorganisms, resting cells, animal cells, plant cells, tissues, enzymes, or in vitro synthetic (enzymatic) systems) to produce commercially important biomolecules for use in the agricultural, food, material, energy, and pharmaceutical industries. History of biomanufacturing could be classified into the three revolutions in terms of respective product types (mainly), production platforms, and research technologies...
November 11, 2016: Journal of Industrial Microbiology & Biotechnology
https://www.readbyqxmd.com/read/27834291/sex-differences-in-the-metabolic-dysfunction-and-insulin-resistance-of-skeletal-muscle-glucose-transport-following-high-fructose-ingestion
#12
Yupaporn Rattanavichit, Natsasi Chukijrungroat, Vitoon Saengsirisuwan
The role of high fructose ingestion (HFI) in the development of conditions mimicking human metabolic syndrome has mostly been demonstrated in male animals; however, the extent of HFI-induced metabolic alterations in females remains unclear. The present study investigated whether HFI-induced metabolic perturbations differ between sexes and whether HFI aggravates the metabolic disturbances under ovarian hormone deprivation. Male, female, and ovariectomized (OVX) Sprague-Dawley rats were given either water or liquid fructose (10% wt/vol) for 6 wk...
December 1, 2016: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/27822449/similar-efficacy-from-specific-and-non-specific-mineralocorticoid-receptor-antagonist-treatment-of-muscular-dystrophy-mice
#13
Jeovanna Lowe, Kyle T Floyd, Neha Rastogi, Eric J Schultz, Jessica A Chadwick, Sarah A Swager, Jonathan G Zins, Feni K Kadakia, Suzanne Smart, Elise P Gomez-Sanchez, Celso E Gomez-Sanchez, Subha V Raman, Paul M L Janssen, Jill A Rafael-Fortney
BACKGROUND: Combined treatment with an angiotensin-converting enzyme inhibitor and a mineralocorticoid receptor (MR) antagonist improved cardiac and skeletal muscle function and pathology in a mouse model of Duchenne muscular dystrophy. MR is present in limb and respiratory skeletal muscles and functions as a steroid hormone receptor. OBJECTIVE: The goals of the current study were to compare the efficacy of the specific MR antagonist eplerenone with the non-specific MR antagonist spironolactone, both in combination with the angiotensin-converting enzyme inhibitor lisinopril...
2016: Journal of Neuromuscular Diseases
https://www.readbyqxmd.com/read/27776734/preadolescent-adversity-programs-a-disrupted-maternal-stress-reactivity%C3%A2-in-humans-and-mice
#14
Kathleen E Morrison, C Neill Epperson, Mary D Sammel, Grace Ewing, Jessica S Podcasy, Liisa Hantsoo, Deborah R Kim, Tracy L Bale
BACKGROUND: Adverse childhood experiences (ACEs) are one of the greatest predictors of affective disorders for women. Periods of dynamic hormonal flux, including pregnancy, exacerbate the risk for affective disturbance and promote hypothalamic-pituitary-adrenal (HPA) axis dysregulation, a key feature of affective disorders. Little is understood as to how stress experienced in late childhood, defined as preadolescence, alters the programming unique to this period of brain maturation and its interaction with the hormonal changes of pregnancy and postpartum...
August 26, 2016: Biological Psychiatry
https://www.readbyqxmd.com/read/27766748/chronic-heart-failure-as-a-state-of-reduced-effectiveness-of-the-natriuretic-peptide-system-implications-for-therapy
#15
REVIEW
Javier Díez
Natriuretic peptides (NPs) promote diuresis, natriuresis and vasodilation in early chronic heart failure (CHF), countering renin-angiotensin-aldosterone system (RAAS) and sympathetic nervous system (SNS) overstimulation. Despite dramatic increases in circulating NP concentrations as CHF progresses, their effects become blunted. Increases in diuresis, natriuresis, and vasodilation after administration of exogenous atrial (ANP) or brain (BNP) natriuretic peptides are attenuated in patients with advanced CHF compared with controls...
February 2017: European Journal of Heart Failure
https://www.readbyqxmd.com/read/27763560/renal-protective-effects-of-17%C3%AE-estradiol-on-mice-with-acute-aristolochic-acid-nephropathy
#16
Min Shi, Liang Ma, Li Zhou, Ping Fu
Aristolochic acid nephropathy (AAN) is a progressive kidney disease caused by a Chinese herb containing aristolochic acid. Excessive death of renal tubular epithelial cells (RTECs) characterized the acute phase of AAN. Therapies for acute AAN were limited, such as steroids and angiotensin-receptor blockers (ARBs)/angiotensin-converting enzyme inhibitors (ACEIs). It was interesting that, in acute AAN, female patients showed relative slower progression to renal failure than males. In a previous study, female hormone 17β-estradiol (E2) was found to attenuate renal ischemia-reperfusion injury...
October 18, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27754186/sp-04-1-the-role-of-natriuretic-peptides-in-the-pathogenesis-of-cardiovascular-diseases
#17
Zhanna Kobalava
The burden of cardiovascular diseases (CVD) in general and heart failure (HF) in particular continues to increase worldwide. CVD are major contributors to death and morbidity and recognized as important drivers of healthcare expenditure. Chronic overactivity of the renin-angiotensin-aldosterone system (RAAS) plays a key role in human hypertension and HF pathophysiology. RAAS is fundamental in the overall regulation of cardiovascular homeostasis through the actions of hormones, which regulate vascular tone, and specifically blood pressure through vasoconstriction and renal sodium and water retention...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27730378/diagnostic-value-of-blood-tests-for-occult-causes-of-initially-idiopathic-small-fiber-polyneuropathy
#18
Magdalena Lang, Roi Treister, Anne Louise Oaklander
Small-fiber polyneuropathy (SFPN) causes non-specific symptoms including chronic pain, cardiovascular, gastrointestinal, and sweating complaints. Diagnosis is made from history and exam in patients with known risk factors such as diabetes, but objective test confirmation is recommended for patients without known risks. If tests confirm SFPN, and it is "initially idiopathic" (iiSFPN), screening for occult causes is indicated. This study's aim was to evaluate the 21 widely available, recommended blood tests to identify the most cost-effective ones and to learn about occult causes of iiSFPN...
December 2016: Journal of Neurology
https://www.readbyqxmd.com/read/27668644/the-renin-angiotensin-aldosterone-system-raas-physiology-and-molecular-mechanisms-of-functioning
#19
Monika Chaszczewska-Markowska, Maria Sagan, Katarzyna Bogunia-Kubik
Secretion of renin juxtaglomerular cells into bloodstream initiates activation of an enzymatic-hormonal cascade known as the RAAS (renin - angiotensin - aldosterone system). As a result, blood pressure is increased by the means several interrelated mechanisms. Mechanism of Zjednoczoaction of this system has been known for decades, but a few previously unknown components were recently added, such as ACE-2 and Ang(1-7), and their role often seems to be opposite to that of the conventional components. Local tissue systems also have important biological functions...
September 13, 2016: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/27649628/neprilysin-is-a-mediator-of-alternative-renin-angiotensin-system-activation-in-the-murine-and-human-kidney
#20
Oliver Domenig, Arndt Manzel, Nadja Grobe, Eva Königshausen, Christopher C Kaltenecker, Johannes J Kovarik, Johannes Stegbauer, Susan B Gurley, Dunja van Oyen, Marlies Antlanger, Michael Bader, Daisy Motta-Santos, Robson A Santos, Khalid M Elased, Marcus D Säemann, Ralf A Linker, Marko Poglitsch
Cardiovascular and renal pathologies are frequently associated with an activated renin-angiotensin-system (RAS) and increased levels of its main effector and vasoconstrictor hormone angiotensin II (Ang II). Angiotensin-converting-enzyme-2 (ACE2) has been described as a crucial enzymatic player in shifting the RAS towards its so-called alternative vasodilative and reno-protective axis by enzymatically converting Ang II to angiotensin-(1-7) (Ang-(1-7)). Yet, the relative contribution of ACE2 to Ang-(1-7) formation in vivo has not been elucidated...
2016: Scientific Reports
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