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https://www.readbyqxmd.com/read/28747387/molecular-characteristics-of-the-kcnj5-mutated-aldosterone-producing-adenomas
#1
Masanori Murakami, Takanobu Yoshimoto, Kazuhiko Nakabayashi, Yujiro Nakano, Takahiro Fukaishi, Kyoichiro Tsuchiya, Isao Minami, Ryotaro Bouchi, Kohji Okamura, Yasuhisa Fujii, Koshi Hashimoto, Ken-Ichiro Hata, Kazunori Kihara, Yoshihiro Ogawa
The pathophysiology of aldosterone-producing adenomas (APAs) has been investigated via genetic approaches and the pathogenic significance of a series of somatic mutations, including KCNJ5, has been uncovered. However, how the mutational status of an APA is associated with its molecular characteristics, including its transcriptome and methylome, has not been fully understood. This study was undertaken to explore the molecular characteristics of APAs, specifically focusing on APAs with KCNJ5 mutations as opposed to those without KCNJ5 mutations, by comparing their transcriptome and methylome status...
July 26, 2017: Endocrine-related Cancer
https://www.readbyqxmd.com/read/28747362/alterations-of-adrenal-steroidomic-profiles-in-preterm-infants-at-birth
#2
Simon Travers, Laetitia Martinerie, Pascal Boileau, Marc Lombès, Eric Pussard
OBJECTIVE: Preterm infants have relative adrenal and kidney immaturity. Recently, we linked their urine sodium loss to a hypoaldosteronism at variance with an appropriate stimulation of the renin-angiotensin system. To investigate this defective aldosterone secretion, we analyse the biosynthesis pathways of adrenal steroids in neonates according to gestational age (GA). DESIGN: Multicentre study (Premaldo) including 152 neonates classified into three groups: group 1 (very preterm (VPT)): <33 ‰gestational weeks (GW); group 2 (preterm (PT)): 33-36 GW and group 3 (term (T)): ≥37 GW...
July 26, 2017: Archives of Disease in Childhood. Fetal and Neonatal Edition
https://www.readbyqxmd.com/read/28747358/urinary-renin-angiotensin-markers-in-polycystic-kidney-disease
#3
Mahdi Salih, Dominique M Bovee, Lodi C W Roksnoer, Niek F Casteleijn, Stephan J L Bakker, Ronald T Gansevoort, Robert Zietse, A H Jan Danser, Ewout J Hoorn
In autosomal dominant polycystic kidney disease (ADPKD) activation of the renin-angiotensin aldosterone system (RAAS) may contribute to hypertension and disease progression. Although previous studies focused on circulating RAAS-components, preliminary evidence suggests APDKD may increase urinary RAAS-components. Therefore, our aim was to analyze circulating and urinary RAAS-components in ADPKD. We cross-sectionally compared 60 patients with ADPKD to 57 patients with non-ADPKD chronic kidney disease (CKD). The two groups were matched by gender, estimated glomerular filtration rate (eGFR), blood pressure, and RAAS-inhibitor use...
July 26, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28746811/the-acute-effects-of-different-spironolactone-doses-on-cardiac-function-in-streptozotocin-induced-diabetic-rats
#4
Aleksandra Vranic, Stefan Simovic, Petar Ristic, Tamara R Nikolic, Isidora Stojic, Ivan M Srejovic, Vladimir I Zivkovic, Vladimir Jakovljevic, Dusan Djuric
Currently, cardiovascular diseases are leading cause of global mortality, while diabetes mellitus remains an important cause of cardiovascular morbidity. Findings suggest that obesity and diabetes mellitus are closely interconnected with high aldosterone levels, while mineralocorticoid receptors antagonist therapy has shown positive effects on cardiovascular complications associated with diabetes mellitus. A recent study showed that patients with diabetes mellitus treated with mineralocorticoid receptors antagonist have improved coronary microvascular function, leading to improved diastolic dysfunction...
July 26, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28745696/-obesity-related-glomerulopathy-mechanisms-of-development-clinical-course
#5
REVIEW
I M Kutyrina
Obesity and overweight are recognized as epidemics of non-communicable diseases in the 21st century. The kidneys are a target organ for obesity, damage to which is considered to be an independent risk factor for the development of renal failure. Obesity-related glomerulopathy (OGP) is one of the types of renal injury in obesity, which is characterized by the development of proteinuria in patients with a body mass index (BMI) of >30 kg/m2 in the absence of other causes of kidney damage. The pathogenesis of OGP is multifactorial...
2017: Terapevticheskiĭ Arkhiv
https://www.readbyqxmd.com/read/28744758/gitelman-syndrome-an-analysis-of-the-underlying-pathophysiologic-mechanisms-of-acid-base-and-electrolyte-abnormalities
#6
REVIEW
T D Filippatos, C V Rizos, E Tzavella, M S Elisaf
Gitelman syndrome is the most common inherited tubular disease resulting from mutations of the SLC12A3 gene that encodes the thiazide-sensitive sodium-chloride cotransporter in the early distal convoluted tubules. The review presents the underlying pathophysiologic mechanisms of acid-base and electrolyte abnormalities observed in patients with Gitelman syndrome. The syndrome is usually characterized by hypokalemic metabolic alkalosis in combination with hypomagnesemia and hypocalciuria. Additionally, increased chloride excretion and renin/aldosterone levels, hypophosphatemia (occasionally), hyponatremia (rarely) and glucose intolerance/insulin resistance have been reported...
July 25, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/28744670/rna-binding-protein-hur-enhances-mineralocorticoid-signaling-in-renal-kc3ac1-cells-under-hypotonicity
#7
Ingrid Lema, Larbi Amazit, Khadija Lamribet, Jérôme Fagart, Anne Blanchard, Marc Lombès, Nadia Cherradi, Say Viengchareun
Mineralocorticoid receptor (MR) mediates the sodium-retaining action of aldosterone in the distal nephron. Herein, we decipher mechanisms by which hypotonicity increases MR expression in renal principal cells. We identify HuR (human antigen R), an mRNA-stabilizing protein, as an important posttranscriptional regulator of MR expression. Hypotonicity triggers a rapid and reversible nuclear export of HuR in renal KC3AC1 cells, as quantified by high-throughput microscopy. We also identify a key hairpin motif in the 3'-untranslated region of MR transcript, pivotal for the interaction with HuR and its stabilizing function...
July 25, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28739810/aldosterone-in-advancing-age-don-t-shoot-the-messenger
#8
EDITORIAL
John W Funder
No abstract text is available yet for this article.
July 25, 2017: Circulation
https://www.readbyqxmd.com/read/28739510/differential-proteomics-reveals-s100-a11-as-a-key-factor-in-aldosterone-induced-collagen-expression-in-human-cardiac-fibroblasts
#9
Ernesto Martínez-Martínez, Jaime Ibarrola, Mercedes Lachén-Montes, Amaya Fernández-Celis, Frederic Jaisser, Enrique Santamaria, Joaquín Fernández-Irigoyen, Natalia López-Andrés
Aldosterone (Aldo) could induce cardiac fibrosis, a hallmark of heart disease. Aldo direct effects on collagen production in cardiac fibroblasts remain controversial. Our aim is to characterize changes in the proteome of adult human cardiac fibroblasts treated with Aldo to identify new proteins altered that might be new therapeutic targets in cardiovascular diseases. Aldo increased collagens expressions in human cardiac fibroblasts. Complementary, using a quantitative proteomic approach, 30 proteins were found differentially expressed between control and Aldo-treated cardiac fibroblasts...
July 21, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28739050/reduced-water-intake-deteriorates-glucose-regulation-in-patients-with-type-2-diabetes
#10
Evan C Johnson, Costas N Bardis, Lisa T Jansen, J D Adams, Tracie W Kirkland, Stavros A Kavouras
Epidemiological research has demonstrated that low daily total water intake is associated with increased diagnosis of hyperglycemia. Possible mechanisms for this increase include hormones related to the hypothalamic pituitary axis as well as the renin-angiotensin-aldosterone system (RAAS). Therefore, the hypothesis of the present study was that acute low water intake would result in differential hormonal profiles and thus impaired blood glucose regulation during an oral glucose tolerance test (OGTT) in people with type 2 diabetes mellitus (T2DM)...
July 2017: Nutrition Research
https://www.readbyqxmd.com/read/28738355/impact-of-renin-angiotensin-aldosterone-system-inhibition-on-serum-potassium-levels-among-peritoneal-dialysis-patients
#11
Silvia Carreira Ribeiro, Ana Elizabeth Figueiredo, Pasqual Barretti, Roberto Pecoits-Filho, Thyago Proença de Moraes
BACKGROUND: The chronic use of angiotensin-converting enzyme inhibitors or angiotensin II receptor blocker has been associated with hyperkalemia in patients with reduced renal function even after the initiation of hemodialysis. Whether such medications may cause a similar effect in peritoneal dialysis patients is not well established. So, the aim of our study was to analyze the impact of renin-angiotensin-aldosterone inhibitors on the serum levels of potassium in a national cohort of peritoneal dialysis patients...
July 22, 2017: American Journal of Nephrology
https://www.readbyqxmd.com/read/28737999/effect-of-laparotomy-on-the-pituitary-adrenal-axis-in-dogs
#12
Emily J Skovira, Ellen N Behrend, Linda G Martin, Lee E Palmer, Robert J Kemppainen, Hollie P Lee
OBJECTIVE To assess effects of major abdominal surgery on serum cortisol and aldosterone and plasma canine ACTH (cACTH) concentrations. ANIMALS 39 healthy dogs undergoing laparotomy during veterinary student surgical laboratories. PROCEDURES Blood samples were obtained before and at completion of surgery. Serum cortisol and aldosterone and plasma cACTH concentrations were measured by use of validated radioimmunoassays. Changes in concentrations (postoperative concentration minus preoperative concentration) were calculated...
August 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28737438/prenatal-exposure-to-angiotensin-ii-increases-blood-pressure-and-decreases-salt-sensitivity-in-rats
#13
Pavel Svitok, Tomas Senko, Zuzana Panakova, Lucia Olexova, Lucia Krskova, Monika Okuliarova, Michal Zeman
Renin angiotensin aldosterone system (RAAS) plays an essential role in the homeostatic control of arterial blood pressure, perfusion of tissues, and control of extracellular fluid. Its components are highly expressed in the developing kidney, general vasculature, brain, and heart. A modified intrauterine environment alters mechanisms controlling blood pressure (BP) and can lead to hypertension in the adult offspring and developmentally programmed RAAS can be involved in this process. There are very little data about the effects of increased angiotensin II (Ang II) concentrations during pregnancy on in utero development of the fetus...
July 24, 2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/28736286/lack-of-immunotoxic-effects-of-repeated-exposure-to-atrazine-associated-with-the-adaptation-of-adrenal-gland-activation
#14
Chad D Foradori, Arthur D Zimmerman, Pragati S Coder, Vanessa L Peachee, Robert J Handa, Ian Kimber, Stephen B Pruett, Charles B Breckenridge
T cell-dependent IgM antibody production and natural killer cell (NKC) activity were assessed in SD rats orally administered atrazine for 28 days to males (0, 6.5, 25, or 100 mg/kg/day) or females (0, 3, 6, or 50 mg/kg/day), or 30 or 500 ppm in diet (3 or 51 mg/kg/day). Anti-asialo GM1 antibodies (NKC) and cyclophosphamide (antibody-forming cell [AFC]) assays served as positive controls. Pituitary (ACTH, prolactin), adrenal (corticosterone, progesterone, aldosterone), and gonadal (androgens, estrogens) hormones were assessed after 1, 7, and/or 28 days of treatment...
July 20, 2017: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/28735756/incidence-and-determinants-of-hyperkalemia-and-hypokalemia-in-a-large-healthcare-system
#15
Erik Nilsson, Alessandro Gasparini, Johan Ärnlöv, Hairong Xu, Karin M Henriksson, Josef Coresh, Morgan E Grams, Juan Jesus Carrero
BACKGROUND: Hypo- and hyperkalemia in clinical settings are insufficiently characterized and large-scale data from Europe lacking. We studied incidence and determinants of these abnormalities in a large Swedish healthcare system. METHODS: Observational study from the Stockholm CREAtinine Measurements project, including adult individuals from Stockholm accessing healthcare in 2009 (n=364,955). Over 3-years, we estimated the incidence of hypokalemia, defined as potassium<3...
July 15, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28735660/case-detection-and-diagnosis-of-primary-aldosteronism-the-consensus-of-taiwan-society-of-aldosteronism
#16
Vin-Cent Wu, Ya-Hui Hu, Leay Kiaw Er, Ruoh-Fang Yen, Chia-Hui Chang, Ya-Li Chang, Ching-Chu Lu, Chin-Chen Chang, Jui-Hsiang Lin, Yen-Hung Lin, Tzung-Dau Wang, Chih-Yuan Wang, Shih Te Tu, Shih-Chieh Jeff Chueh, Ching-Chung Chang, Fen-Yu Tseng, Kwan-Dun Wu
BACKGROUND/PURPOSE: Even though the increasing clinical recognition of primary aldosteronism (PA) as a public health issue, its heightened risk profiles and the availability of targeted surgical/medical treatment being more understood, consensus in its diagnosis and management based on medical evidence, while recognizing the constraints of our real-world clinical practice in Taiwan, has not been reached. METHODS: The Taiwan Society of Aldosteronism (TSA) Task Force acknowledges the above-mentioned issues and reached this Taiwan PA consensus at its inaugural meeting, in order to provide updated information of internationally acceptable standards, and also to incorporate our local disease characteristics into the management of PA...
July 20, 2017: Journal of the Formosan Medical Association, Taiwan Yi Zhi
https://www.readbyqxmd.com/read/28734243/caveolin-1-related-autophagy-initiated-by-aldosterone-induced-oxidation-promotes-liver-sinusoidal-endothelial-cells-defenestration
#17
Xiaoying Luo, Dan Wang, Xuan Luo, Xintao Zhu, Guozhen Wang, Zuowei Ning, Yang Li, Xiaoxin Ma, Renqiang Yang, Siyi Jin, Yun Huang, Ying Meng, Xu Li
Aldosterone, with pro-oxidation and pro-autophagy capabilities, plays a key role in liver fibrosis. However, the mechanisms underlying aldosterone-promoted liver sinusoidal endothelial cells (LSECs) defenestration remain unknown. Caveolin 1 (Cav1) displays close links with autophagy and fenestration. Hence, we aim to investigate the role of Cav1-related autophagy in LSECs defenestration. We found the increase of aldosterone/MR (mineralocorticoid receptor) level, oxidation, autophagy, and defenestration in LSECs in the human fibrotic liver, BDL or hyperaldosteronism models; while antagonizing aldosterone or inhibiting autophagy relieved LSECs defenestration in BDL-induced fibrosis or hyperaldosteronism models...
July 13, 2017: Redox Biology
https://www.readbyqxmd.com/read/28733450/muscle-sympathetic-nerve-activity-and-volume-regulating-factors-in-healthy-pregnant-and-non-pregnant-women
#18
Nisha Charkoudian, Charlotte W Usselman, Rachel J Skow, Jeffery S Staab, Colleen Glyde Julian, Michael K Stickland, Radha S Chari, Rshmi Khurana, Sandra T Davidge, Margie H Davenport, Craig D Steinback
Healthy, normotensive human pregnancies are associated with striking increases in both plasma volume and vascular sympathetic nerve activity (SNA). In non-pregnant humans, volume regulatory factors including plasma osmolality, vasopressin and the renin-angiotensin-aldosterone system have important modulatory effects on control of sympathetic outflow. We hypothesized that pregnancy would be associated with changes in the relationships between SNA (measured as muscle SNA) and volume regulating factors, including plasma osmolality, plasma renin activity and arginine vasopressin (AVP)...
July 21, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28733447/mineralocorticoid-receptor-antagonists-attenuate-exaggerated-exercise-pressor-reflex-responses-in-hypertensive-rats
#19
Ryan M Downey, Masaki Mizuno, Jere Holloway Mitchell, Wanpen Vongpatanasin, Scott A Smith
Exaggerated heart rate (HR) and blood pressure responses to exercise in hypertension are mediated, in part, by overactivity of the exercise pressor reflex (EPR). The mechanisms underlying this EPR dysfunction have not been fully elucidated. Previous studies have shown that stimulation of mineralocorticoid receptors (MR) with exogenous administration of aldosterone in normal, healthy rats reproduces the EPR overactivity characteristic of hypertensive animals. Conversely, the purpose of this study was to examine whether antagonizing MR with spironolactone (SPIR) or eplerenone (EPL) in decerebrated hypertensive rats ameliorates abnormal EPR function...
July 21, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28733189/systematic-review-of-serum-steroid-reference-intervals-developed-using-mass-spectrometry
#20
REVIEW
Nevada Tavita, Ronda F Greaves
The aim of this study was to perform a systematic review of the published literature to determine the available serum/plasma steroid reference intervals generated by mass spectrometry (MS) methods across all age groups in healthy subjects and to suggest recommendations to achieve common MS based reference intervals for serum steroids. MEDLINE, EMBASE and PubMed databases were used to conduct a comprehensive search for English language, MS-based reference interval studies for serum/plasma steroids. Selection of steroids to include was based on those listed in the Royal College of Pathologists of Australasia Quality Assurance Programs, Chemical Pathology, Endocrine Program...
July 18, 2017: Clinical Biochemistry
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