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https://www.readbyqxmd.com/read/28649750/vasopressin-physiology-assessment-and-osmosentation
#1
Lise Bankir, Daniel G Bichet, Nils G Morgenthaler
Vasopressin (AVP) plays a major role in the regulation of water and sodium homeostasis by its antidiuretic action on the kidney, mediated by V2 receptors. AVP secretion is stimulated by a rise in plasma osmolality, a decline in blood volume, or stress. V1a receptors are expressed in vascular smooth muscle cells but the role of vasopressin in blood pressure regulation is still a matter of debate. AVP may also play a role in some metabolic pathways, including gluconeogenesis, through its action on V1a receptors expressed in the liver...
June 25, 2017: Journal of Internal Medicine
https://www.readbyqxmd.com/read/28645353/actualit%C3%A3-s-autour-de-la-prise-en-charge-des-diab%C3%A3-tes-insipides-centraux-management-of-central-diabetes-insipidus-in-2016
#2
H Lasolle, F Borson-Chazot
Diabetes insipidus is a syndrome that associates both hypotonic polyuria and polydipsia, due to insufficient or ineffective arginine vasopressin (AVP) synthesis, or to AVP resistance. The diagnosis between central/renal origin, or an abnormal thirst regulation (primary polydipsia) is required to organize an adapted management. Because water deprivation tests are not reliable, it's often based on medical history, response to treatment and MRI. Copeptin is an AVP precursor which could be very helpful for the diagnosis...
October 2016: Annales D'endocrinologie
https://www.readbyqxmd.com/read/28638629/pathophysiology-of-copeptin-in-kidney-disease-and-hypertension
#3
REVIEW
Baris Afsar
Copeptin is derived from the cleavage of the precursor of arginine vasopressin (AVP), produced in an equimolar ratio in hypothalamus and processed during axonal transport AVP is an unstable peptide and has a short half-life of 5-20 min. Unlike AVP, copeptin is a stable molecule and can easily be measured. Recent evidence suggest that increased copeptin levels have been associated with worse outcomes in various clinical conditions including chronic kidney disease (CKD) and hypertension. In this review, the data regarding copeptin with kidney function (evaluated as glomerular filtration rate, increased albumin/protein excretion or both) and hypertension with regard to performed studies, prognosis and pathogenesis was summarised...
2017: Clinical Hypertension
https://www.readbyqxmd.com/read/28614817/shifting-focus-from-hydration-for-performance-to-hydration-for-health
#4
Erica T Perrier
Over the past 10 years, literature on hydration biomarkers has evolved considerably - from (de)hydration assessment towards a more global definition of biomarkers of hydration in daily life. This shift in thinking about hydration markers was largely driven by investigating the differences that existed between otherwise healthy individuals whose habitual, ad-libitum drinking habits differ, and by identifying physiological changes in low-volume drinkers who subsequently increase their water intake. Aside from obvious differences in urinary volume and concentration, a growing body of evidence is emerging that links differences in fluid intake with small, but biologically significant, differences in vasopressin (copeptin), glomerular filtration rate, and markers of metabolic dysfunction or disease...
2017: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/28614813/polycystic-kidney-disease-and-the-vasopressin-pathway
#5
Maatje D A van Gastel, Vicente E Torres
Vasopressin, also known as arginine vasopressin or antidiuretic hormone, plays a pivotal role in maintaining body homeostasis. Increased vasopressin concentrations, measured by its surrogate copeptin, have been associated with disease severity as well as disease progression in polycystic kidney disease (PKD), and in experimental studies vasopressin has been shown to directly regulate cyst growth. Blocking vasopressin effects on the kidney via the vasopressin V2-receptor and lower circulating vasopressin concentration are potential treatment opportunities that have been the subject of study in PKD in recent years...
2017: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/28593800/use-of-copeptin-for-rapid-rule-out-of-acute-myocardial-infarction
#6
Christian Mueller, Martin Möckel, Evangelos Giannitsis, Kurt Huber, Johannes Mair, Mario Plebani, Kristian Thygesen, Allan S Jaffe, Bertil Lindahl
Copeptin is currently understood as a quantitative marker of endogenous stress. It rises rapidly in multiple acute disorders including acute myocardial infarction. As a single variable, it has only modest diagnostic accuracy for acute myocardial infarction. However, the use of copeptin within a dual-marker strategy together with conventional cardiac troponin increases the diagnostic accuracy and particularly the negative predictive value of cardiac troponin alone for acute myocardial infarction. The rapid rule-out of acute myocardial infarction is the only application in acute cardiac care mature enough to merit consideration for routine clinical care...
June 1, 2017: European Heart Journal. Acute Cardiovascular Care
https://www.readbyqxmd.com/read/28578535/effect-of-increased-water-intake-on-plasma-copeptin-in-healthy-adults
#7
Guillaume Lemetais, Olle Melander, Mariacristina Vecchio, Jeanne H Bottin, Sofia Enhörning, Erica T Perrier
PURPOSE: Inter-individual variation in median plasma copeptin is associated with incident type 2 diabetes mellitus, progression of chronic kidney disease, and cardiovascular events. In this study, we examined whether 24-h urine osmolality was associated with plasma copeptin and whether increasing daily water intake could impact circulating plasma copeptin. METHODS: This trial was a prospective study conducted at a single investigating center. Eighty-two healthy adults (age 23...
June 3, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/28558715/modern-peptide-biomarkers-and-echocardiography-in-cardiac-healthy-haemodialysis-patients
#8
Franz Maximilian Rasche, Stephan Stoebe, Thomas Ebert, Silvana Feige, Andreas Hagendorff, Wilma Gertrud Rasche, Filip Barinka, Volker Busch, Ulrich Sack, Jochen G Schneider, Stephan Schiekofer
BACKGROUND: In this prospective study, we aimed to assess the haemodynamic changes before and after haemodialysis (HD) in cardiac healthy subjects on chronic HD by imaging methods and endocrine markers of fluid balance. METHODS: Mid-regional pro-atrial natriuretic peptide (MR-proANP), N-terminal prohormone of brain natriuretic peptide (NT-proBNP), vasopressin (AVP) and copeptin (CT-proAVP), metanephrines and normetanephrines, renin and aldosterone, standard transthoracic echocardiography and diameter of vena cava inferior (VCID) were performed in 20 patients with end stage renal disease (CKD5D) before and after HD and were stratified in residual excretion (RE, less or more 0...
May 30, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28556237/characteristics-and-outcomes-of-patients-with-profound-hyponatremia-due-to-primary-polydipsia
#9
Clara Sailer, Bettina Winzeler, Nicole Nigro, Isabelle Suter-Widmer, Birsen Arici, Martina Bally, Philipp Schuetz, Beat Mueller, Mirjam Christ-Crain
OBJECTIVE: Hyponatremia due to excessive fluid intake (i.e. primary polydipsia (PP)) is common. It may culminate in profound hyponatremia-carrying considerable risk of morbidity. However, data on patients with PP leading to hyponatremia is lacking. Herein, we describe the characteristics of polydiptic patients hospitalised with profound hyponatremia, and assess one-year outcomes. DESIGN: Substudy of the prospective observational Co-MED Study. PATIENTS: Patients with an episode of profound hyponatremia (≤125mmol/l) due to PP in the medical emergency were eligible and classified into psychogenic polydipsia (PsyP), dipsogenic polydipsia (DiP), and beer potomania (BP)...
May 27, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28555260/serum-copeptin-predicts-severity-and-recurrent-stroke-in-ischemic-stroke-patients
#10
Wan-Zhong Tang, Xiao-Bo Wang, Huan-Ting Li, Mei Dong, Xiang Ji
Several studies investigated the prognostic role of copeptin in stroke. The aim of this study is to assess copeptin levels in serum, and investigate their associations with risk of recurrent stroke in a 1-year follow-up study in patients with ischemic stroke. In this post hoc analysis, serum levels of copeptin and NIH stroke scale (NIHSS) were measured at the time of admission in a cohort of 316 patients with ischemic stroke. The end point was stroke recurrence after 1-year follow-up. We used logistic regression model to assess the relationship between copeptin levels and risk recurrent stroke...
May 30, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/28552021/maternal-copeptin-levels-in-intrahepatic-cholestasis-of-pregnancy
#11
Ahmet Tayyar, İlkbal Temel Yüksel, Nadiye Köroğlu, Ahter Tanay Tayyar, Ebru Alıcı Davutoğlu, Asuman Akkaya Fırat, Berna Aslan Çetin
PURPOSE: To investigate copeptin levels in women with intrahepatic cholestasis of pregnancy (ICP) compared to women with uncomplicated pregnancies. MATERIALS AND METHODS: This cross-sectional study was conducted in 40 pregnant women with ICP and 38 randomly selected healthy pregnant women, who formed the control group. Serum copeptin concentrations were measured using an enzyme-linked immunosorbent assay. RESULTS: Maternal age, body mass index at assessment, and gestational age at blood sampling were similar between the two groups...
May 28, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28545954/prognostic-role-of-copeptin-after-traumatic-brain-injury-a-systematic-review-and-meta-analysis-of-observational-studies
#12
Kyu-Sun Choi, Youngsuk Cho, Bo-Hyoung Jang, Wonhee Kim, Chiwon Ahn, Tae Ho Lim, Hyoung-Joong Yi
PURPOSE: Copeptin, the C-terminal portion of provasopressin, has emerged as a novel prognostic marker in neurocritical care, such as in traumatic brain injury (TBI). The aim of this study was to quantitatively assess the prognostic significance of initial plasma copeptin levels in the neurological outcome and mortality after traumatic brain injury. MATERIALS AND METHODS: Six relevant studies with data from 552 patients were included in this meta-analysis. RESULTS: The plasma copeptin levels were found to be significantly higher in patients who died than in the survivors (standardized mean difference [SMD], 1...
April 19, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28503166/inhibition-of-ectopic-arginine-vasopressin-production-by-phenytoin-in-the-small-cell-lung-cancer-cell-line-lu-165
#13
Takahiro Ohta, Mitsuo Mita, Shigeru Hishinuma, Reiko Ishii-Nozawa, Kazuhisa Takahashi, Masaru Shoji
Phenytoin, a voltage-gated sodium channel (NaV channel) antagonist, reportedly inhibits arginine vasopressin (AVP) release from an isolated rat neurohypophysis. So far, it is uncertain whether phenytoin has a direct action on ectopic AVP-producing neuroendocrine tumors. We studied the effect of phenytoin on the release of copeptin, the C-terminal fragment of pro-AVP, and expression of AVP gene in the human small cell lung cancer cell line Lu-165. Cells were maintained in RPMI1640 medium with 10% fetal bovine serum and were used within the fifth passage...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28491088/novel-biomarkers-for-cardiovascular-risk-prediction
#14
REVIEW
Juan Wang, Guo-Juan Tan, Li-Na Han, Yong-Yi Bai, Miao He, Hong-Bin Liu
Cardiovascular disease (CVD) is the leading cause of death and disability worldwide. The primary prevention of CVD is dependent upon the ability to identify high-risk individuals long before the development of overt events. This highlights the need for accurate risk stratification. An increasing number of novel biomarkers have been identified to predict cardiovascular events. Biomarkers play a critical role in the definition, prognostication, and decision-making regarding the management of cardiovascular events...
February 2017: Journal of Geriatric Cardiology: JGC
https://www.readbyqxmd.com/read/28486916/are-markers-of-cardiac-dysfunction-useful-in-the-assessment-of-cardiovascular-risk-in-dialysis-patients
#15
Beata Franczyk, Anna Gluba-Brzózka, Piotr Bartnicki, Maciej Banach, Jacek Rysz
Cardiovascular morbidity and mortality of dialysis patients is a major problem in this group. The purpose of this study was also to evaluate whether any of studied markers are better than troponin in early detection of the occurrence of ventricular arrhythmias and prolongation of QT interval. This study included 45 patients undergoing haemodialysis. ECG Holter and echocardiographic examination were performed before and after dialysis. The concentration of markers: copeptin, GDF-15, HFABP and troponin were measured with the use of ELISA tests...
May 8, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28457803/evaluation-of-urinary-aquaporin-2-and-plasma-copeptin-as-biomarkers-of-effectiveness-of-desmopressin-acetate-for-the-treatment-of-monosymptomatic-nocturnal-enuresis
#16
Taichi Hara, Yoshiyuki Ohtomo, Amane Endo, Shinichi Niijima, Masato Yasui, Toshiaki Shimizu
PURPOSE: Desmopressin is a synthetic V2-specific analog of antidiuretic hormone (arginine vasopressin), widely used as a first-line treatment for monosymptomatic nocturnal enuresis. However, no biomarkers to predict desmopressin effectiveness have yet been established. Because arginine vasopressin is unstable, we prospectively measured the major urine concentration factors aquaporin-2 and copeptin (as a surrogate marker for vasopressin) in patients with monosymptomatic nocturnal enuresis, and evaluated whether they are useful for predicting desmopressin treatment outcome...
April 27, 2017: Journal of Urology
https://www.readbyqxmd.com/read/28457001/plasma-copeptin-and-metabolic-dysfunction-in-individuals-with-bipolar-disorder
#17
Rodrigo B Mansur, Lucas B Rizzo, Camila M Santos, Elson Asevedo, Graccielle R Cunha, Mariane N Noto, Mariana Pedrini, Maiara Zeni-Graiff, Quirino Cordeiro, Roger S McIntyre, Elisa Brietzke
AIM: This study aimed to compare plasma copeptin levels, the c-terminal of provasopressin, between individuals with bipolar disorder (BD) and healthy controls and to assess the relationship between copeptin and metabolic parameters. METHODS: We measured plasma levels of copeptin in individuals with BD (N = 55) and healthy controls (N = 21). Information related to psychiatric/medical history, as well as to metabolic comorbidities and laboratorial parameters was also captured...
April 29, 2017: Psychiatry and Clinical Neurosciences
https://www.readbyqxmd.com/read/28447918/no-relation-between-biomarkers-at-age-47-49-and-aortic-diameter-after-14-19-years-of-follow-up-a-population-based-study
#18
Soumia Taimour, Moncef Zarrouk, Jan Holst, Olle Melander, Gunar Engström, J Gustav Smith, Anders Gottsäter
BACKGROUND: Biomarkers reflecting diverse pathophysiological pathways may play an important role in the pathogenesis of abdominal aortic aneurysm (aortic diameter ≥30 mm, AAA), levels of many biomarkers are elevated and correlated to aortic diameter among 65-year-old men undergoing ultrasound (US) screening for AAA. PROBANDS AND METHODS: To evaluate potential relationships between biomarkers and aortic dilatation after long-term follow-up, levels of C-reactive protein (CRP), proneurotensin (PNT), copeptin (CPT), lipoprotein-associated phospholipase 2 (Lp-PLA2), cystatin C (Cyst C), midregional proatrial natriuretic peptide (MR-proANP), and midregional proadrenomedullin (MR-proADM) were measured in 117 subjects (114 [97 %] men) aged 47-49 in a prospective population-based cohort study, and related to aortic diameter at US examination of the aorta after 14-19 years of follow-up...
April 27, 2017: VASA. Zeitschrift Für Gefässkrankheiten
https://www.readbyqxmd.com/read/28432473/vasopressin-and-vasopressin-antagonists-in-heart-failure
#19
Julie K Vishram-Nielsen, Finn Gustafsson
Despite the introduction of multiple new pharmacological agents over the past three decades in the field of heart failure (HF), overall prognosis remains poor. Hyponatremia is prevalent in HF patients and has been suggested as a contributor to poor response to standard therapy. Elevated levels of arginine vasopressin (AVP), a peptide hormone produced in the hypothalamus, play a role in development of hyponatremia, and AVP and its surrogate, copeptin, are related to changes in osmolality, hemodynamics, neuro-hormones as well as in overall outcome in HF patients...
April 22, 2017: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/28431872/plasma-copeptin-levels-in-the-patients-with-gastrointestinal-bleeding
#20
Ömer Salt, Polat Durukan, S Ozkan, R Saraymen, A Sen, M A Yurci
INTRODUCTION: Gastrointestinal bleeding is a significant cause of morbidity and mortality worldwide. In addition, it constitutes an important part of health expenditures. In this study, we aimed to determine whether there is a relationship between plasma copeptin levels and the etiology, location and severity of gastrointestinal bleeding. MATERIALS AND METHODS: This study was performed prospectively in 104 consecutive patients who were admitted to an emergency department with complaints of bloody vomiting or bloody or black stool...
April 14, 2017: American Journal of Emergency Medicine
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