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Arginine vasopressin

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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
#1
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
#2
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/28623226/entraining-to-the-polar-day-circadian-rhythms-in-arctic-ground-squirrels
#3
Cory T Williams, Brian M Barnes, Lily Yan, C Loren Buck
Circadian systems are principally entrained to 24h light/dark cycles, but this cue is seasonally absent in polar environments. Although some resident polar vertebrates have weak circadian clocks and are seasonally arrhythmic, the arctic ground squirrel (AGS) maintains daily rhythms of physiology and behavior throughout the summer, which includes six weeks of constant daylight. Here, we show that persistent daily rhythms in AGS are maintained through a circadian system that readily entrains to the polar day yet remains insensitive to entrainment by rapid light-dark transitions, which AGS generate naturally due to their semi-fossorial behavior...
June 16, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28622690/exploiting-cancer-s-phenotypic-guise-against-itself-targeting-ectopically-expressed-peptide-g-protein-coupled-receptors-for-lung-cancer-therapy
#4
REVIEW
Mahjabin Khan, Tao Huang, Cheng-Yuan Lin, Jiang Wu, Bao-Min Fan, Zhao-Xiang Bian
Lung cancer, claiming millions of lives annually, has the highest mortality rate worldwide. This advocates the development of novel cancer therapies that are highly toxic for cancer cells but negligibly toxic for healthy cells. One of the effective treatments is targeting overexpressed surface receptors of cancer cells with receptor-specific drugs. The receptors-in-focus in the current review are the G-protein coupled receptors (GPCRs), which are often overexpressed in various types of tumors. The peptide subfamily of GPCRs is the pivot of the current article owing to the high affinity and specificity to and of their cognate peptide ligands, and the proven efficacy of peptide-based therapeutics...
June 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/28620355/role-of-the-vasopressin-apelin-balance-and-potential-use-of-metabolically-stable-apelin-analogs-in-water-metabolism-disorders
#5
REVIEW
Adrien Flahault, Pierre Couvineau, Rodrigo Alvear-Perez, Xavier Iturrioz, Catherine Llorens-Cortes
Apelin, a (neuro)vasoactive peptide, plays a prominent role in controlling body fluid homeostasis and cardiovascular functions. In animal models, experimental data demonstrate that intracerebroventricular injection of apelin into lactating rats inhibits the phasic electrical activity of arginine vasopressin (AVP) neurons, reduces plasma AVP levels, and increases aqueous diuresis. In the kidney, apelin increases diuresis by increasing the renal microcirculation and by counteracting the antidiuretic effect of AVP at the tubular level...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28619276/arginine-vasopressin-relates-with-spatial-learning-and-memory-in-a-mouse-model-of-spinocerebellar-ataxia-type-3
#6
Hong-Bo Jiang, Ai-Lin Du, Hai-Yang Luo, Jun Yang, Xiao-Qiu Luo, Rui-Qing Ma, Chang-He Shi, Yu-Ming Xu
Spinocerebellar ataxia is an inherited neurodegenerative disorder that the most prevalent type is type 3 (SCA3). Arginine vasopressin (AVP) is released within the lateral septum for controlling the learning and memory. This communication studied the effect of AVP on the spatial learning and memory of SCA3 mice. The spatial learning and memory were analyzed by Morris water maze test (MWM), and AVP concentration was measured by radioimmunoassay. The results showed that (Alves et al., 2010) the swimming velocity, distance traveled and latency to the platform of MWM in SCA3 mice were reduced slower than those in WT mice over 4 training days (p<0...
June 6, 2017: Neuropeptides
https://www.readbyqxmd.com/read/28618757/the-effect-of-acetylsalicylic-acid-on-vasopressin-serum-insulin-levels-insulin-resistance-and-biochemical-parameters-in-rats-induced-with-experimental-diabetes-type-2
#7
Serkan Şen, Sefa Çelik
BACKGROUND/AIM: Acetylsalicylic acid (ASA) treatment in diabetic patients is very important owing to the increasing hyperactivity of thrombocytes and atherosclerosis. In several investigations, it was reported that diabetes caused increased coronary artery disease, cerebrovascular disease, and death. In this study, we aimed to investigate the effect of ASA on osmoregulation, glycemic control, and some biochemical parameters in rats induced with experimental diabetes type 2. MATERIALS AND METHODS: Twenty-four rats were randomly divided in four groups: control (I), ASA control (II), diabetic (III), and ASA diabetic (IV)...
June 12, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28614813/polycystic-kidney-disease-and-the-vasopressin-pathway
#8
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/28608287/increased-glutamic-acid-decarboxylase-expression-in-the-hypothalamic-suprachiasmatic-nucleus-in-depression
#9
Xueyan Wu, Rawien Balesar, Jing Lu, Sahar Farajnia, Qiongbin Zhu, Manli Huang, Ai-Min Bao
In depression, disrupted circadian rhythms reflect abnormalities in the central circadian pacemaker, the hypothalamic suprachiasmatic nucleus (SCN). Although many SCN neurons are said to be GABAergic, it was not yet known whether and how SCN GABA changes occur in the SCN in depression. We, therefore, studied GABA in the SCN in relation to the changes in arginine vasopressin (AVP), which is one of the major SCN output systems. Postmortem hypothalamus specimens of 13 subjects suffering from depression and of 13 well-matched controls were collected...
June 12, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28597171/hypopituitarism-is-associated-with-lower-oxytocin-concentrations-and-reduced-empathic-ability
#10
Katie Daughters, Antony S R Manstead, D Aled Rees
PURPOSE: Central diabetes insipidus is characterised by arginine vasopressin deficiency. Oxytocin is structurally related to vasopressin and is synthesised in the same hypothalamic nuclei, thus we hypothesised that patients with acquired central diabetes insipidus and anterior hypopituitarism would display an oxytocin deficiency. Moreover, psychological research has demonstrated that oxytocin influences social and emotional behaviours, particularly empathic behaviour. We therefore further hypothesised that central diabetes insipidus patients would perform worse on empathy-related tasks, compared to age-matched and gender-matched clinical control (clinical control-isolated anterior hypopituitarism) and healthy control groups...
June 8, 2017: Endocrine
https://www.readbyqxmd.com/read/28589293/impairment-of-osmotic-challenge-induced-neurohypophyseal-hormones-secretion-in-sepsis-survivor-rats
#11
Nilton Nascimento Santos-Junior, Luís Henrique Angenendt Costa, Carlos Henrique Rocha Catalão, Alexandre Kanashiro, Tarek Sharshar, Maria José Alves Rocha
BACKGROUND/PURPOSE: Recent studies have reported that sepsis survivors show impaired central nervous system functions. The osmoregulation in this post-sepsis condition has not been well investigated. In the present study, we evaluated the secretion of neurohypophyseal hormones, arginine vasopressin (AVP) and oxytocin (OT), and water intake induced by osmotic challenge in survivor rats. METHODS: Wistar rats were submitted to sepsis by cecal ligation and puncture (CLP)...
June 6, 2017: Pituitary
https://www.readbyqxmd.com/read/28589067/intraoperative-dexmedetomidine-induced-polyuric-syndrome
#12
Shannon Granger, David Ninan
A 23-year-old male trauma patient with a cervical spine fracture underwent an anterior and posterior discectomy and spinal fusion surgery. The patient presented to the operating room with a stabilizing halo fixation device in place, and a fiberoptic intubation was performed with dexmedetomidine for sedation. During the surgical procedure, general anesthesia was maintained with a propofol and remifentanil infusion as the patient was monitored using somatosensory and motor evoked potentials. The patient's urine output increased gradually during the nine-hour surgical procedure from 150 mL/hour to over 700 mL/hour in the eighth hour of the procedure, where it remained until the end of the procedure...
May 3, 2017: Curēus
https://www.readbyqxmd.com/read/28583780/-nephrogenic-syndrome-of-inappropriate-antidiuresis-early-diagnosis-avoids-severe-hyponatremia-complications
#13
A Cailleaux, F Mahieu, C Heinrichs, B Adams, K Ismaili, C Brachet
AIM: Nephrogenic syndrome of inappropriate antidiuresis (NSIAD) is a rare disease characterized by a kidney disability to dilute urine and, as a result, severe recurrent hyponatremia. Due to wide variability in clinical expression, the diagnosis still remains a challenge for clinicians. We report our experience of a case in which NSIAD was diagnosed early. We also stress the importance of early diagnosis and treatment, which protects an infant with NSAID from severe hyponatremia. BACKGROUND: A 1-month-old boy was referred to our hospital for persistent hyponatremia and intense vomiting...
June 2, 2017: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/28580089/anesthetic-experience-of-frontotemporal-dementia-patient-with-severe-autonomic-dysfunction-a-case-report
#14
Hyae-Jin Kim, Hyeon Jeong Lee, Do Won Lee, Jae Yeon Kim, Jae Young Kwon, Hae-Kyu Kim, Won-Sung Kim, Boo-Young Hwang
Anesthetic experience in frontotemporal dementia (FTD) with severe hypotension associated autonomic dysfunction has not yet been reported. Here in case, we report on the case of treatment with vasopressin to refractory hypotension in FTD patient. A 54-year-old male presented with a ten-year history of FTD with frequent syncope. The patient was scheduled to undergo subtotal gastrectomy for resection of stomach cancer. During the operation, sudden hypotension occurred and it was refractory to fluid and 1 unit of blood resuscitation and did not respond to catecholamine...
June 2017: Korean Journal of Anesthesiology
https://www.readbyqxmd.com/read/28580075/role-of-vasopressin-in-current-anesthetic-practice
#15
REVIEW
Keun Suk Park, Kyung Yeon Yoo
Arginine vasopressin (AVP), also known as antidiuretic hormone, is a peptide endogenously secreted by the posterior pituitary in response to hyperosmolar plasma or systemic hypoperfusion states. When administered intravenously, it causes an intense peripheral vasoconstriction through stimulation of V1 receptors on the vascular smooth muscle. Patients in refractory shock associated with severe sepsis, cardiogenic or vasodilatory shock, or cardiopulmonary bypass have inappropriately low plasma levels of AVP ('relative vasopressin deficiency') and supersensitivity to exogenously-administered AVP...
June 2017: Korean Journal of Anesthesiology
https://www.readbyqxmd.com/read/28560103/effects-of-arginine-vasopressin-on-the-urine-proteome-in-rats
#16
Manxia An, Yanying Ni, Xundou Li, Youhe Gao
Biomarkers are the measurable changes associated with a physiological or pathophysiological process. The content of urine frequently changes because it is not controlled by homeostatic mechanisms, and these alterations can be a source of biomarkers. However, urine is affected by many factors. In this study, vasoconstrictor and antidiuretic arginine vasopressin (AVP) were infused into rats using an osmotic pump. The rats' urinary proteome after one week of infusion was analyzed by label-free LC-MS/MS. A total of 408 proteins were identified; among these proteins, eight and 10 proteins had significantly altered expression in the low and high dose groups, respectively, compared with the control group using the one-way ANOVA analysis followed by post hoc analysis with the least significant difference (LSD) test or Dunnett's T3 test...
2017: PeerJ
https://www.readbyqxmd.com/read/28558702/background-anaesthetic-agents-do-not-influence-the-impact-of-arginine-vasopressin-on-haemodynamic-states-and-cerebral-oxygenation-during-shoulder-surgery-in-the-beach-chair-position-a-prospective-single-blind-study
#17
Eun-A Jang, Ji-A Song, Ji Youn Shin, Jae Joon Yoon, Kyung Yeon Yoo, Seongtae Jeong
BACKGROUND: Administration of arginine vasopressin (AVP) is associated with reducing jugular venous (SjvO2) and regional cerebral (rScO2) oxygen saturation under propofol-remifentanil (P/R) anaesthesia. We determined whether background anaesthetics modulate the effect of AVP on cerebral oxygenation and haemodynamics. METHODS: We randomly allocated 60 adult patients scheduled for shoulder surgery in the beach chair position (BCP) into 4 groups, to receive either an intravenous bolus of saline (groups PR-S and SN-S) or 0...
May 30, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/28551755/the-role-of-the-oxytocin-arginine-vasopressin-system-in-animal-models-of-autism-spectrum-disorder
#18
Rong Zhang, Xin-Jie Xu, Hong-Feng Zhang, Song-Ping Han, Ji-Sheng Han
The nonapeptides oxytocin (OXT) and arginine vasopressin (AVP) are two key mediators in regulating various aspects of mammalian social behaviours. There are several lines of evidence that genetic variants of the OXT/AVP system exist in autism spectrum disorder (ASD) and that this system is dysfunctional at least in some ASD entities. These findings have stimulated the interest to perform studies testing the potential therapeutic application of OXT/AVP in ASD. In this respect animal models are critical for investigating the pathophysiology and for compound screening leading to new therapeutic approaches...
2017: Advances in Anatomy, Embryology, and Cell Biology
https://www.readbyqxmd.com/read/28550404/development-of-an-imaging-system-for-in-vivo-real-time-monitoring-of-neuronal-activity-in-deep-brain-of-free-moving-rats
#19
Norio Iijima, Shinji Miyamoto, Keisuke Matsumoto, Ken Takumi, Yoichi Ueta, Hitoshi Ozawa
We have newly developed a system that allows monitoring of the intensity of fluorescent signals from deep brains of rats transgenically modified to express enhanced green fluorescent protein (eGFP) via an optical fiber. One terminal of the optical fiber was connected to a blue semiconductor laser oscillator/green fluorescence detector. The other terminal was inserted into the vicinity of the eGFP-expressing neurons. Since the optical fiber was vulnerable to twisting stresses caused by animal movement, we also developed a cage in which the floor automatically turns, in response to the turning of the rat's head...
May 26, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/28541755/epinephrine-but-not-vasopressin-attenuates-the-airway-response-to-anaphylactic-shock-in-rats
#20
Feng Zheng, Ruxandra Copotoiu, Charles Tacquard, Bruno Demoulin, Jean Marc Malinovsky, Bruno Levy, Dan Longrois, Grégoire Barthel, Paul Michel Mertes, François Marchal, Silvia Demoulin-Alexikova, Olivier Collange
PURPOSE: The two life-threatening signs of anaphylactic shock (AS) are severe arterial hypotension and bronchospasm. Guidelines recommend epinephrine as first-line treatment. Arginine vasopressin (AVP) has been proposed as an alternative if epinephrine does not correct arterial hypotension. These two drugs may have beneficial, neutral or deleterious effects on airflow either directly or by modifying factors that regulate vasodilatation and/or edema in the bronchial wall. AIM OF THE STUDY: To compare the effects of epinephrine and AVP on airflow and airway leakage in a rat model of AS...
April 2017: Experimental Lung Research
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