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Vasopressin

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https://www.readbyqxmd.com/read/28098344/inhibition-of-oxytocin-and-vasopressin-neuron-activity-in-rat-hypothalamic-paraventricular-nucleus-by-relaxin-3-rxfp3-signalling
#1
Alan Kania, Anna Czerw, Agnieszka Grabowiecka, Camila de Ávila, Tomasz Blasiak, Zenon Rajfur, Marian H Lewandowski, Grzegorz Hess, Elena Timofeeva, Andrew L Gundlach, Anna Blasiak
KEY-POINTS: Relaxin-3 is a stress-responsive neuropeptide that acts at its cognate receptor, RXFP3, to alter behaviours including feeding. In this study, we have demonstrated a direct, RXFP3-dependent, inhibitory action of relaxin-3 on oxytocin and vasopressin PVN neuron electrical activity, a putative cellular mechanism of orexinergic actions of relaxin-3. We observed a Gαi/o -protein-dependent inhibitory influence of selective RXFP3 activation on PVN neuronal activity in vitro and demonstrated a direct action of RXFP3 activation on oxytocin and vasopressin PVN neurons, confirmed by their abundant expression of RXFP3 mRNA...
January 18, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28096417/phosphorylation-by-pkc-and-pka-regulate-the-kinase-activity-and-downstream-signaling-of-wnk4
#2
Maria Castañeda-Bueno, Juan Pablo Arroyo, Junhui Zhang, Jeremy Puthumana, Orlando Yarborough, Shigeru Shibata, Lorena Rojas-Vega, Gerardo Gamba, Jesse Rinehart, Richard P Lifton
With-no-lysine kinase 4 (WNK4) regulates electrolyte homeostasis and blood pressure. WNK4 phosphorylates the kinases SPAK (Ste20-related proline alanine-rich kinase) and OSR1 (oxidative stress responsive kinase), which then phosphorylate and activate the renal Na-Cl cotransporter (NCC). WNK4 levels are regulated by binding to Kelch-like 3, targeting WNK4 for ubiquitylation and degradation. Phosphorylation of Kelch-like 3 by PKC or PKA downstream of AngII or vasopressin signaling, respectively, abrogates binding...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28091880/inhibition-of-neuronal-nitric-oxide-synthase-activity-does-not-alter-vasopressin-secretion-in-septic-rats
#3
Camila Henriques Coelho, Thalita Freitas Martins, Gabriela Ravanelli Oliveira-Pelegrin, Maria José Alves da Rocha
BACKGROUND/PURPOSE: During the early phase of sepsis, hypotension is accompanied by increase of plasma vasopressin hormone (AVP) levels, which decline during the late phase. This hypotension is due in part to increase of nitric oxide (NO) synthesis by nitric oxide synthase (NOS) enzyme. Neuronal isoform of this enzyme (nNOS) is present in vasopressinergics neurons of hypothalamus, but its role in vasopressin secretion during sepsis is unknown. METHODS: We evaluated the role of nNOS in NO production and vasopressin secretion during sepsis...
January 16, 2017: Pituitary
https://www.readbyqxmd.com/read/28090219/integrated-microfluidic-aptasensor-for-mass-spectrometric-detection-of-vasopressin-in-human-plasma-ultrafiltrate
#4
J Yang, J Zhu, R Pei, J A Oliver, D W Landry, M N Stojanovic, Q Lin
We present a microfluidic aptamer-based biosensor for detection of low-molecular-weight biomarkers in patient samples. Using a microfluidic device that integrates aptamer-based specific analyte extraction, isocratic elution, and detection by matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry, we demonstrate rapid, sensitive and label-free detection of arginine vasopressin (AVP) in human plasma ultrafiltrate. AVP molecules in complex matrices are specifically captured by an aptamer that is immobilized on microbeads via affinity binding in a microchamber...
July 14, 2016: Analytical Methods: Advancing Methods and Applications
https://www.readbyqxmd.com/read/28081165/urine-concentrating-capacity-vasopressin-and-copeptin-in-adpkd-and-iga-nephropathy-patients-with-renal-impairment
#5
Debbie Zittema, Niek F Casteleijn, Stephan J L Bakker, Lianne S M Boesten, A A Margreeth Duit, Casper F M Franssen, Carlo A J M Gaillard, Ron T Gansevoort
BACKGROUND: Autosomal Dominant Polycystic Kidney Disease (ADPKD) patients have an impaired urine concentrating capacity. Increased circulating vasopressin (AVP) concentrations are supposed to play a role in the progression of ADPKD. We hypothesized that ADPKD patients have a more severely impaired urine concentrating capacity in comparison to other patients with chronic kidney disease at a similar level of kidney function, with consequently an enhanced AVP response to water deprivation with higher circulating AVP concentrations...
2017: PloS One
https://www.readbyqxmd.com/read/28081152/increased-serum-sodium-and-serum-osmolarity-are-independent-risk-factors-for-developing-chronic-kidney-disease-5-year-cohort-study
#6
Masanari Kuwabara, Ichiro Hisatome, Carlos A Roncal-Jimenez, Koichiro Niwa, Ana Andres-Hernando, Thomas Jensen, Petter Bjornstad, Tamara Milagres, Christina Cicerchi, Zhilin Song, Gabriela Garcia, Laura G Sánchez-Lozada, Minoru Ohno, Miguel A Lanaspa, Richard J Johnson
BACKGROUND: Epidemics of chronic kidney disease (CKD) not due to diabetes mellitus (DM) or hypertension have been observed among individuals working in hot environments in several areas of the world. Experimental models have documented that recurrent heat stress and water restriction can lead to CKD, and the mechanism may be mediated by hyperosmolarity that activates pathways (vasopressin, aldose reductase-fructokinase) that induce renal injury. Here we tested the hypothesis that elevated serum sodium, which reflects serum osmolality, may be an independent risk factor for the development of CKD...
2017: PloS One
https://www.readbyqxmd.com/read/28079670/impact-of-genetic-variation-in-the-vasopressin-1a-receptor-on-the-development-of-organ-failure-in-patients-admitted-for-acute-decompensation-of-liver-cirrhosis
#7
Annarein J C Kerbert, Jelte J Schaapman, Johan J van der Reijden, Àlex Amorós Navarro, Aiden McCormick, Bart van Hoek, Vicente Arroyo, Pere Ginès, Rajiv Jalan, Victor Vargas, Rudolf Stauber, Hein W Verspaget, Minneke J Coenraad
BACKGROUND: Vasopressin receptor-mediated vasoconstriction is considered to be involved in the pathogenesis of organ failure in acute-on-chronic liver failure (ACLF). PATIENTS AND METHODS: We studied the association between six single nucleotide polymorphisms (SNPs) of the vasopressin 1a receptor gene and the development of organ failure in 826 patients admitted for acute decompensation of liver cirrhosis (n=641) or ACLF (n=185). RESULTS: No associations were found for SNPs with the presence of circulatory or renal failure...
January 10, 2017: European Journal of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28074401/adipsic-diabetes-insipidus-in-adult-patients
#8
REVIEW
Martín Cuesta, Mark J Hannon, Christopher J Thompson
INTRODUCTION: Adipsic diabetes insipidus (ADI) is a very rare disorder, characterized by hypotonic polyuria due to arginine vasopressin (AVP) deficiency and failure to generate the sensation of thirst in response to hypernatraemia. As the sensation of thirst is the key homeostatic mechanism that prevents hypernatraemic dehydration in patients with untreated diabetes insipidus (DI), adipsia leads to failure to respond to aquaresis with appropriate fluid intake. This predisposes to the development of significant hypernatraemia, which is the typical biochemical manifestation of adipsic DI...
January 10, 2017: Pituitary
https://www.readbyqxmd.com/read/28073658/copeptin-levels-in-patients-with-vasovagal-syncope
#9
Panayota Flevari, Dionyssios Leftheriotis, Christos Kroupis, George Antonakos, John Lekakis, Kleanthi Dima
BACKGROUND AND PURPOSE: Vasovagal syncope (VVS) is linked to more than one pathophysiologic mechanisms. Copeptin, an emerging cardiovascular marker, is a surrogate for arginine-vasopressin, which increases following VVS. We aimed to assess the dynamic pattern of copeptin levels in typical VVS, categorized by the degree of vasoconstriction during orthostasis, and healthy controls. METHODS: The following groups were studied: Group A (n=21), with adequate limb vasoconstriction during the first min...
January 4, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28072656/isosorbide-induced-decompression-effect-on-the-scala-media-participation-of-plasma-osmolality-and-plasma-arginine-vasopressin
#10
Taizo Takeda, Setsuko Takeda, Natsumi Uehara, Shungaku Yanagisawa, Tatsuya Furukawa, Ken-Ichi Nibu, Akinobu Kakigi
OBJECTIVE: The correlation between the isosorbide-induced decompression effect on the endolymphatic space and plasma osmolality (p-OSM) or plasma arginine vasopressin (p-AVP) was investigated on comparing two different dosages of isosorbide (2.8 and 1.4 g/kg) to elucidate why the decompression effect is delayed with a large dose of isosorbide. MATERIALS AND METHODS: Two experiments were performed using 80 guinea pigs. Experiment 1 was designed to morphologically investigate the sequential influence of the oral intake of 1...
January 9, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28072605/oxytocin-alleviates-orofacial-mechanical-hypersensitivity-associated-with-infraorbital-nerve-injury-via-vasopressin-1a-receptors-of-the-rat-trigeminal-ganglia
#11
Asako Kubo, Masamichi Shinoda, Ayano Katagiri, Mamoru Takeda, Tatsuro Suzuki, Junichi Asaka, David C Yeomans, Koichi Iwata
Oxytocin (OXT) is a neuropeptide hormone synthesized and secreted by hypothalamic neurons, and has been reported to play a significant role in pain modulation. However, the mechanisms underlying OXT's antinociceptive effect on neuropathic pain are not fully understood. In the present study, we examined the peripheral effect of OXT on mechanical hypersensitivity induced by partial ligation of the infraorbital nerve (PNL) in rats. Mechanical hypersensitivity in the whisker pad skin following PNL was attenuated by the direct administration of OXT into the trigeminal ganglion (TG)...
January 7, 2017: Pain
https://www.readbyqxmd.com/read/28072496/structural-reconstruction-of-the-perivascular-space-in-the-adult-mouse-neurohypophysis-during-an-osmotic-stimulation
#12
K Nishikawa, E Furube, S Morita, N Horii-Hayashi, M Nishi, S Miyata
Oxytocin (OXT) and arginine vasopressin (AVP), neuropeptides in the neurohypophysis (NH), control lactation and body fluid homeostasis, respectively. Hypothalamic neurosecretory neurons project their axons from the supraoptic and paraventricular nuclei to the NH to make contact with the vascular surface and release OXT and AVP. The neurohypophysial vascular structure is unique, because it has a wide perivascular space between the inner and outer basement membranes. However, the significance of this unique vascular structure remains unclear; therefore, we aimed to elucidate the functional significance of the perivascular space and its activity-dependent changes during salt loading in adult mice...
January 10, 2017: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/28070623/synaptic-contact-between-median-preoptic-neurons-and-subfornical-organ-neurons-projecting-to-the-paraventricular-hypothalamic-nucleus
#13
Hitoshi Kawano
It is known that the median preoptic nucleus (POMe) sends dense projections to the subfornical organ (SFO). However, the functional significance of these projections have not been well discussed. In this electron microscopic study, we investigated the presence of synapses between POMe-derived axon terminals and SFO neurons that project to the paraventricular hypothalamic nucleus (PVN). After injection of a retrograde tracer, wheat germ agglutinin-conjugated horseradish peroxidase-colloidal gold complex, into the PVN, many labeled neurons were found in the SFO...
January 9, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28069591/vasotocin-receptor-blockade-disrupts-maternal-care-of-offspring-in-a-viviparous-snake-sistrurus-miliarius
#14
Craig M Lind, Nikolette K Birky, Anita M Porth, Terence M Farrell
Parental care is a complex social behavior that is widespread among vertebrates. The neuroendocrine regulation of parent-offspring social behavior has been well-described in mammals, and, to a lesser extent, birds and fish. However, little is known regarding the underlying mechanisms that mediate the expression of care behaviors in squamate reptiles. In mammalian model species and humans, posterior pituitary hormones of the oxytocin and vasopressin families mediate parental care behaviors. To test the hypothesis that the regulatory role of posterior pituitary neuropeptides is conserved in a viviparous squamate reptile, we pharmacologically blocked the vasotocin receptor in postparturient pigmy rattlesnakes, Sistrurus miliarius, and monitored the spatial relationship between mothers and offspring relative to controls...
January 9, 2017: Biology Open
https://www.readbyqxmd.com/read/28057871/copeptin-a-surrogate-marker-for-arginine-vasopressin-is-associated-with-disease-severity-and-progression-in-iga-nephropathy-patients
#15
Debbie Zittema, Jan A J G van den Brand, Stephan J L Bakker, Jack F Wetzels, Ron T Gansevoort
BACKGROUND: Besides its essential role for water homeostasis, arginine vasopressin (AVP) may have deleterious effects on the kidney. Copeptin, a surrogate marker for AVP, has been shown to be related to renal outcome in patients with diabetic nephropathy and polycystic kidney disease. We investigated the association of copeptin with disease severity and progression in immunoglobulin A nephropathy (IgAN). METHODS: We included a prospective cohort of 59 patients with biopsy proven IgAN...
January 5, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28057834/intergenerational-transmission-of-sociality-the-role-of-parents-in-shaping-social-behavior-in-monogamous-and-non-monogamous-species
#16
REVIEW
Allison M Perkeybile, Karen L Bales
Social bonds are necessary for many mammals to survive and reproduce successfully. These bonds (i.e. pair-bonds, friendships, filial bonds) are characterized by different periods of development, longevity and strength. Socially monogamous species display certain behaviors not seen in many other mammals, such as adult pair-bonding and male parenting. In our studies of prairie voles (Microtus ochrogaster) and titi monkeys (Callicebus cupreus), we have examined the neurohormonal basis of these bonds. Here, we discuss the evidence from voles that aspects of adolescent and adult social behavior are shaped by early experience, including changes to sensory systems and connections, neuropeptide systems such as oxytocin and vasopressin, and alterations in stress responses...
January 1, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28057567/prenatal-administration-of-letrozole-reduces-sdn-and-scn-volume-and-cell-number-independent-of-partner-preference-in-the-male-rat
#17
Sandra Olvera-Hernández, Miguel Tapia-Rodríguez, Dick F Swaab, Alonso Fernández-Guasti
During development, the exposure to testosterone, and its conversion to estradiol by an enzyme complex termed aromatase, appears to be essential in adult male rats for the expression of typical male sexual behavior and female-sex preference. Some hypothalamic areas are the supposed neural bases of sexual preference/orientation; for example, male-oriented rams have a reduced volume of the sexually dimorphic nucleus (oSDN), while in homosexual men this nucleus does not differ from that of heterosexual men. In contrast, homosexual men showed a larger number of vasopressinergic cells in the suprachiasmatic nucleus (SCN)...
January 3, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28057037/role-of-vasopressin-and-terlipressin-in-refractory-shock-compared-to-conventional-therapy-in-the-neonatal-and-pediatric-population-a-systematic-review-meta-analysis-and-trial-sequential-analysis
#18
Reem Masarwa, Gideon Paret, Amichai Perlman, Shimon Reif, Bruria Hirsh Raccah, Ilan Matok
BACKGROUND: Vasopressin (AVP) and terlipressin (TP) have been used as last-line therapy in refractory shock in children. However, the efficacy and safety profiles of AVP and TP have not been determined in pediatric refractory shock of different origins. We aimed to assess the efficacy and safety of the addition of AVP/TP therapy in pediatric refractory shock of all causes compared to conventional therapy with fluid resuscitation and vasopressor and inotropic therapy. METHODS: We conducted a systematic review, meta-analysis, and trial sequential analysis (TSA) comparing AVP and TP to conventional therapy...
January 5, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28056741/synaptic-inputs-of-neural-afferent-pathways-to-vasopressin-and-oxytocin-secreting-neurons-of-supraoptic-and-paraventricular-hypothalamic-nuclei
#19
Michele Iovino, Vito Angelo Giagulli, Brunella Licchelli, Emanuela Iovino, Edoardo Guastamacchia, Vincenzo Triggiani
Magnocellular neurosecretory neurons of the hypothalamic supraoptic (SON) and paraventricular (PVN) nuclei synthesize vasopressin and oxytocin in response to signals generated by osmoreceptors and baroreceptors and, respectively, coming from receptors of the nipples and cervix. These signals reach SON and PVN neurons via multisynaptic pathways involving several neurotransmitters and neuropeptides. Aim of this paper is the topographic description of particular afferent pathways involved in the regulation of VPergic and OTergic neurons and their synaptic inputs inducing the stimulus-secretion-coupling...
January 4, 2017: Endocrine, Metabolic & Immune Disorders Drug Targets
https://www.readbyqxmd.com/read/28056340/great-expectations-anticipatory-control-of-magnocellular-vasopressin-neurons
#20
Alan G Watts
Real-time activity measurements of genetically identified neuroendocrine vasopressin neurons show they can anticipate osmotic challenges. In this issue of Neuron, Mandelblat-Cerf et al. (2017) show that correlating these results with ongoing behavior and plasma osmolality points to the existence of brain networks that integrate exterosensory cues with interosensory signals to drive neuroendocrine output.
January 4, 2017: Neuron
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