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Arginine vasopressin

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https://www.readbyqxmd.com/read/29216295/alpha-1-antichymotrypsin-is-involved-in-astrocyte-injury-in-concert-with-arginine-vasopressin-during-the-development-of-acute-hepatic-encephalopathy
#1
Jonghyuk Park, Takahiro Masaki, Yoshihiro Mezaki, Hiroshi Yokoyama, Mariko Nakamura, Haruka Maehashi, Takahiko J Fujimi, Sabine S Gouraud, Keisuke Nagatsuma, Madoka Nakagomi, Naofumi Kimura, Tomokazu Matsuura
BACKGROUND AND AIMS: We developed a bio-artificial liver (BAL) using a radial-flow bioreactor and rescued mini-pig models with lethal acute liver failure (ALF). The point of the rescue is the recovery from hepatic encephalopathy (HE). HE on ALF has sometimes resulted in brain death following brain edema with astrocyte swelling. Several factors, including ammonia and glutamine, have been reported to induce astrocyte swelling and injury. However, many clinicians believe that there are any other factors involved in the development of HE...
2017: PloS One
https://www.readbyqxmd.com/read/29212780/excitatory-gabaergic-action-and-increased-vasopressin-synthesis-in-hypothalamic-magnocellular-neurosecretory-cells-underlie-the-high-plasma-level-of-vasopressin-in-diabetic-rat
#2
Young-Beom Kim, Woong Bin Kim, Won Woo Jung, Xiangyan Jin, Yoon Sik Kim, Byoungjae Kim, Hee Chul Han, Gene D Block, Christopher S Colwell, Yang In Kim
Diabetes mellitus (DM) is associated with increased plasma levels of arginine-vasopressin (AVP) which may aggravate hyperglycemia and nephropathy. However, the mechanisms by which DM may cause the increased AVP levels are not known. Electrophysiological recordings in the supraoptic nucleus (SON) slices from streptozotocin-induced DM model (STZ) rats and vehicle-treated control rats revealed that GABA functions generally as an excitatory neurotransmitter in the AVP neurons of STZ rats, whereas it evoked usually inhibitory responses in the cells of control animals...
December 6, 2017: Diabetes
https://www.readbyqxmd.com/read/29187641/vasopressin-stimulates-the-proliferation-and-differentiation-of-red-blood-cell-precursors-and-improves-recovery-from-anemia
#3
Balázs Mayer, Krisztián Németh, Miklós Krepuska, Vamsee D Myneni, Dragan Maric, John F Tisdale, Matthew M Hsieh, Naoya Uchida, Heon-Jin Lee, Michael J Nemeth, Kenn Holmbeck, Constance Tom Noguchi, Heather Rogers, Soumyadeep Dey, Arne Hansen, Jeffrey Hong, Ian Chow, Sharon Key, Ildikó Szalayova, Jerome Pagani, Károly Markó, Ian McClain-Caldwell, Lynn Vitale-Cross, W Scott Young, Michael J Brownstein, Éva Mezey
Arginine vasopressin (AVP) made by hypothalamic neurons is released into the circulation to stimulate water resorption by the kidneys and restore water balance after blood loss. Patients who lack this antidiuretic hormone suffer from central diabetes insipidus. We observed that many of these patients were anemic and asked whether AVP might play a role in red blood cell (RBC) production. We found that all three AVP receptors are expressed in human and mouse hematopoietic stem and progenitor cells. The AVPR1B appears to play the most important role in regulating erythropoiesis in both human and mouse cells...
November 29, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/29186911/prostaglandin-e2-in-the-regulation-of-water-transport-in-renal-collecting-ducts
#4
REVIEW
Yuyuan Li, Yuanyi Wei, Feng Zheng, Youfei Guan, Xiaoyan Zhang
The kidney plays a central role in the regulation of the body water balance. The process of targeting the water channel aquaporin-2 (AQP2) on the apical plasma membrane of the collecting duct (CD) principal cells is mainly regulated by the antidiuretic peptide hormone arginine vasopressin (AVP), which is responsible for the maintenance of water homeostasis. Recently, much attention has been focused on the local factors modulating renal water reabsorption by AQP2 in the collecting ducts, especially prostaglandin E2 (PGE₂)...
November 27, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29184535/sex-differences-in-the-regulation-of-offensive-aggression-and-dominance-by-arginine-vasopressin
#5
REVIEW
Joseph I Terranova, Craig F Ferris, H Elliott Albers
Arginine-vasopressin (AVP) plays a critical role in the regulation of offensive aggression and social status in mammals. AVP is found in an extensive neural network in the brain. Here, we discuss the role of AVP in the regulation of aggression in the limbic system with an emphasis on the critical role of hypothalamic AVP in the control of aggression. In males, activation of AVP V1a receptors (V1aRs) in the hypothalamus stimulates offensive aggression, while in females activation of V1aRs inhibits aggression...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29183979/vasopressin-excites-interneurons-to-suppress-hippocampal-network-activity-across-a-broad-span-of-brain-maturity-at-birth
#6
Albert Spoljaric, Patricia Seja, Inkeri Spoljaric, Mari A Virtanen, Jenna Lindfors, Pavel Uvarov, Milla Summanen, Ailey K Crow, Brian Hsueh, Martin Puskarjov, Eva Ruusuvuori, Juha Voipio, Karl Deisseroth, Kai Kaila
During birth in mammals, a pronounced surge of fetal peripheral stress hormones takes place to promote survival in the transition to the extrauterine environment. However, it is not known whether the hormonal signaling involves central pathways with direct protective effects on the perinatal brain. Here, we show that arginine vasopressin specifically activates interneurons to suppress spontaneous network events in the perinatal hippocampus. Experiments done on the altricial rat and precocial guinea pig neonate demonstrated that the effect of vasopressin is not dependent on the level of maturation (depolarizing vs...
November 28, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29177155/novel-de-novo-avpr2-variant-in-a-patient-with-congenital-nephrogenic-diabetes-insipidus
#7
Shivani Joshi, Per Brandstrom, Niels Gregersen, Søren Rittig, Jane Hvarregaard Christensen
Early diagnosis and treatment of congenital nephrogenic diabetes insipidus (CNDI) are essential due to the risk of intellectual disability caused by repeated episodes of dehydration and rapid rehydration. Timely genetic testing for disease-causing variants in the arginine vasopressin receptor 2 (AVPR2) gene is possible in at-risk newborns with a known family history of X-linked CNDI. In this study, a Swedish male with no family history was diagnosed with CNDI at 6 months of age during an episode of gastroenteritis...
September 2017: Case Reports in Nephrology and Dialysis
https://www.readbyqxmd.com/read/29163374/erratum-arginine-vasopressin-effects-on-subjective-judgments-and-neural-responses-to-same-and-other-sex-faces-in-men-and-women
#8
(no author information available yet)
[This corrects the article on p. 200 in vol. 8, PMID: 28871239.].
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29148979/role-of-caftaric-acid-in-lead-associated-nephrotoxicity-in-rats-via-antidiuretic-antioxidant-and-anti-apoptotic-activities
#9
Khaled M M Koriem, Mahmoud S Arbid
Background Lead is a toxic metal that is widely distributed in the environment where caftaric acid (CA) is the ester form of caffeic acid where CA is the major dietary polyphenol present in various foods and beverages. The aim of this study was to evaluate the effect of CA in lead acetate (LA)-associated nephrotoxicity through antidiuretic, antioxidant and anti-apoptotic activities. Methods Forty-eight male albino rats divided into six equal groups; group 1 control injected intraperitoneally (ip) with saline (1 mL/kg of bw) over two weeks period, group 2 injected ip with CA (80 mg/kg of bw) over two weeks period, groups 3, 4, 5 and 6 injected ip with 100 μmol/kg of bw LA over two weeks period where groups 4, 5 & 6 co-injected ip with 1-deamino-8-D-arginine vasopressin (dDAVP) drug (1 mg/kg of bw), CA (40 mg/kg of bw), and CA (80 mg/kg of bw), respectively...
November 17, 2017: Journal of Complementary & Integrative Medicine
https://www.readbyqxmd.com/read/29146932/activation-of-endogenous-arginine-vasopressin-neurons-inhibit-food-intake-by-using-a-novel-transgenic-rat-line-with-dreadds-system
#10
Mitsuhiro Yoshimura, Kazuaki Nishimura, Haruki Nishimura, Satomi Sonoda, Hiromichi Ueno, Yasuhito Motojima, Reiko Saito, Takashi Maruyama, Yuki Nonaka, Yoichi Ueta
Various studies contributed to discover novel mechanisms of central arginine vasopressin (AVP) system responsible for the behaviour albeit endogenous vasopressin activation. We established a novel transgenic rat line which expresses both human muscarinic acetylcholine receptors (hM3Dq), of which ligand is clozapine-N-oxide (CNO), and mCherry fluorescence specifically in AVP neurons. The mCherry neurons that indicate the expression of the hM3Dq gene were observed in the suprachiasmatic (SCN), supraoptic (SON), and paraventricular nuclei (PVN)...
November 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29146141/the-myth-of-water-and-salt-from-aquaretics-to-tenapanor
#11
REVIEW
Luca Visconti, Valeria Cernaro, Sebastiano Calimeri, Antonio Lacquaniti, Francesca De Gregorio, Carlo Alberto Ricciardi, Viviana Lacava, Domenico Santoro, Michele Buemi
The impact of water intake has been studied in several renal diseases. For example, increasing water intake is useful to prevent primary and secondary nephrolithiasis. In autosomal dominant polycystic kidney disease, arginine vasopressin (AVP) is involved in the progression of the disease, and water intake could play a therapeutic role by inhibiting the synthesis of AVP, but its efficacy is still controversial. Conversely, the use of aquaretics, which are antagonists of AVP V2 receptors, results in the reduction of the increase rate of total kidney volume with a slower decline of glomerular filtration rate...
November 14, 2017: Journal of Renal Nutrition
https://www.readbyqxmd.com/read/29129646/extracellular-volume-depletion-and-resultant-hypotonic-hyponatremia-a-novel-translational-approach
#12
Philip J G M Voets, Roderick P P W M Maas
Although several methods currently exist to determine that a person is hypovolemic, it often remains very challenging to accurately estimate the effective circulating volume or amount of intravascular volume depletion in a non-controlled setting. This depletion of intravascular volume can have many causes and is frequently accompanied by hypotonic hyponatremia as a result of hypovolemia-induced release of arginine vasopressin (AVP) from the posterior pituitary gland. Here, we derive a novel, comprehensible equation that provides a theoretical insight into the complex interrelationship between the degree of isotonic volume depletion and the resultant change in plasma sodium concentration...
November 10, 2017: Mathematical Biosciences
https://www.readbyqxmd.com/read/29128567/haploinsufficiency-of-hnrnp-u-changes-activity-pattern-and-metabolic-rhythms
#13
Beibei Lai, Jianghuan Zou, Zhaoyu Lin, Zhipeng Qu, Anying Song, Ying Xu, Xiang Gao
The neuropeptides arginine vasopressin (Avp) and vasoactive intestinal polypeptide (Vip) are critical for the communication and coupling of suprachiasmatic nucleus neurons, which organize daily rhythms of physiology and behavior in mammals. However, how these peptides are regulated remains uncharacterized. We found that heterogeneous nuclear ribonucleoprotein U (hnRNP U) is essential for the expression of Avp and Vip. Loss of one copy of the Hnrnpu gene resulted in fragmented locomotor activities and disrupted metabolic rhythms...
November 9, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/29126725/conformationally-rigid-derivatives-of-way-267-464-synthesis-and-pharmacology-at-the-human-oxytocin-and-vasopressin-1a-receptors
#14
William T Jorgensen, Damien W Gulliver, Timothy A Katte, Eryn L Werry, Tristan A Reekie, Mark Connor, Michael Kassiou
WAY-267,464 (1) and twelve conformationally rigid analogues (3a-f-4a-f) were synthesised, characterised and evaluated in cellular assays with the aim of systematically exploring interactions with the oxytocin receptor (OTR). Each analogue was evaluated in radioligand binding displacement assays at both human OTR and arginine vasopressin 1a receptors (V1aR). Physiological characterisation was determined by whole cell IP1 accumulation assays on stably transfected human embryonic kidney (HEK) cells. Incorporation of the rigid, optionally substituted benzene ring abolished OTR activity and diminished V1aR pharmacology when compared to 1...
October 23, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29125546/hereditary-nephrogenic-diabetes-insipidus-pathophysiology-and-possible-treatment-an-update
#15
REVIEW
Serena Milano, Monica Carmosino, Andrea Gerbino, Maria Svelto, Giuseppe Procino
Under physiological conditions, excessive loss of water through the urine is prevented by the release of the antidiuretic hormone arginine-vasopressin (AVP) from the posterior pituitary. In the kidney, AVP elicits a number of cellular responses, which converge on increasing the osmotic reabsorption of water in the collecting duct. One of the key events triggered by the binding of AVP to its type-2 receptor (AVPR2) is the exocytosis of the water channel aquaporin 2 (AQP2) at the apical membrane the principal cells of the collecting duct...
November 10, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29123651/recent-advances-in-managing-and-understanding-enuresis
#16
REVIEW
Charlotte Van Herzeele, Johan Vande Walle, Karlien Dhondt, Kristian Vinter Juul
Enuresis, particularly in children during sleep, can be a debilitating condition, affecting the quality of life of the child and his or her family. The pathophysiology of nocturnal enuresis, though not clear, revolves around the inter-related mechanisms of overactive bladder, excessive nocturnal urine production, and sleep fragmentation. The first mechanism is more related to isolated nocturnal voiding, whereas the latter two are more related to nocturnal enuresis, in which circadian variations in arginine vasopressin hormone play a key role...
2017: F1000Research
https://www.readbyqxmd.com/read/29120656/-syndrome-of-inappropriate-antidiuresis-and-the-current-management-of-hyponatremia
#17
Ivica Lazúrová
Hyponatremia defined as serum sodium lower than 135 mmol/L is the most common electrolyte abnormality in outpatients and also in hospitalized patients. It has been documented that hyponatremia is associated with significantly higher morbidity, mortality and longer hospitalization stay. Hyponatremia is manifested by variety of symptoms, from mild up to life threatening conditions. Syndrome of inappropriate antidiuresis (SIAD) is the most common type of hyponatremia. This article presents new aspects in the etiology, diagnosis, differential diagnosis ant treatment of the SIAD according to European guidelines...
2017: Vnitr̆ní Lékar̆ství
https://www.readbyqxmd.com/read/29120013/primary-polydipsia-in-the-medical-and-psychiatric-patient-characteristics-complications-and-therapy
#18
Clara Sailer, Bettina Winzeler, Mirjam Christ-Crain
Primary polydipsia (PP) has been defined as excessive intake of fluids. However, the pathogenesis of PP remains unexplored. Different theories include a dysfunction in the thirst mechanism, involvement of the hippocampus, stress-reducing behaviour and lesion occurrences in specific areas of the brain. Most studies have been performed in the psychiatric setting, indicating that PP coincides with schizophrenia, anxiety disorder and depression. However, an increasing number of case reports emphasise the incidence of PP in non-psychiatric patients...
November 9, 2017: Swiss Medical Weekly
https://www.readbyqxmd.com/read/29108420/inhibitor-risk-stratification-and-individualized-treatment-in-patients-with-nonsevere-hemophilia-a-a-single-institution-practice-audit
#19
Haowei Linda Sun, Stella Chan, Paul Yenson, Shannon Jackson
Inhibitor risk in nonsevere hemophilia A increases with cumulative factor VIII (FVIII) exposure days and high-risk mutations. A standardized approach to minimize inhibitor risk is warranted. Following establishment of a systematic approach to reduce inhibitor risk in nonsevere hemophilia, we evaluated the uptake of these strategies into clinical practice. All adult males with nonsevere hemophilia A followed by British Columbia Adult Hemophilia Program from 2004 to 2016 were included in this retrospective audit...
January 1, 2017: Clinical and Applied Thrombosis/hemostasis
https://www.readbyqxmd.com/read/29108272/up-regulated-expression-of-oxytocin-mrna-in-peripheral-blood-lymphocytes-from-first-episode-schizophrenia-patients
#20
Xiudeng Yang, Yamei Tang, Qinling Wei, Bing Lang, Huai Tao, Xianghui Zhang, Yong Liu, Aiguo Tang
Schizophrenia (SZ) is a severe neuropsychiatric disorder with significant social cognition impairment. Increasing evidence has suggested that neuropeptides oxytocin (OXT) and arginine vasopressin (AVP) are important mediators of complex social cognition and behavior associates with SZ. In the present study, forty-three first-episode schizophrenia (FES) patients and forty-seven healthy controls (HC) were included. The peripheral mRNA expression of OXT, OXT receptor (OXTR), AVP, AVP 1a receptor (AVPR1a) and CD38 was determined by real-time quantitative polymerase chain reaction (RT-qPCR)...
October 3, 2017: Oncotarget
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