نتایج جستجو برای: avp
تعداد نتایج: 2432 فیلتر نتایج به سال:
Familial neurohypophyseal diabetes insipidus (FNDI) is a disorder characterized by excess excretion of diluted urine (polyuria) and increased uptake of fluids (polydipsia). The disorder is caused by mutations affecting the AVP-NPII gene, resulting in absent or deficient secretion of the antidiuretic hormone arginine vasopressin (AVP) by the neurohypophysis. In this study we examined a three-gen...
We sought to determine whether there is differential involvement of different groups of hypothalamic arginine-vasopressin (AVP) synthesizing neurons in multiple system atrophy (MSA). Hypothalamus was obtained from five subjects with clinical diagnosis of MSA confirmed neuropathologically and five age-matched controls. Sections were immunostained for AVP, and cells with visible nuclei were count...
Abstract Introduction In subjects with asymptomatic ventricular preexcitation (AVP) guidelines recommend follow-up by non-invasive methods. However, in some patients accessory pathways (APs) show high-risk invasive parameters and risk of sudden death. Objectives To assess the association between stratification (NIRS IRS) AVP our center. Material methods Retrospective observational study 58 AVP,...
the antidiuretic effect of arginine vasopressin (avp) is mediated by the vasopressin v2 receptor. the docking study of avp as a ligand to v2 receptor helps in identifying important amino acid residues that might be involved in avp binding for predicting the lowest free energy state of the protein complex. whereas previous researchers were not able to detect the exact site of the ligand-receptor...
Arginine vasopressin-immunoreactive (AVP-ir) neurons in the bed nucleus of stria terminalis (BST) and medial amygdaloid nucleus are very responsive to gonadal hormones. After gonadectomy, these neurons lose their AVP immunoreactivity and stop expressing AVP mRNA. Testosterone treatment reverses these changes, acting via androgen as well as estrogen receptor-mediated mechanisms. Although AVP-ir ...
Data from conscious rats, dogs, and humans show that plasma arginine vasopressin (AVP) begins to exert vasoconstrictor activity at concentrations in the same range as those associated with maximum antidiuretic activity. Minimum pressor responses are observed with elevated plasma AVP, due in part to decreases of cardiac output and in part to withdrawal of sympathetic neural tone to various regio...
Neurohypophysial hormones are thought to be involved in alterations in fluid balance during pregnancy and delivery. In the course of normal pregnancy intravascular volume is increased whereas sodium restriction is thought to reduce plasma volume and cardiac output. In the present study, we measured the effect of long-term severe sodium restriction on vasopressin (AVP) and oxytocin (OT) levels d...
The purpose of this paper was to estimate arteriovenous passage (AVP) times, taking into account the non-uniform distribution of arrival times over the vessel diameter, and assessment of respective differences between 15 normal controls (N), 30 primary open-angle glaucoma (POAG) and 30 normal-pressure glaucoma (NPG) patients. Arrival times in retinal vessels were assessed from digitized scannin...
Arginine vasopressin (AVP), a nonapeptide hormone of posterior pituitary, reaches the central nervous system from systemic blood circulation with a difficulty because of the blood-brain barrier (BBB). The interest has been expressed in the use of the nasal route for delivery of AVP to the brain directly, exploiting the olfactory pathway. Our previous study has demonstrated that AVP in the brain...
Arginine vasopressin (AVP) was released in vitro in a pulsatile pattern from the hypothalamo-neurohypophyseal system (HNS) and from the hypothalamus during continuous hyperosmotic stimuli with NaCl or fructose. No significant difference was found in the AVP pulse frequency between the two kinds of hyperosmotic agents. AVP was released from the HNS in a dose-related manner under NaCl stimulation...
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