ecstasy (mdma; 3,4-methylenedioxymethylamphetamine) is an illicit drug that has been increasingly abused by young people. its effects include euphoria, enhanced sociability and heightened mental awareness. these come about via the increase of serotonin in both the central nervous system and the sympathetic nervous system. despite the drug’s prevalent abuse, serious or adverse effects are rare. ...

context the occurrence of intradialytic hypotension (idh) during hemodialysis (hd) continues to be a main problem in patients with esrd (end-stage kidney disease). it also negatively affects health-related quality of life. we aimed to determine vasopressin effect in decreasing idh. evidence acquisition we reviewed clinical and experimental literature in a variety of sources, including pubmed, c...

septic shock continues to be one of the leading causes of death in the intensive care units. when the shock state persists after adequate fluid resuscitation,  vasopressor therapy is required to improve and maintain adequate tissue/organ  perfusion in an attempt to improve survival and prevent the development of multiple organ dysfunction and failure. various studies have suggested that exogeno...

To investigate the possible role of arginine vasopressin in maintaining high blood pressure of spontaneously hypertensive rats (SHR), the effect of two arginine vasopressin pressor antagonists on mean arterial pressure and the pressor responsiveness to exogenous arginine vasopressin were studied in conscious, freely moving SHR and in Wistar-Kyoto rats (WKY). Intravenous injections of either d(C...

heart failure (hf) is still a major problem worldwide with high morbidity and mortality rates. the recently developed medication for hf is still incapable of reducing its morbidity and mortality, and clinical data supporting the efficacy and safety of its mainstay therapy remain insufficient. arginine-vasopressin (avp) plays important roles in circulatory and water homeostasis, one of which is ...

Identifying posterior pituitary hormones in body fluids or neurohypophysial extracts was heretofore partially achieved by using pharmacologic potency ratios or semispecific inactivation by thioglycolate or enzymes. Production of antisera against oxytocin and lysine-vasopressin has prompted us to test their specificity against lysine-vasopressin, arginine-vasopressin, arginine-vasotocin, and oxy...

OBJECTIVE To determine whether arginine vasopressin releases endothelium-derived nitric oxide (EDNO) from the epicardial coronary artery. METHODS We studied segments of canine left circumflex coronary arteries suspended in organ chambers to measure isometric force. The coronary artery segments were contracted with prostaglandin F2alpha (2 x 10-6M) and exposed to a unique, strong arginine vaso...

The biochemical mechanisms of adenylate cyclase desensitization in arginine vasopressin-responsive epithelial cells remain unclear. Preincubation of cultured rabbit renal cortical collecting tubular cells with arginine vasopressin leads to a 30-100% decline in arginine vasopressin-stimulated adenylate cyclase activity. This loss of adenylate cyclase activity is time- and arginine vasopressin co...

Neuroplastic changes in the amygdala account for emotional-affective aspects of pain and involve neuropeptides such as calcitonin gene-related peptide and corticotropin-releasing factor. Another neuropeptide system, central arginine vasopressin, has been implicated in neuropsychiatric disorders, but its role in pain-related emotional expression and neuroplasticity remains to be determined. Here...

To obtain data about peripheral concentrations of arginine vasopressin in head pain syndromes, the plasma arginine vasopressin secretory pattern in 12 adult male patients with cluster headache was evaluated. Blood samples for plasma arginine vasopressin and osmolality determinations were collected before, and at 15, 30, 45, 60, 90, and 120 minutes during a cluster attack. Blood pressure was als...