The effect of hypertonic saline administration or stalk transection on histamine and histamine N-methyltransferase in the rat posterior pituitary

1986 ◽  
Vol 18 (5-6) ◽  
pp. 494-498 ◽  
Author(s):  
Kenneth M. Verburg ◽  
Ronald R. Bowsher ◽  
Robert L. Zerbe ◽  
David P. Henry
1993 ◽  
Vol 57 (3) ◽  
pp. 416-421 ◽  
Author(s):  
David S. Jessop ◽  
Philip J. Larsen ◽  
Jens D. Mikkelsen ◽  
Stafford L. Lightman ◽  
Hardial S. Chowdrey

Neurosurgery ◽  
2006 ◽  
Vol 59 (2) ◽  
pp. 464
Author(s):  
Howard B. Levene ◽  
Carolyn J. Erb ◽  
John P. Gaughan ◽  
Christopher M. Loftus ◽  
Jack Jallo ◽  
...  

2005 ◽  
Vol 22 (Supplement 36) ◽  
pp. 18-19
Author(s):  
P. G. Al-Rawi ◽  
M.-Y. Tseng ◽  
J. Nortje ◽  
B. F Matta ◽  
P. J. Hutchinson ◽  
...  

1994 ◽  
Vol 266 (2) ◽  
pp. H822-H828 ◽  
Author(s):  
M. Goyer ◽  
H. Bui ◽  
L. Chou ◽  
J. Evans ◽  
L. C. Keil ◽  
...  

NO synthase is present in magnocellular neurons of supraoptic and paraventricular nuclei as well as in the posterior pituitary gland and may participate in control of vasopressin secretion. To test this possibility, experiments were performed in conscious, chronically prepared rabbits to determine the effect of NO synthesis inhibition with NG-nitro-L-arginine methyl ester hydrochloride (L-NAME) on basal vasopressin secretion and vasopressin responses to increased plasma osmolality (hypertonic saline infusion; P osm) and decreased blood pressure (nitroprusside infusion). L-NAME infusion (0.5 mg.kg-1 x min-1 i.v.) increased mean arterial pressure [MAP; 82.6 +/- 3.4 to 93.0 +/- 3.0 mmHg (P < 0.02)], decreased heart rate [HR; 242 +/- 12 to 209 +/- 9 beats/min (P < 0.02)], decreased plasma renin activity [PRA; 3.1 +/- 0.6 to 2.0 +/- 0.6 ng.ml-.2 h-1 (P < 0.001)], and increased plasma vasopressin concentration [P AVP; 2.2 +/- 0.3 to 4.5 +/- 1.0 pg/ml (P < 0.05)]. P(osm) did not change. Hypertonic saline infusion did not change MAP or HR but decreased PRA [4.3 +/- 0.8 to 0.9 +/- 0.2 ng.ml-1 x 2 h-1 (P < 0.01)], increased P(osm) [284 +/- 1 to 305 +/- 2 mosmol/kg H2O (P < 0.001)], and increased PAVP [2.8 +/- 0.3 to 12.7 +/- 2.7 pg/ml (P < 0.01)].(ABSTRACT TRUNCATED AT 250 WORDS)


Author(s):  
Ata Mahmoodpoor

Cytotoxic brain edema is an early complication of stroke which increases the possibility of secondary ischemia. Hypertonic solutions, mannitol and recently hypertonic saline (HS) has been considered for treatment of increased ICP. HS could decrease ICP especially in hypotensive patients with different mechanisms, direct effect on edema, decreasing inflammation which is mediated by attenuation of TNFa and IL-1b stimulation on Na-K-Cl cotransporter 1 and improvement of microcirculation. Improvement of microcirculation is so important for hypertonic solutions to be effective in ischemia especially focal ischemia. Based on the literature, hypertonic saline is more effective in decreasing cerebral edema than the equal volume of mannitol. The optimal dose and duration of therapy needs more trials. Caution should be performed with patients with moderate size hemispheric infarcts on presentation, race and genetic factors regarding osmotic therapy.Hypothermia has been rated as one of the most active modes of neuroprotection based on the results of different trials. Hypothermia in both ways, surface and intravascular, decreases cerebral metabolic rate of O2 and glucose and reduces brain oxygen consumption, inflammation and oxidative stress. Recent data continue to support consideration of therapeutic hypothermia for cerebral ischemia in larger clinical trials of acute ischemic stroke. By increasing the time window to therapy initiation and decreasing the treatment duration, selective intracarotid cold saline administration brings increased feasibility, potentially better outcomes and perhaps fewer complications compared with the whole body cooling. Hypothermia is now recommended as a targeted temperature management with defined protocol which should be started early; it may be performed pharmacologically in combination with other therapies. Applying hypothermia should be considered regarding its cost, using in awaked patients, re-warming protocol, incorporation of thrombolysis and its complications. 


2017 ◽  
Vol 39 ◽  
pp. 147-150 ◽  
Author(s):  
Kelly L. Maguigan ◽  
Bradley M. Dennis ◽  
Susan E. Hamblin ◽  
Oscar D. Guillamondegui

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