Navigation Links
Elevated levels of sodium blunt response to stress, study shows

CINCINNATIAll those salty snacks available at the local tavern might be doing more than increasing your thirst: They could also play a role in suppressing social anxiety.

New research from the University of Cincinnati (UC) shows that elevated levels of sodium blunt the body's natural responses to stress by inhibiting stress hormones that would otherwise be activated in stressful situations. These hormones are located along the hypothalamic-pituitary-adrenal (HPA) axis, which controls reactions to stress.

The research is reported in the April 6, 2011, issue of The Journal of Neuroscience, the official journal of the Society for Neuroscience.

"We're calling this the Watering Hole Effect," says Eric Krause, PhD, a research assistant professor in the basic science division of UC's department of psychiatry and behavioral neuroscience and first author of the study. "When you're thirsty, you have to overcome some amount of fear and anxiety to approach a communal water source. And you want to facilitate those interactionsthat way everyone can get to the water source."

Krause and his team dehydrated laboratory rats by giving them sodium chloride, then exposed them to stress. Compared with a control group, the rats that received the sodium chloride secreted fewer stress hormones and also displayed a reduced cardiovascular response to stress.

"Their blood pressure and heart rate did not go up as much in response to stress as the control group's, and they returned to resting levels more quickly," says Krause.

"Also, in a social interaction paradigm with two rats interacting, we found them to be more interactive and less socially anxious."

Further research, through examination of brain and blood samples from the rats, showed that the same hormones that act on kidneys to compensate for dehydration also act on the brain to regulate responsiveness to stressors and social anxiety.

The elevated sodium level, known as hypernatremia, limited stress responses by suppressing the release of the pro-stress hormone angiotensin II. Conversely, it increased the activity of oxytocin, an anti-stress hormone.

Further research, Krause says, will examine these hormones and neurocircuits to investigate their role in social anxiety disorders and autism, a neurological disorder whose characteristics include social impairment.

"Oxytocin deficiency has been implicated in autism in previous studies," says Krause. "We'd like to investigate the possibility that dysregulation in fluid balance during pregnancy could result in autistic disorders."


Contact: Keith Herrell
University of Cincinnati Academic Health Center

Related medicine news :

1. Biologics-naive juvenile idiopathic arthritis patients have elevated risk of cancer
2. Elevated heart rate over time linked to significant risk of death
3. Compounds in non-stick cookware may be associated with elevated cholesterol in children and teens
4. Fathers incarceration associated with elevated risks of marijuana and other illegal drug use
5. Common Eye Condition Linked to Elevated Eye Pressure
6. Death of Loved One May Trigger Elevated Heart Rate
7. Up to 8 percent of Canadian children suffer from elevated blood pressure
8. Study of sarcoid-like granulomatous pulmonary disease finds elevated rates in WTC responders
9. Vegans elevated heart risk requires omega-3s and B12
10. Low levels of natural antibodies behind stroke
11. LifeScan Recalls Specific Lots of Consumer and Professional OneTouch(R) SureStep(R) Test Strips Due To Inaccurate Readings at High Levels
Post Your Comments:
(Date:11/29/2015)... ... November 30, 2015 , ... ... new company, Sublime Beauty NATURALS®. All products are available on Amazon or its ... oils, organic facial serums and USDA Certified Organic Sesame Oil for Oil Pulling," ...
(Date:11/29/2015)... Orion, Clarkston, Metamora, Michigan (PRWEB) , ... November 29, 2015 , ... ... football games, basketball games. Things that as a Mother and Wife would love to ... was no mistake that I just happened to call Dr. Zaidan first. They have ...
(Date:11/29/2015)... ... November 29, 2015 , ... NewsWatch featured X-wing as ... available to consumers. Amanda Forstrom, a technology expert and special reporter for NewsWatch, conducted ... reality in the future. , It’s the future because flying cars are about to ...
(Date:11/29/2015)... ... ... While conventional walkers afford considerable help with mobility, their design does not ... inventor from Uniontown, Pa., has found a way to address those needs. , He ... walker to improve the user’s quality of life. To begin with, this improved mobility ...
(Date:11/29/2015)... Viejo, CA (PRWEB) , ... November 29, 2015 ... ... an all new and unique analog distortion effect tool designed specially for Final ... their footage, and create limiltess looks with the easy-to-use modification controls. Destoying and ...
Breaking Medicine News(10 mins):
(Date:11/29/2015)... Iowa , Nov. 29, 2015 ... ultrasound guidance technology at the Radiological Society of ... in Chicago November 29 ... system is designed to offer customers unrivaled versatility, ... --> ...
(Date:11/27/2015)... YORK , November 27, 2015 ... system is set to go online. The potential to ... processes is vast and far from fully exploited as ... to patient health records, either via mobile tablet or ... ) --> ) --> ...
(Date:11/27/2015)... Research and Markets ( ) has ... Market 2015-2019" report to their offering. ... report, the author the present scenario and growth prospects ... calculate the market size, the report considers revenue generated ... IUDs and copper IUDs. The report forecasts the global ...
Breaking Medicine Technology: