HOME >> MEDICINE >> NEWS
Research Explains Lithium's Dual Anti-Manic/Anti-Depressive Effect

MADISON, Wis. -- Researchers at the University of Wisconsin Medical School have solved the puzzle of how one drug -- lithium -- can effectively stabilize both the wild euphoria and the crushing melancholy that are the hallmark of manic depression, or bipolar disorder.

As reported in the current (July 7) Proceedings of the National Academy of Sciences, the researchers found that in mice brains, lithium exerts a push/pull effect on the neurotransmitter glutamate, eventually causing it to level off in a stable zone where it can control both extremes.

"Glutamate is the primary excitatory neurotransmitter, carrying messages instantaneously from one nerve cell to another in 85 percent of the brain," said UW Medical School professor of pharmacology Dr. Lowell Hokin, who directed the research. Other neurotransmitters include serotonin, dopamine, norepinephrine and acetylcholine.

Under normal circumstances, an impulse from a nerve cell releases a flood of message-bearing glutamate aimed at a neighboring neuron across the synapse. A structure on the end of the releasing nerve cell, called a reuptake transporter, then shuts off the signal by reabsorbing the glutamate, pumping it back into the cell for reuse.

If the reuptake mechanism malfunctions, inappropriate concentrations of neurotransmitter remain in the synapse. Hokin postulates abnormally low glutamate levels are involved in depression, while elevated levels are responsible for mania.

Nearly a half century ago, Australian psychiatrist John F. Cade discovered lithium's mood-stabilizing effect. It has long been the drug of choice in treating bipolar disorder, which affects approximately 2.5 million Americans. Despite some side effects, lithium usually successfully dampens the mood swings that in the most severe cases end in suicide, the dire result for one in five untreated or unresponsive bipolar patients.

In an earlier study (reported in PNAS, Aug. 30, 1994), Hokin and his colleague showed th
'"/>

Contact: Lisa Brunette
brunette@macc.wisc.edu
608-263-5830
University of Wisconsin-Madison
7-Jul-1998


Page: 1 2

Related medicine news :

1. Researchers search for first sign of congestive heart failure
2. Research offers hope of new treatments for liver damage
3. Research suggests possible blood test for multiple sclerosis
4. Researchers say breast cancer in Africa may provide clues to the disease in African-Americans
5. 2005 Award for Basic Research in Biological Mineralization
6. 2005 Craniofacial Biology Research Award
7. 2005 Research in Dental Caries Award
8. 2005 Research in Prosthodontics and Implants Award
9. 2005 Basic Research in Periodontal Disease Award
10. 2005 Research in Oral Biology Award
11. 2005 Pulp Biology Research Award

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:5/26/2017)... ... 26, 2017 , ... On May 24, the Congressional Budget Office (CBO) projected ... on May 4, would result in 23 million Americans losing their health insurance by ... Patient Protection and Affordable Care Act (ACA). , “It is clear from the ...
(Date:5/26/2017)... ... May 26, 2017 , ... Silver Birch of Hammond, a new assisted ... more than four acres of land at 5620 Sohl Avenue in Hammond, serves older ... building includes 125 studio and one-bedroom apartments. Each of the private apartments at Silver ...
(Date:5/26/2017)... ... May 26, 2017 , ... “When the Stars Lead ... is the creation of published author Laura Weigel Douglas, an avid reader who lives ... a house that sometimes feels like Green Hills Adventure Camp. She couldn’t be more ...
(Date:5/26/2017)... ... ... “Just What Happened in the Garden of Eden”: retells the stories of three Bible figures ... of published author, Penelope Colt, mother, trader, horse farmer, artist and a former GM journeyman. ... three. At six, they moved to Dayton, Ohio, where Penny graduated high school. ...
(Date:5/24/2017)... ... 2017 , ... Last month, representatives from Rendina Healthcare Real ... officials to celebrate the grand opening of the 87,000 square foot medical office/ICU ... its ongoing relationship with RWJBarnabas Health, New Jersey’s largest health system. Two years ...
Breaking Medicine News(10 mins):
(Date:5/8/2017)... Mich. , May 8, 2017  Diplomat Pharmacy, ... WRB Communications, Inc. ("WRB"), a health care service ... . WRB specializes in relationship management programs ... WRB will join ... Diplomat,s commercialization support services for manufacturers, biotech firms, and ...
(Date:5/6/2017)... N.Y. , May 5, 2017  Hill-Rom Holdings, ... will add approximately 100,000 square feet to its Welch ... September 2016 its commitment to bring more than 100 ... , where Welch Allyn has maintained a significant presence ... help accommodate these new positions, a large portion of ...
(Date:5/4/2017)... DIEGO , May 4, 2017 ... demonstrating its wireless, handheld ultrasound scanners this week ... Annual Scientific Meeting (ACOG) in San ... "Clarius is the perfect tool ... growth and heart rate, and evaluate pregnancy-related complications ...
Breaking Medicine Technology:
Cached News: