Mice missing a specific protein from their brains react to stress differently. The genetically engineered mice develop an imbalance in a hormone involved in stress responses, and during stressful situations, they behave as if they are depressed. Genetic variations in the same protein may be a significant cause of human depression, according to researchers at Washington University School of Medicine in St. Louis.
Their report will be published in the Proceedings of the National Academy of Sciences, appearing on-line at the journals website during the week of Dec. 27 to 31, 2004 and in an upcoming print issue. "A major obstacle to understanding depression has been finding what triggers its onset," says Maureen Boyle, predoctoral fellow and first author of the report. "We felt it was important to look at elements that regulate the bodys stress system."
In response to stress, the brain signals the adrenal gland to release hormones, including glucocorticoid, a hormone that preserves physiological equilibrium in many organs. Because proper levels of glucocorticoid are important for normal function, the brain closely monitors and regulates the hormone.
Jim Dryden | EurekAlert!
Nonstop Tranport of Cargo in Nanomachines
20.11.2018 | Max-Planck-Institut für molekulare Zellbiologie und Genetik
Researchers find social cultures in chimpanzees
20.11.2018 | Universität Leipzig
Max Planck researchers revel the nano-structure of molecular trains and the reason for smooth transport in cellular antennas.
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Researchers at the University of New Hampshire have captured a difficult-to-view singular event involving "magnetic reconnection"--the process by which sparse particles and energy around Earth collide producing a quick but mighty explosion--in the Earth's magnetotail, the magnetic environment that trails behind the planet.
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Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.
Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...
Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.
In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...
On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.
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20.11.2018 | Life Sciences
20.11.2018 | Physics and Astronomy