The Novosibirsk researchers have managed to establish connection between mice’s aggressive behavior, biochemical modifications in their brain and the genes that cause those modifications.
Aggressive behavior is to a large extent genetically determined. The evidence of that are experiments with laboratory animals, including their successful selection into high- and low-aggressive lines. However, the “aggression gene” as such will hardly be ever found. Nevertheless, the researchers have managed to find the genes that are connected with aggressive behavior. Thus, researchers of the Institute of Cytology and Genetics (Siberian Branch, Russian Academy of Sciences) and Novosibirsk Institute of Bioorganic Chemistry (Siberian Branch, Russian Academy of Sciences, Novosibirsk) have analyzed biochemical modifications taking place in the brain of mice after aggressive collisions and have found the genes responsible for that.
Male mice scuffled with each other every day: the stronger ones used to attack and assault, the weaker ones – used to run away or posed as the subordinated. As a result of recurring fights some males won victories all the time and gained “experience of victors” - they became even more aggressive. Others got into position of “ chronical victims” who are in the state of constant stress. Both types changed their behavior. However, as the researchers have demonstrated, biochemistry of brain changed as well. The researchers measured the content of basic neuromediators – i.e. the substances that transmit a signal from one nerve cell to another – in the brain of winner mice and victim mice, and the products of their chemical transformations. The researchers were most interested in the dopamine and serotonin neuromediators. It has turned out that the recurring aggression experience of the “winners” leads to activation of the neurons system that uses dopamine (i.e., the dopaminergic system). However, the recurring experience of defeats with the “victims” causes weakening the dopaminergic system work, but in return, it activates the system of neurons that use serotonin – the serotonergic system. Apparently, these two systems work in antiphase.
Sergey Komarov | alfa
Improving memory with magnets
28.03.2017 | McGill University
Graphene-based neural probes probe brain activity in high resolution
28.03.2017 | Graphene Flagship
The Institute of Semiconductor Technology and the Institute of Physical and Theoretical Chemistry, both members of the Laboratory for Emerging Nanometrology (LENA), at Technische Universität Braunschweig are partners in a new European research project entitled ChipScope, which aims to develop a completely new and extremely small optical microscope capable of observing the interior of living cells in real time. A consortium of 7 partners from 5 countries will tackle this issue with very ambitious objectives during a four-year research program.
To demonstrate the usefulness of this new scientific tool, at the end of the project the developed chip-sized microscope will be used to observe in real-time...
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
20.03.2017 | Event News
14.03.2017 | Event News
07.03.2017 | Event News
28.03.2017 | Life Sciences
28.03.2017 | Information Technology
28.03.2017 | Physics and Astronomy