Rapid and chronic tolerance appear to operate via different neurobiological mechanisms and genes
"Alcohol tolerance" refers to the diminishing physiological, behavioral and subjective effects of alcohol that occur with repeated exposure to the drug. A study in the October issue of Alcoholism: Clinical & Experimental Research uses flies to define the genetic and mechanistic underpinnings of different forms of tolerance. "Tolerance is important and relevant to human drinking because its development both promotes and facilitates increasing intake of alcohol," said Karen H. Berger, senior scientist at the Ernest Gallo Clinic and Research Center. "Rapid and chronic tolerance are produced by different types of previous experience with alcohol. ’Rapid tolerance’ results from a single intoxicating dose, whereas ’chronic tolerance’ is produced by repeated or continuous exposure to alcohol over longer periods of time."
"Theories about the root causes of alcoholism often invoke the development of tolerance as an important event," added John Crabbe, director of the Portland Alcohol Center. "For example, if one must keep drinking more in order to get the same happy feeling, it is easy to see how with greater tolerance there could be a greater chance of developing into a problem drinker. Also, anyone who has developed enough of a drinking problem to earn a diagnosis of alcohol dependence or alcoholism has developed a great deal of chronic tolerance. Thus, tolerance is not only a part of the diagnostic criteria for alcohol dependence and alcoholism, but it may also be important for understanding the changes in brain mechanisms that lead some to develop problems with alcohol."
NIH scientists describe potential antibody treatment for multidrug-resistant K. pneumoniae
14.03.2018 | NIH/National Institute of Allergy and Infectious Diseases
Researchers identify key step in viral replication
13.03.2018 | University of Pittsburgh Schools of the Health Sciences
Animal photoreceptors capture light with photopigments. Researchers from the University of Göttingen have now discovered that these photopigments fulfill an...
On 15 March, the AWI research aeroplane Polar 5 will depart for Greenland. Concentrating on the furthest northeast region of the island, an international team...
The world’s second-largest ice shelf was the destination for a Polarstern expedition that ended in Punta Arenas, Chile on 14th March 2018. Oceanographers from...
At the 2018 ILA Berlin Air Show from April 25–29, the Fraunhofer Institute for Laser Technology ILT is showcasing extreme high-speed Laser Material Deposition (EHLA): A video documents how for metal components that are highly loaded, EHLA has already proved itself as an alternative to hard chrome plating, which is now allowed only under special conditions.
When the EU restricted the use of hexavalent chromium compounds to special applications requiring authorization, the move prompted a rethink in the surface...
At the ILA Berlin, hall 4, booth 202, Fraunhofer FHR will present two radar sensors for navigation support of drones. The sensors are valuable components in the implementation of autonomous flying drones: they function as obstacle detectors to prevent collisions. Radar sensors also operate reliably in restricted visibility, e.g. in foggy or dusty conditions. Due to their ability to measure distances with high precision, the radar sensors can also be used as altimeters when other sources of information such as barometers or GPS are not available or cannot operate optimally.
Drones play an increasingly important role in the area of logistics and services. Well-known logistic companies place great hope in these compact, aerial...
16.03.2018 | Event News
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