Memory loss associated with marijuana use is caused by the drug's interference with the brain's natural protein synthesis machinery, according to a study published in Nature Neuroscience.
Though it has been documented that marijuana impairs memory, the precise mechanism for this memory impairment was previously unknown. AndrÃ©s Ozaita and colleagues focused on THC, the main psychoactive chemical compound in marijuana, which acts on a specific class of receptors known as cannabinoid receptors. These receptors are known to affect the connection strength between neurons.
The scientists found that THC increases the activity of a pathway that promotes protein synthesis in the mouse brain. This transient increase of protein synthesis was mediated specifically by cannabinoid receptors expressed on the brain's inhibitory neurons, and correlated with long-term memory deficits in mice. Interestingly, the authors also found that inhibition of this signaling pathway by rapamycin, an immunosuppressant drug used to prevent organ rejection following transplantation, prevents THC-induced amnesia in mice.
Andres Ozaita (Universitat Pompeu Fabra, Barcelona, Spain)
Abstract available online.
(C) Nature Neuroscience press release.
Message posted by: Trevor M. D'Souza
Bookmark and Share this page (what is this?)
Social bookmarking allows users to save and categorise a personal collection of bookmarks and share them with others. This is different to using your own browser bookmarks which are available using the menus within your web browser.
Use the links below to share this article on the social bookmarking site of your choice.
Read more about social bookmarking at Wikipedia - Social Bookmarking