Anhedonia, meaning the loss of the normal experience of pleasure in life, can be one of the most troubling symptoms of depression. And also one for which we have relatively few treatments. We know that a small group of dopamine neurons in the ventral tegmentum (limbic system) which project to the prefrontal cortex, among other locations in the brain, are …
Beta Catenin and Depression
Beta catenin is a molecule that may play a key role in preventing depression in those exposed to stress, at least if mice and humans share the same biology. Beta catenin is involved in a number of quite different functions in the cell. To give you an idea, it may be involved in the development of cancer (it is a …
Anhedonia Treatment with Ketamine
The treatment of anhedonia and bipolar depression can be very difficult. An article published in Translational Psychiatry in October of 2014 highlights the role of glutametergic transmission in anhedonia and points to the potentially unique efficacy of ketamine in treating this stubborn problem. Anhedonia, the lack (an-) of pleasure (-hedonia), is one of the 2 main symptoms of a major …
Ketamine for Depression – Mechanism of Action
Ketamine for Depression: How does it work? We ran across a useful review of the basic science literature in an interview of David Nichols on the Psych Congress Network. http://www.psychcongress.com/video/ketamine-quick-guide-receptors-19116 Although ketamine blocks the NMDA subtype of glutamate receptors (blocks an excitatory neurotransmitter) the net effect seems to be an increase in excitatory neurotransmission. This image from Nature may help …