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DAAO and GlyT1 inhibitors in treatment of Alzheimers, OCD, depression, schizophrenia, and more

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Here is an abstract that discusses the current thoughts behind this kind of treatment:

https://www1.wfsbp-congress.org/guest/SciProgramSessionsList?SSN_ID=832

Currently the top two GlyT1 inhibitors available are sarcosine (an endogenous inhibitor) and Bitopertin (which will be marketed come 2015?).

D-amino acid oxidase (DAAO) inhibitors inhibit the breakdown of d-serine (and other D-amino acids). D-serine is an endogenous co-agonist of the NMDA glycine/d-serine site.

A few more links:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2905773/ more in depth explanation

https://www1.wfsbp-congress.org/guest/AbstractView?ABSID=11058 for OCD
https://www1.wfsbp-congress.org/guest/AbstractView?ABSID=11023 for depression
https://www1.wfsbp-congress.org/guest/AbstractView?ABSID=11059 sodium benzoate, a potential DAAO inhibiting agent
https://www1.wfsbp-congress.org/guest/AbstractView?ABSID=12051 for Alzheimers

There are likely other DAAO agents being tested, as I have read some material about this dating back at least 5 years. Sodium benzoate was something I just spotted on this particular site.