A translational approach for NMDA receptor profiling as a vulnerability biomarker for depression and schizophrenia

The change in plasma arginine vasopressin concentration (P[AVP]) in response to osmotic stimulation (POsm) can be used as a biomarker for NMDA receptor signalling in schizophrenia and depression, distinguishing between these mental illnesses?
In response to hyperosmotic challenge, depressed subjects showed increased P[AVP] response in comparison with healthy control and schizophrenic subjects. 

 Read the research paper:
http://onlinelibrary.wiley.com/doi/10.1113/EP086212/full

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