The Development of Rapastinel (Formerly GLYX-13); A Rapid Acting and Long Lasting Antidepressant

Title:The Development of Rapastinel (Formerly GLYX-13); A Rapid Acting and Long Lasting Antidepressant

Volume: 15 Issue: 1

Author(s): Joseph R. Moskal, Jeffrey S. Burgdorf, Patric K. Stanton, Roger A. Kroes, John F. Disterhoft, Ronald M. Burch and M. Amin Khan

Affiliation:

Keywords: Antidepressant, glycine site, GLYX-13, major depressive disorder, NMDA receptor, rapastinel, rapid acting.

Abstract: Background: Rapastinel (GLYX-13) is a NMDA receptor modulator with glycine-site partial agonist properties. It is a robust cognitive enhancer and shows rapid and long-lasting antidepressant properties in both animal models and in humans.

Methods: Rapastinel was derived from a monoclonal antibody, B6B21, is a tetrapeptide (threonine-proline-proline-threonine-amide) obtained from amino acid sequence information obtained from sequencing one of the hypervariable regions of the light chain of B6B21. The in-vivo and in-vitro pharmacology of rapastinel was examined.

Results: Rapastinel was found to be a robust cognitive enhancer in a variety of learning and memory paradigms and shows marked antidepressant-like properties in multiple models including the forced swim (Porsolt), learned helplessness and chronic unpredictable stress. Rapastinel’s rapid-acting antidepressant properties appear to be mediated by its ability to activate NMDA receptors leading to enhancement in synaptic plasticity processes associated with learning and memory. This is further substantiated by the increase in mature dendritic spines found 24 hrs after rapastinel treatment in both the rat dentate gyrus and layer five of the medial prefrontal cortex. Moreover, ex vivo LTP studies showed that the effects of rapastinel persisted at least two weeks post-dosing.

Conclusion: These data suggest that rapastinel has significant effects on metaplasticity processes that may help explain the long lasting antidepressant effects of rapastinel seen in the human clinical trial results.

Cite this article as:

Moskal R. Joseph, Burgdorf S. Jeffrey, Stanton K. Patric, Kroes A. Roger, Disterhoft F. John, Burch M. Ronald and Khan Amin M., The Development of Rapastinel (Formerly GLYX-13); A Rapid Acting and Long Lasting Antidepressant, Current Neuropharmacology 2017; 15 (1) . https://dx.doi.org/10.2174/1570159X14666160321122703

DOI https://dx.doi.org/10.2174/1570159X14666160321122703	Print ISSN 1570-159X
Publisher Name Bentham Science Publisher	Online ISSN 1875-6190