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Zelquistinel

Investigational antidepressant compound From Wikipedia, the free encyclopedia

Zelquistinel
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Zelquistinel (GATE-251, formerly AGN-241751) is an orally active small-molecule NMDA receptor modulator which is under development for the treatment of major depressive disorder (MDD) by Syndeio Biosciences, and previously by Allergan.[1][2][3]

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Pharmacology

Zelquistinel acts through a unique binding site on the NMDA receptor, independent of the glycine site, to modulate receptor activity and enhance NMDAR-mediated synaptic plasticity.[4][5] Its mechanism of action is similar to that of rapastinel. However, unlike rapastinel, zelquistinel is orally bioavailable, exhibits increased potency, and has improved drug properties.[2][3][5] The mean half-life of Zelquistinel is reported to be from 1.21 to 2.06 hours, reaching peak plasma concentrations 30 minutes after administration.[6]

In preclinical studies, single doses of zelquistinel demonstrated both rapid-acting (24-hours) and sustained (1-week) antidepressant-like effects and enhancement of long-term synaptic plasticity.[6]

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Clinical development

On July 23, 2018, the U.S. FDA granted Fast Track designation to the development of zelquistinel as an investigational new treatment for major depressive disorder.[7]

In 2019, Allergan completed an exploratory phase IIa clinical trial of once-weekly oral zelquistinel in major depressive disorder.[1][3][8] By week three, the two highest doses studied reduced MADRS depression scores by 9.5 and 10.6 points compared to a 7.7-point reduction with placebo. This result was considered statistically and clinically significant.[8]

As of 2025, zelquistinel is undergoing a phase IIb clinical trial for depression sponsored by Syndeio Biosciences.[2]

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See also

References

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