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Related Experiment Video

Updated: Nov 4, 2025

An Olfactory Preference Test for Measuring Olfactory Hedonic Biases in Mouse Models of Depression

An Olfactory Preference Test for Measuring Olfactory Hedonic Biases in Mouse Models of Depression

Published on: July 11, 2025

Membrane molecules for mood.

David A Slattery¹, John F Cryan²

¹Department of Psychiatry, Psychosomatic Medicine and Psychotherapy, University Hospital Frankfurt, Goethe University Frankfurt am Main, Germany.

Trends in Neurosciences

|May 31, 2021

Summary

This summary is machine-generated.

Antidepressants may work faster than previously thought. New research shows they can directly bind to the TRKB receptor, influencing neuronal plasticity and potentially speeding up treatment for depression.

Keywords:

BDNF antidepressant depression plasticity

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Area of Science:

Neuroscience
Pharmacology
Molecular Biology

Background:

The neurotrophic hypothesis of depression suggests antidepressants act indirectly on neuronal plasticity.
The delayed onset of antidepressant action has been a long-standing puzzle in psychiatric research.

Purpose of the Study:

To investigate the direct molecular targets of antidepressants.
To challenge the traditional understanding of antidepressant mechanisms of action.

Main Methods:

Biochemical assays to test direct binding of antidepressants to receptors.
Cellular models to assess downstream signaling pathways.

Main Results:

Antidepressants were found to directly bind to the neurotrophin TRKB receptor.
This direct interaction mediates the effects on neuronal plasticity, challenging the indirect mechanism hypothesis.

Conclusions:

The findings suggest a novel, direct mechanism for antidepressant action.
This discovery may pave the way for developing faster-acting depression treatments.