(2R,6R)-hydroxynorketamine rescues chronic stress-induced depression-like behavior through its actions in the midbrain periaqueductal gray

Dylan Chou, Hsien Yu Peng, Tzer Bin Lin, Cheng Yuan Lai, Ming Chun Hsieh, Yang Cheng Wen, An Sheng Lee, Hsueh Hsiao Wang, Po Sheng Yang, Gin Den Chen, Yu Cheng Ho

Research output: Contribution to journalArticle

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Abstract

It has been widely reported that ketamine rescues chronic stress-induced depression-like behavior, but the underlying cellular mechanisms of the rapid antidepressant actions of ketamine remain largely unclear. Both male and female Sprague-Dawley rats were used and received modified learned helplessness paradigm to induce depression-like behavior. Depression-like behavior was assayed and manipulated using forced swim tests, sucrose preference tests and pharmacological microinjection. We conducted whole-cell patch-clamp electrophysiological recordings in the midbrain ventrolateral periaqueductal gray (vlPAG) neurons. Surface and cytosolic glutamate receptor 1 (GluR1) α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor expression were analyzed using Western blotting. Phosphorylated GluR1 expression was quantified using Western blotting analysis. The results showed that a single systemic administration of a ketamine metabolite (2R,6R)-hydroxynorketamine (2R,6R-HNK) rapidly rescued chronic stress-induced depression-like behavior and persisted for up to 21 days. Consistently, the chronic stress-induced diminished glutamatergic transmission and surface GluR1 expression in the vlPAG were also reversed by a single systemic injection of (2R,6R)-HNK. Furthermore, bath application of (2R,6R)-HNK increased the frequency and amplitude of miniature excitatory postsynaptic currents (mEPSCs) in the vlPAG. Further evidence for the antidepressant action of (2R,6R)-HNK is provided by the finding that microinjection of (2R,6R)-HNK into the vlPAG exhibited a rapid-acting and long-lasting antidepressant effect. This antidepressant effect of (2R,6R)-HNK was prevented by the intra-vlPAG microinjection of AMPA receptor antagonist CNQX. Together, the current results provide evidence that (2R,6R)-HNK rescues chronic stress-induced depression-like behavior with rapid-acting and long-lasting antidepressant effects through enhancement of AMPA receptor-mediated transmission in the vlPAG.

LanguageEnglish
Pages1-12
Number of pages12
JournalNeuropharmacology
Volume139
DOIs
Publication statusPublished - Sep 1 2018

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Periaqueductal Gray
Mesencephalon
Antidepressive Agents
Depression
AMPA Receptors
Glutamate Receptors
Ketamine
Microinjections
Western Blotting
Learned Helplessness
6-Cyano-7-nitroquinoxaline-2,3-dione
alpha-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic Acid
Excitatory Postsynaptic Potentials
Baths
Sprague Dawley Rats
Sucrose
Pharmacology
Neurons
Injections

Keywords

  • AMPA receptor
  • Chronic stress
  • Depression
  • Electrophysiology
  • Periaqueductal gray

ASJC Scopus subject areas

  • Pharmacology
  • Cellular and Molecular Neuroscience

Cite this

(2R,6R)-hydroxynorketamine rescues chronic stress-induced depression-like behavior through its actions in the midbrain periaqueductal gray. / Chou, Dylan; Peng, Hsien Yu; Lin, Tzer Bin; Lai, Cheng Yuan; Hsieh, Ming Chun; Wen, Yang Cheng; Lee, An Sheng; Wang, Hsueh Hsiao; Yang, Po Sheng; Chen, Gin Den; Ho, Yu Cheng.

In: Neuropharmacology, Vol. 139, 01.09.2018, p. 1-12.

Research output: Contribution to journalArticle

Chou, Dylan ; Peng, Hsien Yu ; Lin, Tzer Bin ; Lai, Cheng Yuan ; Hsieh, Ming Chun ; Wen, Yang Cheng ; Lee, An Sheng ; Wang, Hsueh Hsiao ; Yang, Po Sheng ; Chen, Gin Den ; Ho, Yu Cheng. / (2R,6R)-hydroxynorketamine rescues chronic stress-induced depression-like behavior through its actions in the midbrain periaqueductal gray. In: Neuropharmacology. 2018 ; Vol. 139. pp. 1-12.
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abstract = "It has been widely reported that ketamine rescues chronic stress-induced depression-like behavior, but the underlying cellular mechanisms of the rapid antidepressant actions of ketamine remain largely unclear. Both male and female Sprague-Dawley rats were used and received modified learned helplessness paradigm to induce depression-like behavior. Depression-like behavior was assayed and manipulated using forced swim tests, sucrose preference tests and pharmacological microinjection. We conducted whole-cell patch-clamp electrophysiological recordings in the midbrain ventrolateral periaqueductal gray (vlPAG) neurons. Surface and cytosolic glutamate receptor 1 (GluR1) α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor expression were analyzed using Western blotting. Phosphorylated GluR1 expression was quantified using Western blotting analysis. The results showed that a single systemic administration of a ketamine metabolite (2R,6R)-hydroxynorketamine (2R,6R-HNK) rapidly rescued chronic stress-induced depression-like behavior and persisted for up to 21 days. Consistently, the chronic stress-induced diminished glutamatergic transmission and surface GluR1 expression in the vlPAG were also reversed by a single systemic injection of (2R,6R)-HNK. Furthermore, bath application of (2R,6R)-HNK increased the frequency and amplitude of miniature excitatory postsynaptic currents (mEPSCs) in the vlPAG. Further evidence for the antidepressant action of (2R,6R)-HNK is provided by the finding that microinjection of (2R,6R)-HNK into the vlPAG exhibited a rapid-acting and long-lasting antidepressant effect. This antidepressant effect of (2R,6R)-HNK was prevented by the intra-vlPAG microinjection of AMPA receptor antagonist CNQX. Together, the current results provide evidence that (2R,6R)-HNK rescues chronic stress-induced depression-like behavior with rapid-acting and long-lasting antidepressant effects through enhancement of AMPA receptor-mediated transmission in the vlPAG.",
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AU - Lai, Cheng Yuan

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AU - Wen, Yang Cheng

AU - Lee, An Sheng

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AU - Chen, Gin Den

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