Time course and duration of changes in Kv7.2 and Kv11.1 mRNA expression in the hippocampus and piriform cortex following electroconvulsive stimulations

Marie-Louise Hjaeresen, Ida Hageman, Gitta Wörtwein, Martin B Jørgensen*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

2 Citations (Scopus)

Abstract

Background
A minimum of six electroconvulsive therapy (ECT) treatments has to be delivered to achieve sustained improvement in major depression. However, the mechanisms of the therapeutic actions of ECT are still debated.

Objective
We aimed to study the time course and duration of increased Kv7.2 and Kv11.1 mRNA expression in the hippocampus and piriform cortex (Pir) after electroconvulsive stimulation (ECS).

Methods
Adult male Sprague-Dawley rats received three ECS per week over 1, 2, or 3 weeks and were decapitated 3 days after the last stimulus. Additional groups of rats receiving nine ECS were sacrificed 7 or 28 days after the last ECS. In situ hybridization was used to measure Kv channel mRNA expression after ECS.

Results
Kv7.2 mRNA was increased in the hippocampus and Pir 3 days after both six and nine, but not after three ECS. This was also seen for Kv11.1 mRNA in Pir. These changes lasted for at least 7 days.

Conclusions
These results indicate that the changes in Kv7.2 and Kv11.1 channels may contribute to the therapeutic effect of ECT. However, further research needs to be undertaken in this area to extend these findings.
Original languageEnglish
JournalBrain Stimulation
Volume5
Issue number1
Pages (from-to)55-60
Number of pages6
ISSN1935-861X
DOIs
Publication statusPublished - 2012

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