Summary

Forced Swim-Test als ein Modell der Depressive ähnliche Verhalten

Published: March 02, 2015
doi:

Summary

This protocol describes the forced swim test, which is used for the study of depressive-like behavior in rodents. This procedure involves placing an animal in a container filled with water that eventually will lead to the exhibition of immobility behavior, which is considered to reflect behavioral despair.

Abstract

The goal of the present protocol is to describe the forced swim test (FST), which is one of the most commonly used assays for the study of depressive-like behavior in rodents. The FST is based on the assumption that when placing an animal in a container filled with water, it will first make efforts to escape but eventually will exhibit immobility that may be considered to reflect a measure of behavioral despair. This test has been extensively used because it involves the exposure of the animals to stress, which was shown to have a role in the tendency for major depression. Additionally, the FST has been shown to share some of the factors that are influenced or altered by depression in humans, including changes in food consumption, sleep abnormalities and drug-withdrawal-induced anhedonia. The main advantages of this procedure are that it is relatively easy to perform and that its results are easily and quickly analyzed. Moreover, its sensitivity to a broad range of antidepressant drugs that makes it a suitable screening test is one of the most important features leading to its high predictive validity. Despite its appeal, this model has a number of disadvantages. First, the issue of chronic augmentation is problematic in this test because in real life patients need to be treated for at least several weeks before they experience any relief from their symptoms. Last, due to the aversiveness of the FST, it is important to take into account possible influences it might have on brain structure/function if brain analyses are to be carried out following this procedure.

Introduction

Depression ist eine lebensbedrohliche psychiatrische Störung und eine große öffentliche Gesundheit betreffen weltweit mit einer Häufigkeit von 5% und einer Lebenszeitprävalenz von 15-20%. Darüber hinaus wird geschätzt, dass bis zum Jahr 2020 Depressionen in den ersten drei Beiträge zur Krankheitslast 1,2 sein. Depression ist mit Behinderung verbunden sind, verringert die Lebensqualität, erhöhte Gesundheitskosten und wird für viele Krankheiten, einschließlich Herz-Kreislauf, Stoffwechsel und neuropsychiatrischen Störungen 3,4 .Current pharmazeutisch-therapeutische Behandlungen Wirksamkeit begrenzt und werden im Zusammenhang mit als Hauptrisikofaktor viele schädliche Nebenwirkungen 5,6. Daher bleibt ein besseres Verständnis der Pathophysiologie dieser Erkrankung neben der Entwicklung von innovativen und verbesserten Behandlung entscheidend. Daher sind Tiermodelle wesentlichen zum Vorschieben Forschung auf diesem Gebiet.

Es gibt viele Modelle für die Untersuchung dieser Erkrankung (verwendet <em> zB Saccharose Präferenztest, Schwanz Suspensionstest) mit dem Zwangsschwimmtest (FST, der auch als Porsolt-Test nach der Entwickler dieser Modell 7,8 bekannt), einer der am häufigsten verwendeten Tests 7,9-12.

Während der FST ein Tier in einem Behälter mit Wasser aus dem sie nicht entweichen können gefüllt war. Das Tier wird zuerst versuchen zu fliehen, aber schließlich wird Immobilität (dh schwimmend mit dem Fehlen einer Bewegung mit Ausnahme derjenigen, für die Führung der Nase über Wasser erforderlich) aufweisen. Die FST ist ein sehr beliebtes Modell in Tierversuchen für eine Reihe von Gründen. Zunächst geht es um die Exposition der Tiere auf Stress, von dem gezeigt wurde, eine Rolle in der Tendenz für die Hauptdepression 12-14 haben. Außerdem Depression wird oft als mangelnde Fähigkeit, mit Stress 15-17 behandeln angesehen. Zweitens pharmakologische Behandlung mit Antidepressiva vor der Prüfung hat sich gezeigt, Unbeweglichkeit in der FST <reduzierensup> 18-23. Daher wird häufig als Screening-Test an neuen Verbindungen mit potentiellen antidepressive Eigenschaften 15-17,24 verwendet. Zusätzlich kann die FST ist gezeigt worden, einige der Faktoren, beeinflußt werden oder durch Drücken in Menschen verändert, wie beispielsweise Veränderungen bei der Nahrungsaufnahme, Schlafanomalien und gemeinsam Drogenentzug-induzierte Anhedonie 15-17,24. Dies ist auch der Grund, warum dieser Test wird manchmal verwendet, um depressive Verhalten in mutierten Mäusen, mit Zunahme oder Abnahme der basalen Unbeweglichkeit zu bewerten (im Vergleich zur "Wildtyp" Mäuse) 25,26.

Protocol

HINWEIS: Alle Versuchsprotokolle wurden durch das Internationale Komitee für Animal Care und Verwenden in Israel zugelassen. Alle Anstrengungen wurden unternommen, um die Zahl der verwendeten Tiere und ihr Leiden zu minimieren. 1. Vorbereitung für die Zwangsschwimmtest Verwenden Sie zwei benachbarte Zimmer. Verwenden Sie ein Zimmer als "Warteraum" für den Verhaltenstests halten die Tiere vor, und die andere für die Durchführung des Verfahrens. Bereiten tra…

Representative Results

Die folgenden Ergebnisse werden auf unveröffentlichte Daten aus unserem Labor beruht. In diesem Experiment wurden erwachsene weibliche ICR-Mäuse nach 3 Wochen der Behandlung mit dem selektiven Serotonin-Wiederaufnahmehemmer (SSRI) Escitalopram oder neuartige pflanzliche antidepressiven und Anti-Angst-Behandlung (NHT) getestet (für zusätzliche Informationen über die pflanzliche Behandlung, siehe 12 , 27,28). Einweg-ANOVA ergab, dass die Behandlung reduziert depressive Verhalten in der FST [F (2,58) = 4,88…

Discussion

Die FST wird zur Behandlung depressiver artiges Verhalten zu überwachen und auf der Annahme, dass Immobilität reflektiert ein Maß behavioral despair 3 bezogen. Die wesentlichen Vorteile dieses Verfahrens liegen in der relativ einfachen Betrieb und schnelle Ergebnisse. Darüber hinaus ist seine Empfindlichkeit gegenüber einem breiten Spektrum von Antidepressiva, die ihn zu einem geeigneten Screening-Test ist eine der wichtigsten Eigenschaften, die zu ihrer hohen prognostische Validität 29. Wich…

Disclosures

The authors have nothing to disclose.

Acknowledgements

This research was supported by the Israel Science Foundation (grant No. 738/11), by the National Institute for Psychobiology in Israel (NIPI-7-2011-12), and by the Open University Foundation

Materials

Name of Material/ Equipment Company Catalog Number Comments/Description
Computer Dell intel(r) core(tm) i3-2120 cpu @ 3.30ghz, 4GB ram
Camera VIDO AU-CB422 B/W CCD CAMERA 
http://www.vido-europe.com/products_detail.asp?id=33&pcategory=2
Coding software Biobserve FST Analysis
http://www.biobserve.com/products/fst/index.html
Heating lamp Ikea AA-19025-3 ESPRESSIVIO 400.504.46 - 20W G4 Bulb 
http://www.ikea.com/ms/en_US/customer_service/assembly/E/E00050467.pdf
Heating pillow Sachs EF-188B 38*38cm Heating pillow
http://www.sachs.co.il/eng/lego_tree.php?instance_id=21&actions=show&id=
604

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Cite This Article
Yankelevitch-Yahav, R., Franko, M., Huly, A., Doron, R. The Forced Swim Test as a Model of Depressive-like Behavior. J. Vis. Exp. (97), e52587, doi:10.3791/52587 (2015).

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