Strain differences in the isolation-induced effects on prepulse inhibition of the acoustic startle response and on locomotor activity

Isabelle C. Weiss, Lucia Di Lorio, Joram Feldon, Annette M. Domeney

Research output: Contribution to journalArticlepeer-review

Abstract

The authors investigated the effects of isolation rearing on acoustic startle response, prepulse inhibition (PPI), its modification by apomorphine, and locomotor activity in 3 rat strains: Wistar (WS), Sprague-Dawley (SD), and Lister hooded (LH). SD and LH, but not WS, showed isolation-induced PPI deficits. In 2 consecutive PPI tests, only SD isolates showed significant PPI deficits. An isolation rearing effect in LH was significant only in the 1st PPI test. Apomorphine dose-dependently (0.0-0.5 mg/kg) disrupted PPI, but sensitivity to the drug differed, with WS and SD rats being more sensitive to lower doses (0.01-0.05 mg/kg) than LH rats (0.5 mg/kg). Isolates, irrespective of strain, did not differ from grouped rats in their response to the apomorphine challenge. Only WS and LH isolates demonstrated significantly increased locomotor activity. Strain differences in the different parameters measured did not predict isolation-induced effects on PPI.

Original languageEnglish
Pages (from-to)364-373
Number of pages10
JournalBehavioral Neuroscience
Volume114
Issue number2
DOIs
StatePublished - 2000
Externally publishedYes

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