Inbred strain differences in prepulse inhibition of the mouse startle response |
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Authors: | R Paylor Jacqueline N Crawley |
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Institution: | (1) Section on Behavioral Neuropharmacology, Experimental Therapeutics Branch, National Institute of Mental Health, Building 10, Room 4N212, Bethesda, MD 20892-1375, USA Fax (+1) 301 480-1164, e-mail: rpaylor@codon.nih.gov, US |
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Abstract: | Prepulse inhibition is the phenomenon in which a weak prepulse stimulus suppresses the response to a startling stimulus.
Patients with schizophrenia have impaired prepulse inhibition which is thought to reflect dysfunctional sensorimotor gating
mechanisms. To investigate the potential genetic basis for differences in sensorimotor gating, the responses of 13 inbred
strains of mice were evaluated using the prepulse inhibition paradigm. Ten male mice from A/J, AKR/J, BALB/cByJ, BUB/BnJ,
C3H/HeJ, C57BL/6J, C57BL/10J, DBA/2J, FVB/NJ, ST/bJ, 129/J, 129/SvJ, 129/SvEvTac inbred strains were tested for acoustic prepulse
inhibition of acoustic and tactile startle responses. There was a wide range of responses among the inbred strains of mice.
Exact strain distributions were determined for each combination of prepulse sound level and startle stimulus. In general,
mice from the 129/SvEvTac, AKR/J, 129/J, and 129/SvJ strains displayed high levels of prepulse inhibition of both the acoustic
and tactile startle responses. C57BL/6J, C57BL/10J and BUB/BnJ mice showed low levels of prepulse inhibition. There was also
a wide range in the amplitude of the acoustic and tactile startle responses. C57BL/10J and FVB/NJ mice displayed the greatest
startle responses and DBA/2J, 129/J and 129/SvJ had the poorest startle responses. There was no correlation between the level
of prepulse inhibition and the amplitude of the startle response. These findings indicate that inbred strains of mice may
be a useful tool to study the genetic basis of sensorimotor gating.
Received:8 October 1996 / Final version: 10 December 1996 |
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Keywords: | Inbred mice Sensorimotor gating Prepulse inhibition Acoustic startle Tactile startle |
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