The effects of dentate granule cell destruction on behavioral activity and Fos protein expression induced by systemic MDMA in rats
by
Won M, Minabe Y, Tani K, Suzuki K,
Kawai M, Sekine Y, Ashby CR, Takei N, Mori N.
Department of Psychiatry and Neurology,
Hamamatsu University School of Medicine,
Hamamatsu, 431-3192, Shizuoka, Japan
Neurosci Res. 2003 Jun;46(2):153-60


ABSTRACT

In this study, we examined the effect of the s.c. administration of (+/-) 3,4-methylenedioxymethamphetamine (MDMA) or saline on locomotor activity and Fos expression following the bilateral destruction of hippocampal dentate granule cells by colchicine in rats. The lesioned animals, when administered s.c. saline, showed a significantly greater increase in locomotor activity compared to the intact animals, and revealed a marginally significant level of increased locomotor activity compared to the sham-lesioned animals. In addition, when the lesioned animals were given s.c. saline or MDMA, there was a significant increase in Fos expression in the nucleus accumbens core, but not in the medial prefrontal cortex, dorsolateral prefrontal cortex, anterior cingulate cortex, piriform cortex, dorsal striatum, or nucleus accumbens shell, compared to the intact and sham-lesioned animals. Overall, these results suggest that the nucleus accumbens core may be involved in the enhancement of locomotor activity induced by the injection of saline alone (stress loading) or MDMA following bilateral destruction of hippocampal dentate granule cells by colchicine.

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