Abstract：
:Administration of non-competitive N-methyl-D-aspartate (NMDA) receptor antagonists (e.g. phencyclidine, MK-801) has been shown to elicit behavioral abnormalities related to symptoms of schizophrenia, such as spontaneous locomotor activity and impaired sensorimotor gating, as represented by deficits of prepulse inhibition (PPI). We sought to determine whether transient blockade of NMDA receptors at the neonatal stage would produce dopamine supersensitivity around puberty, as manifested by these behavioral measures. For this purpose, we examined methamphetamine (MAP; 1.0mg/kg, i.p.)-induced locomotor activity and PPI in pre- (postnatal day; PD 36-38) or post- (PD 64-66) puberty in rats administered MK-801 (0.2mg/kg/day, s.c.) between PD 7 and PD 10. Neonatal MK-801 treatment augmented MAP-induced hyperlocomotion especially in the early adulthood, whereas spontaneous locomotor activity and rearing were not changed. MK-801 administration also disrupted PPI without affecting startle amplitudes around puberty. These findings suggest that transient exposure to MK-801 in the neonatal stage causes exaggerated dopamine transmission and cognitive deficits, particularly in the post-puberty stage.
journal_name
Brain Resjournal_title
Brain researchauthors
Uehara T,Sumiyoshi T,Seo T,Matsuoka T,Itoh H,Suzuki M,Kurachi Mdoi
10.1016/j.brainres.2010.07.013subject
Has Abstractpub_date
2010-09-17 00:00:00pages
223-30eissn
0006-8993issn
1872-6240pii
S0006-8993(10)01539-8journal_volume
1352pub_type
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