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Effects of nitric oxide (NO) synthesis inhibition on the development of supersensitivity to stereotypy and locomotion stimulating effects of methamphetamine

, : Effects of nitric oxide (NO) synthesis inhibition on the development of supersensitivity to stereotypy and locomotion stimulating effects of methamphetamine. Brain Research 679(2): 200-204

The present study examined the effects of nitric oxide (NO) synthase inhibitor, N omega-nitro-L-arginine methyl ester (LNAME; 30 and 60 mg/kg, i.p.) on the development of supersensitivity to stereotypy as well as locomotion stimulating effects of methamphetamine (MA) (3.22 and 0.805 mg free base/kg, s.c., respectively). Rats treated with MA for 10 days showed enhancement in MA-induced stereotypy and locomotor activity. Rats pretreated with LNAME prior to MA also showed enhancement in the two types of behavior, also they showed significantly reduced stereotypy scores compared to those treated with MA alone. The results suggest that NO synthesis is not critically involved in the development of behavioral supersensitivity to stereotypy stimulating as well as locomotion stimulating effect of MA. However, No synthesis may have a modulatory role in behavioral sensitization in stereotypy.


PMID: 7543354

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