Neurochemical basis of interleukin 2-modified discrimination behaviour.


Journal Article

We trained one group of rats to discriminate 0.8 mg/kg intraperitoneal (i.p.) d-amphetamine from 1 ml/kg saline and the other to discriminate 0.3 mg/kg i.p. (+/-)-ethylketocyclazocine (EKC) from saline. Recombinant human interleukin 2 (rIL-2), 2 x 10(6) U/kg (or 8.2 nmol/kg) given i.p. 1 h prior to tests, potentiated responses elicited by 0.4 mg/kg d-amphetamine. This potentiation of d-amphetamine responses was suppressed by the opioid receptor antagonist naloxone (1 mg/kg) when administered i.p. together with IL-2. IL-2 (4 x 10(6) U/kg) alone produced EKC-like responses in the EKC-trained animals. The cytokine also potentiated 0.1 mg/kg EKC responses at 2 x 10(6) U/kg, an action that was suppressed by 1 mg/kg naloxone. Data from the present study show that IL-2 exerts the same neurochemical action as that previously observed with IFN-alpha for both d-amphetamine and EKC discrimination in rats.

Full Text

Cited Authors

  • Ho, BT; Lu, JG; Huo, YY; Fan, SH; Meyers, CA; Tansey, LW; Payne, R; Levin, VA

Published Date

  • July 1994

Published In

Volume / Issue

  • 6 / 4

Start / End Page

  • 365 - 367

PubMed ID

  • 7948743

Pubmed Central ID

  • 7948743

International Standard Serial Number (ISSN)

  • 1043-4666

Digital Object Identifier (DOI)

  • 10.1016/1043-4666(94)90059-0


  • eng

Conference Location

  • England