PMID- 15998196 OWN - NLM STAT- MEDLINE DCOM- 20051011 LR - 20191210 IS - 0735-7044 (Print) IS - 0735-7044 (Linking) VI - 119 IP - 3 DP - 2005 Jun TI - Intracerebroventricular self-administration of commonly abused anabolic-androgenic steroids in male hamsters (Mesocricetus auratus): nandrolone, drostanolone, oxymetholone, and stanozolol. PG - 752-8 AB - Previous studies by the authors have shown voluntary intracerebroventricular (icv) testosterone self-administration in hamsters (Mesocricetus auratus). Here, the authors compared icv self-administration of 4 anabolic steroids (drostanolone, nandrolone, oxymetholone, and stanozolol) at 0.1, 1.0, and 2.0 microg/microl, each for 8 days. Males (n=8/group) showed the highest levels of operant behavior for injectable steroids (drostanolone, nandrolone) compared with orally active androgens (oxymetholone, stanozolol). For nandrolone, responses on the active and inactive nose-pokes averaged 22.3 +/- 4.6/4 hr and 10.7 +/- 2.0/4 hr, respectively. Responding for drostanolone was similar. Males self-administering oxymetholone or stanozolol did not prefer the active nose-poke. These data demonstrate that injectable androgens are more reinforcing than oral steroids. CI - (c) 2005 APA, all rights reserved. FAU - Ballard, Cortney L AU - Ballard CL AD - Department of Cell and Neurobiology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA. FAU - Wood, Ruth I AU - Wood RI LA - eng GR - DA-12843/DA/NIDA NIH HHS/United States PT - Comparative Study PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Behav Neurosci JT - Behavioral neuroscience JID - 8302411 RN - 0 (Androgens) RN - 0 (Androstanols) RN - 4R1VB9P8V3 (Stanozolol) RN - 6PG9VR430D (Nandrolone) RN - 7DR7H00HDT (dromostanolone) RN - L76T0ZCA8K (Oxymetholone) SB - IM MH - Analysis of Variance MH - Androgens/*administration & dosage MH - Androstanols/administration & dosage MH - Animals MH - Behavior, Animal/drug effects MH - Conditioning, Operant/*drug effects MH - Cricetinae MH - Dose-Response Relationship, Drug MH - Drug Administration Routes MH - Exploratory Behavior/drug effects MH - Injections, Intraventricular MH - Male MH - Nandrolone/administration & dosage MH - Oxymetholone/administration & dosage MH - *Reinforcement, Psychology MH - Self Administration/methods MH - Stanozolol/administration & dosage MH - Substance-Related Disorders/*physiopathology MH - Time Factors EDAT- 2005/07/07 09:00 MHDA- 2005/10/12 09:00 CRDT- 2005/07/07 09:00 PHST- 2005/07/07 09:00 [pubmed] PHST- 2005/10/12 09:00 [medline] PHST- 2005/07/07 09:00 [entrez] AID - 2005-06959-012 [pii] AID - 10.1037/0735-7044.119.3.752 [doi] PST - ppublish SO - Behav Neurosci. 2005 Jun;119(3):752-8. doi: 10.1037/0735-7044.119.3.752.