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Dose Response. 2011;9(2):165-81. doi: 10.2203/dose-response.10-011.Cadet. Epub 2010 Jul 02.

Methamphetamine preconditioning causes differential changes in striatal transcriptional responses to large doses of the drug.

Dose-response : a publication of International Hormesis Society

Jean Lud Cadet, Christie Brannock, Bruce Ladenheim, Michael T McCoy, Genevieve Beauvais, Amber B Hodges, Elin Lehrmann, William H Wood, Kevin G Becker, Irina N Krasnova

Affiliations

  1. Molecular Neuropsychiatry Research Branch, Intramural Research Program, NIDA/NIH/DHHS, Baltimore, MD, USA.

PMID: 21731535 PMCID: PMC3118766 DOI: 10.2203/dose-response.10-011.Cadet

Abstract

Methamphetamine (METH) is a toxic drug of abuse, which can cause significant decreases in the levels of monoamines in various brain regions. However, animals treated with progressively increasing doses of METH over several weeks are protected against the toxic effects of the drug. In the present study, we tested the possibility that this pattern of METH injections might be associated with transcriptional changes in the rat striatum, an area of the brain which is known to be very sensitive to METH toxicity and which is protected by METH preconditioning. We found that the presence and absence of preconditioning followed by injection of large doses of METH caused differential expression in different sets of striatal genes. Quantitative PCR confirmed METH-induced changes in some genes of interest. These include small heat shock 27 kD proteins 1 and 2 (HspB1 and HspB2), brain derived neurotrophic factor (BDNF), and heme oxygenase-1 (Hmox-1). Our observations are consistent with previous studies which have reported that ischemic or pharmacological preconditioning can cause reprogramming of gene expression after lethal ischemic insults. These studies add to the growing literature on the effects of preconditioning on the brain transcriptome.

Keywords: BDNF; heat shock proteins; methamphetamine; preconditioning; striatum

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