TY - JOUR
T1 - Neuronal development genes are key elements mediating the reinforcing effects of methamphetamine, amphetamine, and methylphenidate
AU - Dela Peña, Ike
AU - Jeon, Se Jin
AU - Lee, Eunyoung
AU - Ryu, Jong Hoon
AU - Shin, Chan Young
AU - Noh, Minsoo
AU - Cheong, Jae Hoon
N1 - Funding Information:
Acknowledgments This work was supported by the Korean Food and Drug Administration (grant number 11182 Ui An Yu 602) and the Korea Healthcare Technology Research and Development Project, Ministry for Health and Welfare Affairs, Republic of Korea (grant number A120013).
PY - 2013/12
Y1 - 2013/12
N2 - Rationale: The molecular mechanisms underlying susceptibility to psychostimulant addiction remain unclear. Searching for commonalities in the effects of addictive drugs on brain gene expression is a prolific approach to determine transcriptional signatures influencing drug abuse. Objective: We explored the common transcriptional responses to the reinforcing effects of psychostimulants methamphetamine, amphetamine, and methylphenidate. We also aimed to identify transcriptional changes that may subserve abuse of these drugs. Methods: Genome-wide transcriptome profiling analyses were performed to identify common prefrontal cortical (PFC) and striatal gene expression profiles in drug-naïve (cohort 1) and stimulant-pretreated (cohort 2) rats, which showed a conditioned place preference to and self-administration of methamphetamine, amphetamine, and methylphenidate. Results: In behavioral studies, stimulant-pretreated rats showed behavioral sensitization characterized by enhanced behavioral response to the rewarding or reinforcing effects of psychostimulants. Inflammation-associated genes (e.g., Alas1, S100a8 and S100a9) were identified as the primary differentially expressed genes (DEGs) in both the PFC and the striatum of cohort 1 rats, while neuronal plasticity (Sgk1)- and brain development (e.g., Bhlhe22, Neurod1, Nr4a2, and Msx1)-associated genes comprised the major upregulated DEGs in the striatum of cohort 2 rats. Furthermore, a meta-analysis of the common striatal DEGs in this study along with morphine-regulated striatal transcriptomes in mice (National Center for Biotechnology Information-Gene Expression Omnibus Database Accession Code GSE7762) suggested similar expression profiles of genes involved in neuronal development (e.g., Bhlhe22, Nr4a2). Conclusion: This study provides evidence that brain development-associated genes mediate the reinforcing effects of methamphetamine, amphetamine, and methylphenidate and that these transcripts may underlie susceptibility to psychostimulant addiction.
AB - Rationale: The molecular mechanisms underlying susceptibility to psychostimulant addiction remain unclear. Searching for commonalities in the effects of addictive drugs on brain gene expression is a prolific approach to determine transcriptional signatures influencing drug abuse. Objective: We explored the common transcriptional responses to the reinforcing effects of psychostimulants methamphetamine, amphetamine, and methylphenidate. We also aimed to identify transcriptional changes that may subserve abuse of these drugs. Methods: Genome-wide transcriptome profiling analyses were performed to identify common prefrontal cortical (PFC) and striatal gene expression profiles in drug-naïve (cohort 1) and stimulant-pretreated (cohort 2) rats, which showed a conditioned place preference to and self-administration of methamphetamine, amphetamine, and methylphenidate. Results: In behavioral studies, stimulant-pretreated rats showed behavioral sensitization characterized by enhanced behavioral response to the rewarding or reinforcing effects of psychostimulants. Inflammation-associated genes (e.g., Alas1, S100a8 and S100a9) were identified as the primary differentially expressed genes (DEGs) in both the PFC and the striatum of cohort 1 rats, while neuronal plasticity (Sgk1)- and brain development (e.g., Bhlhe22, Neurod1, Nr4a2, and Msx1)-associated genes comprised the major upregulated DEGs in the striatum of cohort 2 rats. Furthermore, a meta-analysis of the common striatal DEGs in this study along with morphine-regulated striatal transcriptomes in mice (National Center for Biotechnology Information-Gene Expression Omnibus Database Accession Code GSE7762) suggested similar expression profiles of genes involved in neuronal development (e.g., Bhlhe22, Nr4a2). Conclusion: This study provides evidence that brain development-associated genes mediate the reinforcing effects of methamphetamine, amphetamine, and methylphenidate and that these transcripts may underlie susceptibility to psychostimulant addiction.
KW - Gene expression
KW - Neuronal development genes
KW - Psychostimulants
UR - https://www.scopus.com/pages/publications/84888646344
UR - https://www.scopus.com/pages/publications/84888646344#tab=citedBy
U2 - 10.1007/s00213-013-3168-8
DO - 10.1007/s00213-013-3168-8
M3 - Article
C2 - 23783774
SN - 0033-3158
VL - 230
SP - 399
EP - 413
JO - Psychopharmacology
JF - Psychopharmacology
IS - 3
ER -