Back to Search
Start Over
Methamphetamine Induces TET1- and TET3-Dependent DNA Hydroxymethylation of Crh and Avp Genes in the Rat Nucleus Accumbens.
- Source :
-
Molecular neurobiology [Mol Neurobiol] 2018 Jun; Vol. 55 (6), pp. 5154-5166. Date of Electronic Publication: 2017 Aug 25. - Publication Year :
- 2018
-
Abstract
- Methamphetamine (METH) addiction is a biopsychosocial disorder that is accompanied by multiple relapses even after prolonged abstinence, suggesting the possibilities of long-lasting maladaptive epigenetic changes in the brain. Here, we show that METH administration produced time-dependent increases in the expression of corticotropin-releasing hormone (Crh/Crf), arginine vasopressin (Avp), and cocaine- and amphetamine-regulated transcript prepropeptide (Cartpt) mRNAs in the rat nucleus accumbens (NAc). Chromatin immunoprecipitation (ChIP) assays revealed that METH increased the abundance of phosphorylated CREB (pCREB) at the promoter of Cartpt but not at Avp or Crh DNA sequences. In contrast, METH produced DNA hypomethylation at sites near the Crh transcription start site (TSS) and at intragenic Avp sequences. METH also increased DNA hydroxymethylation at the Crh TSS and at intragenic Avp sites. In addition, METH increased the protein expression of ten-eleven-translocation enzymes that catalyze DNA hydroxymethylation. Importantly, METH increased TET1 binding at the Crh promoter and increased TET3 binding at Avp intragenic regions. We further tested the role of TET enzymes in METH-induced changes in gene expression by using the TET inhibitor, 1,5-isoquinolinediol (IQD), and found that IQD blocked METH-induced increases in Crh and Avp mRNA expression. Together, these results indicate that METH produced changes in neuropeptide transcription by both activation of the cAMP/CREB pathway and stimulation of TET-dependent DNA hydroxymethylation. These results provide molecular evidence for epigenetic controls of METH-induced changes in the expression of neuropeptides.
- Subjects :
- Animals
Arginine Vasopressin metabolism
Corticotropin-Releasing Hormone metabolism
Cyclic AMP Response Element-Binding Protein metabolism
DNA (Cytosine-5-)-Methyltransferase 1 metabolism
DNA Methylation drug effects
Gene Expression Regulation drug effects
Male
Models, Biological
Neuropeptides genetics
Neuropeptides metabolism
Nucleus Accumbens drug effects
Phosphorylation drug effects
Promoter Regions, Genetic genetics
Rats, Sprague-Dawley
Arginine Vasopressin genetics
Corticotropin-Releasing Hormone genetics
DNA Methylation genetics
Dioxygenases metabolism
Methamphetamine pharmacology
Nucleus Accumbens metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1559-1182
- Volume :
- 55
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- Molecular neurobiology
- Publication Type :
- Academic Journal
- Accession number :
- 28842817
- Full Text :
- https://doi.org/10.1007/s12035-017-0750-9