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5-Aza-2’-deoxycytidine in the medial prefrontal cortex regulates alcohol-related behavior and Ntf3-TrkC expression in rats

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  • Xiaomeng Qiao
  • Fangyuan Yin
  • Yuanyuan Ji
  • Yunxiao Li
  • Peng Yan
  • Jianghua Lai

Abstract

Recent studies have indicated that DNA methylation plays an important role in the development of alcohol abuse. 5-Aza-2’-deoxycytidine (5-Aza-dc), an inhibitor of DNA methyltransferases, was FDA approved for myelodysplastic syndrome treatment. However, it is unclear whether 5-Aza-dc is involved in alcohol abuse. In this study, using a chronic alcohol exposure model in rats, 5-Aza-dc was injected into the medial prefrontal cortex (mPFC). Alcohol-drinking behavior and the anxiety related behavior were evaluated by two-bottle choice and open field test. We found that 5-Aza-dc injection into the mPFC significantly decreased alcohol consumption and alcohol preference in alcohol-exposure rats, corresponding to the reduced blood alcohol levels. Although 5-Aza-dc potentiated the anxiety-like behavior of alcohol-exposure rats, it had no effect on the locomotor activity. Moreover, both of the mRNA and protein levels of DNA Methyltransferase 3A (DNMT3A) and DNMT3B in the mPFC were upregulated after 35 days of alcohol exposure and this upregulation could be reversed by 5-Aza-dc treatment. Additionally, 5-Aza-dc reversed the alcohol-induced downregulation of neurotrophin-3 (Ntf3), correspondingly the expression of its receptor-TrkC was reduced. These findings identified a functional role of 5-Aza-dc in alcohol-related behavioral phenotypes and one of the potential target genes, Ntf3. We also provide novel evidence for DNA methyltransferases as potential therapeutic targets in alcohol abuse.

Suggested Citation

  • Xiaomeng Qiao & Fangyuan Yin & Yuanyuan Ji & Yunxiao Li & Peng Yan & Jianghua Lai, 2017. "5-Aza-2’-deoxycytidine in the medial prefrontal cortex regulates alcohol-related behavior and Ntf3-TrkC expression in rats," PLOS ONE, Public Library of Science, vol. 12(6), pages 1-17, June.
    • Handle: RePEc:plo:pone00:0179469
    DOI: 10.1371/journal.pone.0179469
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    1. Sebastian Alvarado & Rajendhran Rajakumar & Ehab Abouheif & Moshe Szyf, 2015. "Epigenetic variation in the Egfr gene generates quantitative variation in a complex trait in ants," Nature Communications, Nature, vol. 6(1), pages 1-9, May.
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