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Addiction and reward-related genes show altered expression in the postpartum nucleus accumbens

Overview of attention for article published in Frontiers in Behavioral Neuroscience, November 2014
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Title
Addiction and reward-related genes show altered expression in the postpartum nucleus accumbens
Published in
Frontiers in Behavioral Neuroscience, November 2014
DOI 10.3389/fnbeh.2014.00388
Pubmed ID
Authors

Changjiu Zhao, Brian Earl Eisinger, Terri M. Driessen, Stephen C. Gammie

Abstract

Motherhood involves a switch in natural rewards, whereby offspring become highly rewarding. Nucleus accumbens (NAC) is a key CNS region for natural rewards and addictions, but to date no study has evaluated on a large scale the events in NAC that underlie the maternal change in natural rewards. In this study we utilized microarray and bioinformatics approaches to evaluate postpartum NAC gene expression changes in mice. Modular Single-set Enrichment Test (MSET) indicated that postpartum (relative to virgin) NAC gene expression profile was significantly enriched for genes related to addiction and reward in five of five independently curated databases (e.g., Malacards, Phenopedia). Over 100 addiction/reward related genes were identified and these included: Per1, Per2, Arc, Homer2, Creb1, Grm3, Fosb, Gabrb3, Adra2a, Ntrk2, Cry1, Penk, Cartpt, Adcy1, Npy1r, Htr1a, Drd1a, Gria1, and Pdyn. ToppCluster analysis found maternal NAC expression profile to be significantly enriched for genes related to the drug action of nicotine, ketamine, and dronabinol. Pathway analysis indicated postpartum NAC as enriched for RNA processing, CNS development/differentiation, and transcriptional regulation. Weighted Gene Coexpression Network Analysis (WGCNA) identified possible networks for transcription factors, including Nr1d1, Per2, Fosb, Egr1, and Nr4a1. The postpartum state involves increased risk for mental health disorders and MSET analysis indicated postpartum NAC to be enriched for genes related to depression, bipolar disorder (BPD), and schizophrenia. Mental health related genes included: Fabp7, Grm3, Penk, and Nr1d1. We confirmed via quantitative PCR Nr1d1, Per2, Grm3, Penk, Drd1a, and Pdyn. This study indicates for the first time that postpartum NAC involves large scale gene expression alterations linked to addiction and reward. Because the postpartum state also involves decreased response to drugs, the findings could provide insights into how to mitigate addictions.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 132 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 132 100%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 20 15%
Researcher 20 15%
Student > Doctoral Student 17 13%
Student > Master 10 8%
Student > Bachelor 10 8%
Other 19 14%
Unknown 36 27%
Readers by discipline Count As %
Psychology 25 19%
Biochemistry, Genetics and Molecular Biology 14 11%
Medicine and Dentistry 14 11%
Neuroscience 13 10%
Agricultural and Biological Sciences 6 5%
Other 13 10%
Unknown 47 36%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 22 November 2014.
All research outputs
#20,243,777
of 22,771,140 outputs
Outputs from Frontiers in Behavioral Neuroscience
#2,823
of 3,161 outputs
Outputs of similar age
#219,142
of 262,689 outputs
Outputs of similar age from Frontiers in Behavioral Neuroscience
#74
of 86 outputs
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