Dopamine Transporter Knockout Rats Display Epigenetic Alterations in Response to Cocaine Exposure
(1) Background: There is an urgent need for effective treatments for cocaine use disorder (CUD), and new pharmacological approaches targeting epigenetic mechanisms appear to be promising options for the treatment of this disease. Dopamine Transporter (DAT) transgenic rats recently have been proposed...
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MDPI AG
2023-07-01
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| Series: | Biomolecules |
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| Online Access: | https://www.mdpi.com/2218-273X/13/7/1107 |
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| author | Samara Vilca Claes Wahlestedt Sari Izenwasser Raul R. Gainetdinov Marta Pardo |
| author_facet | Samara Vilca Claes Wahlestedt Sari Izenwasser Raul R. Gainetdinov Marta Pardo |
| author_sort | Samara Vilca |
| collection | DOAJ |
| description | (1) Background: There is an urgent need for effective treatments for cocaine use disorder (CUD), and new pharmacological approaches targeting epigenetic mechanisms appear to be promising options for the treatment of this disease. Dopamine Transporter (DAT) transgenic rats recently have been proposed as a new animal model for studying susceptibility to CUD. (2) Methods: DAT transgenic rats were treated chronically with cocaine (10 mg/kg) for 8 days, and the expression of epigenetic modulators, Lysine Demethylase 6B (KDM6B) and Bromodomain-containing protein 4 (BRD4), was examined in the prefrontal cortex (PFC). (3) Results: We show that only full knockout (KO) of DAT impacts basal levels of KDM6B in females. Additionally, cocaine altered the expression of both epigenetic markers in a sex- and genotype-dependent manner. In response to chronic cocaine, KDM6B expression was decreased in male rats with partial DAT mutation (HET), while no changes were observed in wild-type (WT) or KO rats. Indeed, while HET male rats have reduced KDM6B and BRD4 expression, HET female rats showed increased KDM6B and BRD4 expression levels, highlighting the impact of sex on epigenetic mechanisms in response to cocaine. Finally, both male and female KO rats showed increased expression of BRD4, but only KO females exhibited significantly increased KDM6B expression in response to cocaine. Additionally, the magnitude of these effects was bigger in females when compared to males for both epigenetic enzymes. (4) Conclusions: This preliminary study provides additional support that targeting KDM6B and/or BRD4 may potentially be therapeutic in treating addiction-related behaviors in a sex-dependent manner. |
| first_indexed | 2024-03-11T01:15:11Z |
| format | Article |
| id | doaj.art-0879c0a838734485a65b931ced90ef58 |
| institution | Directory Open Access Journal |
| issn | 2218-273X |
| language | English |
| last_indexed | 2024-03-11T01:15:11Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Biomolecules |
| spelling | doaj.art-0879c0a838734485a65b931ced90ef582023-11-18T18:31:32ZengMDPI AGBiomolecules2218-273X2023-07-01137110710.3390/biom13071107Dopamine Transporter Knockout Rats Display Epigenetic Alterations in Response to Cocaine ExposureSamara Vilca0Claes Wahlestedt1Sari Izenwasser2Raul R. Gainetdinov3Marta Pardo4Department of Psychiatry and Behavioral Sciences, Miller School of Medicine, University of Miami, Miami, FL 33136, USADepartment of Psychiatry and Behavioral Sciences, Miller School of Medicine, University of Miami, Miami, FL 33136, USADepartment of Psychiatry and Behavioral Sciences, Miller School of Medicine, University of Miami, Miami, FL 33136, USAInstitute of Translational Biomedicine, St. Petersburg University Hospital, St. Petersburg State University, Universitetskaya Emb. 7-9, 199034 St. Petersburg, RussiaDepartment of Neurology, Miller School of Medicine, University of Miami, Miami, FL 33136, USA(1) Background: There is an urgent need for effective treatments for cocaine use disorder (CUD), and new pharmacological approaches targeting epigenetic mechanisms appear to be promising options for the treatment of this disease. Dopamine Transporter (DAT) transgenic rats recently have been proposed as a new animal model for studying susceptibility to CUD. (2) Methods: DAT transgenic rats were treated chronically with cocaine (10 mg/kg) for 8 days, and the expression of epigenetic modulators, Lysine Demethylase 6B (KDM6B) and Bromodomain-containing protein 4 (BRD4), was examined in the prefrontal cortex (PFC). (3) Results: We show that only full knockout (KO) of DAT impacts basal levels of KDM6B in females. Additionally, cocaine altered the expression of both epigenetic markers in a sex- and genotype-dependent manner. In response to chronic cocaine, KDM6B expression was decreased in male rats with partial DAT mutation (HET), while no changes were observed in wild-type (WT) or KO rats. Indeed, while HET male rats have reduced KDM6B and BRD4 expression, HET female rats showed increased KDM6B and BRD4 expression levels, highlighting the impact of sex on epigenetic mechanisms in response to cocaine. Finally, both male and female KO rats showed increased expression of BRD4, but only KO females exhibited significantly increased KDM6B expression in response to cocaine. Additionally, the magnitude of these effects was bigger in females when compared to males for both epigenetic enzymes. (4) Conclusions: This preliminary study provides additional support that targeting KDM6B and/or BRD4 may potentially be therapeutic in treating addiction-related behaviors in a sex-dependent manner.https://www.mdpi.com/2218-273X/13/7/1107cocaineDATknockoutepigeneticsKDM6BBRD4 |
| spellingShingle | Samara Vilca Claes Wahlestedt Sari Izenwasser Raul R. Gainetdinov Marta Pardo Dopamine Transporter Knockout Rats Display Epigenetic Alterations in Response to Cocaine Exposure Biomolecules cocaine DAT knockout epigenetics KDM6B BRD4 |
| title | Dopamine Transporter Knockout Rats Display Epigenetic Alterations in Response to Cocaine Exposure |
| title_full | Dopamine Transporter Knockout Rats Display Epigenetic Alterations in Response to Cocaine Exposure |
| title_fullStr | Dopamine Transporter Knockout Rats Display Epigenetic Alterations in Response to Cocaine Exposure |
| title_full_unstemmed | Dopamine Transporter Knockout Rats Display Epigenetic Alterations in Response to Cocaine Exposure |
| title_short | Dopamine Transporter Knockout Rats Display Epigenetic Alterations in Response to Cocaine Exposure |
| title_sort | dopamine transporter knockout rats display epigenetic alterations in response to cocaine exposure |
| topic | cocaine DAT knockout epigenetics KDM6B BRD4 |
| url | https://www.mdpi.com/2218-273X/13/7/1107 |
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