Behavioral and genetic markers of fentanyl intake escalation
Author Information
Author(s): Keady Jack, Charnigo Richard, Shaykin Jakob D., Prantzalos Emily, Xia Mengfan, Denehy Emily, Bumgardner Cody, Miller Justin, Ortinski Pavel, Bardo Michael T., Turner Jill R.
Primary Institution: Cold Spring Harbor Laboratory
Hypothesis
Individual differences in responsivity to sucrose may predict escalation of fentanyl intake.
Conclusion
The study found that while sucrose breakpoints did not predict overall fentanyl acquisition, they did predict intake on the first day of extended access to fentanyl, and identified gene networks associated with escalated fentanyl intake.
Supporting Evidence
- Sucrose breakpoints did not predict fentanyl acquisition or change during escalation.
- Gene modules linked to escalated fentanyl intake were identified, including those coding for voltage-gated potassium channels.
- Transcription factors EZH2 and JARID2 were identified as potential regulators associated with escalated fentanyl intake.
Takeaway
The way rats respond to sugar might help us understand how they take more fentanyl over time, and some genes could be linked to this behavior.
Methodology
Male and female Sprague-Dawley rats were trained in a sucrose reinforcement task and underwent fentanyl self-administration sessions, followed by RNA sequencing and qPCR.
Limitations
The study did not find predictive associations between behavior and gene expression overall.
Participant Demographics
Male and female Sprague-Dawley rats.
Digital Object Identifier (DOI)
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