Seasonal photoperiod cycling reduces inter-individual variability in mu-opioid receptor density in rats
Lihua Sun, Heidi Liljenbäck, Jenni Virta, Johan Rajander, Semi Helin, Emrah Yatkin, Jing Tang, Anne Roivainen
This study shows that seasonal photoperiod cycling reduces inter-individual variability in mu-opioid receptor density in rats compared to constant photoperiod conditions.
bioRxiv · Aug 5, 2026 · PreprintNeuroscience