1. Tramadol induces changes in Δ-FosB, µ-opioid receptor, and p-CREB level in the nucleus accumbens and prefrontal cortex of male Wistar rat
   Mitra-Sadat Sadat-Shirazi et al, 2019, The American Journal of Drug and Alcohol Abuse CrossRef
2. Chronic morphine regulates TRPM8 channels via MOR-PKCβ signaling
   Mircea Iftinca et al, 2020, Molecular Brain CrossRef
3. Spinal CX3CL1/CX3CR1 May Not Directly Participate in the Development of Morphine Tolerance in Rats
   Yawen Peng et al, 2017, Neurochemical Research CrossRef