research Delta Opioid Receptors Presynaptically Regulate Cutaneous Mechanosensory Neuron Input to the Spinal Cord Dorsal Horn 140 citations , February 2014 in “Neuron” Delta opioid receptors help regulate touch sensation by reducing neurotransmitter release in the spinal cord.
research Peptide-Based Approaches for Pain Relief and Healing in Wounds January 2026 in “International Journal of Molecular Sciences” Topical peptides may offer safer, effective pain relief and healing for wounds.