Despite neuroprotective potential in several neurological disorders such as Parkinson’s [40, 41], Alzheimer’s [42], and Huntington’s disease [43], as well as traumatic brain injury [44], clinical studies targeting PACAP signaling have been conducted addressing nociception upon nephrotic syndrome, cluster headache, migraine, and major depression [45, 46]. Here, ADCYAP1 is linked to Parkinson disease.