Secretoneurin Mouse Rat – Cell Penetrating Peptides – CPP

Secretoneurin (SN) is a sensory neuropeptide derived from secretogranin-II by cleavage. SN is conserved from sharks to mammals, work with models suggests it has diverse and important roles. Use of mouse models suggests SN binds to secretoneurin G protein coupled receptors (GPCRs). SN binding stimulates dopamine release from striatal neurons and monocyte migration. SN potently recruits eosinophils in the lungs. Interestingly, in models SN stimulates pituitary luteinizing hormone release. With an array of actions as diverse as that seen with other sensory neuropeptides, there are also numerous inflammatory conditions linked with SN. As mentioned earlier, SN recruits eosinophils in the lungs and thus is being studied for a role in asthma. Study of autoimmune encephalomyelitis suggests SN may be recruited to the inflammatory lesion on the central nervous system. Further evidence to an inflammatory role, SN levels are downregulated in rheumatoid joints, but the relevance has yet to be established. Significant changes are noted in certain forms of dementia and Alzheimer. Many aspects still require work, but SN has the potential to reveal underlying mechanisms of these inflammatory conditions and new therapies.