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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Mechanisms of VIP-induced neuroprotection against neonatal excitotoxicity.

Two VIP receptors, shared with a similar affinity by pituitary adenylate cyclase-activating polypeptide ( PACAP), have been cloned: VPAC1 and VPAC2. PHI binds to these receptors with a lower affinity. We previously showed that VIP protects against excitotoxic white matter damage in newborn mice. This article aimed to determine the receptor involved in VIP-induced neuroprotection. VIP effects were mimicked with a similar potency by VPAC2 agonists and PHI but not by VPAC1 agonists, PACAP 27 or PACAP 38. VIP neuroprotective effects were lost in mice lacking VPAC2 receptor. In situ hybridization confirmed the presence of VPAC2 mRNA. These data suggest that, in this model, VIP- induced neuroprotection is mediated by VPAC2 receptors. The pharmacology of this VPAC2 receptor seems unconventional as PACAP does not mimic VIP effects and PHI acts with a comparable potency.[1]

References

  1. Mechanisms of VIP-induced neuroprotection against neonatal excitotoxicity. Rangon, C.M., Dicou, E., Goursaud, S., Mounien, L., Jégou, S., Janet, T., Muller, J.M., Lelièvre, V., Gressens, P. Ann. N. Y. Acad. Sci. (2006) [Pubmed]
 
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