alexa The long-acting vasoactive intestinal polypeptide agonist RO 25-1553 is highly selective of the VIP2 receptor subclass
Neurology

Neurology

Journal of Clinical & Experimental Neuroimmunology

Author(s): Gourlet P, Vertongen P, Vandermeers A, VandermeersPiret MC, Rathe J

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RO 25-1553 is a synthetic VIP analogue that induced a long-lasting relaxation of tracheal and bronchial smooth muscles as well as a reduction of edema and eosinophilic mobilization during pulmonary anaphylaxis. In the present study, we tested in vitro the capacity of RO 25-1553 to occupy the different VIP/PACAP receptor subclasses and to stimulate adenylate cyclase activity. The cellular models tested expressed one single receptor subtype: Chinese hamster ovary (CHO) cells transfected with the rat recombinant PACAP I, rat VIP1, and human VIP2 receptors; SUP T1 cells expressing the human VIP2 and HCT 15 and LoVo cells expressing the human VIP1 receptor. RO 25-1553 was threefold more potent than VIP on the human VIP2 receptor, 100- and 600-fold less potent than VIP on the rat and human VIP1 receptors, respectively, and 10-fold less potent than VIP and 3000-fold less potent than PACAP on the PACAP I receptor. RO 25-1553 was a full agonist on the VIP2, the PACAP I, and the rat recombinant VIP1 receptor but a partial agonist only on the human VIP1 receptor. Thus, RO 25-1553 is a highly selective agonist ligand for the VIP2 receptor subclass.

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This article was published in Peptides. and referenced in Journal of Clinical & Experimental Neuroimmunology

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