Pituitary Adenylate Cyclase Activating Peptide (1-38) and its analog (Acetyl-[Ala15, Ala20] PACAP 38-polyamide) reverse methacholine airway hyperresponsiveness in rats . Braz. J. Pharm. Sci. 2015;51(3):681-688. doi:10.1590/S1984-82502015000300020