TFF2 and asthma: Wei Gao et al. discovered that the expression of SP, NKA, and NKB diminished, whereas the level of vasoactive intestinal peptide (VIP) increased in the lung tissue of rats with an asthma model after acupuncture at BL11, BL12, and BL13, indicating that it may relax smooth muscle and suppress inflammation through the up-regulation of the cAMP signaling axis.