NGF and chronic cystitis: In contrast, CYP-induced cystitis in NGF-OE mice resulted in significant, additional changes in transcript expression for NGF, BDNF and receptors (TrkA, TrkB, p75NTR) and PACAP/VIP and receptors (PAC1, VPAC1, VPAC2) in lumbosacral DRG and urinary bladder (e.g., urothelium, detrusor) that was dependent on the duration of cystitis (Girard et al., 2012).