Figure 4From: Up-regulation of brain-derived neurotrophic factor in primary afferent pathway regulates colon-to-bladder cross-sensitization in rat BDNF expression in TRPV1 neurons in L1 DRG. Virtually all BDNF immunoreactivity (A, red cells) was expressed in TRPV1 neurons (B, green cells) in the DRG during colonic inflammation. However, a subpopulation of TRPV1 positive neurons (C, green cells, red arrows) did not express BDNF. Bar = 60 μm.Back to article page