A, expression of Nav channel subunit protein in NG from sham and CHF rats, measured by western blot. Data are mean ± SE, n=6 rats in each group. *P<0.05 vs. sham rats. B–D, colocalization of Nav channel subunits (Nav1.7, Nav1.8, and Nav1.9) and RT 97 or IB4 in NG from sham and CHF rats. RT97, A-type neuron marker; IB4, C-type neuron marker.