BDNF and congestive heart failure: Immunofluorescence data further showed a marked increase in the number of BDNF-positive neurons, especially in medium and large-sized DRG subpopulations (mainly mechanically sensitive NF200 positive neurons) from CHF rats compared to sham rats (8.8 ± 2.5% vs. 68.8 ± 8.1%, n = 5/each, p < 0.05).