Expression of CFTR in DRG cells. Acutely dissociated rat DRG cells were immunostained with antibodies against MAP2, GFAP, fibronectin (FN), or S100 together with an anti-CFTR antibody. DIC, differential interference contrast. Bars, 50 μm. Note that satellite cells around a neuron are detected with an anti-GFAP antibody (arrows) and that immunoreactive signals against an anti-CFTR antibody are found with DRG neurons only, but not satellite cells, fibroblast, or Schwann cell.