Okragly, A.J. and Haak-Frendscho, M.
Notes: The levels of GDNF, NGF, and NT-3 were quantitated in various mouse tissues, including spleen, muscle, heart, lung, liver, kidney, bladder, gastrointestinal tract, brain, and serum. Additional samples screened for NGF included pig, goat, horse, chicken, rabbit, sheep, and bovine serum and rat brain. Samples were untreated or acid treated by acidification to pH <3.0 followed by neutralization to pH 7.6. In all tissue samples and most serum samples, the detectable levels of GDNF, NGF and NT-3 increased up to 35-fold. It is thought that the acidification process promotes dissociation of receptors and associated proteins making the neurotrophins more accessible. Levels of GDNF, NGF, and NT-3 were determined using the GDNF, NGF, and NT-3 Emax ImmunoAssay Systems, respectively. Please note that the coat antibody in the NGF Emax ImmunoAssay System was changed 12/2002 and may affect cross-reactivity. (3105)