Figure 4. Effect of GH on apoptosis.

(A) 100X images of TUNEL and DAPI labeling in the saccule of a buffer-injected zebrafish. (B) Mean (±S.E.) number of TUNEL-labeled cells in the saccules, lagenae, and utricles of baseline and buffer- or GH-injected zebrafish. N = 6; * P<0.01, ** P<0.001. (C) TUNEL-labeling in the saccules of baseline, buffer- or GH-injected zebrafish at post-sound exposure day 1 (psed1). Scale bar  = 100 µm. Rostral-caudal orientation is the same as Fig. 1A.