Table 1.

Cell death and proliferation in sympathetic explants

Treatment	BrdUrd	TUNEL
NGF → NGF	24.2  ± 11.3 (n = 30)	9.0  ±  7.9 (n = 56)
NGF → NT3	30.5  ± 10.6 (n = 42)	15.8  ±  6.8 (n = 56)
NT3 → NT3	26.3  ±  7.2 (n = 36)	30.4  ± 16.8 (n = 19)
NT3 → NGF	26.6  ±  5.6 (n = 51)	22.5  ± 15.4 (n = 36)

E12 ganglia were cultured for 4 days in the presence of NGF or NT3 (10 ng/ml). Subsequently the same factor was added again or was replaced by the other. Twenty-four hours later explants were fixed and the number of TUNEL-positive or BrdUrd-positive nuclei per ganglion was determined.