Table 3.

Hyperoxia exposure decreases the total volume of PDGFR-α positive cells at the alveolar tips

Treatment	Room Air	Hyperoxia
Lung volume, ml	0.25 ± 0.02	0.48 ± 0.03*
Alveolar tips Vv	0.040 ± 0.0065	0.015 ± 0.0024†
Alveolar tips volume per lung, ml	0.010 ± 0.0022	0.007 ± 0.0014
PDGFR-α(+) alveolar tips Vv	0.033 ± 0.0055	0.003 ± 0.0003*
PDGFR-α(+) alveolar tips volume per lung, ml	0.009 ± 0.0019	0.001 ± 0.0001†
PDGFR-α(+) alveolar tips volume/alveolar tips volume per lung, ml	0.819 ± 0.0390	0.238 ± 0.0672*

Vv, volume density. Values are means ± SE; n = 5 for Room Air and n = 6 for Hyperoxia condition; different from Room Air group,

^*P < 0.001,

^†P < 0.01, unpaired t-test.