Fig. 6
Immunostaining for apoptotic markers, active caspase 3 (a) and BAX (b), was analyzed by laser scanning cytometry in frozen sections of pulmonary artery from control and PPHN animals, following chronic exposure to U46619 added daily for 72 h in the absence of serum. Results expressed as integral intensity/mm2 area (**p < 0.001 compared to control D3 in same treatment group; #p < 0.01 compared to PA from same animal group in media alone)