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Objective To explore the functional responses of normal rat pulmonary artery smooth muscle cells(PASMCs)from different orders of pulmonary artery to the platelet-derived growth factor(PDGF).Methods The pulmonary artery branches were gently isolated from Sprague-Dawley rats(250-350 g)and eventually cut into three groups according to the vascular grading:the
Objective To explore the functional responses of normal rat pulmonary artery smooth muscle cells (PASMCs) from different orders of pulmonary artery to the platelet-derived growth factor (PDGF). Methods The pulmonary artery branches were gently isolated from Sprague-Dawley rats (250- 350 g) and eventually cut into three groups according to the vascular grading: the