低氧性新生儿持续肺动脉高压与肺血管重建发生机制

新生儿持续肺动脉高压(PPHN)为新生儿期的严重疾病,出生后肺动脉压力等于或超过体循环压力,出现动脉导管和(或)卵圆孔水平的右向左分流,导致明显的低氧血症.肺血管重建与PPHN的形成和发展过程有较强相关性,低氧引起的肺血管重建以血管壁的内膜、中膜和外膜细胞组成成分和调节机制紊乱,血管壁增厚为基本特征.该文从内皮细胞、平滑肌细胞和细胞外基质三方面来阐述低氧性PPHN与肺血管重建的关系及其可能机制.

The mechanism of hypoxia-induced persistent pulmonary hypertension of newborn and pulmonary vascular remodeling

Persistent pulmonary hypertension of newborn (PPHN) is a clinical syndrome,characterized by pulmonary arterial pressure elevated relative to systemic blood pressure,leading to extrapulmonary right-to-left shunting of blood across the ductus arteriosus and foramen ovale,causing severe hypoxemia.Pulmonary vascular remodeling is pathognomonic of hypoxia-induced PPHN.The regulatory mechanism and cell composition of vascular wall were dysfunction,which led to vascular wall thickened.The review focus on three aspects,such as endothelial cells,smooth muscle cells,and adventitial cells,described the relation and the possible mechanisms between hypoxia-induced PPHN and pulmonary vascular remodeling.