Irnmunochemical stain analysis of lung tissue showed that the expression of GRs in the lung of control preterm rats increased gradually within postnatal 1 week, and then decreased to the stable level gradually after postnatal 1 week.

• 肺组织免疫组织化学染色分析显示生后1周内，对照组大鼠肺内GR表达逐渐增高，1周后逐渐降低到一个稳定水平。