Developmental changes in lung cGMP phosphodiesterase-5 activity, protein, and message.


During transitional circulation, the pulmonary vascular bed undergoes a rapid and profound reduction in both tone and vascular smooth-muscle (VSM) content. 3',5'-Guanylate cyclic monophosphate (cGMP) is a crucial mediator in the regulation of pulmonary vascular resistance (PVR) and VSM proliferation. Hydrolysis of cGMP is achieved predominately by cGMP… (More)


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