What is the pathogenesis of pulmonary hypertension in sickle cell disease (SCD)?

Updated: May 12, 2021
  • Author: Joseph E Maakaron, MD; Chief Editor: Emmanuel C Besa, MD  more...
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Answer

A hallmark of this proliferative vasculopathy is the development of pulmonary hypertension in adulthood. Plasma arginase degrades arginine, the substrate for NO synthesis, thereby limiting the expected compensatory increase in NO production and resulting in generation of oxygen radicals. Plasma arginase is also associated with pulmonary hypertension and risk of early mortality.


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