Targeting endothelial and myocardial dysfunction with tetrahydrobiopterin

An L. Moens, Rinrada Kietadisorn, Judy Y. Lin, David Kass

Research output: Contribution to journalReview articlepeer-review

39 Scopus citations


Tetrahydrobiopterin (BH 4) is an essential cofactor for aromatic amino acid hydroxylases and for all three nitric oxide synthase (NOS) isoforms. It also has a protective role in the cell as an antioxidant and scavenger of reactive nitrogen and oxygen species. Experimental studies in humans and animals demonstrate that decreased BH 4-bioavailability, with subsequent uncoupling of endothelial NOS (eNOS) plays an important role in the pathogenesis of endothelial dysfunction, hypertension, ischemia-reperfusion injury, and pathologic cardiac remodeling. Synthetic BH 4 is clinically approved for the treatment of phenylketonuria, and experimental studies support its capacity for ameliorating cardiovascular pathophysiologies. To date, however, the translation of these studies to human patients remains limited, and early results have been mixed. In this review, we discuss the pathophysiologic role of decreased BH 4 bioavailability, molecular mechanisms regulating its metabolism, and its potential therapeutic use as well as pitfalls as an NOS-modulating drug. This article is part of a special issue entitled "Key Signaling Molecules in Hypertrophy and Heart Failure".

Original languageEnglish (US)
Pages (from-to)559-563
Number of pages5
JournalJournal of Molecular and Cellular Cardiology
Issue number4
StatePublished - Oct 2011


  • ENOS-uncoupling
  • Endothelial dysfunction
  • Myocardial dysfunction
  • Sapropterin
  • Tetrahydrobiopterin
  • Ventricular remodeling and heart failure

ASJC Scopus subject areas

  • Molecular Biology
  • Cardiology and Cardiovascular Medicine


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