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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Effect of uridine 5'-triphosphate plus amiloride on mucociliary clearance in adult cystic fibrosis.

Cystic fibrosis ( CF) is characterized by abnormal airway epithelial electrolyte transport leading to viscous airway secretions that are difficult to clear. By enhancing Cl- secretion onto and blocking Na+ absorption from the airway surface, treatment with aerosolized uridine 5'-triphosphate (UTP) plus amiloride may improve the rheology of airway secretions and enhance mucociliary clearance in patients with CF. After performing safety studies of aerosolized UTP/amiloride in adult patients with CF, we investigated the effects of inhaled vehicle and UTP/amiloride on mucociliary clearance of [99mTc] iron oxide particles from the airways of adult patients with CF (n = 14). We found no clinically significant adverse effects from inhalation of therapeutic doses of UTP/amiloride. Mean baseline peripheral clearance rates during the first 40 min of clearance measurements were significantly less in patients with CF than in normal subjects (mean +/- SE: 0.30 +/- 0.05 versus 0.54 +/- 0.07%/min, respectively; p = 0.01). Aerosolized UTP and amiloride in combination improved mucociliary clearance from the peripheral airways of the CF lungs to near normal values (0.51 +/- 0.09%/min; p = 0.04) during this period. These data support the concept for the use of UTP in combination with amiloride as therapy to improve clearance of secretions from the lungs of patients with CF.[1]


  1. Effect of uridine 5'-triphosphate plus amiloride on mucociliary clearance in adult cystic fibrosis. Bennett, W.D., Olivier, K.N., Zeman, K.L., Hohneker, K.W., Boucher, R.C., Knowles, M.R. Am. J. Respir. Crit. Care Med. (1996) [Pubmed]
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