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2018 Price of Dornase alfa
Lufyllin 200 mg tablet
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Dornase alfa volume of distribution
In studies in rats and monkeys, the initial volume of distribution is similar to the serum volume. Concentrations in sputum decline rapidly after inhalation.
|Solution||respiratory (inhalation)||1 mg/mL|
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What is Dornase alfa
Dornase alfa is a biosynthetic form of human deoxyribunuclease I (DNase I) enzyme. It is produced in genetically modified Chinese hamster ovary (CHO) cells using recombinant DNA technology. The 260-amino acid sequence of dornase alfa is identical to the endogenous human enzyme. Dornase alfa cleaves extracellular DNA to 5?-phosphodinucleotide and 5?-phosphooligonucleotide end products without affecting intracellular DNA. In individuals with cystic fibrosis, extracellular DNA, which is an extremely viscous anion, is released by degenerating leukocytes that accumulate during inflammatory responses to infections. Enzymatic breakdown of this extracellular DNA appears to reduce sputum viscosity and viscoelasticity.
Dornase alfa mechanism of action
Dornase alfa is a biosynthetic form of human DNase I. The enzyme is involved in endonucleolytic cleavage of extracellular DNA to 5?-phosphodinucleotide and 5?-phosphooligonucleotide end products. It has no effect on intracellular DNA. Optimal activity is dependent on the presence of divalent cations such as calcium and magnesium. Extracellular DNA is a viscous anionic polymer and its breakdown appears to improve the viscosity and viscoelasticity of purulent sputum of individuals with CF, thus reducing airflow obstruction. Dornase alfa does not seem to have any effect on non-purulent sputum.
Dosage forms of Dornase alfa
Deoxyribonuclease (human clone 18-1 protein moiety) Dornase alfa, recombinant
Humans and other mammals
Indication of Dornase alfa
Used as adjunct therapy in the treatment of cystic fibrosis.
Toxicity of Dornase alfa
Adverse reactions occur at a frequency of 1/1000 and are usually mild and transient in nature. Reported adverse effects include chest pain (pleuritic/non-cardiac), fever, dyspepsia, voice alteration (hoarseness), pharyngitis, dyspnea, laryngitis, rhinitis, decreased lung function, rash, urticaria, and conjunctivitis. There is no evidence of carcinogenic or mutagenic properties. The safety of dornase alfa has not been studied in pregnant women, nursing women and children under the age of 5 years old.
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