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- W2012663219 abstract "Studies of the nasal permeation of small molecules (< 1000 Da) have yielded important information about the integrity of the human airway mucosa in health and disease. In this study, we used a much larger tracer molecule, polysucrose (PS) 15000 (approx. 14700 Da), to predict the mucosal permeation of inhalational allergens. PS 15000 (50 mg/ml; 15 ml), with or without a detergent type of permeation enhancer (dioctyl sodium sulfosuccinate 10 mg/ml), was maintained for 15 min in one nasal cavity of 12 healthy nonatopic subjects by employment of a nasal-pool device. Permeation as determined by the 24-h urine recovery of PS (micro-ELISA analysis assay) was expressed as percentage of nasal instillate. Mean baseline permeation was 0.044% (range 0.009–0.250%). In the presence of the detergent, permeation increased to 0.600% (range 0.007–2.260%) (P<0.01). After oral intake of 750 mg of PS 15 000 (50 μg/ml; 15 ml), the 24-h urinary recovery was 0.013% (range 0.004–0.023%). Our study thus demonstrates a measurable baseline permeation of PS 15 000, an elevated permeation rate in the presence of an epithelium-damaging detergent molecule, and a negligible permeation by the oral route. These properties support the utility of PS 15 000 as a nasal airway permeation tracer. Its size further suggests that its permeation may reflect mucosal perviousness to many allergens." @default.
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- W2012663219 date "1997-12-01" @default.
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- W2012663219 title "Permeation of polysucrose 15 000 across the human nasal mucosa in vivo" @default.
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- W2012663219 doi "https://doi.org/10.1111/j.1398-9995.1997.tb02528.x" @default.
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