Journal
INTERNATIONAL JOURNAL OF PHARMACEUTICS
Volume 222, Issue 1, Pages 109-119Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0378-5173(01)00708-6
Keywords
lysophosphatidylcholine; glycodeoxycholate; sodium taurodihydroxyfusidate; starch microspheres; nasal delivery; absorption enhancers
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This paper investigates the effect of starch microspheres on the absorption enhancing efficiency of various enhancer systems in formulations with insulin after application in the nasal cavity of sheep. The enhancers studied were lysophosphatidylcholine, glycodeoxycholate and sodium taurodihydroxyfusidale, a bile salt derivative. The enhancers were selected on the basis of their perceived or proven mechanism of action and worked predominantly by interacting with the lipid membrane. The bioadhesive starch microspheres were shown to increase synergistically the effect of the absorption enhancers on the transport of the insulin across the nasal membrane. Dependent on the potency of the enhancer system the inclement in absorption enhancement was shown to be from 1.4 times to 5 times that obtained for the absorption enhancer in solution. (C) 2001 Elsevier Science B.V. All rights reserved.
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