The elution profile of immobilized liposome chromatography: determination of association and dissociation rate constants.
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概要
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The interaction of lipophilic cations, tetraphenylphosphonium and triphenylphosphonium homologues with liposomes was investigated using immobilized liposome chromatography (ILC). Large unilamellar liposomes with a mean diameter of 100 nm were stably immobilized in chromatographic gel beads by avidin–biotin. The distribution coefficient calculated from (Ve−V0)/Vs (Ve, retention volume; V0, the void volume; Vs, the stationary phase volume) was found to be independent of flow rate, injection amount and gel bed volume, which is consistent with chromatograph theory. The relationship between the bandwidth and solvent flow rate did not follow band-broadening theories reported thus far. We hypothesized that the solvent might be forced to produce large eddies, spirals or turbulent flow due to the presence of liposomes fixed in the gel. Therefore, we developed a new theory for ILC elution: The column is composed of a number of thin disks containing liposomes and solution, and within each disk the solution is well mixed. This theory accounts for our results, and we were able to use it to estimate the rate constants of association and dissociation of the phosphonium to/from liposomes.
- Elsevier B.V.の論文
- 2004-10-11
著者
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Miyauchi Seiji
Faculty Of Pharmaceutical Science Matsuyama Univ.
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水谷 忠士
Fac. Of Advanced Life Sci. Hokkaido Univ.
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Miyauchi Seiji
Matsuyama University
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Nara Toshifumi
College Of Pharmaceutical Sciences Matsuyama Univ
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Kamo Naoki
Laboratory Of Biophysical Chemistry Faculty Of Advanced Life Science Hokkaido University
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Kamo Naoki
College Of Pharmaceutical Science Matsuyama University Matsuyama Japan
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