Abstract:
:To analyze the renal handling of therapeutic compounds observed as a non-linear process with a diffusion phenomenon, we employed a non-linear dispersion model described with a partial differential equation and solved it by using the finite difference method with an implicit scheme in a model dependent analysis. In this study, the renal handling of p-aminohippurate (PAH) was investigated in isolated perfused rat kidney, in which a 50 microl bolus of injection solution containing [3H]PAH and [14C]inulin was administered rapidly into the renal artery. The venous outflows were then collected for 15 min with a fraction collector. The renal extraction ratio of PAH was decreased from 65% to 18% as the PAH concentration in the injection solution was increased from 2 microM to 10 mM. The PAH outflow profile changed as the extraction process became saturated. With the non-linear dispersion model, the Michaelis-Menten parameters for the PAH extraction process were estimated by a model fitting calculation. The calculated values were 0.83 micromol/min/kidney for Vmax and 89 microM for Km. It was demonstrated that the model dependent analysis with a non-linear dispersion model is a useful approach to characterize renal drug handling, and is probably applicable for examining other non-linear processes which involve a diffusion phenomenon.
journal_name
Biol Pharm Bulljournal_title
Biological & pharmaceutical bulletinauthors
Aiba T,Kubota S,Koizumi Tdoi
10.1248/bpb.22.633subject
Has Abstractpub_date
1999-06-01 00:00:00pages
633-41issue
6eissn
0918-6158issn
1347-5215journal_volume
22pub_type
杂志文章abstract::Beta-D-Xylosidase (EC 3.2.1.37) has been purified from ginsenoside Ra-metabolizing Bifidobacterium breve K-110, which was isolated from human intestinal microflora. beta-D-Xylosidase was purified to apparent homogeneity by a combination of ammonium sulfate precipitation, QAE-cellulose, butyl-toyopearl, hydroxyapatit a...
journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.b16-00319
更新日期:2016-01-01 00:00:00
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.31.2097
更新日期:2008-11-01 00:00:00
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journal_title:Biological & pharmaceutical bulletin
pub_type: 临床试验,杂志文章
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更新日期:2015-01-01 00:00:00
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章,评审
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更新日期:2001-10-01 00:00:00
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.b18-00451
更新日期:2018-01-01 00:00:00
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.30.2268
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.30.1097
更新日期:2007-06-01 00:00:00
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.30.2027
更新日期:2007-11-01 00:00:00
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.20.632
更新日期:1997-06-01 00:00:00
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.18.1081
更新日期:1995-08-01 00:00:00
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.b14-00139
更新日期:2014-01-01 00:00:00
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.b17-00162
更新日期:2017-12-01 00:00:00
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.19.824
更新日期:1996-06-01 00:00:00
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章,评审
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.27.2042
更新日期:2004-12-01 00:00:00
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.b13-00846
更新日期:2014-01-01 00:00:00
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.32.1819
更新日期:2009-11-01 00:00:00
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.34.128
更新日期:2011-01-01 00:00:00
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.25.342
更新日期:2002-03-01 00:00:00
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.b15-00124
更新日期:2015-01-01 00:00:00
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.b15-00306
更新日期:2015-01-01 00:00:00
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.b14-00219
更新日期:2014-01-01 00:00:00
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.28.1444
更新日期:2005-08-01 00:00:00
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journal_title:Biological & pharmaceutical bulletin
pub_type: 杂志文章
doi:10.1248/bpb.35.796
更新日期:2012-01-01 00:00:00