Abstract:
Background:The renal function of individuals is one of the reasons for the variations in therapeutic response to various drugs. Patients with renal impairment are often exposed to drug toxicity, even with drugs that are usually eliminated by hepatic metabolism. Previous study has reported an increased plasma concentration of indoxyl sulfate and decreased plasma concentration of 4β-hydroxy (OH)-cholesterol in stable kidney transplant recipients, implicating indoxyl sulfate as a cytochrome P450 (CYP) inhibiting factor. In this study, we aimed to evaluate the impact of renal impairment severity-dependent accumulation of indoxyl sulfate on hepatic CYP3A activity using metabolic markers. Methods:Sixty-six subjects were enrolled in this study; based on estimated glomerular filtration rate (eGFR), they were classified as having mild, moderate, or severe renal impairment. The plasma concentration of indoxyl sulfate was quantified using liquid chromatography-mass spectrometry (LC-MS). Urinary and plasma markers (6β-OH-cortisol/cortisol, 6β-OH-cortisone/cortisone, 4β-OH-cholesterol) for hepatic CYP3A activity were quantified using gas chromatography-mass spectrometry (GC-MS). The total plasma concentration of cholesterol was measured using the enzymatic colorimetric assay to calculate the 4β-OH-cholesterol/cholesterol ratio. The correlation between variables was assessed using Pearson's correlation test. Results:There was a significant negative correlation between MDRD eGFR and indoxyl sulfate levels. The levels of urinary 6β-OH-cortisol/cortisol and 6β-OH-cortisone/cortisone as well as plasma 4β-OH-cholesterol and 4β-OH-cholesterol/cholesterol were not correlated with MDRD eGFR and the plasma concentration of indoxyl sulfate. Conclusion:Hepatic CYP3A activity may not be affected by renal impairment-induced accumulation of plasma indoxyl sulfate.
journal_name
J Korean Med Scijournal_title
Journal of Korean medical scienceauthors
Kim AH,Yoon S,Lee Y,Lee J,Bae E,Lee H,Kim DK,Lee S,Yu KS,Jang IJ,Cho JYdoi
10.3346/jkms.2018.33.e298subject
Has Abstractpub_date
2018-10-31 00:00:00pages
e298issue
53eissn
1011-8934issn
1598-6357journal_volume
33pub_type
杂志文章abstract:Background:This study aimed to analyze the barriers affecting the utilization of antenatal care (ANC) among Senegalese mothers. Methods:Health facility staffs were surveyed to examine the availability coverage of ANC (infrastructural capacity of health posts to handle maternal and newborn healthcare). A total of 113 w...
journal_title:Journal of Korean medical science
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journal_title:Journal of Korean medical science
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abstract::Default from tuberculosis (TB) treatment could exacerbate the disease and result in the emergence of drug resistance. This study identified the risk factors for default from TB treatment in Korea. This single-center case-control study analyzed 46 default cases and 100 controls. Default was defined as interrupting trea...
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journal_title:Journal of Korean medical science
pub_type: 临床试验,杂志文章
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abstract::Thirty-six cases of necrotizing lymphadenitis--including 33 cases of unknown etiology, 1 typhoid lymphadenopathy, and 2 cases of suspicious lupus lymphadenopathy--were clinico-pathologically reviewed and analyzed with immunostaining for s-100 and lysozyme. All cases histologically showed architectural effacement by pa...
journal_title:Journal of Korean medical science
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abstract::The purpose of the current study was to propose a Korean-specific parameter set for calculating the risk of Down syndrome in the second trimester of pregnancy and to determine the screening performances of triple and quadruple tests in Korean women. Using the data on triple or quadruple screening from three hospitals ...
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journal_title:Journal of Korean medical science
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doi:10.3346/jkms.1995.10.3.216
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journal_title:Journal of Korean medical science
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journal_title:Journal of Korean medical science
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journal_title:Journal of Korean medical science
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journal_title:Journal of Korean medical science
pub_type: 杂志文章
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