1
|
Kumar S, Bouic PJ, Rosenkranz B. A validated stable HPLC method for the simultaneous determination of rifampicin and 25-O-desacetyl rifampicin – evaluation of in vitro metabolism. ACTA CHROMATOGR 2019. [DOI: 10.1556/1326.2018.00361] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Saneesh Kumar
- Division of Clinical Pharmacology, Department of Medicine, University of Stellenbosch, Tygerberg, Cape Town, South Africa
| | - Patrick J. Bouic
- Division of Medical Microbiology, Faculty of Health Sciences, University of Stellenbosch, Cape Town, RSA
- Synexa Life Sciences, Montague Gardens, Cape Town, RSA
| | - Bernd Rosenkranz
- Division of Clinical Pharmacology, Department of Medicine, University of Stellenbosch, Tygerberg, Cape Town, South Africa
| |
Collapse
|
2
|
Tan ND, Yin JH, Yuan Y, Meng L, Xu N. One-Pot Hydrothermal Synthesis of Highly Fluorescent Polyethyleneimine-capped Copper Nanoclusters for Specific Detection of Rifampicin. B KOREAN CHEM SOC 2018. [DOI: 10.1002/bkcs.11449] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Nai-Di Tan
- College of Chemistry and Pharmaceutical Engineering; Jilin Institute of Chemical Technology; Jilin 132022 China
| | - Jian-Hang Yin
- College of Materials Science and Engineering; Jilin Institute of Chemical Technology; Jilin 132022 China
| | - Yaqing Yuan
- College of Materials Science and Engineering; Jilin Institute of Chemical Technology; Jilin 132022 China
| | - Lei Meng
- College of Materials Science and Engineering; Jilin Institute of Chemical Technology; Jilin 132022 China
- College of Sciences; Jilin Institute of Chemical Technology; Jilin 132022 China
| | - Na Xu
- College of Materials Science and Engineering; Jilin Institute of Chemical Technology; Jilin 132022 China
| |
Collapse
|
3
|
Pullen J, Stolk LML, Neef C, Zimmermann LJI. Microanalysis of amoxicillin, flucloxacillin, and rifampicin in neonatal plasma. Biomed Chromatogr 2008; 21:1259-65. [PMID: 17604357 DOI: 10.1002/bmc.881] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Simple and rapid reversed-phase high-performance liquid chromatographic assays with ultraviolet detection have been developed and validated for the determination of amoxicillin, flucloxacillin and rifampicin in neonatal plasma. Plasma samples were either precipitated with perchloric acid (amoxicillin) or methanol (rifampicin) or extracted with methylene chloride (flucloxacillin). Precision coefficients of variation and inaccuracy were less than 15% for all three assays. Only small sample volumes (20-40 microL) were required, making the assays suitable for therapeutic drug monitoring and pharmacokinetic studies in preterm and term neonates. The assays have successfully been applied to analysis of amoxicillin, flucloxacillin and rifampicin in previously published pharmacokinetic studies in neonates.
Collapse
Affiliation(s)
- J Pullen
- Department of Clinical Pharmacy and Toxicology of the University Hospital of Maastricht, Maastricht, The Netherlands.
| | | | | | | |
Collapse
|
4
|
Alonso Lomillo MA, Domínguez Renedo O, Arcos Martínez MJ. Optimization of a cyclodextrin-based sensor for rifampicin monitoring. Electrochim Acta 2005. [DOI: 10.1016/j.electacta.2004.08.032] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
5
|
Alonso Lomillo MA, Kauffmann JM, Arcos Martinez MJ. HRP-based biosensor for monitoring rifampicin. Biosens Bioelectron 2003; 18:1165-71. [PMID: 12788559 DOI: 10.1016/s0956-5663(02)00251-8] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Pyrrole was electropolymerized onto a Pt electrode in the presence of LiClO(4) and horseradish peroxidase (HRP). This HRP-based biosensor has been used for the amperometric detection of rifampicin (RIF) in the presence of a constant concentration of H(2)O(2). The C(H(2)O(2)) as well as the applied potential (E(ap)) and the pH of the phosphate buffer have simultaneously been optimized through a central composite design. Under these conditions, repeatability, reproducibility, and stability of the modified electrode have been analyzed. The detection limit for RIF has been calculated taking into account the probability of false-positive (alpha) and -negative (beta), reaching a value of 5.06x10(-6) mol dm(-3). The biosensor was applied to the determination of RIF in pharmaceutical preparations and biological samples.
Collapse
Affiliation(s)
- M A Alonso Lomillo
- Dpto. de Química, Facultad de Ciencias, Area de Química Analítica, Universidad de Burgos, Plaza Misael Bañuelos, s/n, E-09001, Burgos, Spain
| | | | | |
Collapse
|
6
|
Jain CP, Vyas SP. Preparation and characterization of niosomes containing rifampicin for lung targeting. J Microencapsul 1995; 12:401-7. [PMID: 8583314 DOI: 10.3109/02652049509087252] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Niosomes (non-ionic, surfactant-based vesicles) containing rifampicin of 8-15 microns in diameter were prepared using Span-85 and cholesterol in various molar fractions. The process variables that could affect the physical characteristics of niosomes and in vitro release of the drug from the niosomes were studied and optimized. In vivo distribution studies of the prepared niosomes found that 65% of the drug could be localized in the lungs by controlling the niosome size.
Collapse
Affiliation(s)
- C P Jain
- Department of Pharmaceutical Sciences, Dr H. S. Gour Vishwavidyalaya, Sagar, India
| | | |
Collapse
|
7
|
Maniara WM, Powell ML. Determination of the rifamycin-related hypolipidemic drug CGP 43371 in human feces, plasma and urine by high-performance liquid chromatography. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL APPLICATIONS 1994; 660:135-42. [PMID: 7858706 DOI: 10.1016/0378-4347(94)00277-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A simple, rapid and sensitive normal-phase high-performance liquid chromatographic (HPLC) method was developed and validated for the determination of a novel hypolipidemic agent in human feces, plasma and urine. This experimental drug candidate is structurally related to rifamycin. The compound and internal standard were isolated from biological matrices by a one step liquid-liquid extraction. Separations were achieved on a mu Porasil silica gel column. Recovery and reproducibility assessments indicated good accuracy and precision. The overall mean relative recoveries were 93.3% from feces (0.2-20 micrograms/mg), 95.1% from plasma (20-500 ng/ml) and 97.5% from urine (20-500 ng/ml), with coefficients of variation ranging from 0.7 to 10.0% for feces, 3.0 to 12.7% for plasma and 2.3 to 10.6% for urine. The limits of quantification were 0.2 micrograms/mg for feces and 20 ng/ml for plasma and urine. The method has sufficient sensitivity to support clinical trials, and was utilized to measure concentrations of the compound in fecal, plasma and urine samples from healthy male volunteers who had received a single 800-mg oral dose.
Collapse
Affiliation(s)
- W M Maniara
- Research Department, Ciba-Geigy Corporation, Summit, NY 07901
| | | |
Collapse
|
8
|
Takano T, Kagami Y, Kuwabara Y, Hata S. Column-switching high-performance liquid chromatographic analysis of BO-2727, a new carbapenem antibiotic, in human plasma and urine by direct injection. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL APPLICATIONS 1994; 656:353-8. [PMID: 7987487 DOI: 10.1016/0378-4347(94)00128-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A column-switching high-performance liquid chromatographic method has been developed for the simple and sensitive analysis of BO-2727 (I) in human plasma and urine. Plasma samples were diluted with an equal volume of a stabilizer, and the mixture was directly injected onto the HPLC system. The analyte was enriched in a pre-treatment column, while endogenous components were eluted to waste. The analyte was then backflushed onto an analytical column and quantified with ultraviolet detection. Urinary concentrations were determined in a similar way except that the enriched analyte was eluted in the foreflush mode to a cation-exchange column used for chromatographic separation. The standard curves for the drug were linear in the range of 0.05-50 micrograms/ml in plasma and 0.5-100 micrograms/ml in urine. The limits of quantification for plasma and urine were found to be 0.5 micrograms/ml and 0.5 micrograms/ml, respectively. This method was used to support Phase I clinical pharmacokinetic studies.
Collapse
Affiliation(s)
- T Takano
- Development Research Laboratories, Banyu Pharmaceutical Co., Saitama, Japan
| | | | | | | |
Collapse
|
9
|
Bersier PM, Bersier J. Polarographic, voltammetric, and HPLC-EC of pharmaceutically relevant cyclic compounds. ELECTROANAL 1994. [DOI: 10.1002/elan.1140060303] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
10
|
Yamashita K, Motohashi M, Yashiki T. Automated high-performance liquid chromatographic method for the simultaneous determination of cefotiam and delta 3-cefotiam in human plasma using column switching. JOURNAL OF CHROMATOGRAPHY 1992; 577:174-9. [PMID: 1400738 DOI: 10.1016/0378-4347(92)80616-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
An automated high-performance liquid chromatographic method using column switching was established for the simultaneous determination of cefotiam (I) and delta 3-cefotiam (II) in human plasma after oral administration of cefotiam hexetil dihydrochloride. The method allowed the determination of analytes in plasma by the direct injection of diluted specimen with phosphate buffer. The analytes were enriched onto the C18 short pretreatment column by 0.05 M phosphate buffer (pH 7.7), while proteins and endogenous hydrophilic substances in plasma were washed off to waste. The enriched analytes were then back-flushed onto the analytical C18 column, separated by a mixture of 0.05 M phosphate buffer (pH 7.7)-acetonitrile (88:12, v/v) and detected by the ultraviolet absorbance at 254 nm. Recoveries from spiked plasma were quantitative, and the coefficients of variation were below 4%. The lower detection limits in plasma were 10 ng/ml for both I and II. Concentrations of I and II in plasma determined by the present method were in good agreement with those obtained by the conventional deproteinization method.
Collapse
Affiliation(s)
- K Yamashita
- Takeda Analytical Research Laboratories, Ltd., Osaka, Japan
| | | | | |
Collapse
|
11
|
Swart KJ, Papgis M. Automated high-performance liquid chromatographic method for the determination of rifampicin in plasma. J Chromatogr A 1992; 593:21-4. [PMID: 1639906 DOI: 10.1016/0021-9673(92)80260-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Due to the unstable nature of rifampicin, a rapid automated high-performance liquid chromatographic method had to be developed for the analysis of a large number of plasma samples generated during a bioavailability trial. Extraction and injection of the samples were automatically done by a sample preparation system using C2, 100 mg Bond Elut extraction columns. The extracts were chromatographed on a 4-microns reversed-phase C18 column with a citrate buffer and acetonitrile as mobile phase. The analytes were detected at 342 nm. Calibration curves were linear to at least 20 micrograms/ml and the limit of quantification was 0.16 micrograms/ml.
Collapse
Affiliation(s)
- K J Swart
- Department of Pharmacology, Faculty of Medicine, UOFS, Bloemfontein, South Africa
| | | |
Collapse
|
12
|
Lewis RC, Hatfield NZ, Narang PK. A sensitive method for quantitation of rifabutin and its desacetyl metabolite in human biological fluids by high-performance liquid chromatography (HPLC). Pharm Res 1991; 8:1434-40. [PMID: 1665904 DOI: 10.1023/a:1015865526655] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Sensitive HPLC-UV methodology has been developed and validated for quantitating rifabutin, an antimycobacterial, and its 25-desacetyl metabolite, LM-565, in human plasma and urine. The HPLC separation for both plasma and urine samples was performed on an ODS, 5-microns, reverse-phase column (25 cm x 4.6-cm ID) using a mobile phase of acetonitrile/0.05 M potassium phosphate, pH 4.2, with triethylamine, (38:61.5:0.5, v/v), at a flow rate of 1.0 ml/min. The separation eluate was monitored by absorbance at 275 nm. Plasma samples (1 ml) were spiked with an internal standard (medazepam), buffered at pH 7.4 and extracted with 80:20 (v/v) hexane:ethyl acetate, and then back extracted with acidified water (0.05 M H3PO4). Linearity was established between 5.0-800 and 2.5-400 ng/ml for rifabutin and LM-565, respectively. Intraday imprecision for rifabutin and LM-565 plasma quality controls prepared at 7.3 and 3.2 ng/ml, respectively, was less than 15% relative standard deviation (RSD). Absolute recovery for parent drug and metabolite, from plasma, was greater than 90% throughout the respective dynamic ranges and greater than 70% for medazepam. Urine samples (1 ml) were acidified with 50 microliters of 3.6 M H2SO4 and diluted with 0.1 M ammonium acetate. Linearity was established between 100 and 5000 ng/ml for both rifabutin and LM-565. Intraday imprecision for a urine control at 200 ng/ml was less than or equal to 12% RSD for either component. The method is currently being used to support Phase I kinetics program for rifabutin in prophylaxis of MAC infection of AIDS patients. Application of this method to a bioavailability assessment is presented.
Collapse
Affiliation(s)
- R C Lewis
- Department of Pharmacokinetics/Dynamics, Medical Research Center, Adria Laboratories, Dublin, Ohio 43017
| | | | | |
Collapse
|
13
|
Yamashita K, Motohashi M, Yashiki T. Sensitive high-performance liquid chromatographic determination of ionic drugs in biological fluids with short-wavelength ultraviolet detection using column switching combined with ion-pair chromatography: application to basic compounds. JOURNAL OF CHROMATOGRAPHY 1989; 487:357-63. [PMID: 2723002 DOI: 10.1016/s0378-4347(00)83043-1] [Citation(s) in RCA: 344] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A highly sensitive and selective high-performance liquid chromatographic method with short-wavelength UV detection is described for the determination of ionic compounds in biological fluids, which was applied to two basic compounds, 2-(3-[4-(4-fluorophenyl)-1-piperazinyl]propyl)-6,7,8,9-tetrahydro-2H-nap htho [2,3-b][1,4]oxazin-3(4H)-one (I) and methyl 2-(4-diphenylmethyl-1-piperazinyl)ethyl (+/-)-1,4-dihydro-2,6-dimethyl-4-(m-nitrophenyl)-3,5-pyridinedicarboxyla te (II), in human serum. The method is based on the combination of the column-switching technique and ion-pair chromatography. In the first ODS column, the analyte is pre-separated from endogenous substances in serum by ion-pair chromatography. After column switching, in the second ODS column the heart-cut fraction containing the analyte is further separated by non-ion-pair chromatography from coeluted endogenous substances from the first ODS column. The proposed method offered high sensitivity and selectivity with UV detection at 215 nm for I and 230 nm for II. The detection limits were 0.2 ng/ml for both I and II using 1 ml of serum. The principle of the proposed method would be applicable to both acidic and basic compounds in biological fluids with a suitable ion-pair reagent.
Collapse
Affiliation(s)
- K Yamashita
- Analytical Laboratories, Takeda Chemical Industries, Ltd., Osaka, Japan
| | | | | |
Collapse
|
14
|
Ishii M, Ogata H. Determination of rifampicin and its main metabolites in human plasma by high-performance liquid chromatography. JOURNAL OF CHROMATOGRAPHY 1988; 426:412-6. [PMID: 3392154 DOI: 10.1016/s0378-4347(00)81972-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- M Ishii
- Department of Biopharmaceutics, Meiji College of Pharmacy, Japan
| | | |
Collapse
|
15
|
Chapter 2 Determination of Drugs and Their Metabolites in Biological Samples by Fully Automated Hplc with on-line Solid-Liquid Extraction and Pre-Column Switching. ACTA ACUST UNITED AC 1988. [DOI: 10.1016/s0301-4770(08)60378-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/01/2023]
|
16
|
Berg JD, Ruddock S, Allen-Narker RA, Bradby GV, Davis M, Buckley BM. Drugs as probes of organ function: evaluation of the hepatobiliary axis using oral rifampicin and novel high performance liquid chromatography. Ann Clin Biochem 1987; 24 ( Pt 1):36-40. [PMID: 3827182 DOI: 10.1177/000456328702400105] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Investigation of the uptake and metabolism of drugs by organs such as the liver may allow assessment of specific aspects of organ function. Rifampicin, when orally administered, is transported into the hepatocyte from portal blood and thence passes, with its deacetylated metabolite, into the systemic circulation and into bile. This paper reports an investigation of the pharmacokinetics of a sub-therapeutic oral dose of rifampicin in healthy subjects, in patients with cirrhosis and in subjects with Gilbert's syndrome. The areas under the plasma concentration curves (AUC) in patients with cirrhosis were significantly greater than in healthy subjects. Subjects with Gilbert's syndrome had decreased AUCs compared with healthy subjects and were clearly distinguished from patients with cirrhosis. Rifampicin concentration in serum was measured by HPLC using a novel direct injection technique.
Collapse
|