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Enoki Y, Suzuki N, Ito M, Uchiyama E, Kishi N, Ito C, Kitahiro Y, Sakamoto K, Taguchi K, Yokoyama Y, Kizu J, Matsumoto K. Concurrent administration with multivalent metal cation preparations or polycationic polymer preparations inhibits the absorption of raltegravir via its chelation. J Pharm Pharmacol 2020; 72:1361-1369. [PMID: 32657432 DOI: 10.1111/jphp.13330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 06/12/2020] [Accepted: 06/13/2020] [Indexed: 11/29/2022]
Abstract
OBJECTIVES Raltegravir (RAL) that can form chelates with multivalent metal cations shows lateral interactions with multivalent metal cation and polycationic polymer. We investigated the interactions of RAL with multivalent metal cation preparations, Al(OH)3 and LaCO3 , and polycationic polymer preparations, bixalomer (Bxl) and sevelamer (Svl). METHODS Immediately before the oral administration of 40 mg/kg RAL, the rats were administered orally with the vehicle, Al(OH)3 , LaCO3 , Bxl, or Svl, and the time course of RAL serum concentration was followed. The in vitro binding affinity of RAL with multivalent metal cation and polycationic polymer was also evaluated using isothermal titration calorimetry (ITC). RESULTS When Al(OH)3 , LaCO3 , Bxl, or Svl was concomitantly administered with RAL, the maximum concentration and area under the curve were significantly lower than those when RAL was administered alone. ITC showed the interaction of RAL with Al(OH)3 as an enthalpy-driven reaction and its interactions with LaCO3 and Bxl as entropy-enthalpy mixed reactions. CONCLUSIONS The interaction of RAL with Al(OH)3 , LaCO3, Bxl, or Svl can inhibit RAL absorption into the gastrointestinal tract, and thus, the multivalent metal cation and polycationic polymer are the modifying factors that can affect RAL pharmacokinetics.
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Affiliation(s)
- Yuki Enoki
- Division of Pharmacodynamics, Faculty of Pharmacy, Keio University, Tokyo, Japan
| | - Norihiro Suzuki
- Division of Pharmacodynamics, Faculty of Pharmacy, Keio University, Tokyo, Japan
| | - Motoyasu Ito
- Division of Practical Pharmacy, Faculty of Pharmacy, Keio University, Tokyo, Japan
| | - Eri Uchiyama
- Division of Pharmacodynamics, Faculty of Pharmacy, Keio University, Tokyo, Japan
| | - Nagomi Kishi
- Division of Pharmacodynamics, Faculty of Pharmacy, Keio University, Tokyo, Japan
| | - Chihiro Ito
- Division of Pharmacodynamics, Faculty of Pharmacy, Keio University, Tokyo, Japan
| | - Yuki Kitahiro
- Division of Pharmacodynamics, Faculty of Pharmacy, Keio University, Tokyo, Japan
| | - Kazuki Sakamoto
- Division of Practical Pharmacy, Faculty of Pharmacy, Keio University, Tokyo, Japan
| | - Kazuaki Taguchi
- Division of Pharmacodynamics, Faculty of Pharmacy, Keio University, Tokyo, Japan
| | - Yuta Yokoyama
- Division of Practical Pharmacy, Faculty of Pharmacy, Keio University, Tokyo, Japan
| | - Junko Kizu
- Division of Practical Pharmacy, Faculty of Pharmacy, Keio University, Tokyo, Japan
| | - Kazuaki Matsumoto
- Division of Pharmacodynamics, Faculty of Pharmacy, Keio University, Tokyo, Japan.,Division of Practical Pharmacy, Faculty of Pharmacy, Keio University, Tokyo, Japan
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Charbe NB, Zacconi FC, Amnerkar N, Ramesh B, Tambuwala MM, Clementi E. Bio-analytical Assay Methods used in Therapeutic Drug Monitoring of Antiretroviral Drugs-A Review. CURRENT DRUG THERAPY 2019. [DOI: 10.2174/1574885514666181217125550] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Background: Several clinical trials, as well as observational statistics, have exhibited that the advantages of antiretroviral [ARV] treatment for humans with Human Immunodeficiency Virus / Acquired Immune Deficiency Syndrome HIV/AIDS exceed their risks. Therapeutic drug monitoring [TDM] plays a key role in optimization of ARV therapy. Determination of ARV’s in plasma, blood cells, and other biological matrices frequently requires separation techniques capable of high effectiveness, specific selectivity and high sensitivity. High-performance liquid chromatography [HPLC] coupled with ultraviolet [UV], Photodiode array detectors [PDA], Mass spectrophotometer [MS] detectors etc. are the important quantitative techniques used for the estimation of pharmaceuticals in biological samples. </P><P> Objective: This review article is aimed to give an extensive outline of different bio-analytical techniques which have been reported for direct quantitation of ARV’s. This article aimed to establish an efficient role played by the TDM in the optimum therapeutic outcome of the ARV treatment. It also focused on establishing the prominent role played by the separation techniques like HPLC and UPLC along with the detectors like UV and Mass in TDM. </P><P> Methods: TDM is based on the principle that for certain drugs, a close relationship exists between the plasma level of the drug and its clinical effect. TDM is of no value if the relationship does not exist. The analytical methodology employed in TDM should: 1) distinguish similar compounds; 2) be sensitive and precise and 3) is easy to use. </P><P> Results: This review highlights the advancement of the chromatographic techniques beginning from the HPLC-UV to the more advanced technique like UPLC-MS/MS. TDM is essential to ensure adherence, observe viral resistance and to personalize ARV dose regimens. It is observed that the analytical methods like immunoassays and liquid chromatography with detectors like UV, PDA, Florescent, MS, MS/MS and Ultra performance liquid chromatography (UPLC)-MS/MS have immensely contributed to the clinical outcome of the ARV therapy. Assay methods are not only helping physicians in limiting the side effects and drug interactions but also assisting in monitoring patient’s compliance. </P><P> Conclusion: The present review revealed that HPLC has been the most widely used system irrespective of the availability of more sensitive chromatographic technique like UPLC.
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Affiliation(s)
- Nitin B. Charbe
- Departamento de Quimica Organica, Facultad de Quimica y de Farmacia, Pontificia Universidad Catolica de Chile, Av. Vicuna McKenna 4860, Macul, Santiago 7820436, Chile
| | - Flavia C. Zacconi
- Departamento de Quimica Organica, Facultad de Quimica y de Farmacia, Pontificia Universidad Catolica de Chile, Av. Vicuna McKenna 4860, Macul, Santiago 7820436, Chile
| | - Nikhil Amnerkar
- Adv V. R. Manohar Institute of Diploma in Pharmacy, Wanadongri, Hingna Road, Nagpur, Maharashtra 441110, India
| | - B. Ramesh
- Sri Adichunchunagiri University, Sri Adichunchunagiri College of Pharmacy, BG Nagar, Karnataka 571418, India
| | - Murtaza M. Tambuwala
- School of Pharmacy and Pharmaceutical Science, University of Ulster, Coleraine, County Londonderry, Northern Ireland BT52 1SA, United Kingdom
| | - Emilio Clementi
- Clinical Pharmacology Unit, CNR Institute of Neuroscience, Department of Biomedical and Clinical Sciences, Luigi Sacco University Hospital, Universita di Milano, Milan, Italy
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Cottrell ML, Patterson KB, Prince HMA, Jones A, White N, Wang R, Kashuba ADM. Effect of HIV infection and menopause status on raltegravir pharmacokinetics in the blood and genital tract. Antivir Ther 2015; 20:795-803. [PMID: 26040011 DOI: 10.3851/imp2968] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/19/2015] [Indexed: 02/04/2023]
Abstract
BACKGROUND This study describes first dose and steady state pharmacokinetics of raltegravir (RAL) in cervicovaginal fluid (CVF) and blood plasma (BP). METHODS Three cohorts of women were enrolled sequentially in a single-site, open-label pharmacokinetic study of oral raltegravir 400 mg twice daily: HIV-negative premenopausal, HIV-infected premenopausal and HIV-infected post-menopausal women. BP and CVF were collected over 12 h after a single observed dose and at steady state. RAL concentrations were measured by HPLC-MS methods. Data are expressed as median (IQR). The ANOVA rank-sum test was used to evaluate between-group differences in steady state raltegravir exposure (area under the concentration-time curve over the 12-h dosing interval [AUC0-12 h]). RESULTS First dose pharmacokinetics were obtained in HIV-negative premenopausal women and HIV-infected post-menopausal women only. The median (IQR) BP AUC0-12 h was 3,099 (985-5,959) and 4,239 (2,781-13,695) ng•h/ml and the median (IQR) CVF AUC0-12 h was 1,720 (305-5,288) and 13,797 (11,066-19,563) ng•h/ml for HIV-negative premenopausal and HIV-infected post-menopausal women, respectively. All cohorts contributed to steady-state pharmacokinetic profiles. Median (IQR) BP AUC0-12 h did not differ between the groups: 8,436 (3,080-10,111), 5,761 (1,801-10,095) and 6,180 (5,295-8,282) ng•h/ml in HIV-negative premenopausal, HIV-infected premenopausal and HIV-infected post-menopausal women, respectively. There was a trend for lower CVF AUC0-12 h among HIV-negative women 3,164 (1,156-9,540) compared to 11,465 (9,725-17,138) and 9,568 (4,271-24,306) ng•h/ml HIV-infected premenopausal and HIV-infected post-menopausal women, respectively, but this was not statistically significant (P=0.08). HIV-negative premenopausal women had a median (IQR) CVF:BP AUC0-12 h ratio of 0.46 (0.2-1.1), whereas HIV-infected premenopausal and post-menopausal women had median (IQR) CVF:BP AUC0-12 h ratio of 3.9 (1.2-6.7) and 1.4 (0.7-4.3), respectively. CONCLUSIONS This is the first study to investigate RAL exposure in BP and CVF in premenopausal HIV-negative and pre- and post-menopausal HIV-infected women. These data indicate HIV and menopausal status may influence antiretroviral distribution into the female genital tract.
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Affiliation(s)
- Mackenzie L Cottrell
- University of North Carolina at Chapel Hill, Eshelman School of Pharmacy, Chapel Hill, NC, USA
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Waitt CJ, Garner P, Bonnett LJ, Khoo SH, Else LJ. Is infant exposure to antiretroviral drugs during breastfeeding quantitatively important? A systematic review and meta-analysis of pharmacokinetic studies. J Antimicrob Chemother 2015; 70:1928-41. [PMID: 25858354 PMCID: PMC4472329 DOI: 10.1093/jac/dkv080] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Accepted: 03/09/2015] [Indexed: 12/19/2022] Open
Abstract
Objectives The objectives of this study were to summarize antiretroviral drug concentrations in breast milk (BM) and exposure of breast-fed infants. Methods This was a systematic review of pharmacokinetic studies of HIV-positive women taking antiretrovirals that measured drugs in BM. The quality of pharmacokinetic and laboratory methods was assessed using pre-defined criteria. Pooled ratios and 95% CIs were calculated using the generalized inverse variance method and heterogeneity was estimated by the I2 statistic. PubMed Central, SCOPUS and LactMed databases were searched. No date or language restrictions were applied. Searches were conducted up to 10 November 2014. Clinical relevance was estimated by comparing ingested dose with the recommended therapeutic dose for each drug. Results Twenty-four studies were included. There was substantial variability in the clinical and laboratory methods used and in reported results. Relative to maternal plasma (MP), NRTIs accumulate in BM, with BM : MP ratios (95% CI estimates) from 0.89 to 1.21 (14 studies, 1159 paired BM and MP samples). NNRTI estimates were from 0.71 to 0.94 (17 studies, 965 paired samples) and PI estimates were from 0.17 to 0.21 (8 studies, 477 paired samples). Relative to the recommended paediatric doses, a breast-fed infant may ingest 8.4% (95% CI 1.9–15.0), 12.5% (95% CI 2.6–22.3) and 1.1% (95% CI 0–3.6) of lamivudine, nevirapine and efavirenz, respectively, via BM. Conclusions Transfer to untreated infants appears quantitatively important for some NRTIs and NNRTIs. The pharmacokinetic methods varied widely and we propose standards for the design, analysis and reporting of future pharmacokinetic studies of drug transfer during breastfeeding.
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Affiliation(s)
- Catriona John Waitt
- Department of Molecular and Clinical Pharmacology, University of Liverpool, Block A, The Waterhouse Buildings, 1-5 Brownlow Street, Liverpool L69 3GE, UK
| | - Paul Garner
- Clinical Sciences Department, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool L3 5QA, UK
| | - Laura Jayne Bonnett
- Department of Biostatistics, University of Liverpool, Faculty of Health and Life Sciences, 1st Floor Duncan Building, Daulby Street, Liverpool L69 3GA, UK Department of Clinical Infection, Microbiology and Immunology, University of Liverpool, 8 West Derby Street, Liverpool L69 7BE, UK
| | - Saye Hock Khoo
- Department of Molecular and Clinical Pharmacology, University of Liverpool, Block A, The Waterhouse Buildings, 1-5 Brownlow Street, Liverpool L69 3GE, UK
| | - Laura Jayne Else
- Department of Molecular and Clinical Pharmacology, University of Liverpool, Block A, The Waterhouse Buildings, 1-5 Brownlow Street, Liverpool L69 3GE, UK
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Gupta A, Guttikar S, Shah PA, Solanki G, Shrivastav PS, Sanyal M. Selective and rapid determination of raltegravir in human plasma by liquid chromatography-tandem mass spectrometry in the negative ionization mode. J Pharm Anal 2015; 5:101-109. [PMID: 29403921 PMCID: PMC5761471 DOI: 10.1016/j.jpha.2014.10.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2014] [Revised: 09/28/2014] [Accepted: 10/11/2014] [Indexed: 11/30/2022] Open
Abstract
A selective and rapid high-performance liquid chromatography-tandem mass spectrometry method was developed and validated for the quantification of raltegravir using raltegravir-d3 as an internal standard (IS). The analyte and IS were extracted with methylene chloride and n-hexane solvent mixture from 100 µL human plasma. The chromatographic separation was achieved on a Chromolith RP-18e endcapped C18 (100 mm×4.6 mm) column in a run time of 2.0 min. Quantitation was performed in the negative ionization mode using the transitions of m/z 443.1→316.1 for raltegravir and m/z 446.1→319.0 for IS. The linearity of the method was established in the concentration range of 2.0-6000 ng/mL. The mean extraction recovery for raltegravir and IS was 92.6% and 91.8%, respectively, and the IS-normalized matrix factors for raltegravir ranged from 0.992 to 0.999. The application of this method was demonstrated by a bioequivalence study on 18 healthy subjects.
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Affiliation(s)
- Ajay Gupta
- Chemistry Department, Kadi Sarva Vishwavidyalaya, Sarva Vidyalaya Campus, Sector 15/23, Gandhinagar 382015, Gujarat, India
| | - Swati Guttikar
- Bioanalytical Research Department, Veeda Clinical Research, Ambawadi, Ahmedabad 380015, Gujarat, India
| | - Priyanka A Shah
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, Gujarat, India
| | - Gajendra Solanki
- Bioanalytical Research Department, Veeda Clinical Research, Ambawadi, Ahmedabad 380015, Gujarat, India
| | - Pranav S Shrivastav
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, Gujarat, India
| | - Mallika Sanyal
- Chemistry Department, Kadi Sarva Vishwavidyalaya, Sarva Vidyalaya Campus, Sector 15/23, Gandhinagar 382015, Gujarat, India.,Department of Chemistry, St. Xavier׳s College, Navrangpura, Ahmedabad 380009, Gujarat, India
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Raltegravir pharmacokinetics in treatment-naive patients is not influenced by race: results from the raltegravir early therapy in African-Americans living with HIV (REAL) study. Antimicrob Agents Chemother 2012. [PMID: 23183440 DOI: 10.1128/aac.01826-12] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Racial differences in antiretroviral treatment responses remain incompletely explained and may be a consequence of differential pharmacokinetics (PK) associated with race. Raltegravir, an inhibitor of HIV-1 integrase, is commonly used in the treatment of HIV-infected patients, many of whom are African-American. However, there are few data regarding the PK of raltegravir in African-Americans. HIV-infected men and women, self-described as African-American and naive to antiretroviral therapy were treated with raltegravir (RAL) at 400 mg twice a day, plus a fixed dose of tenofovir-emtricitabine (TDF/FTC) at 300 mg/200 mg once daily. Intensive PK sampling was conducted over 24 h at week 4. Drug concentrations at two trough values of 12 and 24 h after dosing (C(12) and C(24)), area under the concentration-curve values (AUC), maximum drug concentration (C(max)), and the time at which this concentration occurred (T(max)) in plasma were estimated with noncompartmental pharmacokinetic methods and compared to data from a subset of white subjects randomized to the RAL twice a day (plus TDF/FTC) arm of the QDMRK study, a phase III study of the safety and efficacy of once daily versus twice daily RAL in treatment naive patients. A total of 38 African-American participants were enrolled (90% male) into the REAL cohort with the following median baseline characteristics: age of 36 years, body mass index (BMI) of 23 kg/m(2), and a CD4 cell count of 339/ml. Plasma HIV RNA levels were below 200 copies/ml in 95% of participants at week 4. The characteristics of the 16 white QDMRK study participants were similar, although fewer (69%) were male, the median age was higher (45 years), and BMI was lower (19 kg/m(2)). There was considerable interindividual variability in RAL concentrations in both cohorts. Median C(12) in REAL was 91 ng/ml (range, 10 to 1,386) and in QDMRK participants was 128 ng/ml (range, 15 to 1,074). The C(max) median concentration was 1,042 ng/ml (range, 196 to 10,092) for REAL and 1,360 ng/ml (range, 218 to 9,701) for QDMRK. There were no significant differences in any RAL PK parameter between these cohorts of African-American and white individuals. Based on plasma PK, and with similar adherence rates, the performance of RAL among HIV-infected African-Americans should be no different than that of infected patients who are white.
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Mosnier-Thoumas S, Djabarouti S, Xuereb F, Lazaro E, Pellegrin JL, Saux MC, Breilh D. A sensitive liquid chromatography coupled with mass spectrometry method for the intracellular and plasma quantification of raltegravir after solid-phase extraction. J Pharm Pharmacol 2011; 63:1559-65. [PMID: 22060286 DOI: 10.1111/j.2042-7158.2011.01368.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
INTRODUCTION Liquid chromatography coupled with mass spectrometry for the quantification of raltegravir in human plasma and peripheral blood mononuclear cells has been developed. METHODS Sample preparations were based on a fully automated solid-phase extraction process. Mass spectrometric data were acquired in a single-ion monitoring method. Raltegravir and quinoxaline, the internal standard, were well separated in a gradient mode over 15 min. KEY FINDINGS Validation study exhibited excellent linearity, with good intra- and inter-day precision and accuracy. CONCLUSIONS The assay was successfully applied to the raltegravir quantification in HIV-infected patients.
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Affiliation(s)
- Stéphanie Mosnier-Thoumas
- Department of Clinical Pharmacokinetics EA 2968, Clinical Pharmacy Haut-Lévêque Hospital CHU Bordeaux, University of Bordeaux 2, Pessac, France
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Müller DM, Rentsch KM. Therapeutic drug monitoring by LC–MS–MS with special focus on anti-infective drugs. Anal Bioanal Chem 2010; 398:2573-94. [DOI: 10.1007/s00216-010-3986-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2010] [Revised: 06/27/2010] [Accepted: 06/29/2010] [Indexed: 10/19/2022]
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Talameh JA, Rezk NL, Kashuba ADM. Quantifying the HIV-1 integrase inhibitor raltegravir in female genital tract secretions using high-performance liquid chromatography with ultraviolet detection. J Chromatogr B Analyt Technol Biomed Life Sci 2010; 878:92-6. [PMID: 19942487 DOI: 10.1016/j.jchromb.2009.11.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2009] [Revised: 10/29/2009] [Accepted: 11/06/2009] [Indexed: 11/17/2022]
Abstract
Understanding the pharmacokinetics of drugs in peripheral body compartments, such as the genital tract, is particularly important in the infectious diseases arena. However, extracting drugs from small volumes of viscous, proteinacious substances like cervicovaginal fluid is particularly challenging. The goal of this study was to develop a method to quantify raltegravir, an HIV-1 integrase inhibitor, in the female genital tract. The method included sample preparation with perchloric acid followed by solid-phase extraction, separation with reverse-phase high-performance liquid chromatography, and detection with an ultraviolet wavelength of 218nm. The method was linear from 0.05 to 10.0mg/L, with minimal endogenous interference. The method was accurate (1.2-11.0% deviation) and precise (1.1-12.6% CV) for both within and between-day analyses. The ability to detect raltegravir in the female genital tract is essential for future investigations of raltegravir as an agent for prevention of HIV acquisition, and this method will be used for clinical studies further evaluating pharmacokinetic-pharmacodynamic relationships in this body compartment.
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Affiliation(s)
- Jasmine A Talameh
- Division of Pharmacotherapy and Experimental Therapeutics, University of North Carolina at Chapel Hill, Eshelman School of Pharmacy, Campus Box #7569, Chapel Hill, NC 27599, USA.
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Goldwirt L, Barrail-Tran A, Da Cruz M, Taburet AM, Furlan V. Quantification of raltegravir (MK0518) in human plasma by high-performance liquid chromatography with photodiode array detection. J Chromatogr B Analyt Technol Biomed Life Sci 2009; 878:456-60. [PMID: 19962949 DOI: 10.1016/j.jchromb.2009.10.029] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2009] [Revised: 10/21/2009] [Accepted: 10/27/2009] [Indexed: 11/18/2022]
Abstract
A precise and accurate high-performance liquid chromatography (HPLC) method with photodiode array detection has been developed and validated for raltegravir, a human immunodeficiency virus integrase strand transfer inhibitor (HIV-1 INSTI). Plasma (300 microL) was extracted with dichloromethane/hexane 50:50 (v/v) after addition of the internal standard, 6,7-dimethyl-2,3-di(2-pyridyl) quinoxaline. The compounds were separated using a dC18 column and detected with ultraviolet detection at 320 nm. The limit of quantification was 10 ng/mL for raltegravir. The method was linear and validated over a concentration range of 0-10,000 ng/mL. The intra-day precision ranged from 3.1 to 12.3%, while the intra-day accuracy ranged from -15.0 to -0.5%, the inter-day precision and accuracy were less than 7%. The mean recovery was 76.8%. Application to clinical samples taken from patients treated with raltegravir indicated that the method is suitable for measuring plasma concentrations of raltegravir in pharmacokinetic studies of clinical trials.
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Affiliation(s)
- Lauriane Goldwirt
- Pharmacie Clinique, Laboratoire de Toxicologie, CHU de Bicêtre AP-HP, 78 avenue du Général Leclerc, 94270 Le Kremlin-Bicêtre, France
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Notari S, Tommasi C, Nicastri E, Bellagamba R, Tempestilli M, Pucillo LP, Narciso P, Ascenzi P. Simultaneous determination of maraviroc and raltegravir in human plasma by HPLC-UV. IUBMB Life 2009; 61:470-5. [PMID: 19319971 DOI: 10.1002/iub.181] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Therapeutic drug monitoring is pivotal to improve the management of HIV infection. Here, a new HPLC-UV method to quantify simultaneously maraviroc and raltegravir levels in human plasma is reported. Remarkably, this is the first method for maraviroc determination in human plasma. The volume of the plasma sample was 600 microL. This method involved automated solid-phase extraction with Oasis HLB Cartridge 1 cc (30 mg divinylbenzene and N-vinylpyrrolidone) and evaporation in a water bath under nitrogen stream. The extracted samples were reconstituted with 200 microL 50/50 of mobile-phase solution (0.01 M KH(2)PO(4) and acetonitrile). Twenty microliters of these samples were injected into a HPLC-UV system, the analytes were eluted on an analytical dC18 Atlantis column (150 mm x 4.6 mm I.D.) with a particle size of 5 microm. The mobile phase (0.01 M KH(2)PO(4) and acetonitrile) was delivered at 1.0 mL/min with isocratic elution. The total run time for a single analysis was 10 min; maraviroc and raltegravir were detected by UV at 197 and 300 nm. The calibration curves were linear up to 2,500 ng/mL. The absolute recovery ranged between 93 and 100%. The HPLC-UV method reported here has been validated and is currently applied to monitor plasma levels of maraviroc and raltegravir in HIV-infected patients.
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Affiliation(s)
- Stefania Notari
- Istituto Nazionale per le Malattie Infettive IRCCS Lazzaro Spallanzani, Roma, Italy
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