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Wang T, Jin C, Jiang W, Zhao T, Xu Y, Li H. Determination of five mTOR inhibitors in human plasma for hepatocellular carcinoma treatment using QuEChERS-UHPLC-MS/MS. J Pharm Biomed Anal 2023; 235:115652. [PMID: 37633163 DOI: 10.1016/j.jpba.2023.115652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 08/14/2023] [Accepted: 08/14/2023] [Indexed: 08/28/2023]
Abstract
A fast and reliable QuEChERS (Quick, Easy, Cheap, Effective, Rugged, and Safe) method for pre-processing combined with Ultra - high performance liquid chromatography - tandem mass spectrometry (UHPLC-MS/MS) was established for the analysis of five mammalian rapamycin target protein (mTOR) inhibitors (vistusertib, AZD8055, pictilisib, everolimus, temsirolimus)in human plasma. Extraction was achieved by addition of acetonitrile to the sample followed by anhydrous magnesium sulfate and 30 mg C18 for salting out and purification, respectively. MTOR inhibitors were detected using selective response monitoring (SRM) under positive ion electrospray mode. Vistusertib, AZD8055 and pictilisib showed good linearity with a range of 1-80 ng/ml, Additionally, the concentration of everolimus and temsirolimus was 2.5-200 ng/ml and10-800 ng/ml, respectively. The linear correlation coefficient (R2) of each analysis was ≥ 0.9950. The limit of detection (LOD) and Limit of Quantitation (LOQ) were 0.015-0.75 ng/ml and 1-10 ng/ml, respectively. This method showed a high accuracy with high recovery rate and excellent stability. This method is fast, accurate and reliable, suitable for quantitative detection of mTOR inhibitors in human plasma.
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Affiliation(s)
- Ting Wang
- College of Chemistry and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, China
| | - Chengcheng Jin
- College of Chemistry and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, China
| | - Wen Jiang
- College of Chemistry and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, China
| | - Tingting Zhao
- College of Pharmacy, Hebei Medical University, Shijiazhuang 050000, China
| | - Yanmei Xu
- Hebei Institute of Drug and Medical Device Inspection, Shijiazhuang, China
| | - Hui Li
- Hebei Institute of Drug and Medical Device Inspection, Shijiazhuang, China.
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Development and validation of a simple and versatile method for the quantification of everolimus loaded in H-ferritin nanocages using UHPLC-MS/MS. J Pharm Biomed Anal 2020; 191:113644. [PMID: 32987250 DOI: 10.1016/j.jpba.2020.113644] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 09/10/2020] [Accepted: 09/13/2020] [Indexed: 11/23/2022]
Abstract
Everolimus (Eve) is an immunosuppressive macrolide that is being analyzed in various biological matrices and fluids. Its antitumor activity makes this drug suitable not only for organ transplantation but also for breast cancer treatments. In the attempt to reduce the incidence and severity of its side effects, Eve was loaded in H-ferritin (HFn), a natural biomolecule that is involved in specific cellular uptake pathways. Thus, Eve pre-complexed with Cu(II) and encapsulated in HFn resulted in an Eve nanoformulation, named HEve. The quantification of HEve was performed using a tailored pH-induced procedure to precipitate H-ferritin. This sample preparation was effective enough to reduce the ion suppression effect on the mass spectrometric responses of Eve in electrospray ionization (ESI). The ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-ESI-MS/MS) system operating in positive ionization mode showed to be a versatile technique in achieving more than 77 % recovery of Eve from the cytoplasmic compartment. This simple, selective and sensitive method enabled the quantification of Eve within the linear range of 2.5-100 ng/mL in matrix spiked with the isotope-labeled internal standard, EveD4. This method was validated according to FDA Guidance. The intracellular distribution of HEve and its accumulation at a cytoplasmic level were studied in breast cancer cell lines. As expected, HEve was more effective than free Eve on sensitive (i.e. BT474) and resistant cell lines, as a result of a better penetration into the target subcellular compartment.
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3
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Jain S, Jadav T, Sahu AK, Kalia K, Sengupta P. An Exploration of Advancement in Analytical Methodology for Quantification of Anticancer Drugs in Biomatrices. ANAL SCI 2019; 35:719-732. [PMID: 30905906 DOI: 10.2116/analsci.19r002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Significant numbers of newer anticancer drugs are regularly entering into the market worldwide to fight against different types of cancers. Analytical methodologies are being developed to quantitate those molecules in a variety of matrices during their drug development stages. Selection of biological matrices for developing bioanalytical methods is based on the mechanism of action, site of action, site of metabolism and route of excretion of the drugs or their metabolites. In this review, we have described the current scenario and advancements in bioanalytical techniques for quantification of different anticancer drugs in a variety of biomatrices with a special emphasis on sample preparation techniques. We have discussed and summarized different bioanalytical aspects for anticancer drugs, which can give direction to the researcher for choosing appropriate techniques for their quantification needs.
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Affiliation(s)
- Sonali Jain
- National Institute of Pharmaceutical Education and Research (NIPER)-Ahmedabad
| | - Tarang Jadav
- National Institute of Pharmaceutical Education and Research (NIPER)-Ahmedabad
| | - Amit Kumar Sahu
- National Institute of Pharmaceutical Education and Research (NIPER)-Ahmedabad
| | - Kiran Kalia
- National Institute of Pharmaceutical Education and Research (NIPER)-Ahmedabad
| | - Pinaki Sengupta
- National Institute of Pharmaceutical Education and Research (NIPER)-Ahmedabad
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Alexovič M, Dotsikas Y, Bober P, Sabo J. Achievements in robotic automation of solvent extraction and related approaches for bioanalysis of pharmaceuticals. J Chromatogr B Analyt Technol Biomed Life Sci 2018; 1092:402-421. [DOI: 10.1016/j.jchromb.2018.06.037] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 06/11/2018] [Accepted: 06/17/2018] [Indexed: 12/27/2022]
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Kočová Vlčková H, Pilařová V, Svobodová P, Plíšek J, Švec F, Nováková L. Current state of bioanalytical chromatography in clinical analysis. Analyst 2018; 143:1305-1325. [DOI: 10.1039/c7an01807j] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Chromatographic methods have become popular in clinical analysis in both routine and research laboratories.
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Affiliation(s)
- H. Kočová Vlčková
- Deparment of Analytical Chemistry
- Faculty of Pharmacy in Hradec Králové
- Charles University
- Hradec Králové
- Czech Republic
| | - V. Pilařová
- Deparment of Analytical Chemistry
- Faculty of Pharmacy in Hradec Králové
- Charles University
- Hradec Králové
- Czech Republic
| | - P. Svobodová
- Deparment of Analytical Chemistry
- Faculty of Pharmacy in Hradec Králové
- Charles University
- Hradec Králové
- Czech Republic
| | - J. Plíšek
- Deparment of Analytical Chemistry
- Faculty of Pharmacy in Hradec Králové
- Charles University
- Hradec Králové
- Czech Republic
| | - F. Švec
- Deparment of Analytical Chemistry
- Faculty of Pharmacy in Hradec Králové
- Charles University
- Hradec Králové
- Czech Republic
| | - L. Nováková
- Deparment of Analytical Chemistry
- Faculty of Pharmacy in Hradec Králové
- Charles University
- Hradec Králové
- Czech Republic
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Guichard N, Guillarme D, Bonnabry P, Fleury-Souverain S. Antineoplastic drugs and their analysis: a state of the art review. Analyst 2017; 142:2273-2321. [DOI: 10.1039/c7an00367f] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We provide an overview of the analytical methods available for the quantification of antineoplastic drugs in pharmaceutical formulations, biological and environmental samples.
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Affiliation(s)
- Nicolas Guichard
- Pharmacy
- Geneva University Hospitals (HUG)
- Geneva
- Switzerland
- School of Pharmaceutical Sciences
| | - Davy Guillarme
- School of Pharmaceutical Sciences
- University of Geneva
- University of Lausanne
- Geneva
- Switzerland
| | - Pascal Bonnabry
- Pharmacy
- Geneva University Hospitals (HUG)
- Geneva
- Switzerland
- School of Pharmaceutical Sciences
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Martin Lo Y, Fermin BC, Weiss LV, Golt C, Yang M, Kuo CF. Menthol as the Flavour Quality Indicator for Tablets Containing Peppermint Oil. FOOD SCI TECHNOL INT 2016. [DOI: 10.1106/108201302028117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
A procedure to assess the flavour quality of water-swellable and soluble tablets containing peppermint oil was developed. Menthol, the predominant ingredient in peppermint oil, was extracted and then analysed using gas chromatography (GC). Sample tablets containing peppermint oil were pulverised, dissolved in double distilled water and then extracted prior to GC analysis. Methyl tert-butyl ether (MTBE) was found to be the most effective amongst the four solvents evaluated for menthol extraction. With the GC column temperature initially held at 60°C for 5 min, a linear program from 60 to 200°C at 4°C/min followed by holding at 200°C for 9 min gave the highest signal-to-noise ratios (SNRs). A discrete peak of menthol was obtained at 19.92 min of retention time. An excellent representation of the total amount of peppermint oil in the tablets was achieved by using the amount of menthol detected by GC, as compared to the results from the Soxhlet method. The most dramatic loss of flavour happened during the first month, whereas only 0.01% reduction was observed afterwards. It is suggested that the proposed procedure could be used for routine quality control of peppermint flavour in water-swellable and soluble tablets.
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Affiliation(s)
- Y. Martin Lo
- Dept. of Nutrition and Food Science, University of Maryland, College Park, MD 20742, USA,
| | - Brenda C. Fermin
- Dept. of Nutrition and Food Science, University of Maryland, College Park, MD 20742, USA
| | - Lori V. Weiss
- Dept. of Animal and Food Sciences, University of Delaware, Newark, DE 19716, USA
| | - C.M. Golt
- Dept. of Plant and Soil Sciences, University of Delaware, Newark, DE 19716, USA
| | - M.L. Yang
- SPI Polyols, New Castle, Delaware 19720, USA
| | - C.-F. Kuo
- Dept. of Foods and Nutrition, Shih Chien University, Taipei, Taiwan
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de Melo AC, Grazziotin-Reisner R, Erlich F, Fontes Dias MS, Moralez G, Carneiro M, Ingles Garces ÁH, Guerra Alves FV, Novaes Neto B, Fuchshuber-Moraes M, Morando J, Suarez-Kurtz G, Ferreira CG. A phase I study of mTOR inhibitor everolimus in association with cisplatin and radiotherapy for the treatment of locally advanced cervix cancer: PHOENIX I. Cancer Chemother Pharmacol 2016; 78:101-9. [PMID: 27206639 DOI: 10.1007/s00280-016-3064-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 05/11/2016] [Indexed: 01/29/2023]
Abstract
BACKGROUND Cervix cancer (CC) represents the fourth most common cancer in women. Treatment involving cisplatin and radiotherapy has been the standard for locally advanced disease. Everolimus inhibits the aberrant activity of mTOR that is part of carcinogenesis in CC. Further everolimus inactivates the HPV E7 oncoprotein and inhibits its proliferation. Preclinical models have suggested that everolimus sensitizes tumoral cells and vasculature to cisplatin and radiotherapy. METHODS In a 3 + 3 design, the trial aimed to treat three dose levels of at least three patients with daily doses of everolimus (2.5, 5 and 10 mg/day), cisplatin and radiotherapy delivered in a 9-week interval in CC patients, stage IIB, IIIA or IIIB. Patients received everolimus from day -7 up to the last day of brachytherapy. Primary objective was to evaluate safety, toxicity and the maximum-tolerated dose (MTD) of everolimus in association with cisplatin and radiotherapy. Pharmacokinetic (PK) parameters and response rates were analyzed as secondary objectives. RESULTS Thirteen patients were enrolled, 6 at 2.5 mg, 3 at 5 mg and 4 at 10 mg. Four patients did not complete the planned schedule, 1 at 2.5 mg presented grade 4 acute renal failure interpreted as dose-limiting toxicity (DLT) and 3 at 10 mg: 1 with disease progression, and 2 with DLTs-1 grade 3 rash and 1 grade 4 neutropenia. PK results were characterized by dose-dependent increases in AUC and C max. CONCLUSIONS The MTD of everolimus in combination with cisplatin and radiotherapy has been defined as 5 mg/day. The data regarding safety and response rates support further studies.
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Affiliation(s)
| | | | - Felipe Erlich
- Brazilian National Cancer Institute, Rio de Janeiro, Brazil
| | | | | | | | | | | | | | | | | | | | - Carlos Gil Ferreira
- Brazilian Clinical Cancer Research Network (RNPCC) - INCA/Decit/MS, D'or Institute of Research and Education (IDOR), Rio de Janeiro, Brazil
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Pharmacokinetics and Long-Term Safety and Tolerability of Everolimus in Renal Transplant Recipients Converted From Cyclosporine. Ther Drug Monit 2015; 38:64-72. [PMID: 26274696 DOI: 10.1097/ftd.0000000000000236] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND Conversion from cyclosporine (CsA) to everolimus (EVR) in kidney transplant recipients receiving mycophenolate sodium (MPS) and corticosteroids has been used to reduce CsA associated toxicities. Nevertheless, exposures produced by the initial EVR dose, the steady state pharmacokinetic and long-term safety and tolerability have not been explored in detail. METHODS Twenty-four stable kidney transplant recipients receiving CSA, MPS, and corticosteroids were converted from CSA to EVR. The initial EVR dose was 3 mg BID. Weekly monitoring of EVR blood concentrations was followed by a full 12 hour pharmacokinetic profile 28 days after conversion. Therapeutic drug monitoring, safety, and tolerability were analyzed during 5 years of follow-up. RESULTS The study population was relatively young (mean of 42 years) with a predominance of males (62%) and White (67%) recipients of kidneys from living (54%) or deceased (46%) donors. Mean time of the conversion was 61 months after transplantation. In the first 7 patients, the initial EVR dose of 3 mg BID resulted in mean EVR trough blood concentration of 14.7 ± 3.7 ng/mL at day 7. The initial EVR dose was then reduced to 2 mg BID for the following 17 patients. Four weeks after conversion, mean EVR dose was 1.7 ± 0.5 mg BID (7 patients were receiving 1 mg BID and 17 were receiving 2 mg BID) resulting in mean EVR trough blood concentration of 4.0 ± 1.4 ng/mL. Whereas mean maximum concentration (13.4 ± 2.8 versus 22.9 ± 7.4 ng/mL, P = 0.003) and mean apparent clearance (232 ± 79 versus 366 ± 173 mL/min, P = 0.016) were higher, mean area under the curve (78.2 ± 22.1 versus 102.5 ± 38.5 ng.h/mL, P = 0.067) and mean C0 (3.7 ± 1.3 versus 4.1 ± 1.5 ng/mL, P = 0.852) were no different comparing patients receiving 1 mg and 2 mg EVR BID. Mean inter-subject variability of area under the curve, trough concentration, and maximum concentration was 38%, 36%, and 38%. EVR treatment was discontinued in 29% of patients due to proteinuria (N = 2), pneumonia (N = 2), dyslipidemia (N = 2), and anemia (N = 1) and MPS dose was reduced in 58% of patients. CONCLUSIONS The initial 3 mg BID dose produced high EVR trough blood concentrations. The 2 mg BID dose appears to be the appropriate initial dose to provide therapeutic concentrations but still requires initial intensive therapeutic monitoring to achieve and maintain blood concentrations within the therapeutic target concentration. The combination of EVR and full dose MPS has limited long-term tolerability and safety.
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Owonikoko TK, Ramalingam SS, Miller DL, Force SD, Sica GL, Mendel J, Chen Z, Rogatko A, Tighiouart M, Harvey RD, Kim S, Saba NF, Pickens A, Behera M, Fu RW, Rossi MR, Auffermann WF, Torres WE, Bechara R, Deng X, Sun SY, Fu H, Gal AA, Khuri FR. A Translational, Pharmacodynamic, and Pharmacokinetic Phase IB Clinical Study of Everolimus in Resectable Non-Small Cell Lung Cancer. Clin Cancer Res 2015; 21:1859-68. [PMID: 25673697 DOI: 10.1158/1078-0432.ccr-14-1998] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Accepted: 01/28/2015] [Indexed: 11/16/2022]
Abstract
PURPOSE The altered PI3K/mTOR pathway is implicated in lung cancer, but mTOR inhibitors have failed to demonstrate efficacy in advanced lung cancer. We studied the pharmacodynamic effects of everolimus in resectable non-small cell lung cancer (NSCLC) to inform further development of these agents in lung cancer. EXPERIMENTAL DESIGN We enrolled 33 patients and obtained baseline tumor biopsy and 2[18F]fluoro-2-deoxy-D-glucose-positron emission tomography/computed tomography (FDG-PET/CT) imaging followed by everolimus treatment (5 or 10 mg daily, up to 28 days), or without intervening treatment for controls. Target modulation by everolimus was quantified in vivo and ex vivo by comparing metabolic activity on paired PET scans and expression of active phosphorylated forms of mTOR, Akt, S6, eIF4e, p70S6K, 4EBP1, and total Bim protein between pretreatment and posttreatment tissue samples. RESULTS There were 23 patients on the treatment arm and 10 controls; median age 64 years; 22 tumors (67%) were adenocarcinomas. There was a dose-dependent reduction in metabolic activity (SUVmax: 29.0%, -21%, -24%; P = 0.014), tumor size (10.1%, 5.8%, -11.6%; P = 0.047), and modulation of S6 (-36.1, -13.7, -77.0; P = 0.071) and pS6 (-41.25, -61.57, -47.21; P = 0.063) in patients treated in the control, 5-mg, and 10-mg cohorts, respectively. Targeted DNA sequencing in all patients along with exome and whole transcriptome RNA-seq in an index patient with hypersensitive tumor was employed to further elucidate the mechanism of everolimus activity. CONCLUSIONS This "window-of-opportunity" study demonstrated measurable, dose-dependent, biologic, metabolic, and antitumor activity of everolimus in early-stage NSCLC.
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Affiliation(s)
- Taofeek K Owonikoko
- Department of Hematology and Medical Oncology, Emory University, Atlanta, Georgia. Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Suresh S Ramalingam
- Department of Hematology and Medical Oncology, Emory University, Atlanta, Georgia. Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Daniel L Miller
- Winship Cancer Institute of Emory University, Atlanta, Georgia. Department of Surgery, Emory University, Atlanta, Georgia
| | - Seth D Force
- Winship Cancer Institute of Emory University, Atlanta, Georgia. Department of Surgery, Emory University, Atlanta, Georgia
| | - Gabriel L Sica
- Winship Cancer Institute of Emory University, Atlanta, Georgia. Department of Pathology, Emory University, Atlanta, Georgia
| | - Jennifer Mendel
- Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Zhengjia Chen
- Winship Cancer Institute of Emory University, Atlanta, Georgia. Department of Statistics and Bioinformatics, Rollins School of Public Health, Emory University, Atlanta, Georgia
| | - Andre Rogatko
- Cedars Sinai Medical Center, Los Angeles, California
| | | | - R Donald Harvey
- Department of Hematology and Medical Oncology, Emory University, Atlanta, Georgia. Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Sungjin Kim
- Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Nabil F Saba
- Department of Hematology and Medical Oncology, Emory University, Atlanta, Georgia. Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Allan Pickens
- Department of Surgery, Emory University, Atlanta, Georgia
| | - Madhusmita Behera
- Department of Hematology and Medical Oncology, Emory University, Atlanta, Georgia
| | - Robert W Fu
- Department of Hematology and Medical Oncology, Emory University, Atlanta, Georgia
| | - Michael R Rossi
- Department of Pathology, Emory University, Atlanta, Georgia. Department of Radiation Oncology, Emory University, Atlanta, Georgia
| | | | | | - Rabih Bechara
- Division of Interventional Pulmonology, Emory University, Atlanta, Georgia
| | - Xingming Deng
- Winship Cancer Institute of Emory University, Atlanta, Georgia. Department of Radiation Oncology, Emory University, Atlanta, Georgia
| | - Shi-Yong Sun
- Department of Hematology and Medical Oncology, Emory University, Atlanta, Georgia. Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Haian Fu
- Winship Cancer Institute of Emory University, Atlanta, Georgia. Department of Pharmacology, Emory University, Atlanta, Georgia
| | - Anthony A Gal
- Winship Cancer Institute of Emory University, Atlanta, Georgia. Department of Pathology, Emory University, Atlanta, Georgia
| | - Fadlo R Khuri
- Department of Hematology and Medical Oncology, Emory University, Atlanta, Georgia. Winship Cancer Institute of Emory University, Atlanta, Georgia.
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Szerkus O, Wolska E, Struck-Lewicka W, Siluk D, Radwańska A, Wiczling P, Chorążewicz J, Sznitowska M, Markuszewski MJ, Kaliszan R. Development and validation of UHPLC method for the determination of cyclosporine A in biological samples. Biomed Chromatogr 2014; 28:802-9. [DOI: 10.1002/bmc.3132] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Oliwia Szerkus
- Department of Biopharmaceutics and Pharmacodynamics; Medical University of Gdańsk; Poland
| | - Eliza Wolska
- Department of Pharmaceutical Technology; Medical University of Gdańsk; Poland
| | | | - Danuta Siluk
- Department of Biopharmaceutics and Pharmacodynamics; Medical University of Gdańsk; Poland
| | - Aleksandra Radwańska
- Department of Biopharmaceutics and Pharmacodynamics; Medical University of Gdańsk; Poland
| | - Paweł Wiczling
- Department of Biopharmaceutics and Pharmacodynamics; Medical University of Gdańsk; Poland
| | | | | | - Michał J. Markuszewski
- Department of Biopharmaceutics and Pharmacodynamics; Medical University of Gdańsk; Poland
| | - Roman Kaliszan
- Department of Biopharmaceutics and Pharmacodynamics; Medical University of Gdańsk; Poland
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Borijihan G, Li Y, Gao J, Bao JJ. Development of a novel 96-well format for liquid-liquid microextraction and its application in the HPLC analysis of biological samples. J Sep Sci 2014; 37:1155-61. [DOI: 10.1002/jssc.201300954] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 02/14/2014] [Accepted: 02/16/2014] [Indexed: 11/05/2022]
Affiliation(s)
- Guirong Borijihan
- Tianjin Key Laboratory for Modern Drug Delivery and High-Efficiency, Collaborative Innovation Center of Chemical Science and Engineering; School of Pharmaceutical Science and Technology; Tianjin University; Tianjin China
| | - Youxin Li
- Tianjin Key Laboratory for Modern Drug Delivery and High-Efficiency, Collaborative Innovation Center of Chemical Science and Engineering; School of Pharmaceutical Science and Technology; Tianjin University; Tianjin China
| | - Jianguo Gao
- Qingdao Entry-Exit Inspection Quarantine Bureau; Shandong China
| | - James J. Bao
- Tianjin Key Laboratory for Modern Drug Delivery and High-Efficiency, Collaborative Innovation Center of Chemical Science and Engineering; School of Pharmaceutical Science and Technology; Tianjin University; Tianjin China
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Prospective Study of Everolimus With Calcineurin Inhibitor-Free Immunosuppression After Heart Transplantation: Results at Four Years. Ann Thorac Surg 2014; 97:888-93. [DOI: 10.1016/j.athoracsur.2013.09.031] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Revised: 09/08/2013] [Accepted: 09/10/2013] [Indexed: 01/13/2023]
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14
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JUNG HJ, GWON MR, PARK J, SEO JJ, SEONG SJ, KIM EH, SUH SR, JEONG JY, LEE HW, YOON YR. Quantitative Determination of Cyclosporine in Human Whole Blood by Ultra-Performance Liquid Chromatography with Triple Quadrupole Tandem Mass Spectrometry. ANAL SCI 2014; 30:293-8. [DOI: 10.2116/analsci.30.293] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Hyun Jin JUNG
- Department of Biomedical Science and Clinical Trial Center, Kyungpook National University Graduate School and Hospital
| | - Mi-Ri GWON
- Department of Biomedical Science and Clinical Trial Center, Kyungpook National University Graduate School and Hospital
- KNU Bio-Medical Convergence Program for Creative Talent, Kyungpook National University Graduate School
| | - Jeonghyeon PARK
- Department of Biomedical Science and Clinical Trial Center, Kyungpook National University Graduate School and Hospital
| | - Jeong Ju SEO
- Department of Biomedical Science and Clinical Trial Center, Kyungpook National University Graduate School and Hospital
| | - Sook Jin SEONG
- Department of Biomedical Science and Clinical Trial Center, Kyungpook National University Graduate School and Hospital
| | - Eun Hee KIM
- School of Nursing, Yeungnam College of Science & Technology
| | - Soon Rim SUH
- College of Nursing, Kyungpook National University
| | - Ji Yun JEONG
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Kyungpook National University School of Medicine
| | - Hae Won LEE
- Department of Biomedical Science and Clinical Trial Center, Kyungpook National University Graduate School and Hospital
| | - Young-Ran YOON
- Department of Biomedical Science and Clinical Trial Center, Kyungpook National University Graduate School and Hospital
- KNU Bio-Medical Convergence Program for Creative Talent, Kyungpook National University Graduate School
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15
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Müller A, Jungen H, Iwersen-Bergmann S, Sterneck M, Andresen-Streichert H. Analysis of Cyclosporin A in Hair Samples From Liver Transplanted Patients. Ther Drug Monit 2013; 35:450-8. [DOI: 10.1097/ftd.0b013e31828abb1d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Population pharmacokinetics of everolimus in cardiac recipients: comedications, ABCB1, and CYP3A5 polymorphisms. Ther Drug Monit 2013; 34:686-94. [PMID: 23131698 DOI: 10.1097/ftd.0b013e318273c899] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
BACKGROUND The aim of this study was, using routine drug monitoring data, to identify patient characteristics that may influence everolimus (EVE) pharmacokinetic parameters and to develop a population pharmacokinetic model to predict EVE whole blood concentrations in cardiac recipients. METHODS Fifty-nine patients were enrolled in the prospective study. Patient's characteristics were recorded including biological covariates and treatments. CYP3A5 and ABCB1 polymorphisms were determined. Seven hundred seventy-five EVE blood samples were collected for routine drug monitoring. Population pharmacokinetic modeling was carried out using the nonlinear mixed-effects modeling program. Results were analyzed according to a 1-compartment pharmacokinetic model with linear absorption and elimination. The model was evaluated using a bootstrap method and a visual predictive check procedure. RESULTS The pharmacokinetic of EVE in cardiac recipients was best described by a 1-compartment model. Interindividual variability was best described by an exponential error model and residual error by a proportional plus additive error model. Estimation of EVE apparent clearance (3.33 ± 0.20 L/h) and apparent volume of distribution (146 ± 33 L) were in accordance with previously published data. Bilirubinemia and cyclosporine significantly influenced EVE clearance. Some covariates that were expected to influence EVE clearance, for example, ABCB1 and CYP3A5 polymorphisms, were not evidenced. No covariates influenced the volume of distribution of EVE. CONCLUSIONS This study is the first population pharmacokinetic model of EVE in heart transplantation patients. It allows a better description of the pharmacokinetics of EVE. The present population pharmacokinetic model allows estimating a priori and a posteriori EVE concentrations in cardiac recipients and could limit the over and under drug exposure in this population.
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MARS: bringing the automation of small-molecule bioanalytical sample preparations to a new frontier. Bioanalysis 2012; 4:1311-26. [DOI: 10.4155/bio.12.77] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background: In recent years, there has been a growing interest in automating small-molecule bioanalytical sample preparations specifically using the Hamilton MicroLab® STAR liquid-handling platform. In the most extensive work reported thus far, multiple small-molecule sample preparation assay types (protein precipitation extraction, SPE and liquid–liquid extraction) have been integrated into a suite that is composed of graphical user interfaces and Hamilton scripts. Using that suite, bioanalytical scientists have been able to automate various sample preparation methods to a great extent. However, there are still areas that could benefit from further automation, specifically, the full integration of analytical standard and QC sample preparation with study sample extraction in one continuous run, real-time 2D barcode scanning on the Hamilton deck and direct Laboratory Information Management System database connectivity. Results: We developed a new small-molecule sample-preparation automation system that improves in all of the aforementioned areas. Conclusion: The improved system presented herein further streamlines the bioanalytical workflow, simplifies batch run design, reduces analyst intervention and eliminates sample-handling error.
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Immunosuppressive Drug Monitoring. Ther Drug Monit 2012. [DOI: 10.1016/b978-0-12-385467-4.00015-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Calcineurin inhibitor-free immunosuppression using everolimus (Certican) after heart transplantation: 2 years' follow-up from the University Hospital Münster. Transplant Proc 2011; 43:1847-52. [PMID: 21693288 DOI: 10.1016/j.transproceed.2010.12.062] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2010] [Accepted: 12/20/2010] [Indexed: 12/11/2022]
Abstract
BACKGROUND Everolimus is a proliferation-signal inhibitor which was introduced for heart transplant recipients in 2004. To date, there are only sparse data about long-term calcineurin inhibitor (CNI)-free immunosuppression using everolimus. METHODS After heart transplantation, patients receiving everolimus were consecutively enrolled. Reasons for switching to everolimus were side effects of CNI immunosuppression, such as deterioration of kidney function and recurrent rejection episodes. All 60 patients underwent standardized switching protocols, 42 patients completed 24-month follow-up. Blood was sampled for lipid status, renal function, routine controls, and levels of immunosuppressive agents. On days 0, 14, and 28, and then every 3 months, echocardiography and physical examination were performed. RESULTS After switching to everolimus, most patients recovered from the side effects. Renal function improved significantly after 24 months (creatinine, 2.1 ± 0.6 vs 1.8 ± 1 mg/dL; P < .001; creatinine clearance, 41.8 ± 22 vs 48.6 ± 21.8 mL/min; P < .001). Median blood pressure increased from 120.0/75.0 mm Hg at baseline to 123.8/80.0 mm Hg at month 24 (P values .008 and .003 for systolic and diastolic pressures, respectively). Tremor, peripheral edema, hirsutism, and gingival hyperplasia markedly improved. Levels of interleukin-6 were stable between baseline and 24-month levels. Temporary adverse events occurred in 8 patients [13.3%: interstitial pneumonia (n = 2), skin disorders (n = 2); reactivated hepatitis B (n = 1), and fever of unknown origin (n = 3)]. CONCLUSION CNI-free immunosuppression using everolimus is safe, with excellent efficacy in maintenance of heart transplant recipients. Arterial hypertension and renal function significantly improved. CNI-induced side effects, such as tremor, peripheral edema, hirsutism, and gingival hyperplasia, markedly improved in most patients.
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Molina AM, Feldman DR, Voss MH, Ginsberg MS, Baum MS, Brocks DR, Fischer PM, Trinos MJ, Patil S, Motzer RJ. Phase 1 trial of everolimus plus sunitinib in patients with metastatic renal cell carcinoma. Cancer 2011; 118:1868-76. [PMID: 21898375 DOI: 10.1002/cncr.26429] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Revised: 05/16/2011] [Accepted: 05/20/2011] [Indexed: 12/31/2022]
Abstract
BACKGROUND Simultaneous inhibition of the vascular epithelial growth factor (VEGF) and the mammalian target of rapamycin (mTOR) pathway may improve treatment response in advanced renal cell carcinoma (RCC). Everolimus, an oral mTOR inhibitor, and sunitinib, an oral tyrosine kinase inhibitor targeting VEGF, are standard agents in the management of metastatic RCC. METHODS Sequential cohorts of 3 to 6 patients with advanced RCC received dose-escalated combinations of sunitinib (37.5 or 50 mg daily, 4 weeks on/2 weeks off) with everolimus (2.5-5 mg daily or 20-30 mg weekly). Dose-limiting toxicities (DLTs) were assessed in the first 6-week cycle to determine maximum tolerated dose (MTD). Pharmacokinetic profiles were obtained. RESULTS Twenty patients (13 clear cell and 7 nonclear cell RCC) were enrolled in 5 cohorts. Daily everolimus was not tolerated when combined with sunitinib; the first 2 patients on the second cohort suffered DLTs. With weekly everolimus, the MTD was 30 mg everolimus on days 7, 14, 21, and 28, plus 37.5 mg sunitinib on days 1 to 28 of a 42-day cycle; however, chronic treatment was associated with grade 3 and 4 toxicities. A schedule of 20 mg everolimus weekly/37.5 mg sunitinib was tolerated as chronic therapy. Five patients (25%) had confirmed partial responses, and 3 had nonclear cell RCC. No unexpected accumulation of everolimus, sunitinib, or N-desethyl sunitinib was observed. CONCLUSIONS The combination of everolimus and sunitinib is associated with significant acute and chronic toxicities and is only tolerated at attenuated doses. Responses were observed in nonclear cell and clear cell RCC.
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Affiliation(s)
- Ana M Molina
- Memorial Sloan-Kettering Cancer Center, New York, New York 10065, USA.
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Katugampola S, Fish R, Wood C, Young K, Da Costa Mathews C. Automated blood sampling to identify pharmacodynamics biomarkers of corticotrophin releasing factor receptor 1 antagonism. J Pharmacol Toxicol Methods 2011; 64:158-63. [DOI: 10.1016/j.vascn.2011.06.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2011] [Revised: 06/22/2011] [Accepted: 06/23/2011] [Indexed: 12/01/2022]
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Prospective study of everolimus with calcineurin inhibitor-free immunosuppression in maintenance heart transplant patients: results at 2 years. Transplantation 2011; 91:1159-65. [PMID: 21478817 DOI: 10.1097/tp.0b013e31821774bd] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
BACKGROUND Few studies have examined everolimus therapy with calcineurin inhibitor (CNI) withdrawal in maintenance heart transplant patients. METHODS In a prospective, single-arm, single-center study, CNI-treated heart transplant patients were converted to everolimus and were followed up for 24 months. The primary endpoints were kidney function and arterial hypertension at 12 and 24 months after conversion. RESULTS Fifty-eight patients were recruited (mean time posttransplant 5.6±3.7 years), 55 of whom (91.7%) had renal impairment. Mean creatinine clearance increased from 43.6±21.1 mL/min to 49.5±21.2 mL/min at month 24 (P=0.02). Median blood pressure increased from 120/80 mm Hg at baseline to 122.5/80 mm Hg (P=0.008 and 0.006 for systolic and diastolic pressure, respectively). Lipid parameters did not change significantly over the 24-month follow-up. Early resolution of most non-renal CNI-related adverse events was sustained. CNI therapy was re-introduced at a mean of 309 days (range, 31-684 days) in eight patients after month 6 due to adverse events (n=13) or withdrawal of consent (n=2). No significant changes in cardiac function parameters were observed. CONCLUSIONS CNI-free immunosuppression with everolimus is an effective and safe option in selected heart transplant maintenance patients. Most adverse effects under everolimus occurred early after conversion and generally resolved without intervention within a few weeks. Refining selection criteria may reduce the need to re-introduce CNI therapy.
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Able SL, Fish RL, Bye H, Booth L, Logan YR, Nathaniel C, Hayter P, Katugampola SD. Receptor localization, native tissue binding and ex vivo occupancy for centrally penetrant P2X7 antagonists in the rat. Br J Pharmacol 2011; 162:405-14. [PMID: 20840537 DOI: 10.1111/j.1476-5381.2010.01025.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
BACKGROUND AND PURPOSE The P2X7 receptor is implicated in inflammation and pain and is therefore a potential target for therapeutic intervention. Here, the development of a native tissue radioligand binding, localization and ex vivo occupancy assay for centrally penetrant P2X7 receptor antagonists is described. EXPERIMENTAL APPROACH Autoradiography studies using the P2X7 antagonist radioligand [³H]-A-804598 were carried out in rat brain and spinal cord. Subsequent in vitro binding and ex vivo occupancy assays were performed using rat cortex homogenate. KEY RESULTS P2X7 expression was shown to be widespread throughout the rat brain, and in the grey matter of the spinal cord. In binding assays in rat cortex homogenate, ∼60% specific binding was achieved at equilibrium. In kinetic binding assays, k(on) and k(off) values of 0.0021·min⁻¹·nM⁻¹ and 0.0070·min⁻¹ were determined, and the K(d) derived from kinetic measurements was consistent with that derived from saturation analysis. Novel P2X7 antagonists inhibited the binding of [³H]-A-804598 to rat cortex P2X7 receptors with K(i) values of <40 nM. In an ex vivo occupancy assay, a P2X7 antagonist dosed orally to rats caused a concentration-dependent inhibition of the specific binding of [³H]-A-804598 to rat cortex. CONCLUSIONS AND IMPLICATIONS The present study describes the development of an assay that allows localization of P2X7 receptors, the measurement of the binding affinity of P2X7 receptor antagonists in native tissue, and provides a means of determining central P2X7 receptor occupancy. These assays could form an important part of a P2X7 drug discovery programme.
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Affiliation(s)
- S L Able
- Pfizer Global Research and Development, Sandwich, UK.
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Bullock KE, Petros WP, Younis I, Uronis HE, Morse MA, Blobe GC, Zafar SY, Gockerman JP, Lager JJ, Truax R, Meadows KL, Howard LA, O’Neill MM, Broadwater G, Hurwitz HI, Bendell JC. A phase I study of bevacizumab (B) in combination with everolimus (E) and erlotinib (E) in advanced cancer (BEE). Cancer Chemother Pharmacol 2011; 67:465-74. [PMID: 21079958 PMCID: PMC4086252 DOI: 10.1007/s00280-010-1507-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2010] [Accepted: 10/26/2010] [Indexed: 10/18/2022]
Abstract
PURPOSE VEGF, mTOR, and EGFR inhibitors have demonstrated anti-tumor and anti-angiogenic effects alone and in combination with each other. This study evaluated the safety, tolerability, and pharmacokinetics of bevacizumab, everolimus, and erlotinib combination. METHODS Doublet therapy consisted of bevacizumab at 10 mg/kg every 14 days and everolimus 5 mg daily which escalated to 10 mg daily. Erlotinib 75 mg daily was added to the phase II dose recommended phase II dose (RPTD) of bevacizumab and everolimus. Dose-limiting toxicity (DLT) was assessed in cycle 1. RESULTS Forty-eight patients with advanced solid malignancies were evaluable for DLT and efficacy. No DLTs were observed in the doublet dose escalation. Two DLTs (grade 3 mucositis and grade 3 rash) were observed with the addition of erlotinib 75 mg daily. Consequently, triplet doses were adjusted and were better tolerated. Four patients had a partial response. Median progression-free survival (PFS) for the doublet therapy was 6.0 months (0.5 to 32+ months) and 5.5 months (0.8 to 27+ months) for the triplet therapy. Systemic exposure of everolimus was significantly higher in combination with erlotinib (476 ± 161 ng h/mL) compared to when given alone (393 ± 156 ng h/mL; P = 0.020). CONCLUSIONS The RPTD for the doublet therapy is bevacizumab 10 mg/kg every 14 days and everolimus 10 mg daily, and the RPTD for the triplet therapy is bevacizumab 5 mg/kg every 14 days, everolimus 5 mg and erlotinib 75 mg daily. Prolonged disease stability was demonstrated in tumors known to respond to mTOR inhibition and potentially resistant to VEGF blockade.
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Affiliation(s)
- Karen E. Bullock
- Duke University Medical Center, Durham, North Carolina, 27710, USA
| | - William P. Petros
- Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, WV, 26506, USA
| | - Islam Younis
- Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, WV, 26506, USA
| | - Hope E. Uronis
- Duke University Medical Center, Durham, North Carolina, 27710, USA
| | - Michael A. Morse
- Duke University Medical Center, Durham, North Carolina, 27710, USA
| | - Gerard C. Blobe
- Duke University Medical Center, Durham, North Carolina, 27710, USA
| | - S. Yousuf Zafar
- Duke University Medical Center, Durham, North Carolina, 27710, USA
| | - Jon P. Gockerman
- Duke University Medical Center, Durham, North Carolina, 27710, USA
| | - Joanne J. Lager
- Duke University Medical Center, Durham, North Carolina, 27710, USA
| | - Roxanne Truax
- Duke University Medical Center, Durham, North Carolina, 27710, USA
| | | | - Leigh A. Howard
- Duke University Medical Center, Durham, North Carolina, 27710, USA
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Clinical recommendations for the use of everolimus in heart transplantation. Transplant Rev (Orlando) 2010; 24:129-42. [PMID: 20619801 DOI: 10.1016/j.trre.2010.01.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2010] [Accepted: 01/20/2010] [Indexed: 01/09/2023]
Abstract
Proliferation signal inhibitors (PSIs), everolimus (EVL), and sirolimus are a group of immunosuppressor agents indicated for the prevention of acute rejection in adult heart transplant recipients. Proliferation signal inhibitors have a mechanism of action with both immunosuppressive and antiproliferative effects, representing an especially interesting treatment option for the prevention and management of some specific conditions in heart transplant population, such as graft vasculopathy or malignancies. Proliferation signal inhibitors have been observed to work synergistically with calcineurin inhibitors (CNIs). Data from clinical trials and from the growing clinical experience show that when administered concomitantly with CNIs, PSIs allow significant dose reductions of the latter without loss of efficacy, a fact that has been associated with stabilization or significant improvement in renal function in patients with CNI-induced nephrotoxicity. The purpose of this article was to review the current knowledge of the role of PSIs in heart transplantation to provide recommendations for the proper use of EVL in cardiac transplant recipients, including indications, treatment regimens, monitoring, and management of the adverse events.
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Ramalingam SS, Harvey RD, Saba N, Owonikoko TK, Kauh J, Shin DM, Sun SY, Strychor S, Tighiouart M, Egorin MJ, Fu H, Khuri FR. Phase 1 and pharmacokinetic study of everolimus, a mammalian target of rapamycin inhibitor, in combination with docetaxel for recurrent/refractory nonsmall cell lung cancer. Cancer 2010; 116:3903-9. [PMID: 20564143 DOI: 10.1002/cncr.25264] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Everolimus is a novel inhibitor of the mammalian target of rapamycin pathway, which is aberrantly activated in nonsmall cell lung cancer (NSCLC). The authors conducted a phase 1 and pharmacokinetic study of everolimus and docetaxel for recurrent NSCLC. METHODS Patients with advanced stage NSCLC and progression after prior platinum-based chemotherapy were eligible. Sequential cohorts were treated with escalating doses of docetaxel (Day 1) and everolimus (orally daily, Days 1-19) every 3 weeks. Pharmacokinetic sampling of everolimus and docetaxel was done in Cycle 1. The primary endpoint was determination of the recommended phase 2 doses of the combination. RESULTS Twenty-four patients were enrolled (median age, 62 years; women, 11; number of prior regimens, 1 [n=13], 2 [n=6], >or=3 [n=5]; Eastern Cooperative Oncology Group performance status, 0 [n=6], 1 [n=17]). The dose-limiting toxicities (DLTs) were fever with grade 3/4 neutropenia, grade 3 fatigue, and grade 3 mucositis. None of the 7 patients treated at the recommended phase 2 dose (docetaxel 60 mg/m2 and everolimus 5 mg daily) experienced DLT. Everolimus area under the concentration time curve (AUC) was not different with 60 or 75 mg/m2 docetaxel. Mean+/-standard deviation AUC-based accumulation factors for everolimus on Days 8 and 15 were 1.16+/-0.37 and 1.42+/-0.42, respectively. Docetaxel Day 1 half-life was 9.4+/-3.4 hours. Among 21 patients evaluable, 1 had a partial response, and 10 had disease stabilization. CONCLUSIONS The recommended phase 2 doses of docetaxel and everolimus for combination therapy are 60 mg/m2 and 5 mg orally daily, respectively. Promising anticancer activity has been noted.
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Affiliation(s)
- Suresh S Ramalingam
- Department of Hematology and Medical Oncology, Emory University, Atlanta, Georgia 30322, USA.
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Automated sample preparation for regulated bioanalysis: an integrated multiple assay extraction platform using robotic liquid handling. Bioanalysis 2010; 2:1023-40. [DOI: 10.4155/bio.10.55] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background: A novel approach for regulated bioanalytical sample preparation has been developed to combine multiple types of extraction techniques into one integrated and automated sample-preparation suite that pairs a graphical user interface with the Hamilton Microlab® STAR robotic liquid handler. Results: The multi-assay sample-preparation suite is composed of three bioanalytical extraction techniques: protein precipitation, solid-phase extraction and liquid–liquid extraction. Validation data provided highly reproducible and robust results for each respective automated extraction technique. Conclusion: The user-friendly graphical user interface and modular method design provide a flexible and versatile approach for routine bioanalytical sample-preparation and is the first fully integrated multiple assay sample-preparation suite for regulated bioanalysis.
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Able SL, Ivarsson M, Fish RL, Clarke TL, McCourt C, Duckworth JM, Napier C, Katugampola SD. Localisation of melanin-concentrating hormone receptor 1 in rat brain and evidence that sleep parameters are not altered despite high central receptor occupancy. Eur J Pharmacol 2009; 616:101-6. [DOI: 10.1016/j.ejphar.2009.06.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2009] [Revised: 05/26/2009] [Accepted: 06/08/2009] [Indexed: 10/20/2022]
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van den Broek I, Sparidans RW, Schellens JH, Beijnen JH. Quantitative bioanalysis of peptides by liquid chromatography coupled to (tandem) mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2008; 872:1-22. [DOI: 10.1016/j.jchromb.2008.07.021] [Citation(s) in RCA: 134] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2008] [Revised: 06/16/2008] [Accepted: 07/12/2008] [Indexed: 12/25/2022]
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O'Donnell A, Faivre S, Burris HA, Rea D, Papadimitrakopoulou V, Shand N, Lane HA, Hazell K, Zoellner U, Kovarik JM, Brock C, Jones S, Raymond E, Judson I. Phase I pharmacokinetic and pharmacodynamic study of the oral mammalian target of rapamycin inhibitor everolimus in patients with advanced solid tumors. J Clin Oncol 2008; 26:1588-95. [PMID: 18332470 DOI: 10.1200/jco.2007.14.0988] [Citation(s) in RCA: 384] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
PURPOSE To identify the optimal regimen and dosage of the oral mammalian target of rapamycin inhibitor everolimus (RAD001). METHODS We performed a dose-escalation study in advanced cancer patients administering oral everolimus 5 to 30 mg/wk, with pharmacokinetic (PK) and pharmacodynamic (PD) studies. PD data prompted investigation of 50 and 70 mg weekly and daily dosing at 5 and 10 mg. RESULTS Ninety-two patients were treated. Dose-limiting toxicity was seen in one patient each at 50 mg/wk (stomatitis and fatigue) and 10 mg/d (hyperglycemia); hence, the maximum-tolerated dose was not reached. S6 kinase 1 activity in peripheral-blood mononuclear cells was inhibited for at least 7 days at doses >or= 20 mg/wk. Area under the curve increased proportional to dose, but maximum serum concentration increased less than proportionally at doses >or= 20 mg/wk. Terminal half-life was 30 hours (range, 26 to 38 hours). Partial responses were observed in four patients, and 12 patients remained progression free for >or= 6 months, including five of 10 patients with renal cell carcinoma. CONCLUSION Everolimus was satisfactorily tolerated at dosages up to 70 mg/wk and 10 mg/d with predictable PK. Antitumor activity and PD in tumors require further clinical investigation. Doses of 20 mg/wk and 5 mg/d are recommended as appropriate starting doses for these studies.
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Tabernero J, Rojo F, Calvo E, Burris H, Judson I, Hazell K, Martinelli E, Ramon y Cajal S, Jones S, Vidal L, Shand N, Macarulla T, Ramos FJ, Dimitrijevic S, Zoellner U, Tang P, Stumm M, Lane HA, Lebwohl D, Baselga J. Dose- and schedule-dependent inhibition of the mammalian target of rapamycin pathway with everolimus: a phase I tumor pharmacodynamic study in patients with advanced solid tumors. J Clin Oncol 2008; 26:1603-10. [PMID: 18332469 DOI: 10.1200/jco.2007.14.5482] [Citation(s) in RCA: 434] [Impact Index Per Article: 27.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
PURPOSE Everolimus is a selective mammalian target of rapamycin (mTOR) inhibitor with promising anticancer activity. In order to identify a rationally based dose and schedule for cancer treatment, we have conducted a tumor pharmacodynamic phase I study in patients with advanced solid tumors. PATIENTS AND METHODS Fifty-five patients were treated with everolimus in cohorts of 20, 50, and 70 mg weekly or 5 and 10 mg daily. Dose escalation depended on dose limiting toxicity (DLT) rate during the first 4-week period. Pre- and on-treatment steady-state tumor and skin biopsies were evaluated for total and phosphorylated (p) protein S6 kinase 1, eukaryotic initiation factor 4E (elF-4E) binding protein 1 (4E-BP1), eukaryotic initiation factor 4G (eIF-4G), AKT, and Ki-67 expression. Plasma trough levels of everolimus were determined on a weekly basis before dosing during the first 4 weeks. RESULTS We observed a dose- and schedule-dependent inhibition of the mTOR pathway with a near complete inhibition of pS6 and peIF-4G at 10 mg/d and >or= 50 mg/wk. In addition, pAKT was upregulated in 50% of the treated tumors. In the daily schedule, there was a correlation between everolimus plasma trough concentrations and inhibition of peIF4G and p4E-BP1. There was good concordance of mTOR pathway inhibition between skin and tumor. Clinical benefit was observed in four patients including one patient with advanced colorectal cancer achieving a partial response. DLTs occurred in five patients: one patient at 10 mg/d (grade 3 stomatitis) and four patients at 70 mg/wk (two with grade 3 stomatitis, one with grade 3 neutropenia, and one with grade 3 hyperglycemia). CONCLUSION Everolimus achieved mTOR signaling inhibition at doses below the DLT. A dosage of 10 mg/d or 50 mg/wk is recommended for further development.
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Affiliation(s)
- Josep Tabernero
- Medical Oncology Department, Vall d'Hebron University Hospital, Universitat Autònoma de Barcelona, [corrected] Barcelona, Spain
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Srinubabu G, Patel RS, Shedbalkar VP, Rao AA, Rao MN, Bandaru VVR. Development and validation of high-throughput liquid chromatography–tandem mass spectrometric method for simultaneous quantification of loratadine and desloratadine in human plasma. J Chromatogr B Analyt Technol Biomed Life Sci 2007; 860:202-8. [DOI: 10.1016/j.jchromb.2007.10.036] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2007] [Revised: 10/18/2007] [Accepted: 10/22/2007] [Indexed: 10/22/2022]
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Li W, Luo S, Hayes M, He H, Tse FLS. Determination of N-methyl-4-isoleucine-cyclosporin (NIM811) in human whole blood by high performance liquid chromatography-tandem mass spectrometry. Biomed Chromatogr 2007; 21:249-56. [PMID: 17221915 DOI: 10.1002/bmc.746] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
A liquid chromatographic method with tandem mass spectrometric detection (LC-MS/MS) for the determination of N-methyl-4-isoleucine-cyclosporin (NIM811) was developed and validated over the concentration range 1-2500 ng/mL in human whole blood using a 0.05 mL sample volume. NIM811 and the internal standard, d(12)-cyclosporin A (d(12)-CsA), were extracted from blood using MTBE via liquid-liquid extraction. After evaporation of the organic solvent and reconstitution, a 10 microL aliquot of the resulting extract was injected onto the LC-MS/MS system. Chromatographic separation of NIM811 and internal standard was performed using a Waters Symmetry RP-8 (50 x 4.6 mm, 3 microm particle size) column. The mobile phase consists of 10 mm ammonium acetate in water (A) and acetonitrile (B), with 45% B from 0 to 0.2 min, 45 to 85% B from 0.2 to 0.8 min and 85% B from 0.8 to 2.2 min. The total run time was 3.5 min with a flow rate of 0.8 mL/min. The method was validated for sensitivity, linearity, reproducibility, stability, dilution integrity and recovery. The precision and accuracy of quality control samples at low (2.00 ng/mL), medium (20.0 and 400 ng/mL) and high (2000 ng/mL) concentrations were in the range 1.1-4.3% relative standard deviation (RSD) and -2.5-10.0% (bias), respectively, from three validation runs. The method has been used to measure the exposure of NIM811 in human subjects.
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Affiliation(s)
- Wenkui Li
- Department of Drug Metabolism and Pharmacokinetics, Novartis Pharmaceuticals Corporation, East Hanover, NJ 07936, USA.
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Wille SMR, Lambert WEE. Recent developments in extraction procedures relevant to analytical toxicology. Anal Bioanal Chem 2007; 388:1381-91. [PMID: 17468854 DOI: 10.1007/s00216-007-1294-z] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2007] [Revised: 04/03/2007] [Accepted: 04/04/2007] [Indexed: 10/23/2022]
Abstract
Sample preparation is an important step in the development of an analytical method but is often regarded as time-consuming, laborious work. Optimum sample preparation leads to enhanced selectivity and sensitivity, however, and reduces amounts of interfering matrix compounds, resulting in less signal suppression or enhancement. Recent developments in extraction techniques that could be of interest in clinical and forensic toxicology, for example liquid-liquid, solid-phase, and headspace extraction, are summarized in this review. The advantages and disadvantages of several extraction techniques are discussed, to enable the reader to choose an appropriate method of extraction for his or her application. Attention is paid to current trends in analytical toxicology, for example miniaturization, high throughput, and automation.
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Affiliation(s)
- Sarah M R Wille
- Laboratory of Toxicology, Ghent University, Harelbekestraat 72, 9000 Gent, Belgium
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Rothenburger M, Zuckermann A, Bara C, Hummel M, Strüber M, Hirt S, Lehmkuhl H. Recommendations for the use of everolimus (Certican) in heart transplantation: results from the second German-Austrian Certican Consensus Conference. J Heart Lung Transplant 2007; 26:305-11. [PMID: 17403469 DOI: 10.1016/j.healun.2007.01.010] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2006] [Revised: 11/08/2006] [Accepted: 01/07/2007] [Indexed: 01/10/2023] Open
Abstract
Everolimus (Certican; Novartis Pharma AG, Basel, Switzerland) represents the latest generation of proliferation signal inhibitors (PSIs). Everolimus is indicated for use as an immunosuppressive drug in renal and heart transplantation. This report reflects the recommendations of the second German-Austrian Certican Consensus Conference, held in January 2006, for the clinical use of everolimus.
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Affiliation(s)
- Markus Rothenburger
- Department of Thoracic and Cardiovascular Surgery, University Hospital Muenster, Muenster, Germany.
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Rothenburger M, Teerling E, Bruch C, Lehmkuhl H, Suwelack B, Bara C, Wichter T, Hinder F, Schmid C, Stypmann J. Calcineurin inhibitor-free immunosuppression using everolimus (Certican) in maintenance heart transplant recipients: 6 months' follow-up. J Heart Lung Transplant 2007; 26:250-7. [PMID: 17346627 DOI: 10.1016/j.healun.2007.01.017] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2006] [Revised: 11/09/2006] [Accepted: 01/08/2007] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Everolimus is a proliferation signal-inhibitor recently introduced in heart transplant recipients. To date, little is known about calcineurin inhibitor (CNI)-free immunosuppression using everolimus. This study reports the results of CNI-free immunosuppression using everolimus. METHODS During a continuous 9-month period, 60 heart transplant recipients were enrolled. Reasons for switching to everolimus were side effects associated with prior CNI immunosuppression. All patients underwent standardized switching protocols and completed 6 months of follow-up. Blood was obtained for lipid status, renal function, routine controls, and levels of immunosuppressive agents. Echocardiography and a physical examination were performed on Days 0, 14, 28, and then every 3 months. RESULTS After switching to everolimus, most patients recovered from the side effects associated with CNIs. Renal function improved significantly after 6 months (creatinine, 2.1 +/- 0.6 vs 1.5 +/- 0.9 mg/dl, p = 0.001; creatinine clearance, 42.2 +/- 21.6 vs 61.8 +/- 23.4 ml/[min x 1.73 m2], p = 0.018). Arterial hypertension improved after 3 months and remained decreased during the observation period. Tremor, peripheral edema, hirsutism, and gingival hyperplasia markedly improved. Adverse events occurred in 8 patients (13.3%), including interstitial pneumonia (n = 2), skin disorders (n = 2), reactivated hepatitis B (n = 1), and fever of unknown origin (n = 3). CONCLUSION Preliminary data suggest that CNI-free immunosuppression using everolimus is safe, with excellent efficacy in maintenance heart transplant recipients. Arterial hypertension and renal function improved significantly. CNI-induced side effects such as tremor, peripheral edema, hirsutism, and gingival hyperplasia markedly improved in most patients.
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Affiliation(s)
- Markus Rothenburger
- Department of Thoracic and Cardiovascular Surgery, University Hospital Muenster, Berlin, Germany.
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Bakhtiar R, Ramos L, Tse FLS. HIGH-THROUGHPUT MASS SPECTROMETRIC ANALYSIS OF XENOBIOTICS IN BIOLOGICAL FLUIDS. J LIQ CHROMATOGR R T 2007. [DOI: 10.1081/jlc-120008809] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- R. Bakhtiar
- a Novartis Institute for Biomedical Research , 59 Route 10, East Hanover, NJ, 07936, U.S.A
| | - Luis Ramos
- a Novartis Institute for Biomedical Research , 59 Route 10, East Hanover, NJ, 07936, U.S.A
| | - Francis L. S. Tse
- a Novartis Institute for Biomedical Research , 59 Route 10, East Hanover, NJ, 07936, U.S.A
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Zhang J, Gage EM, Ji QC, El-Shourbagy TA. A strategy for high-throughput analysis of levosimendan and its metabolites in human plasma samples using sequential negative and positive ionization liquid chromatography/tandem mass spectrometric detection. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2007; 21:2169-76. [PMID: 17631672 DOI: 10.1002/rcm.3046] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Levosimendan (Simdax) is an approved drug in approximately 40 countries and currently in phase III clinical studies in the USA and Europe. An accurate, high-throughput and rugged assay is critical to support these clinical trials. Due to the mechanism of drug metabolism, the drug and its active metabolites often have significant differences in their chemical properties. In order to achieve high assay throughput and low sample volumes, a single bioanalytical assay for the drug and its metabolites is preferred. However, this need may prevent the optimization of both high-performance liquid chromatography (HPLC) and mass spectrometric ionization conditions. The chemical properties of levosimendan are significantly different from those of its two active metabolites, OR-1855 and OR-1896. Here, we present a novel strategy for high-throughput analysis of levosimendan and its metabolites. A 96-well liquid/liquid extraction procedure was developed for sample preparation. A single liquid chromatography/tandem mass spectrometry (LC/MS/MS) system with two separate mobile phases, shared backwash solvent and conditioning solvent, was developed to perform sequential LC separation for levosimendan and the metabolites. Levosimendan was eluted by 5 mM ammonium acetate in 33.3% acetonitrile and detected using negative ionization mode MS/MS monitoring. The metabolites were eluted by 5 mM ammonium acetate and 0.2% acetic acid in 20% acetonitrile and detected with positive ionization mode MS/MS monitoring. The method has been demonstrated to have excellent precision and accuracy, with high assay ruggedness during method validation and clinical sample analysis. The linear dynamic ranges were approximately 200-50,000 pg/mL for levosimendan and approximately 500-130,000 pg/mL for both metabolites. The coefficient of determination (r2) for all analytes was greater than 0.9985. The intra-assay %CVs for QC samples were from 0.9% to 2.0% for levosimendan, 0.9% to 3.2% for OR-1855, and 0.4% to 4.9% for OR-1896. The inter-assay %CVs for QC samples were from 1.2% to 1.8% for levosimendan, 1.3% to 2.7% for OR-1855, and 1.4% to 3.4% for OR-1896. The mean % biases for QC samples were from 1.5% to 5.5% for levosimendan, -1.4% to 2.6% for OR-1855, and -0.3% to 4.5% for OR-1896. By using a single extraction approach coupled with sequential LC/MS/MS analysis for levosimendan and its metabolites, the assay maintained high throughput and low sample volume usage.
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Affiliation(s)
- Jun Zhang
- Department of Drug Analysis, Abbott Laboratories, Abbott Park, IL 60064, USA.
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Li AC, Li Y, Guirguis MS, Caldwell RG, Shou WZ. Advantages of using tetrahydrofuran–water as mobile phases in the quantitation of cyclosporin A in monkey and rat plasma by liquid chromatography–tandem mass spectrometry. J Pharm Biomed Anal 2007; 43:277-84. [PMID: 16887315 DOI: 10.1016/j.jpba.2006.06.040] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2006] [Revised: 06/22/2006] [Accepted: 06/26/2006] [Indexed: 10/24/2022]
Abstract
A new analytical method is described here for the quantitation of anti-inflammatory drug cyclosporin A (CyA) in monkey and rat plasma. The method used tetrahydrofuran (THF)-water mobile phases to elute the analyte and internal standard, cyclosporin C (CyC). The gradient mobile phase program successfully eluted CyA into a sharp peak and therefore improved resolution between the analyte and possible interfering materials compared with previously reported analytical approaches, where CyA was eluted as a broad peak due to the rapid conversion between different conformers. The sharp peak resulted from this method facilitated the quantitative calculation as multiple smoothing and large number of bunching factors were not necessary. The chromatography in the new method was performed at 30 degrees C instead of 65-70 degrees C as reported previously. Other advantages of the method included simple and fast sample extraction-protein precipitation, direct injection of the extraction supernatant to column for analysis, and elimination of evaporation and reconstitution steps, which were needed in solid phase extraction or liquid-liquid extraction reported before. This method is amenable to high-throughput analysis with a total chromatographic run time of 3 min. This approach has been verified as sensitive, linear (0.977-4000 ng/mL), accurate and precise for the quantitation of CyA in monkey and rat plasma. However, compared with the usage of conventional mobile phases, the only drawback of this approach was the reduced detection response from the mass spectrometer that was possibly caused by poor desolvation in the ionization source. This is the first report to demonstrate the advantages of using THF-water mobile phases to elute CyA in liquid chromatography.
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Affiliation(s)
- Austin C Li
- Covance Laboratories Inc., 3301 Kinsman Boulevard, Madison, WI, USA.
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Kovarik JM, Beyer D, Bizot MN, Jiang Q, Allison MJ, Schmouder RL. Pharmacokinetic interaction between verapamil and everolimus in healthy subjects. Br J Clin Pharmacol 2006; 60:434-7. [PMID: 16187976 PMCID: PMC1884822 DOI: 10.1111/j.1365-2125.2005.02434.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
AIMS We sought to define the influence of verapamil, an inhibitor of CYP3A and P-glycoprotein, on the pharmacokinetics of everolimus, a substrate of this enzyme and transporter. METHODS This was a two-period, single-sequence, crossover study in 16 healthy subjects. In period 1 subjects received a single 2 mg oral dose of everolimus. In period 2 they received verapamil 80 mg three times daily for a total of 6 days and a single 2 mg dose of everolimus co-administered on the second day of verapamil therapy. RESULTS During verapamil co-administration, everolimus C(max) increased 2.3-fold (90% CI, 1.9, 2.7) from 21 +/- 8 to 47 +/- 18 ng ml(-1) and AUC increased 3.5-fold (90% CI, 3.1, 3.9) from 115 +/- 45 to 392 +/- 142 ng ml(-1) h. Everolimus half-life was only prolonged to a minor extent (32 +/- 6 vs. 37 +/- 6 h). Verapamil predose concentrations doubled from 32 +/- 16 to 74 +/- 42 ng ml(-1) after single dose administration of everolimus. CONCLUSIONS Multiple dosing with verapamil increased blood concentrations of everolimus after a single dose by an average 3.5-fold. During verapamil treatment, dose reduction for everolimus should be made guided by blood monitoring and for verapamil by blood pressure monitoring.
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Affiliation(s)
- J M Kovarik
- Novartis Pharmaceuticals, Basel, Switzerland.
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Korecka M, Solari SG, Shaw LM. Sensitive, High Throughput HPLC-MS/MS Method With On-line Sample Clean-up for Everolimus Measurement. Ther Drug Monit 2006; 28:484-90. [PMID: 16885715 DOI: 10.1097/00007691-200608000-00002] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
A new HPLC-MS/MS method for everolimus measurement was developed that includes the following features: small sample volume, short run time, fast, simple and cost-efficient sample preparation, assessment of performance of two internal standards (IS), SDZ RAD 223-756 and ascomycin and comparison of the method with an HPLC-MS/MS reference method. The authors established a multiple reaction monitoring positive ion HPLC-MS/MS method with on-line extraction and sample cleanup. This procedure includes: an API 2000 triple quadrupole mass spectrometer with turbo-ion spray, built-in Valco switching valve, an HPLC system; guard column; a Nova-Pak C18 analytical column; washing solution, methanol:30 mM ammonium acetate pH 5.1 (80:20); eluting solution, methanol:30 mM ammonium acetate pH 5.1 (97:3); flow rate 0.8 mL/min; and a run time of 2.8 minutes. The first and third quadrupoles were set to detect the ammonium adduct ion and a high mass fragment of everolimus (m/z 975.5-->908.5), and two ISs: SDZ RAD 223-756 (m/z 989.8-->922.8) and ascomycin (m/z 809.5-->756.5). The LLOQ was 1.0 microg/L for everolimus using either IS. Between day precision ranged from 3.1% to 5.7% for SDZ RAD 223-756 and 6.0% to 8.6% for ascomycin using spiked blood with everolimus concentrations 2.0 to 25.0 microg/L. Absolute recoveries using spiked samples over the range of 2.5 to 25 mug/L averaged 77.3% (SDZ RAD 223-756) and 76.8% (ascomycin). No matrix effect on everolimus was demonstrated based on the mean observed signal detection of 98.6% (SDZ RAD 223-756) and 105% (ascomycin). Comparison of everolimus concentrations obtained using this method with two internal standards with a reference laboratory demonstrated that the mean everolimus concentration obtained with ascomycin was statistically different (lower) than results with the reference method and the method that used SDZ RAD 223-756 as the internal standard gave equivalent results compared with the reference method.
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Affiliation(s)
- Magdalena Korecka
- Department Pathology and Laboratory Medicine, University of Pennsylvania, School of Medicine, Philadelphia, PA 19104, USA
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Salm P, Warnholtz C, Boyd J, Arabshahi L, Marbach P, Taylor PJ. Evaluation of a fluorescent polarization immunoassay for whole blood everolimus determination using samples from renal transplant recipients. Clin Biochem 2006; 39:732-8. [PMID: 16725133 DOI: 10.1016/j.clinbiochem.2006.03.019] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2005] [Revised: 01/11/2006] [Accepted: 03/29/2006] [Indexed: 11/27/2022]
Abstract
OBJECTIVES This study compared the performance of a fluorescent polarization immunoassay (FPIA) against HPLC-tandem mass spectrometry (HPLC-MS) for the measurement of everolimus in renal transplant recipients. DESIGN AND METHODS A total of 333 pre-dose samples from 45 renal transplant patients were analyzed by FPIA and HPLC-MS. RESULTS The inter-batch inaccuracy and precision of the FPIA for control samples were <or=6% and <or=13.0%, respectively (n = 17). The comparison of patient results yielded the Deming regression equation FPIA = 1.19 x HPLC-MS + 0.51. The mean bias was 24.4% (95% CI: -3.0 to 54.2%, range: -30.1% to 79.4%). CONCLUSIONS The FPIA had acceptable analytical performance during the study but compared to HPLC-MS overestimated everolimus in patient samples. This overestimation is probably due to calibration differences between the methods and cross-reactivity of the FPIA antibody with everolimus metabolites. The clinical importance of the observed overestimation by FPIA requires further investigation.
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Affiliation(s)
- Paul Salm
- Australian Bioanalytical Services Pty Ltd, Princess Alexandra Hospital, Brisbane 4102, Australia
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Kovarik JM, Snell GI, Valentine V, Aris R, Chan CKN, Schmidli H, Pirron U. Everolimus in Pulmonary Transplantation: Pharmacokinetics and Exposure–Response Relationships. J Heart Lung Transplant 2006; 25:440-6. [PMID: 16563975 DOI: 10.1016/j.healun.2005.12.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2005] [Revised: 11/29/2005] [Accepted: 12/10/2005] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND In this study we evaluated exposure, safety and efficacy data from an international trial of everolimus. We sought to identify a tolerated and efficacious range for blood levels of this agent in maintenance lung transplant recipients. METHODS In a randomized, double-blind, multicenter trial, 213 maintenance lung transplant recipients received either everolimus 1.5 mg twice daily (n = 101) or azathioprine 1 to 3 mg/kg/day (n = 112) with cyclosporine and corticosteroids. At 15 visits over the first 2 years of the trial, we obtained 826 everolimus trough (C0) blood samples. We used median-effect analysis to assess relationships between everolimus C0 vs efficacy and safety responses. RESULTS Everolimus administration began at 1.5 mg twice daily and was progressively lowered over the first 2 months to an average of 1.2 +/- 0.4 mg twice daily, which was maintained thereafter. This dose yielded median C0 levels of 6.6 ng/ml (10th to 90th percentiles: 2.8 to 11.8 ng/ml). Over this range of everolimus C0, freedom from a decline in pulmonary function with bronchiolitis obliterans syndrome and freedom from biopsy-proven acute rejection were both > or = 88%. The incidence of increased cholesterol (> 6.5 mmol/liter), increased triglycerides (> 2.9 mmol/liter) and transiently decreased platelet count (< 100 x 10(9)/liter) rose significantly with increasing C0. Infections and drug-related adverse events were not significantly related to exposure. CONCLUSIONS A tolerated and efficacious concentration range for everolimus in maintenance lung transplantation appears to be 3 to 12 ng/ml when used in conjunction with cyclosporine and corticosteroids. This range should be prospectively assessed with possible refinement as more clinical experience is gained.
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Baldelli S, Zenoni S, Merlini S, Perico N, Cattaneo D. Simultaneous determination of everolimus and cyclosporine concentrations by HPLC with ultraviolet detection. Clin Chim Acta 2006; 364:354-8. [PMID: 16153624 DOI: 10.1016/j.cca.2005.07.019] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2005] [Revised: 07/29/2005] [Accepted: 07/29/2005] [Indexed: 11/17/2022]
Abstract
In the clinical practice of organ transplantation everolimus (RAD) is used in combination with cyclosporine (CsA), the most common antirejection agent. Both drugs show a narrow therapeutic window, which requires strict monitoring of their blood concentration. Simple methods for simultaneous measurement of RAD and CsA concentration are needed. As we have recently developed an HPLC-UV assay for RAD determination, we decided to implement it to allow concomitant measurement of CsA. The within- and between-day coefficients of variation of the measurement were less than 12.1% for RAD and 9.8% for CsA. The within- and between-day inaccuracy of quality control samples were less than 9.7% for RAD and less than 4.9% for CsA. The method was found accurate and precise and useful for simultaneous therapeutic monitoring of the two drugs.
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Affiliation(s)
- Sara Baldelli
- Department of Medicine and Transplantation, Ospedali Riuniti di Bergamo -, Mario Negri Institute for Pharmacological Research Via Gavazzeni, 11 - 24125, Bergamo, Italy
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Rodila RC, Kim JC, Ji QC, El-Shourbagy TA. A high-throughput, fully automated liquid/liquid extraction liquid chromatography/mass spectrometry method for the quantitation of a new investigational drug ABT-869 and its metabolite A-849529 in human plasma samples. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2006; 20:3067-75. [PMID: 16969771 DOI: 10.1002/rcm.2703] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
ABT-869 is a novel ATP-competitive inhibitor for all the vascular endothelial growth factor (VEGF) and platelet-derived growth factor (PDGF) receptor tyrosine kinases (RTKs). It is one of the oncology drugs in development at Abbott Laboratories and has great potential for enhanced anti-tumor efficacy as well as activity in a broad range of human cancers. We report here an accurate, precise and rugged liquid chromatography/mass spectrometry (LC/MS/MS) assay for the quantitative measurement of ABT-869 and its acid metabolite A-849529. A fully automated 96-well liquid/liquid extraction method was achieved utilizing a Hamilton liquid handler. The only manual intervention required prior to LC/MS/MS injection is to transfer the 96-well plate to a drying rack to dry the extracts then transfer the plate back to the Hamilton for robotic reconstitution. The linear dynamic ranges were from 1.1 to 598.8 ng/mL for ABT-869 and from 1.1 to 605.8 ng/mL for A-849529. The coefficient of determination (r2) for all analytes was greater than 0.9995. For the drug ABT-869, the intra-assay coefficient of variance (CV) was between 0.4% and 3.7% and the inter-assay CV was between 0.9% and 2.8%. The inter-assay mean accuracy, expressed as percent of theoretical, was between 96.8% and 102.2%. For the metabolite A-849529, the intra-assay CV was between 0.5% and 5.1% and the inter-assay CV was between 0.8% and 4.9%. The inter-assay mean accuracy, expressed as percent of theoretical, was between 96.9% and 100.6%.
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Affiliation(s)
- Ramona C Rodila
- Department of Drug Analysis, Abbott Laboratories, Abbott Park, IL 60064, USA.
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Kovarik JM, Beyer D, Schmouder RL. Everolimus drug interactions: application of a classification system for clinical decision making. Biopharm Drug Dispos 2006; 27:421-6. [PMID: 16955532 DOI: 10.1002/bdd.524] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
INTRODUCTION More than half of all drugs used in medical practice are metabolized by cytochrome CYP3A. Coadministration of drugs that share this elimination pathway may lead to pharmacokinetic drug interactions. Efforts are underway by clinical, drug development and regulatory scientists to classify CYP3A-related drug interactions with the ultimate goal of improving guidance for clinical intervention. The CYP3A inhibitory classification system ranks inhibitors according to the fold-increase in area-under-the-curve (AUC) of a probe substrate as: strong (> or =5-fold), moderate (>2.0- to 4.9-fold), or weak (< or =2.0-fold). This classification system was applied to characterize everolimus as a CYP3A substrate.Methods. Five open-label crossover drug interaction studies were performed in 12-16 healthy subjects each. Subjects received a single 2 mg dose of everolimus alone and again during single- or multiple-dose treatment with the probe inhibitors ketoconazole, erythromycin, verapamil, cyclosporine and atorvastatin.Results. The fold-increase in everolimus AUC was: 15.0 with the strong inhibitor ketoconazole; 4.4, 3.5 and 2.7 with the moderate inhibitors erythromycin, verapamil and cyclosporine; and no change with the weak inhibitor atorvastatin. Subjects with low baseline AUCs when everolimus was given alone tended to have AUC increases of a higher magnitude (more potent interaction) in the presence of an inhibitor.Conclusions. Strong CYP3A inhibitors should be avoided when possible during everolimus treatment as compensatory everolimus dose reductions could be difficult to manage. Everolimus therapeutic drug monitoring should be used to guide individualized dose adjustments when moderate CYP3A inhibitors are added to or withdrawn from the regimen. Routine everolimus therapeutic drug monitoring should be sufficient to determine whether dose adjustments are needed when weak CYP3A inhibitors are coadministered. This rational and systematic approach to drug interactions on everolimus yielded clinically useful, structured guidelines for dose adjustment.
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Affiliation(s)
- John M Kovarik
- Novartis Pharmaceuticals, Basel, Switzerland and East Hanover, NJ, USA.
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Immunosuppressants: Pharmacokinetics, methods of monitoring and role of high performance liquid chromatography/mass spectrometry. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.cair.2005.12.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Abstract
Everolimus is a novel proliferation signal inhibitor used in immunosuppressive therapies for the prevention of acute and chronic rejection. A role for everolimus drug monitoring has been suggested because of the potential for improving efficacy and reducing adverse effects. Everolimus has proven efficacy for prevention of rejection in adult de novo renal and cardiac transplant recipients. Similar effects have been shown in pediatric renal transplant patients. Several analytic methods are available to quantify everolimus concentrations. A good relationship exists between everolimus concentration and pharmacological response. Mere clinical monitoring of efficacy is insufficient because clinical presentations of graft rejection vary for each patient and are nonspecific. Thus, the authors have used a previously published 9-step decision-making algorithm to evaluate the utility of therapeutic drug monitoring for everolimus. The recommended therapeutic range for everolimus is a trough concentration of 3 to 8 ng/mL, as concentrations over 3 ng/mL have been associated with a decreased incidence of rejection, and concentrations >8 ng/mL with increased toxicity. Everolimus exhibits interindividual pharmacokinetic variability. African American patients have higher apparent clearance, whereas patients with hepatic dysfunction or those on concomitant medications with potent cytochrome P450 (CYP) 3A4 inhibitor or inducer properties have lower or higher apparent clearance, respectively. Solid organ transplant recipients will likely be maintained on immunosuppressant therapy for the life of the graft and/or recipient and thus are likely to benefit from clinical pharmacokinetic monitoring. Based on the available evidence, therapeutic drug monitoring for everolimus may provide additional information on efficacy and safety than sound clinical judgment alone. Patients on everolimus who have problems with absorption, who take concurrent cytochrome P450 inhibitors or inducers, or are noncompliant will attain the greatest benefit from drug monitoring.
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Affiliation(s)
- Vincent H Mabasa
- Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, British Columbia, Canada
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Kovarik JM, Beyer D, Bizot MN, Jiang Q, Shenouda M, Schmouder RL. Blood concentrations of everolimus are markedly increased by ketoconazole. J Clin Pharmacol 2005; 45:514-8. [PMID: 15831774 DOI: 10.1177/0091270005275368] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The authors sought to quantify the influence of the CYP3A and P-glycoprotein inhibitor ketoconazole on the pharmacokinetics of everolimus in healthy subjects. This was a 2-period, single-sequence, crossover study in 12 healthy subjects. In period 1, subjects received the reference treatment of a single 2-mg dose of everolimus. In period 2, they received the test treatment of ketoconazole 200 mg twice daily for a total of 8 days and a single dose of everolimus coadministered on the fourth day of ketoconazole therapy. The test/reference ratio and 90% confidence interval were derived for everolimus maximum concentration and area under the curve. During ketoconazole coadministration, everolimus maximum concentration increased 3.9-fold (90% confidence interval, 3.4-4.6) from 15 +/- 4 ng/mL to 59 +/- 13 ng/mL. Everolimus area under the curve increased 15.0-fold (90% confidence interval, 13.6-16.6) from 90 +/- 23 ng*h/mL to 1324 +/- 232 ng*h/mL. Everolimus half-life was prolonged by 1.9-fold from 30 +/- 4 hours to 56 +/- 5 hours. Everolimus did not appear to alter ketoconazole predose concentrations. Given the magnitude of this drug interaction, use of ketoconazole should be avoided if possible in everolimus-treated patients.
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Affiliation(s)
- J M Kovarik
- Novartis Pharma, Building WSJ 27.P081, 4002 Basel, Switzerland
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Boudennaia TY, Napoli KL. Validation of a Practical Liquid Chomatography With Ultraviolet Detection Method for Quantification of Whole-Blood Everolimus in a Clinical TDM Laboratory. Ther Drug Monit 2005; 27:171-7. [PMID: 15795648 DOI: 10.1097/01.ftd.0000152681.13647.85] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Until now, only LC/MS methods for quantification of everolimus have been published. The authors validated an LC/UV method for quantification of everolimus from whole blood. The authors sought to improve on the protocol for sirolimus determination previously reported by French et al. Everolimus and the internal standard 32-desmethoxy-rapamycin were extracted from whole blood with n-butyl chloride after precipitation of proteins and then reconstituted in mobile phase and washed with hexane to remove lipids. Everolimus was quantified by reverse-phase chromatography of the extraction product at 60 degrees C, using an isocratic 60% acetonitrile/water mobile phase at a flow rate of 1.0 mL/min. Everolimus eluted at approximately 9.6 minutes, and internal standard at approximately 11.6 minutes. A series of 32 calibration curves were linear over the concentration range of 2-100 ng/mL using 0.5 mL of whole blood per sample with r > 0.990 and slope displaying an 8.8 interassay %CV. At the lower limit of quantification, 2 ng/mL, the percentage bias and %CV were -5.0% and 14.7%, respectively. Intraassay precision at weighed-in levels of 6, 12, and 32 ng/mL were 2.4% to 6.4%, and biases were -10.7% to -8.5%. These same quality control materials yielded -6.3% to -0.8% biases from the expected values and 2.4% to 10.9% interday precision, respectively. This method for everolimus determination, validated according to FDA guidelines, provides longer column life and better sensitivity than that of French et al for sirolimus determination. This protocol also provides acceptable accuracy and precision over the expected therapeutic range and allows 1 technologist using 1 LC/UV system to run up to 5000 samples per year with confidence.
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Affiliation(s)
- Tatiana Y Boudennaia
- Department of Surgery, Division of Immunology and Organ Transplantation, The University of Texas Medical School at Houston, 6431 Fannin Street, Suite 6.233, Houston, Texas 77030, USA.
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