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Brunet Cabré M, Okumu F, McKelvey K. Electrochemical Detection of Tenofovir through Quenching of Chloride Ion-Mediated Gold Electrodissolution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:4314-4320. [PMID: 38353065 DOI: 10.1021/acs.langmuir.3c03563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Tenofovir (TNF) is a nucleotide reverse transcriptase inhibitor used as an antiviral medication to treat human immunodeficiency virus (HIV) and hepatitis B virus infections. The extensive use of TNF can result in its release into the environment, and there is growing interest in developing simple and cost-effective methods for detecting TNF. We report that the electrochemical dissolution of gold in a chloride ion-containing electrolyte is suppressed in the presence of TNF. The quenching of the gold electrodissolution response is the result of the adsorption of TNF onto the gold surface. A simple analysis shows that we can relate the degree of TNF surface coverage to the relative size of the quenching of the gold electrodissolution response and follow the time-dependent absorption of TNF onto the gold electrode surface.
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Affiliation(s)
- Marc Brunet Cabré
- School of Chemistry, Trinity College Dublin, Dublin D02 PN4, Ireland
| | - Fredrick Okumu
- Jaramogi Oginga Odinga University of Science and Technology, P.O. Box 201, Bondo 40601, Kenya
| | - Kim McKelvey
- School of Chemical and Physical Sciences and MacDiarmid Institute for Advanced Materials and Nanotechnology, Victoria University of Wellington, P.O. Box 600, Wellington 6012, New Zealand
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2
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Mahajan N, Mujtaba MA, Fule R, Thakre S, Akhtar MS, Alavudeen SS, Anwer MK, Aldawsari MF, Mahmood D, Alam MS. Self-Emulsifying Drug Delivery System for Enhanced Oral Delivery of Tenofovir: Formulation, Physicochemical Characterization, and Bioavailability Assessment. ACS OMEGA 2024; 9:8139-8150. [PMID: 38405505 PMCID: PMC10882655 DOI: 10.1021/acsomega.3c08565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 01/10/2024] [Accepted: 01/22/2024] [Indexed: 02/27/2024]
Abstract
Tenofovir (TNF) is a common component of many antiretroviral therapy regimens, but it is associated with poor membrane permeability and low oral bioavailability. To improve its oral bioavailability and membrane permeability, a self-emulsifying drug delivery system (SEDDS) was developed and characterized, and its relative bioavailability was compared to the marketed tablets (Tenof). Based on solubility and ternary phase diagram analysis, eucalyptus oil was selected as an oil phase, Kolliphor EL, and Kollisolv MCT 70 were chosen as surfactant and cosurfactant, respectively, while glycerol was used as cosolvent in surfactant mixture. Optimized SEDDS formulation F6 showed an oil droplet size of 98.82 nm and zeta potential of -13.03 mV, indicating the high stability of oil droplets. Differential scanning calorimetry, X-ray diffraction, and scanning electron microscopy characterization studies were also carried out to assess the amorphous and morphological states of the drug in the prepared SEDDS formulation. The in vitro dissolution profile of SEDDS shows the rapid release of the drug. SEDDS F6 demonstrates a higher drug permeability than the plain TNF and TNF-marketed tablets (Tenof). A pharmacokinetic study in rats revealed that SEDDS F6 showed significantly higher Cmax and AUC0-t than the marketed tablets and pure drug suspension. In addition, the relative bioavailability of SEDDS formulation dramatically improved by 21.53-fold compared to marketed tablets and 66.27-fold compared to pure drugs. These findings show that SEDDS composed of eucalyptus oil, glycerol, Kolliphor EL, and Kollisolv MCT 70 could be a useful tool for enhancing physiochemical properties and oral TNF absorption. Therefore, SEDDS has shown promise in improving the oral bioavailability of poorly water-soluble drugs.
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Affiliation(s)
- Nilesh Mahajan
- Department
of Pharmaceutics, Dadasaheb Balpande College
of Pharmacy, Besa, Nagpur, Maharashtra 440037, India
| | - Md Ali Mujtaba
- Department
of Pharmaceutics, Faculty of Pharmacy, Northern
Border University, Rafhaa 73213, Saudi Arabia
| | - Ritesh Fule
- Department
of Pharmaceutics and Quality Assurance, Dadasaheb Balpande College of Pharmacy, Besa, Nagpur, Maharashtra 440037, India
| | - Sonali Thakre
- Department
of Pharmaceutics, Dadasaheb Balpande College
of Pharmacy, Besa, Nagpur, Maharashtra 440037, India
| | - Md Sayeed Akhtar
- Department
of Clinical Pharmacy, College of Pharmacy, King Khalid University, Abha 62223, Saudi Arabia
| | - Sirajudeen S. Alavudeen
- Department
of Clinical Pharmacy, College of Pharmacy, King Khalid University, AL-Fara, Abha 62223, Saudi Arabia
| | - Md Khalid Anwer
- Department
of Pharmaceutics, College of Pharmacy, Prince
Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi Arabia
| | - Mohammed F. Aldawsari
- Department
of Pharmaceutics, College of Pharmacy, Prince
Sattam Bin Abdulaziz University, Al Kharj 11942, Saudi Arabia
| | - Danish Mahmood
- Department
of Pharmacology and Toxicology, College of Pharmacy, Qassim University, Buraydah, 51452, Saudi Arabia
| | - Md Sarfaraz Alam
- Department
of Pharmaceutics, HIMT Group of Institutions, Knowledge Park 1, Gautam Buddh Nagar
District, Greater Noida, Uttar Pradesh 201301, India
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Fotooh Abadi L, Kumar P, Paknikar K, Gajbhiye V, Kulkarni S. Tenofovir-tethered gold nanoparticles as a novel multifunctional long-acting anti-HIV therapy to overcome deficient drug delivery-: an in vivo proof of concept. J Nanobiotechnology 2023; 21:19. [PMID: 36658575 PMCID: PMC9850711 DOI: 10.1186/s12951-022-01750-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 12/20/2022] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND The adoption of Antiretroviral Therapy (ART) substantially extends the life expectancy and quality of HIV-infected patients. Yet, eliminating the latent reservoirs of HIV to achieve a cure remains an unmet need. The advent of nanomedicine has revolutionized the treatment of HIV/AIDS. The present study explores a unique combination of Tenofovir (TNF) with gold nanoparticles (AuNPs) as a potential therapeutic approach to overcome several limitations of the current ART. RESULTS TNF-tethered AuNPs were successfully synthesized. Cell viability, genotoxicity, haemolysis, and histopathological studies confirmed the complete safety of the preparation. Most importantly, its anti-HIV1 reverse transcriptase activity was ~ 15 folds higher than the native TNF. In addition, it exhibited potent anti-HIV1 protease activity, a much sought-after target in anti-HIV1 therapeutics. Finally, the in vivo biodistribution studies validated that the AuNPs could reach many tissues/organs, serving as a secure nest for HIV and overcoming the problem of deficient drug delivery to HIV reservoirs. CONCLUSIONS We show that the combination of TNF and AuNPs exhibits multifunctional activity, viz. anti-HIV1 and anti-HIV1 protease. These findings are being reported for the first time and highlight the prospects of developing AuNP-TNF as a novel next-generation platform to treat HIV/AIDS.
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Affiliation(s)
- Leila Fotooh Abadi
- grid.419119.50000 0004 1803 003XDivision of Virology, Indian Council of Medical Research-National AIDS Research Institute, Pune, 411 026 India
| | - Pramod Kumar
- grid.417727.00000 0001 0730 5817Nanobioscience Group, Agharkar Research Institute, Pune, 411 004 India
| | - Kishore Paknikar
- grid.417727.00000 0001 0730 5817Nanobioscience Group, Agharkar Research Institute, Pune, 411 004 India ,grid.417971.d0000 0001 2198 7527Department of Chemistry, Indian Institute of Technology, Mumbai, 400 076 India
| | - Virendra Gajbhiye
- grid.417727.00000 0001 0730 5817Nanobioscience Group, Agharkar Research Institute, Pune, 411 004 India
| | - Smita Kulkarni
- grid.419119.50000 0004 1803 003XDivision of Virology, Indian Council of Medical Research-National AIDS Research Institute, Pune, 411 026 India
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Highly Sensitive Determination of Tenofovir in Pharmaceutical Formulations and Patients Urine—Comparative Electroanalytical Studies Using Different Sensing Methods. Molecules 2022; 27:molecules27061992. [PMID: 35335355 PMCID: PMC8949160 DOI: 10.3390/molecules27061992] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 03/11/2022] [Accepted: 03/16/2022] [Indexed: 02/01/2023] Open
Abstract
This paper discusses the electrochemical behavior of antiviral drug Tenofovir (TFV) and its possible applicability towards electroanalytical determination with diverse detection strategies using square-wave voltammetry. Namely, oxidation processes were investigated using glassy carbon electrode with graphene oxide surface modification (GO/GCE), while the reduction processes, related to the studied analyte, were analyzed at a renewable silver amalgam electrode (Hg(Ag)FE). Scanning electron microscopy imaging confirmed the successful deposition of GO at the electrode surface. Catalytic properties of graphene oxide were exposed while being compared with those of bare GCE. The resultant modification of GCE with GO enhanced the electroactive surface area by 50% in comparison to the bare one. At both electrodes, i.e., GO/GCE and Hg(Ag)FE, the TFV response was used to examine and optimize the influence of square-wave excitation parameters, i.e., square wave frequency, step potential and amplitude, and supporting electrolyte composition and its pH. Broad selectivity studies were performed with miscellaneous interfering agents influence, including ascorbic acid, selected saccharides and aminoacids, metal ions, non-opioid analgesic metamizole, non-steroidal anti-inflammatory drug omeprazole, and several drugs used along with TFV treatment. The linear concentration range for TFV determination at GO/GCE and Hg(Ag)FE was found to be 0.3–30.0 µmol L–1 and 0.5–7.0 µmol L–1, respectively. The lowest LOD was calculated for GO/GCE and was equal to 48.6 nmol L–1. The developed procedure was used to detect TFV in pharmaceutical formulations and patient urine samples and has referenced utilization in HPLC studies.
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Kokkirala TK, Kancherla P, Alegete P, Suryakala D. A simple alternative and improved HPLC method for the estimation of doravirine, lamivudine, and tenofovir disoproxil fumarate in solid oral dosage form. Biomed Chromatogr 2021; 35:e5121. [PMID: 33760252 DOI: 10.1002/bmc.5121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 03/16/2021] [Accepted: 03/19/2021] [Indexed: 11/09/2022]
Abstract
A novel method was developed for the simultaneous estimation of the doravirine, lamivudine, and tenofovir disoproxil fumarate in the pharmaceutical dosage form. The chromatogram was run through an Ascentis C18 column (150 × 4.6 mm, 2.7 μm), with the mobile phase consisting of a phosphate buffer and acetonitrile in the ratio of 50:50 (v/v). The mobile phase was pumped through the column at a flow rate of 1 mL/min. The column temperature was maintained at 30°C. The optimized wavelength for doravirine, lamivudine, and tenofovir disoproxil fumarate was 230.0 nm. The retention times for doravirine, lamivudine, and tenofovir disoproxil were 2.222, 2.764, and 3.403 min, respectively; the relative standard deviation (%) values of method precision for doravirine, lamivudine, and tenofovir disoproxil were 0.6, 0.6, and 0.1, respectively. The % recovery was 100.20%, 100.15%, and 100.36% for doravirine, lamivudine, and tenofovir disoproxil fumarate, respectively. The limit of detection and limit of quantification values were obtained from regression equations of doravirine, lamivudine, and tenofovir disoproxil fumarate, and were 0.24 and 0.73 ppm, 0.53 and 1.60 ppm, and 0.47 and 1.43 ppm, respectively. The regression equations of doravirine, lamivudine, and tenofovir disoproxil fumarate were y = 17,541x + 117,303, y = 15,555x + 10,791, and y = 15,250x + 31,663, respectively. The method developed was accurate, simple, precise, sensitive, and economical. Hence, it could be adopted for regular quality control for estimation of doravirine, lamivudine, and tenofovir disoproxil fumarate in pharmaceutical industries.
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Affiliation(s)
- Tej Kumar Kokkirala
- Department of Chemistry, GITAM University, Visakhapatnam, Andhra Pradesh, India
| | - Prasad Kancherla
- Institute of Science and Technology, JNTU, Hyderabad, Telangana, India
| | - Pallavi Alegete
- Department of Chemistry, JNTUH College of Engineering, Jagtial, Telangana, 505501, India
| | - Duvvuri Suryakala
- Department of Chemistry, GITAM University, Visakhapatnam, Andhra Pradesh, India
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Ashok Bhairav B, Jayram Chavan M. Method Development and Validation for Estimation of TinofovirDisproxil Fumarate in Pharmaceutical Preparation by UV-Spectroscopy and HPLC With Force Degradation Study. ASIAN JOURNAL OF PHARMACEUTICAL RESEARCH AND HEALTH CARE 2021. [DOI: 10.18311/ajprhc/2021/26050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Charbe NB, Zacconi FC, Amnerkar N, Ramesh B, Tambuwala MM, Clementi E. Bio-analytical Assay Methods used in Therapeutic Drug Monitoring of Antiretroviral Drugs-A Review. CURRENT DRUG THERAPY 2019. [DOI: 10.2174/1574885514666181217125550] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Background: Several clinical trials, as well as observational statistics, have exhibited that the advantages of antiretroviral [ARV] treatment for humans with Human Immunodeficiency Virus / Acquired Immune Deficiency Syndrome HIV/AIDS exceed their risks. Therapeutic drug monitoring [TDM] plays a key role in optimization of ARV therapy. Determination of ARV’s in plasma, blood cells, and other biological matrices frequently requires separation techniques capable of high effectiveness, specific selectivity and high sensitivity. High-performance liquid chromatography [HPLC] coupled with ultraviolet [UV], Photodiode array detectors [PDA], Mass spectrophotometer [MS] detectors etc. are the important quantitative techniques used for the estimation of pharmaceuticals in biological samples. </P><P> Objective: This review article is aimed to give an extensive outline of different bio-analytical techniques which have been reported for direct quantitation of ARV’s. This article aimed to establish an efficient role played by the TDM in the optimum therapeutic outcome of the ARV treatment. It also focused on establishing the prominent role played by the separation techniques like HPLC and UPLC along with the detectors like UV and Mass in TDM. </P><P> Methods: TDM is based on the principle that for certain drugs, a close relationship exists between the plasma level of the drug and its clinical effect. TDM is of no value if the relationship does not exist. The analytical methodology employed in TDM should: 1) distinguish similar compounds; 2) be sensitive and precise and 3) is easy to use. </P><P> Results: This review highlights the advancement of the chromatographic techniques beginning from the HPLC-UV to the more advanced technique like UPLC-MS/MS. TDM is essential to ensure adherence, observe viral resistance and to personalize ARV dose regimens. It is observed that the analytical methods like immunoassays and liquid chromatography with detectors like UV, PDA, Florescent, MS, MS/MS and Ultra performance liquid chromatography (UPLC)-MS/MS have immensely contributed to the clinical outcome of the ARV therapy. Assay methods are not only helping physicians in limiting the side effects and drug interactions but also assisting in monitoring patient’s compliance. </P><P> Conclusion: The present review revealed that HPLC has been the most widely used system irrespective of the availability of more sensitive chromatographic technique like UPLC.
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Affiliation(s)
- Nitin B. Charbe
- Departamento de Quimica Organica, Facultad de Quimica y de Farmacia, Pontificia Universidad Catolica de Chile, Av. Vicuna McKenna 4860, Macul, Santiago 7820436, Chile
| | - Flavia C. Zacconi
- Departamento de Quimica Organica, Facultad de Quimica y de Farmacia, Pontificia Universidad Catolica de Chile, Av. Vicuna McKenna 4860, Macul, Santiago 7820436, Chile
| | - Nikhil Amnerkar
- Adv V. R. Manohar Institute of Diploma in Pharmacy, Wanadongri, Hingna Road, Nagpur, Maharashtra 441110, India
| | - B. Ramesh
- Sri Adichunchunagiri University, Sri Adichunchunagiri College of Pharmacy, BG Nagar, Karnataka 571418, India
| | - Murtaza M. Tambuwala
- School of Pharmacy and Pharmaceutical Science, University of Ulster, Coleraine, County Londonderry, Northern Ireland BT52 1SA, United Kingdom
| | - Emilio Clementi
- Clinical Pharmacology Unit, CNR Institute of Neuroscience, Department of Biomedical and Clinical Sciences, Luigi Sacco University Hospital, Universita di Milano, Milan, Italy
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Ozcelikay G, Dogan-Topal B, Ozkan SA. An Electrochemical Sensor Based on Silver Nanoparticles-Benzalkonium Chloride for the Voltammetric Determination of Antiviral Drug Tenofovir. ELECTROANAL 2018. [DOI: 10.1002/elan.201700753] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Goksu Ozcelikay
- Ankara University, Faculty of Pharmacy, Department of Analytical Chemistry; 06100, Tandogan Ankara TURKEY
| | - Burcu Dogan-Topal
- Ankara University, Faculty of Pharmacy, Department of Analytical Chemistry; 06100, Tandogan Ankara TURKEY
| | - Sibel A. Ozkan
- Ankara University, Faculty of Pharmacy, Department of Analytical Chemistry; 06100, Tandogan Ankara TURKEY
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Establishment of HK-2 Cells as a Relevant Model to Study Tenofovir-Induced Cytotoxicity. Int J Mol Sci 2017; 18:ijms18030531. [PMID: 28257038 PMCID: PMC5372547 DOI: 10.3390/ijms18030531] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 02/24/2017] [Accepted: 02/25/2017] [Indexed: 02/06/2023] Open
Abstract
Tenofovir (TFV) is an antiviral drug approved for treating Human Immunodeficiency Virus (HIV) and Hepatitis B. TFV is administered orally as the prodrug tenofovir disoproxil fumarate (TDF) which then is deesterified to the active drug TFV. TFV induces nephrotoxicity characterized by renal failure and Fanconi Syndrome. The mechanism of this toxicity remains unknown due to limited experimental models. This study investigated the cellular mechanism of cytotoxicity using a human renal proximal tubular epithelial cell line (HK-2). HK-2 cells were grown for 48 h followed by 24 to 72 h exposure to 0–28.8 μM TFV or vehicle, phosphate buffered saline (PBS). MTT (MTT, 3-(4,5-dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium Bromide) and Trypan blue indicated that TFV diminished cell viability at 24–72 h. TFV decreased ATP levels at 72 h when compared to vehicle, reflecting mitochondrial dysfunction. TFV increased the oxidative stress biomarkers of protein carbonylation and 4-hydroxynonenol (4-HNE) adduct formation. Tumor necrosis factor alpha (TNFα) was released into the media following exposure to 14.5 and 28.8 μM TFV. Caspase 3 and 9 cleavage was induced by TFV compared to vehicle at 72 h. These studies show that HK-2 cells are a sensitive model for TFV cytotoxicity and suggest that mitochondrial stress and apoptosis occur in HK-2 cells treated with TFV.
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Spinks CB, Zidan AS, Khan MA, Habib MJ, Faustino PJ. Pharmaceutical characterization of novel tenofovir liposomal formulations for enhanced oral drug delivery: in vitro pharmaceutics and Caco-2 permeability investigations. Clin Pharmacol 2017; 9:29-38. [PMID: 28260952 PMCID: PMC5327912 DOI: 10.2147/cpaa.s119875] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Tenofovir, currently marketed as the prodrug tenofovir disoproxil fumarate, is used clinically to treat patients with HIV/AIDS. The oral bioavailability of tenofovir is relatively low, limiting its clinical effectiveness. Encapsulation of tenofovir within modified long-circulating liposomes would deliver this hydrophilic anti-HIV drug to the reticuloendothelial system for better therapeutic efficacy. The objectives of the current study were to prepare and pharmaceutically characterize model liposomal tenofovir formulations in an attempt to improve their bioavailability. The entrapment process was performed using film hydration method, and the formulations were characterized in terms of encapsulation efficiency and Caco-2 permeability. An efficient reverse-phase high-performance liquid chromatography method was developed and validated for tenofovir quantitation in both in vitro liposomal formulations and Caco-2 permeability samples. Separation was achieved isocratically on a Waters Symmetry C8 column using 10 mM Na2PO4/acetonitrile pH 7.4 (95:5 v/v). The flow rate was 1 mL/min with a 12 min elution time. Injection volume was 10 µL with ultraviolet detection at 270 nm. The method was validated according to United States Pharmacopeial Convention category I requirements. The obtained result showed that tenofovir encapsulation within the prepared liposomes was dependent on the employed amount of the positive charge-imparting agent. The obtained results indicated that calibration curves were linear with r2 > 0.9995 over the analytical range of 1–10 µg/mL. Inter- and intraday accuracy and precision values ranged from 95% to 101% and 0.3% to 2.6%, respectively. The method was determined to be specific and robust. Regarding the potential of the prepared vectors to potentiate tenofovir permeability through the Caco-2 model, a 10-fold increase in tenofovir apparent permeability was observed compared to its oral solution. In conclusion, this novel and validated method was successfully applied to characterize both in vitro encapsulation efficiency and Caco-2 permeability transport for the pharmaceutical assessment of novel tenofovir formulations.
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Affiliation(s)
- Crystal B Spinks
- Department of Pharmaceutical Sciences, School of Pharmacy, Howard University, Washington, DC
| | - Ahmed S Zidan
- Division of Product Quality Research, Office of Pharmaceutical Quality, Food and Drug Administration, Silver Spring, MD, USA; Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Mansoor A Khan
- Irma Lerma Rangel College of Pharmacy, Texas A&M Health Science Center, College Station, TX, USA
| | - Muhammad J Habib
- Department of Pharmaceutical Sciences, School of Pharmacy, Howard University, Washington, DC
| | - Patrick J Faustino
- Division of Product Quality Research, Office of Pharmaceutical Quality, Food and Drug Administration, Silver Spring, MD, USA
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Assay development for determination of tenofovir in human plasma by solid phase analytical derivatization and LC-MS/MS. Bioanalysis 2015; 7:3085-95. [PMID: 26626536 DOI: 10.4155/bio.15.220] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND A novel method was developed and validated to measure tenofovir in human plasma. RESULTS/METHODOLOGY: This method employed solid phase analytical derivatization and analysis by LC-MS/MS. Stable-labeled internal standard was added to plasma samples followed by solid phase extraction. Retained analytes were derivatized on the solid phase extraction cartridges with a diazomethane solution to yield methyl-ester derivatives. Samples were analyzed using LC-MS/MS incorporating the use of a strong cation exchange column. The method was validated over a range of 5.00-750 ng/ml. The approach developed in this report for tenofovir could be applied to other analytes that share similar structural similarities. CONCLUSION The tenofovir LC-MS/MS method was used to support a clinical study of over 400 samples with a 100% success rate.
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Ravi P, Joseph S, Avula USR, Anthireddy S. A Simple Liquid Chromatographic Method for the Determination of Tenofovir in Rat Plasma and Its Application to Pharmacokinetic Studies. ACTA CHROMATOGR 2015. [DOI: 10.1556/achrom.27.2015.4.2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Heydari R, Shamsipur M. Enantiomeric Separation and Quantitation of Tenofovir Disoproxil Fumarate Using Amylose-Based Chiral Stationary Phases by High-Performance Liquid Chromatography. ACTA CHROMATOGR 2015. [DOI: 10.1556/achrom.27.2015.4.1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Development and validation of stability-indicating HPLC method for simeltaneous determination of Lamivudine, Tenofovir, and Dolutegravir in bulk and their tablet dosage form. FUTURE JOURNAL OF PHARMACEUTICAL SCIENCES 2015. [DOI: 10.1016/j.fjps.2015.11.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Reddy AVB, Jaafar J, Aris AB, Majid ZA, Umar K, Talib J, Madhavi G. Development and validation of a rapid ultra high performance liquid chromatography with tandem mass spectrometry method for the simultaneous determination of darunavir, ritonavir, and tenofovir in human plasma: Application to human pharmacokinetics. J Sep Sci 2015; 38:2580-7. [DOI: 10.1002/jssc.201500250] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Revised: 04/11/2015] [Accepted: 04/30/2015] [Indexed: 12/21/2022]
Affiliation(s)
| | - Jafariah Jaafar
- Department of Chemistry, Faculty of Science; Universiti Teknologi Malaysia; Johor Bahru Johor Malaysia
| | - Azmi Bin Aris
- Centre for Environmental Sustainability and Water Security (IPASA), Research Institute for Sustainable Environment; Universiti Teknologi Malaysia; Johor Bahru Johor Malaysia
- Department of Environmental Engineering, Faculty of Civil Engineering; Universiti Teknologi Malaysia; Johor Bahru Johor Malaysia
| | - Zaiton Abdul Majid
- Department of Chemistry, Faculty of Science; Universiti Teknologi Malaysia; Johor Bahru Johor Malaysia
| | - Khalid Umar
- Centre for Environmental Sustainability and Water Security (IPASA), Research Institute for Sustainable Environment; Universiti Teknologi Malaysia; Johor Bahru Johor Malaysia
- Department of Environmental Engineering, Faculty of Civil Engineering; Universiti Teknologi Malaysia; Johor Bahru Johor Malaysia
| | - Juhaizah Talib
- Centre for Environmental Sustainability and Water Security (IPASA), Research Institute for Sustainable Environment; Universiti Teknologi Malaysia; Johor Bahru Johor Malaysia
- Department of Environmental Engineering, Faculty of Civil Engineering; Universiti Teknologi Malaysia; Johor Bahru Johor Malaysia
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A LC-MS method to quantify tenofovir urinary concentrations in treated patients. J Pharm Biomed Anal 2015; 114:8-11. [PMID: 25997174 DOI: 10.1016/j.jpba.2015.05.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Revised: 04/24/2015] [Accepted: 05/01/2015] [Indexed: 11/21/2022]
Abstract
Tenofovir disoproxil fumarate is a prodrug of tenofovir used in the treatment of HIV and HBV infections: it is the most used antiretroviral worldwide. Tenofovir is nucleotidic HIV reverse trascriptase inhibitor that showed excellent long-term efficacy and tolerability. However renal and bone complications (proximal tubulopathy, hypophosphatemia, decreased bone mineral density, and reduced creatinine clearance) limit its use. Tenofovir renal toxicity has been suggested as the consequence of drug entrapment in proximal tubular cells: measuring tenofovir urinary concentrations may be a proxy of this event and it may be used as predictor of tenofovir side effects. No method is currently available for quantifying tenofovir in this matrix: then, the aim of this work was to validate a new LC-MS method for the quantification of urinary tenofovir. Chromatographic separation was achieved with a gradient (acetonitrile and water with formic acid 0.05%) on an Atlantis 5 μm T3, 4.6 mm × 150 mm, reversed phase analytical column. Detection of tenofovir and internal standard was achieved by electrospray ionization mass spectrometry in the positive ion mode. Calibration ranged from 391 to 100,000 ng/mL. The limit of quantification was 391 ng/mL and the limit of detection was 195 ng/mL. Mean recovery of tenofovir and internal standard were consistent and stable, while matrix effect resulted low and stable. The method was tested on 35 urine samples from HIV-positive patients treated with tenofovir-based HAARTs and did not show any significant interference with antiretrovirals or other concomitantly administered drugs. All the observed concentrations in real samples fitted the calibration range, confirming the capability of this method for the use in clinical routine. Whether confirmed in ad hoc studies this method may be used for quantifying tenofovir urinary concentrations and help managing HIV-positive patients treated with tenofovir.
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Anandgaonkar V, Gupta A, Kona S, Talluri MK. Isolation, LC–MS/MS and 2D-NMR characterization of alkaline degradants of tenofovir disoproxil fumarate. J Pharm Biomed Anal 2015; 107:175-85. [DOI: 10.1016/j.jpba.2014.12.034] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Revised: 12/19/2014] [Accepted: 12/20/2014] [Indexed: 11/26/2022]
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Purnima BV, Reddy TVB, Rao YS, Ramu G, Ramachandran D. Stability Indicating RP-UPLC Method for Assay of Emtricitabine and Tenofovir Disoproxil Fumarate in Bulk and Dosage Forms. ACTA ACUST UNITED AC 2015. [DOI: 10.4236/ajac.2015.610077] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Agrahari V, Putty S, Mathes C, Murowchick JB, Youan BBC. Evaluation of degradation kinetics and physicochemical stability of tenofovir. Drug Test Anal 2014; 7:207-13. [PMID: 24817173 DOI: 10.1002/dta.1656] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Revised: 02/13/2014] [Accepted: 03/11/2014] [Indexed: 11/07/2022]
Abstract
Tenofovir (TFV) has been proven to prevent the transmission of the Human Immunodeficiency Virus (HIV) through the vagina. But, there is little information available about its stability under various storage and stress conditions. Hence, this study aimed to investigate the degradation behavior and physicochemical stability of TFV using liquid chromatography coupled mass spectrometry (LC-MS) and solid state X-ray diffraction (XRD) analyses. The LC-MS analysis was performed on a QTrap mass spectrometer with an enhanced mass spectrum (EMS) scan in positive mode. A reversed phase C18 column was used as the stationary phase. TFV exhibited degradation under acidic and alkaline hydrolytic conditions. The degradation products with m/z 289.2 and 170 amu have been proposed as 6-Hydroxy adenine derivative of TFV, and (2-hydroxypropan-2-yloxy) methylphosphonic acid, respectively. A pseudo-first-order degradation kinetic allowed for estimating the shelf-life, half-life, and time required for 90% degradation of 3.84, 25.34, and 84.22 h in acidic conditions, and 58.26, 384.49, and 1277.75 h in alkaline conditions, respectively. No significant degradation was observed at pH 4.5 (normal cervicovaginal pH) and oxidative stress conditions of 3% and 30% v/v hydrogen peroxide solutions. The shelf life of TFV powder at room temperature was 23 months as calculated by using an Arrhenius plot. The XRD pattern showed that the drug was stable and maintained its original crystallinity under the accelerated and thermal stress conditions applied. Stability analyses revealed that the TFV was stable in various stress conditions; however, formulation strategies should be implemented to protect it in strong acidic and alkaline environments.
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Affiliation(s)
- Vivek Agrahari
- Laboratory of Future Nanomedicines and Theoretical Chronopharmaceutics, Division of Pharmaceutical Sciences, School of Pharmacy, University of Missouri-Kansas City, Kansas City, MO, 64108, USA
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Zhang C, Zhang T, Oyler NA, Youan BBC. Direct and Real-Time Quantification of Tenofovir Release from pH-Sensitive Microparticles into Simulated Biological Fluids Using 1H Nuclear Magnetic Resonance. J Pharm Sci 2014; 103:1170-1177. [DOI: 10.1002/jps.23886] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Koneru R, Olive MF, Tyor WR. Combined antiretroviral therapy reduces brain viral load and pathological features of HIV encephalitis in a mouse model. J Neurovirol 2014; 20:9-17. [PMID: 24415129 DOI: 10.1007/s13365-013-0223-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Revised: 11/22/2013] [Accepted: 11/27/2013] [Indexed: 12/18/2022]
Abstract
The role of brain HIV load in the pathogenesis of HIV-associated neurocognitive disorders (HAND) is unclear. To try and determine if the amount of HIV drives the severity of pathology, a severe combined immunodeficient (SCID) mouse model of HIV encephalitis (HIVE) was utilized to determine the effectiveness of a systemically administered combined antiretroviral (cART) regimen. SCID mice were inoculated intracerebrally with HIV-infected or uninfected (control) human macrophages and treated subcutaneously with cART or saline for 10 days. Immunohistochemistry was then used to examine gliosis and neuronal damage. Drug levels were measured in brain and plasma using high-performance liquid chromatography. Peak plasma and brain levels of atazanavir, tenofovir, and emtricitabine were determined to be 1 h post-injection of cART therapy. cART significantly reduced neuropathological features of HIVE, including astrogliosis and the presence of mononuclear phagocytes, and ameliorated reduced MAP2 (neuronal integrity) staining. However, cART did not eradicate HIV from the brain. Using this animal model of HIVE, these data indicate effective penetration of cART reduces brain viral loads and HIV pathology, possibly by eliminating the production of HIV proteins, virus infected cells, or both. Importantly, these data suggest that viral load directly affects the extent of pathology seen in the brain, particularly neuronal damage, which implies that more effective suppression of HIV in the CNS could reduce currently highly prevalent forms of HAND. However, these data also strongly suggest that cART will not eliminate HIV from the brain and that adjunctive therapies must be developed.
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Affiliation(s)
- Rajeth Koneru
- Atlanta VA Medical Center, 1670 Clairmont Rd., Decatur, GA, 30033, USA
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Medvedev YV, Ramenskaya GV, Shokhin IE, Yarushok TA. HPLC and UPLC for Determining Drugs in Blood (A Review). Pharm Chem J 2013. [DOI: 10.1007/s11094-013-0933-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Valluru RK, B PBR, S KS, V PK, Kilaru NB. High throughput LC–MS/MS method for simultaneous determination of tenofovir, lamivudine and nevirapine in human plasma. J Chromatogr B Analyt Technol Biomed Life Sci 2013; 931:117-26. [DOI: 10.1016/j.jchromb.2013.05.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Revised: 05/08/2013] [Accepted: 05/13/2013] [Indexed: 11/15/2022]
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Choudhari VP, Ingale S, Gite SR, Tajane DD, Modak VG, Ambekar A. Spectrophotometric simultaneous determination of Tenofovir disoproxil fumarate and Emtricitabine in combined tablet dosage form by ratio derivative, first order derivative and absorbance corrected methods and its application to dissolution study. Pharm Methods 2013; 2:47-52. [PMID: 23781430 PMCID: PMC3658029 DOI: 10.4103/2229-4708.81096] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Three simple, economical, precise, and accurate methods are described for the simultaneous determination of Tenofovir disoproxil fumarate (TE) and Emtricitabine (EM) in combined tablet dosage form. The first method is ratio derivative spectra, second is first-order derivative spectrophotometry and third is absorption corrected method. The amplitudes at 271.07 and 302.17 nm in the ratio derivative method, 224.38 and 306.88 nm in the first order derivative method were selected to determine Tenofovir disoproxil fumarate (TE) and Emtricitabine (EM), respectively, in combined formulation. Beer's law is obeyed in the concentration range of 3-21 μg/ml for TE and 2-14 μg/ml for EM for first two methods and range for third method was 6-30 μg/ml of TE and 4-20 μg/ml of EM. The percent assay for commercial formulation was found to be in the range 98.91%–101.72% for both the analytes by the proposed three methods. Absorption corrected method was successfully applied to carry out dissolution study of commercial tablet formulation by using USP II dissolution test apparatus. The methods were validated with respect to linearity, precision, and accuracy. Recoveries by proposed methods were found in the range of 99.06 %-101.34 % for both the analytes.
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Affiliation(s)
- Vishnu P Choudhari
- Pharmaceutical Analysis and Quality Assurance Department, MAEER'S Maharashtra Institute of Pharmacy, MIT Campus, Pune, Maharashtra, India
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Bhavsar DS, Patel BN, Patel CN. RP-HPLC method for simultaneous estimation of tenofovir disoproxil fumarate, lamivudine, and efavirenz in combined tablet dosage form. Pharm Methods 2013; 3:73-8. [PMID: 23781482 PMCID: PMC3658085 DOI: 10.4103/2229-4708.103876] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background: A simple, precise, accurate, and rapid reverse phase-high performance liquid chromatography (RP-HPLC) method with UV-Visible detector has been developed and subsequently validated for the simultaneous determination of tenofovir disoproxil fumarate (TDF), lamivudine (LAMI), and efavirenz (EFV) in their combined tablet dosage form. Materials and Methods: The separation was based on the use of a Kromasil C18 analytical column (150 × 4.6 mm, i.d., 5 μm). The mobile phase consisted of a mixture of 70 volumes of methanol and 30 volumes of 10 mM phosphate buffer (pH 5.0). The separation was carried out at 40°C temperature with a flow rate of 1 ml/min. Results: Quantitation was achieved with UV detection at 254 nm, with linear calibration curves at concentration ranges of 1–6 μg/ml for TDF and LAMI and 2–12 μg/ml for EFV. The recoveries obtained were 99.46–101.36% for LAMI, 99.57–101.42% for TDF, and 99.96–100.87 for EFV. Conclusion: The method was validated according to International conference of harmonisation guidelines in terms of accuracy, precision, specificity, robustness, limits of detection and quantitation, and other aspects of analytical validation.
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Affiliation(s)
- Dhara S Bhavsar
- Department of Quality Assurance, Shri Sarvajanik Pharmacy College, Mehsana, Gujarat, India
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Bhirud CH, Hiremath SN. Development of validated stability-indicating simultaneous estimation of Tenofovir disoproxil fumarate and emtricitabine in tablets by HPTLC. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.jopr.2013.02.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Kou H, Du X, Li Y, Fu Q, Zhu Z, Li T. Quantification of Tenofovir in Human Plasma by Solid-Phase Extraction and High-Performance Liquid Chromatography Coupled With UV Detection. Ther Drug Monit 2012; 34:593-8. [DOI: 10.1097/ftd.0b013e3182693687] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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28
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Havele S, Dhaneshwar SR. Stress studies of tenofovir disoproxil fumarate by HPTLC in bulk drug and pharmaceutical formulation. ScientificWorldJournal 2012; 2012:894136. [PMID: 22606065 PMCID: PMC3345998 DOI: 10.1100/2012/894136] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2011] [Accepted: 10/24/2011] [Indexed: 01/14/2023] Open
Abstract
A stability-indicating high-performance thin-layer chromatographic (HPTLC) method for determination of tenofovir disoproxil fumarate in bulk drug and in tablet has been developed and validated. The mobile phase selected was chloroform : methanol (9.0 : 1.0, v/v) with ultraviolet (UV) detection at 260 nm. The retention factor was found to be 0.49 ± 0.03 with correlation coefficients of 0.9994 in the range 300–1500 ng/spot and with an accuracy of 99.25%. Method had the potential to determine tenofovir disoproxil fumarate from tablet without any interference, and it was a stability-indicating one.
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Affiliation(s)
- Shweta Havele
- Research and Development Centre in Pharmaceutical Sciences and Applied Chemistry, Poona College of Pharmacy, Bharati Vidyapeeth University, Erandwane, Pune, India
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Agrahari V, Youan BBC. Sensitive and rapid HPLC quantification of tenofovir from hyaluronic acid-based nanomedicine. AAPS PharmSciTech 2012; 13:202-10. [PMID: 22215290 DOI: 10.1208/s12249-011-9735-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2011] [Accepted: 11/21/2011] [Indexed: 11/30/2022] Open
Abstract
The purpose of this study was to develop and validate a rapid, sensitive, and specific reversed-phase high-performance liquid chromatography method for the quantitative determination of native tenofovir (TNF) for various applications. Different analytical performance parameters such as linearity, precision, accuracy, limit of quantification (LOQ), limit of detection (LOD), and robustness were determined according to International Conference on Harmonization (ICH) guidelines. A Bridge™ C18 column (150 × 4.6 mm, 5 μm) was used as stationary phase. The retention time of TNF was 1.54 ± 0.03 min (n = 6). The assay was linear over the concentration range of 0.1-10 μg/mL. The proposed method was sensitive with LOD and LOQ values equal to 50 and 100 ng/mL, respectively. The method was accurate with percent mean recovery from 95.41% to 102.90% and precise as percent RSD (relative standard deviation) values for intra-day, and inter-day precision were less than 2%. This method was utilized for the estimation of molar absorptivity of TNF at 259 nm (ε(259) = 12,518 L/mol/cm), calculated from linear regression analysis. The method was applied for determination of percentage of encapsulation efficiency (22.93 ± 0.04%), drug loading (12.25 ± 1.03%), in vitro drug release profile in the presence of enzyme (43% release in the first 3 h) and purification analysis of hyaluronic acid-based nanomedicine.
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Matta MK, Burugula L, Pilli NR, Inamadugu JK, JVLN SR. A novel LC-MS/MS method for simultaneous quantification of tenofovir and lamivudine in human plasma and its application to a pharmacokinetic study. Biomed Chromatogr 2012; 26:1202-9. [DOI: 10.1002/bmc.2679] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2011] [Revised: 11/17/2011] [Accepted: 11/17/2011] [Indexed: 11/08/2022]
Affiliation(s)
- Murali Krishna Matta
- University College of Pharmaceutical Sciences; Jawaharlal Nehru Technological University; Kukatpally; Hyderabad-500 085; India
| | - Laxminarayana Burugula
- University College of Pharmaceutical Sciences; Jawaharlal Nehru Technological University; Kukatpally; Hyderabad-500 085; India
| | - Nageswara Rao Pilli
- University College of Pharmaceutical Sciences; Jawaharlal Nehru Technological University; Kukatpally; Hyderabad-500 085; India
| | - Jaswanth Kumar Inamadugu
- Analytical and Environmental Chemistry Division; Sri Venkateswara University; Tirupati-517 502; India
| | - Seshagiri Rao JVLN
- College of Pharmaceutical Sciences; Andhra University; Visakapatnam-530 003; India
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Sharma R, Mehta K. Simultaneous spectrophotometric estimation of tenofovir disoproxil fumarate and Lamivudine in three component tablet formulation containing efavirenz. Indian J Pharm Sci 2011; 72:527-30. [PMID: 21218073 PMCID: PMC3013570 DOI: 10.4103/0250-474x.73926] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2009] [Revised: 03/26/2010] [Accepted: 08/19/2010] [Indexed: 11/04/2022] Open
Abstract
Three UV spectrophotometric methods have been developed, simultaneous equation method, multicomponent analysis (II) and derivative spectroscopy method (III). The absorption maxima of the drugs were found to be 247, 259 and 272 nm, respectively for efavirenz, tenofovir disoproxil fumarate and lamivudine in methanol:water (50:50) solvent system. Efavirenz, tenofovir disoproxil fumarate and lamivudine obeyed Beer's law in the concentration range of 10-60, 5-30 and 5-30 μg/ml, respectively. Results of analysis for all the three methods were analyzed and validated for various parameters according to ICH guidelines.
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Affiliation(s)
- R Sharma
- School of Pharmacy, Devi Ahilya University, Takshshila Campus, Khandwa Road, Indore-452 001, India
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Meesters RJW, van Kampen JJA, Scheuer RD, van der Ende ME, Gruters RA, Luider TM. Determination of the antiretroviral drug tenofovir in plasma from HIV-infected adults by ultrafast isotope dilution MALDI-triple quadrupole tandem mass spectrometry. JOURNAL OF MASS SPECTROMETRY : JMS 2011; 46:282-289. [PMID: 21394844 DOI: 10.1002/jms.1897] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A new and reliable mass spectrometric method using an isotope dilution method in combination with matrix-assisted laser desorption/ionization-triple quadrupole tandem mass spectrometry (ID-MALDI-QqQ-MS/MS) has been developed and validated for the determination of concentrations of the antiretroviral drug tenofovir (TNV) in plasma from HIV-infected adults. The advantage of this new method is that (1) the method is ultrafast and (2) can be applied for high-throughput measurement of TNV in plasma. The method is based on a simple plasma deproteinization step in combination with the use of [adenine-(13) C(5) ]-TNV as the internal standard. TNV and [adenine-(13) C(5) ]-TNV were monitored by multiple reaction monitoring using the transition m/z 288.0 → 176.2 and m/z 293.2 → 181.2 for TNV and [adenine-(13) C(5) ]-TNV, respectively. The method was validated according to the most recent FDA guidelines for the development and validation of (new) bio-analytical assays. Validated method parameters were: linearity, accuracy, precision and stability of the method. The lowest limit of quantification was 0.10 µmol/l, whereas the limit of detection determined at a signal-to-noise ratio (S/N = 3:1) in pooled drug free human control plasma was 0.04 µmol/l. The validated method was successfully applied and tested for its clinical feasibility by the analysis of plasma samples from selected HIV-infected adults receiving the prodrug tenofovir disoproxil fumarate. Observed plasma TNV concentrations ranged between 0.11 and 0.76 µmol/l and measured plasma TNV concentrations were within the therapeutically relevant concentration range.
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Affiliation(s)
- Roland J W Meesters
- Laboratory of Neuro-Oncology and Clinical and Cancer Proteomics, Department of Neurology, University Medical Center Rotterdam, Dr. Molewaterplein 50, 3015 GE Rotterdam, The Netherlands.
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LC Assay for a HIV Tablet Containing Emtricitabine, Tenofovir Disoproxil Fumarate and Rilpivirine. Chromatographia 2011. [DOI: 10.1007/s10337-010-1906-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Choi SO, Rezk N, Kim JS, Kashuba ADM. Development of an LC-MS method for measuring TNF in human vaginal tissue. J Chromatogr Sci 2010; 48:219-23. [PMID: 20223089 DOI: 10.1093/chromsci/48.3.219] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
A sensitive, accurate, and precise liquid chromatography-mass spectrometry assay for the determination of tenofovir (TNF) in human vaginal tissue was developed and validated. After homogenization of the tissue, solid-phase extraction on Varian Bond Elut-C(18) column was used for sample clean up. Chromatographic separation of TNF and the internal standard (tolbutamide) was achieved with a Varian Polaris 3C(18)-A reversed-phase analytical column (150 mm x 2 mm). A gradient method using 0.1% formic acid in water and 0.1% formic acid in acetonitrile was employed. Detection of TNF and tolbutamide was achieved by electrospray ionization mass spectrometry in the positive ion mode using 288.05 and 271.00 m/z, respectively. Linear TNF calibration curves were obtained between 1-1,000 ng/mL with a correlation coefficient (r(2)) greater than 0.999. Intra- and inter-day accuracy for TNF ranged from 89.7% and 109.4% and from 97.3% and 104.9%, and precision ranged from 1.3% and 10.9% and 2.6% and 9.0%, respectively. This is the first validated method developed to quantitate TNF in human tissues.
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Affiliation(s)
- S O Choi
- Korea Food and Drug Administration, Department of Pharmacology.
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35
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Müller DM, Rentsch KM. Therapeutic drug monitoring by LC–MS–MS with special focus on anti-infective drugs. Anal Bioanal Chem 2010; 398:2573-94. [DOI: 10.1007/s00216-010-3986-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2010] [Revised: 06/27/2010] [Accepted: 06/29/2010] [Indexed: 10/19/2022]
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Ashenafi D, Chintam V, van Veghel D, Dragovic S, Hoogmartens J, Adams E. Development of a validated liquid chromatographic method for the determination of related substances and assay of tenofovir disoproxil fumarate. J Sep Sci 2010; 33:1708-16. [DOI: 10.1002/jssc.201000039] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Abstract
OBJECTIVE An effective vaginal microbicide against sexual HIV transmission remains elusive, with requirements for adherence to appropriate application of effective, nontoxic products being a major deterrent. We explored methods to enable sustained release of combinations of antiretroviral microbicides, utilizing intravaginal rings composed of biosoluble Acacia gum or nonbiodegradable hydrogel of 2-hydroxyethyl methacrylate and sodium methacrylate, materials approved for use by the US Food and Drug Administration. DESIGN AND METHODS The reverse transcriptase inhibitors TMC120, PMPA, 3'-azido-3'-deoxythymidine, and a newly characterized anti-HIV agent, Boc-lysinated betulonic acid, were incorporated into vaginal rings with different combinations. Daily and cumulative release rates of these inhibitors in ring eluates were determined by high-performance liquid chromatography, gas chromatography, or immunoassay. Anti-HIV effects were measured by assessment of p24 Gag antigen in T-cell cultures exposed to HIV-1 isolates. RESULTS Drug release rates were sustained at concentrations higher than the minimum effective dose for HIV inhibition. The release was maintained for no less than 15 and 28 days from the Acacia gum and 2-hydroxyethyl methacrylate and sodium methacrylate rings, respectively. Boc-lysinated betulonic acid showed more than 90% inhibition of HIV-1 infection in H9 cells, with little toxicity to normal cells. CONCLUSION The intravaginal rings described here are capable of efficacious drug delivery. Incorporation of several antiretroviral agents, including betulinol derivatives, which act at multiple levels of the HIV life cycle, may provide a synergistic effect to achieve higher efficacy on the inhibition of HIV infection.
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Gomes NA, Vaidya VV, Pudage A, Joshi SS, Parekh SA. Liquid chromatography–tandem mass spectrometry (LC–MS/MS) method for simultaneous determination of tenofovir and emtricitabine in human plasma and its application to a bioequivalence study. J Pharm Biomed Anal 2008; 48:918-26. [DOI: 10.1016/j.jpba.2008.07.022] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2008] [Revised: 07/23/2008] [Accepted: 07/23/2008] [Indexed: 10/21/2022]
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Kandagal PB, Manjunatha DH, Seetharamappa J, Kalanur SS. RP‐HPLC Method for the Determination of Tenofovir in Pharmaceutical Formulations and Spiked Human Plasma. ANAL LETT 2008. [DOI: 10.1080/00032710801910742] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Seshachalam U, Rajababu B, Haribabu B, Chandrasekhar KB. Enantiomeric Separation of Tenofovir on an Achiral C18 Column by HPLC Using L‐Phenylalanine as a Chiral Mobile Phase Additive. J LIQ CHROMATOGR R T 2007. [DOI: 10.1080/10826070701780789] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- U. Seshachalam
- a Quality Assurance, Matrix Laboratories Limited , Secunderabad, Andhra Pradesh, India
| | - B. Rajababu
- b Process Research Laboratory , Matrix Laboratories Limited , Secunderabad, Andhra Pradesh, India
| | - B. Haribabu
- c API Technical services , Matrix Laboratories Limited , Secunderabad, Andhra Pradesh, India
| | - K. B. Chandrasekhar
- d Department of Chemistry , JNTU College of Engineering , Ananthapur, Andhra Pradesh, India
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El Barkil M, Gagnieu MC, Guitton J. Relevance of a combined UV and single mass spectrometry detection for the determination of tenofovir in human plasma by HPLC in therapeutic drug monitoring. J Chromatogr B Analyt Technol Biomed Life Sci 2007; 854:192-7. [PMID: 17499565 DOI: 10.1016/j.jchromb.2007.04.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2006] [Revised: 02/20/2007] [Accepted: 04/15/2007] [Indexed: 01/08/2023]
Abstract
A sensitive high-performance liquid chromatography method coupled to UV and single mass spectrometry (MS) detection was developed for the determination of tenofovir in human plasma. A solid phase extraction procedure (Bond-Elut C18 Varian cartridges) provided high extraction efficiency (91% for tenofovir and 68.8% for the internal standard, 3-methylcytidine). An atlantis-dC-18 analytical column is used with an isocratic mode elution of a mixture (pH 2.5) of ammonium acetate/methanol (98.5:1.5, v/v). Detection was performed at 260 nm and by using the ion at m/z 288. The signals from both detectors were validated over the range of 10-1000 ng mL(-1) and were found to be linear, accurate and precise. At the lowest limit of quantification, 10 ng mL(-1) for UV and 5 ng mL(-1) for MS, the average coefficient of variation was 6.9 and 3.9%, respectively. To investigate the potential of the validated method for clinical studies, more than 170 samples from HIV-infected adult patients were then analyzed with this assay. A good correlation was observed between the results obtained with both detectors. However, in several cases discordant results were observed between UV and MS detections. Therefore, tenofovir can sometimes suffer from interferences using either UV or single MS detection. We concluded that the double detection allows to obtain a more specific quantification of tenofovir. The present assay is sound and can be used for therapeutic drug monitoring allowing a higher reliability of the results which are transmitted to the medical team.
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Affiliation(s)
- Mirna El Barkil
- Hospices Civils de Lyon, Laboratoire de pharmacologie, Hôpital E. Herriot, 5 Place d'Arsonval, 69437 Lyon, France
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Abstract
Tenofovir disoproxil fumarate is a nucleotide reverse transcriptase inhibitor with activity against both HIV and the hepatitis B virus. It has had minimal nephrotoxic effects in early clinical trials, but as clinical use has widened, case reports describing tenofovir-induced renal tubular damage, Fanconi's syndrome and diabetes insipidus have been described. The authors review the pharmacokinetics, mechanism of action and clinical uses of tenofovir disoproxil fumarate. The large clinical trials, as well as the case reports of tenofovir-induced kidney injury, are also reviewed. The potential mechanism of renal damage is discussed and recommendations for evaluation and treatment of tenofovir-induced kidney injury are given.
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Affiliation(s)
- Michael D Gitman
- North Shore University Hospital, Division of Nephrology and Hypertension, Manhasset, NY, USA
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Takahashi M, Kudaka Y, Okumura N, Hirano A, Banno K, Kaneda T. Determination of Plasma Tenofovir Concentrations Using a Conventional LC-MS Method. Biol Pharm Bull 2007; 30:1784-6. [PMID: 17827740 DOI: 10.1248/bpb.30.1784] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The quantification of tenofovir, a nucleoside reverse transcriptase inhibitor prescribed once daily, in human plasma is important due to a recent increase in its use. HPLC, however, can not easily detect and quantify tenofovir because of interfering peaks. Therefore, we developed a rapid and conventional LC-MS method, validated by estimating the precision and accuracy for inter- and intraday analysis in the concentration range of 0.019-1.567 microg/ml. The calibration curve was linear in the described concentration range. Average accuracy ranged from 95.9 to 100.7%. Relative standard deviations of both inter- and intraday assays were less than 11.6%. Recovery of tenofovir was more than 80.2%. This novel method provides a conventional, accurate and precise way to determine tenofovir in human plasma samples.
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Affiliation(s)
- Masaaki Takahashi
- Department of Pharmacy, National Hospital Organization Nagoya Medical Center (Tokai Area Central Hospital for AIDS Treatment and Research), Naka-ku, Nagoya, Aichi 460-0001, Japan
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Bennetto-Hood C, Long MC, Acosta EP. Development of a sensitive and specific liquid chromatography/mass spectrometry method for the determination of tenofovir in human plasma. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2007; 21:2087-94. [PMID: 17546653 DOI: 10.1002/rcm.3056] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
A sensitive and specific method for the quantitation of tenofovir (TFV) in human plasma by liquid chromatography/electrospray ionization mass spectrometry was developed and validated. Plasma samples were prepared by solid-phase extraction performed on Waters Oasis cation-exchange cartridges (30 mg). Chromatographic separation was performed isocratically on a reversed-phase Waters Atlantis dC18 column (2.0x100 mm, 3 microm). The mobile phase consisted of a hydroxylamine/acetic acid buffer (pH 6.75) and methanol (93:7, v/v). The acquisition was performed in selected ion monitoring mode for the protonated molecular ions [M+H]+ of m/z 288.2 for TFV and 212.2 for the internal standard, zalcitibine. The method was fully validated to determine its specificity, recovery, linearity and sensitivity, accuracy and precision. The analytical range was set at 1-750 ng/mL using a 200 microL plasma sample, with a mean coefficient of determination (r2) of 0.9969. The mean accuracies for the calibration standards ranged from -5.0 to 4.3%, while the precisions were within 1.2 and 6.4%. Intra-assay and inter-assay mean accuracies for three quality control concentrations (2, 60, and 600 ng/mL) ranged from -6.1 to 10.7%, while the precisions were within 1.3 and 9.1%. TFV was shown to be stable under normal storage and assay conditions; no degradation was seen when stored at -20 degrees C or -80 degrees C for up to 6 months, and after 16 h at room temperature in the injection matrix. The present method provides an accurate, precise, and sensitive tool for TFV quantitation and was successfully applied to an external proficiency-testing program and pharmacokinetic analysis.
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Affiliation(s)
- Chantelle Bennetto-Hood
- The University of Alabama at Birmingham School of Medicine, Division of Clinical Pharmacology, Birmingham, Alabama 35294-0019, USA
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Rezk NL, Crutchley RD, Kashuba ADM. Simultaneous quantification of emtricitabine and tenofovir in human plasma using high-performance liquid chromatography after solid phase extraction. J Chromatogr B Analyt Technol Biomed Life Sci 2005; 822:201-8. [PMID: 16005269 DOI: 10.1016/j.jchromb.2005.06.019] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2005] [Revised: 06/02/2005] [Accepted: 06/02/2005] [Indexed: 11/20/2022]
Abstract
An accurate, sensitive and simple reverse-phase (RP) high-performance liquid chromatography (HPLC) assay for the simultaneous quantitative determination of emtricitabine and tenofovir in human blood plasma is described. Using 200 microL of plasma and BOND ELUT-C18 Varian columns, the solid phase extraction (SPE) method results in a clean baseline and high extraction efficiencies (100% for emtricitabine and 98.6% for tenofovir). An Atlantistrade mark dC-18 analytical column is used along with an 18 min linear gradient elution of phosphate buffer (pH 5.7) and methanol to provide sharp peaks for emtricitabine at 280 nm, tenofovir at 259 nm, and the internal standard 2',3'didoxyuridine (DDU) at 262 nm. The method was validated over the range of 10-10,000 ng/mL for both analytes, and is accurate (average accuracies of three different concentrations ranged from 98 to 105% for emtricitabine and 97 to 103% for tenofovir) and precise (within- and between-day precision ranged from 1.7 to 3.7% and 3.7 to 5.2%, respectively). This method is suitable for use in clinical pharmacokinetic studies and is nimble enough for therapeutic drug monitoring.
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Affiliation(s)
- Naser L Rezk
- Clinical Pharmacology/Analytical Chemistry Core, Center for AIDS Research, 3320 Kerr Hall, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
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