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Fabbiani M, Gagliardini R, Ciccarelli N, Quiros Roldan E, Latini A, d'Ettorre G, Antinori A, Castagna A, Orofino G, Francisci D, Chinello P, Madeddu G, Grima P, Rusconi S, Del Pin B, Lombardi F, D'Avino A, Focà E, Colafigli M, Cauda R, Di Giambenedetto S, De Luca A. Atazanavir/ritonavir with lamivudine as maintenance therapy in virologically suppressed HIV-infected patients: 96 week outcomes of a randomized trial. J Antimicrob Chemother 2019; 73:1955-1964. [PMID: 29668978 DOI: 10.1093/jac/dky123] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2017] [Accepted: 03/10/2018] [Indexed: 11/14/2022] Open
Abstract
Objectives To investigate the long-term safety and efficacy of a treatment switch to dual ART with atazanavir/ritonavir + lamivudine versus continuing a standard regimen with atazanavir/ritonavir + 2NRTI in virologically suppressed patients. Methods ATLAS-M is a 96 week open-label, randomized, non-inferiority (margin -12%) trial enrolling HIV-infected adults on atazanavir/ritonavir + 2NRTI, with stable HIV-RNA <50 copies/mL and CD4 counts >200 cells/mm3. At baseline, patients were randomized 1:1 to switch to atazanavir/ritonavir + lamivudine or to continue the previous regimen. Here, we report the 96 week efficacy and safety data. The study was registered with ClinicalTrials.gov, number NCT01599364. Results Overall, 266 subjects were enrolled (133 in each arm). At 96 weeks, in the ITT population, patients free of treatment failure totalled 103 (77.4%) with atazanavir/ritonavir + lamivudine and 87 (65.4%) with triple therapy (difference +12.0%, 95% CI +1.2/+22.8, P = 0.030), demonstrating the superiority of dual therapy. Two (1.5%) and 9 (6.8%) virological failures occurred in the dual-therapy arm and the triple-therapy arm, respectively, without development of resistance to any study drug. Clinical adverse events occurred at similar rates in both arms. A higher frequency of grade 3-4 hyperbilirubinemia (66.9% versus 50.4%, P = 0.006) and hypertriglyceridaemia (6.8% versus 1.5%, P = 0.031) occurred with dual therapy, although this never led to treatment discontinuation. A significant improvement in renal function and lumbar spine bone mineral density occurred in the dual-therapy arm. The evolution of CD4, HIV-DNA levels and neurocognitive performance was similar in both arms. Conclusions In this randomized study, a treatment switch to atazanavir/ritonavir + lamivudine was superior over the continuation of atazanavir/ritonavir + 2NRTI in virologically suppressed patients, with a sustained benefit in terms of improved renal function and bone mineral density.
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Affiliation(s)
- Massimiliano Fabbiani
- Department of Infectious Diseases, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
| | - Roberta Gagliardini
- Institute of Clinical Infectious Diseases, Catholic University of Sacred Heart, Rome, Italy.,Infectious Diseases Unit, Siena University Hospital and Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Nicoletta Ciccarelli
- Institute of Clinical Infectious Diseases, Catholic University of Sacred Heart, Rome, Italy
| | - Eugenia Quiros Roldan
- University Division of Infectious and Tropical Diseases, University of Brescia, Brescia, Italy
| | - Alessandra Latini
- Infectious Dermatology and Allergology Unit, IFO S. Gallicano Institute (IRCCS), Rome, Italy
| | | | - Andrea Antinori
- National Institute for Infectious Diseases 'Lazzaro Spallanzani' IRCCS, Rome, Italy
| | - Antonella Castagna
- Department of Infectious and Tropical Diseases, Vita-Salute San Raffaele University, San Raffaele Hospital, Milan, Italy
| | - Giancarlo Orofino
- Infectious and Tropical Diseases Unit, Amedeo di Savoia Hospital, Turin, Italy
| | | | - Pierangelo Chinello
- Systemic Infections and Immunodeficiency Unit, National Institute for Infectious Diseases 'Lazzaro Spallanzani' IRCCS, Rome, Italy
| | - Giordano Madeddu
- Department of Clinical and Experimental Medicine, University of Sassari, Sassari, Italy
| | - Pierfrancesco Grima
- Division of Infectious Diseases, 'S. Caterina Novella' Hospital, Galatina, Italy
| | - Stefano Rusconi
- Infectious Disease Unit, DIBIC Luigi Sacco, University of Milan, Milan, Italy
| | - Barbara Del Pin
- Unit of Infectious Diseases, S.M. Annunziata Hospital, Florence, Italy
| | - Francesca Lombardi
- Institute of Clinical Infectious Diseases, Catholic University of Sacred Heart, Rome, Italy
| | - Alessandro D'Avino
- Institute of Clinical Infectious Diseases, Catholic University of Sacred Heart, Rome, Italy
| | - Emanuele Focà
- University Division of Infectious and Tropical Diseases, University of Brescia, Brescia, Italy
| | - Manuela Colafigli
- Infectious Dermatology and Allergology Unit, IFO S. Gallicano Institute (IRCCS), Rome, Italy
| | - Roberto Cauda
- Institute of Clinical Infectious Diseases, Catholic University of Sacred Heart, Rome, Italy
| | | | - Andrea De Luca
- Infectious Diseases Unit, Siena University Hospital and Department of Medical Biotechnologies, University of Siena, Siena, Italy
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Di Giambenedetto S, Fabbiani M, Quiros Roldan E, Latini A, D'Ettorre G, Antinori A, Castagna A, Orofino G, Francisci D, Chinello P, Madeddu G, Grima P, Rusconi S, Di Pietro M, Mondi A, Ciccarelli N, Borghetti A, Focà E, Colafigli M, De Luca A, Cauda R. Treatment simplification to atazanavir/ritonavir + lamivudine versus maintenance of atazanavir/ritonavir + two NRTIs in virologically suppressed HIV-1-infected patients: 48 week results from a randomized trial (ATLAS-M). J Antimicrob Chemother 2017; 72:1163-1171. [PMID: 28093483 DOI: 10.1093/jac/dkw557] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2016] [Accepted: 11/27/2016] [Indexed: 11/14/2022] Open
Abstract
Background Combination ART (cART)-related toxicities and costs have prompted the need for treatment simplification. The ATLAS-M trial explored 48 week non-inferior efficacy of simplification to atazanavir/ritonavir + lamivudine versus maintaining three-drug atazanavir/ritonavir-based cART in virologically suppressed patients. Methods We performed an open-label, multicentre, randomized, non-inferiority study, enrolling HIV-infected adults on atazanavir/ritonavir + two NRTIs, with stable HIV-RNA <50 copies/mL and CD4 + >200 cells/mm 3 . Main exclusion criteria were hepatitis B virus coinfection, past virological failure on or resistance to study drugs, recent AIDS and pregnancy. Patients were randomly assigned 1:1 to either switch to 300 mg of atazanavir/100 mg of ritonavir once daily and 300 mg of lamivudine once daily (atazanavir/ritonavir + lamivudine arm) or to continue the previous regimen (atazanavir/ritonavir + two NRTIs arm). The primary study outcome was the maintenance of HIV-RNA <50 copies/mL at week 48 of the ITT-exposed (ITT-e) analysis with switch = failure. The non-inferiority margin was 12%. This study is registered at ClinicalTrials.gov, number NCT01599364. Results Between July 2011 and June 2014, 266 patients were randomized (133 to each arm). After 48 weeks, the primary study outcome was met by 119 of 133 patients (89.5%) in the atazanavir/ritonavir + lamivudine arm and 106 of 133 patients (79.7%) in the atazanavir/ritonavir + two NRTIs arm [difference atazanavir/ritonavir + lamivudine versus atazanavir/ritonavir + two NRTIs arm: +9.8% (95% CI + 1.2 to + 18.4)], demonstrating non-inferiority and superior efficacy of the atazanavir/ritonavir + lamivudine arm. Virological failure occurred in two (1.5%) patients in the atazanavir/ritonavir + lamivudine arm and six (4.5%) patients in the atazanavir/ritonavir + two NRTIs arm, without resistance selection. A similar proportion of adverse events occurred in both arms. Conclusions Treatment simplification to atazanavir/ritonavir + lamivudine showed non-inferior efficacy (superiority on post-hoc analysis) and a comparable safety profile over continuing atazanavir/ritonavir + two NRTIs in virologically suppressed patients.
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Affiliation(s)
| | - Massimiliano Fabbiani
- Institute of Clinical Infectious Diseases, Catholic University of Sacred Heart, Rome, Italy
| | - Eugenia Quiros Roldan
- University Division of Infectious and Tropical Diseases, University of Brescia, Brescia, Italy
| | - Alessandra Latini
- Infectious Dermatology and Allergology Unit, IFO S. Gallicano Institute (IRCCS), Rome, Italy
| | | | - Andrea Antinori
- National Institute for Infectious Diseases 'Lazzaro Spallanzani' IRCCS, Rome, Italy
| | - Antonella Castagna
- Department of Infectious and Tropical Diseases, Vita-Salute San Raffaele University, San Raffaele Hospital, Milan, Italy
| | - Giancarlo Orofino
- Infectious and Tropical Diseases Unit, Amedeo di Savoia Hospital, Torino, Italy
| | | | - Pierangelo Chinello
- Systemic Infections and Immunodeficiency Unit, National Institute for Infectious Diseases 'Lazzaro Spallanzani' IRCCS, Rome, Italy
| | - Giordano Madeddu
- Department of Clinical and Experimental Medicine, University of Sassari, Sassari, Italy
| | | | - Stefano Rusconi
- Infectious Diseases Unit, DIBIC Luigi Sacco, University of Milan, Milan, Italy
| | - Massimo Di Pietro
- Unit of Infectious Diseases, S.M. Annunziata Hospital, Florence, Italy
| | - Annalisa Mondi
- Institute of Clinical Infectious Diseases, Catholic University of Sacred Heart, Rome, Italy
| | - Nicoletta Ciccarelli
- Institute of Clinical Infectious Diseases, Catholic University of Sacred Heart, Rome, Italy
| | - Alberto Borghetti
- Institute of Clinical Infectious Diseases, Catholic University of Sacred Heart, Rome, Italy
| | - Emanuele Focà
- University Division of Infectious and Tropical Diseases, University of Brescia, Brescia, Italy
| | - Manuela Colafigli
- Infectious Dermatology and Allergology Unit, IFO S. Gallicano Institute (IRCCS), Rome, Italy
| | - Andrea De Luca
- UOC Malattie Infettive, Azienda Ospedaliera Universitaria Senese, Siena, Italy.,Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Roberto Cauda
- Institute of Clinical Infectious Diseases, Catholic University of Sacred Heart, Rome, Italy
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Punyawudho B, Singkham N, Thammajaruk N, Dalodom T, Kerr SJ, Burger DM, Ruxrungtham K. Therapeutic drug monitoring of antiretroviral drugs in HIV-infected patients. Expert Rev Clin Pharmacol 2016; 9:1583-1595. [PMID: 27626677 DOI: 10.1080/17512433.2016.1235972] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
INTRODUCTION Therapeutic drug monitoring (TDM) may be beneficial when applied to antiretroviral (ARV). Even though TDM can be a valuable strategy in HIV management, its role remains controversial. Areas covered: This review provides a comprehensive update on important issues relating to TDM of ARV drugs in HIV-infected patients. Articles from PubMed with keywords relevant to each topic section were reviewed. Search strategies limited to articles published in English. Expert commentary: There is evidence supporting the use of TDM in HIV treatment. However, some limitations need to be considered. The evidence supporting the use of routine TDM for all patients is limited, as it is not clear that this strategy offers any advantages over TDM for selected indications. Selected groups of patients including patients with physiological changes, patients with drug-drug interactions or toxicity, and the elderly could potentially benefit from TDM, as optimized dosing is challenging in these populations.
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Affiliation(s)
- Baralee Punyawudho
- a Department of Pharmaceutical Care, Faculty of Pharmacy , Chiang Mai University , Chiang Mai , Thailand
| | - Noppaket Singkham
- a Department of Pharmaceutical Care, Faculty of Pharmacy , Chiang Mai University , Chiang Mai , Thailand
| | | | - Theera Dalodom
- b HIV-NAT , Thai Red Cross AIDS Research Centre , Bangkok , Thailand
| | - Stephen J Kerr
- b HIV-NAT , Thai Red Cross AIDS Research Centre , Bangkok , Thailand.,c The Kirby Institute, University of New South Wales , Sydney , Australia.,d Department of Global Health, Academic Medical Center , University of Amsterdam, Amsterdam Institute for Global Health and Development , Amsterdam , The Netherlands
| | - David M Burger
- e Radbound University Medical Center , Nijmegen , The Netherlands
| | - Kiat Ruxrungtham
- b HIV-NAT , Thai Red Cross AIDS Research Centre , Bangkok , Thailand.,f Faculty of Medicine , Chulalongkorn University , Bangkok , Thailand
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Tsai MS, Chang SY, Lin SW, Kuo CH, Sun HY, Wu BR, Tang SY, Liu WC, Su YC, Hung CC, Chang SC. Treatment response to unboosted atazanavir in combination with tenofovir disoproxil fumarate and lamivudine in human immunodeficiency virus-1-infected patients who have achieved virological suppression: A therapeutic drug monitoring and pharmacogenetic study. JOURNAL OF MICROBIOLOGY, IMMUNOLOGY, AND INFECTION = WEI MIAN YU GAN RAN ZA ZHI 2016; 50:789-797. [PMID: 26857335 DOI: 10.1016/j.jmii.2015.12.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Accepted: 12/20/2015] [Indexed: 12/12/2022]
Abstract
BACKGROUND/PURPOSE Treatment response to switch regimens containing unboosted atazanavir and tenofovir disoproxil fumarate (TDF)/lamivudine guided by therapeutic drug monitoring in human immunodeficiency virus-infected patients is rarely investigated. METHODS Consecutive patients with plasma human immunodeficiency virus RNA load < 200 copies/mL switching to unboosted atazanavir plus zidovudine-lamivudine (coformulated), abacavir-lamivudine (coformulated), or TDF/lamivudine > 3 months were included for determinations of treatment response, plasma atazanavir concentrations, and single-nucleotide polymorphisms of MDR1, PXR, and UGT1A1 genes from 2010 to 2014. Treatment failure was defined as either discontinuation of atazanavir for any reason or plasma viral load ≥ 200 copies/mL within 96 weeks. RESULTS During the study period, 128 patients switched to unboosted atazanavir with TDF/lamivudine (TDF group) and 186 patients switched to unboosted atazanavir with two other nucleoside reverse-transcriptase inhibitors (non-TDF group). There were no statistically significant differences in the distributions of single-nucleotide polymorphisms of MDR1 (2677 and 3435), PXR genotypes (63396), and UGT1A1*28 between the two groups. Recommended plasma atazanavir concentrations were achieved in 83.5% and 64.9% of the TDF group and non-TDF group, respectively (p < 0.01). After a median follow-up duration of 96.0 weeks, treatment failure occurred in 19 (14.9%) and 34 (18.3%) patients in the TDF group and non-TDF group, respectively (p = 0.60). Low-level viremia (40-200 copies/mL) before switch (adjusted hazard ratio, 2.12; 95% confidence interval, 1.12-4.01) and without therapeutic drug monitoring (adjusted hazard ratio, 2.08; 95% confidence interval, 1.16-3.73) were risk factors for treatment failure. CONCLUSION Switch to unboosted atazanavir with TDF/lamivudine achieves a similar treatment response to that with two other nucleoside reverse-transcriptase inhibitors in patients achieving virological suppression with the guidance of therapeutic drug monitoring.
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Affiliation(s)
- Mao-Song Tsai
- Department of Internal Medicine, Far Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Sui-Yuan Chang
- Department of Laboratory Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan; Department of Clinical Laboratory Sciences and Medical Biotechnology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Shu-Wen Lin
- Department of Pharmacy, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan; School of Pharmacy, National Taiwan University, Taipei, Taiwan
| | - Ching-Hua Kuo
- Department of Pharmacy, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan; Graduate Institute of Clinical Pharmacy, National Taiwan University, Taipei, Taiwan
| | - Hsin-Yun Sun
- Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Bin-Ru Wu
- Department of Clinical Laboratory Sciences and Medical Biotechnology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Sue-Yo Tang
- Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Wen-Chun Liu
- Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Yi-Ching Su
- Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Chien-Ching Hung
- Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan; Department of Medical Research, China Medical University Hospital, Taichung, Taiwan; China Medical University, Taichung, Taiwan.
| | - Shan-Chwen Chang
- Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
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Fabbiani M, Di Giambenedetto S, Cingolani A, Fanti I, Colafigli M, Tamburrini E, Cauda R, Navarra P, De Luca A, Murri R. Relationship between self-reported adherence, antiretroviral drug concentration measurement and self-reported symptoms in patients treated for HIV-1 infection. Infect Dis (Lond) 2015; 48:48-55. [DOI: 10.3109/23744235.2015.1082034] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Venuto CS, Mollan K, Ma Q, Daar ES, Sax PE, Fischl M, Collier AC, Smith KY, Tierney C, Morse GD. Sex differences in atazanavir pharmacokinetics and associations with time to clinical events: AIDS Clinical Trials Group Study A5202. J Antimicrob Chemother 2014; 69:3300-10. [PMID: 25159623 DOI: 10.1093/jac/dku303] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
OBJECTIVES It is uncertain whether HIV-1 antiretroviral exposure and clinical response varies between males and females or different race/ethnic groups. We describe ritonavir-enhanced atazanavir pharmacokinetics in relation to virological failure, safety and tolerability in treatment-naive individuals to investigate potential differences. METHODS Plasma samples were collected from participants in AIDS Clinical Trials Group Study A5202 for measurement of antiretroviral concentrations. Individual estimates of apparent oral clearance of atazanavir (L/h) were calculated from a one-compartment model and divided into tertiles as slow (<7), middle (7 to <9; reference group) and fast (≥9). Associations between atazanavir clearance and clinical outcomes were estimated with a hazard ratio (HR) from Cox proportional hazards models. Interactions between atazanavir clearance and sex, race/ethnicity and NRTIs were investigated for each of the outcomes. RESULTS Among 786 participants, average atazanavir clearance was slower in females (n = 131) than males (n = 655). Atazanavir clearance was associated with time to virological failure (P = 0.053) and this relationship differed significantly by sex (P = 0.003). Females in the fast atazanavir clearance group had shorter time to virological failure (HR 3.49; 95% CI 1.24-9.84) compared with the middle (reference) atazanavir clearance group. Among males, the slow atazanavir clearance group had a higher risk of virological failure (HR 2.10; 95% CI 1.16-3.77). CONCLUSIONS Atazanavir clearance differed by sex. Females with fast clearance and males with slow clearance had increased risk of virological failure.
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Russo CD, Lisi L, Fabbiani M, Gagliardi D, Fanti I, Giambenedetto SD, Cauda R, Navarra P. Detection of HLA-B*57:01 by real-time PCR: implementation into routine clinical practice and additional validation data. Pharmacogenomics 2014; 15:319-27. [DOI: 10.2217/pgs.13.242] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim:HLA-B*57:01 status needs to be determined before initiating abacavir therapy. We developed a pharmacogenetic real-time (Q)-PCR screening test using two sets of sequence specific primers. This test has been implemented into routine clinical practice. Materials & methods: HIV-infected patients admitted at our University Hospital were thus genotyped using the above mentioned test. A panel of 80 DNA samples with a known genotype were used to characterize Q-PCR conditions using different master mixes. Results: A total of 353 patients were genotyped, detecting 15 (4.25%) HLA-B*57:01 positive carriers. Among the negative patients, 17.2% were treated with abacavir without any hypersensitivity reaction. Using different Q-PCR master mixes, significantly lower cutoff Ct values were found, thus new analytical settings are provided. Conclusion: The pharmacogenetic test developed in our laboratory for the fast screening of HLA-B*57:01 can be successfully implemented into routine clinical practice. All 16 sequences (including an additional six) currently known for the HLA-B*57:01 allele are detected by sequence specific primers used in this test. The Brilliant II SYBR® Green QPCR MM (Stratagene) can safely replace the master mix originally used to develop the test. Original submitted 2 August 2013; Revision submitted 2 December 2013
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Affiliation(s)
- Cinzia Dello Russo
- Institute of Pharmacology, Catholic University Medical School, L.go F Vito 1, 00168 Rome, Italy
| | - Lucia Lisi
- Institute of Pharmacology, Catholic University Medical School, L.go F Vito 1, 00168 Rome, Italy
| | - Massimiliano Fabbiani
- Institute of Clinical Infectious Diseases, Catholic University Medical School, Rome, Italy
| | - Dimitri Gagliardi
- Manchester Institute of Innovation Research, MBS, the University of Manchester, UK
| | - Iuri Fanti
- Institute of Clinical Infectious Diseases, Catholic University Medical School, Rome, Italy
| | | | - Roberto Cauda
- Institute of Clinical Infectious Diseases, Catholic University Medical School, Rome, Italy
| | - Pierluigi Navarra
- Institute of Pharmacology, Catholic University Medical School, L.go F Vito 1, 00168 Rome, Italy
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Fortuna S, Ragazzoni E, Lisi L, Di Giambenedetto S, Fabbiani M, Navarra P. Validation of an UPLC-MS/MS method for quantitative analysis of raltegravir in human plasma samples. Ther Drug Monit 2013; 35:258-63. [PMID: 23407478 DOI: 10.1097/ftd.0b013e318280110d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND An ultra-performance liquid chromatography-tandem mass spectrometry method was developed for the quantification of raltegravir (RTG) plasma concentrations in samples from HIV patients treated with the drug. METHODS Plasma samples were extracted by liquid-liquid extraction followed by evaporation to dryness and reconstitution in mobile phase. The chromatographic separation was carried out on an AQUITY UPLC C18 column with an isocratic mobile phase consisting of water containing 0.1% formic acid and acetonitrile containing 0.1% formic acid (50:50 vol/vol). The detection was performed on a triple quadrupole tandem mass spectrometer using multi-reaction monitoring via electrospray ionization source with positive ionization mode. RESULTS Under these conditions, a single chromatographic run could be completed within 1 minute. The method was validated by estimating the precision and the accuracy for inter- and intra-day analysis in the concentration range of 5-2560 ng/mL. The method was linear over the investigated range with all the correlation coefficients, r, greater than 0.995 on 5 replicates. The intra- and inter-day precision (percentage of coefficient of variation) ranged from 2.4% to 11.2%, and the inaccuracy (percent of relative standard deviation) ranged from 2.5% to 12.9%. No significant matrix effect was observed. The mean recovery value of RTG was 80%. CONCLUSIONS This rapid and sensitive method was validated and could be applied to pharmacokinetic studies for the determination of RTG concentrations in human plasma samples.
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Affiliation(s)
- Serena Fortuna
- Clinical Pharmacology Unit, Agostino Gemelli Academic Hospital, Rome, Italy
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Schoen JC, Erlandson KM, Anderson PL. Clinical pharmacokinetics of antiretroviral drugs in older persons. Expert Opin Drug Metab Toxicol 2013; 9:573-88. [PMID: 23514375 DOI: 10.1517/17425255.2013.781153] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
INTRODUCTION Combination antiretroviral therapy has enabled HIV-infected persons to reach older ages in high numbers. Hepatic and renal changes that normally occur with advancing age occur earlier and with higher incidence in HIV-infected individuals. A limited number of prospective controlled studies have demonstrated small reductions (17 to 41%) in lopinavir, atazanavir and lamivudine clearance in older versus younger adults. A much larger number of retrospective studies in adults (age range ∼ 20 to 60 years), including all antiretroviral drugs, have evaluated age as a covariate for pharmacokinetics. Most studies did not detect substantial associations between drug exposures and age. AREAS COVERED This review summarizes antiretroviral drug pharmacokinetics in older persons. The authors review articles from PubMed (search terms: elderly, antiretroviral, pharmacokinetics) in addition to the bibliographies of those selected. EXPERT OPINION The evidence to date does not support major pharmacokinetic changes in adults between ∼ 20 and 60 years of age. However, additional prospective, well-controlled studies are needed in more persons > 60 years, including those with frailty and comorbidities, with assessment of unbound drug clearance, and incorporation of adherence, pharmacogenetics and concomitant medications. Until then, guidelines for drug-drug interactions and dosing in renal and hepatic impairment should be followed in older HIV-infected individuals.
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Affiliation(s)
- John C Schoen
- University of Colorado, Skaggs School of Pharmacy and Pharmaceutical Sciences, Anschutz Medical Campus, Aurora, CO, USA
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Di Giambenedetto S, Fabbiani M, Colafigli M, Ciccarelli N, Farina S, Sidella L, D'Avino A, Mondi A, Cingolani A, Tamburrini E, Murri R, Navarra P, Cauda R, De Luca A. Safety and feasibility of treatment simplification to atazanavir/ritonavir + lamivudine in HIV-infected patients on stable treatment with two nucleos(t)ide reverse transcriptase inhibitors + atazanavir/ritonavir with virological suppression (Atazanavir and Lamivudine for treatment Simplification, AtLaS pilot study). J Antimicrob Chemother 2013; 68:1364-72. [DOI: 10.1093/jac/dkt007] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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Kunimoto Y, Yasui H, Touda N, Okazaki M, Nakata H, Noda N, Ikeda H, Hayashi T, Takahashi S, Shinomura Y, Ishida T, Miyamoto A. Coadministration of tenofovir decreased atazanavir plasma concentration after unilateral nephrectomy. J Infect Chemother 2013; 19:750-3. [DOI: 10.1007/s10156-012-0488-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Accepted: 09/18/2012] [Indexed: 10/27/2022]
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Abstract
One may consider that drug-drug interactions (DDIs) associated with antacids is an obsolete topic because they are prescribed less frequently by medical professionals due to the advent of drugs that more effectively suppress gastric acidity (i.e. histamine H(2)-receptor antagonists [H2RAs] and proton pump inhibitors [PPIs]). Nevertheless, the use of antacids by ambulant patients may be ever increasing, because they are freely available as over-the-counter (OTC) drugs. Antacids consisting of weak basic substances coupled with polyvalent cations may alter the rate and/or the extent of absorption of concomitantly administered drugs via different mechanisms. Polyvalent cations in antacid formulations may form insoluble chelate complexes with drugs and substantially reduce their bioavailability. Clinical studies demonstrated that two classes of antibacterials (tetracyclines and fluoroquinolones) are susceptible to clinically relevant DDIs with antacids through this mechanism. Countermeasures against this type of DDI include spacing out the dosing interval - taking antacid either 4 hours before or 2 hours after administration of these antibacterials. Bisphosphonates may be susceptible to DDIs with antacids by the same mechanism, as described in the prescription information of most bisphosphonates, but no quantitative data about the DDIs are available. For drugs with solubility critically dependent on pH, neutralization of gastric fluid by antacids may alter the dissolution of these drugs and the rate and/or extent of their absorption. However, the magnitude of DDIs elicited by antacids through this mechanism is less than that produced by H2RAs or PPIs; therefore, the clinical relevance of such DDIs is often obscure. Magnesium ions contained in some antacid formulas may increase gastric emptying, thereby accelerating the rate of absorption of some drugs. However, the clinical relevance of this is unclear in most cases because the difference in plasma drug concentration observed after dosing shortly disappears. Recent reports have indicated that some of the molecular-targeting agents such as the tyrosine kinase inhibitors dasatinib and imatinib, and the thrombopoietin receptor agonist eltrombopag may be susceptible to DDIs with antacids. Finally, the recent trend of developing OTC drugs as combination formulations of an antacid and an H2RA is a concern because these drugs will increase the risk of DDIs by dual mechanisms, i.e. a gastric pH-dependent mechanism by H2RAs and a cation-mediated chelation mechanism by antacids.
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Affiliation(s)
- Ryuichi Ogawa
- Department of Pharmacotherapy, Meiji Pharmaceutical University, Kiyose, Tokyo, Japan.
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Cattaneo D, Ripamonti D, Baldelli S, Cozzi V, Fucile S, Clementi E. Limited sampling strategies for the estimation of atazanavir daily exposure in HIV-infected patients. Fundam Clin Pharmacol 2011; 27:216-22. [DOI: 10.1111/j.1472-8206.2011.01005.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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14
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Gandhi M, Ameli N, Bacchetti P, Anastos K, Gange SJ, Minkoff H, Young M, Milam J, Cohen MH, Sharp GB, Huang Y, Greenblatt RM. Atazanavir concentration in hair is the strongest predictor of outcomes on antiretroviral therapy. Clin Infect Dis 2011; 52:1267-75. [PMID: 21507924 DOI: 10.1093/cid/cir131] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Adequate exposure to antiretrovirals is important to maintain durable responses, but methods to assess exposure (eg, querying adherence and single plasma drug level measurements) are limited. Hair concentrations of antiretrovirals can integrate adherence and pharmacokinetics into a single assay. METHODS Small hair samples were collected from participants in the Women's Interagency HIV Study (WIHS), a large cohort of human immunodeficiency virus (HIV)-infected (and at-risk noninfected) women. From 2003 through 2008, we analyzed atazanavir hair concentrations longitudinally for women reporting receipt of atazanavir-based therapy. Multivariate random effects logistic regression models for repeated measures were used to estimate the association of hair drug levels with the primary outcome of virologic suppression (HIV RNA level, <80 copies/mL). RESULTS 424 WIHS participants (51% African-American, 31% Hispanic) contributed 1443 person-visits to the analysis. After adjusting for age, race, treatment experience, pretreatment viral load, CD4 count and AIDS status, and self-reported adherence, hair levels were the strongest predictor of suppression. Categorized hair antiretroviral levels revealed a monotonic relationship to suppression; women with atazanavir levels in the highest quintile had odds ratios (ORs) of 59.8 (95% confidence ratio, 29.0-123.2) for virologic suppression. Hair atazanavir concentrations were even more strongly associated with resuppression of viral loads in subgroups in which there had been previous lapses in adherence (OR, 210.2 [95% CI, 46.0-961.1]), low hair levels (OR, 132.8 [95% CI, 26.5-666.0]), or detectable viremia (OR, 400.7 [95% CI, 52.3-3069.7]). CONCLUSIONS Antiretroviral hair levels surpassed any other predictor of virologic outcomes to HIV treatment in a large cohort. Low antiretroviral exposure in hair may trigger interventions prior to failure or herald virologic failure in settings where measurement of viral loads is unavailable. Monitoring hair antiretroviral concentrations may be useful for prolonging regimen durability.
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Affiliation(s)
- Monica Gandhi
- Departments of Medicine, University of California, San Francisco, 94122, USA.
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15
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Fabbiani M, Bracciale L, Doino M, D'Avino A, Marzocchetti A, Navarra P, Cauda R, De Luca A, Di Giambenedetto S. Tenofovir discontinuation could predispose to urolithiasis in atazanavir-treated patients. J Infect 2011; 62:319-21. [PMID: 21329725 DOI: 10.1016/j.jinf.2011.02.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2011] [Revised: 02/07/2011] [Accepted: 02/09/2011] [Indexed: 11/16/2022]
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16
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Abstract
We examined factors associated with virological failure in 310 HIV-infected patients receiving atazanavir (ATV). Independent links were identified with virological failure under ATV: virological failure previous history (P = 0.006) and ATV underdosing (P = 0.04). A maintenance therapy was protective (P = 0.01). The optimal therapeutic ranges of ATV concentration were found to be from 300 ng/ml (or 180 for patients treated with maintenance therapy) to 650 ng/ml for C24 and from 1000 ng/ml (or 500 for patients treated with maintenance therapy) to 2000 ng/ml for C12.
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