Abstract
Objective
To investigate the plasma levels of lopinavir by enzyme-linked immunosorbent assay (ELISA) in a cohort of patients who were vertically infected with human immunodeficiency virus 1 (HIV).
Methods
Plasma levels of lopinavir (Cmin) were determined by ELISA test in patients treated with lopinavir/ritonavir-based combined antiretroviral therapy who had achieved virological response after 4 wk of therapy. Reference lopinavir concentrations were Cmin 1–8 μg/mL. Correlation between lopinavir plasma concentration and continuous variables was evaluated by mean of Pearson correlation coefficient. Differences in lopinavir (LPV) concentration for binary categorical variables were assessed by Mann-Whitney test, while for variables with more than two categories Kruskal-Wallis test was used.
Results
Thirty-four patients were enroled; median age was 133 mo (15–265). The median lopinavir dose tested was 383.5 mg/kg (IQR: 266.6–400 mg/kg), with a median plasma concentration of 8.8 μg/mL (IQR: 5–14 μg/mL). Lopinavir Cmin was <1 μg/mL in only one sample (2.9 %), while 14 samples had Cmin between 1 and 8 μg/mL (41.2 %) and 19 (55.9 %) > 8 μg/mL. No significant correlations were found between plasma concentrations of lopinavir and the continuous variables considered in the study. A negative but, not completely significant, correlation was found between plasma drug concentration and body mass index (r = −0.29; p = 0.09).
Conclusions
The use of a simple and relatively cost-effective methodology might render therapeutic drug monitoring (TDM) appeal in the daily clinical practice.
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Acknowledgments
The authors are indebted to Professor PierLuigi Navarra, for encouraging the continuation of the paper. They would also like to thank the children and their parents/ legal guardians for their participation to the study.
Contributions
RR passed away during the development of this manuscript. She reviewed the outline and first draft in detail for clinical accuracy and intellectual content. AD, RR, RP, VG, FG, LT, FM, EF, LN had full access to all the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis. AD, RR: Study concept and design; MS, AS, IS: Statistical expertise; AD, RP, CV, LT: Drafting of the manuscript; LD, RP, LT: Critical revision of the manuscript for important intellectual content. All authors approved the final version of the manuscript.
Conflict of Interest
The authors did not receive any financial support for their contribution to this study, but AD has received prior research funding and/or consultancy honoraria from Abbott, Bristol Myers Squibb, Gilead, Janssen-Cilag, Merck Sharp & Dohme, Roche, and ViiV.
Role of Funding Source
The study was supported by Programma Nazionale di Ricerca sull’AIDS, Istituto Superiore di Sanità, Italy, Grants 30F/06. Codice Eudract 2007–00389638 “Studio di farmacocinetica e farmacodinamica nella ottimizzazione della terapia antiretrovirale”.
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Prinapori, R., Rosso, R., Di Biagio, A. et al. Pharmacokinetics of Lopinavir Determined with an ELISA Test in Youths with Perinatally Acquired HIV. Indian J Pediatr 81, 856–860 (2014). https://doi.org/10.1007/s12098-013-1198-1
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DOI: https://doi.org/10.1007/s12098-013-1198-1