Modeling HCV cure after an ultra-short duration of therapy with direct acting agents
Abstract
In cases of sustained-virological response (SVR or cure) after an ultra-short duration (≤ 27 days) of direct-acting antiviral (DAA)-based therapy, despite HCV being detected at end of treatment (EOT), have been reported. Established HCV mathematical models that predict the treatment duration required to achieve cure do not take into account the possibility that the infectivity of virus produced during treatment might be reduced. The aim of this study was to develop a new mathematical model that considers the fundamental and critical concept that HCV RNA in serum represents both infectious virus (Vi) and non-infectious virus (Vni) in order to explain the observation of cure with ultrashort DAA therapy. Established HCV models were compared to the new mathematical model to retrospectively explain cure in 2 patients who achieved cure after 24 or 27 days of paritaprevir, ombitasvir, dasabuvir, ritonavir and ribavirin or sofosbuvir plus ribavirin, respectively. Fitting established models with measured longitudinal HCV viral loads indicated that in both cases, cure would not have been expected without an additional 3–6 weeks of therapy after the actual EOT. In contrast, the new model fits the observed outcome by considering that in addition to blocking Vi and Vni production (ε~0.998), these DAA +more »
- Authors:
-
- Loyola Univ. Medical Center, Maywood, IL (United States). Program for Experimental and Theoretical Modeling; Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sha'are Zedek Medical Center, Jerusalem (Israel)
- Medical Univ. of South Carolina, Charleston, SC (United States). Dept. of Microbiology and Immunology; National Inst. of Health (NIH), Bethesda, MD (United States). national Inst. of Allergy and Infectious Diseases
- Food and Drug Administration, Silver Springs, MD (United States). Center for Biologics Evaluation and Research
- Loyola Univ. Medical Center, Maywood, IL (United States). Program for Experimental and Theoretical Modeling; Univ. of Illinois, Chicago, IL (United States). Dept. of Microbiology and Immunology
- Loyola Univ. Medical Center, Maywood, IL (United States). Program for Experimental and Theoretical Modeling
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE; National Institutes of Health (NIH)
- OSTI Identifier:
- 1375871
- Report Number(s):
- LA-UR-17-20262
Journal ID: ISSN 0166-3542
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Antiviral Research
- Additional Journal Information:
- Journal Volume: 144; Journal Issue: C; Journal ID: ISSN 0166-3542
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 60 APPLIED LIFE SCIENCES; 59 BASIC BIOLOGICAL SCIENCES; Biological Science
Citation Formats
Goyal, Ashish, Lurie, Yoav, Meissner, Eric G., Major, Marian, Sansone, Natasha, Uprichard, Susan L., Cotler, Scott J., and Dahari, Harel. Modeling HCV cure after an ultra-short duration of therapy with direct acting agents. United States: N. p., 2017.
Web. doi:10.1016/j.antiviral.2017.06.019.
Goyal, Ashish, Lurie, Yoav, Meissner, Eric G., Major, Marian, Sansone, Natasha, Uprichard, Susan L., Cotler, Scott J., & Dahari, Harel. Modeling HCV cure after an ultra-short duration of therapy with direct acting agents. United States. https://doi.org/10.1016/j.antiviral.2017.06.019
Goyal, Ashish, Lurie, Yoav, Meissner, Eric G., Major, Marian, Sansone, Natasha, Uprichard, Susan L., Cotler, Scott J., and Dahari, Harel. Fri .
"Modeling HCV cure after an ultra-short duration of therapy with direct acting agents". United States. https://doi.org/10.1016/j.antiviral.2017.06.019. https://www.osti.gov/servlets/purl/1375871.
@article{osti_1375871,
title = {Modeling HCV cure after an ultra-short duration of therapy with direct acting agents},
author = {Goyal, Ashish and Lurie, Yoav and Meissner, Eric G. and Major, Marian and Sansone, Natasha and Uprichard, Susan L. and Cotler, Scott J. and Dahari, Harel},
abstractNote = {In cases of sustained-virological response (SVR or cure) after an ultra-short duration (≤ 27 days) of direct-acting antiviral (DAA)-based therapy, despite HCV being detected at end of treatment (EOT), have been reported. Established HCV mathematical models that predict the treatment duration required to achieve cure do not take into account the possibility that the infectivity of virus produced during treatment might be reduced. The aim of this study was to develop a new mathematical model that considers the fundamental and critical concept that HCV RNA in serum represents both infectious virus (Vi) and non-infectious virus (Vni) in order to explain the observation of cure with ultrashort DAA therapy. Established HCV models were compared to the new mathematical model to retrospectively explain cure in 2 patients who achieved cure after 24 or 27 days of paritaprevir, ombitasvir, dasabuvir, ritonavir and ribavirin or sofosbuvir plus ribavirin, respectively. Fitting established models with measured longitudinal HCV viral loads indicated that in both cases, cure would not have been expected without an additional 3–6 weeks of therapy after the actual EOT. In contrast, the new model fits the observed outcome by considering that in addition to blocking Vi and Vni production (ε~0.998), these DAA + ribavirin treatments further enhanced the ratio of Vni to Vi, thus increasing the log (Vni/Vi) from 1 at pretreatment to 6 by EOT, which led to <1 infectious-virus particle in the extracellular body fluid (i.e., cure) prior to EOT. This new model can explain cure after short duration of DAA + ribavirin therapy by suggesting that a minimum 6-fold increase of log (Vni/Vi) results from drug-induced enhancement of the Vni/Vi.},
doi = {10.1016/j.antiviral.2017.06.019},
journal = {Antiviral Research},
number = C,
volume = 144,
place = {United States},
year = {Fri Jun 30 00:00:00 EDT 2017},
month = {Fri Jun 30 00:00:00 EDT 2017}
}
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