Background: Acyclovir and valacyclovir are used for the treatment and prophylaxis of infections with herpes simplex virus (HSV) and varicella zoster virus (VZV). The aim of this study is to provide insight into the pharmacodynamics (PD) of (val)acyclovir.
Methods: Patients were retrospectively selected, based on therapeutic drug monitoring for acyclovir, to create a population pharmacokinetic (PK) model in Pmetrics. This PK model was used to develop a PK/PD model to study the effect of acyclovir levels on VZV viral load in plasma in immunocompromised patients.
Results: Immunocompromised patients with known VZV viral loads in plasma were included for PK/PD modelling ( = 4, with 23 measure points); they were part of the population of 43 patients used for PK model building. The PK/PD model described the data well (r = 0.83). This is a hopeful first step in clarifying the pharmacodynamics of acyclovir; however, the data in this study are limited.
Conclusions: Our preliminary PK/PD model can be used in further research to determine the effect of acyclovir levels on VZV viral load.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9695373 | PMC |
| http://dx.doi.org/10.3390/pharmaceutics14112311 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Mechanism-Based Pharmacokinetic/Pharmacodynamic Modeling of Erythroferrone in Anemic Rats with Chronic Kidney Disease and Chemotherapy-Induced Anemia: An Early Biomarker for Hemoglobin Response and rHuEPO Hyporesponsiveness.
ACS Pharmacol Transl Sci
January 2025
Guangdong-Hong Kong-Macao Joint Laboratory for New Drug Screening, School of Pharmacy, The Chinese University of Hong Kong, Shatin 999077, Hong Kong SAR, P. R. China.
Erythroferrone (ERFE) has emerged as a potential biomarker for the erythropoiesis response following recombinant human erythropoietin (rHuEPO) treatment. While the association between ERFE and hemoglobin (HGB) response to rHuEPO is well-established in nonanemic conditions, such correlation and ERFE kinetics in anemic states remain unclear. We employed two rat models of anemia, chronic kidney disease (CKD) anemia and chemotherapy-induced anemia (CIA), to determine ERFE kinetics and its correlation with HGB responses after rHuEPO administration.
View Article and Find Full Text PDFFirst-in-human phase I trial of the bispecific CD47 inhibitor and CD40 agonist Fc-fusion protein, SL-172154 in patients with platinum-resistant ovarian cancer.
J Immunother Cancer
January 2025
Medical Oncology, Sarah Cannon Research Institute, Nashville, Tennessee, USA.
Background: SL-172154 is a hexameric fusion protein adjoining the extracellular domain of SIRPα to the extracellular domain of CD40L via an inert IgG-derived Fc domain. In preclinical studies, a murine equivalent SIRPα-Fc-CD40L fusion protein provided superior antitumor immunity in comparison to CD47- and CD40-targeted antibodies. A first-in-human phase I trial of SL-172154 was conducted in patients with platinum-resistant ovarian cancer.
View Article and Find Full Text PDFDose-Limiting Toxicities of Paclitaxel in Breast Cancer Patients: Studying Interactions Between Pharmacokinetics, Physical Activity, and Body Composition-A Protocol for an Observational Cohort Study.
Cancers (Basel)
December 2024
Rehabilitation Research, Vrije Universiteit Brussel (VUB), Laarbeeklaan 121, 1090 Jette, Belgium.
: Paclitaxel (PTX), a commonly used chemotherapy for breast cancer (BC), is associated with dose-limiting toxicities (DLTs) such as peripheral neuropathy and neutropenia. These toxicities frequently lead to dose reductions, treatment delays, or therapy discontinuation, negatively affecting patients' quality of life and clinical outcomes. Current dosing strategies based on body surface area (BSA) fail to account for individual variations in body composition (skeletal muscle mass (SMM) and adipose tissue (AT) mass) and physical activity (PA), which can influence drug metabolism and toxicity.
View Article and Find Full Text PDFPopulation pharmacokinetics and pharmacodynamics of HFB30132A, a monoclonal antibody against SARS-CoV-2, in healthy Chinese and US subjects.
Int J Antimicrob Agents
January 2025
Clinical Pharmacology Research Center, Huashan Hospital, Fudan University, Shanghai, China; National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China; Research ward, Huashan Hospital, Fudan University, Shanghai, China. Electronic address:
Development of neutralizing monoclonal antibody (nAb) is a strategy for treatment of infections caused by SARS-CoV-2. This study evaluated the pharmacokinetics (PK) and pharmacodynamics (PD) of HFB30132A, a fully human nAb targeting SARS-CoV-2 spike protein receptor binding domain, in healthy subjects. Randomized, double-blind, placebo-controlled phase I trial was performed in healthy Chinese and US subjects, respectively.
View Article and Find Full Text PDFUnravelling sources of variability on rocuronium pharmacokinetics: Implications for prolonged recovery in older patients.
Br J Clin Pharmacol
January 2025
Center for Pharmacometrics and Systems Pharmacology, Department of Pharmaceutics. College of Pharmacy, University of Florida, Orlando, FL, USA.
Aims: Residual neuromuscular blockade (RNB) commonly occurs when using neuromuscular blockers and increases the risk for pulmonary complications, such as airway obstruction and severe hypoxemia, in extubated patients. Rocuronium exhibits a high variability in recovery time, contributing to an increased risk for RNB. This study aimed to identify and characterize the sources of variability in rocuronium exposure and response via a population pharmacokinetic/pharmacodynamic (PK/PD) analysis and to apply the developed PK/PD model to investigate clinical implications.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!