Pharmacokinetics of Intravenous Acyclovir in Oncologic Paediatric Patients

University of Pisa

Status

Enrolling

Conditions

Oncology

Varicella Zoster Virus Infection

Transplantation Infection

Herpes Simplex 1

Herpesviridae Infections

Treatments

Other: Pharmacokinetic analysis

Study type

Observational

Funder types

Other

Identifiers

NCT05198570

RC_10/20

Details and patient eligibility

About

Herpesvirus infections may be severe in immunocompromised patients, with a high risk of complications and mortality.
Recipients of hematopoietic stem cell transplant (HSCT) or patients receiving high-intensity chemotherapy for hematological malignancies are the most vulnerable individuals.
Although the worldwide prevalence of herpes simplex virus 1 (HSV-1) and varicella-zoster virus (VZV), antiviral prophylaxis in seropositive HSCT recipients has significantly reduced the rate of infection.
Acyclovir (ACV) is the first-choice drug for the prophylaxis or the therapy of that kind of infection.
Since the beginning, ACV has demonstrated to be characterized by a large interpatient variability, especially in children.
Therefore, therapeutic drug monitoring and pharmacokinetic studies may help in optimizing drug in children with malignancies.

Full description

Herpesvirus infections may lead to severe disease with a high risk of complications and mortality in hematopoietic stem cell transplant (HSCT) recipients, or in patients receiving high-intensity chemotherapy for hematological malignancies. That risk is mainly associated with the worldwide prevalence of herpes simplex virus 1 (HSV-1) that increases consistently with age. In particular, the majority of adult leukemia patients are HSV seropositive, while allogeneic HSCT recipients had post-transplant HSV reactivation. It is worth noting that in the first post-transplant year, symptomatic varicella-zoster virus (VZV) reactivation has a rate of 13% - 55% in adult recipients. Similar percentages of children receiving HSCT had VZV reactivation, being also possible a disseminated infection in 10% of children. However, thanks to antiviral prophylaxis in seropositive HSCT recipients, the rate of infection has significantly dropped.

Among the drugs most used for treatment and prophylaxis of HSV/VZV infections among children who are HSCT recipients or undergo a high-intensity chemotherapy, acyclovir represents the drug of choice. Although its role in preventing and treating herpes virus infections, the pharmacokinetics of acyclovir is highly variable, especially in patients in intensive care units, in those who have organ dysfunction, or in children. In particular, information about the optimal use of acyclovir in children with malignancies is limited.

Enrollment

200 estimated patients

Sex

All

Ages

6 months to 18 years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Patients with Hematological malignancies
HSCT recipients who require ACV prophylaxis or treatment for HSV-VZV infection or
Children undergoing high-intensity antineoplastic chemotherapy who need ACV treatment.
Intravenous or oral ACV dosing
Active/available a therapeutic drug monitoring (TDM) protocol for ACV
Informed consent signed by patient's parents

Exclusion criteria